A trolley case impact testing device

Abstract

The present application belongs to the luggage testing equipment, and particularly relates to a trolley case impact test device, which comprises a rack, a double-rod cylinder vertically arranged on the rack, a piston cavity of the double-rod cylinder being separated into a first chamber and a second chamber by a piston, a hook arranged at a lower end of a piston rod of the double-rod cylinder and used for hanging a trolley or a handle of the trolley case, a gas source used for providing driving gas to the double-rod cylinder, an electromagnetic control valve arranged between the first chamber, the second chamber and the gas source, and a controller used for controlling the electromagnetic control valve. The present application can realize three test stages of lifting, releasing and buffering in sequence by using only a single power source, so that the mechanical structure is significantly simplified, the manufacturing cost and maintenance difficulty are reduced, the noise is effectively reduced and the working environment is improved, and meanwhile, the buffering stroke and strength can be flexibly controlled, so that the device can adapt to different specifications of test pieces and test standards, and the reliability, adaptability and control precision of the impact test are greatly improved.

Description

Technical Field

[0001] This invention pertains to bag and luggage testing equipment, specifically relating to an impact testing device for trolley cases. Background Technology

[0002] Existing vibration impact testing machines, when used to test the strength of critical stress-bearing components of suitcases (such as pull rods and handles), generally suffer from problems such as complex structure, high cost, and insufficient reliability. They typically require independent lifting mechanisms (such as pneumatic or electric cylinders) and release mechanisms (such as electromagnetic or mechanical release devices), which not only increases the difficulty of equipment manufacturing and maintenance but also affects its long-term stability. Furthermore, these machines often rely on mechanical buffer structures, resulting in high noise levels and poor working environments. The buffer stroke and force adjustment are also limited, usually only achievable by adjusting the specimen load, lacking sufficient flexibility and adaptability in practical applications. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide an oscillation shock testing machine that can simplify the structure, improve reliability and enhance buffering performance.

[0004] To achieve the above and other related objectives, the present invention provides a suitcase impact testing device, comprising:

[0005] frame;

[0006] A double-rod cylinder is vertically mounted on the frame. The piston chamber of the double-rod cylinder is divided by a piston into a first chamber located below the piston and a second chamber located above the piston. The lower end of the piston rod of the double-rod cylinder is provided with a hook for suspending a pull rod or handle of a suitcase.

[0007] A gas source is used to provide driving gas to the dual-rod cylinder;

[0008] An electromagnetic control valve is disposed between the first chamber, the second chamber, and the air source, and the electromagnetic control valve is configured to switch between the following positions:

[0009] In station one, the electromagnetic control valve connects the air source to the first chamber and connects the second chamber to the atmosphere.

[0010] Station 2, the electromagnetic control valve connects the first chamber and the second chamber; and

[0011] At station three, the electromagnetic control valve connects the first chamber to the second chamber via a damping valve;

[0012] It also includes a controller for controlling the electromagnetic control valve to switch between station one, station two and station three.

[0013] In an optional embodiment of the present invention, a position detection unit for detecting the position of the piston rod of the dual-rod cylinder is further included, the position detection unit being electrically connected to the controller; the piston rod of the dual-rod cylinder reciprocates between a first position and a second position in a vertical direction, wherein the first position is located below the second position, and a third position is located between the first position and the second position; the controller is configured to: when the piston rod moves upward from the first position to the second position, the controller controls the electromagnetic control valve at station one to switch to station two; when the piston rod moves downward from the second position to the third position, the controller controls the electromagnetic control valve at station two to switch to station three; when the piston rod moves downward from the third position to the first position, the controller controls the electromagnetic control valve at station three to switch to station one.

[0014] In an optional embodiment of the present invention, an input module is further included, the input module being electrically connected to the controller, the controller being configured to respond to user operations on the input module by adjusting the relative distance between the first position and the second position, and / or the relative distance between the second position and the third position, and / or the relative distance between the third position and the first position.

