A large-height drop environment test device

Abstract

The application discloses a large-height drop environment test device and relates to the technical field of drop test devices.The device comprises a tower, a lifting platform, a loading platform and a posture holding frame, a hoist is arranged on the tower, an impact platform is arranged below the tower, a guide rope is connected between the tower and the impact platform, the lifting platform and the loading platform slide along the guide rope and are connected through a releaser, the posture holding frame is fixed below the loading platform, a pair of rotating plates are hinged to the bottom of the posture holding frame, the rotating plates bear the measured object when being horizontal, and release the measured object when being turned downward, a trigger rod is arranged in the loading platform, the trigger rod contacts the bumper before the loading platform when the loading platform descends to be close to the impact platform, the rotating plates are unlocked by pulling the trigger rod to pull a bolt, and the automatic release is realized in a pure mechanical mode.The device is simple to install, no residual object falls with the measured object when being released, does not need to rely on an electric control signal trigger, and is high in reliability.

Description

Technical Field

[0001] This invention relates to the field of drop test equipment technology, specifically a high-altitude drop environment test equipment. Background Technology

[0002] Drop test apparatus is an important test device that uses the Earth's gravitational field to simulate the impact of the test object during an accidental drop. It is an important means of evaluating the product's structural strength and packaging protection performance by testing the product's drop resistance. However, as the drop height increases, the difficulty of controlling the product's attitude during the drop also increases. The traditional unrestrained free fall method is difficult to meet the requirements of the target impact attitude accuracy for high-height drop tests. The invention patent with publication number CN111397827A discloses a guided drop test system, including a drop frame, a guide rope, a guide steel frame, a lifting device, a primary release device and a secondary release device. The guide steel frame is sleeved on the guide rope and moves up and down along it. The lifting device is connected to the guide steel frame through the primary release device. The guide steel frame is provided with a secondary release device at the bottom. However, the aforementioned existing technologies still have the following shortcomings: First, the test product needs to be connected to the secondary release device via a flexible rope. Installation requires threading the rope through the product or hoisting the product into position, which is cumbersome. After the secondary release device activates, the rope remains attached to the test object and falls with it, preventing the test object from falling freely and potentially affecting the impact posture and test results. Second, the release action relies on the electronic control signal of the secondary release device. In scenarios involving high-altitude, high-speed falls, factors such as response delays in the electronic control signal and electromagnetic interference can cause deviations in the release timing. If the electronic control system malfunctions during the fall, the product will not be able to release at the predetermined height, affecting the test results. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention provides a high-altitude drop environment testing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-altitude drop environment testing device, comprising: The tower is fixed to the ground, and a hoist is fixedly installed on top of it; The impact platform is located on the ground directly below the tower. The guide rope is perpendicular to the impact platform, with its upper end fixedly connected to the top of the tower and its lower end fixedly connected to the impact platform. The lifting platform slides vertically up and down along the guide rope, and the steel wire rope of the hoist is connected to it. A release device is fixedly installed inside the platform. The loading platform slides vertically up and down along the guide rope. Inside it is a fixed connecting plate that matches the release device. The loading platform is connected to the lifting platform through the connecting plate and the release device. A pair of buffers, fixedly mounted on the impact platform, are used to cushion the descent of the loading platform; The attitude holding frame is fixedly connected to the loading platform at its top, and a pair of rotating plates are hinged to its bottom. The pair of rotating plates can switch between a horizontal state and a downward flipping state. When the pair of rotating plates is in the horizontal state, it can carry the object to be measured. When the rotating plates are flipped downward, the object to be measured can be released.

[0005] Preferably, a pair of rotating plates are hinged to the bottom of the attitude retainer via a rotating shaft. A chuck is fixedly installed on the rotating shaft. An installation block is fixedly installed inside the attitude retainer above the rotating shaft. A pin is slidably installed in the installation block along the vertical direction. The lower end of the pin contacts the chuck. When the pin is inserted into the chuck, it locks the plate and keeps it horizontal. When the pin is pulled upward, the chuck loses its constraint, allowing the plate to flip downward. A spring is installed on the installation block to push the pin downward.

