72 results about "Drop test" patented technology

The invention belongs to the field of aviation structure strength tests, and particularly relates to a testing machine pitching and rolling angle adjusting method and system for a full-aircraft drop test, and the method comprises the steps: adjusting the lengths of a front lifting rope l1 and a rear lifting rope l2 through a first servo motor; the lengths of the adjusted front lifting rope l1 and the adjusted rear lifting rope l2 are calculated through the cosine law according to the geometrical relationship; the lengths of the left lifting rope 13 and the right lifting rope 14 are adjusted through a second servo motor; and the lengths of the adjusted left lifting rope 13 and the right lifting rope 14 can be calculated through the cosine law according to the geometrical relationship. The pitching and rolling postures can be automatically adjusted, and the problems that an existing method is low in efficiency and poor in precision are solved. According to test experience, according to an existing posture adjusting method, replacement needs about half a day to one day every time, the number of times of putting every day does not exceed ten at most, and manual operation is needed on wings or a fuselage every time. And after automatic adjustment is achieved, the target can be achieved in several minutes through adjustment of the motor, efficiency is high, and safety is higher.

The invention relates to a release device (1) for releasing an object suspended therefrom under load, in particular for drop tests, wherein the release device (1) comprises: two complementarily shaped clamping jaws (3a, 3b), wherein the clamping jaws (3a, 3b) are each rotatably mounted about a bearing (2), wherein the clamping jaws (3a, 3b) are designed to hold a release bolt (4) with the hanging object attached thereto in the closed state; and a toggle lever with two legs (5, 6), wherein the legs are connected at their common connection to a bearing bolt (7) and are connected at their respective outer connections (22a, 22b) to the clamping jaws (3a, 3b), wherein the toggle lever is designed to hold the clamping jaws (3a, 3b) closed without actuating force in an overextended configuration against a mechanical stop (10);wherein the toggle lever is configured to release the locking of the clamping jaws (3a, 3b) by a primary stroke (24) of the bearing pin (7) resulting from the overextension of the toggle lever beyond the dead center, corresponding to a secondary stroke (25), so that the clamping jaws (3a, 3b) transition to an open state and the hanging object is dropped. The invention further relates to a method for releasing a hanging object under load.

The invention discloses a drop test device for a case of a vehicle battery pack. The device includes a bracket body, and a mounting frame is suspended horizontally on an upper end surface of the bracket body. The two mounting frames are fixed parallel to the bracket body, and a fixing frame is horizontally fixed below each of the mounting frames on the bracket body. A sliding seat is slidably arranged between the two mounting frames, and one side of the fixing frame is provided with a side connecting plate. A sliding rail is arranged between the sliding seat and the side connecting plate, and a simulated platform mechanism is slidably arranged on the sliding rail for body installation of the vehicle battery pack so as to design installation states of the vehicle battery pack according to different models.

This invention discloses a method for identifying vehicle modal parameters based on impact loads, comprising the following steps: S100: designing drop conditions according to the vehicle system's modal characteristics; S200: conducting drop tests on the test vehicle under the designed drop conditions; S300: collecting the vehicle's vibration response during the drop test and calculating the modal energy using the vibration response; S400: identifying modal parameters using the state variable method. This invention utilizes impact loads to excite the modal vibration response of the vehicle system and combines the modal energy method and the state variable method to accurately identify the modal parameters. This invention is simpler, lower cost, and more accurate, effectively identifying the modal parameters of a rail vehicle system without the need for complex simulations and high testing costs.

