Oscillation table with high-degree-of-freedom stress-strain energy

Abstract

The invention relates to the field of static or dynamic balance testing of machines or structural parts, in particular to a high-degree-of-freedom stress-strain energy oscillation table, which comprises an oscillation mechanism, an oscillation mechanism and a control mechanism, the shock excitation mechanism comprises a shock excitation spring for buffering and an oscillation air hammer for providing shock excitation power, so that the oscillation mechanism can oscillate in a relatively large range; the buffer mechanism comprises a buffer spring and is used for bearing the weight and vibration of the oscillation mechanism and the excitation mechanism and driving the oscillation mechanism and the excitation mechanism to return to the initial position; wherein the oscillation mechanism is connected with the buffer mechanism through the excitation mechanism; the oscillating mechanism further comprises a conversion module suitable for being in contact with the oscillating air hammer. And the oscillating air hammer is obliquely mounted. According to the oscillation table with high-degree-of-freedom stress-strain energy, the resonant frequency range of the high-frequency random oscillation table is widened, and the product detection accuracy of the high-frequency random oscillation table is improved.

Description

Technical Field

[0001] The present invention relates to the field of testing the static or dynamic balance of machine or structural components, and particularly to an oscillating table with high-degree-of-freedom stress-strain energy. Background Art

[0002] Highly Accelerated Life Test (HALT) is an important reliability test method. By applying extreme environmental conditions (such as temperature, vibration, etc.), it simulates various stresses that a product may encounter during actual use, aiming to detect potential defects and failure modes of the product as early as possible. Currently, the vibration environment of the high-frequency random vibration table used in HALT tests is three-axis six-degree-of-freedom random vibration, that is, full-axis random vibration. This vibration environment is achieved by repeatedly impacting with pneumatic hammers, which is called a Repetitive Shock (RS) machine in engineering. Electronic products need to meet the requirements of waterproof, vibration-proof, and anti-static; electronic products contain parts such as lithium batteries, motors, and chips; in an electronic product, the natural resonance frequency bands of electronic components are all different, and the resonance frequency ranges of various products are as follows: waterproof, vibration-proof, and anti-static products: 2 - 100 (Hz), motor products: 100 - 200 (Hz), lithium batteries: 200 - 500 (Hz), electronic components: 500 - 2K (Hz), circuit boards: 2K - 5K (Hz), chip semiconductors: 5K - 10K (Hz).

[0003] Currently, the effective frequency range of the tabletop of the high-frequency random vibration table used in HALT tests generally focuses on the range of 500 - 5000 Hz. It cannot be used in the frequency bands above 5000 Hz and below 500 Hz, and there is a technical problem of a small resonance frequency range of the high-frequency random vibration table. There is an urgent need for an oscillating table with high-degree-of-freedom stress-strain energy. It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application, and therefore, it may include information that does not constitute prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide an oscillating table with high-degree-of-freedom stress-strain energy to solve the above problems.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An oscillating table with high-degree-of-freedom stress-strain energy, comprising:

[0007] An oscillating mechanism, which includes an oscillating platform for placing products;

[0008] An exciting mechanism, which includes an exciting spring for buffering and an oscillating pneumatic hammer for providing exciting power, so that the oscillating mechanism can oscillate within a large range;

[0009] A buffer mechanism, which includes a buffer spring for bearing the weights and vibrations of the oscillation mechanism and the excitation mechanism and driving the oscillation mechanism and the excitation mechanism back to the initial position; wherein

[0010] The oscillation mechanism is connected to the buffer mechanism through the excitation mechanism.

[0011] In an optional embodiment, the oscillation mechanism further includes a conversion module adapted to contact with an oscillation pneumatic hammer;

[0012] The oscillation pneumatic hammer is installed obliquely so that the oscillation pneumatic hammer periodically drives the oscillation platform through the conversion module.

