Three-coordinate measuring instrument

Abstract

A measuring head of the three-coordinate measuring instrument is installed on a driving mechanism, a bearing table is arranged below the measuring head and at the top of a machine table, a sliding groove is symmetrically formed in the upper surface of the bearing table relative to the center line, and a connecting plate is connected to the interior of the sliding groove in a sliding mode. A second spring is arranged between the connecting plate and the inner wall of the sliding groove, a first clamping plate fixedly connected with the connecting plate is arranged above the bearing table, and the two first clamping plates are oppositely arranged. The first clamping plate is provided with a mounting frame with a fixing block at the top, a second clamping plate is arranged below the fixing block, the fixing block is in threaded connection with a lead screw, and the lower end of the lead screw is rotationally connected with the second clamping plate. The three-coordinate measuring instrument provided by the utility model greatly improves the position precision of a product, is simple and convenient to operate, avoids the warping of the product, reduces the measurement error of the Z axis, and is beneficial to improving the overall measurement precision.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments, and particularly relates to a three-coordinate measuring instrument. Background Art

[0002] A three-coordinate measuring instrument is a modern measuring tool with both detection and statistical analysis functions, and is widely used in various industries, such as precision measurement of structures such as mold equipment, fixture, automotive mold parts, electronic appliances, etc.

[0003] After retrieval, the Chinese patent with the authorization announcement number of CN 207317764U discloses a "novel three-coordinate measuring instrument", which includes a base, a platform is arranged on the base, sliding grooves are respectively arranged on the left and right sides of the platform, a first column and a second column are arranged in the sliding grooves, a cross beam is arranged between the first column and the second column, a guide rail is arranged on the cross beam, a detection arm is sleeved on the guide rail, the detection arm is vertically arranged relative to the cross beam and the detection arm can slide along the guide rail, a driving piston is arranged in the detection arm, the movable end of the driving piston can move in the vertical direction, a detection head is arranged at the movable end of the driving piston, and a fixing device is also arranged on the platform. The utility model is applicable to a three-coordinate measuring instrument.

[0004] In the prior art, when a product is placed on the carrier of the existing device, the product can be clamped and fixed by a fixture. However, the operation of the fixture is relatively cumbersome, and the product is not fixed in the Z-axis direction, resulting in the product being prone to warping and affecting the measurement accuracy of the Z-axis height of the product. Summary of the Invention

[0005] The purpose of the utility model is to provide a three-coordinate measuring instrument, which is simple and convenient to operate, avoids the warping of the product, reduces the measurement error of the Z-axis, and is beneficial to improving the overall measurement accuracy.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: a three-coordinate measuring instrument, including: a machine table, a measuring head located above the machine table, the measuring head is installed on a driving mechanism, a bearing table is arranged below the measuring head and at the top of the machine table, a sliding groove with a connecting plate slidably connected inside is symmetrically opened on the upper surface of the bearing table about the center line, and a second spring is arranged between the connecting plate and the inner wall of the sliding groove, a first clamping plate fixedly connected with the connecting plate is arranged above the bearing table, and two first clamping plates are arranged oppositely;

[0007] An installation frame with a fixing block at the top is arranged on the first clamping plate, a second clamping plate is arranged below the fixing block, and a lead screw is threadedly connected to the fixing block, and the lower end of the lead screw is rotatably connected to the second clamping plate.

[0008] The further improved solutions in the above technical solutions are as follows:

[0009] 1. In the above solution, the driving mechanism includes: a first electric slide rail arranged along the X-axis direction, a second electric slide rail arranged along the Y-axis direction, and a third electric slide rail arranged along the Z-axis direction. The first electric slide rail with a first slide plate is respectively arranged on the left and right sides of the bearing table, and the second electric slide rail with a second slide plate is arranged between the two first slide plates.

[0010] 2. In the above solution, the third electric slide rail with a third slide plate is arranged on the second slide plate, and the third slide plate is connected with the measuring head.

[0011] 3. In the above solution, the mounting bracket is provided with a plurality of third chutes along the vertical direction, and a sliding block embedded in the third chute is arranged on the side wall of the second clamping plate.

[0012] 4. In the above solution, the second spring is located on the opposite sides of the two first clamping plates.

[0013] 5. In the above solution, a guide rod is fixedly installed inside the chute, and the connecting plate is slidably sleeved on the guide rod.

