Static rigidity experimental device for aeronautical parts
By designing a static stiffness testing device for aerospace parts, an electric actuator and linkage components are used to raise the enclosure to shield debris, and an air pump is used to blow away the debris, thus solving the problem of metal debris splashing and achieving a safe and efficient testing process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- AVIC POWER ZHUZHOU AVIATION PARTS MFG
- Filing Date
- 2025-06-11
- Publication Date
- 2026-04-21
AI Technical Summary
During the static stiffness testing of aerospace parts, flying metal shavings can easily injure nearby workers and are difficult to clean up.
An experimental device for static stiffness of aerospace parts was designed. During the process of the pressure plate being lowered by an electric push rod, the enclosure was raised by a linkage component to block the flow, and the debris was blown away by an air cylinder and collected in the space between the blocks.
It effectively prevents debris from flying and causing injury to workers, reduces the labor intensity of cleaning up debris, and improves the safety and efficiency of testing.
Smart Images
Figure CN224152012U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of static stiffness testing technology, specifically to a static stiffness testing device for aerospace parts. Background Technology
[0002] Static stiffness testing is an important experimental method for evaluating the ability of materials, components, or structures to resist deformation under static loads. It is a key link in mechanical design, structural engineering, and quality control. Through static stiffness testing, it can be ensured that parts or structures meet stiffness requirements in actual use and avoid functional failure or safety hazards caused by excessive deformation.
[0003] In the current testing of aerospace components, static stiffness testing is often required, necessitating the use of appropriate static stiffness testing equipment. Currently, this testing typically involves placing the component on a platform, then using a hydraulic cylinder or electric actuator to lower a pressure block and apply pressure. Pressure sensors monitor the pressure, while distance sensors detect the deformation distance under pressure. However, during testing, continuous pressure is applied to test the component's maximum stiffness (maximum compressive strength). When deformation occurs, metal fragments often fly out, making it difficult to protect against with barriers and posing a risk of injury to nearby personnel. Therefore, a new technical solution is needed to address this issue. Utility Model Content
[0004] The purpose of this invention is to provide a static stiffness testing device for aerospace parts, which solves the problem mentioned in the background art that when parts deform, metal fragments often fly out, which is not easy to protect with barriers, and thus the flying fragments can easily cause injury to surrounding workers.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a static stiffness testing device for aerospace parts, comprising a base, a carrier plate fixedly connected to the top of the base via a support column, a first carrier block fixedly installed on the top of the carrier plate, a through hole extending to the lower side of the carrier plate at the center of the top of the first carrier block, a second carrier block disposed within the through hole, a gantry frame fixedly installed on the top of the carrier plate, an electric push rod fixedly installed at the center of the top of the gantry frame, the push rod of the electric push rod movably passing through the gantry frame and fixedly connected to a pressure sensor, a pressure plate fixedly connected to the bottom of the pressure sensor, high-precision distance sensors fixedly connected to both sides of the pressure plate, a suitable enclosure fitted to the outer wall of the first carrier block, and the outer wall of the push rod of the electric push rod connected to the enclosure via a linkage component.
[0006] By adopting the above technical solution, in actual use, the product to be tested is first placed on top of the second carrier block. Then, the electric push rod is activated to drive the pressure plate to descend. During the process of the pressure plate applying pressure to the product, the pressure sensor can provide feedback on the pressure value. At the same time, the high-precision distance sensor can provide feedback on the distance moved after pressure is generated, which is the distance of product deformation. During the descent of the pressure plate, the linkage component can drive the enclosure to rise, thereby using the enclosure to shield the parts. In the event of flying debris, the enclosure can be used for protection, which helps to prevent debris from causing injury to surrounding personnel and also helps to prevent debris from being difficult to clean up. When the electric push rod retracts, it can drive the linkage component to lower the enclosure, which helps to avoid affecting the personnel in removing the workpiece.
