Headrest swing impact mechanism and test method thereof

Abstract

The present invention belongs to the technical field of impact testing, and specifically provides a headrest swing impact mechanism and a test method thereof, wherein the headrest swing impact mechanism includes: a swing arm, a rotating shaft, an impact head mold, an adjustable counterweight assembly and a detection assembly; the detection assembly is arranged on the swing arm and is suitable for detecting the height information of the impact head mold; the control module is electrically connected to the detection assembly and is suitable for receiving the height information of the detection assembly; the control module is configured to obtain the counterweight thickness information according to the height information, so as to adjust the counterweight thickness of the adjustable counterweight assembly according to the counterweight thickness information. The height information of the impact head mold is accurately measured by the detection assembly, and the corresponding counterweight thickness information is obtained according to the height information, and the counterweight thickness of the adjustable counterweight assembly is accurately adjusted according to the counterweight thickness information, so as to meet the impact test requirements of seats with different headrest heights.

Description

Technical Field

[0001] The invention belongs to the technical field of impact testing, and in particular relates to a headrest swing impact mechanism and a testing method thereof. Background Art

[0002] The headrest impact test is an important part of the automobile safety performance assessment. The head is hit against the headrest at a specific speed to evaluate the energy absorption performance and shock absorption effect of the headrest.

[0003] In the related art, in order to ensure that the head shape can reach the theoretical moment of inertia when impacting the headrest and meet the relevant safety standards, the position of the head shape cannot be adjusted, so only the headrest with a fixed height can be impact tested.

[0004] However, in actual use, due to the different heights of passengers, the height of the headrest needs to be adjusted. The headrest after the height adjustment has not been impact tested and the safety of the passengers cannot be guaranteed.

[0005] Therefore, how to solve the problem that the height position of the headrest in the impact mechanism in the prior art cannot be adjusted is a technical problem that needs to be solved urgently.

[0006] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0007] The embodiments of the present disclosure at least provide a headrest swing impact device and a testing method thereof.

[0008] In a first aspect, an embodiment of the present disclosure provides a headrest swing impact mechanism, comprising:

[0009] Swing arm;

[0010] A rotating shaft, which is arranged at one end of the swing arm;

[0011] An impact head die, which is arranged at the other end of the swing arm and is suitable for adjusting the position of the impact head die on the swing arm through an adjusting member;

[0012] An adjustable counterweight assembly, which is arranged at the other end of the swing arm;

[0013] A detection component, which is arranged on the swing arm and is suitable for detecting height information of the impact head die;

[0014] a control module, which is electrically connected to the detection component and is suitable for receiving height information of the detection component;

[0015] The control module is configured to obtain the counterweight thickness information according to the height information, so as to subsequently adjust the counterweight thickness of the adjustable counterweight assembly according to the counterweight thickness information.

[0016] In an optional embodiment, the adjusting member includes:

[0017] A fixing plate, which is arranged on the swing arm;

[0018] An adjusting plate, which is slidably arranged on the fixing plate, and the impact head die is arranged on the adjusting plate;

[0019] An adjusting screw has one end inserted into the adjusting hole of the adjusting plate and rotatably connected to the adjusting plate, and the other end threadably connected to the threaded adjusting groove on the fixing plate.

[0020] In an optional embodiment, the detection component includes:

[0021] A laser distance measuring sensor, which is arranged on the swing arm;

[0022] The detection plate is arranged on the adjustment plate and is used for reflecting the laser emitted by the laser ranging sensor.

[0023] In an optional implementation, the control module acquires the counterweight thickness information according to the height information, so that the step of subsequently adjusting the counterweight thickness of the adjustable counterweight assembly according to the counterweight thickness information includes:

[0024] Calibrate the zero point of the impact head mold, where the zero point refers to the position of the impact head mold when it is at the lowest point. At this time, the height information detected by the detection component represents the distance value between the dynamic calibration plate and the fixed calibration plate. When the theoretical moment of inertia of the impact head mold is satisfied, the weight thickness information of the adjustable weight assembly is the first preset weight thickness information, where the weight thickness information represents the thickness value of the adjustable weight assembly when the weight is counterweighted with a weight plate with a diameter of 50 mm;

[0025] Acquire the height information of the impact head mold after the position is adjusted through the detection component;

[0026] The weight thickness information is obtained based on the height information. The calculation formula is as follows:

