Testing device

Abstract

The utility model discloses a testing device which is used for testing the dynamic performance of an energy absorption block, the testing device comprises a base, an ejection unit and a collision unit, the ejection unit is arranged on the base, the ejection unit comprises a sliding rail and an ejection block, the sliding rail extends along the first direction of the base, and the ejection block is arranged on the sliding rail in a sliding mode; the collision unit is arranged on the ejection block and provided with a pressure sensor module and an acceleration sensor module, the pressure sensor module is used for recording the impact force generated when the collision unit collides with the energy absorption block in real time, and the acceleration sensor module is used for recording the acceleration generated when the collision unit collides with the energy absorption block in real time. Through the testing device, the dynamic performance and the mass of the energy absorption block can be confirmed before a pedestrian protection test, the number of invalid tests in the later period is reduced, the replacement frequency of the front end structure of the vehicle is reduced, and the test cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of pedestrian protection, in particular to a testing device. Background Art

[0002] When a car is subjected to a collision test, it will undergo multiple collision tests such as frontal collision, side collision, rear neck collision, pedestrian protection, etc. The pedestrian protection test device is used to evaluate the front-end structure of the entire vehicle. However, when the injury in the leg test exceeds the standard, the existing pedestrian protection test device usually adjusts the energy absorption block and then re-implements the pedestrian protection test. This requires re-ordering parts and replacing the front-end structure of the vehicle, which is costly.

[0003] Therefore, it is necessary to provide a new testing device to solve the above technical problems. Utility Model Content

[0004] The main purpose of the utility model is to provide a testing device, aiming to solve the problem of high testing cost in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes a testing device for testing the dynamic performance of the energy absorbing block, and the testing device comprises:

[0006] Pedestal;

[0007] An ejection unit, the ejection unit is arranged on the base, the ejection unit comprises a slide rail and an ejection block, the slide rail extends along a first direction of the base, and the ejection block is slidably arranged on the slide rail;

[0008] A collision unit, wherein the collision unit is arranged on the ejection block, and the collision unit is provided with a pressure sensor module and an acceleration sensor module, wherein the pressure sensor module is used to record in real time the impact force when the collision unit hits the energy absorbing block, and the acceleration sensor module is used to record in real time the acceleration when the collision unit hits the energy absorbing block.

[0009] In one embodiment, the collision unit includes a base and an impact block, the base is connected to the ejection block, the impact block is arranged on a side of the base away from the ejection block, the pressure sensor module is connected to the base and the impact block, and the acceleration sensor module is arranged on the impact block.

[0010] In one embodiment, the number of the pressure sensor modules is two, and the two pressure sensor modules are arranged at an interval, and both of the two pressure sensor modules are connected to the base and the impact block.

[0011] In one embodiment, a curved surface is provided on a side of the impact block away from the base.

[0012] In one embodiment, the ejection unit further includes a driving member, the slide rail is disposed on the driving member, the ejection block is connected to the driving member, and the driving member can drive the ejection block to slide along the slide rail.

[0013] In one embodiment, the slide rail forms a guide block extending along the first direction, and the ejection block is provided with a roller, and the roller is slidably connected to the guide block.

[0014] In one embodiment, the guide block forms a positioning protrusion, and the roller is provided with a positioning groove that cooperates with the positioning protrusion.

[0015] In one embodiment, the number of the rollers is four, and the rollers are slidably arranged in groups of two on both sides of the guide block.

[0016] In one embodiment, the number of the slide rails is two, the two slide rails are spaced apart from each other on the driving member, and the two sides of the ejection block are respectively slidably connected to the two slide rails.

[0017] In one embodiment, the base is provided with a mounting frame which slides along the second direction of the base, and the ejection unit is slidably disposed on the mounting frame along the third direction of the base.

