A dynamic impact test equipment for hurricane-resistant doors and windows

Abstract

The present application relates to the technical field of building door and window performance detection, and particularly relates to a hurricane-proof door and window dynamic impact test equipment, which comprises a space moving platform, an impact air pressure pump, an impact assembly, an outer end centering assembly and an inner end centering assembly, the outer end centering assembly is installed at the outlet end of the impact assembly, the outer end centering assembly is coaxial with the impact rod and the impact assembly, the inner end centering assembly is coaxially installed at the outer end surface of the impact disc, and the inner end centering assembly is coaxial with the impact rod at the inner end of the impact assembly. The present application can simultaneously clamp and coaxially position the inner and outer ends of the impact rod through the cooperation of the outer end centering assembly and the inner end centering assembly when the impact rod is installed, so that the impact rod and the impact head axis strictly coincide, effectively solve the problem that the inner and outer ends of the impact rod cannot be concentric with the barrel in the prior art, and the problem that the flying direction is inclined, and the impact point precision and the accuracy and repeatability of test data are significantly improved.

Description

Technical Field

[0001] This invention relates to the technical field of performance testing of building doors and windows, and in particular to a dynamic impact testing device for hurricane-resistant doors and windows. Background Technology

[0002] In hurricane-prone areas, building doors, windows, curtain walls, and impact protection systems must undergo rigorous impact resistance testing before they can be put into use. The core of the testing is to simulate the dynamic impact of projectiles on doors and windows under hurricane conditions and assess key indicators such as whether the test specimen is penetrated and whether the interlayer glass film separates from the glass.

[0003] Existing hurricane-resistant door and window impact testing equipment mainly adopts a pneumatic cannon firing method, using compressed air as power to accelerate a wooden flying rod to a specified speed through a launch tube before launching it at the test specimen. Typical equipment mainly consists of the following parts:

[0004] Launching system: includes air compressor, air tank, launch valve, gun barrel, etc., used to generate and release compressed air to push the impact rod;

[0005] Speed ​​measurement system: Photoelectric speed measuring devices (such as through-beam infrared light curtains) are typically used to record the muzzle velocity of projectiles;

[0006] Specimen mounting system: used to fix the door and window specimens under test and ensure the stability of the specimen position during impact;

[0007] Control system: Used to control firing timing, air pressure regulation, etc.

[0008] Although existing impact testing equipment can basically meet the standard requirements, the following defects and shortcomings still exist in actual use:

[0009] 1. Inconvenient muzzle position adjustment and low positioning accuracy. Existing fixed or simple sliding rail equipment relies heavily on manual operation or coarse adjustment mechanisms when adjusting the horizontal and vertical positions of the muzzle. This makes it difficult to accurately position any impact point within the range of large-sized specimens, and the adjustment process is time-consuming, affecting test efficiency.

[0010] 2. During the installation of the impact rod, it is not possible to ensure that the inside and outside of the impact rod are concentric with the barrel. This will cause the impact rod to tilt when it flies out, and it will not be able to produce a precise impact on the door and window, resulting in errors in the test data.

[0011] Therefore, there is an urgent need to develop a dynamic impact testing device for hurricane-resistant doors and windows with precise muzzle positioning and accurate coaxial positioning of the impact rod before it flies out, in order to overcome the above-mentioned defects of the existing technology. Summary of the Invention

[0012] To address the problems mentioned in the background art, the present invention provides a dynamic impact testing device for hurricane-resistant doors and windows.

[0013] This invention provides a dynamic impact testing device for hurricane-resistant doors and windows, employing the following technical solution: It includes a spatial movement platform and an impact air pump, wherein the spatial movement platform controls the spatial movement of the impact air pump, and further includes:

[0014] An impact assembly is connected to a space moving platform and an impact air pump. The space moving platform controls the spatial movement of the impact assembly, and the impact air pump provides air pressure power to the impact assembly. The impact assembly includes an impact head and an impact disc. The impact disc is slidably inserted into the impact head. The impact air pump provides impact power for the movement of the impact disc within the impact head.

[0015] An outer end centering assembly is installed at the outlet end of the impact assembly, and the outer end centering assembly makes the impact rod coaxial with the impact assembly;

[0016] An inner end centering assembly is coaxially mounted on the outer end face of the impact disc, and the inner end centering assembly is coaxial with the end of the impact rod located inside the impact assembly.