[0007] In a preferred embodiment of this utility model, the linkage component includes four connecting plates, which are respectively fixed to the four sides of the outer wall of the electric push rod. A first rack is fixedly connected to the outer end of the connecting plate, and a gear is provided on the lower side of the first rack. Both ends of the gear are movably connected to a retainer, and the tail end of the retainer is fixed to the top of the carrier plate. A second rack is engaged with one side wall of the gear, and the second rack is fixedly installed on the side wall of the enclosure.
[0008] By adopting the above technical solution, in actual use, when the push rod of the electric actuator extends, it drives the connecting plate to descend, which in turn drives the first rack to descend. After descending a certain distance, it engages the gear, causing the gear to rotate. The gear then drives the second rack to move upward, thereby raising the enclosure to block debris. At the same time, when the electric actuator retracts, it drives the first rack to rise, causing the gear to reverse, which in turn causes the raised second rack to descend, thus driving the enclosure to descend. This helps to avoid affecting the workers' ability to retrieve workpieces.
[0009] In a preferred embodiment of this utility model, an air cylinder is installed on one side of the top of the gantry frame. The inner cavity of the air cylinder is provided with a matching piston. A movable rod is fixedly connected to the bottom of the piston. The tail end of the movable rod movably passes through the gantry frame and is fixedly connected to the outer wall of the push rod of the electric push rod through a fixed plate. A conduit is fixedly connected to the top of the air cylinder. The conduit passes through the first carrier block and is connected to an annular tube. The annular tube is fixed to the top of the first carrier block. Multiple evenly distributed air outlet holes are opened on the inner wall of the annular tube.
[0010] By adopting the above technical solution, the electric actuator can lift the movable rod when it lifts the pressure block, thereby lifting the piston and pushing the gas in the air cylinder into the inner cavity of the annular tube. The gas is then blown along the air outlet on the inner wall of the annular tube onto the surface of the first carrier block, thus blowing the debris blocked by the enclosure towards the center. This allows the debris to enter the space between the first and second carrier blocks, enabling it to be collected without the need for subsequent manual cleaning, which helps reduce the labor intensity of the workers.
[0011] In a preferred embodiment of this utility model, the four side walls of the second carrier block are all fixedly connected to the inner wall of the first carrier block through connecting blocks.
[0012] By adopting the above technical solution, when in use, a collection box is placed on top of the base, so that debris entering the space between the first and second carrier blocks can fall into the collection box and be collected.
[0013] In a preferred embodiment of this utility model, a one-way air inlet valve is fixedly connected to the upper side of the outer wall of the air cylinder, so that the air pressure can be balanced through the one-way air inlet valve during the piston's descent.
[0014] In a preferred embodiment of this utility model, a limiting rod is fixedly connected to the top of the connecting plate, and the limiting rod movably passes through the gantry frame.
[0015] In a preferred embodiment of this utility model, the back of the first rack is attached to the inner wall of the gantry frame.
[0016] In a preferred embodiment of this utility model, rubber blocks are embedded at the four corners of the bottom of the base.
[0017] In a preferred embodiment of this utility model, both the pressure sensor and the high-precision distance sensor are electrically connected to an industrial control computer.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] This utility model uses an electric push rod to drive the pressure plate to descend, which simultaneously drives the first rack to descend, thereby acting on the gear and causing the gear to rotate. The gear then drives the second rack to rise, thereby causing the barrier to rise during the pressure on the parts. This creates a shield for the parts on the second carrier block, and when debris flies, the barrier can be used for protection, which helps to prevent debris from injuring nearby workers and also helps to prevent debris from flying and being difficult to clean up.
[0020] When the electric actuator lifts the pressure block, it also lifts the movable rod, which in turn lifts the piston. This pushes the gas from the air cylinder into the inner cavity of the annular tube, and then blows it along the air outlet on the inner wall of the annular tube onto the surface of the first carrier block. This blows the debris blocked by the enclosure toward the center, allowing the debris to enter the space between the first and second carrier blocks. The debris can then pass through the carrier plate, making it easy to collect without the need for subsequent manual cleaning, thus reducing the labor intensity of the workers. Attached Figure Description
[0021] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0022] Figure 1 This is a schematic diagram of the overall structure of a static stiffness testing device for aerospace parts according to the present invention.