[0014] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art:

[0015] For the three-coordinate measuring instrument of the present utility model, a chute with a connecting plate slidably connected inside is symmetrically opened on the upper surface of the bearing table about the midline, and a second spring is arranged between the connecting plate and the inner wall of the chute. A first clamping plate fixedly connected with the connecting plate is arranged above the bearing table, and the two first clamping plates are arranged oppositely. Under the elastic force of the spring, the product can be clamped and fixed between the two first clamping plates, greatly improving the position accuracy of the product, and can also adapt to products of different sizes for clamping, and the operation is simple and convenient; further, a mounting bracket with a fixing block at the top is arranged on the first clamping plate, and a second clamping plate is arranged below the fixing block. The fixing block is threadedly connected with a lead screw, and the lower end of the lead screw is rotatably connected with the second clamping plate. After the product is clamped and fixed by the two first clamping plates, the second clamping plate is driven to descend by rotating the lead screw, so that the product is pressed and fixed on the bearing table, realizing the fixation of the product on the Z-axis, avoiding the warping of the product, reducing the measurement error of the Z-axis, and being beneficial to improving the overall measurement accuracy. Description of the Drawings

[0016] Att Figure 1 is the overall structural schematic diagram of the three-coordinate measuring instrument of the present utility model;

[0017] Att Figure 2Attached to the present utility model Figure 1 is an enlarged schematic view of part A;

[0018] Attached Figure 3 Attached to the present utility model Figure 1 is an enlarged schematic view of part B;

[0019] Attached Figure 4 is a partial structural schematic view of the three - coordinate measuring instrument of the present utility model.

[0020] In the above - mentioned drawings: 1. Machine platform; 2. First electric slide rail; 3. First slide plate; 4. Second electric slide rail; 5. Second slide plate; 6. Third electric slide rail; 7. Third slide plate; 8. Measuring head; 9. Bearing platform; 10. Connecting plate; 11. Mounting frame; 12. Second clamping plate; 13. Lead screw; 14. Sliding block; 15. Chute; 16. Fixed block; 17. Third chute; 18. Second spring; 19. Guide rod; 20. First clamping plate. Specific embodiments

[0021] The present patent can be further clearly understood through the following specific embodiments, but they do not limit the present patent.

[0022] Embodiment 1: A three - coordinate measuring instrument, comprising: a machine platform 1, a measuring head 8 located above the machine platform 1, the measuring head 8 is installed on a driving mechanism, a bearing platform 9 is provided below the measuring head 8 and at the top of the machine platform 1, a chute 15 with a connecting plate 10 slidably connected inside is symmetrically opened on the upper surface of the bearing platform 9 about the mid - line, and a second spring 18 is provided between the connecting plate 10 and the inner wall of the chute 15. A first clamping plate 20 fixedly connected to the connecting plate 10 is provided above the bearing platform 9, and the two first clamping plates 20 are arranged oppositely;

[0023] During use, the operator pushes the two first clamping plates away from each other, compressing the second spring. The product is placed on the surface of the bearing platform and between the two first clamping plates, and then the first clamping plates are released. Under the action of the elastic force, the two first clamping plates move closer to each other to clamp and fix the product;

[0024] A mounting frame 11 with a fixed block 16 at the top is provided on the first clamping plate 20. A second clamping plate 12 is provided below the fixed block 16. The fixed block 16 is threadedly connected with a lead screw 13, and the lower end of the lead screw 13 is rotatably connected to the second clamping plate 12.

[0025] Then, the lead screw is rotated to drive the second clamping plate to move downward, and during the downward movement of the second clamping plate, the sliding block moves along the third chute, greatly improving the stability of the movement of the third chute, thereby pressing the product against the surface of the bearing platform, avoiding the warping of the product, and reducing the measurement error of the Z - axis;

[0026] The above-mentioned driving mechanism includes: a first electric slide rail 2 arranged along the X-axis direction, a second electric slide rail 4 arranged along the Y-axis direction, and a third electric slide rail 6 arranged along the Z-axis direction. The first electric slide rail 2 with a first slide plate 3 is respectively arranged on the left and right sides of the above-mentioned bearing table 9, and the second electric slide rail 4 with a second slide plate 5 is arranged between the two above-mentioned first slide plates 3.

[0027] The third electric slide rail 6 with a third slide plate 7 is arranged on the above-mentioned second slide plate 5, and the above-mentioned third slide plate 7 is connected with the above-mentioned measuring head 8.

[0028] The above-mentioned mounting bracket 11 is provided with a plurality of third chutes 17 along the vertical direction, and a sliding block 14 embedded in the above-mentioned third chute 17 is arranged on the side wall of the above-mentioned second clamping plate 12.

[0029] A guide rod 19 is fixedly installed inside the above-mentioned chute 15, and the above-mentioned connecting plate 10 is slidably sleeved on the above-mentioned guide rod 19.

[0030] Embodiment 2: A three-coordinate measuring instrument, including: a machine table 1, a measuring head 8 located above the machine table 1. The measuring head 8 is installed on a driving mechanism. A bearing table 9 is arranged below the measuring head 8 and on the top of the machine table 1. A chute 15 with an internally slidably connected connecting plate 10 is symmetrically opened on the upper surface of the bearing table 9 about the midline, and a second spring 18 is arranged between the connecting plate 10 and the inner wall of the chute 15. A first clamping plate 20 fixedly connected with the connecting plate 10 is arranged above the bearing table 9, and the two first clamping plates 20 are arranged oppositely;

[0031] Under the elastic force of the spring, the product can be clamped and fixed between the two first clamping plates, greatly improving the position accuracy of the product, and can also adapt to products of different sizes for clamping, with simple and convenient operation;

[0032] A mounting bracket 11 with a fixing block 16 at the top is arranged on the above-mentioned first clamping plate 20. A second clamping plate 12 is arranged below the fixing block 16. The fixing block 16 is threadedly connected with a lead screw 13, and the lower end of this lead screw 13 is rotatably connected with the above-mentioned second clamping plate 12.

