An impact testing apparatus

Abstract

The utility model provides a kind of impact test equipment, including impact vibration device, it is characterized by: still including displacement adjustment mechanism and signal amplification mechanism with the impactor assembly connection of the impact vibration device, the displacement adjustment mechanism is assembled connection with the signal amplification mechanism by connecting piece;Fixing mechanism, one end with the base station assembly fixed of the impact vibration device, the other end with the signal amplification mechanism assembly connection.The utility model provides a kind of impact test equipment, by setting signal amplification multiple, so that existing electric type vibration table can realize greater acceleration and displacement order of magnitude under the condition of output smaller thrust.

Description

Technical Field

[0001] This utility model relates to the field of automatic control testing equipment technology, and in particular to an impact testing device. Background Technology

[0002] To ensure the safe operation of rail vehicles, onboard components and devices need to undergo impact tests on an electric vibration table before assembly. However, existing electric vibration tables can only achieve a maximum impact acceleration of 100g, and the maximum displacement on one side can only reach about 25mm.

[0003] For certain specialized products, such as smaller components on rail vehicles, the required acceleration and displacement for impact testing are excessively high according to standards. For example, if the required acceleration exceeds 100g, and the impact acceleration magnitude is large with a long pulse width, the test displacement exceeds 25mm. This renders existing electric vibration tables unable to meet the testing requirements. The locomotive wheel flange lubrication device adopts the Class 2 impact test conditions in IEC61373-2010, with a peak acceleration of 30g, a pulse width of 18ms, and a test displacement of 28.1mm. The brake caliper adopts the Class 3 impact test conditions in IEC61373-2010 with a peak acceleration of 100g and a pulse width of 6ms. Considering that it will cause less damage to the electric vibration table, the maximum acceleration of the electric vibration table can reach 80g, which does not meet the test magnitude of 100g. Moreover, if it is directly installed on the electric vibration table for impact testing, the test thrust cannot be met.

[0004] Furthermore, existing electric vibration tables and impact tables are two different types of equipment. If an impact table is used to complete a large number of impact tests, a new model needs to be selected and purchased, increasing the cost of the test equipment. However, since the moving parts of the electric vibration table are relatively heavy, the existing electric vibration table requires a large thrust when conducting large number of impact tests, which means that the required driving current is too large, which can easily lead to the coil overheating and burning out.

[0005] Therefore, it is necessary to design an impact testing device that can utilize existing electric vibration tables to achieve greater acceleration and displacement. Utility Model Content

[0006] To address the technical problems in the prior art, this utility model provides an impact testing device that enables existing electric vibration tables to achieve larger acceleration and displacement magnitudes with relatively small output thrust.

[0007] To solve the above-mentioned technical problems, this utility model provides an impact testing device, which adopts the following technical solution: An impact testing apparatus includes an impact vibration device, a displacement adjustment mechanism assembled and connected to the impactor of the impact vibration device, and a signal amplification mechanism assembled and connected to the device under test. The displacement adjustment mechanism is assembled and connected to the signal amplification mechanism via a connector. The fixing mechanism is assembled and fixed at one end to the base of the impact vibration device, and assembled and connected at the other end to the signal amplification mechanism.

[0008] Furthermore, the connector is slidably connected to the displacement adjustment mechanism to adjust the distance between the displacement adjustment mechanism and the fixing mechanism.

[0009] Furthermore, the displacement adjustment mechanism includes a fixed plate and a slide rail. The fixed plate is assembled and fixed with the impactor, and the slide rail is slidably connected with the connecting member.

[0010] Furthermore, the displacement adjustment mechanism also includes a limiting plate, and the slide rail passes through the connecting member and is assembled and fixed with the limiting plate to limit the movement distance of the connecting member along the slide rail direction.

[0011] Furthermore, the fixing mechanism includes, Connect the base and fix it to the base; The support rod is adjustable in length. Its bottom end is assembled and fixed to the connecting base, and its top end is assembled and connected to the signal amplification mechanism through a rotation limiting device that can constrain non-rotational degrees of freedom. The rotation limiting device enables the vertical and horizontal rotation of the signal amplification mechanism.