[0015] In an optional embodiment of the present invention, the electromagnetic control valve includes a three-position five-way solenoid valve, which includes a first interface, a second interface, a third interface, a fourth interface, and a fifth interface; the first interface is connected to the air source, the second interface is connected to the atmosphere, the third interface is connected to the first chamber, the fourth interface is connected to the second chamber, and the fifth interface is connected to the first chamber via the damping valve; inside the three-position five-way solenoid valve, in response to station one, the first interface is connected to the third interface, the second interface is connected to the fourth interface, in response to station two, the third interface is connected to the fourth interface, and in response to station three, the fourth interface is connected to the fifth interface.

[0016] In an optional embodiment of the present invention, the damping valve is an adjustable electromagnetic damping valve, the electromagnetic damping valve is electrically connected to the controller, and the controller is configured to adjust the damping magnitude of the electromagnetic damping valve in response to user operations on the input module.

[0017] In an optional embodiment of the present invention, the position detection unit includes a potentiometer, the length direction of which is parallel to the axial direction of the double-rod cylinder, the housing of which is fixedly connected to the cylinder body of the double-rod cylinder, and the probe of which is fixedly connected to the piston rod of the double-rod cylinder.

[0018] In an optional embodiment of the present invention, the frame includes a base, two support arms disposed on the base, and a crossbeam disposed between the upper ends of the two support arms, and the double-rod cylinder is mounted on the crossbeam.

[0019] In an optional embodiment of the present invention, casters are provided below the base.

[0020] In an optional embodiment of the present invention, a locking device for locking the casters to prevent them from rotating is provided below the base, or height-adjustable support legs are provided below the base.

[0021] In an optional embodiment of the present invention, the base is provided with an elastic cushioning pad, which is at least located below the suitcase suspended by the hook.

[0022] The technical advantages of this invention are as follows: By coordinating the control of a dual-rod cylinder and an electromagnetic control valve, this invention can sequentially achieve three testing stages—lifting, releasing, and buffering—using only a single power source. At station one, the air source connects to the first chamber, causing the piston to smoothly lift the pull-rod box. Switching to station two, the first and second chambers connect to form a loop, allowing the piston to rapidly fall under gravity for instantaneous release. Upon entering station three, the two chambers are connected via a damping valve, utilizing the semi-enclosed air cushion effect formed by the compressed gas within the cylinder for gentle buffering. This design fundamentally eliminates the traditional independent lifting and releasing mechanism, significantly simplifying the mechanical structure, reducing manufacturing costs and maintenance difficulty. Furthermore, by replacing mechanical collisions with pneumatic buffering, it effectively reduces noise and improves the working environment. Simultaneously, by adjusting the switching timing and the damping valve opening, the buffering stroke and force can be flexibly controlled, enabling the equipment to adapt to different specimen specifications and testing standards, greatly improving the reliability, adaptability, and control accuracy of impact testing. Attached Figure Description

[0023] Figure 1 This is a perspective view of the impact testing apparatus for a trolley case provided in an embodiment of the present invention;

[0024] Figure 2 This is a front view of the impact testing apparatus for a trolley case provided in an embodiment of the present invention;

[0025] Figure 3 This is a side view of the impact testing apparatus for a trolley case provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the electromagnetic control valve provided in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the working principle of the electromagnetic control valve at station one provided in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the working principle of the electromagnetic control valve at station two provided in an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the working principle of the electromagnetic control valve at station three provided in an embodiment of the present invention;

[0030] Explanation of reference numerals in the attached drawings: 100, luggage case; 10, frame; 11, base; 12, support arm; 13, crossbeam; 14, caster; 15, support leg; 20, double-rod cylinder; 21, piston; 22, first chamber; 23, second chamber; 24, piston rod; 25, hook; 30, air source; 40, electromagnetic control valve; 1, first interface; 2, second interface; 3, third interface; 4, fourth interface; 5, fifth interface; 50, damping valve; 60, controller; 70, position detection unit; 71, probe. Detailed Implementation