The invention provides a multifunctional simulation drop test device and a detection method thereof, and the device comprises a pedestal, the pedestal is provided with a rack for installing a screw rod piece, a bearing seat installed on the screw rod piece is rotatably connected with a shaft sleeve piece arranged on a storage seat through a fulcrum shaft, the two sides of the storage seat are provided with open grooves with guide rail pieces, the guide rail pieces are movably provided with sliding seats, and the sliding seats are provided with through holes. One end of a shaft rod arranged on the sliding base is connected with a supporting plate through a sleeve and connected with a second driver, when an object is placed on the supporting plate, the second driver controls rotation of a fulcrum shaft to achieve bearing and falling of the object, and through cooperation of the fulcrum shaft and a shaft sleeve piece, the object can be driven by the object placing base to conduct angle adjustment. The pedestal is provided with a clamping groove, the clamping groove is movably provided with a contact base, the contact base is movably provided with a contact plate in contact with an object, and the contact plates made of different materials are in contact with the object, so that different contact environments are simulated, and the detection comprehensiveness is improved.

The present disclosure relates to the technical field of test equipment, and provides a falling test device, which comprises a lifting assembly, a sliding assembly, a containing assembly and a cushion plate assembly; the lifting assembly has a lifting piece and a driving motor in transmission connection with the lifting piece; the sliding assembly is in separable connection with the lifting piece and can move upward synchronously with the lifting piece or freely fall alone after being separated from the lifting piece; the containing assembly is connected with the sliding assembly and has a containing space for containing an object to be tested; the cushion plate assembly is correspondingly arranged below the containing assembly and is used for receiving the containing assembly and detecting the impact load when the containing assembly falls; the driving motor can electrically drive the lifting piece to move upward to a fixed height. The falling test device has the beneficial effects of being able to accurately control the falling height and having high test efficiency.

The utility model discloses a drop test tool. The drop test tool comprises a rack, a material box, a drop mechanism, a pickup mechanism and a visual inspection mechanism, the material box is mounted on the rack; the falling mechanism is installed on the machine frame and provided with a clamping jaw, and the clamping jaw is located above the material box. The picking mechanism is installed on the rack, the picking mechanism is provided with a picking clamping jaw, and the picking clamping jaw can move between the material box and the clamping jaw; the visual inspection mechanism is installed on the machine frame and electrically connected to the picking mechanism. According to the drop test tool, the drop test of equipment can be automatically carried out, manual intervention is reduced, the large-scale and high-frequency test requirements are met, and the test efficiency is improved.

The invention relates to the technical field of test equipment, and particularly discloses a turnover device and drop test equipment, the turnover device comprises a positioning mechanism, a turnover mechanism and a lifting driving member, the positioning mechanism comprises a first positioning assembly, a second positioning assembly and a supporting seat, the first positioning assembly is used for clamping or loosening two ends of a to-be-tested product in a first direction, and the second positioning assembly is used for clamping or loosening two ends of the to-be-tested product in a second direction; the second positioning assembly is used for clamping or loosening the two ends of the to-be-detected product in the second direction; the turnover mechanism comprises a turnover driving part and a turnover grabbing assembly in transmission connection with the turnover driving part, the turnover driving part can drive the turnover grabbing assembly to rotate, and the turnover grabbing assembly is used for grabbing or loosening the tested product; the lifting driving part is used for driving one of the positioning mechanism and the turnover mechanism to be close to or far away from the other one in the vertical direction, the to-be-tested product is positioned through the positioning assembly before and after the to-be-tested product is turned over, and it can be guaranteed that the position of the to-be-tested product grabbed by the turnover grabbing assembly is accurate; and the position precision of the overturned product to be detected is ensured to be reliable.

The utility model relates to a skid -type undercarriage drop test device, including gantry, electric hoist, electromagnet, metal section tool rest, counterweight, the metal section tool rest is used for installing counterweight, and still include the undercarriage installation tool of skid -type undercarriage, electric hoist fixed mounting is below the gantry, is used for driving the lift of electromagnet, the electromagnet can adsorb the metal section tool rest when electrification.

