Anchor bolt checking tool
By designing an anchor bolt calibration tool and utilizing the structure of the seat leg beam positioning surface and the bolt positioning surface combined with the adjustment groove, the problem of inconvenient measurement of aircraft seat anchor bolts was solved, achieving efficient and accurate spacing calibration, and improving seat fixation safety and ease of operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-03-06
AI Technical Summary
In existing technologies, measuring the distance between the aircraft seat anchor bolts and the anchor beam is inconvenient and subject to human error, affecting safety and efficiency.
Design an anchor bolt calibration tool, including a calibration block body with a chair leg beam positioning surface and a bolt positioning surface. The tool achieves spacing measurement and calibration through adjustment grooves. The tool has few overall parts, is easy to operate by hand, and improves measurement efficiency and accuracy.
It improves the efficiency and accuracy of measuring the distance between anchor bolts and anchor beams, reduces human error, and ensures the safety and ease of operation of seat fixing.
Smart Images

Figure CN223976573U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of aviation inspection tools, and in particular to an anchor bolt inspection tool. Background Technology
[0002] After passengers enter the cabin, most of their activities take place in their seats, therefore, certain requirements must be placed on the seats. First and foremost, the seats must be safe and sturdy. When the aircraft accelerates, passengers are pushed backward by inertia, and the seats bear the backward pressure; conversely, when the aircraft decelerates suddenly, the seats are subjected to forward forces. If the seats are not securely fastened, it could lead to injury. Therefore, ensuring passenger safety is paramount during disassembly and installation. Following the manual to properly secure the seat feet is crucial.
[0003] According to the passenger seat manual and based on work experience, the most common cause of seat anchor loosening is damaged threads on the anchor plates, causing both the anchor plates and bolts to rotate simultaneously. This can lead to passenger injury if the seat anchors become loose. Therefore, replacing the anchor bolts is essential.
[0004] Measuring on an aircraft is inconvenient, as it's impossible to insert calipers to measure between the bolts and the anchor beam. Furthermore, the large number of seats on an aircraft means that measuring each one individually introduces the possibility of human error. Utility Model Content
[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. It provides an anchor bolt verification tool that improves the efficiency and accuracy of measuring the distance between the anchor bolt and the anchor beam.
[0006] To achieve the above objectives, this utility model provides an anchor bolt calibration tool, including a calibration block body. The calibration block body has a first end and a second end arranged opposite to each other. The first end has a chair leg beam positioning surface for contacting with the chair leg beam, and the second end has a bolt positioning surface for contacting with the anchor bolt. The chair leg beam positioning surface and the bolt positioning surface are spaced apart in the first direction and define a preset measurement distance. The bolt positioning surface is located on the side of the chair leg beam positioning surface in the second direction. The second end has an adjustment groove that penetrates the bolt positioning surface and extends along the first direction.
[0007] As a preferred embodiment, the verification block body includes a first positioning block, a second positioning block, and a connecting block. The first positioning block and the second positioning block extend along a second direction, and the connecting block extends along a first direction. The connecting block is located between the first positioning block and the second positioning block in the first direction. The first positioning block and the second positioning block are respectively connected to the connecting block. The chair leg beam positioning surface is disposed on the first positioning block, and the bolt positioning surface is disposed on the second positioning block.
[0008] As a preferred embodiment, the second positioning block is connected to the side of the connecting block away from the first positioning block in the second direction, and the second positioning block protrudes from the connecting block in the second direction to form a verification cavity, and the adjustment groove communicates with the verification cavity.
[0009] As a preferred embodiment, the first positioning block is provided with a first limiting surface and a second limiting surface, the first limiting surface and the second limiting surface are spaced apart along the third direction, the first limiting surface is connected to one end of the chair leg beam positioning surface in the third direction, and the second limiting surface is connected to the other end of the chair leg beam positioning surface in the third direction, the first limiting surface, the second limiting surface and the chair leg beam positioning surface define a chair leg beam limiting groove.
[0010] As a preferred embodiment, the first positioning block, the second positioning block, and the connecting block are integrally formed.
[0011] As a preferred embodiment, the preset measurement distance is set at 12.7 mm.
[0012] As a preferred embodiment, the adjustment slot is provided with an insertion port, which is located away from the first positioning block in the opening direction of the second direction.
[0013] Compared with existing technologies, the anchor bolt verification tool of this utility model has the following advantages: the verification block body, as the entire verification tool, has fewer parts, making it easier to operate by hand and improving operational efficiency. The first end of the verification body has a chair leg beam positioning surface, which is used to align with the chair leg beam for initial positioning during verification. The second end of the verification body has a bolt positioning surface, which serves as the positioning point for the bolt's protrusion length from the chair leg beam. A preset measurement distance is defined between the chair leg beam positioning surface and the bolt positioning surface, which is the verification distance for the bolt protruding from the chair leg beam. The bolt positioning surface is located on one side of the chair leg beam positioning surface. After the chair leg beam positioning surface is initially positioned against the chair leg beam, the bolt is located below the corresponding part of the chair leg beam positioning surface. When the end of the bolt away from the chair leg beam is lower than the bolt positioning surface, a screwdriver is inserted through the adjustment slot to connect the bolt, and the bolt is rotated and moved towards the bolt positioning surface until the bolt is aligned with the bolt positioning surface, thus completing the anchor bolt verification. The distance between two non-intersecting positioning surfaces can be checked and adjusted by using the verification block body, thereby improving the efficiency and accuracy of measuring the distance between the delivery bolt and the anchor beam. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model embodiment in use.