[0018] In the technical solution of the utility model, the ejection block is slidably arranged on the slide rail, and is used to drive the collision unit installed on the ejection block to move, so that the collision unit hits the energy absorbing block on the vehicle; the pressure sensor module is used to record the impact force when the collision unit hits the energy absorbing block in real time, and convert it into an impact force-time curve and transmit it to an external electronic device; the acceleration sensor module is used to record the acceleration when the collision unit hits the energy absorbing block in real time, and convert it into an acceleration-time curve and transmit it to an external electronic device. After receiving the acceleration-time curve, the external electronic device performs two integral conversions to obtain a displacement-time curve, and integrates the impact force-time curve and the displacement-time curve to convert it into an impact force-displacement curve. By observing the impact force-displacement curve at different impact speeds, the dynamic performance and quality of the energy absorbing block can be confirmed. Through this test device, the dynamic performance and quality of the energy absorbing block can be confirmed before the pedestrian protection test, reducing the number of invalid tests in the later stage, reducing the replacement frequency of the front-end structure of the vehicle, and saving the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of the testing device in the embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the connection between the slide rail and the ejection block in the embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the collision unit in the embodiment of the utility model.

[0023] Description of Figure Numbers:

[0024] Label name Label name 100 Base 110 Mounting bracket 200 Ejection unit 210 Slide rails 211 Guide block 212 Positioning protrusion 220 Ejection Block 221 Scroll Wheel 222 Positioning groove 230 Drive parts 300 Collision Unit 310 Pressure sensor module 320 Acceleration sensor module 330 Base 340 Impact block 341 Curved

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The utility model provides a testing device, aiming to solve the problem of high testing cost in the prior art.

[0032] like Figure 1 As shown, a test device is used to test the dynamic performance of an energy absorbing block. The test device includes a base 100, an ejection unit 200 and a collision unit 300. The ejection unit 200 is arranged on the base 100. The ejection unit 200 includes a slide rail 210 and an ejection block 220. The slide rail 210 extends along a first direction of the base 100, and the ejection block 220 is slidably arranged on the slide rail 210; the collision unit 300 is arranged on the ejection block 220, and the collision unit 300 is provided with a pressure sensor module 310 and an acceleration sensor module 320. The pressure sensor module 310 is used to record the impact force when the collision unit 300 hits the energy absorbing block in real time, and the acceleration sensor module 320 is used to record the acceleration when the collision unit 300 hits the energy absorbing block in real time. The first direction is Figure 1 The direction indicated by X.

[0033] In the embodiment of the utility model, the ejection block 220 is slidably arranged on the slide rail 210, and is used to drive the collision unit 300 installed on the ejection block 220 to move, so that the collision unit 300 hits the energy absorbing block on the vehicle; the pressure sensor module 310 is used to record the impact force when the collision unit 300 hits the energy absorbing block in real time, and convert it into an impact force-time curve to be transmitted to the external electronic device; the acceleration sensor module 320 is used to record the acceleration when the collision unit 300 hits the energy absorbing block in real time, and convert it into an acceleration-time curve to be transmitted to the external electronic device. After receiving the acceleration-time curve, the external electronic device performs two integral conversions to obtain a displacement-time curve, and integrates the impact force-time curve and the displacement-time curve to convert it into an impact force-displacement curve. By observing the impact force-displacement curve at different impact speeds, the dynamic performance and quality of the energy absorbing block can be confirmed. Through the test device, the dynamic performance and quality of the energy absorbing block can be confirmed before the pedestrian protection test, the number of invalid tests in the later stage can be reduced, the replacement frequency of the front-end structure of the vehicle can be reduced, and the test cost can be saved.

[0034] It should be noted that the acceleration-time curve mentioned above is converted into a displacement-time curve through two integration conversions. Specifically, after the external electronic device receives the acceleration-time curve, it is converted into a velocity-time curve through the first integration conversion, and then the displacement-time curve is converted into the second integration conversion.

[0035] like Figure 1 As shown, the ejection unit 200 further includes a driving member 230, the slide rail 210 is arranged on the driving member 230, the ejection block 220 is connected to the driving member 230, and the driving member 230 can drive the ejection block 220 to slide along the slide rail 210. The driving member 230 can drive the ejection block 220 to slide along the slide rail 210, and then drive the collision unit 300 installed on the ejection block 220 to impact the energy absorbing block, so as to complete the dynamic performance test process of the energy absorbing block; in this embodiment, the driving member 230 drives the ejection block 220 to slide along the slide rail 210 by hydraulic drive or pneumatic drive, and its specific structure can refer to the pneumatic ejection device or hydraulic ejection device in the prior art.