[0017] Optionally, the outer end centering assembly includes multiple external telescopic rods and a mounting cylinder. The mounting cylinder is coaxially mounted on the outer end face of the impact gun head. The external telescopic rods intersect perpendicularly with the axis of the mounting cylinder, and the external telescopic ends of the external telescopic rods are fixed to the mounting cylinder.

[0018] The outer end centering component also includes an overall transmission component, which simultaneously controls the extension and retraction of multiple external telescopic rods. An external limit wheel is installed at the end of the external telescopic rod near the axis of the impact gun head.

[0019] Optionally, the external telescopic rod includes an external square telescopic rod and a threaded shaft. The outer end of the external square telescopic rod is connected to the mounting shaft cylinder. The inner telescopic end of the external square telescopic rod is threaded onto the outside of the threaded shaft. The outer telescopic end of the external square telescopic rod is rotatably sleeved onto the outside of the threaded shaft. An external limit wheel is installed on one end of the external square telescopic rod near the axis of the impact gun head.

[0020] Optionally, the overall transmission assembly includes a rotating cylinder and a bevel gear ring. The rotating cylinder and the bevel gear ring are coaxially mounted. The rotating cylinder is rotatably sleeved on the outside of the impact gun head, and the rotating cylinder rotates elastically relative to the impact gun head.

[0021] The threaded shaft is coaxially mounted with a bevel gear at one end outside the outer square telescopic rod, and the bevel gear meshes with the bevel gear ring.

[0022] Optionally, the inner end centering assembly includes multiple inner telescopic rods, which are evenly distributed in a circumferential array around the axis of the impact disk. The axes of the inner telescopic rods intersect perpendicularly with the axis of the impact disk. The outer telescopic ends of the inner telescopic rods move horizontally and elastically relative to the impact disk. Limiting rods are sleeved and installed at the four corners of the outer telescopic ends of the inner telescopic rods, and the limiting rods are installed on the end face of the impact disk.

[0023] Optionally, the inner telescopic rod includes a sleeve and a movable rod. The sleeve is located inside the corresponding limiting rod, and the movable rod is slidably inserted into one end of the sleeve near the axis of the impact disc. An inner limiting wheel is rotatably installed on one end of the movable rod on the outside of the sleeve, and the movable rod is elastically connected to the sleeve.

[0024] The sleeve has a horizontal groove at the end away from the movable rod. A pull bar is slidably inserted into the groove of the sleeve. A pull rope is fixed at one end of the movable rod inside the sleeve. The other end of the pull rope slides through the inner wall of the sleeve. The pull rope is connected to the pull bar at the outer end of the sleeve.

[0025] Optionally, the pull rope is installed in the middle of the pull bar, and a top rod is provided on the side of the pull bar near the impact plate, with the top rod installed on the end face of the impact plate.

[0026] Optionally, the inner wall of the impact gun head on the side away from its air inlet end is provided with a groove corresponding to each pull bar and each limiting rod, the impact plate is located at the outermost position inside the impact gun head, and the pull bars and limiting rods are respectively located inside the corresponding grooves of the impact gun head.

[0027] Optionally, a storage groove is provided at one end of the pull bar and the pull rope. The pull bar moves relative to the sleeve box, and the pull rope moves into the storage groove. The cross-sectional area of ​​the top rod is smaller than that of the pull bar. Each pair of adjacent sleeve boxes is connected by a linkage plate.

[0028] In summary, the present invention has the following beneficial technical effects:

[0029] 1. This invention, through the coordinated operation of the outer and inner centering components, simultaneously performs radial clamping and coaxial positioning of both the inner and outer ends of the impact rod during installation, ensuring that the impact rod is strictly aligned with the axis of the impact gun head. This effectively solves the problem in the prior art that the inner and outer ends of the impact rod cannot be concentric with the gun barrel and that the flight direction is tilted, significantly improving the accuracy of the impact point and the accuracy and repeatability of the test data.

[0030] 2. This invention uses a trolley-type spatial moving platform controlled by a motor to achieve horizontal and vertical movement. Combined with the infrared crosshair aiming function of the impact cannon head, it can achieve precise positioning of any impact point within the range of large-sized door and window specimens. This solves the problems of inconvenient muzzle position adjustment, low positioning accuracy, and long adjustment time of existing fixed or simple sliding rail equipment, thus improving the efficiency of the test.

