Box part space plane size testing fixture

Abstract

The application discloses a box part space plane size detection tool, and relates to the technical field of box part plane space size detection. The application discloses a box part space plane size detection tool, and relates to the technical field of box part plane space size detection. The application has the effects of accurately detecting the space plane size of the box part, accurately positioning, conveniently measuring, and detachably mounting the components, thereby facilitating maintenance and replacement.

Description

Technical Field

[0001] This application relates to the field of spatial planar dimension inspection technology for box-type parts, and in particular to a spatial planar dimension inspection tool for box-type parts. Background Technology

[0002] In today's booming automotive industry, the quality and performance of the power battery, as a core component of electric vehicles, directly impacts the overall performance of these vehicles. The manufacturing quality of the power battery housing components is crucial for the assembly of the battery modules and the stable operation of the entire power system. In particular, the dimensional accuracy of the spatial distances between several key positioning surfaces and locating pins of the housing has a significant impact on the assembly quality of the battery modules and the stability of system operation.

[0003] Currently, the industry commonly uses coordinate measuring machines (CMMs) to measure the spatial dimensions between key positioning surfaces and locating pins of automotive power battery box components. CMMs offer high precision and multi-degree-of-freedom measurement capabilities. They acquire three-dimensional coordinate data of points on the surface of the object being measured via probes, and then use specialized software for data processing and dimensional calculations to obtain the required spatial distance information. This method is widely used in quality inspection processes for automotive parts, aerospace components, and precision molds, and its maturity has been recognized by the industry.

[0004] However, current coordinate measuring machines (CMMs) have several limitations: They are high-precision instruments with high purchase and maintenance costs. Not only is the equipment price high, but special environmental conditions such as constant temperature and humidity are required to ensure measurement accuracy, increasing companies' fixed asset investment and operating costs. Their operation is demanding, requiring professionally trained technicians. The measurement process is cumbersome, and each batch of products takes a long time to inspect, making it difficult to meet the real-time inspection needs of mass production. Furthermore, CMMs are bulky and typically housed in dedicated inspection rooms, making them difficult to integrate into production lines for real-time feedback and closed-loop control, impacting production efficiency and automation levels. In addition, due to the influence of probe contact methods, contact force errors may occur during measurement, requiring regular calibration. Failure to maintain this system in a timely manner may introduce systematic errors, affecting the reliability of the inspection results. Utility Model Content

[0005] To address the issues of high cost, inconvenient operation, poor flexibility, unsuitability for production line integration, and impact on the reliability of test results, this application provides a spatial planar dimension inspection tool for box-type parts.

[0006] The spatial planar dimension inspection tool for box-shaped parts provided in this application adopts the following technical solution:

[0007] A spatial planar dimension gauge for a box-shaped part includes a positioning device for positioning and machining the box-shaped part and a gantry-type spatial support structure mounted on the positioning device. The positioning device includes a positioning plate for supporting and placing the box-shaped part and positioning blocks symmetrically arranged on the positioning plate. The positioning plate and the bottom end of the box-shaped part are positioned by one side and two pins. The three-dimensional space formed by the gantry-type spatial support structure is larger than the three-dimensional space of the box-shaped part. The two sides of the gantry-type spatial support structure are in contact with the right-angled edges formed by the positioning blocks. A measuring structure for measuring the box-shaped part is detachably mounted on the gantry-type spatial support structure.

[0008] By adopting the above technical solution, the positioning plate in the positioning device uses a one-sided two-pin positioning system with the bottom of the box-shaped part, ensuring that the box-shaped part is completely positioned on the positioning plate and guaranteeing the accuracy of the positioning. The symmetrically arranged positioning blocks on the positioning plate provide a positioning reference for the gantry-type spatial support structure. The three-dimensional space formed by the gantry-type spatial support structure is larger than the three-dimensional space of the box-shaped part, which can completely accommodate the box-shaped part inside, facilitating measurement. The right-angled edges formed by its two sides and the positioning blocks ensure the accurate installation of the gantry-type spatial support structure on the positioning device. The detachable measuring structure installed on the gantry-type spatial support structure facilitates the measurement of different box-shaped parts and can be disassembled and stored when not in use, improving the flexibility of the inspection tool. Overall, through the cooperation of its various parts, this inspection tool achieves effective measurement of the spatial planar dimensions of the box-shaped part, reducing inspection costs and shortening the inspection cycle compared to traditional coordinate measuring machines.

