Combined testing tool for a base

Abstract

The utility model discloses a kind of combined gauges of base, the lower part of base is equipped with reference surface and reference hole, installation arm is equipped on base, the side of installation arm is equipped with several assembly holes, combined gauge includes bottom plate, positioning seat is equipped on bottom plate, positioning face that can be butted with reference surface is equipped on positioning seat, positioning column is also equipped on positioning seat, the position of bottom plate corresponding installation arm is also equipped with calibration seat, calibration rod that can be inserted assembly hole to thereby inspect assembly hole hole position is movably connected on calibration seat, it can be positioned according to the process reference of base itself strictly, ensure the attitude of base in detection process and actual assembly state are consistent, effectively avoid the misjudgment caused by clamping error, improve detection precision and reliability.Positioning function and calibration function are integrated on the same bottom plate, positioning of base reference system and position degree inspection of multiple assembly holes can be completed by once clamping, without multiple replacement gauge or adjusting workpiece position, greatly shorten detection time.

Description

Technical Field

[0001] This utility model relates to the field of metal parts inspection technology, and in particular to a combined inspection fixture for a base. Background Technology

[0002] In the manufacturing of engineering machinery and automation equipment, base-type structural components are widely used to support, connect, or position other functional parts. These bases typically have stringent geometric accuracy requirements, especially the datum surface at their base and the datum hole penetrating it. These serve as the technological datum for the entire part's machining and assembly, and are crucial for the positioning consistency of subsequent processes. Furthermore, the base often features a rearward-extending mounting arm with multiple mounting holes on its side for bolt or pin connections. The positional accuracy, spacing, and angular deviations of these mounting holes relative to the datum system directly affect the overall assembly accuracy and operational reliability of the machine.

[0003] To ensure the base meets design requirements, its key features must be efficiently and accurately inspected during production. Currently, the most commonly used inspection methods in the industry include coordinate measuring machine (CMM) inspection. While CMMs offer high precision and full-dimensional analysis capabilities, they suffer from drawbacks such as high equipment investment, long inspection cycles, and the need for specialized operators, making them unsuitable for rapid sampling or 100% online inspection scenarios on production lines. Traditional inspection fixtures often employ single-function designs, such as verifying the position of a reference hole using a locating pin, or using a fixed go / no-go gauge to inspect a single assembly hole. These methods fail to simultaneously perform comprehensive position verification of multiple assembly holes using a unified reference surface / reference hole within the same inspection fixture. Consequently, the inspection results do not accurately reflect the fit performance of the parts in their actual assembled state.

[0004] This utility model is based on the above-mentioned circumstances. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide an integrated, efficient, and practically logical combination inspection fixture for the base.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0007] A combined inspection fixture for a base includes a reference surface and a reference hole penetrating the reference surface at the lower part of the base. The base has a rearwardly extending mounting arm with several assembly holes on its side. The combined inspection fixture includes a base plate with a positioning seat. The positioning seat has a positioning surface that abuts against the reference surface and a positioning post that extends from the positioning surface and inserts into the reference hole. A verification seat is also provided on the base plate corresponding to the position of the mounting arm, and a verification rod that can be inserted into the assembly hole to verify the hole position is movably connected to the verification seat.

[0008] As described above, a combination fixture for a base has a first clamping clamp on the base plate that can press the base down from top to bottom.

[0009] As described above, a combination inspection fixture for a base has two mounting arms spaced apart on the left and right sides. Each mounting arm has a set of assembly holes. A calibration seat is provided on the base corresponding to the position of each mounting arm. Each calibration seat is movably connected to a calibration rod that can be inserted into the assembly hole of the mounting arm to check the position of the assembly hole.

[0010] As described above, in a combination fixture for a base, the positioning base is provided with a vertical guide hole, the positioning post is slidably connected to the guide hole, and the positioning post is connected to an elastic element that can apply an upward pushing force to it, so that the upper end of the positioning post can be kept protruding from the guide hole.