[0031] 3. The present invention utilizes the linkage structure of the top rod, pull bar, and pull rope in the inner centering assembly to automatically release the inner end of the impact rod at the moment of firing when the impact disc is pushed to the muzzle position by air pressure. This ensures the coaxial clamping of the inner end during the loading stage and avoids interference of the clamping mechanism with the normal flight of the impact rod, thus realizing the connection between coaxial positioning and impact firing.

[0032] 4. This invention uses the rotating cylinder, bevel gear ring and bevel gear of the overall transmission assembly to drive multiple external telescopic rods to extend and retract synchronously, realizing the synchronous opening and closing of the four-claw external limit wheel. It can adapt to impact rods with different cross-sectional sizes and ensure that the clamping center always coincides with the axis of the impact gun head, thereby improving the applicability of the equipment, operational safety and the traceability of test data. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention;

[0034] Figure 2 This is a top view of the structure in an embodiment of the present invention;

[0035] Figure 3 This is a front view structural diagram in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the impact component in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure inside the impact cannon head in an embodiment of the present invention;

[0038] Figure 6 This is a side view of the outer centering component in an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the structure of the outer end centering component in an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of the inner end centering component in an embodiment of the present invention;

[0041] Figure 9 This is a structural schematic diagram of the internal telescopic rod in an embodiment of the present invention.

[0042] Reference numerals: 1. Space moving platform; 2. Impact air pump; 3. Impact assembly; 31. Impact cannon head; 32. Impact disc; 4. Outer end centering assembly; 41. Outer telescopic rod; 411. Outer square telescopic rod; 412. Threaded shaft; 42. Mounting shaft cylinder; 43. Integral transmission assembly; 431. Rotating cylinder; 432. Bevel gear ring; 433. Bevel gear; 44. Outer limit wheel; 5. Inner end centering assembly; 51. Inner telescopic rod; 511. Sleeve box; 512. Movable rod; 513. Inner limit wheel; 514. Tie bar; 515. Tie rope; 516. Top rod; 517. Storage tank; 518. Linkage plate; 52. Limiting rod. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0044] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0045] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] Furthermore, the use of terms such as "first" and "second" in this application is 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 "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0047] Existing hurricane-resistant door and window impact testing equipment mainly adopts a pneumatic cannon firing method, using compressed air as power to accelerate a wooden impact rod to a specified speed through a launch tube before shooting it at the specimen. However, when installing the impact rod, the existing equipment cannot ensure that both the inner and outer ends of the impact rod are concentric with the cannon barrel. This causes the impact rod to tilt when it flies out, which cannot produce a precise impact on the door and window, resulting in errors in the test data. At the same time, the muzzle position is inconvenient to adjust and the positioning accuracy is low, making it difficult to accurately locate any impact point within the range of large-sized specimens.

[0048] The following is in conjunction with the appendix Figures 1-9 The present invention will be described in further detail below.

[0049] This invention discloses a dynamic impact testing device for hurricane-resistant doors and windows. For example... Figures 1-9As shown, it includes a space moving platform 1 and an impact air pump 2. The space moving platform 1 controls the space movement of the impact air pump 2. It also includes an impact component 3, an outer end centering component 4 and an inner end centering component 5.

[0050] The space mobile platform 1 is a trolley-type structure. The main body is controlled by a motor to realize the horizontal and vertical movement of the main body of the test equipment. It is equipped with an electrical control cabinet. The circuits and pneumatic circuits of all moving parts of the equipment are connected in the form of a tank chain to prevent the movement of the moving circuits from affecting the safety of the experiment. All the movements of the test body can be operated independently away from the operator, improving the safety of the equipment operation and adapting to the testing needs of large-sized door and window specimens with different impact points. The impact air pump 2 is connected to the space mobile platform 1 and moves synchronously with the space mobile platform 1 to provide compressed air power. The equipment operating area is equipped with a safety light grid with a total of 7 beams working simultaneously. Each beam can be individually adjusted to measure the distance. When there is an obstacle in the area during the experiment, the test equipment cannot be fired and will alarm, comprehensively improving the safety performance of the equipment.