[0027] y=[(J d0 -J b0 ) / J p0 ]+[(x-C0) / (C1-C0)]*(H1-H0);

[0028] Where x represents the height information of the impact head mold after the adjustment, in mm; y represents the thickness information of the weight required for the impact head mold after the adjustment, in mm; J d0The theoretical moment of inertia of the impact head die at zero point, in kgm 2 ; J b0 It is the calibration value of the total moment of inertia of the swing arm at the zero point, in kgm 2 ; J p0 The moment of inertia of the counterweight with a diameter of 50 mm and a thickness of 1 mm, in kgm 2 / mm; C0 is the height information at the zero point; C1 is the height information at the second calibration point; H0 is the first preset weight thickness information of the adjustable weight assembly at the zero point; H1 is the second preset weight thickness information of the adjustable weight assembly at the second calibration point;

[0029] The second calibration point refers to the position of the impact head mold when the adjustable counterweight assembly satisfies the theoretical rotational inertia value of the impact head mold when the second preset counterweight thickness information is used.

[0030] In an optional embodiment, a dynamic calibration plate is provided on the impact head die;

[0031] A fixed calibration plate is provided on the swing arm;

[0032] The detection component detects the height information of the impact head mold, that is, the distance value between the dynamic calibration plate and the fixed calibration plate.

[0033] In an optional embodiment, the adjustable counterweight assembly includes:

[0034] A bearing rod, which is arranged at one end of the swing arm away from the rotating shaft;

[0035] The counterweight part is sleeved on the bearing rod.

[0036] In an optional embodiment, the counterweight portion is cylindrical, and the diameter of the counterweight portion is 50 mm;

[0037] The weight thickness information indicates a thickness value of the weight portion.

[0038] In an optional implementation, the counterweight portion is composed of counterweight plates of various thicknesses, so that the thickness value of the counterweight portion can be subsequently adjusted according to the counterweight thickness information.

[0039] In a second aspect, the embodiment of the present disclosure further provides a method for testing the headrest swing impact mechanism as described above, comprising:

[0040] Adjust the height of the headrest of the seat to be tested;

[0041] According to the height of the headrest, the position of the impact head mold of the headrest swing impact mechanism is adjusted;

[0042] Acquire the height information of the impact head mold through the detection component;

[0043] Obtaining weight thickness information based on height information;

[0044] Adjusting the counterweight thickness of the adjustable counterweight assembly according to the counterweight thickness information;

[0045] Drive the rotating shaft to rotate and perform impact test.

[0046] In an optional implementation, the step of obtaining the counterweight thickness information based on the height information includes:

[0047] Calibrate the zero point of the impact head mold, where the zero point refers to the position of the impact head mold when it is at the lowest point. At this time, the height information detected by the detection component represents the distance value between the dynamic calibration plate and the fixed calibration plate. When the theoretical moment of inertia of the impact head mold is satisfied, the weight thickness information of the adjustable weight assembly is the first preset weight thickness information, where the weight thickness information represents the thickness value of the adjustable weight assembly when the weight is counterweighted with a weight plate with a diameter of 50 mm;

[0048] Acquire the height information of the impact head mold after the position is adjusted through the detection component;

[0049] The weight thickness information is obtained based on the height information. The calculation formula is as follows:

[0050] y=[(J d0 -J b0 ) / J p0 ]+[(x-C0) / (C1-C0)]*(H1-H0);

[0051] Where x represents the height information of the impact head mold after the adjustment, in mm; y represents the thickness information of the weight required for the impact head mold after the adjustment, in mm; J d0 The theoretical moment of inertia of the impact head die at zero point, in kgm 2 ; J b0 It is the calibration value of the total moment of inertia of the swing arm at the zero point, in kgm 2 ; J p0 The moment of inertia of the counterweight with a diameter of 50 mm and a thickness of 1 mm, in kgm 2 / mm; C0 is the height information at the zero point; C1 is the height information at the second calibration point; H0 is the first preset weight thickness information of the adjustable weight assembly at the zero point; H1 is the second preset weight thickness information of the adjustable weight assembly at the second calibration point;

[0052] The second calibration point refers to the position of the impact head mold when the adjustable counterweight assembly satisfies the theoretical rotational inertia value of the impact head mold when the second preset counterweight thickness information is used.