[0012] Furthermore, the rotation limiting device includes a first limiting structure fixed to the side of the signal amplification mechanism and a second limiting structure fixed to the top of the signal amplification mechanism.

[0013] Furthermore, the signal amplification mechanism is a lever with adjustable length.

[0014] Furthermore, the lever includes a short lever arm and a long lever arm that are assembled and fixed to each other, and the short lever arm is assembled and fixed to the support rod by the rotation limiting device.

[0015] Furthermore, the long lever arm includes a fixed arm integrally formed or assembled and fixed with the short lever arm and a sliding mechanism, wherein the fixed arm is slidably connected to the sliding mechanism.

[0016] Furthermore, one end of the sliding mechanism is slidably connected to the fixed arm and can limit the relative position, while the other end is provided with a mounting platform for assembling and fixing with the device under test.

[0017] In summary, the impact testing equipment provided by this utility model has the following advantages compared with the prior art: By setting up a signal amplification mechanism and a displacement adjustment mechanism, the acceleration generated by the existing impact vibration device is amplified to meet the standard testing requirements and save equipment purchase costs. The overall structure is simple and can be adjusted as needed; After adding a displacement adjustment mechanism and a signal amplification mechanism, the Class 3 impact requirement of IEC61373-2010 is a sinusoidal acceleration of 100g, a pulse width of 6ms, and a maximum displacement of 10.1mm. By adjusting the ratio of the short lever arm to the long lever arm to 1:2, the electric vibration table inputs a 50g acceleration with a pulse width of 6ms and a displacement of 5.05mm. Its terminal can then generate an acceleration of 100g with a pulse width of 6ms and a displacement of 10.1mm for the device under test. The Class 2 impact requirement of IEC61373-2010 is a sinusoidal acceleration of 30g with a pulse width of 18ms and a maximum displacement of 28.1mm. By adjusting the ratio of the short arm to the long arm to 1:2, and inputting a 15g acceleration with a pulse width of 18ms to the end of the electric vibration table, the maximum displacement is 14.05mm. The terminal of the table can then generate an acceleration of 30g with a pulse width of 18ms and a displacement of 28.1mm for the device under test.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0020] In the attached diagram: Figure 1 : A schematic diagram of the overall structure of an impact testing device according to this utility model; Figure 2 This utility model discloses an overall structural diagram of an impact testing device (without an impact vibration device). Figure 3 This utility model discloses a front view of an impact testing device (without an impact vibration device). Figure 4 Top view of an impact testing device (without impact vibration device) according to this utility model. In the picture: 1. Connecting base; 2. Support rod; 3. First limiting structure; 4. Second limiting structure; 5. Fixing plate; 6. Connecting piece; 7. Short lever arm; 8. Long lever arm; 9. Mounting platform; 10. Sliding mechanism.

[0021] It should be noted that the accompanying drawings and text description are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] This utility model provides an impact testing device, including an impact vibration device, a displacement adjustment mechanism assembled and connected to the impactor of the impact vibration device, and a signal amplification mechanism assembled and connected to the device under test. The displacement adjustment mechanism is assembled and connected to the signal amplification mechanism through a connector 6. The fixing mechanism is assembled and fixed at one end to the base of the impact vibration device, and assembled and connected at the other end to the signal amplification mechanism.

[0026] like Figures 1 to 4 As shown, this utility model provides an impact testing device, including an impact vibration device. The impact vibration device has a conventional structure, including a stable base and an impactor that provides impact and vibration energy. It can provide the device under test with a half-sine wave required for the impact test, including but not limited to a predetermined value of sinusoidal acceleration, a predetermined pulse width, and a maximum displacement. The impact vibration device has a conventional structure, and any device that can achieve the same function is applicable, so it will not be described in detail.

[0027] In this embodiment, the impact testing apparatus further includes a displacement adjustment mechanism and a signal amplification mechanism connected by a connector 6. The displacement adjustment mechanism includes a fixing plate 5, the bottom surface of which is assembled and fixed to the table surface of the electric vibration table of the impactor, such as by bolts or adhesive. The impact energy of the impactor can be directly transmitted to the fixing plate 5 through the table surface, receiving the acceleration and displacement generated by the electric vibration table, and then transmitted to the signal amplification mechanism through the connector 6, and finally transmitted to the device under test.

