A servo separable inertia-based sustained speed collision test device

Abstract

The utility model discloses a kind of inertia-based inertia holding speed collision test device with follow-up separable, including bearing support, driving device, pushing device, separable bearing platform, initiative deceleration mechanism, impact platform and control module, the pushing device is located in the rear of separable bearing platform, the pushing device includes adjustable pushing part and lower pushing part, the lower pushing part is contacted with the support plate of separable bearing platform, the adjustable pushing part can be contacted with the sample to be measured on support plate, so that the sample to be measured and separable bearing platform can keep relative static before collision;Pushing device, separable bearing platform can slide back and forth on bearing support along slide rail, the front of bearing support is provided with position sensor, the position when collision occurs can be detected and the actual speed of sample to be measured before impact is acquired, and it can be compared with the set speed value of driving motor, to further calibrate driving speed, improve the reliability of test result.

Description

Technical Field

[0001] This utility model relates to the field of collision testing, and in particular to a follow-up separable collision test device based on inertial sustained velocity. Background Technology

[0002] According to national standards GB 6675.2-2025, GB / T 14749-2025, and GB 6675.12-2014, in the dynamic strength and collision test of wheeled toys, toy scooters, baby walkers, and other products, the tested sample bears a specified load and impacts a non-elastic step or plywood at a specified speed. After the impact, the tested sample must still meet the requirements of other clauses of the standard. The purpose is to protect the personal safety of children to the greatest extent and prevent accidental injuries caused by product structural failure. It is a very important test item in the standard.

[0003] As disclosed in application number 201621490828.0, the automated collision testing equipment for strollers in existing collision tests, in order to prevent the stroller from falling off the mounting seat due to inertia during acceleration, places the stroller between two supports and fixes it to the supports using other connecting parts. During the collision, the mounting seat and the stroller on it continue to slide and detach from the mounting plate due to inertia, causing the stroller to hit the impact block. During the impact, the mounting seat and the stroller are impacted together, affecting the accuracy of the impact results.

[0004] Furthermore, the determination of the velocity of the sample before the collision usually relies on the output command of the motor or the feedback speed of the encoder, lacking independent verification and failing to provide objective evidence that the sample collided at a preset speed at the moment the collision occurred. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a follow-up separable collision test device based on inertial sustained velocity.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a follow-up separable inertial sustained-velocity collision test device, comprising a support bracket, a drive device, a push device, a separable support platform, an active deceleration mechanism, an impact platform, and a control module. The drive device drives the push device to move. The push device is located behind the separable support platform. The push device includes an adjustable push part and a lower push part. Slide rails are provided on the left and right sides of the support bracket. The push device and the separable support platform are connected to the support bracket rails. At least three position sensors are provided at the front of the support bracket. The active deceleration mechanism and the impact platform are located on the support bracket in front of the position sensors.

[0007] Furthermore, the adjustable pushing part includes a pushing frame, pushing vertical rods, and pushing horizontal rods. The pushing frame is installed above the lower pushing part. Two pushing vertical rods are longitudinally arranged inside the pushing frame. Connecting members are horizontally arranged on the pushing vertical rods. A first locking member is provided on the connecting member and connected to the pushing vertical rod. A second locking member is also provided on the connecting member. Two pushing horizontal rods pass through the second locking member laterally. Push plates are provided at the ends of the two pushing horizontal rods near the separable bearing platform.

[0008] Furthermore, the first locking member is threadedly connected to the connecting member, and the first locking member has a vertical rod through-hole in the middle. A first adjustment notch is provided on one side of the vertical rod through-hole, and the two sides of the first adjustment notch extend outward to form a first clamping part. A first clamping hole is coaxially provided on the two first clamping parts.

[0009] Furthermore, the second locking member is provided with mounting parts at both the upper and lower ends. The second locking member is connected to the connector through screw holes provided on the mounting parts. The second locking member is provided with a crossbar through-hole in the middle. A second adjustment notch is provided on one side of the crossbar through-hole. The upper and lower sides of the second adjustment notch extend outward to form a second clamping part. A second clamping hole is provided coaxially on the two clamping parts.

