Repeated jettisoning test device and method

Abstract

The invention provides a repeated jettisoning test device and method. The repeated jettisoning test device comprises a rack, a jettisoning piece, a lifting assembly and a disengaging mechanism. The throwing piece is connected to the rack in a sliding mode and moves in the throwing direction, and the throwing piece is provided with a connecting end used for being connected with a hanging basket and a telescopic plunger; the lifting assembly drives the movable end of the lifting assembly to move upwards or downwards and is used for moving upwards to push the plunger to be lifted or moving downwards to push the plunger to retract. The separating mechanism is installed on the machine frame, and the separating mechanism is provided with an abutting end arranged on the lifting track of the plunger. A structure capable of repeatedly throwing the hanging basket is formed by the rack, the throwing part, the lifting assembly and the separation mechanism, the throwing part can be driven to carry out repeated actions during lifting and free falling throwing under the reciprocating action of the lifting action of the lifting assembly, a repeated throwing test of the hanging basket is carried out, separation of hoisted heavy objects below can be automatically completed, and the work efficiency is improved. Manual repeated hooking is avoided, and the circulation time is short.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drop test, in particular to a repeated drop test device and method. BACKGROUND

[0002] As an aircraft, the service life of a hot air balloon needs to be specified during operation, so that the hot air balloon is always in airworthiness state within the service life, and the life and property safety of the hot air balloon crew is ensured. In the process of evaluating the service life of the hot air balloon, the durability of the basket frame welding structure is taken as the basis for judging the service life of the basket, and the basket needs to be subjected to repeated and uninterrupted landing impact test to observe the deformation or cracks of the basket frame structure caused by repeated impact. For example, Chinese patent 201410385124.6 discloses a drop test device, which lifts the tested object by hoisting, and then separates to perform impact test.

[0003] Currently, there is also a way to adjust the length of the lifting rope so that the drop height is less than the length of the lifting rope, so as to reduce the repeated hooking and connecting of the tested object.

[0004] However, since the drop height needs to be less than the total length of the lifting rope, during lifting, the length of the rope greater than the drop height needs to be hoisted first, then the basket needs to be clamped and positioned, and the length of the paper rope greater than the drop height also needs to be unwound, and finally the next drop action can be performed. Therefore, there is still the problem of low efficiency and complicated steps in repeated drop test. SUMMARY The present application aims to overcome the above technical deficiencies and provide a repeated drop test device to solve the technical problems of low efficiency and complicated steps in repeated drop test in the prior art.

[0005] To achieve the above technical purposes, the present application adopts the following technical solutions: In a first aspect, the present application provides a repeated drop test device, comprising: a rack; a drop part connected to the rack in a sliding manner and moving in a drop direction, the drop part being provided with a connecting end for connecting a basket and a telescopic plunger; a lifting assembly, the lifting assembly driving the movable end to move upward or downward, for pushing the plunger upward to lift or pushing the plunger downward to retract; and a separation mechanism mounted on the rack, the separation mechanism having a pushing end arranged on the lifting track of the plunger, for pushing the plunger to retract and separate from the movable end of the lifting assembly when the movable end of the lifting assembly moves upward, forming the free fall of the drop part.

[0006] In some embodiments, the movable end of the lifting assembly has an end face and an inclined face arranged in sequence in the throwing direction, the plunger top is provided with a first inclined plane matching the inclined face, the pushing end is provided with a second inclined plane matching the first inclined plane, and the pushing end is staggered with the movable end of the lifting assembly.

[0007] In some embodiments, a buffering assembly is further included, which is installed on the rack and arranged in the throwing direction of the throwing piece, for elastically buffering the throwing piece and preventing it from being detached downward from the rack.

[0008] In some embodiments, the buffering assembly includes a support frame, a buffering pad, a lifting frame and a linkage structure, the support frame is installed on the rack and arranged at the bottom end of the throwing direction of the throwing piece, the buffering pad is detachably installed on the top of the lifting frame, the lifting frame is slidingly connected to the support frame, and the linkage structure is connected to the lifting frame and the lifting assembly at two ends, for transmitting the lifting and lowering of the lifting assembly to drive the lifting frame to lower and lift, so that the lifting frame lifts the throwing piece and the movable end of the lifting assembly lowers and moves at the same time.

