Safety belt dynamic test seat and safety belt dynamic test method

Abstract

The invention relates to the technical field of intelligent cabin safety evaluation, in particular to a safety belt dynamic test seat and a safety belt dynamic test method. The dynamic test seat for the safety belt comprises a base, a backrest, a cushion, a first locking assembly and a second locking assembly, wherein the backrest is rotationally connected with the base; one end of the cushion is rotationally connected with the base, and the other end of the cushion is rotationally connected with a leg support; the first locking assembly comprises a first locking screw rod and a first locking nut and is used for fixing the backrest and the cushion; the second locking assembly comprises a second locking screw and a second locking nut and is used for fixing the leg support and the cushion. By adjusting the state of the seat, the seat can be adjusted to be in the standard seat state or the zero-gravity seat state, the first locking assembly and the second locking assembly are matched, locking is reliable, occupied space is small, and follow-up interference generated when the safety belt is installed in a real vehicle point position is avoided. And meanwhile, a dynamic test method ensures that the passenger can be well protected when in different sitting posture states.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent cockpit safety assessment, and in particular to a seat belt dynamic test seat and a seat belt dynamic test method. Background Art

[0002] With the development of vehicle technology, the degree of vehicle intelligence continues to improve, and people are paying more attention to comfort. Smart cockpits have become the mainstream trend in the development of driverless vehicles. The biggest difference between smart cockpits and traditional cockpits is that the more ergonomic zero-gravity seats have replaced traditional seats, which has significantly changed the posture of the human body on zero-gravity seats compared to traditional seats. At present, the zero-gravity state of seats has been defined as a standard operating condition by many models, but the existing test standard GB 14166-2013 stipulates that the dynamic rigid seat back angle of the seat belt is 10°, so it is impossible to verify the restraint capacity of the seat belt in the zero-gravity state of the seat. At the same time, there is no test method for the restraint capacity of the seat belt in the zero-gravity state of the seat in the industry.

[0003] Therefore, there is an urgent need for a seat belt dynamic test seat and a seat belt dynamic test method that can detect the restraint ability of the seat belt when the seat is in a zero-gravity state and verify whether the seat belt is qualified in all aspects. Summary of the invention

[0004] The purpose of this application is to provide a seat belt dynamic test seat and a seat belt dynamic test method to address the above problems.

[0005] In a first aspect, the present application provides a seat belt dynamic test seat, comprising: Base, a backrest, the backrest being rotatably connected to the base; A seat cushion, one end of which is rotatably connected to the base, and the other end of which is rotatably connected to a leg support; a first locking assembly, the first locking assembly comprising a first locking screw and a first locking nut, the first locking screw being capable of passing through the backrest and the seat cushion and being threadedly connected with the backrest and the seat cushion, the first locking nut being threadedly connected with the first locking screw for fixing the backrest and the seat cushion; The second locking assembly comprises a second locking screw and a second locking nut, the second locking screw can pass through the leg rest and the seat cushion, and the second locking nut is threadedly connected to the second locking screw for fixing the leg rest and the seat cushion.

[0006] According to the technical solution provided in the embodiment of the present application, the first locking screw has a plurality of fixing parts and a plurality of connecting parts arranged in sequence, the connecting parts include a first connecting part and a second connecting part, the backrest is connected to the first connecting part, the seat cushion is connected to the second connecting part, and the first locking nut is connected to the fixing part to limit the backrest and the seat cushion.

[0007] According to the technical solution provided in the embodiment of the present application, the backrest and the seat cushion are threadedly connected to the first locking screw, and the thread directions of the fixing portion and the connecting portion are opposite.

[0008] According to the technical solution provided in the embodiment of the present application, the first locking nut includes a first part and a second part, the first part is provided with an internal thread for threaded connection with the first locking screw, and the second part has a through hole with an inner diameter greater than the outer diameter of the first locking screw, and the through hole can pass through the first locking screw so that the second part presses the backrest or the seat cushion.

[0009] According to the technical solution provided in the embodiment of the present application, the seat belt dynamic test seat also includes a support seat, which is placed under the seat cushion and is rotatably connected to the seat cushion to support the seat cushion.

[0010] In a second aspect, the present application provides a seat belt dynamic test method, the method using the above-mentioned seat belt dynamic test seat, the method comprising: The angle between the backrest and the seat cushion is adjusted to a first preset angle range, the dummy is in a standard sitting position, and a dynamic test is performed after the seat belt is fastened, a first group of evaluation indicators are obtained, and it is determined whether the first group of evaluation indicators are all less than the corresponding first group of preset safety values. If the first group of evaluation indicators are all less than the corresponding first group of preset safety values, the tested seat belt meets the dynamic performance requirements under the standard seat state; Adjusting the angle between the backrest and the seat cushion, and adjusting the angle between the seat cushion and the leg rest, so that the dummy is in a zero-gravity sitting posture, performing a dynamic test after fastening the seat belt, obtaining a second group of evaluation indicators, and judging whether the second group of evaluation indicators are all less than the corresponding second group of preset safety values. If the second group of evaluation indicators are all less than the corresponding second group of preset safety values, the tested seat belt meets the dynamic performance requirements in the zero-gravity seat state; If the seat belt under test meets the dynamic performance requirements in the standard seat state and meets the dynamic performance requirements in the zero-gravity seat state, the seat belt under test is qualified.