[0028] The connector 6 is generally T-shaped, U-shaped, or an inverted P-shaped structure. In this embodiment, the connector 6 includes a horizontal connecting plate and a vertical connecting plate that are fixed to each other. The horizontal connecting plate is a plate-like structure with a certain thickness, and there are at least two vertical connecting plates, which are fixed to the top of the horizontal connecting plate at intervals. In practical applications, the vertical connecting plate can be a cylindrical or square tube structure, and its bottom is welded to the top surface of the horizontal connecting plate.

[0029] The displacement adjustment mechanism also includes a slide rail and a limiting plate. The transverse connecting plate has through holes or grooves, through which the slide rail passes and slidably connects with the transverse connecting plate. One end of the slide rail passes through the through hole or groove and is inserted into or welded to the fixing plate 5; the other end is inserted into or welded to the limiting plate on the other side of the transverse connecting plate. The relative position of the fixing plate 5 and the transverse connecting plate is adjusted via the slide rail, thereby adjusting the relative position of the fixing plate 5 and the fixed point of the electric vibration table surface with the transverse connecting plate and the fixing mechanism. This achieves adjustment of the maximum displacement during the impact process. In practical applications, the length of the slide rail can be determined according to the requirements of the impact test, thereby limiting the movement distance of the connecting piece 6 along the slide rail direction.

[0030] The top of the vertical connecting plate of connector 6 is assembled and fixed with the signal amplification mechanism, thereby assembling the displacement adjustment mechanism and the signal amplification mechanism into an integrated structure to realize the transmission and amplification of impact energy.

[0031] The signal amplification mechanism is assembled and fixed to the base via a fixing mechanism. The fixing mechanism includes a support rod 2 and a connecting base 1. The support rod 2 is a telescopic rod with an adjustable length, or the length can be quantitatively selected to meet the requirements of vertical and horizontal impact installation.

[0032] The bottom of the support rod 2 is assembled and fixed to the base via the connecting base 1, such as... Figure 1As shown, the connecting base 1 has an L-shaped structure. The vertical arm is assembled and fixed to the side of the support rod 2, and the horizontal arm is assembled and fixed to the base. Multiple connecting bases 1 can be arranged evenly along the outer periphery of the support rod 2. Their vertical arms have the same structure as the support rod 2, and are tightly fitted and then fixed together. Similarly, the horizontal arm has a structure that matches the top surface of the base for easy fixing. In practical applications, the connecting base 1 can also be a flange located at the bottom of the support rod 2, and the flange is bolted to the base.

[0033] A fixed platform with an area larger than the top area of ​​the support rod 2 is set on the top of the support rod 2. The signal amplification mechanism is fixed to the fixed platform through a rotation limiting device, thereby assembling and fixing the signal amplification mechanism, displacement adjustment mechanism and fixing mechanism into an integrated structure.

[0034] In this embodiment, the signal amplification mechanism is a lever with adjustable length. The lever includes a short lever arm 7 and a long lever arm 8, such as... Figures 2 to 4 As shown, the top of the vertical connecting plate is adjacent to the left side of the short lever arm 7 ( Figures 2 to 4 The end assembly is fixed in the indicated direction, thereby assembling and fixing the fixing plate 5 (displacement adjustment mechanism), the connector 6 and the signal amplification mechanism into a vertically connected "Z" shape.

[0035] The right end of the short lever arm 7 is assembled and fixed to the fixed platform via a rotation limiting device. The rotation limiting device includes a first limiting structure 3 and a second limiting structure 4, as shown below. Figure 2 As shown, the first limiting structure 3 includes a fixed seat and a fixed shaft. The fixed seat is L-shaped, with the horizontal part fixed to the top surface of the fixed platform and the vertical part provided with a shaft hole. The side of the short lever arm 7 is provided with a through hole.

[0036] The front and rear sides of the short lever arm 7 ( Figure 2 Each of the following positions is provided with a fixed seat. The fixed shaft passes sequentially through the shaft hole of the front fixed seat, the through hole of the short lever arm 7, and the shaft hole of the rear fixed seat, and is then fixed with bolts. This fixes the side of the short lever arm 7 to the first limiting structure 3. After fixing, there is a space between the bottom surface of the short lever arm 7 and the top surface of the fixed platform. The short lever arm 7 can rotate around the shaft hole in the longitudinal direction to realize the longitudinal rotation of the signal amplification mechanism. The position after rotation is limited by the action of the fixed shaft and the corresponding bolts.