[0009] In some embodiments, the linkage structure includes a first rack, a gear and a second rack, the gear is rotationally connected to the rack, the first rack is fixedly connected to the lifting frame, the second rack is connected to the movable end of the lifting assembly, the first rack and the second rack are both engaged with the gear and symmetrically arranged on both sides of the gear, the rack is provided with guide cylinders corresponding to the first rack and the second rack, and the first rack and the second rack are respectively slidingly connected to the corresponding guide cylinders.

[0010] In some embodiments, the throwing piece includes a sliding block and a passive link, the passive link is connected to the bottom of the sliding block, and the sliding block is slidingly connected to the rack.

[0011] In some embodiments, a through hole is formed in the sliding block, the plunger is slidingly connected in the through hole, one side of the sliding block is detachably connected with a cover plate, the cover plate is provided with a mounting hole corresponding to the through hole, a bolt is inserted between the mounting hole and the through hole, a spring is sleeved outside the bolt, and the two ends of the spring are respectively abutted with the cover plate and the plunger.

[0012] In some embodiments, at least two inductive proximity switches are installed on the rack.

[0013] In some embodiments, the lifting assembly includes a hydraulic cylinder push rod, and the hydraulic cylinder push rod is installed on the rack.

[0014] In a second aspect, the present application also provides a repeated release test method, comprising the following steps: S1, connecting the release part with the basket through the flexible connecting part, and the plunger is in an initial extended position; S2, driving the movable end of the lifting assembly to rise, pushing the plunger, and driving the release part to rise; S3, continuously lifting to the disengagement mechanism position, moving the plunger to the pushing end of the disengagement mechanism, and the pushing end pushes the plunger to retract and disengage in the upward movement of the plunger, forming the free fall of the release part and the basket, and performing a release test, and the plunger is extended to the initial position; S4, then lowering the movable end of the lifting assembly, and under the pushing of the movable end, the plunger retracts, the movable end moves to below the plunger, and the plunger is extended to the initial position; S5, repeating steps S2 to S4, and repeated release test can be formed.

[0015] Compared with the prior art, the repeated release test device and method provided by the present application can repeatedly release the basket through the rack, the release part, the lifting assembly and the disengagement mechanism. Under the reciprocating lifting action of the lifting assembly, the release part can repeatedly act in the lifting and free fall release, and the repeated release test of the basket can be performed. The disengagement of the lifting of the heavy object below can be automatically completed, manual repeated hooking is avoided, the cycle time is short, and the operation time can be greatly saved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a three-dimensional structure of the repeated release test device provided by the embodiment of the present application; Figure 2 is a partial bottom view of the repeated release test device provided by the embodiment of the present application; Figure 3 is a partial sectional view of the repeated release test device provided by the embodiment of the present application; Figure 4 is a structure front view of the repeated release test device provided by the embodiment of the present application; Figure 5 is a linkage structure front view of the repeated release test device provided by the embodiment of the present application; Figure 6 is a telescopic control principle diagram of the repeated release test device provided by the embodiment of the present application.

[0017] Explanation of reference signs: 1, rack; 101, inductive proximity switch; 2, release part; 201, connecting end; 202, plunger; 202a, first inclined plane; 21, sliding block; 211, through hole; 212, cover plate; 213, bolt; 214, spring; 22, passive connecting rod; 3, lifting assembly; 301, end face; 302, inclined surface; 31, hydraulic cylinder push rod; 311, electromagnetic valve; 312, pump body; 313, oil cylinder piston rod; 4, disengagement mechanism; 401, pushing end; 401a, second inclined plane; 5, buffer assembly; 51, support frame; 52, buffer pad plate; 53, lifting frame; 54, linkage structure; 541, first rack; 542, gear; 543, second rack; 544, guide cylinder; 6, control box; 7, basket. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0019] In order to solve the technical problems of low efficiency and complicated steps of repeated drop test, the present application provides a repeated drop test device, which can realize the structure of repeated drop basket composed of rack 1, drop piece 2, lifting assembly 3 and disengagement mechanism 4. Under the reciprocating lifting action of the lifting assembly 3, the drop piece 2 can be driven to perform repeated actions of lifting and free-fall drop, and the repeated drop test of the basket can be performed. The disengagement of lifting the heavy object below can be automatically completed, manual repeated hooking is avoided, the cycle time is short, and the operation time can be greatly saved.