[0051] The impact assembly 3 is connected to the space moving platform 1 and the impact air pump 2. The space moving platform 1 controls the spatial movement of the impact assembly 3, and the impact air pump 2 provides air pressure power to the impact assembly 3. The impact assembly 3 includes an impact head 31 and an impact disc 32. The impact head 31 has a cylindrical structure, and its air inlet end is connected to the air outlet end of the impact air pump 2 through an air pipe. The impact disc 32 is slidably inserted into the impact head 31. The compressed air released by the impact air pump 2 acts on the air inlet end face of the impact disc 32, providing impact power for the movement of the impact disc 32 in the impact head 31, so that the impact disc 32 slides at high speed along the axis of the impact head 31 towards the muzzle. The impact head 31 has infrared cross aiming function, muzzle velocity recording and other functions, which facilitates the recording and archiving of test data and results.

[0052] The outer end centering component 4 is installed at the outlet end of the impact component 3, that is, the muzzle end of the impact head 31. The outer end centering component 4 makes the impact rod coaxial with the impact component 3 and radially limits the end of the impact rod located outside the muzzle to ensure that the outer end of the impact rod coincides with the axis of the impact head 31.

[0053] Furthermore, combined Figures 4 to 7The specific structure of the outer end centering component 4 is described below. The outer end centering component 4 includes multiple external telescopic rods 41 and a mounting cylinder 42. The mounting cylinder 42 is coaxially mounted on the outer end face of the impact head 31. The inner diameter of the mounting cylinder 42 is adapted to the inner diameter of the impact head 31, forming a channel for the impact rod to fly out. The external telescopic rods 41 intersect the axis of the mounting cylinder 42 perpendicularly, that is, the external telescopic rods 41 are arranged radially along the mounting cylinder 42. The outer telescopic ends of the external telescopic rods 41 are fixed to the mounting cylinder 42, and the inner telescopic ends of the external telescopic rods 41 can extend and retract radially. In this embodiment, the number of external telescopic rods 41 is preferably four. The shape of the impact rod is generally a square rod. The four external telescopic rods 41 can respectively contact and limit the four sides of the impact rod. They are evenly distributed in a circumferential array with the axis of the mounting cylinder 42 as the center, forming a four-claw centering clamping structure.

[0054] The outer end centering assembly 4 also includes an integral transmission assembly 43, which simultaneously controls the synchronous extension and retraction of multiple outer telescopic rods 41 to achieve adaptive clamping of impact rods of different diameters. An outer limit wheel 44 is installed at the end of the outer telescopic rod 41 near the axis of the impact head 31. The axis of the outer limit wheel 44 is perpendicular to the axis of the impact head 31. The outer ring surface of the outer limit wheel 44 rolls in contact with the outer surface of the impact rod. When the impact rod moves axially, the outer limit wheel 44 can rotate with the movement of the impact rod to reduce frictional resistance and at the same time play a radial guiding role for the impact rod.

[0055] Furthermore, the outer telescopic rod 41 includes an outer square telescopic rod 411 and a threaded shaft 412. The outer end of the outer square telescopic rod 411 is connected to the mounting shaft 42. The inner telescopic end of the outer square telescopic rod 411 is threaded onto the outside of the threaded shaft 412. The outer telescopic end of the outer square telescopic rod 411 is rotatably sleeved onto the outside of the threaded shaft 412. That is, the two ends of the threaded shaft 412 are respectively engaged with the two ends of the outer square telescopic rod 411, one end being threaded and the other end being rotatable. The cross-section of the outer square telescopic rod 411 is square and is connected to the mounting shaft 42. When the threaded shaft 412 rotates, the outer square telescopic rod 411 is driven to extend and retract radially through threaded transmission. The outer limit wheel 44 is installed on the end of the outer square telescopic rod 411 near the axis of the impact gun head 31 and moves synchronously with the outer square telescopic rod 411.

[0056] Furthermore, the overall transmission assembly 43 includes a rotating cylinder 431 and a bevel gear ring 432. The rotating cylinder 431 and the bevel gear ring 432 are coaxially mounted. The rotating cylinder 431 is rotatably sleeved on the outside of the impact head 31. The rotating cylinder 431 can rotate around the axis of the impact head 31. The rotating cylinder 431 rotates elastically relative to the impact head 31. That is, an elastic element, such as a torsion spring, is provided between the rotating cylinder 431 and the impact head 31 to provide a torsional force to the rotating cylinder 431. The bevel gear ring 432 is fixedly mounted on the end face of the rotating cylinder 431 and rotates synchronously with the rotating cylinder 431.