[0015] Figure 2 This is a schematic diagram of the rocker arm in an embodiment of the present invention.
[0016] In the picture:
[0017] 10. Verification block body; 11. First end; 12. Chair leg beam positioning surface; 13. First positioning block; 14. First limiting surface; 15. Second limiting surface; 16. Chair leg beam limiting groove; 17. Second end; 18. Bolt positioning surface; 19. Second positioning block; 20. Adjustment groove; 21. Insertion port; 22. Connecting block; 23. Verification cavity;
[0018] 30. Chair leg beam; 31. Bolt;
[0019] X, first direction; Y, second direction; Z, third direction. Detailed Implementation
[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0022] In the description of this utility model, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0023] like Figures 1 to 2 As shown, a preferred embodiment of the present invention provides a tool for checking anchor bolts 31, which has a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other. The tool includes a check block body 10, which has a first end 11 and a second end 17 that are arranged opposite to each other. The first end 11 is provided with a chair leg beam positioning surface 12 for contacting with the chair leg beam 30, and the second end 17 is provided with a bolt positioning surface 18 for contacting with the anchor bolts 31. The chair leg beam positioning surface 12 and the bolt positioning surface 18 are spaced apart in the first direction X and are defined to form a preset measurement distance. The bolt positioning surface 18 is located on one side of the chair leg beam positioning surface 12 in the second direction Y. The second end 17 is provided with an adjustment groove 20 that penetrates the bolt positioning surface 18 and extends along the first direction X.
[0024] This utility model discloses a tool for verifying anchor bolts 31. The verification block body 10 serves as the entire verification tool, with fewer components, facilitating handheld operation and improving operational efficiency. The first end 11 of the verification body has a chair leg beam positioning surface 12, which is used to contact the chair leg beam 30 for initial positioning during verification. The second end 17 of the verification body has a bolt positioning surface 18, which positions the bolt 31 protruding beyond the chair leg beam 30 by a predetermined measurement distance. This predetermined measurement distance is the verification distance of the bolt 31 protruding beyond the chair leg beam 30. The bolt positioning surface 18 is located on one side of the chair leg positioning surface. After the chair leg beam positioning surface 12 is initially positioned against the chair leg beam 30, the bolt 31 is located below the corresponding part of the chair leg positioning surface. When the end face of the bolt 31 away from the chair leg beam 30 is lower than the bolt positioning surface 18, a screwdriver is inserted into the adjusting slot 20 to engage the bolt 31. The bolt 31 is then rotated and moved toward the bolt positioning surface 18 until it is in contact with the bolt positioning surface 18, thus completing the verification of the anchor bolt 31. The verification block body 10 can be used to verify and adjust the distance between two non-intersecting positioning surfaces, improving the efficiency and accuracy of measuring the distance between the bolt 31 and the anchor beam.
[0025] Furthermore, such as Figure 2 As shown, the verification block body 10 includes a first positioning block 13, a second positioning block 19, and a connecting block 22. The first positioning block 13 and the second positioning block 19 extend along a second direction Y, and the connecting block 22 extends along a first direction X. The connecting block 22 is located between the first positioning block 13 and the second positioning block 19 in the first direction X. The first positioning block 13 and the second positioning block 19 are respectively connected to the connecting block 22. The chair leg beam positioning surface 12 is disposed on the first positioning block 13, and the bolt positioning surface 18 is disposed on the second positioning block 19. The connecting block 22 is used to connect and support the first positioning block 13 and the second positioning block 19, so that the positional relationship between the first positioning block 13 and the second positioning block 19 meets the positioning requirements of the verification, and thus forms a whole for easy use.
[0026] Furthermore, such as Figure 2 As shown, the second positioning block 19 is connected to the side of the connecting block 22 away from the first positioning block 13 in the second direction Y. The second positioning block 19 protrudes from the connecting block 22 in the second direction Y to form a verification cavity 23, and the adjustment groove 20 communicates with the verification cavity 23. The verification cavity 23 provides a space for the bolt 31 to be verified and adjusted. After the chair leg beam positioning surface 12 and the chair leg beam 30 are initially positioned in contact, the bolt 31 is located in the verification cavity 23, which facilitates the verification operation.