[0006] Preferably, a sliding beam is movably installed inside the loading platform, and a pair of trigger rods that can slide vertically are installed on both sides of the loading platform. The two ends of the sliding beam are respectively connected to the upper ends of the pair of trigger rods. A connecting block is fixedly installed in the middle of the sliding beam. The pair of trigger rods are vertically aligned with a pair of buffers. A guide wheel is installed inside the attitude holding frame. A pull rope is connected to the top of the pin. The pull rope passes around the guide wheel and is fixedly connected to the connecting block. When the sliding beam moves upward, it can pull the pin upward by pulling the pull rope. When the loading platform descends, the trigger rods can contact the upper surface of the buffers before the loading platform.

[0007] Preferably, a pair of hydraulic cylinders are fixedly installed inside the lifting platform, and a pair of mounting cylinders are vertically installed inside the loading platform. A pair of connecting rods are slidably installed inside the pair of mounting cylinders. When the loading platform is connected to the lifting platform, the pair of hydraulic cylinders can push the pair of connecting rods to move downward. A pair of levers are hinged inside the loading platform, with the hinge point located between the two ends of the levers. A horizontal groove is opened at one end of the outer side of the levers. The bottom of the pair of connecting rods is fixedly connected to a pin that slides in the horizontal groove. One end of the inner side of the pair of levers abuts against the lower sides of the connecting block.

[0008] Preferably, a spring is provided above the mounting cylinder to push the connecting rod upward.

[0009] Preferably, the upper end of the trigger rod is provided with a U-shaped groove, and both ends of the slide beam are fixedly provided with inserts. The inserts are placed in the U-shaped groove, and one end of the insert has a protrusion with an outer diameter larger than the inner diameter of the U-shaped groove.

[0010] Preferably, the release device includes a block fixedly connected to the lifting platform, a clamping groove for inserting a connecting plate is provided in the block, a pair of clamping plates for clamping the connecting plate are provided on both sides of the clamping groove, and a pair of hydraulic cylinders for pushing the pair of clamping plates are fixedly provided on both sides of the block.

[0011] Preferably, a pair of extension plates are fixedly installed at the bottom of the block, and a hydraulic cylinder three is fixedly installed on the outer side of one of the pair of extension plates. An anti-detachment pin is fixedly connected to the telescopic end of the hydraulic cylinder three. The end of the anti-detachment pin can be inserted into the other extension plate. An anti-detachment hole matching the anti-detachment pin is opened on the connecting plate.

[0012] Preferably, there are four guide ropes, and guide cylinders that can be fitted onto the outside of the guide ropes are fixedly installed at the four corners of the lifting platform and the loading platform.

[0013] This invention provides a high-altitude drop environment testing device, which has the following beneficial effects: The attitude holding frame and a pair of hinged rotating plates below it support the object under test and maintain its attitude when the rotating plates are in a horizontal state. As the object under test descends with the loading platform, the object under test will not tilt or roll due to the lifting and limiting effect of the rotating plates. When released, the rotating plates flip downwards and the object under test falls naturally, thus realizing the integration of attitude holding and release. By cooperating with the trigger rod and the buffer, when the loading platform descends to near the impact platform, the trigger rod contacts the buffer before the loading platform. The transmission chain of the slide beam, connecting block, and pull rope automatically pulls the pin to unlock, causing the rotating plate to flip and release the object being tested. This achieves instantaneous automatic release before the loading platform contacts the buffer, without relying solely on external control signals. The action is reliable and the response is timely. This triggering structure adopts a purely mechanical transmission method. Compared with electrical control, mechanical triggering is not affected by electromagnetic interference and has a faster response speed. In high-speed drop scenarios, it can ensure that the rotating plate unlocks accurately at the predetermined time, ensuring the stability and repeatability of the release timing. By setting up a manual triggering mechanism consisting of a hydraulic cylinder, a lever, and a connecting rod, the operator can remotely control the hydraulic cylinder to move when the loading platform is at any height. The lever drives the connecting block to move upward, which in turn pulls the rope to unlock the rotating plate, thus realizing the manual release function. This complements the aforementioned automatic release method and provides two independent release modes to adapt to different test requirements. Attached Figure Description