[0023] Figure 2 This is a front view schematic diagram of the static stiffness testing device for aerospace parts according to the present invention;
[0024] Figure 3 This is a schematic diagram of the linkage component structure of a static stiffness testing device for aerospace parts according to the present invention.
[0025] Figure 4 This is a schematic diagram of the connection structure between the air cylinder and the electric actuator of the static stiffness testing device for aerospace parts according to this utility model;
[0026] Figure 5 This is an enlarged structural schematic diagram of A, a static stiffness testing device for aerospace parts according to this utility model.
[0027] Figure 6 This is a cross-sectional view of the air cylinder structure of the static stiffness testing device for aerospace parts according to this utility model.
[0028] Figure 7 This is a top view of the first carrier block, the second carrier block, and the carrier plate of the static stiffness test device for aerospace parts according to this utility model.
[0029] In the picture:
[0030] 1. Base; 11. Carrier plate; 12. First carrier block; 13. Second carrier block; 14. Enclosure; 15. Electric actuator; 16. Pressure sensor; 17. Pressure plate; 18. High-precision distance sensor;
[0031] 2. Connecting plate; 21. First rack; 22. Gear; 23. Second rack; 24. Limiting rod;
[0032] 3. Air cylinder; 31. Guide tube; 32. One-way air inlet valve; 33. Movable rod; 34. Ring tube; 35. Air outlet; 36. Piston. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship 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.
[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The model numbers of the electrical appliances provided in this utility model are for reference only, and different models of electrical appliances with the same function can be replaced according to actual usage.
[0036] Please see Figure 1-7 This utility model provides a technical solution: a static stiffness test device for aerospace parts, including a base 1, a carrier plate 11 fixedly connected to the top of the base 1 by a support column, a first carrier block 12 fixedly installed on the top of the carrier plate 11, a through hole is opened in the middle of the top of the first carrier block 12 and the through hole extends to the lower side of the carrier plate 11, and a second carrier block 13 is arranged in the through hole.
[0037] A gantry frame is fixed to the top of the carrier plate 11. An electric push rod 15 is fixedly installed at the middle of the top of the gantry frame. The push rod of the electric push rod 15 moves through the gantry frame and is fixedly connected to a pressure sensor 16. A pressure plate 17 is fixedly connected to the bottom of the pressure sensor 16. High-precision distance sensors 18 are fixedly connected to both sides of the pressure plate 17. A matching enclosure 14 is fitted on the outer wall of the first carrier block 12. The outer wall of the push rod of the electric push rod 15 is connected to the enclosure 14 through a linkage component.
[0038] It should be understood that in actual use, the product to be tested is first placed on top of the second carrier block 13, and then the electric push rod 15 is activated to drive the pressure plate 17 to descend. During the process of the pressure plate 17 applying pressure to the product, the pressure sensor 16 can be used to provide feedback on the pressure value. At the same time, the high-precision distance sensor 18 can provide feedback on the distance moved after pressure is generated, which is the distance of product deformation. During the process of the pressure plate 17 descending, the linkage component can drive the enclosure 14 to rise, thereby using the enclosure 14 to shield the parts. In the event of flying debris, the enclosure 14 can be used for protection, which helps to prevent debris from causing injury to surrounding personnel and also helps to prevent debris from being difficult to clean. When the electric push rod 15 retracts, it can drive the linkage component to drive the enclosure 14 to descend, which helps to avoid affecting the personnel in removing the workpiece.
[0039] Furthermore, rubber blocks are embedded at the four corners of the bottom of the base 1. The rubber blocks increase friction during use, which helps to prevent the device from sliding.
[0040] Furthermore, both the pressure sensor 16 and the high-precision distance sensor 18 are electrically connected to the industrial control computer, enabling data to be fed back to the industrial control computer and further analyzed with the help of software.