[0009] Optionally, the gantry-type space support structure includes an optical axis mounted on a positioning plate, an end plate mounted on the end of the optical axis away from the positioning plate, and a U-shaped plate mounted in the middle of the optical axis. The optical axis and the end plate are connected by a locking device, and the end of the optical axis contacts the right-angle edge formed by the positioning block.

[0010] By adopting the above technical solution, the optical axis is mounted on the positioning plate, providing a supporting foundation for the entire gantry-type spatial support structure. A U-shaped plate is installed in the middle of the optical axis, enhancing its rigidity and precision. The optical axis and end plate are connected by locking components, ensuring a secure connection and structural stability. The right-angle contact between the end of the optical axis and the positioning block achieves accurate alignment between the gantry-type spatial support structure and the positioning device.

[0011] Optionally, the optical axes are arranged in a triangular shape on the positioning plate, with one optical axis contacting both sides of the right-angled side of the positioning block, another optical axis contacting one side of the right-angled side of the positioning block, and the remaining optical axis installed on the side edge of the positioning plate.

[0012] By adopting the above technical solution, the stable triangular structure enhances the overall stability of the gantry-type spatial support structure. The optical axis achieves accurate positioning with the positioning block, ensuring precise alignment during fixture measurement and preventing over-positioning. The stable structure and accurate positioning effectively improve the accuracy and reliability of the fixture when measuring the spatial planar dimensions of box-shaped parts, ensuring consistent measurement results, while also enhancing the overall rigidity and precision of the fixture.

[0013] Optionally, the locking component includes a locking bolt, and a threaded hole is provided on the side of the end plate. The locking bolt passes through the threaded hole and abuts against the outer surface of the optical axis.

[0014] By adopting the above technical solution, when connecting the optical axis to the end plate, the threaded hole on the side of the end plate is used to allow the locking bolt to pass through the threaded hole and abut against the outer surface of the optical axis, which can firmly fix the optical axis to the end plate, ensuring the stability of the gantry-type space support structure, thereby ensuring the stability of the overall structure of the inspection fixture, and helping to improve the accuracy and reliability of measuring the spatial plane dimensions of the box parts.

[0015] Optionally, the measuring structure includes a lever holder mounted on the end plate, a fixing bolt passing through the side of the end plate, and a lever mounted on the lever holder. The lever holder and the end plate are clearance-fitted, and the fixing bolt passes through the end plate and abuts against the outer surface of the lever holder.

[0016] By adopting the above technical solution, the lever holder can be adjusted in position on the end plate to adapt to the measurement needs of different box-shaped parts. Using fixing bolts that pass through the side of the end plate and abut against the outer surface of the lever holder, the adjusted lever holder can be fixed to the end plate, ensuring the stability of the lever holder's position during measurement. The fixture allows for convenient and flexible measurement of box-shaped parts, improving measurement accuracy and efficiency, while reducing measurement costs and simplifying the operation process.

[0017] Optionally, the positioning block is L-shaped, square, or U-shaped, and a positioning hole is provided on the positioning block, through which a bolt and a positioning plate pass and are fastened.

[0018] By adopting the above technical solution, appropriate positioning blocks can be flexibly selected according to the positioning requirements of different box-shaped parts, meeting diverse positioning scenarios. The bolted fastening of the positioning plate and positioning block ensures the stability of the connection between them, guaranteeing that the positioning block will not shift when measuring the spatial planar dimensions of the box-shaped parts, thereby ensuring positioning accuracy and providing a stable and reliable foundation for subsequent precise measurement of the spatial planar dimensions of the box-shaped parts.

[0019] Optionally, the positioning plate is provided with cylindrical pin holes and diamond pin holes, which respectively cooperate with the cylindrical pins and diamond pins on the box body parts.