[0057] A bevel gear 433 is coaxially mounted on one end of the threaded shaft 412 on the outer side of the outer square telescopic rod 411. The bevel gear 433 meshes with the bevel ring 432. When the rotating cylinder 431 is rotated, the bevel ring 432 rotates synchronously with the rotating cylinder 431. Through the meshing transmission between the bevel ring 432 and the bevel gear 433, all the threaded shafts 412 are driven to rotate synchronously, thereby driving all the outer square telescopic rods 411 to extend and retract synchronously. This achieves the synchronous opening and closing of multiple outer limit wheels 44, ensuring that the clamping center always coincides with the axis of the impact head 31. When the rotating cylinder 431 is released, the rotating cylinder 431 rotates under the action of the elastic element, causing the outer square telescopic rod 411 to extend inward. The outer limit wheel 44 contacts the outer side of the impact rod, thus coaxially limiting the impact rod and the impact head 31.

[0058] The inner end centering component 5 is coaxially mounted on the outer end face of the impact plate 32, that is, the end face of the impact plate 32 facing the muzzle. The inner end centering component 5 coaxially positions the end of the impact rod located inside the impact component 3, ensuring that the inner end of the impact rod coincides with the axis of the impact head 31. When the end of the impact rod inserted into the impact head 31 contacts the impact plate 32, the inner end centering component 5 coaxially positions the inner end of the impact rod. Through the synergistic action of the outer end centering component 4 and the inner end centering component 5, both the inner and outer ends of the impact rod are coaxially clamped, thereby ensuring that the impact rod remains strictly coaxial with the impact head 31 before firing, and avoiding tilting when it flies out.

[0059] Furthermore, combined Figure 8 and Figure 9 The specific structure of the inner end centering component 5 is described below. The inner end centering component 5 includes multiple inner telescopic rods 51, which are evenly distributed in a circumferential array around the axis of the impact disk 32. The axes of the inner telescopic rods 51 intersect the axis of the impact disk 32 perpendicularly, that is, the inner telescopic rods 51 are arranged radially along the impact disk 32. The outer telescopic ends of the inner telescopic rods 51 move horizontally and elastically relative to the impact disk 32. That is, under the action of elastic force, the telescopic ends of the inner telescopic rods 51 tend to extend towards the axis of the impact disk 32. Limiting rods 52 are sleeved and installed at the four corners of the outer telescopic ends of the inner telescopic rods 51. The limiting rods 52 are installed on the end face of the impact disk 32 and play a guiding and limiting role for the outer telescopic ends of the inner telescopic rods 51, limiting the movement trajectory of the inner telescopic rods 51 relative to the impact disk 32. In this embodiment, the number of inner telescopic rods 51 is preferably four, corresponding to the number of outer telescopic rods 41 of the outer end centering component 4, forming a four-claw centering structure with internal and external coordination.

[0060] Furthermore, the inner telescopic rod 51 includes a housing 511 and a movable rod 512. The housing 511 is located inside the corresponding limiting rod 52, and there are four limiting rods 52 on the outside of the housing 511. The four limiting rods 52 form a frame-like moving space for the housing 511, limiting the moving path of the housing 511. The movable rod 512 is slidably inserted into one end of the housing 511 near the axis of the impact disc 32. The movable rod 512 can slide radially along the guide direction of the housing 511. An inner limiting wheel 513 is rotatably mounted on one end of the outer side of the sleeve 511. The axis of the inner limiting wheel 513 is perpendicular to the axis of the impact disc 32. The outer ring surface of the inner limiting wheel 513 rolls in contact with the outer surface of the inner end of the impact rod, thereby radially clamping and guiding the inner end of the impact rod. The movable rod 512 is elastically connected to the sleeve 511, preferably through a compression spring. Under the action of elastic force, the movable rod 512 drives the inner limiting wheel 513 to extend in the direction of the axis of the impact disc 32, thereby clamping the inner end of the impact rod.