[0010] Furthermore, at least three position sensors are arranged at equal intervals. The second position sensor, which passes through the separable carrier platform, is used to control the push device to actively decelerate. The equally spaced position sensors are used to obtain the actual speed of the separable carrier platform before impact and can also be used to calibrate the drive speed.

[0011] Furthermore, the drive device includes a drive motor, drive chains, drive wheels, and driven wheels. There are two drive wheels, located on the left and right sides of the support bracket, respectively. A drive shaft is provided between the two drive wheels, and the drive shaft is coaxially connected to the output shaft of the drive motor. There are also two driven wheels, located on the left and right sides of the support bracket, respectively. A driven shaft is provided between the two driven wheels. There are two drive chains, one connecting the drive wheel and the driven wheel on the left, and the other connecting the drive wheel and the driven wheel on the right. The two sides of the downward pushing part are fixedly connected to the two drive chains.

[0012] Furthermore, the detachable bearing platform includes a support plate for placing the sample to be tested, and a weight holder is provided on the support plate, with a weight attached to the weight holder by a hanging rope.

[0013] Furthermore, the active deceleration mechanism includes a deceleration plate located between the impact platform and the support plate. The top surface of the deceleration plate is higher than the bottom surface of the support plate, but the top surface of the deceleration plate is not higher than the upper surface of the support plate.

[0014] Furthermore, a limit sensor is provided on the rear side of the support bracket.

[0015] This utility model includes at least one of the following beneficial effects: 1. An adjustable pushing part is provided on the pushing device, which can adjust the push plate to contact the sample to be tested, so that the sample to be tested and the separable bearing platform remain stationary relative to each other throughout the acceleration process, thus solving the problem of the sample tilting or even falling over before impact during the acceleration process. Magnetic fixing columns can be set on both sides of the sample along the direction of movement to help the sample maintain its orientation. After the separable bearing platform is intercepted by the deceleration plate, the sample to be tested can detach from the separable bearing platform and independently contact the impact table for impact testing. 2. By setting multiple position sensors at the front of the support bracket, the speed of the separable support platform can be accurately calibrated. The drive device drives the separable support platform from the starting position to accelerate to the set speed and drives it to maintain the preset speed between the first position sensor and the second position sensor. After passing the second sensor, the separable support platform enters the inertial sliding stage. When the actual speed between the first and second position sensors and the actual speed between the second and third position sensors are very close to the set speed, it can be indicated that the entire separable support platform impacts the baffle at a nearly uniform speed at the set speed. This solves the problem that in the past, when two sensors were used, only the average speed could be calculated, and it was impossible to verify whether the actual movement was close to uniform. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0017] Figure 2 This is a schematic diagram of the support structure.

[0018] Figure 3 for Figure 1 A schematic diagram of part A in the diagram.

[0019] In the diagram: 1. Support bracket; 11. Slide rail; 2. Pushing device; 21. Lower pushing part; 22. Adjustable pushing part; 23. Pushing frame; 24. Pushing vertical rod; 25. Connecting piece; 26. Pushing horizontal rod; 27. Push plate; 28. Second locking piece; 281. Horizontal rod opening; 282. Clamping part; 283. Clamping hole; 284. Mounting part; 285. Second adjustment notch; 29. ​​First locking piece; 291. Vertical rod opening; 292. First adjustment notch; 293. First clamping part; 3. Separable support platform; 31. Support plate; 321. Hanging rope; 322. Weight; 4. Active deceleration mechanism; 41. Deceleration plate; 5. Impact platform; 61. Drive motor; 62. Drive wheel; 63. Driven wheel; 64. Drive shaft; 65. Driven shaft; 66. Drive chain; 7. Position sensor; 8. Limit sensor. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Example: A separable, inertial-based, sustained-velocity collision test device includes a support bracket 1, a drive device, a pushing device 2, a separable support platform 3, an active deceleration mechanism 4, an impact platform 5, and a control module. The drive device drives the pushing device 2 to move. The pushing device 2 is located behind the separable support platform 3. The pushing device 2 includes an adjustable pushing part 22 and a lower pushing part 21. The lower pushing part 21 contacts the support plate 31 of the separable support platform 3. The adjustable pushing part 21 can contact the sample to be tested on the support plate 31, so that the sample to be tested and the separable support platform 3 are in contact before the collision. The separation support platform 3 can remain relatively stationary and will not affect the separation of the sample to be tested from the separation support platform 3 during impact; the support bracket 1 is provided with slide rails 11 on the left and right sides, the pushing device 2 and the separation support platform 3 are connected to the track of the support bracket 1, the pushing device 2 and the separation support platform 3 can slide back and forth on the support bracket 1 along the slide rail 11, at least three position sensors 7 are provided at the front of the support bracket 1, which can obtain the actual speed of the sample to be tested before impact, and the active deceleration mechanism and the impact platform 5 are provided on the support bracket 1 in front of the position sensors 7.