[0020] By adopting the above technical solution, the cylindrical pin restricts two degrees of freedom of movement of the box part, and the diamond pin restricts the other degree of freedom of movement of the box part in addition to the one degree of freedom of movement that coincides with the cylindrical pin. This achieves complete positioning of the box part on the positioning plate, ensuring the accuracy and stability of the box part's positioning on the fixture, which is beneficial for the subsequent accurate measurement of the spatial dimensions of the box part.

[0021] Optionally, the end plate is a T-shaped plate or an I-shaped plate.

[0022] By adopting the above technical solution, the three ends of the T-shaped plate can be used to connect with the optical axis, enabling connection and fixation operations in the vertical direction and on the side, facilitating the fixed connection with the optical axis. The square hole in the middle of the T-shaped plate can be fitted with the lever frame with clearance and its height position can be adjusted. The I-shaped plate also has a similar regular shape and operable connection parts, which is conducive to the cooperation with the optical axis and the measuring structure. This enables stable connection and cooperation with components such as the optical axis, ensuring the stability of the gantry-type spatial support structure. In turn, it ensures that the entire fixture can accurately measure the spatial planar dimensions of the box parts, improving the accuracy and reliability of the measurement.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The spatial dimensions of box-shaped parts are measured by using a positioning device and a gantry-type spatial support structure, which can reduce inspection costs while ensuring measurement accuracy and avoid the problem of high cost of coordinate measuring machine equipment;

[0025] 2. The inspection tool is relatively simple to operate and can quickly complete the inspection of the spatial dimensions of box parts, shortening the inspection cycle and solving the problem of high operating threshold and long cycle of coordinate measuring machine;

[0026] 3. This inspection tool is easy to promote and apply on the production site. It can be directly integrated into the production line to achieve real-time feedback and closed-loop control, which improves production efficiency and automation level, and overcomes the shortcomings of the coordinate measuring machine, such as poor flexibility and unsuitability for production line integration. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0028] Figure 1This application presents a schematic diagram of the spatial dimension inspection fixture for the box-shaped parts.

[0029] Figure 2 This is a structural schematic diagram of the positioning device and the gantry-type space support structure shown in this application.

[0030] Figure 3 This application demonstrates Figure 1 A magnified view from direction A.

[0031] Figure 4 This is a schematic diagram of the structure as shown in this application from a top-down perspective.

[0032] Figure 5 This is a schematic diagram of the overall structure from another perspective, as shown in this application.

[0033] Figure 6 This application demonstrates Figure 5 A magnified view from direction B.

[0034] Reference numerals: 1. Positioning device; 2. Gantry-type space support structure; 11. Positioning block; 12. Positioning plate; 13. Positioning pin hole; 3. Measuring structure; 21. Optical axis; 22. End plate; 23. U-shaped plate; 24. Locking component; 241. Locking bolt; 242. Threaded hole; 31. Lever gauge holder; 32. Fixing bolt; 33. Lever gauge. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail.

[0036] This application discloses a spatial planar dimension gauge for box-shaped parts.

[0037] Reference Figure 1 It includes a positioning device 1 for positioning and processing box-shaped parts and a gantry-type spatial support structure 2 installed on the positioning device 1. The positioning device 1 is used to accurately position the box-shaped parts, and the gantry-type spatial support structure 2 provides an installation base for the measuring structure 3 and cooperates with the positioning device 1 to jointly realize the measurement of the spatial dimensions of the box-shaped parts.

[0038] See Figure 2As shown, the positioning device 1 includes a positioning plate 12 for supporting and placing box-shaped parts and positioning blocks 11 symmetrically arranged on the positioning plate 12. The positioning plate 12 is made of metal and has good flatness and rigidity to ensure the stability of the box-shaped parts. The bottom ends of the positioning plate 12 and the box-shaped parts are positioned by two pins on one side. The positioning plate 12 has cylindrical pin holes and diamond pin holes, which cooperate with the cylindrical pins and diamond pins on the box-shaped parts, respectively. This positioning method can achieve complete positioning of the box-shaped parts and ensure their positional accuracy during the measurement process. The positioning blocks 11 are L-shaped, square, or U-shaped. In this embodiment, an L-shaped positioning block 11 is used as an example. The L-shaped positioning block 11 has good positioning and limiting functions. The positioning block 11 has a positioning hole through which bolts and positioning plate 12 are fastened. This allows the positioning block 11 to be firmly installed on the positioning plate 12. The positioning plate 12 provides a stable bearing platform for the box parts. The box parts are initially positioned by the one-sided two-pin positioning method, while the positioning block 11 further limits and assists in positioning the box parts, ensuring that the box parts will not be displaced during the measurement process, thereby ensuring the accuracy of the measurement.