[0061] Furthermore, each pair of adjacent sleeves 511 is connected by a linkage plate 518. The linkage plate 518 connects multiple sleeves 511 into an integral frame structure, improving the overall rigidity and stability of the inner end centering component 5 and ensuring the positional accuracy and action consistency of each inner telescopic rod 51.

[0062] The sleeve 511 has a transverse groove at the end away from the movable rod 512. A pull bar 514 is slidably inserted into the groove of the sleeve 511. The pull bar 514 can slide laterally along the groove of the sleeve 511 and cannot detach from the groove inside the sleeve 511. A pull rope 515 is fixed at one end of the movable rod 512 inside the sleeve 511. The other end of the pull rope 515 slides through the inner wall of the sleeve 511. The pull rope 515 is connected to the pull bar 514 at the outer end of the sleeve 511. When the pull bar 514 slides along the groove of the sleeve 511 away from the movable rod 512, the pull rope 515 is pulled, causing the movable rod 512 to overcome the elastic force and retract away from the axis of the impact disc 32. This causes the inner limit wheel 513 to release the inner end of the impact rod, thereby releasing the clamping on the inner end of the impact rod at the moment of firing and avoiding affecting the normal flight of the impact rod.

[0063] Furthermore, the pull rope 515 is installed in the middle of the pull bar 514 to ensure that the pull bar 514 is subjected to balanced force. A storage groove 517 is provided at the end of the pull bar 514 connected to the pull rope 515. When the pull bar 514 moves relative to the housing 511, the pull rope 515 can move into the storage groove 517. The storage groove 517 provides space for the pull rope 515 to be accommodated, preventing the pull rope 515 from being squeezed or stuck during the sliding of the pull bar 514. A push rod 516 is provided on the side of the pull bar 514 near the impact plate 32. The push rod 516 is installed on the end face of the impact plate 32. The position of the push rod 516 corresponds to that of the pull bar 514. The cross-sectional area of ​​the push rod 516 is smaller than that of the pull bar 514, so that the push rod 516 can extend into the groove of the housing 511 to push the pull bar 514 without interfering with the housing 511. When the impact disc 32 moves to a position near the muzzle within the impact head 31, the push rod 516 moves synchronously with the impact disc 32. The end of the push rod 516 contacts the pull bar 514 and pushes the pull bar 514 to slide along the groove of the housing 511, thereby pulling the movable rod 512 to retract via the pull rope 515, thus automatically releasing the inner limit wheel 513. At the same time, when the impact rod is pushed into the impact head 31, the four inner telescopic rods 51 are in an extended state, and the impact rod cannot be inserted between the four inner limit wheels 513. The impact rod first pushes the contacted inner telescopic rods 51 as a whole closer to the impact disc 32. The push rod 516 contacts the pull bar 514, pushes the pull bar 514 to pull the pull rope 515, and pulls the movable rod 512 into the housing 511. The impact rod can then move between the four inner limit wheels 513.

[0064] Furthermore, such as Figure 5 As shown, the inner wall of the impact head 31 away from its air inlet end is provided with a groove corresponding to each pull bar 514 and each limiting rod 52. The groove extends along the axial direction of the impact head 31. When the impact plate 32 is located at the outermost position inside the impact head 31, that is, the position closest to the muzzle, the pull bar 514 and the limiting rod 52 are respectively located inside the corresponding groove of the impact head 31. The groove provides a space for the pull bar 514 and the limiting rod 52 to avoid interference between the inner end centering component 5 and the inner wall of the impact head 31 when it moves with the impact plate 32. At the same time, when the impact plate 32 moves to this position, the push rod 516 pushes the pull bar 514 to slide in the groove, triggering the release action of the inner limit wheel 513.