[0020] It should be noted that the repeated drop test device described in the present application is used for but not limited to basket drop test, etc. For the convenience of description, in the present application, only the repeated drop test device applied to the basket drop test is taken as an example for description, and the principle of the repeated drop test device applied to other types of equipment is substantially the same as that applied to the basket drop test, which is not described here.

[0021] Please refer to Figures 1-5The application provides a repeated throwing and releasing test device, which comprises a rack 1, a throwing and releasing part 2, a lifting assembly 3 and a separation mechanism 4. The throwing and releasing part 2 is slidably connected to the rack 1 and moves along a throwing and releasing direction. A limiting guide rail is installed on the rack 1 and used for limiting the vertical falling of the throwing and releasing part 2 along a direction perpendicular to the ground. A connecting end 201 for connecting a basket is arranged on the throwing and releasing part 2, and the connecting end 201 is flexibly connected with the basket. The rope is used to connect the basket, and the length of the rope can be adjusted according to the falling height of the weight. A telescopic plunger 202 is arranged on the throwing and releasing part 2. The movable end of the lifting assembly 3 is provided with an end face 301 and an inclined face 302 arranged along the throwing and releasing direction in sequence. The lifting assembly 3 drives the movable end to move upwards or downwards. When the movable end moves upwards, the end face 301 pushes the plunger 202 to lift. When the movable end moves downwards, the inclined face 302 pushes the plunger 202 to retract. The separation mechanism 4 is installed on the rack 1, and the separation mechanism 4 is provided with a pushing end 401 arranged on the lifting track of the plunger. When the movable end of the lifting assembly 3 moves upwards, the pushing end 401 pushes the plunger 202 to retract and separates from the end face 301, so as to form the free falling of the throwing and releasing part 2.

[0022] In the embodiment, the lifting assembly 3 first drives the movable end to move upwards, the end face 301 abuts to the bottom surface of the plunger 202, the plunger 202 and the whole throwing and releasing part 2 are lifted together, and are lifted to the height position of the separation mechanism 4. Under the pushing of the pushing end 401, the plunger 202 is pushed to retract, the plunger 202 separates from the end face 301, and then the throwing and releasing part 2 falls downwards. After the falling, the movable end of the lifting assembly 3 moves downwards, moves to the position of the plunger 202, pushes the plunger 202 to retract, and then the plunger 202 is located above the end face 301 again, is extended to the top of the end face 301, and the lifting assembly 3 drives the movable end to move upwards again, so as to perform the lifting and throwing and releasing action again.

[0023] Further, please refer to Figure 5 In order to perform the automatic control reciprocating extension and retraction process, the lifting assembly 3 comprises a hydraulic cylinder push rod 31, the hydraulic cylinder push rod 31 is installed on the rack 1, and at least two inductive proximity switches 101 are installed on the rack 1. A control box 6 is further installed on the rack 1 and used for logical control.

