Adjustable blasting dummy base

Abstract

The utility model relates to the technical field of automobile collision experiments, and provides an adjustable blasting dummy base. The adjustable blasting dummy base comprises a mounting base, a dummy back fixing base and a spring adjusting assembly, a connecting rotating shaft is fixedly connected to the symmetry axis position of the bottom face of the dummy back fixing base, and the dummy back fixing base is rotationally assembled on the mounting base through the connecting rotating shaft; the spring adjusting assembly comprises a spring and a distance adjuster, one end of the spring is connected with the false back fixing base, the other end of the spring is connected with the distance adjuster, and the distance adjuster is fixedly connected to the mounting base. According to the adjustable blasting dummy base, the relation between the stress and the displacement distance can be flexibly adjusted by adjusting the stretching state of the spring, and the applicability is high; fatigue deformation of the spring is compensated by adjusting the stretching state of the spring, and reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile collision experiments, in particular to an adjustable explosion dummy base. Background Art

[0002] Explosion dummies are mainly used to collect data in experimental environments. To ensure that the collected data can reflect the reactions of real people in specific environments, the data of the blasting dummies should be as close to real people as possible.

[0003] Taking the airbag explosion experiment as an example, the relationship between the force and displacement distance of the explosion dummy is limited to reflect the reaction of a real person under the same conditions. The existing technology usually uses a spring of specific length and strength to make a base to fix the explosion dummy, so as to control the relationship between the force and displacement distance.

[0004] In the prior art, the relationship between the force magnitude and the displacement distance is too simple and has low applicability. During use, the spring is prone to fatigue, which causes the relationship between the force magnitude and the displacement distance to change, and has low reliability. Utility Model Content

[0005] The utility model aims to provide an adjustable blasting dummy base, which can flexibly adjust the relationship between the force magnitude and the displacement distance by adjusting the tension state of the spring, and has high applicability; the fatigue deformation of the spring can be compensated by adjusting the tension state of the spring, and has high reliability.

[0006] The utility model provides an adjustable blasting dummy base, comprising:

[0007] Install the base;

[0008] A false back fixing base, wherein a connecting shaft is fixedly connected to the bottom surface symmetrical axis position of the false back fixing base, and the false back fixing base is rotatably assembled on the mounting base via the connecting shaft;

[0009] A spring adjustment component, the spring adjustment component includes a spring and a distance adjuster, one end of the spring is connected to the false back fixing base, the other end of the spring is connected to the distance adjuster, and the distance adjuster is fixedly connected to the mounting base.

[0010] Preferably, the distance adjuster comprises an adjusting fixed block and an adjusting slider, the adjusting fixed block is provided with a through hole, the adjusting slider is slidably assembled in the through hole, the adjusting fixed block is fixedly connected to the mounting base, and the adjusting slider is connected to the spring.

[0011] Preferably, the distance adjuster further comprises a positioning screw, the adjusting fixing block is further provided with a threaded through hole, the threaded through hole is vertically connected to the through hole, the positioning screw is assembled in the threaded through hole, and the positioning screw abuts against the adjusting slider.

[0012] Preferably, the inner wall of the through hole is provided with an internal thread, the outer wall of the adjusting slider is provided with an external thread, and the adjusting slider is assembled in the through hole by threaded engagement.

[0013] Preferably, one end of the adjusting slider is rotatably connected to an adjusting connecting block, and the adjusting connecting block is provided with a circular ring feature to connect the spring.

[0014] Preferably, a limiting block is fixedly connected to the mounting base, and the limiting blocks are symmetrically distributed on both sides of the connecting shaft. A snap-fit ​​feature is provided on the limiting block, and when the false back fixing base is rotated until one end contacts the upper surface of the mounting base, the other end of the false back fixing base snaps into the snap-fit ​​feature.

[0015] Preferably, a support block is fixedly connected to the mounting base, the number of the support blocks is 2, and a connecting shaft mounting hole is provided on the support block, and both ends of the connecting shaft are respectively assembled in the connecting shaft mounting holes of the two support blocks.

[0016] Preferably, a spring fixing block is fixedly connected to the upper surface of the false back fixing base, the number of the spring fixing blocks is the same as the springs, and a circular ring feature is provided on the spring fixing block to connect the springs.

[0017] Preferably, the number of the spring adjustment components is at least 2, and the spring adjustment components are symmetrically distributed with the connecting shaft as the symmetry axis.