[0031] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0032] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0033] Vibration impact testing machines commonly suffer from complex structures, high costs, and poor operational reliability when testing the strength of critical stress-bearing components of suitcases. The root cause lies in the fact that, to achieve the lifting and instantaneous release testing actions, these machines typically employ independent lifting and releasing mechanisms: the lifting mechanism (such as a pneumatic or electric cylinder) provides a constant lifting force, while the releasing mechanism (such as an electromagnet or mechanical gripper) needs to achieve precise and rapid disengagement at a specific moment. This functionally separated design not only introduces more mechanical parts and complex control units, significantly increasing manufacturing costs and maintenance difficulties, but also directly affects the long-term operational stability and test repeatability of the overall system due to accumulated tolerances and coordination issues in the inter-mechanism linkages. Furthermore, in terms of cushioning, many machines rely on simple mechanical impact-type cushioning structures (such as metal springs or rubber pads), whose cushioning characteristics are fixed after design and installation, resulting in non-adjustable cushioning stroke and force. This makes it impossible to effectively and gently absorb the enormous impact kinetic energy generated during the test. This not only produces significant impact noise and deteriorates the test environment, but also limits the buffering effect to a coarse degree through indirect and limited means such as changing the weight of the specimen. This fails to meet the precise control requirements of different specifications and test standards for the impact process, resulting in significant limitations in practical applications. Therefore, this invention provides a suitcase impact testing device. This device can achieve the lifting, releasing, and buffering process of the suitcase using only different working states of a double-cylinder, greatly simplifying the physical structure of the testing equipment and improving the reliability of impact testing. Furthermore, this invention utilizes the semi-enclosed gas environment inside the double-cylinder to buffer the specimen. This effectively reduces noise and allows control of the buffering stroke and force of the specimen by adjusting the timing of the double-cylinder switching to the semi-enclosed state and the degree of semi-enclosure, thus improving the adaptability of impact testing.

[0034] The technical solution of the present invention will be described in detail below with reference to specific embodiments:

[0035] Please see Figure 1-7As shown, an embodiment of the present invention provides a suitcase impact testing device, which includes a frame 10, a double-rod cylinder 20, an air source 30, an electromagnetic control valve 40, and a controller 60. The double-rod cylinder 20 is vertically mounted on the frame 10. The piston chamber of the double-rod cylinder 20 is divided by a piston 21 into a first chamber 22 located below the piston 21 and a second chamber 23 located above the piston 21. The lower end of the piston rod 24 of the double-rod cylinder 20 is provided with a hook 25 for suspending the handle or pull rod of the suitcase 100. The air source 30 is used to provide driving gas to the double-rod cylinder 20. The electromagnetic control valve 40 is located on the first... Between chamber 22, the second chamber 23, and the air source 30, the electromagnetic control valve 40 is configured to switch between the following positions: position one, where the electromagnetic control valve 40 connects the air source 30 to the first chamber 22 and the second chamber 23 to the atmosphere; position two, where the electromagnetic control valve 40 connects the first chamber 22 to the second chamber 23; and position three, where the electromagnetic control valve 40 connects the first chamber 22 to the second chamber 23 via a damping valve 50; the controller 60 controls the electromagnetic control valve 40 to switch between position one, position two, and position three.

[0036] This invention, through the coordinated control of a dual-rod cylinder 20 and an electromagnetic control valve 40, can sequentially achieve the three testing stages of lifting, releasing, and buffering using only a single power source: at station one, as... Figure 5 As shown, the air source 30 is connected to the first chamber 22, causing the piston 21 to drive the pull-rod box 100 to rise smoothly; switching to station two, as... Figure 6 As shown, the first chamber 22 and the second chamber 23 are connected to form a circuit, allowing the piston 21 to fall rapidly under gravity and achieve instantaneous release; after entering station three, as... Figure 7 As shown, the two chambers are connected by a damping valve 50, utilizing the semi-enclosed air cushion effect formed by the compressed gas inside the cylinder to achieve gentle buffering. This design fundamentally eliminates the traditional independent lifting and releasing mechanism, significantly simplifying the mechanical structure, reducing manufacturing costs and maintenance difficulty. Furthermore, by replacing mechanical impact with pneumatic buffering, it effectively reduces noise and improves the working environment. Simultaneously, the buffering stroke and force can be flexibly controlled by adjusting the switching timing and the opening of the damping valve 50, enabling the equipment to adapt to different specimen specifications and testing standards, greatly improving the reliability, adaptability, and control accuracy of impact testing.