[0027] Furthermore, such as Figure 2As shown, the first positioning block 13 has a first limiting surface 14 and a second limiting surface 15. The first limiting surface 14 and the second limiting surface 15 are spaced apart along the third direction Z. The first limiting surface 14 is connected to one end of the chair leg beam positioning surface 12 in the third direction Z, and the second limiting surface 15 is connected to the other end of the chair leg beam positioning surface 12 in the third direction Z. The first limiting surface 14, the second limiting surface 15, and the chair leg beam positioning surface 12 define a chair leg beam limiting groove 16. When the chair leg beam 30 is in contact with the chair leg beam positioning surface 12, the chair leg beam 30 is located in the chair leg beam limiting groove 16. The chair leg beam limiting groove 16 limits the chair leg beam 30, preventing misalignment during operation and improving operational accuracy and convenience.
[0028] Furthermore, such as Figure 2 As shown, the first positioning block 13, the second positioning block 19, and the connecting block 22 are integrally formed. This integral forming eliminates the assembly process, avoiding assembly errors and thus improving overall accuracy and stability. The integral forming also provides higher rigidity, making it less prone to deformation and ensuring the accuracy of the verification results.
[0029] As one embodiment, the first positioning block 13, the second positioning block 19, and the connecting block 22 are integrally formed using a single material to ensure consistent thermal expansion and reduce the impact of temperature changes.
[0030] Furthermore, such as Figure 2 As shown, the preset measurement distance is set at 12.7mm. The distance from the front anchor bolt 31 to the surface of the chair leg beam 30 should be 12.7mm, which meets the actual verification requirements.
[0031] Furthermore, such as Figure 2 As shown, the adjustment slot 20 is provided with an insertion port 21, which is located away from the first positioning block 13 in the opening direction of the second direction Y. The insertion port 21 is provided on the side of the adjustment slot 20 away from the first positioning block 13 so that the screwdriver can be more easily inserted into the adjustment slot 20 for easier operation.
[0032] In summary, this utility model embodiment provides a tool for verifying anchor bolts 31. The verification block body 10 serves as the entire verification tool, with fewer components, facilitating handheld operation and improving operational efficiency. The first end 11 of the verification body has a chair leg beam positioning surface 12, which is used to contact the chair leg beam 30 for initial positioning during verification. The second end 17 of the verification body has a bolt positioning surface 18, which positions the bolt 31 protruding beyond the chair leg beam 30 by a predetermined measurement distance. This predetermined measurement distance is the verification distance of the bolt 31 protruding beyond the chair leg beam 30. The bolt positioning surface 18 is located on one side of the chair leg positioning surface. After the chair leg beam positioning surface 12 is initially positioned against the chair leg beam 30, the bolt 31 is located below the corresponding part of the chair leg positioning surface. When the end face of the bolt 31 away from the chair leg beam 30 is lower than the bolt positioning surface 18, a screwdriver is inserted into the adjusting slot 20 to engage the bolt 31. The bolt 31 is then rotated and moved toward the bolt positioning surface 18 until it is in contact with the bolt positioning surface 18, thus completing the verification of the anchor bolt 31. The verification block body 10 can be used to verify and adjust the distance between two non-intersecting positioning surfaces, improving the efficiency and accuracy of measuring the distance between the bolt 31 and the anchor beam.
[0033] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.
Claims
1. An anchor checking tool having a first direction, a second direction and a third direction perpendicular to each other, characterized in that: The check block body has oppositely arranged first and second ends, the first end is provided with a chair leg beam positioning surface for abutting with the chair leg beam, the second end is provided with a bolt positioning surface for abutting with the anchor bolt, the chair leg beam positioning surface and the bolt positioning surface are arranged at intervals in the first direction and define a preset measurement distance, the bolt positioning surface is located on one side of the chair leg beam positioning surface in the second direction, and the second end is provided with an adjusting groove penetrating through the bolt positioning surface and extending along the first direction.
2. An anchor bolt verification tool according to claim 1, wherein: The check block body includes a first positioning block, a second positioning block and a connecting block, the first positioning block and the second positioning block extend along the second direction, the connecting block extends along the first direction, the connecting block is located between the first positioning block and the second positioning block in the first direction, the first positioning block and the second positioning block are connected with the connecting block respectively, the chair leg beam positioning surface is arranged on the first positioning block, and the bolt positioning surface is arranged on the second positioning block.
3. An anchor bolt verification tool according to claim 2, wherein: The second positioning block is connected to one side of the connecting block away from the first positioning block in the second direction, the second positioning block protrudes from the connecting block in the second direction to form a check cavity, and the adjusting groove communicates with the check cavity.
4. The anchor-verification tool of claim 2, wherein: The first positioning block is provided with a first limiting surface and a second limiting surface, the first limiting surface and the second limiting surface are arranged at intervals along the third direction, the first limiting surface is connected to one end of the chair leg beam positioning surface in the third direction, the second limiting surface is connected to the other end of the chair leg beam positioning surface in the third direction, and the first limiting surface, the second limiting surface and the chair leg beam positioning surface define a chair leg beam limiting groove.
5. The anchor-verification tool of claim 2, wherein: The first positioning block, the second positioning block and the connecting block are integrally formed.
6. The anchor verification tool of claim 1, wherein: The preset measurement distance is 12.7 mm.
7. The anchor-verification tool of claim 2, wherein: The adjusting groove is provided with an insertion opening, and the opening direction of the insertion opening in the second direction is away from the first positioning block.