[0022] Furthermore, the adjustable pushing part includes a pushing frame 23, pushing vertical rods 24, and pushing horizontal rods 26. The pushing frame 23 is installed above the lower pushing part 21. The two pushing vertical rods 24 are longitudinally arranged inside the pushing frame 23. A connecting member 25 is horizontally arranged on the pushing vertical rods 24. A first locking member 29 is provided on the connecting member 25 and connected to the pushing vertical rod 24. The connecting member 25 is also provided with a second locking member 28. The two pushing horizontal rods 26 pass laterally through the second locking member 28. A push plate 27 is provided at one end of the two pushing horizontal rods 26 near the separable bearing platform. The height of the push plate 27 can be adjusted by the first locking member 29, and the contact between the push plate 27 and the sample to be tested can be adjusted by the second locking member 28.

[0023] Furthermore, the first locking member 29 is threadedly connected to the connecting member 25. The first locking member 29 has a vertical rod through-hole 291 in the middle. A first adjustment notch 292 is provided on one side of the vertical rod through-hole 291. The first adjustment notch 292 extends outward on both sides to form a first clamping part 293. A first clamping hole (not shown in the figure, but the principle is the same as the second locking hole) is coaxially provided on the two first clamping parts 293. After determining the required height, a screw is passed through the two first clamping holes, and then a nut is tightened to make the first locking member 29 clamp the pushing vertical rod 24.

[0024] Furthermore, the second locking member 28 is provided with mounting portions 284 at both the upper and lower ends. The second locking member 28 is connected to the connector 25 through the screw holes provided on the mounting portions 284. The second locking member 28 is provided with a crossbar through-hole 281 in the middle. A second adjustment notch 285 is provided on one side of the crossbar through-hole 281. The upper and lower sides of the second adjustment notch 285 extend outward to form a second clamping portion 282. A second clamping hole 283 is coaxially provided on the two clamping portions 282. After the push plate 27 contacts the sample to be tested, a screw is passed through the two second clamping holes 283, and then a nut is tightened to make the second locking member clamp the crossbar.

[0025] Furthermore, at least three position sensors 7 are arranged at equal intervals. The second position sensor 7, which the separable support platform 3 passes through, is used to control the deceleration of the separable support platform 3. After the separable support platform 3 passes the second position sensor, it feeds back a signal to the control module. The control module controls the pushing device 2 to decelerate through the drive device. The separable support platform 3 and the sample under test detach from the pushing device 2 under inertia and continue to move forward by maintaining speed due to inertia. The spacing of the position sensors 3 is fixed, i.e., the distance is known. Based on the time it takes for the separable support platform to reach the next position sensor, the control module can calculate the actual speed of the separable support platform 3 and the sample under test between the first and second position sensors and the actual speed between the second and third position sensors. The speeds of the two are very close to the set speed, which indicates that the separable support platform 3 as a whole impacts the baffle at a nearly uniform speed at the set speed, so as to ensure the reliability of the collision result. The calculated speed can be compared with the set speed value of the drive motor 61, and then used to correct the coefficient of the encoder connected to the output shaft and calibrate the speed of the drive device.

