Suspension fixing device for head drop experiment of Q dummy

Abstract

The utility model provides a suspension fixing device for a Q dummy head drop experiment, and aims to overcome the defects that an existing suspension device for the Q dummy head drop experiment is inaccurate in angle adjustment, poor in stability and the like. The fixing device comprises an electromagnet connecting block, an L-shaped connecting rod and a head connecting block, is a middle connecting piece of a Q dummy head and dummy head falling equipment, and is divided into a head forward falling experiment hanging and fixing device and a head lateral falling experiment hanging and fixing device according to the head forward lateral falling angle requirement. According to the utility model, the falling angle of the head can be accurately and quickly adjusted, the installation is simple and one-step, the preparation time before an experiment is greatly shortened, and the consistency and the stability of experimental data are guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of automobile collision safety testing, in particular to a Q dummy head drop test suspension fixing device. Background Art

[0002] Automobile safety has always been a common concern and issue of importance to the whole society. With the increasing number of family passenger cars, the importance of automobile safety protection is self-evident. The research on injuries of child passengers has become a hot topic in the field of vehicle safety. In automobile collision safety protection, the research on automobile safety child restraint systems has received great attention both at home and abroad, and Q dummies are playing an increasingly important role in the development of child restraint systems and child collision protection. As the most advanced child dummies for automobile collision tests, the Q series child dummies are also the most widely used in current regulations.

[0003] Like the adult dummy, the Q dummy also needs to be recalibrated before the experiment to ensure the reliability of the data. In road traffic accidents, the head is the most frequently injured part, and head impact injury is a common injury and one of the main causes of death in traffic accidents. Therefore, the mechanical analysis of head impact injury is of great significance.

[0004] According to regulatory requirements, the Q dummy head drop test is divided into a head forward drop and a head lateral drop. Take the Q6 head as an example: the head forward and lateral drop heights are the same, and the lowest point of the head is required to be 130±1mm away from the head drop test table. However, the head forward and lateral drop angles are different. The forward drop of the head requires that the angle between the head back cover plane and the head drop test table is 28°±2°; the lateral drop of the head requires that the angle between the head and neck connection surface and the head drop test table is 55°±2°. The original suspension device is to suspend the estimated head through a thin rope net, and the head is adjusted by rotating and continuously measuring the drop angle with an inclinometer to meet regulatory requirements. Due to the structure of the head itself, the head will shake when measuring the angle, which will cause gross errors and inaccurate test results. To this end, we need to design a simple, convenient and reliable head suspension device to solve this problem based on the consistency of the head drop requirements of the Q series dummies. Utility Model Content

[0005] In order to solve the above technical problems, the utility model designs a Q dummy head drop test suspension and fixing device. Before the head drop test, the utility model can quickly suspend the head component and make it accurately meet the head's positive lateral drop angle requirements.

[0006] The purpose of the utility model is achieved through the following technical solutions: A Q dummy head drop test suspension fixing device includes an electromagnet connecting block, an L-shaped connecting rod, and a head connecting block. The device is an intermediate connecting piece between the Q dummy head and the dummy head drop device. According to the requirements of the positive and lateral falling angles of the head, it is divided into a head positive drop test suspension fixing device and a head lateral drop test suspension fixing device.

[0007] The electromagnet connecting block is fixed to one end of the L-shaped connecting rod by a screw, and is magnetically connected to the electromagnet device of the head suspension device. One end of the L-shaped connecting rod is fixed to the electromagnet connecting block, and the other end of the L-shaped connecting rod is fixed to the head connecting block by screws and positioning pins. The head connecting block is fixed to the neck connecting end of the measured head by a screw.

[0008] Furthermore, the structure of the suspension fixing device for the head direct and lateral drop test is the same, but the angles between the electromagnet connecting block and the L-shaped connecting rod are different. The angle between the electromagnet connecting block and the L-shaped connecting rod of the forward device is 62°, and the angle between the electromagnet connecting block and the L-shaped connecting rod of the lateral device is 55°, which meets the requirements for the direct and lateral drop angle of the head.