[0041] like Figure 1-2 As shown; the linkage component includes four connecting plates 2, which are fixed to the four sides of the outer wall of the electric push rod 15. A first rack 21 is fixedly connected to the outer end of the connecting plate 2. A gear 22 is provided on the lower side of the first rack 21. A retainer is movably connected to both ends of the gear 22. The tail end of the retainer is fixed to the top of the carrier plate 11. A second rack 23 is meshed on one side wall of the gear 22. The second rack 23 is fixedly installed on the side wall of the enclosure 14.
[0042] It should be understood that in actual use, when the push rod of the electric push rod 15 extends, it drives the connecting plate 2 to descend, which in turn drives the first rack 21 to descend. After descending a certain distance, it will act on the gear 22, causing the gear 22 to rotate. The gear 22 then drives the second rack 23 to move upward, thereby raising the enclosure 14 to block debris. At the same time, when the electric push rod 15 retracts, it drives the first rack 21 to rise, causing the gear 22 to reverse, which causes the raised second rack 23 to descend, thereby driving the enclosure 14 to descend. This helps to avoid affecting the workers' ability to pick up and retrieve workpieces.
[0043] Furthermore, the back of the first rack 21 is attached to the inner wall of the gantry, which helps to improve the stability of the first rack 21 during the lifting process.
[0044] Furthermore, a limiting rod 24 is fixedly connected to the top of the connecting plate 2. The limiting rod 24 moves through the gantry frame. The setting of the limiting rod 24 can further limit the lifting trajectory of the connecting plate 2, thereby helping to improve the lifting stability of the connecting plate 2.
[0045] like Figure 1-7 As shown; an air cylinder 3 is installed on one side of the top of the gantry frame. The inner cavity of the air cylinder 3 is provided with a matching piston 36. The bottom of the piston 36 is fixedly connected to a movable rod 33. The tail end of the movable rod 33 moves through the gantry frame and is fixedly connected to the outer wall of the push rod of the electric push rod 15 through a fixed plate. The top of the air cylinder 3 is fixedly connected to a conduit 31. The conduit 31 passes through the first carrier block 12 and is connected to an annular pipe 34. The annular pipe 34 is fixed to the top of the first carrier block 12. The inner wall of the annular pipe 34 is provided with multiple evenly distributed air outlets 35. The air outlets 35 are inclined downwards.
[0046] It should be understood that when the electric actuator 15 lifts the pressure plate 17, it can lift the movable rod 33, which in turn lifts the piston 36. This pushes the gas in the air cylinder 3 into the inner cavity of the annular tube 34, and blows it along the air outlet 35 on the inner wall of the annular tube 34 onto the surface of the first carrier block 12. This blows the debris blocked by the enclosure 14 toward the center, allowing the debris to enter the space between the first carrier block 12 and the second carrier block 13, thus enabling the debris to be collected without the need for subsequent manual cleaning by the staff, which helps to reduce the labor intensity of the staff.
[0047] Furthermore, the four side walls of the second carrier block 13 are fixedly connected to the inner wall of the first carrier block 12 via connecting blocks, so that when in use, a collection box is placed on top of the base 1, and the debris that enters the space between the first carrier block 12 and the second carrier block 13 can fall into the collection box and be collected.
[0048] Furthermore, a one-way air inlet valve 32 is fixedly connected to the upper side of the outer wall of the air cylinder 3. The one-way air inlet valve 32 ensures air pressure balance during the descent of the piston 36.
[0049] In summary, this invention, through the electric actuator driving the pressure plate downwards, simultaneously drives the first rack downwards, which in turn acts on the gear, causing the gear to rotate. This gear then drives the second rack to rise, thereby raising the barrier during the pressure application on the parts. This barrier shields the parts on the second carrier block, protecting them from flying debris and preventing injury to nearby workers. It also helps prevent debris from being difficult to clean up. Furthermore, the electric actuator, while raising the pressure block, also raises the movable rod, which in turn raises the piston. This pushes gas from the air cylinder into the inner cavity of the annular tube, blowing it through the air outlet on the inner wall of the annular tube onto the surface of the first carrier block. This blows the debris shielded by the barrier towards the center, allowing it to enter the space between the first and second carrier blocks and pass through the carrier plate for easy collection. This eliminates the need for subsequent manual cleaning, reducing the workload for workers.