[0026] Furthermore, the driving device includes a drive motor 61, a drive chain 66, a drive wheel 62, and a driven wheel 63. There are two drive wheels 62, located on the left and right sides of the support bracket 1, respectively. A drive shaft 64 is provided between the two drive wheels, and the drive shaft 64 is coaxially connected to the output shaft of the drive motor 61. There are two driven wheels 63, located on the left and right sides of the support bracket 1, respectively. A driven shaft 65 is provided between the two driven wheels 63. A bearing seat can be provided on the support bracket 1 to install the drive shaft 64 and the driven shaft 65. There are two drive chains 66. One drive chain 66 connects the drive wheel 62 and the driven wheel 63 on the left side, and the other drive chain 66 connects the drive wheel 62 and the driven wheel 63 on the right side. The two sides of the lower pushing part 21 are fixedly connected to the two drive chains 66. The drive motor 61 controls the rotation of the drive wheel 62, thereby driving the pushing device 2 to move through the drive chain 66. The pushing device 2 pushes the separable support platform 3 and the sample to be tested forward.

[0027] Furthermore, the detachable bearing platform 3 includes a support plate 31, which is used to place the sample to be tested. A weight bracket 32 ​​is fixed on the support plate 31. A weight 322 can be attached to the weight bracket 32 ​​by a hanging rope 321. The weight 322 provides the load required for the test. The hanging rope 321 can prevent the weight 322 from tipping over or flying off during impact. A tensioner can be set on the weight bracket 3 to adjust the length of the hanging rope 321.

[0028] Furthermore, the active deceleration mechanism 4 includes a deceleration plate 41, which is located between the impact platform 5 and the support plate 31. The top surface of the deceleration plate 41 is higher than the bottom surface of the support plate 31, but the top surface of the deceleration plate 41 is not higher than the upper surface of the support plate 31. When the separable bearing platform 3 collides with the deceleration plate 41, the deceleration plate 41 will not contact the sample to be tested above the support plate 31, so that the sample to be tested can be smoothly separated from the support plate 31. In this embodiment, the active deceleration mechanism 4 is a pneumatic buffer.

[0029] Furthermore, a limit sensor 8 is provided on the rear side of the support bracket 1. After the test is completed, the drive motor 61 rotates in the opposite direction, causing the pushing device 2 to move backward until the limit sensor 8 senses the pushing device 2 and sends feedback to the control module. The control module then controls the drive device to stop running.

[0030] In this embodiment, the sample to be tested is a baby walker, and the impact platform is made of wood. Of course, the application of this testing device is not limited to this; it can also be used to test other items, as long as the appropriate impact plate is selected for the impact platform according to the testing requirements.

[0031] The testing process in this embodiment is as follows: The deceleration plate 41 is extended under pressure, and the separating support platform 3 contacts the deceleration plate 41. The walker is placed on the separating support platform 3, and the front impact part of the walker contacts the impact table 5. Magnetic fixing posts can be placed on the left and right sides of the walker. These magnetic fixing posts do not restrict the walker's forward and backward movement. The pushing part 21 of the pushing device 2 contacts the support plate 31 of the separating support platform 3. The connecting piece 25 and the pushing crossbar 26 are adjusted so that the pushing plate 27 contacts the back of the walker. The first and second locking pieces are locked, so that the sample to be tested remains relatively stationary with the separating support platform 3 before the collision. The pushing device 2 and the separating support platform... 3. Reverse to the starting position; the test begins. The drive device is activated through the control module. The drive device drives the push device 2 to push the detachable support platform 3 and the walker forward at a preset speed. When the detachable support platform 3 passes the second position sensor 7, the control module decelerates the push device 2 through the drive device. The detachable support platform 3 and the walker continue to move forward under the action of inertia, and the actual speed is calculated by the position sensor 7. The detachable support platform 3 and the walker move forward until the detachable support platform is intercepted by the active deceleration mechanism 4. The walker detaches from the detachable support platform 3 under the action of inertia and crashes into the impact platform alone, completing the impact test.