[0011] As described above, a combination fixture for a base includes a guide hole comprising a first hole segment and a second hole segment located below the first hole segment. The diameter of the second hole segment is larger than the diameter of the first hole segment to form a limiting step between them. The lower part of the positioning post is provided with a limiting block to restrict its disengagement from the second hole segment. The size of the limiting block is larger than the diameter of the first hole segment.

[0012] As described above, a combination fixture for a base has a positioning hole on the positioning surface and a positioning pin on the reference surface that can extend into the positioning hole.

[0013] As described above, the base assembly fixture further includes a support block for lifting the mounting arm on the base plate, and a second clamping clamp for pressing the mounting arm from top to bottom on the base plate.

[0014] As described above, in a combination fixture for a base, each of the mounting arms has two mounting holes, the line connecting the centers of the two mounting holes forms an angle α with the base plate, two calibration rods are movably connected to the calibration seat, and an adjustment block is provided between the calibration seat and the base plate to adjust the inclination between the calibration seat and the base plate to accommodate the two mounting holes with different angles α.

[0015] As described above, in a combination fixture with a base, the cross-section of the adjusting block is triangular or trapezoidal, and the adjusting block is provided with an installation slope for mounting the calibration seat. The base plate, the adjusting block, and the calibration seat are fixedly connected by threaded fasteners.

[0016] As described above, in a combination fixture for a base, a shim for adjusting the height of the positioning surface is provided between the positioning seat and the base plate.

[0017] The beneficial effects of this utility model are as follows: By setting a positioning surface on the positioning base that fits against the base reference surface and a positioning post extending from the positioning surface and inserted into the reference hole, positioning can be strictly based on the base's own process reference, ensuring that the base's posture during the inspection process is consistent with the actual assembly state, effectively avoiding misjudgments caused by clamping errors, and improving inspection accuracy and reliability. Integrating the positioning and verification functions onto the same base plate, the positioning of the base reference system and the positional inspection of multiple assembly holes can be completed in a single clamping operation, eliminating the need for multiple changes of fixtures or adjustments to the workpiece position, significantly shortening inspection time, and making it suitable for rapid sampling inspection or batch full inspection scenarios on production lines.

[0018] The calibration rod is movably connected to the calibration seat and can be flexibly inserted into the assembly holes on the side of the mounting arm. Whether the hole position is qualified can be intuitively judged by whether it is inserted smoothly. No complicated instruments or professional training are required, making it easy for on-site operators to quickly master and use.

[0019] The inspection fixture is positioned using the base's reference surface and reference hole as the sole constraint, accurately replicating the base's installation reference relationship within the entire machine. Inspecting the position of the assembly holes under these conditions better reflects the fit performance of the parts in actual assembly, thus improving the effectiveness of quality control. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the base of this utility model installed on the combined inspection fixture;

[0021] Figure 2 This is a structural schematic diagram of the base and combined inspection fixture in this utility model;

[0022] Figure 3 This is an exploded view of the combined inspection fixture of this utility model;

[0023] Figure 4 This is a cross-sectional schematic diagram of the combined inspection fixture of this utility model;

[0024] Figure 5 This is a schematic diagram of the base structure in this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the calibration seat and the base plate in this utility model, in which an adjustment block is provided. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indicator will also change accordingly. Furthermore, descriptions involving "preferred," "second-preferred," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "preferred" or "second-preferred" may explicitly or implicitly include at least one of those features.

[0028] like Figures 1 to 6 The illustrated fixture includes a base 1 with a reference surface 10 and a reference hole 11 penetrating the reference surface 10 at its lower part. The base 1 has a rearwardly extending mounting arm 12, and the side of the mounting arm 12 has several assembly holes 13. The fixture includes a base plate 2, a positioning seat 3 on the base plate 2, a positioning surface 30 on the positioning seat 3 that can abut against the reference surface 10, and a positioning post 4 on the positioning seat 3 that can extend from the positioning surface 30 and be inserted into the reference hole 11. A verification seat 5 is also provided on the base plate 2 at the position corresponding to the mounting arm 12. A verification rod 6 is movably connected to the verification seat 5 and can be inserted into the assembly hole 13 to check the position of the assembly hole 13.