[0037] Please see Figure 1 , 2As shown in Figures 5, 6, and 7, in an optional embodiment of the present invention, a position detection unit 70 is further included for detecting the position of the piston rod 24 of the dual-rod cylinder 20. The position detection unit 70 is electrically connected to the controller 60. The piston rod 24 of the dual-rod cylinder 20 reciprocates vertically between a first position and a second position, wherein the first position is located below the second position, and a third position is located between the first position and the second position. The controller 60 is configured to: when the piston rod 24 moves upward from the first position to the second position, as... Figure 6 As shown, the controller 60 controls the electromagnetic control valve 40, which is in position one, to switch to position two; when the piston rod 24 moves downward from the second position to the third position, as... Figure 7 As shown, the controller 60 controls the electromagnetic control valve 40 at station two to switch to station three; when the piston rod 24 moves downward from the third position to the first position, as... Figure 5 As shown, the controller 60 controls the electromagnetic control valve 40 at station three to switch to station one. This invention, by setting a position detection unit 70 and linking it with the controller 60, achieves automatic cyclic control of the impact test process. When the piston rod 24 rises from the bottom first position to the top second position, the controller 60 automatically switches the electromagnetic control valve 40 from lifting station one to releasing station two, allowing the pull-rod box 100 to fall freely instantly. When the piston rod 24 falls through the middle third position, the controller 60 quickly switches to buffer station three, using the semi-enclosed gas in the cylinder to achieve gentle braking. After the piston rod 24 falls back to the bottom first position, the controller 60 switches back to lifting station one, automatically starting the next test cycle. This design, through the precise triggering of the piston rod 24 position signal at each stage, not only completely eliminates the operational errors and efficiency bottlenecks caused by manual intervention in traditional equipment, achieving a high degree of automation and consistency in the testing process, but also ensures the repeatability of the release timing and buffer starting point through precise control of key positions, thereby improving testing efficiency while further enhancing the reliability and repeatability of test data.

[0038] In an optional embodiment of the present invention, an input module (not shown) is further included. This input module is electrically connected to the controller 60, which is configured to respond to user operations on the input module by adjusting the relative distance between the first and second positions, and / or the relative distance between the second and third positions, and / or the relative distance between the third and first positions. By adding an input module and linking it with the controller 60, the present invention allows users to flexibly adjust the relative distances between the first, second, and third positions of the piston rod 24 according to actual testing needs. This design transforms key motion parameters into programmable control variables, freeing the lifting height, release timing, and buffer start point from the fixed limitations of the mechanical structure, thereby achieving precise customization of impact energy, buffering process, and test stroke. This not only significantly enhances the adaptability of the equipment to different specifications of bags and different testing standards but also provides users with highly flexible test strategy configuration capabilities without hardware adjustments, fundamentally expanding the application scope and testing accuracy of the equipment.