[0018] Preferably, the adjustable blasting dummy base further comprises a fake back connecting column, the fake back connecting column is fixedly connected to the center of the top surface of the fake back fixing base, and a mounting groove is provided on the fake back connecting column for connecting the blasting dummy.

[0019] The technical solution of the utility model is to connect the mounting base and the dummy back fixing base by rotating the connecting shaft, control the relative rotation between the mounting base and the dummy back fixing base by the spring adjustment component, and adjust the stretching state of the spring by the distance adjuster, so as to realize the control of the relationship between the force size and the displacement distance of the blasting dummy. The stretching state of the spring can be adjusted in real time, and the applicability is higher. At the same time, adjusting the stretching state of the spring can compensate for the fatigue deformation of the spring and improve the reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is an axonometric diagram of an adjustable blasting dummy base of the utility model;

[0022] Figure 2 for Figure 1 Axonometric view of the mounting base in the adjustable blasting dummy base;

[0023] Figure 3 for Figure 1 Axonometric view of the fixed base of the dummy back in the adjustable blasting dummy base;

[0024] Figure 4 for Figure 1 Assembly drawing of the spring adjustment assembly in the adjustable blasting dummy base;

[0025] Figure 5 for Figure 1 Cross-section of the mid-range adjuster on the mid-adjustable blasting dummy base.

[0026] Description of reference numerals:

[0027] 1. Mounting base; 11. Limiting block; 12. Support block; 2. False back fixing base; 21. Connecting shaft; 22. Spring fixing block; 3. Spring adjustment assembly; 31. Spring; 32. Distance adjuster; 321. Adjusting fixing block; 322. Adjusting slider; 323. Positioning screw; 324. Adjusting connecting block; 4. False back connecting column. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are 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.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 directly connected, or indirectly connected through an intermediate medium, or it can 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 utility model can be understood according to specific circumstances.

[0031] Combination Figures 1 to 5 As shown, the utility model provides an adjustable blasting dummy base, which includes a mounting base 1 , a dummy back fixing base 2 and a spring adjustment assembly 3 .

[0032] Combination Figures 1 to 5 As shown, a connecting shaft 21 is fixedly connected to the bottom symmetrical axis position of the dummy back fixing base 2, and the dummy back fixing base 2 is rotatably assembled on the mounting base 1 through the connecting shaft 21; the spring adjustment assembly 3 includes a spring 31 and a distance adjuster 32, one end of the spring 31 is connected to the dummy back fixing base 2, and the other end of the spring 31 is connected to the distance adjuster 32, and the distance adjuster 32 is fixedly connected to the mounting base 1.

[0033] In this embodiment, the mounting base 1 and the dummy back fixing base 2 are rotatably connected by connecting the rotating shaft 21, the relative rotation between the mounting base 1 and the dummy back fixing base 2 is controlled by the spring adjustment assembly 3, and the distance adjuster 32 adjusts the tension state of the spring 31 to achieve the relationship between the force size and the displacement distance of the blasting dummy. The tension state of the spring 31 can be adjusted in real time, which has higher applicability. At the same time, adjusting the tension state of the spring 31 can compensate for the fatigue deformation of the spring 31 and improve reliability.

[0034] In this embodiment, adjusting the tension state of the spring 31 can change the relationship between the force magnitude and the displacement distance of the blasting dummy. By adjusting this relationship, the blasting dummy can simulate a variety of groups of people such as adult males, adult females or the elderly, thereby improving applicability. The tension state of the spring 31 can be adjusted before each experiment, which is beneficial for experimenters to understand and control the information of the experimental dummy and improve the reliability of the experimental results.

[0035] In some embodiments, in combination Figure 5 As shown, the distance adjuster 32 includes an adjusting fixed block 321 and an adjusting slider 322. The adjusting fixed block 321 is provided with a through hole, and the adjusting slider 322 is slidably assembled in the through hole. The adjusting fixed block 321 is fixedly connected to the mounting base 1, and the adjusting slider 322 is connected to the spring 31. The function of the distance adjuster 32 is to change the stretching length of the spring 31 to achieve a change in the stretching force of the spring.

[0036] In this embodiment, the adjusting slider 322 is slidably assembled on the adjusting fixed block 321 , and one end of the spring 31 is fixed on the adjusting slider 322 , and the stretching length of the spring 31 is changed by sliding the adjusting slider 322 .