[0029] This invention features a positioning surface 30 that aligns with the reference surface 10 of the base 1 and a positioning post 4 that inserts into the reference hole 11 on the positioning seat 3. This allows for precise positioning based on the base 1's own process reference, accurately replicating the overall assembly state and ensuring consistent testing posture while avoiding clamping errors. Simultaneously, positioning and verification functions are integrated into the same base plate 2. A single clamping operation can complete reference positioning and positional verification of multiple assembly holes 13 without requiring tool changes or workpiece adjustments, significantly improving testing efficiency. It is suitable for rapid sampling or batch full inspection on production lines. The verification rod 6 is movably connected to the verification seat 5 and can be flexibly inserted into each assembly hole 13. Whether the insertion is successful allows for intuitive judgment of hole position qualification. The operation is simple, requiring no complex instruments or professional training, effectively improving testing accuracy, reliability, and on-site applicability.

[0030] In some embodiments, the positioning seat 3 is connected to the base plate 2 by threaded fasteners, and the calibration seat 5 is connected to the base plate 2 by threaded fasteners. The calibration seat 5 is provided with an insertion hole for the calibration rod 6 to be inserted, thereby making the calibration rod 6 movably connected to the calibration seat 5. Alternatively, the calibration rod 6 can also be threadedly connected to the calibration seat 5.

[0031] Furthermore, the base plate 2 is provided with a first clamping clamp 71 that can press the base 1 from top to bottom. The first clamping clamp 71 can be a common quick clamp available on the market. The first clamping clamp 71 applies a vertically downward clamping force to the base 1 from above, effectively preventing the base 1 from tilting, slipping, or slightly displacing during the testing process due to external disturbances, resistance to the insertion of the calibration rod 6, or operational vibrations. This ensures that the base 1 remains tightly fitted to the positioning surface 30 on the positioning seat 3 and that the positioning post 4 is securely inserted into the reference hole 11, improving testing reliability.

[0032] Furthermore, the base 1 is provided with two mounting arms 12 spaced apart on the left and right, and each mounting arm 12 is provided with a set of assembly holes 13. The base 1 is provided with a calibration seat 5 corresponding to the position of each mounting arm 12, and each calibration seat 5 is movably connected with a calibration rod 6 that can be inserted into the assembly hole 13 of the mounting arm 12 to check the position of the assembly hole 13.

[0033] Two calibration seats 5 and their corresponding calibration rods 6 can simultaneously inspect the position of the assembly holes 13 on the left and right mounting arms 12, eliminating the need for multiple clamping or moving of the fixtures. This achieves "one-time positioning and double-sided calibration," significantly shortening the inspection time for a single piece and making it particularly suitable for rapid quality control in high-cycle production lines. Each calibration seat 5 and its calibration rod 6 are independently set up and can be specifically designed according to the specific structure of each mounting arm 12 and the layout of the assembly holes 13, avoiding interference or insufficient compatibility issues caused by sharing a calibration mechanism and ensuring that each set of assembly holes can be accurately and reliably inspected.

[0034] In some embodiments, the positioning base 3 is provided with a vertical guide hole, the positioning post 4 is slidably connected to the guide hole, and the positioning post 4 is connected to an elastic member 40 that can apply an upward pushing force to it, so that the upper end of the positioning post 4 can be kept protruding from the guide hole.

[0035] The positioning pin 4 can float up and down under the action of the elastic element 40. When the base 1 is placed on the fixture, if there is a slight positional deviation or height difference between its reference hole 11 and the positioning pin 4, the positioning pin 4 can be pressed down by the base 1 and retracted moderately along the guide hole. Then, under the action of elastic force, it automatically aligns and inserts into the reference hole 11. This "flexible positioning" mechanism effectively avoids the problems of forced insertion, jamming, or even damage to the reference hole 11 caused by manufacturing or assembly errors of the traditional rigid positioning pin 4. The floating positioning structure can absorb the impact and interference during the assembly process, prevent hard collisions from crushing the edge of the reference hole 11 of the base 1 or wearing the head of the positioning pin 4, and extend the service life of the workpiece and the fixture. It is especially suitable for batch frequent inspection scenarios.

