A three-coordinate measuring fixture suitable for a front box of an automobile

Abstract

The utility model relates to the technical field of automobile box body, and the application discloses a three -coordinate measuring fixture suitable for automobile front box body, including three -coordinate measuring instrument base, be provided with three -coordinate measuring instrument moving frame on three -coordinate measuring instrument base, be provided with three -coordinate measurement probe on three -coordinate measuring instrument moving frame, the utility model discloses a first adjusting outer pole is slid and is arranged on three -coordinate measuring instrument base top surface, and the first adjusting inner pole is slid and is arranged in the both ends inside first adjusting outer pole, while the second adjusting outer pole is fixed in first adjusting inner pole one end, and the second adjusting inner pole is slid and is arranged in the inside second adjusting outer pole, so that first adjusting outer pole, first adjusting inner pole and second adjusting inner pole respectively drive the movement of the limiting plate, thereby the different automobile box body is fixed and limited, solves the traditional fixed fixture and dismounts more complicated, often does not use fixed fixture in actual measurement, leads to the problem that the measuring accuracy appears tiny error.

Description

Technical Field

[0001] This utility model application relates to the field of automotive body technology, specifically a coordinate measuring fixture suitable for automotive front bodies. Background Technology

[0002] The automotive body refers to the rigid structural assembly in a vehicle used to house and protect key components or carry functional modules. It is usually made of metal, composite materials, or engineering plastics. According to its use, it can be divided into powertrain body, chassis body, and functional body. Its core functions include: structural support, sealing and protection, and thermal management. Modern automotive bodies tend to be lightweight and integrated, while meeting stringent durability, safety, and environmental protection standards. They are an important guarantee for the reliability and performance of the entire vehicle.

[0003] When traditional coordinate measuring machines (CMMs) measure car bodies, the variety of car body types and styles makes the disassembly and assembly of corresponding fixtures cumbersome and complex. Often, the CMMs do not provide fixed limits on the car body, which can cause slight displacement of the car body when the measuring end contacts it during measurement. This slight displacement can continue during continuous measurement, thus reducing the accuracy of the CMM's measurement of the car body. Summary of the Invention

[0004] To address the problem that traditional fixed clamps are cumbersome to assemble and disassemble, and are often not used in actual measurements, leading to minor errors in measurement accuracy, this invention provides a coordinate measuring machine fixture suitable for automotive front boxes to solve the aforementioned issues.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A coordinate measuring machine (CMM) fixture suitable for automotive front housings includes a CMM base, a CMM moving frame mounted on the base, a CMM probe mounted on the moving frame, a spacer plate fixed in the center of the base, a first lead screw rotatably mounted on the spacer plate, a first servo motor fixed on one side of the base, the output end of the first servo motor being fixedly connected to one end of the first lead screw, the threads of the first lead screws on both sides of the spacer plate having opposite directions, two moving blocks threaded onto the first lead screw, a first adjusting outer rod fixed to the top surface of each moving block, a first adjusting inner rod slidably mounted inside the first adjusting outer rod, the first adjusting outer rod moving the first adjusting inner rod via a length adjustment device, a second adjusting outer rod fixed to the end of each first adjusting inner rod away from the first adjusting outer rod, a second adjusting inner rod slidably mounted inside each second adjusting outer rod, each second adjusting outer rod moving the corresponding second adjusting inner rod via a height adjustment device, and a limit plate fixed to the top surface of each second adjusting inner rod.

[0007] Furthermore, the length adjustment device includes a second servo motor, and a second lead screw is fixed to each of the two output ends of the second servo motor. The second lead screw is threadedly connected to the first adjusting inner rod.

[0008] Furthermore, the height adjustment device includes a third servo motor, the output end of which is fixed with a third lead screw, which is threadedly connected to the second adjusting inner rod.

[0009] Furthermore, each of the limiting plates is fixed with protective side plates on both sides away from the partition plate, and each of the second adjusting inner rods is provided with an arc-shaped corner on the side near the partition plate.

[0010] Furthermore, the length of each second lead screw is the same as the length of the first adjusting inner rod, and the thread directions of the two second lead screws are opposite.