[0053] The beneficial effect of the present invention is that the headrest swing impact mechanism and the test method thereof accurately measure the height information of the impact head mold through the detection component, and obtain the corresponding counterweight thickness information according to the height information, and accurately adjust the counterweight thickness according to the counterweight thickness information through the adjustable counterweight component, thereby meeting the impact test requirements of seats with different headrest heights.

[0054] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the specific implementation methods of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 A schematic diagram of the structure of a headrest swing impact mechanism provided in an embodiment of the present disclosure;

[0058] Figure 2 A cross-sectional view of a headrest swing impact mechanism provided in an embodiment of the present disclosure;

[0059] Figure 3 A schematic diagram of the structure of an adjustable counterweight assembly provided in an embodiment of the present disclosure;

[0060] Figure 4 A partial electrical control schematic diagram of a headrest swing impact mechanism provided in an embodiment of the present disclosure;

[0061] Figure 5 A flow chart of a method for testing a headrest swing impact mechanism provided in an embodiment of the present disclosure.

[0062] In the figure: 100, swing arm; 110, fixed calibration plate; 200, rotating shaft; 300, impact head mold; 310, dynamic calibration plate; 400, adjusting member; 410, fixed plate; 411, threaded adjustment groove; 412, slide groove; 420, adjustment plate; 421, adjustment hole; 422, auxiliary plate; 430, adjustment screw; 500, detection assembly; 510, laser ranging sensor; 520, detection plate; 600, adjustable counterweight assembly; 610, load-bearing rod; 620, counterweight part; 621, counterweight plate. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, in the drawings, the thickness of the components may be exaggerated or reduced in order to effectively describe the technical content.

[0065] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0066] See also Figure 1 and Figure 2At least one embodiment provides a headrest swing impact mechanism, including: a swing arm 100; a rotating shaft 200, which is arranged at one end of the swing arm 100; an impact head mold 300, which is arranged at the other end of the swing arm 100 and is suitable for adjusting the position of the impact head mold 300 on the swing arm 100 through an adjusting member 400; an adjustable counterweight assembly 600, which is arranged at the other end of the swing arm 100; a detection assembly 500, which is arranged on the swing arm 100 and is suitable for detecting height information of the impact head mold 300; a control module, which is electrically connected to the detection assembly 500 and is suitable for receiving the height information of the detection assembly 500; the control module is configured to obtain counterweight thickness information based on the height information, so as to adjust the counterweight thickness of the adjustable counterweight assembly 600 based on the counterweight thickness information. The height information of the impact head mold 300 is accurately measured through the detection component 500, and the corresponding counterweight thickness information is obtained based on the height information. The counterweight thickness of the adjustable counterweight component 600 is accurately adjusted based on the counterweight thickness information, thereby meeting the impact test requirements of seats with different headrest heights.

[0067] Please continue reading Figure 1 and Figure 2 In some embodiments, the adjusting member 400 includes: a fixing plate 410, which is arranged on the swing arm 100; an adjusting plate 420, which is slidably arranged on the fixing plate 410, and the impact head mold 300 is arranged on the adjusting plate 420; an adjusting screw 430, one end of which is inserted into the adjusting hole 421 of the adjusting plate 420 and is rotatably connected to the adjusting plate 420, and the other end of which is threadedly connected to the threaded adjusting groove 411 on the fixing plate 410. When adjusting the height of the impact head mold 300, the adjusting screw 430 is manually screwed to make the impact head mold 300 rise and fall on the fixing plate 410, and the threaded adjusting groove 411 on the fixing plate 410 cooperates with the adjusting screw 430, so as to prevent the impact head mold 300 from moving after the position is adjusted.

[0068] It should be noted that in order to further ensure that the impact head mold 300 does not move after the position is adjusted, the fixing bolts are passed through the auxiliary plate 422 and the slide groove 412 of the fixed plate 410 in sequence, and then fixed to the adjustment plate 420, so as to fix the impact head mold 300 after adjustment.

[0069] Please continue reading Figure 1 In some embodiments, the detection component 500 includes: a laser ranging sensor 510, which is arranged on the swing arm 100; and a detection plate 520, which is arranged on the adjustment plate 420 and is used to reflect the laser emitted by the laser ranging sensor 510.