[0037] A longitudinal through hole is also provided at the top of the short lever arm 7, and the second limiting structure 4 is fixed to the top of the short lever arm 7. Specifically, the second limiting structure 4 can be a bolt, which passes downward from the top of the short lever arm 7 through the longitudinal through hole and is threadedly connected to the fixed platform. The short lever arm 7 can rotate horizontally around the second limiting structure 4, realizing the horizontal rotation of the signal amplification mechanism, and the position after rotation is limited by the tight fixing effect of the second limiting structure 4.

[0038] The specific structures of the first limiting structure 3 and the second limiting structure 4 can be determined according to actual needs, and one can be selected to avoid interference during impact. In the case of a vertical impact, only the first limiting mechanism is installed, and the second limiting mechanism is removed. In the case of a horizontal impact, only the second limiting structure 4 is installed, and the first limiting structure 3 is removed. Preferably, the second limiting structure 4 is a bolt, with the bolt head abutting against the top surface of the short lever arm 7. A groove is provided at the lower part of the screw, through which the fixed shaft of the first limiting structure 3 passes, forming a cross structure with the screw, further constraining and limiting the non-rotational degrees of freedom of the signal amplification mechanism.

[0039] Furthermore, the fixed position of the first limiting structure 3 on the fixed platform is adjustable, preferably stepless. For example, the horizontal part of the fixing seat of the first limiting structure 3 is bonded and fixed to the fixed platform. According to the relative positional relationship between the device under test and the impactor, the second limiting structure 4 is loosened, so that the short lever arm 7 rotates around the second limiting structure 4. After the displacement adjustment mechanism is directly above the impactor and the device under test is directly above the end of the long lever arm 8, the second limiting structure 4 is tightened. Then, according to the positional relationship between the fixing plate 5 and the impactor, the position of the signal amplification mechanism is rotated longitudinally, and the first limiting structure 3 is tightened. This realizes the assembly and connection of both sides of the signal amplification mechanism with the impactor and the device under test, respectively, to amplify and transmit the impact energy.

[0040] The long lever arm 8 includes a fixed arm and a sliding mechanism 11. The fixed arm and the short lever arm 7 are integrally formed or assembled and fixed together to form an integral structure. In this embodiment, the fixed arm and the short lever arm 7 are integrally formed. The dividing point between the fixed arm and the short lever arm 7 is the longitudinal plane where the center line of the fixed shaft is located. The left side of the plane is the short lever arm 7, and the right side is the long lever arm 8 (fixed arm).

[0041] The right side of the fixed arm is slidably connected to the sliding mechanism 11, such as... Figure 2 As shown, the sliding mechanism 11 is fitted onto the right side of the fixed arm and can slide along the fixed arm to adjust the overall length of the long lever arm 8. Its sliding connection can employ existing conventional technology without limitation, as long as it enables sliding and defines the relative positional relationship.

[0042] A mounting platform 10 is fixed on the top surface of the right end of the sliding mechanism 11. The device under test (DUT) is assembled and fixed to the mounting platform 10. The impact energy of the impactor, such as acceleration and pulse width, transmitted by the displacement adjustment mechanism, connector 6, short lever arm 7, and long lever arm 8, is applied to the DUT through the mounting platform 10. Depending on the specific structure of the DUT, the position and fixing structure of the DUT can be set to associate with the mounting platform 10, receive the transmitted impact energy, and complete the impact test. This is not the purpose of this invention and will not be elaborated further.