[0014] Figure 1 This is an overall perspective view of the present invention; Figure 2 This is a partial perspective view of the impact platform in this invention; Figure 3 This is a perspective view of the lifting platform in this invention; Figure 4This is a three-dimensional cross-sectional view of the lifting platform in this invention; Figure 5 This is a perspective view of the release device in this invention; Figure 6 This is a perspective view of the loading platform and attitude holding frame in this invention; Figure 7 This is a three-dimensional cross-sectional view of the loading platform and attitude holding frame in this invention; Figure 8 for Figure 7 A magnified view of part A in the image; Figure 9 for Figure 7 A magnified view of part B in the image; Figure 10 for Figure 7 A magnified view of part C.

[0015] In the diagram: 1. Tower; 2. Hoist; 3. Impact platform; 4. Guide rope; 5. Hoisting platform; 6. Release device; 7. Loading platform; 8. Connecting plate; 9. Buffer; 10. Attitude retainer; 11. Turning plate; 12. Rotating shaft; 13. Chuck; 14. Mounting block; 15. Pin; 16. Slide beam; 17. Trigger rod; 18. Connecting block; 19. Guide wheel; 20. Pull rope; 21. Hydraulic cylinder one; 22. Mounting cylinder; 23. Connecting rod; 24. Lever; 25. Horizontal slide; 26. Pin; 27. Spring one; 28. U-shaped groove; 29. ​​Insert block; 30. Block; 31. Clamping groove; 32. Clamping plate; 33. Hydraulic cylinder two; 34. Extension plate; 35. Hydraulic cylinder three; 36. Anti-detachment pin; 37. Anti-detachment hole; 38. Spring two; 39. Hydraulic station. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0017] Please see Figures 1-10 The present invention provides a technical solution: a high-altitude drop environment testing device, comprising: Tower 1 is fixed to the ground, and hoist 2 is fixedly installed on top of it; Impact platform 3 is located on the ground directly below tower 1, and the object being tested will come into contact with the platform when it falls. The guide rope 4 is perpendicular to the impact platform 3, with its upper end fixedly connected to the top of the tower 1 and its lower end fixedly connected to the impact platform 3. The lifting platform 5 slides vertically up and down along the guide rope 4. The wire rope of the hoist 2 is connected to it, and a release device 6 is fixedly installed inside it. The height of the lifting platform 5 can be controlled by the hoist 2. The loading platform 7 slides vertically up and down along the guide rope 4. Inside it is a fixed connecting plate 8 that matches the release device 6. The loading platform 7 is connected to the lifting platform 5 through the connecting plate 8 and the release device 6. A pair of buffers 9 are fixedly mounted on the impact platform 3 to buffer the descending loading platform 7; The attitude holding frame 10 is fixedly connected to the loading platform 7 at its top, and a pair of rotating plates 11 are hinged below it. The pair of rotating plates 11 can switch between a horizontal state and a downward flipping state. When the pair of rotating plates 11 are in the horizontal state, they can carry the object to be measured and maintain the attitude of the object to be measured during the descent. When the rotating plates 11 are flipped downward, they can release the object to be measured.

[0018] Furthermore, a pair of rotating plates 11 are hinged to the bottom of the attitude retainer 10 via a rotating shaft 12. A chuck 13 is fixedly mounted on the rotating shaft 12. An installation block 14 is fixedly mounted inside the attitude retainer 10 above the rotating shaft 12. A pin 15 is slidably mounted in the vertical direction inside the installation block 14. The lower end of the pin 15 contacts the chuck 13. When the pin 15 is inserted into the chuck 13, it locks the plate 11, keeping it horizontal. When the pin 15 is pulled out upwards, the chuck 13 is unrestrained, allowing the plate 11 to flip downwards. A spring 38 is provided on the installation block 14 to push the pin 15 downwards, providing a thrust for the pin 15 to insert into the chuck 13.