[0036] like Figure 1 As shown, the slide rail 210 forms a guide block 211 extending along the first direction, and the ejection block 220 is provided with a roller 221, which is slidably connected to the guide block 211. The roller 221 on the ejection block 220 is slidably connected to the guide block 211 formed on the slide rail 210, and the guide block 211 can provide guidance for the ejection block 220 to slide along the slide rail 210, and the ejection block 220 is slidably connected to the guide block 211 through the roller 221, which can reduce the friction force when the ejection block 220 slides along the slide rail 210, and reduce the power loss of the ejection block 220.

[0037] like Figure 1 As shown, the guide block 211 forms a positioning protrusion 212, and the roller 221 is provided with a positioning groove 222 that cooperates with the positioning protrusion 212. The roller 221 and the guide block 211 cooperate with each other through the positioning protrusion 212 and the positioning groove 222. On the one hand, the roller 221 can be positioned to ensure the position accuracy of the ejection block 220 when sliding on the slide rail 210, and on the other hand, the roller 221 can be limited to prevent the ejection block 220 from slipping off the slide rail 210. In this embodiment, the positioning groove 222 is provided on the outer circumferential surface of the roller 221.

[0038] like Figure 1 and Figure 2 As shown, there are four rollers 221, and the rollers 221 are slidably disposed in groups of two on both sides of the guide block 211. The four rollers 221 are slidably disposed in groups of two on both sides of the guide block 211, so that the four rollers 221 can clamp the guide block 211 from both sides of the guide block 211 to ensure the stability of the ejection block 220 when sliding along the slide rail 210.

[0039] like Figure 1 and Figure 2 As shown, there are two slide rails 210, which are spaced apart from each other on the driving member 230, and both sides of the ejection block 220 are slidably connected to the two slide rails 210. The two slide rails 210 can provide guides for both sides of the ejection block 220 at the same time to ensure the stability of the ejection block 220 when sliding along the slide rails 210.

[0040] like Figure 1 and Figure 3 As shown, the collision unit 300 includes a base 330 and a collision block 340, the base 330 is connected to the ejection block 220, the collision block 340 is arranged on the side of the base 330 away from the ejection block 220, the pressure sensor module 310 connects the base 330 and the collision block 340, and the acceleration sensor module 320 is arranged on the collision block 340. By connecting the base 330 and the collision block 340 by the pressure sensor module 310, on the one hand, when the collision unit 300 hits the energy absorption block, the impact force received by the collision block 340 can be more directly transmitted to the pressure sensor module 310, ensuring the accuracy of the data recorded by the pressure sensor module 310, and on the other hand, it can simplify the structure of the collision unit 300 and reduce the difficulty of manufacturing and assembling the test device. In this embodiment, the number of the acceleration sensor modules 320 is two, and the two acceleration sensor modules 320 are both arranged in the middle of the collision block 340.

[0041] like Figure 3As shown, there are two pressure sensor modules 310, and the two pressure sensor modules 310 are arranged at intervals, and the two pressure sensor modules 310 are connected to the base 330 and the impact block 340. By connecting the base 330 and the impact block 340 with two pressure sensor modules 310, the structure of the collision unit 300 can be made more reliable, and the two pressure sensor modules 310 simultaneously measure the impact force of the collision unit 300 hitting the energy absorbing block, which can further ensure the accuracy of the data.

[0042] like Figure 3 As shown, a side of the impact block 340 away from the base 330 is provided with an arc surface 341. When the collision unit 300 impacts the energy absorbing block, the impact block 340 impacts the energy absorbing block with the arc surface 341, which can make the collision unit 300 have a better impact effect when impacting the energy absorbing block, and can also effectively avoid the impact block 340 from being damaged due to the collision. In this embodiment, the arc surface 341 can be a circular arc surface or a curved surface.