The application discloses a packaging structure and air conditioning equipment, the packaging structure comprises a first cover body and a second cover body, the first cover body and the second cover body are connected and form a containing cavity; one end of the first cover body inside has a first limiting assembly, one end of the second cover body inside has a second limiting assembly matched with the first limiting assembly; the other end of the first cover body inside has a bevel support assembly, the bevel support assembly makes the same end of the first cover body and the second cover body form a difference; after placing the product to be packaged in the containing cavity, the first cover body and the second cover body can be locked through the cooperation of the first limiting assembly and the second limiting assembly, and the first limiting assembly and the second limiting assembly are arranged on the same side of the packaging structure, so that the limiting protection is convenient when the side drop test; and because of the existence of the difference, the back of the fuselage with strong strength is stressed when the side super-high test, and the technical problem that the prototype top is often cracked during the super-high drop test is solved.

The invention relates to the technical field of hydrogen storage cylinder test detection, in particular to a temperature-controllable gas cylinder accelerated drop test device and method, and the device comprises a lifting platform and a gas cylinder telescopic rotary clamping tool. The gas cylinder telescopic rotary clamping tool and the lifting table are respectively used for clamping a test gas cylinder and supporting the gas cylinder to do vertical accelerated motion, the gas cylinder telescopic rotary clamping tool is fixedly arranged below the lifting table, and the lifting table is provided with a temperature control cavity annular wall inlet and outlet. And the temperature control cavity annular wall inlet and outlet is used for providing an extension and retraction channel for the multi-section annular wall of the temperature control cavity. According to the test device and method, high-energy and high-acceleration drop simulation is realized, an accurate temperature environment simulation function is integrated, all-around and automatic test and safety guarantee are provided, the test flexibility and automation degree are improved, self-verification and feedback optimization capabilities are provided, the test accuracy can be verified, and the test efficiency is improved. And closed-loop optimization of the test process is supported.

The utility model belongs to the technical field of drop test, and particularly discloses a drop detection safety protection device which comprises a bottom table, a frame plate is installed on the outer side of the bottom table through bolts, an opening is formed in the front end of the frame plate, a protection door is arranged in the opening in a sliding mode, and a working platform is movably installed on the surface of the bottom table. A side plate is installed at the end of the rear portion of the working platform, a door opening mechanism and a path groove are arranged on the inner wall of the frame plate, a protruding column and a pushing column are arranged on the surface, close to the frame plate, of the side plate and matched with the path groove and the door opening mechanism correspondingly, and a driving mechanism is arranged in the bottom table. According to the utility model, when substandard objects are broken after a falling test, the driving mechanism drives the working platform to move forwards, and the working platform is in an inclined state after extending out, so that the cleaning and the maintenance are facilitated.

The invention discloses a titanium-based composite undercarriage drop simulation analysis method, and relates to the technical field of aviation, and the method comprises the steps: building a buffer mechanical model of a titanium-based composite undercarriage, the buffer mechanical model covering an air spring force, an oil damping force and a structure limiting force; establishing a rigid-flexible hybrid virtual prototype model based on a multi-body dynamics method, wherein the rigid-flexible hybrid virtual prototype model realizes component integration through geometric modeling, flexible body creation and rigid-flexible coupling processing; carrying out drop test simulation, and obtaining a dynamic response curve of the undercarriage under the impact load through parameter setting and dynamics calculation; through combination of rigid-flexible coupling modeling and drop test simulation, simulation of the drop behavior of the titanium-based composite undercarriage is realized. According to the method, the test cost can be reduced, the research efficiency is improved, and the method has important engineering significance for lightweight and high-performance design of the undercarriage.

The application discloses a kind of introduction cable preform end assembly drop test device, including base;The bottom end of the both sides of the base is hinged with load-bearing plate by hinge;By operator sliding clamping plate A and horizontal crossbar backwards, it is fixed on the object plate, while the metal impact plate in the base is removed, and is clamped in the base;Subsequently, artificially take out the introduction cable preform, and lead out a section through between clamping plate A and clamping plate B, and make the section that it leads out adhere to the bottom of horizontal crossbar, then release hand, the end of introduction cable preform leads out will swing around the part that it is fixed in clamping plate A and clamping plate B under the action of gravity, and impact on metal impact plate under the action of inertial force;Relative to prior art, steel ruler is arranged in the device on the both sides of support frame, can ensure that the introduction cable drop height is consistent and adjustable, the result error of repeated test is relatively small, and the accuracy is guaranteed.