[0039] See Figure 2 and Figure 4 As shown, the gantry-type spatial support structure 2 includes an optical axis 21 mounted on the positioning plate 12, an end plate 22 mounted on the end of the optical axis 21 away from the positioning plate 12, and a U-shaped plate 23 mounted in the middle of the optical axis 21. The optical axis 21 is made of high-strength steel and has good straightness and rigidity to ensure the stability of the gantry-type spatial support structure 2. Three optical axes 21 are arranged in a triangular shape on the positioning plate 12. One optical axis 21 contacts both sides of the right angle side of the positioning block 11, another optical axis 21 contacts one side of the right angle side of the positioning block 11, and the remaining optical axis 21 is installed on the side edge of the positioning plate 12 to effectively prevent over-positioning and ensure accurate matching between the gantry-type spatial support structure 2 and the positioning device 1. The optical axis 21 and the end plate 22 are connected by a locking member 24, which includes a locking bolt 241. A threaded hole 242 is provided on the side of the end plate 22. The locking bolt 241 passes through the threaded hole 242 and abuts against the outer surface of the optical axis 21, firmly fixing the optical axis 21 to the end plate 22. The U-shaped plate 23 has through holes in its middle and at both ends, which are fixedly engaged with the three optical axes 21 respectively, enhancing the rigidity and precision of the optical axes 21. The end plate 22 is a T-shaped plate or an I-shaped plate. In this embodiment, a T-shaped plate is used as an example. Holes are provided vertically at the three ends of the T-shaped plate to be fixedly connected to the ends of the three optical axes 21 of equal length. Threaded holes 242 are provided on the sides of the three ends of the T-shaped plate, and the optical axes 21 are fixedly connected by lateral bolts.

[0040] See Figure 2As shown, the optical axis 21 serves as a support structure, providing a mounting base for the end plate 22 and the U-shaped plate 23. The end plate 22 and the U-shaped plate 23 further enhance the rigidity and stability of the optical axis 21. The contact method between the optical axis 21 and the positioning block 11 avoids over-positioning problems, ensuring accurate matching between the gantry-type spatial support structure 2 and the positioning device 1, thereby providing a stable mounting platform for the measuring structure 3.

[0041] See Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the measuring structure 3 includes a lever gauge 33 holder 31 mounted on the end plate 22, a fixing bolt 32 passing through the side of the end plate 22, and a lever gauge 33 mounted on the lever gauge 33 holder 31. The lever gauge 33 holder 31 and the end plate 22 are fitted with a clearance fit. The lever gauge 33 holder 31 can move up and down on the end plate 22 to adjust its position to meet the measurement requirements of different box-shaped parts. The fixing bolt 32 passes through the end plate 22 and abuts against the outer surface of the lever gauge 33 holder 31. Tightening the fixing bolt 32 can fix the position of the lever gauge 33 holder 31. The lever gauge 33 is fixed to the end of the lever gauge 33 holder 31 by a rotary adjustable mechanism. The combination of the up-and-down and rotary adjustable mechanism of the lever gauge 33 holder 31 achieves flexible adjustment of its spatial position. Furthermore, the lever gauge 33 holder 31 can be replaced with a universal gauge holder to increase the flexibility of the gauge. The lever gauge 33 holder 31 provides a platform for the installation and adjustment of the lever gauge 33. Through the clearance fit and the action of the fixing bolt 32, the position of the lever gauge 33 can be flexibly adjusted to meet the measurement requirements of different box-shaped parts. The combination of the rotary adjustable mechanism and the lever gauge 33 holder 31 enables flexible adjustment of the lever gauge 33 in spatial position, thereby more accurately measuring the spatial dimensions of the box parts.