[0039] Please see Figure 4-7 As shown, in an optional embodiment of the present invention, the electromagnetic control valve 40 includes a three-position five-way solenoid valve, which includes a first interface 1, a second interface 2, a third interface 3, a fourth interface 4, and a fifth interface 5; the first interface 1 is connected to the air source 30, the second interface 2 is connected to the atmosphere, the third interface 3 is connected to the first chamber 22, the fourth interface 4 is connected to the second chamber 23, and the fifth interface 5 is connected to the first chamber 22 via the damping valve 50; inside the three-position five-way solenoid valve, in response to the first station, the first interface 1 is connected to the third interface 3, and the second interface 2 is connected to the fourth interface 4; in response to the second station, the third interface 3 is connected to the fourth interface 4; and in response to the third station, the fourth interface 4 is connected to the fifth interface 5. This invention employs a three-position five-way solenoid valve and integrates its interface functions, achieving precise switching and control of three working modes—lifting, releasing, and buffering—with only a single valve body. At station one, the air source 30 connects to the first chamber 22 to drive lifting, while the second chamber 23 is vented to the atmosphere for depressurization. When switching to station two, the two chambers are directly connected to form a loop, enabling rapid release. Upon entering station three, the second chamber 23 connects to the first chamber 22 via a damping valve 50, utilizing a throttling effect to form an air cushion for buffering. This highly integrated air circuit design not only eliminates the need for traditional multi-valve and complex pipeline connections, significantly simplifying the system structure and reducing costs and leakage risks, but also ensures the synchronicity and reliability of switching between different working conditions through a single valve core action, fundamentally improving the control accuracy and operational stability of the entire impact testing device.

[0040] Please see Figure 5-7 As shown, in an optional embodiment of the present invention, the damping valve 50 is an adjustable electromagnetic damping valve. The electromagnetic damping valve is electrically connected to the controller 60, which is configured to respond to user operations on the input module and adjust the damping magnitude of the electromagnetic damping valve. By employing an adjustable electromagnetic damping valve in the controller 60 and linking it with the input module, the present invention allows users to flexibly set the damping magnitude of the buffer gas path according to testing requirements. This design transforms the buffering force from a fixed mechanical parameter into a dynamically adjustable variable. By changing the degree of throttling of the gas flow between chambers, precise control of the impact force of the falling suitcase 100 is achieved. This not only enables a single device to simulate different impact scenarios from gentle to severe, meeting diverse testing standard requirements, but also provides users with a precise and convenient means of impact force control without replacing any hardware, greatly enhancing the testing adaptability and operating condition coverage of the equipment.

[0041] Please see Figure 1 , 2 As shown, in an optional embodiment of the present invention, the position detection unit 70 includes a potentiometer. The length direction of the potentiometer is parallel to the axial direction of the double-rod cylinder 20. The housing of the potentiometer is fixedly connected to the cylinder body of the double-rod cylinder 20, and the probe 71 of the potentiometer is fixedly connected to the piston rod 24 of the double-rod cylinder 20. The present invention establishes a direct linear mapping relationship between the stroke of the piston rod 24 and the resistance signal by fixing the housing of the potentiometer to the cylinder body and the probe 71 to the piston rod 24, and making its axial direction parallel to the double-rod cylinder 20. This linkage structure not only effectively utilizes the guiding stability of the double-rod cylinder 20 and avoids structural interference and measurement errors caused by additional detection mechanisms, but also provides high-precision and lag-free position feedback to the controller 60 through continuous and real-time detection of the piston 21 displacement by the potentiometer. This design, while ensuring high compatibility with the double-rod cylinder 20 and a compact and reliable structure, significantly improves the accuracy and response speed of position detection, providing a key guarantee for the precise switching of each stage of the impact test.

[0042] Please see Figure 1-3As shown, in an optional embodiment of the present invention, the frame 10 includes a base 11, two support arms 12 disposed on the base 11, and a crossbeam 13 disposed between the upper ends of the two support arms 12, and the double-rod cylinder 20 is mounted on the crossbeam 13. The present invention uses a gantry structure composed of the base 11, the two support arms 12, and the crossbeam 13 to mount the double-rod cylinder 20, providing a stable support foundation for impact testing. This symmetrically arranged rigid frame can effectively suppress the impact force and vibration generated during the test, preventing the test accuracy from being affected by the shaking or deformation of the frame 10. This structure not only ensures the centering and operational stability of the double-rod cylinder 20 under severe impact conditions, but also significantly improves the overall impact resistance and long-term structural reliability of the machine, laying the foundation for obtaining accurate and repeatable test results.