[0009] Furthermore, the electromagnet connecting block is circular and has six symmetrical through holes therein, the purpose of which is to reduce the counterweight of the device, and the two countersunk holes in the middle are screw holes for connecting the L-shaped connecting rod.

[0010] Furthermore, two threaded holes are provided at the top of the long end of the L-shaped connecting rod for fixing the electromagnet connecting block, a threaded hole is provided at the short end, and two positioning pin holes are provided for fixing the head connecting block. Notches are provided at the corners to prevent the connecting rod from interfering with the head to be measured when the head is installed.

[0011] Furthermore, the head connecting block is square, and has through holes corresponding to the threaded holes at four diagonal corners for fixing the head to be tested. There are four symmetrical through holes in the middle in order to reduce the weight of the device. There is a countersunk hole in the middle, which is fixed to the L-shaped connecting rod with screws, and locating pin holes are provided on both sides to prevent the head connecting block from loosening and rotating.

[0012] Furthermore, for different types of Q dummies, the mass of their head test counterweight blocks is different, all of which are half the mass of the corresponding dummy human force sensor. The counterweight requirements for Q1, Q1.5, Q3, and Q6 dummies are consistent, and the head drop test suspension fixture can be universal. The counterweight requirements for Q0 and Q10 dummies are different. According to different counterweight requirements, different holes are processed on the mounting parts, the peripheral strength of the structural parts is retained, and the middle thickness is adjusted to change the weight of the fixture to meet the counterweight requirements, so that it does not need to install a counterweight block with half the mass of the force sensor. Since the lower end of the head suspension device of the head drop test bench is an electromagnet structure, the electromagnet connecting blocks are all steel parts, and the L-shaped connecting rods are all aluminum parts. In order to meet different counterweight requirements, the head connecting blocks of Q0, Q1, Q1.5, Q3, and Q6 dummies are all aluminum parts, and the head connecting block of Q10 dummy is steel parts.

[0013] During the Q series head forward drop test, a suspension fixture with an angle of 62° between the electromagnet connection block and the L-shaped connecting rod is used to fix the head to be tested in a forward drop state, so that the rear cover plane of the head to be tested maintains an angle of 28° with the plane where the head drop test bench is located. During the Q series head lateral drop test, a suspension fixture with an angle of 55° between the electromagnet connection block and the L-shaped connecting rod is used to fix the head to be tested in a lateral drop state, so that the plane connecting the head to be tested and the neck maintains an angle of 55° with the plane where the head drop test bench is located.

[0014] It can be seen from the above technical scheme that the utility model has the following advantages: (1) The device provided by the utility model has a simple structure and is easy to process, which greatly saves the preparation time before the experiment, improves the experimental work efficiency, is convenient, has good use effect, and ensures the consistency and stability of the experimental data; (2) The device provided by the utility model can fix the head of the dummy to be tested with the head connecting block of the corresponding device according to the requirements of the dummy's head falling from the front to the side, so that it can quickly and conveniently determine the angle between the dummy's head and the head drop test bench, and ensure the stability of the experimental head, and the head will not shake due to adjusting the drop height; (3) The electromagnet connecting block provided by the utility model is directly connected to the anti-magnetic electromagnet of the head drop device, so as to achieve the experimental effect of power-off attraction and power-on release. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of a forward device of a Q dummy head drop test suspension fixture of the utility model;

[0016] Figure 2 It is a schematic diagram of a forward device of a Q dummy head drop test suspension fixture and a Q dummy head assembly before the test;

[0017] Figure 3 It is a schematic diagram of a lateral device of a Q dummy head drop test suspension fixture and a Q dummy head before assembly test of the utility model;

[0018] Figure 4 It is a side view of a forward device of a Q dummy head drop test suspension fixture and a Q dummy head assembly test before the test;

[0019] Among them: 1-electromagnet connection block, 2-L-type connection rod, 3-head connection block, 4-Q dummy head. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model and are not used to limit the utility model.