[0037] In some embodiments, in combination Figure 5 As shown, the distance adjuster 32 also includes a positioning screw 323, and the adjustment fixing block 321 is also provided with a threaded through hole, and the threaded through hole is vertically connected to the through hole, and the positioning screw 323 is assembled in the threaded through hole, and the positioning screw 323 abuts against the adjustment slider 322. The positioning screw 323 is an anti-loosening design. After the stretching length of the spring 31 is adjusted, the position of the adjustment slider 322 is fixed by squeezing the positioning screw 323, thereby reducing the position deviation of the adjustment slider 322 during the experiment.

[0038] In some embodiments, in combination Figure 5As shown, the inner wall of the through hole is provided with an internal thread, and the outer wall of the adjusting slider 322 is provided with an external thread. The adjusting slider 322 is assembled in the through hole by threaded engagement. The threaded connection is a connection method between the adjusting fixed block 321 and the adjusting slider 322. The position of the adjusting slider 322 in the adjusting fixed block 321 can be adjusted by rotation to control the stretching length of the spring 31. At the same time, the threaded connection can improve the movement accuracy of the adjusting slider 322 and reduce the influence of the tension of the spring 31 on the position of the adjusting slider 322.

[0039] In some embodiments, in combination Figure 5 As shown, one end of the adjusting slider 322 is rotatably connected to an adjusting connecting block 324, and a circular ring feature is provided on the adjusting connecting block 324 to connect the spring 31. The adjusting connecting block 324 is a transition device connecting the adjusting slider 322 and the spring 31, which is beneficial to improving the connection effect between the adjusting slider 322 and the spring 31, especially when the adjusting fixed block 321 and the adjusting slider 322 are threadedly connected, the rotation of the adjusting slider 322 can be compensated, so that the rotation of the adjusting slider 322 will not affect the connection with the spring 31.

[0040] In some embodiments, in combination Figure 2 As shown, a limiting block 11 is fixedly connected to the mounting base 1, and the limiting blocks 11 are symmetrically distributed on both sides of the connecting shaft 21. A snap-on feature is provided on the limiting block 11. When the dummy back fixing base 2 is rotated to one end contacting the upper surface of the mounting base 1, the other end of the dummy back fixing base 2 is snapped into the snap-on feature. The limiting block 11 is a product of structural protection design. When the dummy back fixing base 2 is rotated to the extreme position of one end, the rotation of the dummy back fixing base 2 is limited at two positions at the same time, thereby improving the stress condition of the dummy back fixing base 2 and improving the overall structural strength.

[0041] In some embodiments, in combination Figure 2 As shown, the mounting base 1 is fixedly connected with a support block 12, the number of the support blocks 12 is 2, and a connecting shaft mounting hole is provided on the support block 12, and the two ends of the connecting shaft 21 are respectively assembled in the connecting shaft mounting holes of the two support blocks 12, and the support block 12 is a structure for realizing the rotational connection between the mounting base 1 and the false back fixed base 2, and is responsible for supporting the connecting shaft 21, so that sufficient rotation space is left between the mounting base 1 and the false back fixed base 2.

[0042] In some embodiments, in combination Figure 3As shown, the upper surface of the false back fixing base 2 is fixedly connected with a spring fixing block 22, the number of the spring fixing blocks 22 is the same as the spring 31, and the spring fixing block 22 is provided with a circular ring feature to connect the spring 31. The spring fixing block 22 is a connection transition device between the false back fixing base 2 and the spring 31, which can improve the connection effect while retaining sufficient connection space to accommodate the spring 31.

[0043] In some embodiments, in combination Figure 1 As shown, the number of the spring adjustment components 3 is at least 2, and the spring adjustment components 3 are symmetrically distributed with the connecting shaft 21 as the symmetry axis. The pulling forces provided by the symmetrical spring adjustment components 3 can offset each other, so that the spring is still in a stretched state when not under force, avoiding damage to the spring 31 caused by excessive compression due to the rotation of the false back fixed base 2.

[0044] In some embodiments, in combination Figure 1 As shown, the adjustable blasting dummy base also includes a dummy back connecting column 4, which is fixedly connected to the center of the top surface of the dummy back fixed base 2. The dummy back connecting column 4 is provided with a mounting groove to connect the blasting dummy. The position change of the dummy back connecting column 4 reflects the position change of the dummy, thereby realizing a connection device between the base and the dummy.