[0013] In an optional embodiment, the oscillation mechanism further includes connecting bolts adapted to connect the conversion module and the oscillation platform;

[0014] The oscillation pneumatic hammer is installed at an angle of 45 degrees to the horizontal plane.

[0015] In an optional embodiment, the excitation mechanism further includes an excitation integrated platform connected to the buffer mechanism;

[0016] One end of the oscillation pneumatic hammer is arranged at the excitation integrated platform, and the other end of the oscillation pneumatic hammer faces the conversion module. In an optional embodiment, the conversion module is fixedly arranged in the middle of the oscillation platform facing the excitation integrated platform; the oscillation pneumatic hammers are symmetric about the conversion module.

[0017] In an optional embodiment, the buffer springs are symmetric about the conversion module;

[0018] One end of the buffer spring is connected to the excitation integrated platform, and the other end of the buffer spring is separated from the excitation integrated platform.

[0019] In a second aspect, the embodiments of the present disclosure further provide an oscillation platform with high-degree-of-freedom stress-strain energy, including:

[0020] An oscillation mechanism, which includes an oscillation platform for placing products;

[0021] An excitation mechanism, which includes an excitation spring for buffering and an oscillation pneumatic hammer for providing excitation power so that the oscillation mechanism can oscillate within a large range;

[0022] A buffer mechanism, which includes a buffer spring for bearing the weights and vibrations of the oscillation mechanism and the excitation mechanism and driving the oscillation mechanism and the excitation mechanism back to the initial position; wherein

[0023] The oscillation mechanism is connected to the buffer mechanism through the excitation mechanism;

[0024] The oscillating mechanism, the exciting mechanism, and the buffering mechanism all include load-bearing gussets, and the load-bearing gussets are adapted to be connected to the ends of the exciting springs and the buffering springs.

[0025] In an alternative embodiment, the oscillating mechanism further includes a conversion module adapted to contact the oscillating pneumatic hammer;

[0026] The oscillating pneumatic hammer is installed obliquely so that the oscillating pneumatic hammer periodically drives the oscillating platform through the conversion module.

[0027] In an alternative embodiment, the oscillating mechanism further includes connecting bolts adapted to connect the conversion module and the oscillating platform;

[0028] The oscillating pneumatic hammer is installed at an angle of 45 degrees to the horizontal plane.

[0029] The beneficial effects of the present invention are as follows: An oscillating table with high-degree-of-freedom stress-strain energy is provided. By using the oscillating mechanism, the exciting mechanism, and the buffering mechanism in cooperation, an oscillating table with high-degree-of-freedom stress-strain energy is fabricated to replace the oscillating table with a small resonance frequency range, achieving the resonance effect of the oscillating table within the frequency range of 0 to 10,000 Hz, improving the resonance frequency range of the high-frequency random vibration table, and improving the accuracy of the high-frequency random vibration table for detecting products. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is an exploded view of the combined parts of the oscillating table.

[0032] Figure 2 It is an assembly drawing of the combined parts of the oscillating table.

[0033] Figure 3 It is a schematic diagram of the hardware structure of the oscillating table.

[0034] Figure 4 It is a schematic diagram of the oscillating mechanics of the oscillating table.

[0035] Figure 5 It is a schematic diagram of the working principle of the oscillation (impact state).

[0036] Figure 6 It is a schematic diagram of the working principle of the oscillation (non-impact state).

[0037] Figure 7 It is a technical effect diagram of the oscillating table.

[0038] Figure 8 It is an explanatory diagram of an embodiment of the oscillation table.

[0039] Figure 9 It is a spectrum power diagram of the implementation result of the oscillation table.

[0040] In the figure: 1. Oscillation mechanism; 11. Oscillation platform; 12. Conversion module; 13. Load-bearing gusset plate;

[0041] 2. Excitation mechanism; 21. Excitation spring; 22. Oscillation air hammer; 23. Excitation integrated platform;

[0042] 3. Buffer mechanism; 31. Buffer spring. Specific implementation manner

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] In this document, when it is mentioned that the first component is located on the second component, this may mean that the first component can be directly formed on the second component, or a third component can be inserted between the first component and the second component. In addition, in the drawings, to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.