[0070] Specifically, the detection plate 520 is fixedly disposed on the auxiliary plate 422 of the adjustment plate 420 . When the adjustment plate 420 slides on the fixed plate 410 , the detection plate 520 slides following the adjustment plate 420 and the auxiliary plate 422 .

[0071] See also Figure 4 In order to display the distance detected by the laser ranging sensor 510 , in a preferred embodiment, the control module is also electrically connected to a display module for displaying the distance detected by the laser ranging sensor 510 .

[0072] The specific process of obtaining the weight thickness information is described below:

[0073] In some embodiments, the control module obtains the weight thickness information according to the height information, so that the step of subsequently adjusting the weight thickness of the adjustable weight assembly 600 according to the weight thickness information includes:

[0074] S141: Calibrate the zero point of the impact head mold 300, wherein the zero point refers to the position of the impact head mold 300 when it is at the lowest point. At this time, the height information detected by the detection component 500 represents the distance value between the dynamic calibration plate 310 and the fixed calibration plate 110. When the theoretical rotational inertia value of the impact head mold 300 is satisfied, the counterweight thickness information of the adjustable counterweight assembly 600 is the first preset counterweight thickness information, wherein the counterweight thickness information represents the thickness value of the adjustable counterweight assembly 600 when it is counterweighted with a counterweight plate with a diameter of 50 mm.

[0075] It should be noted that if Figure 1 As shown, the impact head die 300 is provided with a dynamic calibration plate 310; the swing arm 100 is provided with a fixed calibration plate 110; the detection component 500 detects the height information of the impact head die 300, that is, the distance value between the dynamic calibration plate 310 and the fixed calibration plate 110. When the zero point needs to be calibrated, the position of the impact head die 300 is first adjusted to the zero point, and then the distance value between the dynamic calibration plate 310 and the fixed calibration plate 110 is measured at this time and recorded as C0, and this distance is used as the height information of the impact head die 300 at the zero point, and the distance between the laser distance sensor 510 and the detection plate 520 at this time is measured by the laser distance sensor 510 and recorded as a0, thereby completing the calibration of the height information of the impact head die 300 at the zero point obtained by the laser distance sensor 510.

[0076] S142: The height information of the impact head mold 300 after the adjustment is obtained through the detection component 500. Specifically, the impact head mold 300 is adjusted to a height that matches the headrest height of the tested vehicle seat, and then the laser distance sensor 510 of the detection component 500 is controlled to obtain the distance between the laser distance sensor 510 and the detection plate 520 at this time, which is recorded as a.x , the height information of the impact head die 300 is x=a x -a0+C0.

[0077] S143: Obtaining weight thickness information based on the height information, the calculation formula is as follows:

[0078] y=[(J d0 -J b0 ) / J p0 ]+[(x-C0) / (C1-C0)]*(H1-H0);

[0079] Wherein, x represents the height information of the impact head mold 300 after the position is adjusted, in mm; y represents the thickness information of the counterweight required for the impact head mold 300 after the position is adjusted, in mm; J d0 The theoretical moment of inertia of the impact head die 300 at zero point, in kgm 2 ; J b0 is the total moment of inertia calibration value of the swing arm 100 at the zero point, in kgm 2 ; J p0 The moment of inertia of the counterweight with a diameter of 50 mm and a thickness of 1 mm, in kgm 2 / mm; C0 is the height information at the zero point; C1 is the height information at the second calibration point; H0 is the first preset counterweight thickness information of the adjustable counterweight assembly 600 at the zero point; H1 is the second preset counterweight thickness information of the adjustable counterweight assembly 600 at the second calibration point.

[0080] The second calibration point refers to the position of the impact head mold 300 when the adjustable counterweight assembly 600 satisfies the theoretical moment of inertia of the impact head mold 300 when the second preset counterweight thickness information is used.

[0081] The control module inputs the received height information x into the above formula, completes the calculation of the counterweight thickness information, and displays the counterweight thickness information on the display module. The counterweight of the adjustable counterweight assembly 600 is adjusted by manually viewing the counterweight thickness information on the display module, thereby ensuring the accuracy of the experimental data.

[0082] The structure of the adjustable counterweight assembly 600 is described below:

[0083] See also Figure 1 and Figure 3 In a preferred embodiment, the adjustable counterweight assembly 600 includes: a bearing rod 610, which is arranged at one end of the swing arm 100 away from the rotating shaft 200; and a counterweight portion 620, which is sleeved on the bearing rod 610.