[0065] The working principle is as follows: During the loading stage, the rotating cylinder 431 is rotated first. Through the transmission of the bevel ring 432 and the bevel gear 433, all the threaded shafts 412 rotate synchronously, causing the outer square telescopic rod 411 to drive the outer limit wheel 44 to retract outward, leaving space for loading. The impact rod is then inserted into the impact head 31 from the muzzle end. The inner end of the impact rod abuts against the inner end centering component 5 on the outer end face of the impact disc 32. The four inner telescopic rods 51 are in the extended state, and the impact rod cannot be inserted between the four inner limit wheels 513. The impact rod first pushes the contacted inner telescopic rods 51 as a whole. Approaching the impact plate 32, the push rod 516 contacts the pull bar 514, pushing the pull bar 514 to pull the pull rope 515, pulling the movable rod 512 into the sleeve 511. The impact rod can move between the four inner limit wheels 513 to achieve coaxial positioning of the inner end. Then, the rotating cylinder 431 is released. Under the action of the elastic element, the rotating cylinder 431 rotates, driving the outer square telescopic rod 411 to extend inward. The four outer limit wheels 44 simultaneously clamp the outer end of the impact rod to achieve coaxial positioning of the outer end. At this time, both the inner and outer ends of the impact rod are coaxially clamped, ensuring that the impact rod and the impact gun head 31 are strictly coaxial.

[0066] During the firing phase, the impact air pump 2 releases compressed air. The high-pressure gas acts on the air inlet end face of the impact disc 32, pushing the impact disc 32 to slide at high speed along the impact head 31 towards the muzzle. The impact disc 32 drives the inner end centering component 5 and the impact rod to move forward synchronously. When the impact disc 32 moves to a position close to the muzzle, the top rod 516 installed on the end face of the impact disc 32 contacts the pull bar 514 and pushes the pull bar 514 to slide along the groove of the sleeve 511. The pull bar 514 pulls the movable rod 512 to overcome the elastic force and contract through the pull rope 515, causing the inner limit wheel 513 to release the inner end of the impact rod. At the same time, the impact disc 32 applies an impact force to the impact rod. The impact rod continues to move forward under the action of inertia and flies out from the muzzle. The outer limit wheel 44 of the outer end centering component 4 plays a final radial guiding role when the impact rod flies out. After the impact rod flies out, the outer limit wheel 44 automatically resets under the action of the elastic restoring force of the rotating cylinder 431.

[0067] After the impact rod flies out, the impact disc 32 returns to its initial position under the action of the reset air pressure, the movable rod 512 of the inner centering component 5 extends again under the action of elastic force, and the inner limit wheel 513 returns to the clamping state, waiting for the next loading and firing.

[0068] Through the synergistic action of the outer end centering component 4 and the inner end centering component 5, coaxial positioning of the inner and outer ends of the impact rod is achieved. At the same time, it can coaxially position impact rods with different cross-sections, increasing the applicability range. It effectively solves the problem of misalignment of the impact rod installation in the prior art, which leads to tilting of the flight direction and large deviation of the impact point. It significantly improves the accuracy and repeatability of test data. Meanwhile, the space moving platform 1 achieves precise positioning of the muzzle within a large size range, the overall transmission component 43 of the outer end centering component 4 achieves synchronous opening and closing of multiple claws, and the linkage mechanism of the pull rope 515 of the inner end centering component 5 achieves automatic release at the moment of firing. The coordinated cooperation of each structure ensures that the equipment can maintain coaxial accuracy without affecting the normal firing of the impact rod.

[0069] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A dynamic impact testing device for hurricane-resistant doors and windows, comprising a spatial moving platform (1) and an impact air pump (2), wherein the spatial moving platform (1) controls the spatial movement of the impact air pump (2), characterized in that, Also includes: Impact assembly (3), the impact assembly (3) is connected to the space moving platform (1) and the impact air pump (2), the space moving platform (1) controls the space movement of the impact assembly (3), the impact air pump (2) provides air pressure power to the impact assembly (3), the impact assembly (3) includes an impact gun head (31) and an impact disc (32), the impact disc (32) is slidably inserted into the impact gun head (31), and the impact air pump (2) provides impact power for the movement of the impact disc (32) in the impact gun head (31); An outer end centering assembly (4) is installed at the outlet end of the impact assembly (3), and the outer end centering assembly (4) makes the impact rod coaxial with the impact assembly (3); The inner end centering component (5) is coaxially mounted on the outer end face of the impact plate (32), and the inner end centering component (5) is coaxial with the end of the impact rod located inside the impact component (3).