[0045] In this document, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0046] The terms used herein are only for describing a specific exemplary configuration and are not intended to be limiting. As used herein, the singular articles "a", "an", and "the" may also be intended to include the plural forms, unless it is clearly stated otherwise in the context. The terms "comprising", "including", and "having" are inclusive and thus specify the presence of the specified features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or their combinations.

[0047] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the particular feature, structure, or characteristic after the phrase can be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, terms such as "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or. On the contrary, the use of terms such as "example", "exemplary", etc. is intended to present concepts in a concrete manner.

[0048] It should be noted that: like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0049] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0050] Referring to Figures 1 to 9 , at least one embodiment provides an oscillating table with a high degree of freedom stress-strain energy, which is composed of three parts: an oscillating mechanism 1, an exciting mechanism 2, and a buffer mechanism 3. The assembly process is as follows: the buffer mechanism 3 is the lowest layer of the oscillating table and is installed first. Then, the exciting mechanism 2 is installed on top of the buffer mechanism 3, and finally, the oscillating mechanism 1 is installed on top of the exciting mechanism 2.

[0051] The assembly processes of the three components are described separately as follows: The following parts of the oscillation mechanism 1 are connected in sequence: the oscillation platform 11, the connecting bolt, the load-bearing angle plate 13, and the conversion module 12. The number of oscillation platforms 11 is one, which is threadedly connected to one end of the connecting bolt; the other end of the connecting bolt is threadedly connected to the load-bearing angle plate 12. The middle part of the oscillation platform 11 is threadedly connected to the conversion module 12. One end of the conversion module 4 is threadedly connected to the oscillation platform 11 through several connecting bolts, and the other end has four impact surfaces symmetrically arranged at a 45° angle. The impact surfaces correspond to the impact cylinder end faces of the oscillation air hammer 22 at a 45° angle, and a distance of 1 mm is maintained when static. The following parts of the excitation mechanism 2 are connected in sequence: the oscillation spring seat, the excitation spring, the oscillation air hammer, the excitation spring seat, the excitation load-bearing angle plate, the excitation upper connecting bolt, the excitation integrated platform, and the excitation lower connecting bolt. The following parts of the buffer mechanism 3 are connected in sequence: the damping load-bearing angle plate, the buffer upper spring seat, the buffer spring, and the buffer lower spring seat. The number of damping load-bearing angle plates is four, which are symmetrically arranged at the four corners of the device. One side of the load-bearing angle plate is threadedly connected to the excitation lower connecting bolt, and the other end is connected to the buffer upper spring seat. The number of buffer upper spring seats is four, which are symmetrically arranged at the four corners of the device. One end of the buffer upper spring seat is threadedly connected to the buffer mechanism load-bearing angle plate, and the other cylindrical end is sleeved with the buffer spring 31. The buffer upper spring seat is movably sleeved with the spring; the number of buffer springs 31 is four, which are symmetrically arranged at the four corners of the buffer mechanism 3. One end of the buffer spring 31 is inserted into the buffer upper spring seat, and the other end is inserted into the buffer lower spring seat. The number of buffer lower spring seats is four, which are symmetrically arranged at the four corners of the buffer mechanism 3. The buffer lower spring seat is located at the bottom of the device.