[0021] like Figure 1 , 3 As shown, the utility model provides a Q dummy head drop test suspension fixing device, comprising an electromagnet connecting block 1, an L-shaped connecting rod 2, and a head connecting block 3.

[0022] This device is the intermediate connecting piece between the Q dummy head and the dummy head drop device. According to the requirements of the head's forward and lateral drop angles, it is divided into a head forward drop test suspension fixture and a head lateral drop test suspension fixture.

[0023] The electromagnet connecting block 1 is fixed to one end of the L-shaped connecting rod 2 by screws, and is magnetically connected to the electromagnet device of the head suspension device. One end of the L-shaped connecting rod 2 is fixed to the electromagnet connecting block 1, and the other end of the L-shaped connecting rod 2 is fixed to the head connecting block 3 by screws and positioning pins. The head connecting block 3 is fixed to the neck connecting end of the measured head by screws.

[0024] The structures of the suspension fixing devices for the head direct lateral drop test are the same, but the angles between the electromagnet connecting block 1 and the L-shaped connecting rod 2 are different. The angle between the electromagnet connecting block 1 and the L-shaped connecting rod 2 in the forward device is 62°, and the angle between the electromagnet connecting block 1 and the L-shaped connecting rod 2 in the lateral device is 55°, which meets the direct lateral drop angle requirements of the head.

[0025] The electromagnet connection block 1 is circular and has six symmetrical through holes therein for the purpose of reducing the weight of the device. The two countersunk holes in the middle are screw holes for connecting the L-shaped connection rod 2 .

[0026] The top of the long end of the L-shaped connecting rod 2 is provided with two threaded holes for fixing the electromagnet connecting block 1, and the short end is provided with a threaded hole and two positioning pin holes for fixing the head connecting block 3. Notches are provided at the corners to prevent the connecting rod 2 from interfering with the head to be measured when the head is installed.

[0027] The head connecting block 3 is square, and has through holes corresponding to the threaded holes at four diagonal corners for fixing the head to be tested. There are four symmetrical through holes in the middle in order to reduce the counterweight of the device. There is a countersunk hole in the middle, which is fixed to the L-shaped connecting rod 2 with screws, and locating pin holes are provided on both sides to prevent the head connecting block 3 from loosening and rotating.

[0028] For different types of Q dummies, the mass of their head test counterweight blocks is different, all of which are half the mass of the corresponding dummy human force sensor. The counterweight requirements for Q1, Q1.5, Q3, and Q6 dummies are consistent, and the head drop test suspension fixture can be universal. The counterweight requirements for Q0 and Q10 dummies are different. According to different counterweight requirements, different holes are processed on the mounting parts, the peripheral strength of the structural parts is retained, and the middle thickness is adjusted to change the weight of the fixture to meet the counterweight requirements, so that it does not need to install a counterweight block with half the mass of the force sensor. Since the lower end of the head suspension device of the head drop test bench is an electromagnet structure, the electromagnet connecting block 1 is a steel part, and the L-shaped connecting rod 2 is an aluminum part. In order to meet different counterweight requirements, the head connecting block 3 of Q0, Q1, Q1.5, Q3, and Q6 dummies is an aluminum part, and the head connecting block 3 of Q10 dummy is a steel part.

[0029] During the Q series head forward drop test, a suspension fixture with an angle of 62° between the electromagnet connection block 1 and the L-shaped connection rod 2 is used to fix the head to be tested in a forward drop state, so that the rear cover plane of the head to be tested maintains an angle of 28° with the plane where the head drop test bench is located. During the Q series head lateral drop test, a suspension fixture with an angle of 55° between the electromagnet connection block 1 and the L-shaped connection rod 2 is used to fix the head to be tested in a lateral drop state, so that the plane connecting the head to be tested and the neck maintains an angle of 55° with the plane where the head drop test bench is located.