[0050] Furthermore, the components included in this utility model's static stiffness testing device for aerospace parts are all general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the matching monitoring computer and power supply, are connected by wires. The electrical connections between the various electrical components are completed in the order of their operation. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process, and will not describe the electrical control.
[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A static stiffness testing device for aerospace components, comprising a base (1), wherein a carrier plate (11) is fixedly connected to the top of the base (1) via a support column, a first carrier block (12) is fixedly mounted on the top of the carrier plate (11), a through hole is provided at the middle of the top of the first carrier block (12) and the through hole extends to the lower side of the carrier plate (11), and a second carrier block (13) is disposed in the through hole, characterized in that: A gantry frame is fixed to the top of the carrier plate (11). An electric push rod (15) is fixedly installed at the middle of the top of the gantry frame. The push rod of the electric push rod (15) moves through the gantry frame and is fixedly connected to a pressure sensor (16). A pressure plate (17) is fixedly connected to the bottom of the pressure sensor (16). High-precision distance sensors (18) are fixedly connected to both sides of the pressure plate (17). A suitable enclosure (14) is fitted on the outer wall of the first carrier block (12). The outer wall of the push rod of the electric push rod (15) is connected to the enclosure (14) through a linkage component.
2. The experimental device for static stiffness of an aeronautical part according to claim 1, characterized in that: The linkage assembly includes four connecting plates (2). The four connecting plates (2) are fixed to the four sides of the outer wall of the electric push rod (15). The outer end of the connecting plate (2) is fixedly connected to a first rack (21). A gear (22) is provided on the lower side of the first rack (21). Both ends of the gear (22) are movably connected to a retainer. The tail end of the retainer is fixed to the top of the carrier plate (11). A second rack (23) is meshed on one side wall of the gear (22). The second rack (23) is fixedly installed on the side wall of the enclosure (14).
3. The experimental device for static stiffness of an aeronautical part according to claim 1, characterized in that: An air cylinder (3) is installed on one side of the top of the gantry frame. The inner cavity of the air cylinder (3) is provided with a matching piston (36). The bottom of the piston (36) is fixedly connected to a movable rod (33). The tail end of the movable rod (33) moves through the gantry frame and is fixedly connected to the outer wall of the push rod of the electric push rod (15) through a fixed plate. The top of the air cylinder (3) is fixedly connected to a conduit (31). The conduit (31) passes through the first carrier block (12) and is connected to an annular pipe (34). The annular pipe (34) is fixed to the top of the first carrier block (12). The inner wall of the annular pipe (34) is provided with multiple evenly distributed air outlets (35).
4. The experimental device for static stiffness of an aeronautical part according to claim 1, characterized in that: The four side walls of the second carrier block (13) are fixedly connected to the inner wall of the first carrier block (12) through connecting blocks.
5. The experimental device for static stiffness of an aeronautical part according to claim 3, characterized in that: A one-way air inlet valve (32) is fixedly connected to the upper side of the outer wall of the air cylinder (3).
6. The experimental device for static stiffness of an aeronautical part according to claim 2, characterized in that: The top of the connecting plate (2) is fixedly connected to a limiting rod (24), which moves through the gantry frame.
7. The experimental device for static stiffness of an aeronautical part according to claim 2, characterized in that: The back of the first rack (21) is attached to the inner wall of the gantry.
8. The experimental device for static stiffness of an aeronautical part according to claim 1, characterized in that: Rubber blocks are embedded at the four corners of the bottom of the base (1).
9. The static stiffness testing device for aerospace parts according to claim 1, characterized in that: Both the pressure sensor (16) and the high-precision distance sensor (18) are electrically connected to the industrial control computer.
10. The experimental device for measuring the static stiffness of an aeronautical part according to claim 3, characterized in that: The air outlet (35) is set at an angle downward.