[0033] Furthermore, after the two first clamping plates clamp and fix the product, by rotating the lead screw to drive the second clamping plate to descend, the product is pressed and fixed on the bearing table, realizing the fixation of the product on the Z-axis, avoiding the warping of the product, reducing the measurement error on the Z-axis, and being beneficial to improving the overall measurement accuracy.

[0034] The above driving mechanism includes: a first electric slide rail 2 arranged along the X-axis direction, a second electric slide rail 4 arranged along the Y-axis direction, and a third electric slide rail 6 arranged along the Z-axis direction. The first electric slide rail 2 with a first slide plate 3 is respectively arranged on the left and right sides of the above-mentioned bearing table 9, and the second electric slide rail 4 with a second slide plate 5 is arranged between the two first slide plates 3.

[0035] The third electric slide rail 6 with a third slide plate 7 is arranged on the second slide plate 5, and the third slide plate 7 is connected with the above-mentioned measuring head 8.

[0036] A plurality of third chutes 17 are arranged vertically on the above-mentioned mounting bracket 11, and a sliding block 14 embedded in the third chute 17 is arranged on the side wall of the second clamping plate 12.

[0037] The above-mentioned second spring 18 is located on the opposite sides of the two first clamping plates 20.

[0038] At least two third chutes 17 are provided.

[0039] The above-mentioned lead screw 13 is rotatably connected to the second clamping plate 12 through a bearing.

[0040] The working principle is as follows:

[0041] During use, the operator pushes the two first clamping plates away from each other, compressing the second spring. The product is placed on the surface of the bearing table and between the two first clamping plates. Then, the first clamping plates are released, and under the action of the elastic force, the two first clamping plates move closer to each other to clamp and fix the product.

[0042] Then, the lead screw is rotated to drive the second clamping plate to move downward. During the downward movement of the second clamping plate, the sliding block moves along the third chute, greatly improving the stability of the movement of the third chute. Thus, the product is pressed against the surface of the bearing table, avoiding the warping of the product and reducing the measurement error in the Z-axis.

[0043] When the above three-coordinate measuring instrument is used, under the action of the elastic force of the spring, it can clamp and fix the product between the two first clamping plates, greatly improving the position accuracy of the product and being able to adapt to products of different sizes for clamping. The operation is simple and convenient. Further, after the two first clamping plates clamp and fix the product, by rotating the lead screw to drive the second clamping plate to descend, the product is pressed and fixed on the bearing table, realizing the fixation of the product in the Z-axis, avoiding the warping of the product, reducing the measurement error in the Z-axis, and being beneficial to improving the overall measurement accuracy.

[0044] The above embodiments are only used to illustrate the technical concept and features of the present utility model. The purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A coordinate measuring machine, comprising: A machine tool (1) and a measuring head (8) located above the machine tool (1), the measuring head (8) being mounted on a driving mechanism, characterized in that: a bearing table (9) is provided below the measuring head (8) and at the top of the machine tool (1), a chute (15) with a connecting plate (10) slidably connected therein is symmetrically opened on the upper surface of the bearing table (9) with respect to the center line, and a second spring (18) is provided between the connecting plate (10) and the inner wall of the chute (15), a first clamping plate (20) fixedly connected to the connecting plate (10) is provided above the bearing table (9), and two first clamping plates (20) are arranged oppositely; An installation frame (11) with a fixing block (16) at the top is provided on the first clamping plate (20), a second clamping plate (12) is provided below the fixing block (16), the fixing block (16) is threadedly connected with a lead screw (13), and the lower end of the lead screw (13) is rotatably connected to the second clamping plate (12).

2. The coordinate measuring machine according to claim 1, characterized in that: The driving mechanism includes: a first electric slide rail (2) arranged along the X-axis direction, a second electric slide rail (4) arranged along the Y-axis direction, and a third electric slide rail (6) arranged along the Z-axis direction. The first electric slide rail (2) with a first slide plate (3) is respectively arranged on the left and right sides of the bearing table (9), and the second electric slide rail (4) with a second slide plate (5) is arranged between the two first slide plates (3).

3. The coordinate measuring machine according to claim 2, characterized in that: The third electric slide rail (6) with a third slide plate (7) is arranged on the second slide plate (5), and the third slide plate (7) is connected with the measuring head (8).

4. The coordinate measuring machine according to claim 1, wherein: A plurality of third chutes (17) are opened vertically on the installation frame (11), and a sliding block (14) embedded in the third chutes (17) is provided on the side wall of the second clamping plate (12).

5. The coordinate measuring machine according to claim 1, characterized in that: The second spring (18) is located on the opposite sides of the two first clamping plates (20).

6. The coordinate measuring machine according to claim 1, wherein: A guide rod (19) is fixedly installed inside the chute (15), and the connecting plate (10) is slidably sleeved on the guide rod (19).

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