[0024] Specifically, the hydraulic cylinder push rod 31 includes an electromagnetic valve 311, a pump body 312, and an oil cylinder piston rod 313. The driving motor of the pump body 312 drives the pump to provide power for the operation of the system. The pipeline connects the pump body 312, the electromagnetic valve 311, and the oil cylinder of the oil cylinder piston rod 313. The hydraulic oil from the pump body 312 passes through the electromagnetic valve 311 to the oil cylinder of the oil cylinder piston rod 313. The inductive proximity switch 101 in the system is in a constant on state, and when an object approaches, the switch is turned off. A certain time interval, such as 10s, is set in the system in advance. The control box 6 circulates the electrical signals on both sides of the electromagnetic valve to make the piston rod of the oil cylinder piston rod 313 extend and retract. The lower end of the piston rod of the oil cylinder piston rod 313 is connected to a fixed block, that is, the movable end of the lifting assembly 3. The fixed block moves up and down with the extension and retraction of the piston rod. When the left side of the electromagnetic valve 311 is powered on, the piston rod of the oil cylinder piston rod 313 extends, and the fixed block moves downward. The fixed block side is provided with a top block, and the top of the top block is an end face 301, and the bottom of the top block is an inclined surface 302. The inclined surface 302 of the top block pushes the plunger 202 to move left, and then the plunger rebounds under the action of the spring. The fixed block continues to move downward, and when the fixed block moves to the position of the inductive proximity switch 101 below, the electromagnetic valve is powered off, and the piston rod no longer continues to extend. When the right side of the electromagnetic valve 311 is powered on, the piston rod of the oil cylinder piston rod 313 retracts, and the fixed block moves upward. The top block on the side of the fixed block lifts the plunger, and then lifts the weight below. When the piston rod lifts the plunger to the position of the abutting end 401, the abutting end 401 pushes the plunger to move left, and the plunger falls off, and the weight falls. When the fixed block moves to the position of the inductive proximity switch 101 above, the electromagnetic valve 311 is powered off, and the piston rod no longer continues to retract. Complete a cycle of lifting and falling of the weight.

[0025] It can be understood that the lifting assembly 3 device can adopt hydraulic transmission. The motor drives the gear pump to work. The hydraulic oil at the gear pump reaches the oil cylinder through the three-position four-way electromagnetic valve to control the extension and retraction of the oil cylinder piston rod. The three-position four-way electromagnetic valve is controlled by the control box. The single-chip microcomputer in the control box controls the electromagnetic valve to be powered on / off at a certain time interval, so that the oil cylinder piston rod performs cyclic extension and retraction action.

[0026] Further, in order to effectively push the plunger 202 to shrink in the lifting action, the top of the plunger 202 is provided with a first inclined plane 202a matched with the inclined surface 302, and the abutting end 401 is provided with a second inclined plane 401a matched with the first inclined plane 202a. The abutting end 401 is staggered with the movable end of the lifting assembly 3 to avoid the movable end from hitting the abutting end 401.

[0027] In one embodiment, please refer to Figure 4 and Figure 5In order to limit the falling of the throwing part 2, a buffer assembly 5 is installed on the frame 1 and arranged in the throwing direction of the throwing part 2, used for buffering the throwing part 2 and preventing it from falling off the frame 1.

[0028] The throwing part 2 comprises a sliding block 21 and a passive connecting rod 22 connected to the bottom of the sliding block 21, and the sliding block 21 is slidingly connected to the frame 1.

[0029] Further, in order to shorten the lifting stroke of the lifting assembly 3 and improve the efficiency of the next throwing test, the buffer assembly 5 comprises a supporting frame 51, a buffer pad 52, a lifting frame 53 and a linkage structure 54. The supporting frame 51 is installed on the frame 1 and arranged at the bottom end of the throwing direction of the throwing part 2. The buffer pad 52 is detachably installed on the top of the lifting frame 53. The buffer pad 52 is used to slide the sliding block 21 of the throwing part 2 and prevent it from falling off the frame 1, so as to facilitate the next repeated throwing action. The lifting frame 53 is slidingly connected to the supporting frame 51. The two ends of the linkage structure 54 are connected to the lifting frame 53 and the lifting assembly 3 respectively. The linkage structure 54 is used to drive the lifting frame 53 to lift and lower, so as to form the lifting of the throwing part 2 by the lifting frame 53 and the lowering of the movable end of the lifting assembly 3 at the same time. When the movable end of the lifting assembly 3 is extended downward, the linkage structure 54 drives the lifting frame 53 to move upward, thereby shortening the stroke of the movable end and the plunger 202 on the sliding block 21. Conversely, when the lifting assembly 3 is lifted, the buffer pad 52 is not fixed with the plunger 202. When the end surface 301 is lifted, the plunger 202 is separated from the buffer pad 52. The buffer pad 52 moves downward and returns to the initial position, while the plunger 202 moves upward to the throwing position for throwing.