[0019] Furthermore, a sliding beam 16 is movably installed inside the loading platform 7. A pair of trigger rods 17 that can slide vertically are installed on both sides of the loading platform 7. The two ends of the sliding beam 16 are connected to the upper ends of the pair of trigger rods 17 respectively. A connecting block 18 is fixedly installed in the middle of the sliding beam 16. The pair of trigger rods 17 are vertically aligned with the pair of buffers 9. A guide wheel 19 is installed inside the attitude holding frame 10. A pull rope 20 is connected to the top of the pin 15. The pull rope 20 passes around the guide wheel 19 and is fixedly connected to the connecting block 18. When the sliding beam 16 moves upward, it can pull the pin 15 upward through the pull rope 20. When the loading platform 7 descends, the trigger rods 17 can contact the upper surface of the buffer 9 before the loading platform 7. When the two contact, the trigger rods 17 drive the sliding beam 16 to move upward. At this time, the pull rope 20 is pulled. The pull rope 20 pulls the pin 15 to open the pair of rotating plates 11, so as to release the test object before the loading platform 7 contacts the upper surface of the buffer 9.

[0020] Furthermore, a pair of hydraulic cylinders 21 are fixedly installed inside the lifting platform 5, and a pair of mounting cylinders 22 are vertically installed inside the loading platform 7. A pair of connecting rods 23 are slidably installed inside the mounting cylinders 22. When the loading platform 7 is connected to the lifting platform 5, the pair of hydraulic cylinders 21 can push the pair of connecting rods 23 to move downward. A pair of levers 24 are hinged inside the loading platform 7, with the hinge point located between the two ends of the levers 24. A horizontal groove 25 is opened at one end of the outer side of the levers 24. A pin 26 that slides in the horizontal groove 25 is fixedly connected to the bottom of the pair of connecting rods 23. One end of the inner side of the pair of levers 24 abuts against the lower sides of the connecting block 18. When the connecting rods 23 move downward, they can push one end of the lever 24 downward. At this time, one end of the lever 24 moves upward, pushing the connecting block 18 upward and pulling the pull rope 20, thereby triggering the rotating plate 11 to flip downward by starting the hydraulic cylinders 21.

[0021] Furthermore, a spring 27 is provided above the mounting cylinder 22 to push the connecting rod 23 upward, which is used to reset the connecting rod 23.

[0022] Furthermore, a U-shaped groove 28 is provided at the upper end of the trigger rod 17, and two insert blocks 29 are fixedly provided at both ends of the slide beam 16. The insert blocks 29 are placed in the U-shaped groove 28 to ensure that the slide beam 16 can move upward when the trigger rod 17 moves upward. At the same time, the angle between the slide beam 16 and the trigger rod 17 can be slightly offset. One end of the outer side of the insert block 29 has a protrusion with an outer diameter larger than the inner diameter of the U-shaped groove 28 to prevent it from sliding out of the U-shaped groove 28.

[0023] Furthermore, the release device 6 includes a block 30 fixedly connected to the lifting platform 5. The block 30 has a clamping groove 31 for inserting the connecting plate 8. A pair of clamping pieces 32 for clamping the connecting plate 8 are provided on both sides of the clamping groove 31. A pair of hydraulic cylinders 33 for pushing the pair of clamping pieces 32 are fixedly provided on both sides of the block 30. The connecting plate 8 can be clamped in the clamping groove 31 by the hydraulic cylinders 33.

[0024] Furthermore, a pair of extension plates 34 are fixedly installed at the bottom of the block 30. A hydraulic cylinder 35 is fixedly installed on the outer side of one of the extension plates 34. An anti-detachment pin 36 is fixedly connected to the telescopic end of the hydraulic cylinder 35. The end of the anti-detachment pin 36 can be inserted into the other extension plate 34. An anti-detachment hole 37 matching the anti-detachment pin 36 is provided on the connecting plate 8. When the connecting plate 8 is located in the clamping groove 31, the connecting plate 8 and the block 30 can be connected by a pin by inserting the anti-detachment pin 36 into the anti-detachment hole 37.