[0052] The oscillation mechanism 1 includes: the oscillation platform 11, the connecting bolt, the load-bearing angle plate 13, and the conversion module 12. The oscillation platform 11 is the base for placing the test product. The oscillation platform 11 is supported by four symmetrically arranged springs. The excitation mechanism 2 includes: the oscillation spring seat, the excitation spring 21, the oscillation air hammer 22, the excitation spring seat, the load-bearing angle plate, the excitation upper connecting bolt, the excitation integrated platform 23, and the excitation lower connecting bolt. When the oscillation air hammer 22 is working, the end face of the impact terminal of the oscillation air hammer 22 collides with the conversion module 12 periodically, thereby providing vibration energy for the oscillation platform 11. The buffer mechanism 3 includes: the damping load-bearing angle plate, the buffer upper spring seat, the buffer spring 31, and the buffer lower spring seat. The buffer mechanism 3 mainly bears the weight and vibration of the oscillation mechanism 1 and the excitation mechanism 2, and drives the oscillation mechanism 1 and the excitation mechanism 2 back to the initial position. Repeated impacts of the oscillation air hammer 22 on a rigid aluminum plate will cause stress and strain effects on the aluminum plate itself, that is, the tabletop of the oscillation platform 11 can generate vibration energy. The frequency range of this vibration energy is affected by the aluminum plate, that is, the material and structure of the oscillation platform 11 itself and its inherent resonance frequency.

[0053] The natural resonance frequency of the oscillation table refers to the frequency determined by its own physical characteristics without external driving or damping effects. Each part that makes up the oscillation table has one or more natural frequencies, which are determined by the shape, size, material properties, and connection methods of the parts. Therefore, the following three parameters need to be considered for the overall oscillation table: mass M, stiffness S, and elasticity E. The influencing factors of the natural frequency of an object are as follows: mass of the part: the greater the mass, the lower the natural frequency usually is. Increasing the mass will reduce the vibration frequency of the part because a heavier object requires more force to generate the same amplitude of vibration energy. Stiffness: Stiffness is the ability of a part to resist deformation. The greater the stiffness, the higher the natural frequency. Increasing the stiffness will make the structure more difficult to deform, thus increasing its natural frequency. Geometric shape and size of the part: Parts with different shapes have different vibration characteristics, and dimensions such as length, width, and thickness will affect their natural frequencies. Elasticity: The connection method of the parts will also affect their natural frequencies.

[0054] Achieve the goal of vibration frequency in the range of 0 - 10000 Hz. Adjust the oscillation table based on three parameters: mass M, rigidity S, and elasticity E. The materials, shapes, and dimensions of the various parts that make up the oscillation table determine the type of vibration energy generated by the oscillation table. It is necessary to use simulation technology and finite element analysis to simulate the motion effect of the oscillation table. The following are the simulation results: Mass M: Oscillation platform 1: It is a square aluminum plate with dimensions of 610 in length * 610 in width * 16 mm in thickness, quantity 1, and weight 12725 g. Connecting bolts: They are cylindrical, quantity 36, weight 225 g, total weight 8100 g. Load-bearing angle plates on the oscillation mechanism: L-shaped aluminum plates with length and width dimensions of 170 * 170 mm and thickness of 17 mm, quantity 4, weight 1000 g, total weight 4000 g. Conversion module 12: It is an aluminum block with a hollow in the middle, and one end extends with a 45° inclined plane. Quantity of conversion module 12 is 1, weight 1398 g. Oscillation spring seat: Barrel-shaped, maximum size Φ101 mm, height 44.5 mm; the size of the hollow circular hole in the middle is Φ70.5 mm, depth 39 mm, quantity 1, weight 914 g. Excitation spring 21: Cylindrical spring, size Φ70 mm, height 100 mm, spring wire diameter 7 mm, spring load-bearing specification 113 kg, quantity 4, weight 240 g, total weight 960 g. Oscillation air hammer 22 is cylindrical, size Φ68.5 mm, length 150 mm, with a large arc chamfer at one end and an impact cylinder at the other end, size ф24 mm, length 20 mm. There are air inlet and outlet ports on the cylinder; quantity of oscillation air hammer 22 is 4, weight 3200 g, total weight 12800 g. Excitation spring seat is barrel-shaped, size Φ101 mm, height 44.5 mm; the size of the hollow circular hole in the middle is Φ70.5 mm, depth 39 mm, quantity 4, weight 914 g, total weight 3656 g. Load-bearing angle plates under the oscillation mechanism: They are L-shaped aluminum plates with maximum length and width dimensions of 170 * 170 mm and thickness of 17 mm, quantity 4, weight 225 g, total weight 900 g. Quantity of upper connecting bolts for excitation is 12, weight 225 g, total weight 2700 g. Excitation integrated platform 23 is a square aluminum plate with dimensions of 610 in length * 610 in width * 16 mm, and three M30 internal threaded holes are set at all four corners, with a hole spacing of 100 mm for the three holes. There is a rectangular hollow in the middle of the lower load-bearing angle plate, with a length of 200 mm and a width of 200 mm. Quantity of the lower load-bearing angle plate is 1, weight 12725 g. Quantity of lower connecting bolts for excitation is 12, weight 334 g, total weight 4008 g. Vibration damping load-bearing angle plates are L-shaped aluminum plates with length and width dimensions of 170 * 170 mm and thickness of 17 mm, quantity 4, weight 1000 g, total weight 4000 g. Spring seats on the vibration damping mechanism have a maximum size of Φ101 mm and height of 44.5 mm; quantity of spring seats on the vibration damping mechanism is 4, weight 914 g, total weight 3656 g.The size of the shock-absorbing mechanism spring is Φ70mm, height 100mm, and wire diameter 7mm; the number of shock-absorbing mechanism springs is 4, weight 240g, total weight 960g. The size of the lower spring seat of the shock-absorbing mechanism is Φ101mm, height 44.5mm; the number of lower spring seats of the shock-absorbing mechanism is 4, weight 914g, total weight 3656g.