[0042] The implementation principle of the spatial planar dimension gauge for a box-type part according to an embodiment of this application is as follows: The box-type part is precisely positioned using a positioning device 1, and a gantry-type spatial support structure 2 provides a stable mounting platform for the measuring structure 3. During measurement, the box-type part with known spatial dimensions is first placed on the positioning plate 12 for positioning and fixation. Then, the gantry-type spatial support structure 2 is placed on the positioning plate 12, and accurate alignment is achieved through the contact between the optical axis 21 and the positioning block 11. At this time, the readings of the lever gauge 33 holder 31 and the lever gauge 33 head are adjusted to match the known deviation of the box-type part, completing the calibration. After calibration, the gantry-type spatial support is removed, replaced with the box-type part to be measured, and the gantry-type spatial support is fixed following the same calibration steps. The deviation of the lever gauge 33 is then read to obtain the spatial dimensions of the box-type part to be measured. This measurement method avoids the use of a high-cost coordinate measuring machine, reducing inspection costs. Simultaneously, it is relatively simple to operate, meets the real-time inspection needs of mass production, and improves inspection efficiency.

[0043] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A spatial planar dimension measuring tool for box-shaped parts, characterized in that: The system includes a positioning device (1) for positioning and processing box-shaped parts and a gantry-type spatial support structure (2) mounted on the positioning device (1). The positioning device (1) includes a positioning plate (12) for supporting and placing box-shaped parts and positioning blocks (11) symmetrically arranged on the positioning plate (12). The positioning plate (12) and the bottom end of the box-shaped parts are positioned by one side and two pins. The three-dimensional space formed by the gantry-type spatial support structure (2) is larger than the three-dimensional space of the box-shaped parts. The two sides of the gantry-type spatial support structure (2) and the right-angled sides formed by the positioning blocks (11) are in contact. A measuring structure (3) for measuring the box-shaped parts is detachably installed on the gantry-type spatial support structure (2).

2. The spatial planar dimension measuring tool for box-shaped parts according to claim 1, characterized in that: The gantry-type space support structure (2) includes an optical axis (21) mounted on a positioning plate (12), an end plate (22) mounted on the end of the optical axis (21) away from the positioning plate (12), and a U-shaped plate (23) mounted in the middle of the optical axis (21). The optical axis (21) and the end plate (22) are connected by a locking member (24). The end of the optical axis (21) is in contact with the right-angle edge formed by the positioning block (11).

3. The spatial planar dimension measuring tool for box-shaped parts according to claim 2, characterized in that: The optical axis (21) is arranged in a triangular shape on the positioning plate (12). One of the optical axes (21) contacts the two sides of the right angle side of the positioning block (11), another optical axis (21) contacts one side of the right angle side of the positioning block (11), and the remaining optical axis (21) is installed on the side edge of the positioning plate (12).

4. A spatial planar dimension measuring tool for box-shaped parts according to claim 2, characterized in that: The locking component (24) includes a locking bolt (241), and a threaded hole (242) is provided on the side of the end plate (22). The locking bolt (241) passes through the threaded hole (242) and abuts against the outer surface of the optical axis (21).

5. A spatial planar dimension measuring tool for box-shaped parts according to claim 1, characterized in that: The measuring structure (3) includes a lever holder (31) mounted on an end plate (22), a fixing bolt (32) passing through the side of the end plate (22), and a lever (33) mounted on the lever holder (31). The lever holder (31) and the end plate (22) are fitted with a clearance, and the fixing bolt (32) passes through the end plate (22) and abuts against the outer surface of the lever holder (31).

6. The spatial planar dimension measuring tool for box-shaped parts according to claim 1, characterized in that: The positioning block (11) is L-shaped, square, or U-shaped. The positioning block (11) has a positioning hole through which a bolt and a positioning plate (12) pass and are fastened.

7. A spatial planar dimension measuring tool for box-shaped parts according to claim 1, characterized in that: The positioning plate (12) has cylindrical pin holes and rhomboid pin holes, which respectively cooperate with the cylindrical pins and rhomboid pins on the box body parts.

8. A spatial planar dimension measuring tool for box-shaped parts according to claim 2, characterized in that: The end plate (22) is a T-shaped plate or an I-shaped plate.

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