[0084] The counterweight part 620 is cylindrical, and the diameter of the counterweight part 620 is 50 mm; the counterweight thickness information indicates the thickness value of the counterweight part 620. The counterweight part 620 is composed of counterweight sheets 621 of various thicknesses, so that the thickness value of the counterweight part 620 can be adjusted according to the counterweight thickness information.

[0085] When the thickness of the weight of the adjustable weight assembly 600 is adjusted, the weight plates 621 on the weight portion 620 are increased or decreased according to the height displayed on the display module, thereby ensuring the accuracy of the data and improving the convenience of measurement.

[0086] In some embodiments, an acceleration sensor is disposed in the impact head mold 300 , and the acceleration of the impact head mold 300 in the impact test is measured by the acceleration sensor for subsequent evaluation of the protective effect of the headrest against head impact.

[0087] In a preferred embodiment, the weight verification is performed according to the above-mentioned headrest swing impact mechanism, and the experimental data are as follows: the height information C0 at the zero point is -14.5mm, the height information C1 at the second calibration point is 11.50mm, the first preset weight thickness information H0 of the adjustable weight assembly 600 at the zero point is 33.84mm, the second preset weight thickness information H1 of the adjustable weight assembly 600 at the second calibration point is 43.48mm, and the theoretical moment of inertia value J of the impact head mold 300 at the zero point is 0. d0 2.904kgm 2 , the total moment of inertia calibration value J of the swing arm 100 at the zero point b0 2.67kgm 2 The moment of inertia of the weight with a diameter of 50 mm and a thickness of 1 mm is J p0 0.0069kgm 2 / mm.

[0088] When the height information x=63.5mm, the calculated counterweight thickness information y=62.83mm; when the height information x=37.5mm, the calculated counterweight thickness information y=53.19mm.

[0089] See also Figure 5 At least one embodiment further provides a method for testing the headrest swing impact mechanism as described above, comprising:

[0090] S110: Adjust the height of the headrest of the vehicle seat to be tested;

[0091] S120: adjusting the position of the impact head mold 300 of the headrest swing impact mechanism according to the height of the headrest;

[0092] S130: Acquiring height information of the impact head mold 300 through the detection component 500;

[0093] S140: Obtaining weight thickness information according to the height information;

[0094] S150: adjusting the counterweight thickness of the adjustable counterweight assembly 600 according to the counterweight thickness information;

[0095] S160: driving the rotating shaft 200 to rotate and performing an impact test.

[0096] In an optional implementation, the step of obtaining the counterweight thickness information based on the height information includes:

[0097] The zero point of the impact head mold 300 is calibrated, wherein the zero point refers to the position of the impact head mold 300 when it is at the lowest point. At this time, the height information detected by the detection component 500 represents the distance value between the dynamic calibration plate 310 and the fixed calibration plate 110. When the theoretical rotational inertia value of the impact head mold 300 is satisfied, the counterweight thickness information of the adjustable counterweight assembly 600 is the first preset counterweight thickness information, wherein the counterweight thickness information represents the thickness value of the adjustable counterweight assembly 600 when it is counterweighted with a counterweight plate with a diameter of 50 mm.

[0098] Acquire the height information of the impact head mold 300 after the position is adjusted through the detection component 500;

[0099] The weight thickness information is obtained based on the height information. The calculation formula is as follows:

[0100] y=[(J d0 -J b0 ) / J p0 ]+[(x-C0) / (C1-C0)]*(H1-H0);

[0101] Wherein, x represents the height information of the impact head mold 300 after the position is adjusted, in mm; y represents the thickness information of the counterweight required for the impact head mold 300 after the position is adjusted, in mm; J d0 The theoretical moment of inertia of the impact head die 300 at zero point, in kgm 2 ; J b0 is the total moment of inertia calibration value of the swing arm 100 at the zero point, in kgm 2 ; J p0 The moment of inertia of the counterweight with a diameter of 50 mm and a thickness of 1 mm, in kgm 2 / mm; C0 is the height information at the zero point; C1 is the height information at the second calibration point; H0 is the first preset weight thickness information of the adjustable weight assembly 600 at the zero point; H1 is the second preset weight thickness information of the adjustable weight assembly 600 at the second calibration point;

[0102] The second calibration point refers to the position of the impact head mold 300 when the adjustable counterweight assembly 600 satisfies the theoretical moment of inertia of the impact head mold 300 when the second preset counterweight thickness information is used.