[0055] Oscillation mechanism 1: Total weight 26223g, including: oscillation platform 11, connecting bolts, oscillation load-bearing angle plates, conversion module 4. Excitation mechanism 2: Total weight 38663g, including: oscillation spring seat, excitation spring 21, oscillation air hammer 22, excitation spring seat, excitation load-bearing angle plates, upper excitation connecting bolts, excitation integrated platform 23, lower excitation connecting bolts. Buffer mechanism 3: Total weight 12272g, including: buffer load-bearing angle plates, upper buffer spring seats, buffer springs 31, lower buffer spring seats. The total weight of the oscillation table is 77158g.

[0056] The materials of the oscillation platform 11, upper load-bearing angle plates of the oscillation mechanism, conversion module 4, lower load-bearing angle plates of the oscillation mechanism, excitation integrated platform 23, and buffer load-bearing angle plates are aluminum alloy, model 6061; the surface of the aluminum plate is treated by hard anodization.

[0057] The materials of the connecting bolts, oscillation spring seats, excitation spring seats, upper excitation connecting bolts, lower excitation connecting bolts, upper spring seats of the shock-absorbing mechanism, and lower spring seats of the shock-absorbing mechanism are stainless steel, model 304.

[0058] The materials of the excitation spring 21 and buffer spring 31 are spring steel, and the performance range of the spring steel is 104 - 105 N / m; the excitation spring 21 and buffer spring 31 bear a weight of 113 kg. The size of the excitation spring 21 and buffer spring 31 is Φ70mm, height 100mm, and wire diameter 7mm.

[0059] The size of the excitation spring seat is Φ101mm, height 44.5mm. It is symmetrically arranged at the four corners of the excitation mechanism of the device. One end of each spring seat is threadedly connected to the oscillation load-bearing angle plate, and the other end is sleeved with a spring. The inner hole depth of the spring seat is 39mm. The spring seat is movably sleeved with the spring. The size of the round hole of the spring seat is Φ70.5mm, while the outer size of the spring is Φ70mm. By repeatedly impacting the oscillation platform 11 with the oscillation air hammer 22, a random vibration test environment is generated. The tabletop of the oscillation platform 11 is a square aluminum plate, which is the carrier of vibration energy. The tabletop of the oscillation platform 11 is the vibration environment planned for the oscillation table. The vibration environment is the area where the performance changes of the aluminum plate occur under the repeated action of stress or strain. The oscillation table needs to consider three parameters in collision dynamics: acting force F, reaction force N, and gravity G.