[0025] Furthermore, there are four guide ropes 4, and guide cylinders that can be fitted onto the outside of the guide ropes 4 are fixedly installed at the four corners of the lifting platform 5 and the loading platform 7, so as to restrict the movement path of the lifting platform 5 and the loading platform 7 by means of the guide ropes 4.

[0026] Furthermore, the platform 5 is equipped with a hydraulic station 39 for driving hydraulic cylinder 21, hydraulic cylinder 33, and hydraulic cylinder 35. The hydraulic station 39 can be remotely controlled via wireless devices to control the start of each hydraulic cylinder.

[0027] Working principle and usage process of this invention: During the preparation stage, the lifting platform 5 is adjusted to a low position by the lifting machine 2, the connecting plate 8 is connected to the release device 6, the rotating plate 11 is adjusted to a horizontal state, and the object to be tested is placed on the rotating plate 11. The drop height is adjusted by using the hoist 2 to wind up the wire rope, raising the hoisting platform 5 and loading platform 7 to the required test height; Fall Method 1: Automatic Release While Maintaining Posture After the lifting platform 5 drives the loading platform 7 to the predetermined height, the safety of the connecting plate 8 is first released. The hydraulic cylinder 35 controlled by the hydraulic station 39 is used to pull the anti-detachment pin 36 out of the connecting plate 8. At this time, the connecting plate 8 is only connected to the release device 6 by the clamp 32 pushed by the hydraulic cylinder 33. After the hydraulic cylinder 33 is controlled to retract, the connecting plate 8 is released. The loading platform 7 descends freely along the guide rope 4. During the descent, the rotating plate 11 is used to maintain the attitude of the test object. When the loading platform 7 contacts the buffer 9, the trigger rod 17 contacts the buffer 9 before the loading platform 7. When the trigger rod 17 is pushed upward, it will drive the slide beam 16 and the connecting block 18 to rise. The pin 15 is pulled upward from the chuck 13 by the pull rope 20. The chuck 13 loses its constraint and the rotating plate 11 can flip downward. At this time, the test object loses the support of the rotating plate 11, and the test object is automatically released at the set height from the impact platform 3. This avoids the test object from being tilted or rolled during the descent, which would affect the test results. Fall Method 2: Manually Release Free Fall After the lifting platform 5 drives the loading platform 7 to the predetermined height, the hydraulic station 39 controls the extension of the hydraulic cylinder 21. The extension end of the hydraulic cylinder 21 pushes the connecting rod 23, and the connecting rod 23 pushes one end of the lever 24, which in turn pushes the other end of the lever 24 upward to push the connecting block 18, thereby pulling the rope 20, opening the rotating plate 11 to release the test object, and completing the drop test.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-altitude drop environment testing device, characterized in that, include: A tower (1) is fixed on the ground, and a hoist (2) is fixedly installed on its top; The impact platform (3) is located on the ground directly below the tower (1); The guide rope (4) is perpendicular to the impact platform (3), with its upper end fixedly connected to the top of the tower (1) and its lower end fixedly connected to the impact platform (3); The lifting platform (5) slides vertically up and down along the guide rope (4), and the wire rope of the hoist (2) is connected to it. A release device (6) is fixedly installed inside it. The loading platform (7) slides vertically up and down along the guide rope (4), and a connecting plate (8) matching the release device (6) is fixedly installed inside it. The loading platform (7) is connected to the lifting platform (5) through the connecting plate (8) and the release device (6). A pair of buffers (9) are fixedly mounted on the impact platform (3) to buffer the falling loading platform (7); The attitude holding frame (10) is fixedly connected to the loading platform (7) at its top and has a pair of rotating plates (11) hinged below it. The pair of rotating plates (11) can switch between a horizontal state and a downward flipping state. When the pair of rotating plates (11) are in a horizontal state, they can carry the object to be measured. When the rotating plates (11) are flipped downward, they can release the object to be measured.