[0030] Specifically, the linkage structure 54 comprises a first rack 541, a gear 542 and a second rack 543. The gear 542 is rotationally connected to the frame 1. The first rack 541 is fixedly connected to the lifting frame 53. The second rack 543 is connected to the movable end of the lifting assembly 3. The first rack 541 and the second rack 543 are both meshed with the gear 542 and symmetrically arranged on both sides of the gear 542. The frame 1 is provided with a guide cylinder 544 corresponding to the first rack 541 and the second rack 543. The first rack 541 and the second rack 543 are slidingly connected to the corresponding guide cylinder 544. When the movable end of the lifting assembly 3 moves, the second rack 543 moves, thereby driving the gear 542 to rotate, and further driving the first rack 541 to move in the opposite direction, thereby forming the required transmission effect.

[0031] It can be understood that the buffer plate 52 is just moved to the initial position to limit and buffer the throwing element 2 from below when the throwing position is separated from the end face 301 of the plunger 202.

[0032] Further, in order to facilitate the replacement of the plunger 202, a through hole 211 is formed on the sliding block 21, the plunger 202 is slidingly connected in the through hole 211, one side of the sliding block 21 is detachably connected with a cover plate 212, the cover plate 212 is provided with a mounting hole corresponding to the through hole 211, a bolt 213 is inserted between the mounting hole and the through hole 211, the outer side of the bolt 213 is sleeved with a spring 214, the two ends of the spring 214 are respectively abutted with the cover plate 212 and the plunger 202, by disassembling the cover plate 212 and the bolt 213, the plunger 202 can be replaced.

[0033] It can be understood that the movable end of the lifting assembly 3, the plunger 202 and the pushing end 401 are prone to wear during the cycle lifting process, and the three parts are connected and fixed with the corresponding structure through the bolt, which can be replaced in time after wear without affecting the continuous test.

[0034] In order to better understand the present application, the following is combined with Figures 1 to 5 The technical scheme of the present application is described in detail: the connecting end 201 on the throwing element 2 is connected with the basket 7 through a rope; the lifting assembly 3 drives the movable end to rise, the movable end is a fixed block, a top block is detachably connected to the fixed block, the end face 301 is located at the top of the top block, and the inclined surface 302 is located at the bottom of the top block; during the rising process, the end face 301 pushes the bottom of the plunger 202 on the throwing element 2 to lift the throwing element 2; at the position of the disengagement mechanism 4, there is a pushing end 401 detachably connected to the rack 1, the plunger 202 is retracted by the pushing end 401 to disengage from the end face 301, and the throwing and falling is formed; the basket contacts the ground first, and then the sliding block 21 of the throwing element 2 collides with the buffer assembly 5; then the next throwing preparation is carried out, the movable end of the lifting assembly 3 descends to push the plunger 202 to retract, and then rebounds, at the same time, the quota and linkage structure 54 can lift the throwing element 2 by the lifting frame 53, the stroke of the plunger 202 re-abutting to the end face 301 is shortened, and when the plunger 202 abuts to the end face 301, the throwing action is carried out according to the above steps again.

[0035] The present application also provides a throwing and falling test method, comprising the following steps: S1, the throwing element 2 is connected with the basket through a flexible connecting piece, and the plunger 202 is initially in an extended position state; S2, the lifting assembly 3 drives the movable end to rise, so that the end face 301 pushes the plunger 202 to lift the throwing element 2; S3, continuously lifting to the position of the disengaging mechanism 4, the plunger 202 moves to the pushing end 401 of the disengaging mechanism 4, the pushing end 401 pushes the plunger 202 to retract the disengaging end face 301 in the upward movement of the plunger 202, forming the free fall of the throwing device 2 and the basket, and a throwing test is performed, and the plunger 202 extends to the initial position state; S4, then the movable end of the lifting assembly 3 is lowered, and under the pushing of the inclined surface 302, the plunger 202 retracts, the movable end moves below the plunger 202, and the plunger 202 extends to the initial position state; S5, repeat steps S2 to S4 again, that is, repeated throwing tests can be formed.

[0036] The specific embodiments of the application described above do not constitute a limitation on the scope of protection of the application. Any various other corresponding changes and modifications made according to the technical concept of the application shall be included in the scope of protection of the claims of the application.