[0060] Oscillation mechanism 1: In the oscillation mechanism, the oscillation platform 11 is subjected to the acting force F of the oscillation pneumatic hammer 22, so that the vibration energy generated on the tabletop of the oscillation platform 11 directly provides excitation for the product under test. The acting force F provided by the oscillation pneumatic hammer 22 is converted through the conversion module 12 in the oscillation mechanism. The acting force F of the linear motion of the oscillation pneumatic hammer 22 is converted into a random vibration force, so that the vibration energy of high-degree-of-freedom stress and strain is generated on the tabletop of the oscillation platform 11.

[0061] In the oscillation mechanism 1, when the oscillation platform 11 is subjected to the acting force F of the oscillation pneumatic hammer 22, a reaction force N will be generated, and the weight of the oscillation mechanism 2 itself will generate a gravity G. The oscillation platform 11 is supported by the excitation spring 21 to ensure that the oscillation table remains balanced during operation. The excitation spring 21 bears the reaction force N and the gravity G during the operation of the oscillation mechanism, and keeps the oscillation mechanism 1 in the initial position, providing the elastic space required by the oscillation mechanism 1.

[0062] Excitation mechanism 2: Provide a gas pressure of 0.1 - 1 MPa to the oscillation pneumatic hammer 22; the oscillation pneumatic hammer 22 arranged at an inclined angle of 45° on the excitation integrated platform 23 collides periodically with the opposite surface of the conversion module 12, generating a collision acting force F to provide vibration energy for the oscillation platform 11. When the oscillation pneumatic hammer 22 impacts the end face of the impact cylinder of the conversion module 12, a vibration amplitude of 15 mm, an impact thrust of 100 - 300 Kg, and an impact frequency above 1000 Hz can be generated. After the oscillation pneumatic hammer 22 is ventilated and operates, the energy is transmitted to the conversion module 12 in a linear impact manner.

[0063] Buffer mechanism 3: The buffer mechanism 3 mainly bears the weight and vibration of the oscillation mechanism 1 and the excitation mechanism 2, and bears the reaction force N and the gravity G accumulated during the operation of the oscillation mechanism 1 and the excitation mechanism 2.

[0064] Device Oscillation Working Principle: The oscillating air hammer 22 repeatedly impacts the oscillating platform 11, causing the surface of the oscillating platform 11 to vibrate. The frequency range of this vibration energy is determined by the inherent resonance frequency of the oscillating platform 11 itself, and the spectral shape of the frequency range that can be provided belongs to the medium to high frequency band. The full-frequency vibration energy of the oscillating table needs to be achieved through the combination of vibration and oscillation. The oscillation working effect of the oscillating table comes from the fact that the oscillating air hammer 22 maintains an initial distance of 1 mm from the impact surface, which will cause a relatively large displacement of the aluminum plate itself after being impacted by the impact force. The relatively large displacement is the effect of low frequency, enabling the oscillating table to generate low-frequency vibrations, so that the oscillating table has vibrations in the low, medium, and high frequency ranges, presenting an energy distribution of 0-10,000 Hz full frequency. When the oscillating platform is periodically acted upon by the oscillating air hammer 22, the frequency of the driving force of the oscillating air hammer 22 is close to the inherent frequency of the oscillating mechanism itself, and a resonance phenomenon will occur, causing the amplitude to increase sharply. The core mechanism of oscillation is related to the restoring force of the oscillating table. When the oscillating table deviates during operation, the spring will apply a restoring force proportional to the displacement to pull the oscillating table back to the equilibrium position; this process will generate periodic oscillations under the cooperation of the elastic force of the spring and the inertia of the oscillating table. When the oscillating air hammer 22 moves linearly and impacts the conversion module 12, it will generate torsion on the oscillating platform 11 and at the same time convert it into a force of random vibration, generating vibration energy with high degrees of freedom of stress and strain on the surface of the oscillating platform 11 (refer to Figure 4 ).