[0043] like Figure 1 As shown, the base 100 is provided with a mounting frame 110 that slides along the second direction of the base 100, and the ejection unit 200 is slidably disposed on the mounting frame 110 along the third direction of the base 100. The second direction is Figure 1 The direction indicated by Y, the third direction is Figure 1 The mounting frame 110 is slidably mounted on the base 100 along the second direction, and the ejection unit 200 is slidably mounted on the mounting frame 110 along the third direction, which enables the tester to adjust the position of the ejection unit 200 in the second and third directions of the base 100 according to actual needs, so as to ensure that the collision unit 300 mounted on the ejection block 220 is aligned with the energy absorbing block to be tested when testing the dynamic performance of the energy absorbing block. In this embodiment, the vehicle corresponding to the energy absorbing block tested by the test device is used as a reference, the first direction is the front-to-back direction of the vehicle, the second direction is the left-to-right direction of the vehicle, and the third direction is the vertical direction of the vehicle.

[0044] The process of using the test device to test the dynamic performance of the energy absorbing block is as follows: by adjusting the position of the mounting frame 110 in the second direction of the base 100 and the position of the ejection unit 200 in the third direction of the base 100, the collision mechanism is aligned with the energy absorbing block located on the upper part of the vehicle or the energy absorbing block located on the lower part of the vehicle, and the driving member 230 drives the ejection block 220 to slide along the slide rail 210 at different impact speeds according to a preset thrust, thereby driving the collision unit 300 to move and impact the energy absorbing block; when the collision unit 300 impacts the energy absorbing block, the pressure sensor module 310 records the collision unit 300 in real time. The impact force when the collision unit 300 hits the energy absorbing block is converted into an impact force-time curve and transmitted to the external electronic device. The acceleration sensor module 320 records the acceleration when the collision unit 300 hits the energy absorbing block in real time, and converts it into an acceleration-time curve and transmits it to the external electronic device. After receiving the acceleration-time curve, the external electronic device performs two integral conversions to obtain a displacement-time curve, and integrates the impact force-time curve and the displacement-time curve to convert them into an impact force-displacement curve. By observing the impact force-displacement curves at different impact speeds, the dynamic performance and quality of the energy absorbing block can be confirmed.

[0045] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A testing device for testing the dynamic performance of an energy absorbing block, characterized in that: The testing device comprises: Pedestal; An ejection unit, the ejection unit is arranged on the base, the ejection unit comprises a slide rail and an ejection block, the slide rail extends along a first direction of the base, and the ejection block is slidably arranged on the slide rail; A collision unit, wherein the collision unit is arranged on the ejection block, and the collision unit is provided with a pressure sensor module and an acceleration sensor module, wherein the pressure sensor module is used to record in real time the impact force when the collision unit hits the energy absorbing block, and the acceleration sensor module is used to record in real time the acceleration when the collision unit hits the energy absorbing block.

2. The testing device according to claim 1, characterized in that: The collision unit includes a base and an impact block, the base is connected to the ejection block, the impact block is arranged on a side of the base away from the ejection block, the pressure sensor module is connected to the base and the impact block, and the acceleration sensor module is arranged on the impact block.

3. The testing device according to claim 2, characterized in that: There are two pressure sensor modules, and the two pressure sensor modules are arranged at an interval, and both of the two pressure sensor modules are connected to the base and the impact block.

4. The testing device according to claim 2, characterized in that: A side of the impact block away from the base is provided with a curved surface.

5. The testing device according to claim 1, characterized in that: The ejection unit further comprises a driving member, the slide rail is arranged on the driving member, the ejection block is connected to the driving member, and the driving member can drive the ejection block to slide along the slide rail.

6. The testing device according to claim 5, characterized in that: The slide rail forms a guide block extending along the first direction, and the ejection block is provided with a roller, and the roller is slidably connected to the guide block.

7. The testing device according to claim 6, characterized in that: The guide block forms a positioning protrusion, and the roller is provided with a positioning groove matched with the positioning protrusion.

8. The testing device according to claim 6, characterized in that: The number of the rollers is four, and the rollers are slidably arranged in groups of two on both sides of the guide block.

9. The testing device according to claim 5, characterized in that: The number of the slide rails is two, the two slide rails are spaced apart from each other on the driving member, and the two sides of the ejection block are respectively slidably connected to the two slide rails.

10. The testing device according to any one of claims 1 to 9, characterized in that: The base is provided with a mounting frame which slides along the second direction of the base, and the ejection unit is slidably arranged on the mounting frame along the third direction of the base.

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