2. The high-altitude drop environment testing device according to claim 1, characterized in that, A pair of rotating plates (11) are hinged to the bottom of the attitude retainer (10) via a rotating shaft (12). A chuck (13) is fixedly installed on the rotating shaft (12). An installation block (14) is fixedly installed inside the attitude retainer (10) above the rotating shaft (12). A pin (15) is slidably installed in the vertical direction inside the installation block (14). The lower end of the pin (15) contacts the chuck (13). When the pin (15) is inserted into the chuck (13), it locks it, keeping the rotating plate (11) in a horizontal state. When the pin (15) is pulled out upward, the chuck (13) loses its constraint, allowing the rotating plate (11) to flip downward. A spring (38) is provided on the installation block (14) to push the pin (15) downward.

3. The high-altitude drop environment testing device according to claim 1, characterized in that, A sliding beam (16) is movably installed inside the loading platform (7). A pair of trigger rods (17) that can slide vertically are installed on both sides of the loading platform (7). The two ends of the sliding beam (16) are connected to the upper ends of the pair of trigger rods (17). A connecting block (18) is fixedly installed in the middle of the sliding beam (16). The pair of trigger rods (17) are vertically aligned with the pair of buffers (9). A guide wheel (19) is installed inside the attitude retainer (10). A pull rope (20) is connected to the top of the pin (15). The pull rope (20) passes around the guide wheel (19) and is fixedly connected to the connecting block (18). When the sliding beam (16) moves upward, it can pull the pin (15) upward through the pull rope (20). When the loading platform (7) descends, the trigger rods (17) can contact the upper surface of the buffer (9) before the loading platform (7).

4. The high-altitude drop environment testing device according to claim 3, characterized in that, A pair of hydraulic cylinders (21) are fixedly installed inside the lifting platform (5). A pair of mounting cylinders (22) are vertically installed inside the loading platform (7). A pair of connecting rods (23) are slidably installed inside the mounting cylinders (22). When the loading platform (7) is connected to the lifting platform (5), the pair of connecting rods (23) can be pushed downward by the pair of hydraulic cylinders (21). A pair of levers (24) are hinged inside the loading platform (7). The hinge point is located between the two ends of the levers (24). A horizontal groove (25) is opened at one end of the outer side of the levers (24). A pin (26) that slides in the horizontal groove (25) is fixedly connected to the bottom of the pair of connecting rods (23). One end of the inner side of the pair of levers (24) abuts against the lower sides of the connecting block (18).

5. The high-altitude drop environment testing device according to claim 4, characterized in that, A spring (27) is provided above the mounting cylinder (22) to push the connecting rod (23) upward.

6. The high-altitude drop environment testing device according to claim 3, characterized in that, The upper end of the trigger rod (17) is provided with a U-shaped groove (28), and both ends of the slide beam (16) are fixedly provided with inserts (29). The inserts (29) are placed in the U-shaped groove (28), and one end of the insert (29) has an outer diameter larger than the inner diameter of the U-shaped groove (28).

7. The high-altitude drop environment testing device according to claim 1, characterized in that, The release device (6) includes a block (30) fixedly connected to the lifting platform (5). The block (30) has a clamping groove (31) for inserting the connecting plate (8). A pair of clamping plates (32) for clamping the connecting plate (8) are provided on both sides of the clamping groove (31). A pair of hydraulic cylinders (33) for pushing the pair of clamping plates (32) are fixedly provided on both sides of the block (30).

8. The high-altitude drop environment testing device according to claim 7, characterized in that, A pair of extension plates (34) are fixedly installed at the bottom of the block (30). A hydraulic cylinder three (35) is fixedly installed on the outer side of one of the pair of extension plates (34). An anti-detachment pin (36) is fixedly connected to the telescopic end of the hydraulic cylinder three (35). The end of the anti-detachment pin (36) can be inserted into the other extension plate (34). An anti-detachment hole (37) matching the anti-detachment pin (36) is opened on the connecting plate (8).

9. The high-altitude drop environment testing device according to claim 1, characterized in that, There are four guide ropes (4), and guide cylinders that can be fitted onto the outside of the guide ropes (4) are fixed at the four corners of the lifting platform (5) and the loading platform (7).

Images