[0030] Take the Q6 dummy head forward drop test as an example. Use screws to connect one end of the device's head connection block 3 to the lower metal part of the head to be tested according to the hole position. The forward drop test suspension posture is forehead downward. The electromagnet connection block 1 is magnetically connected to the head drop suspension device to directly determine the angle requirement of the head drop without secondary adjustment. Refer to the Q dummy head drop gauge to adjust the head drop height, power on to release the head, and transmit the experimental data to the data collector through the sensor to complete the experiment.

[0031] The above detailed description of the utility model is intended to enable people familiar with the technology in this field to understand the content of the utility model and implement it. It is not intended to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A Q dummy head drop test suspension fixture, characterized in that: The device comprises an electromagnet connection block (1), an L-shaped connection rod (2), and a head connection block (3). The device is an intermediate connection piece between the Q dummy head and the dummy head drop device. According to the requirements of the head's forward and sideways drop angles, the device is divided into a head forward drop test suspension fixture and a head sideways drop test suspension fixture. The electromagnet connection block (1) is fixed to one end of the L-shaped connection rod (2) by means of screws, and is magnetically connected to the electromagnet device of the head suspension device. One end of the L-shaped connection rod (2) is fixed to the electromagnet connection block (1), and the other end of the L-shaped connection rod (2) is fixed to the head connection block (3) by means of screws and positioning pins. The head connection block (3) is fixed to the neck connection end of the head to be measured by means of screws.

2. A Q dummy head drop test suspension fixture according to claim 1, characterized in that: The structures of the suspension fixing devices for the head front and side drop experiments are the same, but the angles between the electromagnet connection block (1) and the L-shaped connection rod (2) are different. The angle between the electromagnet connection block (1) and the L-shaped connection rod (2) of the front device is 62°, and the angle between the electromagnet connection block (1) and the L-shaped connection rod (2) of the side device is 55°, which meets the requirements for the front and side drop angles of the head.

3. A Q dummy head drop test suspension fixture according to claim 1, characterized in that: The electromagnet connection block (1) is circular and has six symmetrical through holes therein for the purpose of reducing the counterweight of the device. The two countersunk holes in the middle are screw holes for connecting the L-shaped connection rod (2).

4. A Q dummy head drop test suspension fixture according to claim 1, characterized in that: The top of the long end of the L-shaped connecting rod (2) is provided with two threaded holes for fixing the electromagnet connecting block (1), the short end is provided with a threaded hole and two positioning pin holes for fixing the head connecting block (3), and a notch is provided at the corner to prevent the connecting rod (2) from interfering with the head to be measured when the head is installed.

5. The Q dummy head drop test suspension fixture according to claim 1, characterized in that: The head connection block (3) is square, with through holes corresponding to the threaded holes at four diagonal corners for fixing the head to be tested, four symmetrical through holes in the middle for reducing the weight of the device, a countersunk hole in the middle for fixing with the L-shaped connection rod (2) by screws, and positioning pin holes on both sides to prevent the head connection block from loosening and rotating.

6. A Q dummy head drop test suspension fixture according to claim 1, characterized in that: For different types of Q dummies, the mass of their head test counterweight blocks is different, all of which are half the mass of the corresponding dummy human force sensor. The counterweight requirements for Q1, Q1.5, Q3, and Q6 dummies are consistent, and the head drop test suspension fixture can be universal. The counterweight requirements for Q0 and Q10 dummies are different. According to different counterweight requirements, different holes are processed on the mounting parts, the peripheral strength of the structural parts is retained, and the middle thickness is adjusted to change the weight of the fixture to meet the counterweight requirements, so that it does not need to install a counterweight block with half the mass of the force sensor. Since the lower end of the head suspension device of the head drop test bench is an electromagnet structure, the electromagnet connecting block (1) is a steel part, and the L-shaped connecting rod (2) is an aluminum part. In order to meet different counterweight requirements, the head connecting block (3) of the Q0, Q1, Q1.5, Q3, and Q6 dummies is an aluminum part, and the head connecting block (3) of the Q10 dummy is a steel part.

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