[0011] Furthermore, the length of each of the third lead screws is the same as the length of the second inner adjusting rod, and the top surface of the third lead screw is located above the top surface of the second outer adjusting rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this utility model, a first adjusting outer rod is slidably set on the top surface of the base of the coordinate measuring machine, and a first adjusting inner rod is slidably set at both ends inside the first adjusting outer rod. At the same time, a second adjusting outer rod is fixed at one end of the first adjusting inner rod, and the second adjusting inner rod is slidably set inside the second adjusting outer rod. This allows the first adjusting outer rod, the first adjusting inner rod, and the second adjusting inner rod to drive the limiting plate to move, thereby limiting and fixing different car bodies. This solves the problem that the traditional fixing fixture is cumbersome to assemble and disassemble, and is often not used in actual measurement, resulting in slight errors in measurement accuracy.

[0014] 2. In this utility model, a second servo motor is fixed in the middle of the first adjusting outer rod, and two second lead screws are fixed on the output ends of the second servo motor on both sides to drive the first adjusting inner rod to move. At the same time, the threads on the two second lead screws are opposite, so that the second servo motor drives the first adjusting inner rod to move to both sides at the same time. Meanwhile, each second adjusting outer rod is equipped with an independent third servo motor to control the height of the second adjusting inner rod, which solves the problem of the different heights of the four corners of the car body, making it impossible to fix flexibly. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram according to an embodiment of the present application;

[0017] Figure 2 yes Figure 1 The above-view three-dimensional structural diagram is shown in the embodiment.

[0018] Figure 3 yes Figure 1 The above is a three-dimensional schematic diagram of the structure viewed from below after opening in the embodiment shown.

[0019] Figure 4 yes Figure 1 The cross-sectional three-dimensional structural diagram of the adjustment device in the illustrated embodiment is shown.

[0020] The meanings of the reference numerals in the figure are as follows: 1. Coordinate measuring machine base; 2. Coordinate measuring machine moving frame; 3. Coordinate measuring probe; 4. Spacer plate; 5. First lead screw; 6. First servo motor; 7. Moving block; 8. First adjusting outer rod; 9. Second servo motor; 10. Second lead screw; 11. First adjusting inner rod; 12. Second adjusting outer rod; 13. Third servo motor; 14. Third lead screw; 15. Second adjusting inner rod; 16. Limit plate. Detailed Implementation

[0021] To make the purpose, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A coordinate measuring machine (CMM) fixture suitable for automotive front body panels includes a CMM base 1, a CMM moving frame 2 mounted on the CMM base 1, a CMM measuring probe 3 mounted on the CMM moving frame 2, a partition plate 4 fixed in the center of the CMM base 1, a first lead screw 5 rotatably mounted on the partition plate 4, a first servo motor 6 fixed on one side of the CMM base 1, the output end of the first servo motor 6 being fixedly connected to one end of the first lead screw 5, the threads of the first lead screw 5 on both sides of the partition plate 4 having opposite directions, and two moving blocks 7 threadedly connected to the first lead screw 5, each moving block... Each block 7 has a first adjusting outer rod 8 fixed on its top surface. A first adjusting inner rod 11 is slidably arranged inside the first adjusting outer rod 8. The first adjusting outer rod 8 drives the first adjusting inner rod 11 to move through a length adjusting device. A second adjusting outer rod 12 is fixed at the end of each first adjusting inner rod 11 away from the first adjusting outer rod 8. A second adjusting inner rod 15 is slidably arranged inside each second adjusting outer rod 12. Each second adjusting outer rod 12 drives the corresponding second adjusting inner rod 15 to move through a height adjusting device. A limit plate 16 is fixed on the top surface of each second adjusting inner rod 15, so that the limit plate 16 clamps and fixes the car body.

[0023] Specifically, each limiting plate 16 has protective side plates fixed on both sides away from the partition plate 4, and each second adjusting inner rod 15 has an arc-shaped corner on the side near the partition plate 4 to increase the fixing range of the limiting plate 16.

[0024] As an optimization solution, such as Figure 1 , Figure 2, Figure 3 and Figure 4 As shown, the length adjustment device includes a second servo motor 9. Both output ends of the second servo motor 9 are fixed with second lead screws 10. The second lead screws 10 are threadedly connected to the first adjusting inner rod 11. The length of each second lead screw 10 is the same as the length of the first adjusting inner rod 11. The thread directions of the two second lead screws 10 are opposite, so that the first adjusting inner rods 11 at both ends move simultaneously.