[0032] The above description only details the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. A servo-separable collision test device based on inertial sustained velocity, characterized in that... The device includes a support frame, a drive unit, a push unit, a detachable support platform, an active deceleration mechanism, an impact platform, and a control module. The drive unit drives the push unit to move. The push unit is located behind the detachable support platform and includes an adjustable push part and a lower push part. The support frame has slide rails on its left and right sides. The push unit and the detachable support platform are connected to the support frame tracks. At least three position sensors are provided at the front of the support frame. The active deceleration mechanism and the impact platform are located on the support frame in front of the position sensors.

2. The follower-separable collision test device based on inertial sustained velocity according to claim 1, characterized in that... The adjustable pushing part includes a pushing frame, pushing vertical rods, and pushing horizontal rods. The pushing frame is installed above the lower pushing part. Two pushing vertical rods are longitudinally arranged inside the pushing frame. A connecting member is horizontally arranged on the pushing vertical rod. A first locking member is provided on the connecting member and connected to the pushing vertical rod. A second locking member is also provided on the connecting member. The two pushing horizontal rods pass through the second locking member laterally. A push plate is provided at one end of the two pushing horizontal rods near the separable bearing platform.

3. The follower-separable collision test device based on inertial sustained velocity according to claim 2, characterized in that... The first locking member is threadedly connected to the connecting member. The first locking member has a vertical rod through-hole in the middle. A first adjustment notch is provided on one side of the vertical rod through-hole. The first adjustment notch extends outward on both sides to form a first clamping part. A first clamping hole is coaxially provided on the two first clamping parts.

4. The follower-separable collision test device based on inertial sustained velocity according to claim 3, characterized in that... The second locking member has mounting portions at both ends. The second locking member is connected to the connector through screw holes on the mounting portions. The second locking member has a crossbar through-hole in the middle. A second adjustment notch is provided on one side of the crossbar through-hole. The upper and lower sides of the second adjustment notch extend outward to form a second clamping portion. A second clamping hole is coaxially provided on the two clamping portions.

5. A servo-separable collision test device based on inertial sustained velocity according to claim 1, characterized in that... At least three position sensors are arranged at equal intervals. The second position sensor, which is used to control the push device to actively decelerate, is used to control the push device to actively decelerate. The equally spaced position sensors are used to obtain the actual speed of the separable carrier platform before the impact, and can also be used to calibrate the drive speed.

6. The follower-separable collision test device based on inertial sustained velocity according to claim 1, characterized in that... The drive device includes a drive motor, drive chains, drive wheels, and driven wheels. There are two drive wheels, located on the left and right sides of the support bracket, respectively. A drive shaft is provided between the two drive wheels, and the drive shaft is coaxially connected to the output shaft of the drive motor. There are also two driven wheels, located on the left and right sides of the support bracket, respectively. A driven shaft is provided between the two driven wheels. There are two drive chains, one connecting the drive wheel and the driven wheel on the left, and the other connecting the drive wheel and the driven wheel on the right. The two sides of the downward pushing part are fixedly connected to the two drive chains.

7. The follower-separable collision test device based on inertial sustained velocity according to claim 1, characterized in that... The detachable support platform includes a support plate for placing the sample to be tested. A weight holder is provided on the support plate, and a weight is attached to the weight holder by a hanging rope.

8. A servo-separable collision test device based on inertial sustained velocity according to claim 7, characterized in that... The active deceleration mechanism described above includes a deceleration plate located between the impact platform and the support plate. The top surface of the deceleration plate is higher than the bottom surface of the support plate, but the top surface of the deceleration plate is not higher than the top surface of the support plate.

9. A servo-separable collision test device based on inertial sustained velocity according to claim 1, characterized in that... A limit sensor is provided on the rear side of the support bracket.

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