[0036] Furthermore, the guide hole includes a first hole segment 311 and a second hole segment 312 located below the first hole segment 311. The diameter of the second hole segment 312 is larger than the diameter of the first hole segment 311 so that a limiting step is formed between them. The lower part of the positioning post 4 is provided with a limiting block 41 to restrict its disengagement from the second hole segment 312. The size of the limiting block 41 is larger than the diameter of the first hole segment 311.

[0037] The cooperation between the limiting block 41 and the limiting step effectively prevents the positioning post 4 from completely popping out of the guide hole or accidentally falling off under the thrust of the elastic element 40 or the action of external operating force, ensuring the structural integrity of the inspection tool during frequent use, handling, or maintenance, and avoiding detection failure or safety accidents due to lost or misaligned parts. The first hole section 311 serves as a guide section, ensuring the coaxiality and straightness of the positioning post 4 when sliding up and down; the second hole section 312 provides sufficient room for the limiting block 41 to move smoothly during the compression / extension of the elastic element 40. The limiting step naturally limits the maximum extension position of the positioning post 4, avoiding overextension that could cause skewness or jamming, thereby maintaining stable positioning accuracy. The limiting block 41 and the positioning post 4 are an integral structure.

[0038] In some embodiments, the positioning surface 30 is provided with a positioning hole 32, and the reference surface 10 is provided with a positioning pin 101 that can extend into the positioning hole 32, thereby further constraining the degree of freedom of movement and rotation of the base 1 in the horizontal plane and greatly improving the clamping stability.

[0039] In some embodiments, the base plate 2 is further provided with a support block 73 for supporting the mounting arm 12, and the base plate 2 is also provided with a second clamping clamp 72 that can press the mounting arm 12 down from top to bottom. If the mounting arm 12 has slight shaking or elastic rebound during testing, it may cause the insertion of the verification rod 6 to be obstructed or stuck, affecting the judgment. By using the "bottom support and top pressure" clamping method, the mounting arm 12 is completely fixed, eliminating gaps and vibrations, ensuring that the verification rod 6 can be smoothly and consistently inserted into the assembly hole 13 each time, improving the accuracy and repeatability of the pass / fail judgment. The second clamping clamp 72 can be a common quick clamp on the market.

[0040] In some embodiments, each mounting arm 12 is provided with two mounting holes 13, and the line connecting the centers of the two mounting holes 13 forms an angle α with the base plate 2. Two calibration rods 6 are movably connected to the calibration seat 5. An adjustment block 8 is provided between the calibration seat 5 and the base plate 2 to adjust the inclination between the calibration seat 5 and the base plate 2, thereby adapting to the two mounting holes 13 with different angles α. By providing replaceable or adjustable adjustment blocks 8, the inclination angle of the calibration seat 5 can be flexibly adjusted according to the layout of the mounting holes 13 of different models of base 1. The same set of inspection tools can be used to inspect various base 1 products with similar structures but different hole inclination angles, significantly reducing the number of dedicated inspection tools and lowering the enterprise's tooling investment costs. This is particularly suitable for scenarios involving product serialization and platform-based production.

[0041] Furthermore, the cross-section of the adjusting block 8 is triangular or trapezoidal, and the adjusting block 8 is provided with an installation inclined surface 81 for mounting the calibration seat 5. The base plate 2, the adjusting block 8, and the calibration seat 5 are fixedly connected by threaded fasteners.

[0042] In some embodiments, a shim 9 for adjusting the height of the positioning surface 30 is provided between the positioning seat 3 and the base plate 2. When the same fixture needs to be adapted to multiple similar base 1 models with slightly different heights of the reference surface 10, only the corresponding thickness or number of shims 9 need to be replaced to quickly complete the fixture parameter adjustment without reprocessing the positioning seat 3 or the base plate 2. This modular adjustment method significantly enhances the fixture's compatibility with multiple varieties and variations of products, and reduces the number of special tooling and development costs. Correspondingly, the height of the first clamping clamp 71 can also be changed by providing a shim 9 between the first clamping clamp 71 and the base plate 2.