[0025] Specifically, the height adjustment device includes a third servo motor 13, and a third lead screw 14 is fixed to the output end of the third servo motor 13. The third lead screw 14 is threadedly connected to the second inner adjustment rod 15. The length of each third lead screw 14 is the same as the length of the second inner adjustment rod 15. The top surface of the third lead screw 14 is located above the top surface of the second outer adjustment rod 12 to prevent the second inner adjustment rod 15 from coming out of the second outer adjustment rod 12.

[0026] Working principle: By placing the car body on the top surface of the coordinate measuring machine base 1, the first servo motor 6 is started, causing the first lead screw 5 to rotate. The lead screw 5 then moves two moving blocks 7 simultaneously towards the partition plate 4. The moving blocks 7 then move the first adjusting outer rod 8 to clamp and fix the sides of the car body. Simultaneously, the second servo motor 9 is started, causing the second lead screw 10 to rotate. The second lead screw 10 then moves the first adjusting inner rod 11 inside the first adjusting outer rod 8, causing the first adjusting inner rod 11 to move the second adjusting outer rod 12 to the positions where they mate at the four corners of the car body. At this point, the third servo motor 13 inside each of the second adjusting outer rods 12 is started, causing the third servo motor 13 to rotate the third lead screw 14. The third lead screw 14 then moves the second adjusting inner rod 15, causing the second adjusting inner rod 15 to move and bring the limiting plate 16 into contact with the four corners of the top surface of the car body, thus clamping and fixing the car body.

[0027] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A coordinate measuring fixture for automobile front body, comprising a coordinate measuring machine base (1), a coordinate measuring machine moving frame (2) mounted on the coordinate measuring machine base (1), and a coordinate measuring probe (3) mounted on the coordinate measuring machine moving frame (2), characterized in that: A partition plate (4) is fixed in the middle of the base (1) of the coordinate measuring machine. A first lead screw (5) is rotatably mounted on the partition plate (4). A first servo motor (6) is fixed on one side of the base (1). The output end of the first servo motor (6) is fixedly connected to one end of the first lead screw (5). The threads of the first lead screws (5) on both sides of the partition plate (4) are opposite. Two moving blocks (7) are threaded onto the first lead screw (5). A first adjusting rod (8) is fixed on the top surface of each moving block (7). The first adjusting rod (8) is located inside... The first adjusting inner rod (11) is slidably provided in the part. The first adjusting outer rod (8) drives the first adjusting inner rod (11) to move through the length adjusting device. A second adjusting outer rod (12) is fixed at the end of each first adjusting inner rod (11) away from the first adjusting outer rod (8). A second adjusting inner rod (15) is slidably provided inside each second adjusting outer rod (12). Each second adjusting outer rod (12) drives the corresponding second adjusting inner rod (15) to move through the height adjusting device. A limit plate (16) is fixed on the top surface of each second adjusting inner rod (15).

2. A coordinate measuring fixture for automobile front housings according to claim 1, characterized in that: The length adjustment device includes a second servo motor (9), and the two output ends of the second servo motor (9) are fixed with a second lead screw (10), and the second lead screw (10) is threadedly connected to the first adjusting inner rod (11).

3. A coordinate measuring fixture for automobile front housings according to claim 1, characterized in that: The height adjustment device includes a third servo motor (13), and a third lead screw (14) is fixed at the output end of the third servo motor (13). The third lead screw (14) is threadedly connected to the second adjusting inner rod (15).

4. A coordinate measuring fixture suitable for automobile front housings according to claim 1, characterized in that: Each of the limiting plates (16) is fixed with protective side plates on both sides away from the partition plate (4), and each of the second adjusting inner rods (15) is provided with an arc-shaped corner on the side near the partition plate (4).

5. A coordinate measuring fixture suitable for automobile front housings according to claim 2, characterized in that: The length of each of the second lead screws (10) is the same as the length of the first adjusting inner rod (11), and the thread directions of the two second lead screws (10) are opposite.

6. A coordinate measuring fixture suitable for automobile front housings according to claim 3, characterized in that: The length of each of the third lead screws (14) is the same as the length of the second inner adjusting rod (15), and the top surface of the third lead screw (14) is located above the top surface of the second outer adjusting rod (12).

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