[0043] Please see Figure 1-3 As shown, in an optional embodiment of the present invention, casters 14 are provided below the base 11. By providing casters 14 below the base 11, the present invention combines a stable gantry structure with flexible mobility, allowing the entire impact testing device to be conveniently adjusted in working position according to testing requirements. This design effectively solves the problems of rigid layout and poor spatial adaptability of traditional fixed testing machines without sacrificing the overall structural stability and impact resistance of the equipment, significantly improving the deployment efficiency and usage flexibility of the equipment in different workshops or experimental environments.

[0044] Please see Figure 1-3 As shown, in an optional embodiment of the present invention, a locking device (not shown) for locking the casters 14 to prevent them from rotating is provided below the base 11, or a height-adjustable support leg 15 is provided below the base 11. By adding a caster 14 locking device or a height-adjustable support leg 15 below the base 11, the present invention balances the mobility and operational stability of the equipment. The caster 14 locking device effectively prevents accidental movement of the equipment during testing, ensuring that the impact test is conducted stably in a fixed position. The height-adjustable support leg 15 can precisely level the frame 10, eliminating structural stress and vibration interference caused by uneven ground. This design allows the equipment to retain the advantage of convenient movement while obtaining rigid support comparable to fixed installation during testing, fundamentally solving the contradiction between mobility and stability, and ensuring the accuracy and repeatability of test data.

[0045] In an optional embodiment of the present invention, an elastic buffer pad (not shown) is provided on the base 11, and the elastic buffer pad is at least located below the trolley case 100 suspended by the hook 25. By providing an elastic buffer pad on the base 11, the present invention provides important safety redundancy for the testing process; when the trolley case 100 falls from the suspension point due to an accident (such as hook failure or component breakage), the elastic buffer pad can effectively absorb its impact kinetic energy, preventing the case from directly colliding with the rigid base 11 and causing damage. This design not only protects the test sample and reduces accidental losses, but more importantly, through soft contact cushioning, it significantly reduces the risk of debris splashing or the case rebounding and injuring surrounding personnel, thereby improving the safety protection level of the equipment and creating a safer and more reliable testing environment.

[0046] In summary, this invention, through the coordinated control of a dual-rod cylinder 20 and an electromagnetic control valve 40, can sequentially achieve the three testing stages of lifting, releasing, and buffering using only a single power source: At station one, the air source 30 is connected to the first chamber 22, causing the piston 21 to smoothly lift the pull-rod box 100; switching to station two, the first chamber 22 and the second chamber 23 are connected to form a loop, allowing the piston 21 to fall rapidly under gravity for instantaneous release; upon entering station three, the two chambers are connected via a damping valve 50, utilizing the semi-enclosed air cushion effect formed by the compressed gas in the cylinder to achieve gentle buffering. This design fundamentally eliminates the traditional independent lifting and releasing mechanism, significantly simplifying the mechanical structure, reducing manufacturing costs and maintenance difficulty, and effectively reducing noise and improving the working environment by replacing mechanical collision with pneumatic buffering; simultaneously, the buffering stroke and force can be flexibly controlled by adjusting the switching timing and the opening of the damping valve 50, enabling the equipment to adapt to different specifications of test pieces and testing standards, greatly improving the reliability, adaptability, and control accuracy of impact testing.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

[0048] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

Claims

1. A suitcase impact testing device, characterized in that, include: Rack (10); A double-rod cylinder (20) is vertically mounted on the frame (10). The piston (21) chamber of the double-rod cylinder (20) is divided by the piston (21) into a first chamber (22) located below the piston (21) and a second chamber (23) located above the piston (21). The lower end of the piston rod (24) of the double-rod cylinder (20) is provided with a hook (25) for suspending the pull rod or handle of the trolley case (100). A gas source (30) is used to provide driving gas to the dual-rod cylinder (20); An electromagnetic control valve (40) is disposed between the first chamber (22), the second chamber (23), and the air source (30), and the electromagnetic control valve (40) is configured to switch between the following positions: At workstation one, the electromagnetic control valve (40) connects the air source (30) to the first chamber (22) and connects the second chamber (23) to the atmosphere; At station two, the electromagnetic control valve (40) connects the first chamber (22) to the second chamber (23); and At station three, the electromagnetic control valve (40) connects the first chamber (22) to the second chamber (23) via a damping valve (50); It also includes a controller (60) for controlling the electromagnetic control valve (40) to switch between the first station, the second station and the third station.