Claims

1. A repeated throwing test device, characterized in that: include: frame; A throwing member is slidably connected to the frame and moves along the throwing direction. The throwing member is provided with a connecting end for connecting to the hanging basket and a retractable plunger; A lifting assembly that drives its movable end to move upward or downward, and is used to move the push plunger upward to lift it, or to move the push plunger downward to retract it; as well as A disengagement mechanism is mounted on the frame and has a pushing end arranged on the lifting track of the plunger, which is used to push the plunger to contract and disengage from the movable end of the lifting assembly when the movable end of the lifting assembly moves upward, thereby forming a free fall of the ejection member.

2. The repeated throwing test device according to claim 1, characterized in that: The movable end of the lifting assembly has an end face and an inclined surface arranged in sequence along the throwing direction, the top of the plunger is provided with a first inclined plane matching the inclined surface, the pushing end is provided with a second inclined plane matching the first inclined plane, and the pushing end and the movable end of the lifting assembly are arranged alternately.

3. The repeated throwing test device according to claim 1, characterized in that: It also includes a buffer assembly, which is installed on the frame and arranged in the throwing direction of the throwing member, and is used to elastically buffer the throwing member and prevent it from falling off the frame downward.

4. The repeated throwing test device according to claim 3, characterized in that: The buffer assembly includes a support frame, a buffer pad, a lifting frame and a linkage structure. The support frame is installed on the frame and is arranged at the bottom end of the throwing direction of the throwing member. The buffer pad is detachably installed on the top of the lifting frame. The lifting frame is slidably connected to the support frame. The two ends of the linkage structure are respectively connected to the lifting frame and the lifting assembly, and are used to transmit the lifting and lowering of the lifting assembly to drive the lifting frame to lower and lift, so that the lifting frame lifts the throwing member and the movable end of the lifting assembly moves downward at the same time.

5. The repeated throwing test device according to claim 4, characterized in that: The linkage structure includes a first rack, a gear and a second rack, the gear is rotatably connected to the frame, the first rack is fixedly connected to the lifting frame, and the second rack is connected to the movable end of the lifting assembly. The first rack and the second rack are both engaged with the gear and are symmetrically arranged on both sides of the gear. Guide cylinders corresponding to the first rack and the second rack are provided on the frame, and the first rack and the second rack are respectively slidably connected to the corresponding guide cylinders.

6. The repeated dropping test device according to claim 1, characterized in that: The ejection member includes a slider and a passive connecting rod, wherein the passive connecting rod is connected to the bottom of the slider, and the slider is slidably connected to the frame.

7. The repeated dropping test device according to claim 6, characterized in that: A through hole is provided on the slider, and the plunger is slidably connected to the through hole. A cover plate is detachably connected to one side of the slider, and a mounting hole corresponding to the through hole is provided on the cover plate. A bolt is inserted between the mounting hole and the through hole, and a spring is sleeved on the outside of the bolt. The two ends of the spring are respectively in contact with the cover plate and the plunger.

8. The repeated dropping test device according to claim 1, characterized in that: At least two inductive proximity switches are installed on the rack.

9. The repeated dropping test device according to claim 1, characterized in that: The lifting assembly includes a hydraulic cylinder push rod, and the hydraulic cylinder push rod is installed on the frame.

10. A throwing test method, characterized in that: The following steps are involved: S1. Connect the launching piece to the hanging basket through a flexible connector, with the plunger initially in the extended position; S2, the lifting assembly drives its movable end to rise, pushing the plunger, and driving the ejection piece to rise; S3. Continue to lift to the disengagement mechanism position, the plunger moves to the push end of the disengagement mechanism, and the push end shrinks and disengages during the upward movement of the plunger, forming a free fall of the throwing piece and the hanging basket, and a throwing test is performed, and the plunger extends to the initial position; S4, the movable end of the lifting assembly then descends, and under the push of its movable end, the plunger retracts, the movable end moves below the plunger, and the plunger extends to its initial position; S5. Repeat steps S2 to S4 to form a repeated throwing test.

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