The utility model provides a device for a drop test of a battery of more than 50kg, which comprises a frame, a lifting rope rotating shaft is rotatably arranged in the middle of the upper end of the frame, a winch is arranged in the middle of one side of the frame, a lifting rope is bundled on the winch, one end of the lifting rope bypasses the lifting rope rotating shaft and is fixedly connected with a lifting hook, the lifting hook comprises a hook body, and the hook body is fixedly connected with the lifting rope. The upper end of the hook body is fixedly connected with a lifting rope, an opening is formed in the middle of the lower portion of the hook body, a wrench and a hook are contained in the opening, one end of the wrench is rotationally connected with the hook body, and the upper end face of the hook is an inclined face and forms an acute-angle tip. The wrench is in a horizontal state, a hanging rod is arranged on one side of the middle of the hook, and one side of the middle of the hook is rotationally connected with the hook body. According to the invention, the falling height and the impact position of each time can be consistent, and the accuracy of the subsequent test result and the safety of the detection operation process are ensured.

A drop test device for a micromechanical component. The drop test device includes a drop body having a shell and having an interior space for receiving at least one micromechanical component.

The application provides a hydraulic lifting adjusting locking device for aircraft landing gear drop test, comprising: a support assembly comprising a base and a support, the support being arranged on the base, the support comprising four first vertical supports, two second vertical supports and a horizontal support; a sliding carriage assembly comprising a sliding carriage body and a guide wheel set, the sliding carriage body being used for carrying a test weight, the sliding carriage assembly sliding along the vertical supports under the guidance of the guide wheel set; a lifting assembly comprising two lifting oil cylinders and two linear modules, each linear module comprising a sliding member and a sliding rail arranged along the second vertical support, the sliding member being arranged around the lifting oil cylinder by a hoop, so that the lifting oil cylinder slides along the sliding rail in the vertical direction; a locking assembly arranged on the second vertical support, the locking assembly locking the sliding carriage assembly when the sliding carriage assembly reaches a preset position; and a safety assembly arranged on the vertical support, the safety assembly positioning the sliding carriage assembly when the sliding carriage assembly is locked.

The utility model relates to the technical field of unmanned helicopter tail beam supporting, in particular to an unmanned helicopter tail beam supporting device which comprises a first supporting pipe, a second supporting pipe and a third supporting pipe and is characterized in that the first supporting pipe, the second supporting pipe and the third supporting pipe are sequentially connected in a sleeved mode, and the bottom of the first supporting pipe is rotationally connected with a connecting base. An adjusting plate is installed on the third supporting pipe, the third supporting pipe is rotationally connected with a connecting rod through the adjusting plate, a first unmanned aerial vehicle tail beam supporting ring is installed at the top end of the connecting rod, and a second unmanned aerial vehicle tail beam supporting ring is installed at the top of the first unmanned aerial vehicle tail beam supporting ring; original elastic connection design (the first spring) is adopted, the supporting pipe forms a compressible flexible joint, actual measurement shows that the structure can absorb about 50% of landing impact force, and empennage composite material damage caused by rigid contact is effectively avoided. The parameters of the spring are optimized through a drop test, and a 120 mm buffer line is provided while the supporting rigidity is guaranteed.

The application belongs to the field of aircraft drop test, and is a method for obtaining the overload of a component based on the acceleration of a full aircraft drop test. The vertical acceleration time history and the touchdown sink speed in the full aircraft drop test are obtained first. The vertical acceleration time history is filtered to obtain the acceleration. The acceleration is integrated to obtain the vertical speed time history. The absolute maximum of the vertical speed time history is taken as the measured drop speed. Whether the relative error between the measured drop speed and the touchdown sink speed is greater than 2% is judged to determine whether it is the required filtering frequency. If yes, the vertical acceleration time history of the concerned component is extracted, and low-pass filtering is performed to obtain the overload of the concerned component. The method provides input for the design of a carrier-based aircraft structure and airborne equipment, is simple and stable, and can effectively remove the influence of high-order elastic modes and high-frequency interference signals.