[0065] The present device will be further described in detail below with reference to the power spectral density diagram: Connect the input port of the oscillating air hammer 22 to high-pressure gas. After the gas is introduced, the oscillating table starts to operate. The vibration acceleration gauge sensor collects the vibration energy generated after the oscillating table operates on the surface of the oscillating platform 11 and presents the vibration energy in the form of a vibration spectrum power diagram. After analysis by a vibration spectrum analyzer, it is shown that on the operation calculator display screen of the instrument, the vibration environment of the oscillating table is achieved by the repeated impact of the oscillating air hammer 22. The oscillating air hammer 22 repeatedly impacts the oscillating platform 11, causing the surface of the oscillating platform 11 to generate vibration energy. The frequency range of the vibration energy is affected by the natural resonance frequency of the oscillating platform 11, and the frequencies that can be provided belong to the middle and high frequency segments in the spectrum shape; the full-frequency vibration energy of the oscillating table requires vibration and oscillation to be achieved together. The oscillating effect of the oscillating table comes from the fact that the impact surface of the oscillating air hammer 22 and the conversion module 12 maintain an initial distance of 1 mm, which will cause the oscillating platform 11 and the conversion module 12 to have a large displacement after being impacted by the force. The large displacement is the effect of low frequency, which is an effect of high-degree-of-freedom stress and strain, enabling the oscillating table to generate the low-frequency part in the frequency range, so that the oscillating table has a vibration energy distribution in the low, middle, and high frequency ranges, presenting an energy distribution over the full frequency range of 0 - 10,000 Hz. Taking a high-frequency electronic device that needs to undergo a HALT test as an example; during the test, an oscillating table with high-degree-of-freedom stress and strain energy is used to provide energy over the full frequency range of 0 - 10,000 Hz to simulate the vibration stresses of various frequencies that the device may encounter during actual use; it can prevent products with different natural frequency segments from missing the opportunity to discover product defects; the oscillating table with high-degree-of-freedom stress and strain energy solves the problem that the excitation frequency of the existing resonance energy device does not exactly correspond to the natural frequency of the test product (refer to Figure 8 and Figure 9 ).

[0066] Although the embodiments of the present invention are described in the specification, these embodiments are only for reference and should not limit the protection scope of the present invention. All omissions, substitutions, and changes made within the scope not departing from the gist of the present invention should be included in the protection scope of the present invention.

[0067] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0069] Although this patent document contains many details, it should not be construed as limiting any invention or the scope of any claim, but rather as a description of the features of a particular embodiment of a particular invention. Certain features described in the context of separate embodiments of this patent document may also be implemented in combination in a single embodiment. Conversely, the various functions described in the context of a single embodiment may also be implemented separately in multiple embodiments, or in any suitable sub-combination. In addition, although the above features may be described as acting in certain combinations, and even initially claimed as such, in some cases, one or more features of a claim combination may be removed from the combination, and the claim combination may be directed to a sub-combination or a variant of a sub-combination.

[0070] Similarly, although the operations are described in a particular order in the drawings, this should not be construed as requiring that such operations be performed in the particular order or sequence shown, or that all of the illustrated operations be performed, to obtain the desired result. In addition, the separation of various mechanism components in the embodiments of this patent document should not be construed as required in all embodiments.

[0071] Only some implementations and examples are described, and other implementations, enhancements, and variations can be made based on what is described and illustrated in this patent document.

[0072] Although several embodiments are provided in this disclosure, it should be understood that the disclosed mechanisms and methods may be embodied in many other specific forms without departing from the spirit or scope of this disclosure. The current examples are considered illustrative rather than restrictive and are not limited to the details given. For example, various elements or components may be combined or integrated in another mechanism, or certain features may be omitted or not implemented.