[0103] In summary, the present invention provides a headrest swing impact mechanism and a test method thereof, wherein the headrest swing impact mechanism includes: a swing arm 100; a rotating shaft 200, which is arranged at one end of the swing arm 100; an impact head mold 300, which is arranged at the other end of the swing arm 100 and is suitable for adjusting the position of the impact head mold 300 on the swing arm 100 through an adjusting member 400; an adjustable counterweight assembly 600, which is arranged at the other end of the swing arm 100; a detection assembly 500, which is arranged on the swing arm 100 and is suitable for detecting height information of the impact head mold 300; a control module, which is electrically connected to the detection assembly 500 and is suitable for receiving height information of the detection assembly 500; the control module is configured to obtain counterweight thickness information based on the height information, so as to adjust the counterweight thickness of the adjustable counterweight assembly 600 based on the counterweight thickness information later. The height information of the impact head mold 300 is accurately measured through the detection component 500, and the corresponding counterweight thickness information is obtained based on the height information. The counterweight thickness is accurately adjusted according to the counterweight thickness information through the adjustable counterweight component 600, thereby meeting the impact test requirements of seats with different headrest heights.

[0104] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A headrest swing impact mechanism, characterized in that: include: SwingArm(100); A rotating shaft (200) disposed at one end of the swing arm (100); an impact head die (300), which is arranged at the other end of the swing arm (100) and is suitable for adjusting the position of the impact head die (300) on the swing arm (100) through an adjusting member (400); An adjustable counterweight assembly (600) disposed at the other end of the swing arm (100); a detection component (500), which is arranged on the swing arm (100) and is suitable for detecting height information of the impact head die (300); a control module, which is electrically connected to the detection component (500) and is suitable for receiving height information of the detection component (500); The control module is configured to obtain the counterweight thickness information according to the height information, so as to subsequently adjust the counterweight thickness of the adjustable counterweight assembly (600) according to the counterweight thickness information, namely: Calibrate the zero point of the impact head mold (300); Acquiring height information of the impact head mold (300) after the position is adjusted through the detection component (500); The weight thickness information is obtained based on the height information. The calculation formula is as follows: y=[(J d0 -J b0 ) / J p0 ]+[(x-C0) / (C1-C0)]*(H1-H0); Wherein, x represents the height information of the impact head mold (300) after the position is adjusted, and the unit is mm; y represents the thickness information of the counterweight required for the impact head mold (300) after the position is adjusted, and the unit is mm; J d0 The theoretical moment of inertia of the impact head die (300) at zero point, in kgm 2 ; J b0 is the total moment of inertia calibration value of the swing arm (100) at the zero point, in kgm 2 ; J p0 The moment of inertia of the counterweight with a diameter of 50 mm and a thickness of 1 mm, in kgm 2 / mm; C0 is the height information at the zero point; C1 is the height information at the second calibration point; H0 is the first preset counterweight thickness information of the adjustable counterweight assembly (600) at the zero point; H1 is the second preset counterweight thickness information of the adjustable counterweight assembly (600) at the second calibration point.

2. The headrest swing impact mechanism according to claim 1, characterized in that: The adjusting member (400) comprises: A fixing plate (410) disposed on the swing arm (100); an adjustment plate (420) which is slidably disposed on the fixing plate (410), and the impact head die (300) is disposed on the adjustment plate (420); An adjusting screw rod (430) has one end inserted into the adjusting hole (421) of the adjusting plate (420) and rotatably connected to the adjusting plate (420), and the other end threadably connected to the threaded adjusting groove (411) on the fixing plate (410).

3. The headrest swing impact mechanism according to claim 2, characterized in that: The detection component (500) comprises: A laser distance measuring sensor (510), which is arranged on the swing arm (100); A detection plate (520) is arranged on the adjustment plate (420) and is used to reflect the laser light emitted by the laser distance measuring sensor (510).