2. The impact testing device for a suitcase according to claim 1, characterized in that, It also includes a position detection unit (70) for detecting the position of the piston rod (24) of the double-rod cylinder (20), the position detection unit (70) being electrically connected to the controller (60); the piston rod (24) of the double-rod cylinder (20) reciprocates between a first position and a second position in a vertical direction, wherein the first position is located below the second position, and there is a third position between the first position and the second position; the controller (60) is configured to: when the piston rod (24) moves upward from the first position to the second position, the controller (60) controls the electromagnetic control valve (40) at the first work station to switch to the second work station; when the piston rod (24) moves downward from the second position to the third position, the controller (60) controls the electromagnetic control valve (40) at the second work station to switch to the third work station; when the piston rod (24) moves downward from the third position to the first position, the controller (60) controls the electromagnetic control valve (40) at the third work station to switch to the first work station.

3. The impact testing device for a suitcase according to claim 2, characterized in that, It also includes an input module electrically connected to the controller (60), the controller (60) being configured to respond to user operations on the input module by adjusting the relative distance between the first position and the second position, and / or the relative distance between the second position and the third position, and / or the relative distance between the third position and the first position.

4. The impact testing device for a suitcase according to claim 1, characterized in that, The electromagnetic control valve (40) includes a three-position five-way solenoid valve, which includes a first interface (1), a second interface (2), a third interface (3), a fourth interface (4), and a fifth interface (5). The first interface (1) is connected to the air source (30), the second interface (2) is connected to the atmosphere, the third interface (3) is connected to the first chamber (22), the fourth interface (4) is connected to the second chamber (23), and the fifth interface (5) is connected to the first chamber (22) via the damping valve (50). Inside the three-position five-way solenoid valve, in response to the first station, the first interface (1) is connected to the third interface (3), the second interface (2) is connected to the fourth interface (4), in response to the second station, the third interface (3) is connected to the fourth interface (4), and in response to the third station, the fourth interface (4) is connected to the fifth interface (5).

5. The impact testing device for a suitcase according to claim 3, characterized in that, The damping valve (50) is an electromagnetic damping valve with adjustable damping. The electromagnetic damping valve is electrically connected to the controller (60), which is configured to respond to user operations on the input module and adjust the damping of the electromagnetic damping valve.

6. The impact testing device for a suitcase according to claim 2, characterized in that, The position detection unit (70) includes a potentiometer, the length direction of which is parallel to the axial direction of the double-rod cylinder (20), the housing of which is fixedly connected to the cylinder body of the double-rod cylinder (20), and the probe (71) of which is fixedly connected to the piston rod (24) of the double-rod cylinder (20).

7. The impact testing device for a suitcase according to claim 1, characterized in that, The frame (10) includes a base (11), two support arms (12) disposed on the base (11), and a crossbeam (13) disposed between the upper ends of the two support arms (12), and the double-rod cylinder (20) is mounted on the crossbeam (13).

8. The impact testing apparatus for a suitcase according to claim 7, characterized in that, Casters (14) are provided below the base (11).

9. The impact testing apparatus for a suitcase according to claim 8, characterized in that, The base (11) is provided with a locking device for locking the caster (14) to prevent it from rotating, or the base (11) is provided with a height-adjustable support leg (15).

10. The impact testing apparatus for a suitcase according to claim 7, characterized in that, The base (11) is provided with an elastic cushioning pad, which is located at least below the suitcase (100) suspended by the hook (25).

Images