Claims

1. An oscillating table with high degree of freedom stress-strain energy, characterized in that: include: An oscillating mechanism (1) comprising an oscillating platform (11) on which a product is placed; The excitation mechanism (2) comprises an excitation spring (21) for buffering and an oscillation air hammer (22) for providing excitation force, so that the oscillation mechanism (1) can oscillate within a relatively large range; The buffer mechanism (3) comprises a buffer spring (31) for bearing the weight and vibration of the oscillating mechanism (1) and the exciting mechanism (2), and maintaining and restoring the initial positions of the oscillating mechanism (1) and the exciting mechanism (2); wherein The oscillating mechanism (1) is connected to the buffer mechanism (3) via a vibration exciting mechanism (2); The oscillating mechanism (1) further comprises a conversion module (12) adapted to contact with the oscillating air hammer (22); The oscillating air hammer (22) is installed at an angle so that the oscillating air hammer (22) periodically drives the oscillating platform (11) through the conversion module (12); The oscillation mechanism (1) further comprises connecting bolts suitable for connecting the conversion module (12) and the oscillation platform (11); The oscillating air hammer (22) is installed at an angle of 45 degrees to the horizontal plane.

2. The high degree of freedom stress-strain energy oscillation table according to claim 1, characterized in that: The vibration excitation mechanism (2) further comprises a vibration excitation integrated platform (23) connected to the buffer mechanism (3); One end of the oscillating air hammer (22) is arranged on the vibration integration platform (23), and the other end of the oscillating air hammer (22) faces the conversion module (12).

3. The high degree of freedom stress-strain energy oscillation table according to claim 2, characterized in that: The conversion module (12) is fixedly arranged at the middle part of the oscillation platform (11) facing the excitation integration platform (23); The oscillating air hammer (22) is symmetrical with respect to the conversion module (12).

4. The high degree of freedom stress-strain energy oscillation table according to claim 1, characterized in that: The buffer spring (31) is symmetrical with respect to the conversion module (12); One end of the buffer spring (31) is connected to the vibration-exciting integrated platform (23), and the other end of the buffer spring (31) is separated from the vibration-exciting integrated platform (23).

5. A high degree of freedom stress-strain energy oscillation table, characterized in that: include: An oscillating mechanism (1), comprising an oscillating platform (11) on which a product is placed; The excitation mechanism (2) comprises an excitation spring (21) for buffering and an oscillation air hammer (22) for providing excitation force, so that the oscillation mechanism (1) can oscillate within a relatively large range; The buffer mechanism (3) comprises a buffer spring (31) for bearing the weight and vibration of the oscillating mechanism (1) and the exciting mechanism (2), and maintaining and restoring the initial positions of the oscillating mechanism (1) and the exciting mechanism (2); wherein The oscillating mechanism (1) is connected to the buffer mechanism (3) via a vibration exciting mechanism (2); The oscillating mechanism (1), the exciting mechanism (2) and the buffer mechanism (3) all comprise a load-bearing angle plate (13), and the load-bearing angle plate (13) is suitable for being connected to the ends of the exciting spring (21) and the buffer spring (31).

6. The high degree of freedom stress-strain energy oscillation table according to claim 5, characterized in that: The oscillating mechanism (1) further comprises a conversion module (12) adapted to contact with the oscillating air hammer (22); The oscillating air hammer (22) is installed at an angle so that the oscillating air hammer (22) periodically drives the oscillating platform (11) through the conversion module (12).

7. The high degree of freedom stress-strain energy oscillation table according to claim 6, characterized in that: The oscillation mechanism (1) further comprises connecting bolts suitable for connecting the conversion module (12) and the oscillation platform (11); The oscillating air hammer (22) is installed at an angle of 45 degrees to the horizontal plane.

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