4. The headrest swing impact mechanism according to claim 1, characterized in that: The control module obtains the counterweight thickness information according to the height information, so as to adjust the counterweight thickness of the adjustable counterweight assembly (600) according to the counterweight thickness information in the subsequent step. The zero point refers to the position when the impact head mold (300) is at the lowest point. At this time, the height information detected by the detection component (500) represents the distance value between the dynamic calibration plate (310) and the fixed calibration plate (110). When the theoretical moment of inertia of the impact head mold (300) is satisfied, the weight thickness information of the adjustable weight assembly (600) is the first preset weight thickness information, wherein the weight thickness information represents the thickness value of the adjustable weight assembly (600) when the weight is counterbalanced with a weight plate with a diameter of 50 mm; The second calibration point refers to the position of the impact head mold (300) when the adjustable counterweight assembly (600) satisfies the theoretical moment of inertia value of the impact head mold (300) when the second preset counterweight thickness information is met.

5. The headrest swing impact mechanism according to claim 1, characterized in that: The impact head die (300) is provided with a dynamic calibration plate (310); A fixed calibration plate (110) is provided on the swing arm (100); The detection component (500) detects height information of the impact head die (300), that is, the distance value between the dynamic calibration plate (310) and the fixed calibration plate (110).

6. The headrest swing impact mechanism according to claim 1, characterized in that: The adjustable counterweight assembly (600) comprises: A bearing rod (610) disposed at one end of the swing arm (100) away from the rotating shaft (200); A counterweight portion (620) is sleeved on the bearing rod (610).

7. The headrest swing impact mechanism according to claim 6, characterized in that: The counterweight portion (620) is cylindrical, and the diameter of the counterweight portion (620) is 50 mm; The counterweight thickness information indicates the thickness value of the counterweight part (620).

8. The headrest swing impact mechanism according to claim 7, characterized in that: The counterweight portion (620) is composed of counterweight plates (621) of various thicknesses, so that the thickness value of the counterweight portion (620) can be adjusted later according to the counterweight thickness information.

9. A method for testing a headrest swing impact mechanism as claimed in claim 1, characterized in that: include: Adjust the height of the headrest of the seat to be tested; According to the height of the headrest, the position of the impact head mold (300) of the headrest swing impact mechanism is adjusted; Acquiring height information of the impact head mold (300) through a detection component (500); Obtaining weight thickness information based on height information; Adjusting the counterweight thickness of the adjustable counterweight assembly (600) according to the counterweight thickness information; driving the rotating shaft (200) to rotate and perform an impact test; The thickness of the counterweight of the adjustable counterweight assembly (600) is adjusted according to the counterweight thickness information, namely: Calibrate the zero point of the impact head mold (300); Acquiring height information of the impact head mold (300) after the position is adjusted through the detection component (500); The weight thickness information is obtained based on the height information. The calculation formula is as follows: y=[(J d0 -J b0 ) / J p0 ]+[(x-C0) / (C1-C0)]*(H1-H0); Wherein, x represents the height information of the impact head mold (300) after the position is adjusted, and the unit is mm; y represents the thickness information of the counterweight required for the impact head mold (300) after the position is adjusted, and the unit is mm; J d0 The theoretical moment of inertia of the impact head die (300) at zero point, in kgm 2 ; J b0 is the total moment of inertia calibration value of the swing arm (100) at the zero point, in kgm 2 ; J p0 The moment of inertia of the counterweight with a diameter of 50 mm and a thickness of 1 mm, in kgm 2 / mm; C0 is the height information at the zero point; C1 is the height information at the second calibration point; H0 is the first preset counterweight thickness information of the adjustable counterweight assembly (600) at the zero point; H1 is the second preset counterweight thickness information of the adjustable counterweight assembly (600) at the second calibration point.

10. The method for testing the headrest swing impact mechanism according to claim 9, characterized in that: In the step of obtaining the weight thickness information according to the height information: The zero point refers to the position when the impact head mold (300) is at the lowest point. At this time, the height information detected by the detection component (500) represents the distance value between the dynamic calibration plate (310) and the fixed calibration plate (110). When the theoretical moment of inertia of the impact head mold (300) is satisfied, the weight thickness information of the adjustable weight assembly (600) is the first preset weight thickness information, wherein the weight thickness information represents the thickness value of the adjustable weight assembly (600) when the weight is counterbalanced with a weight plate with a diameter of 50 mm; The second calibration point refers to the position of the impact head mold (300) when the adjustable counterweight assembly (600) satisfies the theoretical moment of inertia value of the impact head mold (300) when the second preset counterweight thickness information is met.

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