This invention discloses a mechanical deployment device for wind tunnel free-drop tests, comprising: a base component, a drive component, and a trigger component; the base component, drive component, and trigger component are disposed inside the test model; the drive component is installed inside the base component and connected to the external attachment; one end of the trigger component is connected to the drive component, and the other end is installed on the test model. The mechanical deployment device for wind tunnel free-drop tests described in this invention has a stable and compact structure, high reliability, and is easy to use. It can achieve precise and stable deployment of external attachments, can be reused for different tests, and simultaneously improves efficiency and reduces costs.

A method, apparatus, and system provide the ability to perform a drop test using a response surface. Inputs including a target safety factor (T-SF), a drop height, and a computer model, are acquired. An initial template is evaluated by computing a safety factor for a set of orientations, for each model point MP in the computer model across a set of times (t). A minimum safety factor is determined and a response surface for the model is generated. An actual safety factor SFm is generated by conducting a drop test simulation of the model based on a point having the minimum safety factor and a corresponding orientation. Consistency / validity of the actual safety factor is compared to the target safety factor and the model either passes or additional points may be added to the set of points and the process repeats based on an updated response surface.

The invention relates to the technical field of drop test, and discloses a righting tool for a box body, a drop test device and a control method of the drop test device. The righting tool comprises a mechanical arm and a righting executing mechanism. The righting executing mechanism is movably arranged on the mechanical arm. The righting executing mechanism comprises a plurality of supporting claws and a plurality of righting discs. And the plurality of centralizing discs are movably arranged on the plurality of supporting claws in a one-to-one correspondence manner, and the plurality of centralizing discs are used for being attached to a plurality of surfaces of the box body respectively. The mechanical arm is used for driving the righting executing mechanism to move so as to drive the righting discs to move, and the mechanical arm is used for adjusting the position of the box body. According to the box straightening device, the mechanical arm drives the straightening executing mechanism to move so as to straighten the box, manual participation is not needed in the box straightening process, and safety is improved.

The invention discloses a calculation method for coupling of the number of main umbrellas and a resistance coefficient of a reloading air-drop system. According to a large number of test results, the resistance coefficient of the group parachutes is inversely calculated according to the air-drop falling speed, the air-drop weight, the landing field density and the number of the main parachutes in the air-drop test, and the relation between the resistance coefficient and the number of the main parachutes is obtained. The area of a single parachute is selected according to the air-drop weight and the air-drop landing field, when the air-drop weight is larger than 1 ton, the method is suitable for selecting a main parachute of 760 square meters, and when the air-drop weight is smaller than 1 ton, the method is not suitable. Setting an initial landing speed and an initial resistance coefficient, and calculating the number of main umbrellas according to a formula. If the air-drop weight, the landing speed and the landing field change, the number of the main parachutes can be calculated again according to the steps. The method can solve the problem of selection of the number of the main umbrellas during air-drop of the reloading air-drop system.

The invention relates to a drop test device for a micromechanical component comprising a drop body (100) with a shell (110) and with an interior (120) for receiving at least one micromechanical component (1).

The utility model provides a drop test rack, belongs to the technical field of initiating explosive device performance testing, and mainly aims to simulate an accidental drop scene of a detonator in the carrying, loading and unloading processes. According to the main technical scheme, the drop test rack comprises a drop support, the drop support is provided with a hanging structure used for hanging a drop cylinder, the drop cylinder is connected with the hanging structure through a traction rope, and the drop cylinder is used for bearing an initiating explosive device to be tested; the pulling rope is connected with the falling clamp, and the falling clamp has a locking state in which the falling cylinder can be locked at a first operation position and a releasing state in which the falling cylinder can be released at a second operation position; one end, far away from the falling clamp, of the traction rope is wound on the winding device, and the winding device is used for winding and unwinding the traction rope so as to drive the falling clamp to be switched between the first operation position and the second operation position.