2. The hurricane-resistant door and window dynamic impact testing equipment according to claim 1, characterized in that: The outer end centering assembly (4) includes multiple outer telescopic rods (41) and a mounting cylinder (42). The mounting cylinder (42) is coaxially mounted on the outer end face of the impact gun head (31). The outer telescopic rods (41) and the mounting cylinder (42) are perpendicularly intersecting each other. The outer telescopic ends of the outer telescopic rods (41) are fixed to the mounting cylinder (42). The outer end centering component (4) also includes an overall transmission component (43), which simultaneously controls the extension and retraction of multiple external telescopic rods (41). An external limit wheel (44) is installed at one end of the external telescopic rod (41) near the axis of the impact gun head (31).

3. The hurricane-resistant door and window dynamic impact testing equipment according to claim 2, characterized in that: The external telescopic rod (41) includes an external square telescopic rod (411) and a threaded shaft (412). The outer end of the external square telescopic rod (411) is connected to the mounting cylinder (42). The inner telescopic end of the external square telescopic rod (411) is threaded onto the outside of the threaded shaft (412). The outer telescopic end of the external square telescopic rod (411) is rotatably sleeved onto the outside of the threaded shaft (412). The outer limit wheel (44) is installed at one end of the external square telescopic rod (411) near the axis of the impact gun head (31).

4. The hurricane-resistant door and window dynamic impact testing equipment according to claim 3, characterized in that: The overall transmission assembly (43) includes a rotating cylinder (431) and a bevel ring (432). The rotating cylinder (431) and the bevel ring (432) are coaxially mounted. The rotating cylinder (431) is rotatably sleeved on the outside of the impact gun head (31). The rotating cylinder (431) rotates elastically relative to the impact gun head (31). The threaded shaft (412) is coaxially mounted with a bevel gear (433) at one end outside the outer square telescopic rod (411), and the bevel gear (433) meshes with the bevel gear ring (432).

5. The hurricane-resistant door and window dynamic impact testing equipment according to claim 4, characterized in that: The inner end centering component (5) includes multiple inner telescopic rods (51), which are evenly distributed in a circumferential array around the axis of the impact disk (32). The axis of the inner telescopic rod (51) intersects perpendicularly with the axis of the impact disk (32). The outer telescopic end of the inner telescopic rod (51) moves horizontally elastically relative to the impact disk (32). A limiting rod (52) is sleeved at each of the four corners of the outer telescopic end of the inner telescopic rod (51). The limiting rod (52) is installed on the end face of the impact disk (32).

6. The hurricane-resistant door and window dynamic impact testing equipment according to claim 5, characterized in that: The inner telescopic rod (51) includes a sleeve (511) and a movable rod (512). The sleeve (511) is located inside the corresponding limiting rod (52). The movable rod (512) is slidably inserted into one end of the sleeve (511) near the axis of the impact plate (32). An inner limit wheel (513) is rotatably installed on one end of the movable rod (512) outside the sleeve (511). The movable rod (512) is elastically connected to the sleeve (511). The sleeve (511) has a horizontal groove at the end away from the movable rod (512). A pull bar (514) is slidably inserted into the groove of the sleeve (511). A pull rope (515) is fixed at one end of the movable rod (512) inside the sleeve (511). The other end of the pull rope (515) slides through the inner wall of the sleeve (511). The pull rope (515) is connected to the pull bar (514) at one end outside the sleeve (511).

7. The hurricane-resistant door and window dynamic impact testing equipment according to claim 6, characterized in that: The pull rope (515) is installed in the middle of the pull bar (514), and a top rod (516) is provided on the side of the pull bar (514) near the impact plate (32). The top rod (516) is installed on the end face of the impact plate (32).

8. The hurricane-resistant door and window dynamic impact testing equipment according to claim 7, characterized in that: The inner wall of the impact gun head (31) away from its air inlet end has grooves corresponding to each pull bar (514) and each limiting rod (52). The impact plate (32) is located at the outermost position inside the impact gun head (31). The pull bar (514) and the limiting rod (52) are respectively located inside the grooves corresponding to the impact gun head (31).

9. The hurricane-resistant door and window dynamic impact testing equipment according to claim 8, characterized in that: The pull bar (514) and the pull rope (515) are connected at one end and a storage groove (517) is provided. The pull bar (514) moves relative to the sleeve box (511) and the pull rope (515) moves into the storage groove (517). The cross-sectional area of ​​the top rod (516) is smaller than that of the pull bar (514). Each two adjacent sleeve boxes (511) are connected by a linkage plate (518).

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