[0045] Working process: The dummy back fixed base 2 is rotatably connected to the mounting base 1 via the connecting shaft 21. The spring adjustment assembly 3 controls the rotation between the mounting base 1 and the dummy back fixed base 2. The stretching length of the spring 31 is adjusted by the distance adjuster 32. When the stretching length of the spring 31 increases, the tension of the spring 31 increases. Under the premise that the force remains unchanged, the displacement of the dummy fixed on the top decreases; conversely, when the stretching length of the spring 31 decreases, the displacement of the dummy increases.

[0046] Taking the requirement of applying a force of 500N at 450mm above the mounting base 1 and requiring the displacement to be within the range of 40mm±4mm as an example, after fixing the mounting base 1 at a specific position, apply a force of 500N to the dummy back connecting column 4 at 450mm above the mounting base 1, and then adjust the distance adjuster 32 to change the spring tension of the spring 31 until the displacement of the dummy meets the range requirement of 40mm±4mm, and then cancel the applied force of 500N. Since the change in the spring tension will cause the initial position of the dummy to shift, it is necessary to calculate the displacement of the dummy again in combination with the new initial position. At this time, if the calculated displacement meets the range of 40mm±4mm, the adjustment is completed. If it does not meet the range, repeat the above steps again.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An adjustable blasting dummy base, characterized in that: include: Mounting base (1); A false back fixing base (2), wherein a connecting shaft (21) is fixedly connected to the bottom surface symmetrical axis position of the false back fixing base (2), and the false back fixing base (2) is rotatably assembled on the mounting base (1) via the connecting shaft (21); A spring adjustment assembly (3), the spring adjustment assembly (3) comprising a spring (31) and a distance adjuster (32), one end of the spring (31) being connected to the false back fixing base (2), the other end of the spring (31) being connected to the distance adjuster (32), and the distance adjuster (32) being fixedly connected to the mounting base (1).

2. The adjustable blasting dummy base according to claim 1, characterized in that: The distance adjuster (32) comprises an adjusting fixed block (321) and an adjusting slider (322); the adjusting fixed block (321) is provided with a through hole, the adjusting slider (322) is slidably assembled in the through hole, the adjusting fixed block (321) is fixedly connected to the mounting base (1), and the adjusting slider (322) is connected to the spring (31).

3. The adjustable blasting dummy base according to claim 2, characterized in that: The distance adjuster (32) further comprises a positioning screw (323), the adjusting fixing block (321) is further provided with a threaded through hole, the threaded through hole is vertically connected to the through hole, the positioning screw (323) is assembled in the threaded through hole, and the positioning screw (323) abuts against the adjusting slider (322).

4. The adjustable blasting dummy base according to claim 2, characterized in that: The inner wall of the through hole is provided with an internal thread, the outer wall of the adjusting slider (322) is provided with an external thread, and the adjusting slider (322) is assembled in the through hole through threaded engagement.

5. The adjustable blasting dummy base according to claim 2, characterized in that: One end of the adjusting slider (322) is rotatably connected to an adjusting connection block (324), and the adjusting connection block (324) is provided with a circular ring feature for connecting to the spring (31).

6. The adjustable blasting dummy base according to claim 1, characterized in that: A limiting block (11) is fixedly connected to the mounting base (1), and the limiting blocks (11) are symmetrically distributed on both sides of the connecting shaft (21). A snap-fit ​​feature is provided on the limiting block (11), and when the dummy back fixing base (2) is rotated until one end contacts the upper surface of the mounting base (1), the other end of the dummy back fixing base (2) snaps into the snap-fit ​​feature.

7. The adjustable blasting dummy base according to claim 1, characterized in that: A support block (12) is fixedly connected to the mounting base (1), the number of the support blocks (12) is two, and a connecting shaft mounting hole is provided on the support block (12), and the two ends of the connecting shaft (21) are respectively assembled in the connecting shaft mounting holes of the two support blocks (12).

8. The adjustable blasting dummy base according to claim 1, characterized in that: A spring fixing block (22) is fixedly connected to the upper surface of the false back fixing base (2), the number of the spring fixing blocks (22) is the same as the number of the springs (31), and a circular ring feature is provided on the spring fixing block (22) to connect the springs (31).

9. The adjustable blasting dummy base according to claim 1, characterized in that: The number of the spring adjustment components (3) is at least 2, and the spring adjustment components (3) are symmetrically distributed with the connecting shaft (21) as a symmetry axis.

10. The adjustable blasting dummy base according to claim 1, characterized in that: It also comprises a false back connecting column (4), wherein the false back connecting column (4) is fixedly connected to the center of the top surface of the false back fixing base (2), and a mounting groove is provided on the false back connecting column (4) for connecting the blasting dummy.

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