This application provides an automatically reset gravity-release locking mechanism for drop testing, belonging to the field of aircraft drop testing technology. It includes a main outer plate of the lock body, a locking claw, a locking tongue, an electro-permanent magnet assembly, a locking block, a fixed guide rail, and a main shaft pin. The top of the main outer plate is connected to a hydraulic lifting actuator. The electro-permanent magnet assembly is located on the upper side of the fixed guide rail. The locking block is sleeved and fixed on a top rod, with its side engaging with the fixed guide rail. One end of the top rod passes through the electro-permanent magnet assembly, and the other end has a locking tongue on its lower side. The two lateral sides of the locking block are connected to the upper end of the locking claw via locking connecting rods. The middle of the locking claw is fixed to the main outer plate of the lock body via a main shaft pin, and the lower end of the locking claw clamps the locking tongue. In the locked state, the locking block connects to the electro-permanent magnet assembly under magnetic force. The connection point between the locking connecting rod and the locking block is lower than the connection point between the locking connecting rod and the locking claw. This solution has a short unlocking response time, low maintenance cost, and improves the efficiency and safety margin of repeated drop testing of the entire aircraft.

The invention relates to the technical field of steel ball drop test, and discloses steel ball accurate drop test equipment and a test method, the steel ball accurate drop test equipment comprises a base, the top of the base is provided with a protection part; and the protection component comprises a fixing plate, the bottom of the fixing plate is fixedly connected with the top of the base, a bearing table is fixedly connected to the surface of the fixing plate, a protective fence is fixedly connected to the top of the bearing table, and a protection frame is fixedly connected to the top of the fixing plate. The extrusion disc is in contact with the rolling rod frame during rotation, the rolling rod frame is pushed to rotate through the inclination of the extrusion disc and rotates towards the outer end of the circular plate at the same time, the rolling rod frame pushes the bent plates to move close to each other when rotating towards the outer end of the circular plate, and the steel balls are clamped when the bent plates move close to each other; and the lower surface of the bent plate is in contact with the lower surface of the steel ball and then holds the steel ball, so that the stability of clamping and fixing the steel ball by the bent plate is improved.

The invention provides a drop test device, which comprises a bracket, and further comprises a mounting frame which is arranged on the bracket in a lifting manner; the clamping assembly comprises a pair of clamping arms movably arranged on the mounting frame and a first driving structure for driving the clamping arms to perform horizontal clamping action; the inclination adjusting assembly controls the to-be-tested box body to rotate around a first axis and a second axis, the first axis and the second axis are horizontal, and horizontal projections of the first axis and the second axis intersect with each other. According to the invention, a large-size box body can be subjected to a drop test, the design requirement and difficulty of the clamp are reduced, the cost is reduced, the drop test is more accurate and comprehensive, the tolerance performance of the box body under various drop conditions can be evaluated, reliable data are provided for product design and quality control, and the product quality is improved. The step of taking the box body of the drop test equipment is reduced, the test efficiency is improved, and the failure rate of the equipment is reduced.

The invention relates to the technical field of drop testing, and discloses a carton drop tester and a carton quality testing method.The carton drop tester comprises a vertical frame, a reciprocating driving mechanism is arranged on the vertical frame, a locking piece is arranged on the reciprocating driving mechanism in a sliding mode, a support is further arranged on the vertical frame in a sliding fit mode, and an unlocking piece and a clamping piece are arranged on the support; the vertical frame is further provided with an overturning piece and a detection mechanism, the detection mechanism comprises a rotating disc and a switching piece, and a plurality of test plates made of different materials are arranged on the circumference of the surface of the rotating disc. According to the carton falling test device, a carton can be limited when falling while a falling test is conducted on the carton, so that accurate test of edges and corners of the carton is achieved, detection of the carton when cargoes are contained in the carton can be simulated, meanwhile, the problem that the carton needs to be clamped again after one edge and corner is formed at the moment is solved, and the carton falling test efficiency is improved. And the carton and the test plate can be automatically turned over, and continuous testing can be carried out.