[0043] The impact energy generated by the impactor, such as the acceleration, pulse width, and maximum displacement of a half-sine wave, is transmitted to the connecting member 6 via the fixed plate 5, and then to the signal amplification mechanism. The impact signal changes during the longitudinal transmission through the fixed plate 5 and connecting member 6, and is amplified during the lateral transmission through the signal amplification mechanism. During the transmission through the signal amplification mechanism, the original impact energy generated by the impactor is amplified. By adjusting the ratio of the short lever arm 7 to the long lever arm 8, the magnitude of the impact energy at the mounting platform 10 can be determined, such as: The Class 3 impact requirements of IEC61373-2010 are a sinusoidal acceleration of 100g, a pulse width of 6ms, and a maximum displacement of 10.1mm. By adjusting the ratio of the short arm 7 and the long arm 8 to 1:2, and inputting a 50g acceleration with a pulse width of 6ms to the end of the electric vibration table, the displacement is 5.05mm. The terminal of the table can then generate an acceleration of 100g with a pulse width of 6ms and a displacement of 10.1mm for the device under test. The Class 2 impact requirement of IEC61373-2010 is a sinusoidal acceleration of 30g with a pulse width of 18ms and a maximum displacement of 28.1mm. By adjusting the ratio of the short arm 7 and the long arm 8 to 1:2, and inputting a 15g acceleration with a pulse width of 18ms to the end of the electric vibration table, the maximum displacement is 14.05mm. The terminal of the table can then generate an acceleration of 30g with a pulse width of 18ms and a displacement of 28.1mm for the device under test.

[0044] In this application, the signal amplification mechanism, connector 6, and fixing plate 5 are made of the same material, such as aluminum-magnesium alloy, to ensure they have the same conductivity characteristics. Furthermore, this material has high stiffness, low density, and light weight. In summary, the impact testing equipment provided by this utility model has the following advantages compared to the prior art: By setting up a signal amplification mechanism and a displacement adjustment mechanism, the acceleration generated by the existing impact vibration device is amplified to meet the standard testing requirements and save equipment purchase costs. The overall structure is simple and can be adjusted as needed.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An impact testing apparatus, comprising an impact vibration device, characterized in that: It also includes a displacement adjustment mechanism assembled and connected to the impactor of the impact vibration device and a signal amplification mechanism assembled and connected to the device under test, wherein the displacement adjustment mechanism is assembled and connected to the signal amplification mechanism via a connector; The fixing mechanism is assembled and fixed at one end to the base of the impact vibration device, and assembled and connected at the other end to the signal amplification mechanism.

2. The impact testing equipment as described in claim 1, characterized in that: The connector is slidably connected to the displacement adjustment mechanism to adjust the distance between the displacement adjustment mechanism and the fixing mechanism.

3. The impact testing equipment as described in claim 2, characterized in that: The displacement adjustment mechanism includes a fixed plate and a slide rail. The fixed plate is assembled and fixed with the impactor, and the slide rail is slidably connected with the connecting member.

4. The impact testing equipment as described in claim 3, characterized in that: The displacement adjustment mechanism also includes a limiting plate. After the slide rail passes through the connector, it is assembled and fixed with the limiting plate, limiting the movement distance of the connector along the slide rail direction.

5. An impact testing apparatus as described in any one of claims 1 to 4, characterized in that: The fixing mechanism includes, Connect the base and fix it to the base platform; The support rod is adjustable in length. Its bottom end is assembled and fixed to the connecting base, and its top end is assembled and connected to the signal amplification mechanism through a rotation limiting device that can constrain non-rotational degrees of freedom. The rotation limiting device enables the vertical and horizontal rotation of the signal amplification mechanism.

6. The impact testing equipment as described in claim 5, characterized in that: The rotation limiting device includes a first limiting structure fixed to the side of the signal amplification mechanism and a second limiting structure fixed to the top of the signal amplification mechanism.

7. The impact testing equipment as described in claim 5, characterized in that: The signal amplification mechanism is a lever with adjustable length.

8. The impact testing equipment as described in claim 7, characterized in that: The lever includes a short lever arm and a long lever arm that are assembled and fixed to each other. The short lever arm is assembled and fixed to the support rod by the rotation limiting device.

9. The impact testing equipment as described in claim 8, characterized in that: The long lever arm includes a fixed arm and a sliding mechanism that are integrally formed or assembled with the short lever arm, and the fixed arm is slidably connected to the sliding mechanism.

10. The impact testing equipment as described in claim 9, characterized in that: One end of the sliding mechanism is slidably connected to the fixed arm and can limit the relative position, while the other end is provided with a mounting platform for assembly and fixation with the device under test.

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