[0043] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A combined inspection fixture for a base, wherein the lower part of the base (1) is provided with a reference surface (10) and a reference hole (11) penetrating the reference surface (10), and the base (1) is provided with a rearwardly extending mounting arm (12), and the side of the mounting arm (12) is provided with a plurality of assembly holes (13), characterized in that: The combined inspection fixture includes a base plate (2), a positioning seat (3) on the base plate (2), a positioning surface (30) on the positioning seat (3) that can abut against the reference surface (10), a positioning post (4) on the positioning seat (3) that can extend from the positioning surface (30) and be inserted into the reference hole (11), a verification seat (5) on the base plate (2) corresponding to the position of the mounting arm (12), and a verification rod (6) that can be inserted into the assembly hole (13) to check the position of the assembly hole (13) is movably connected to the verification seat (5).

2. The combined inspection fixture for a base according to claim 1, characterized in that: The base plate (2) is provided with a first clamping clamp (71) that can press the base (1) from top to bottom.

3. The combined inspection fixture for a base according to claim 2, characterized in that: The base (1) has two mounting arms (12) spaced apart on the left and right. Each mounting arm (12) has a set of assembly holes (13). The base (1) has a calibration seat (5) corresponding to the position of each mounting arm (12). Each calibration seat (5) is movably connected to a calibration rod (6) that can be inserted into the assembly hole (13) of the mounting arm (12) to check the position of the assembly hole (13).

4. The combined inspection fixture for a base according to claim 3, characterized in that: The positioning seat (3) is provided with a vertical guide hole, and the positioning post (4) is slidably connected to the guide hole. The positioning post (4) is connected to an elastic element (40) that can apply an upward pushing force to it, so that the upper end of the positioning post (4) can be kept protruding from the guide hole.

5. A combined inspection fixture for a base according to claim 4, characterized in that: The guide hole includes a first hole segment (311) and a second hole segment (312) located below the first hole segment (311). The diameter of the second hole segment (312) is larger than the diameter of the first hole segment (311) so that a limiting step is formed between them. The lower part of the positioning post (4) is provided with a limiting block (41) to restrict its disengagement from the second hole segment (312). The size of the limiting block (41) is larger than the diameter of the first hole segment (311).

6. A combined inspection fixture for a base according to claim 5, characterized in that: The positioning surface (30) is provided with a positioning hole (32), and the reference surface (10) is provided with a positioning pin (101) that can extend into the positioning hole (32).

7. A combined inspection fixture for a base according to claim 6, characterized in that: The base plate (2) is also provided with a support block (73) for supporting the mounting arm (12), and the base plate (2) is also provided with a second clamping clamp (72) that can press the mounting arm (12) from top to bottom.

8. A combination gauge for a base according to any one of claims 1-7, characterized in that: Each of the mounting arms (12) is provided with two mounting holes (13). The angle between the line connecting the centers of the two mounting holes (13) and the base plate (2) is α. Two calibration rods (6) are movably connected to the calibration seat (5). An adjustment block (8) is provided between the calibration seat (5) and the base plate (2) to adjust the inclination between the calibration seat (5) and the base plate (2) to adapt to the two mounting holes (13) with different angles α.

9. A combined inspection fixture for a base according to claim 8, characterized in that: The cross-section of the adjusting block (8) is triangular or trapezoidal. The adjusting block (8) is provided with an installation slope (81) for the installation of the calibration seat (5). The base plate (2), the adjusting block (8) and the calibration seat (5) are fixedly connected by threaded fasteners.

10. A combination gauge for a base according to any one of claims 1-7, characterized in that: A shim (9) for adjusting the height of the positioning surface (30) is provided between the positioning seat (3) and the base plate (2).

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