[0011] According to the technical solution provided in the embodiment of the present application, the first group of evaluation indicators includes at least the first dummy chest displacement and the first dummy hip displacement, and the first group of preset safety values ​​includes at least the first dummy chest displacement preset safety value and the first dummy hip displacement preset safety value.

[0012] According to the technical solution provided in the embodiment of the present application, the first group of evaluation indicators also includes the real-time speed of the dummy chest, and the first group of preset safety values ​​also includes the preset safety value of the real-time speed of the dummy chest; The first dummy hip displacement of the front row dummy is less than the first dummy hip displacement preset safety value, and the first dummy chest displacement is greater than the first dummy chest displacement preset safety value. If the real-time speed of the dummy chest is less than the real-time speed preset safety value, the tested seat belt meets the dynamic performance requirements under the standard seat state; if the real-time speed of the dummy chest is greater than the real-time speed preset safety value, a restraint system test is performed, and the dummy does not collide with the hard object in front, then the tested seat belt meets the dynamic performance requirements under the standard seat state; The first dummy hip displacement of the rear dummy is less than the preset safety value of the first dummy hip displacement, and the first dummy chest displacement is greater than the preset safety value of the first dummy chest displacement. When the restraint system test is performed and the dummy does not collide with the hard object in front, the tested seat belt meets the dynamic performance requirements under the standard seat state.

[0013] According to the technical solution provided in the embodiment of the present application, the second group of evaluation indicators includes at least the second dummy chest displacement, the second dummy hip displacement, the shoulder strap force and the waist belt force, and the second group of preset safety values ​​includes at least the second dummy chest displacement preset safety value, the second dummy hip displacement preset safety value, the shoulder strap force safety value and the waist belt force safety value.

[0014] According to the technical solution provided in the embodiment of the present application, the shoulder strap force is less than the shoulder strap force safety value, and the waist belt force is less than the waist belt force safety value. If the sum of the second dummy's chest displacement or the second dummy's hip displacement is greater than the corresponding sum of the second dummy's chest displacement preset safety value or the second dummy's hip displacement preset safety value, a restraint system test is performed, and there is no collision between the dummy and the hard object in front, then the tested seat belt meets the dynamic performance requirements under the zero-gravity seat state.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: the present application provides a seat for dynamic testing of seat belts, which realizes the adjustment of the seat state by arranging a rotating connection between the backrest, the seat cushion and the leg rest and the base, so that the seat can be adjusted to a standard seat state or a zero-gravity seat state. In combination with the first locking assembly and the second locking assembly, the locking is reliable, less space is occupied, and interference with the subsequent installation of the seat belt at the actual vehicle point is avoided.

[0016] The present application also provides a seat belt dynamic testing method, which can better test the restraint ability of the seat belt even when the occupant is in a zero-gravity seat state, thereby improving the seat belt dynamic testing method and ensuring that the occupant can receive good protection in different sitting positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a seat belt dynamic test seat provided in an embodiment of the present application; Figure 2 A schematic diagram of the connection structure between the seat cushion, backrest and base provided in an embodiment of the present application; Figure 3 A schematic diagram of the connection structure between the leg support and the seat cushion provided in an embodiment of the present application; Figure 4 A schematic diagram of the first locking screw structure provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of a second locking screw provided in an embodiment of the present application; Figure 6 A schematic diagram of a standard seat working condition of a seat belt dynamic test seat provided in an embodiment of the present application; Figure 7 A schematic diagram of a zero-gravity seat working state of a seat belt dynamic test seat provided in an embodiment of the present application; Figure 8 A flow chart of a seat belt dynamic testing method provided in an embodiment of the present application; The text annotations in the figure represent: 1. Base; 2. Backrest; 3. Cushion; 4. Leg rest; 5. First locking assembly; 51. First locking screw; 511. First fixing portion; 512. First connecting portion; 513. Second fixing portion; 514. Second connecting portion; 515. Third fixing portion; 516. Position limiting portion; 52. First locking nut; 6. Second locking assembly; 61. Second locking screw; 611. Fourth fixing portion; 612. Third connecting portion; 613. Fifth fixing portion; 62. Second locking nut; 7. Support seat. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only 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 belong to the scope of protection of the present invention.

[0019] It should be noted that the terms used in the present invention are only for describing specific embodiments, rather than limiting the scope of the present application. As shown in the present specification, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method or device including the elements.

[0020] like Figure 1-7 As shown, the present application provides a seat belt dynamic test seat comprising a base 1, a backrest 2, a seat cushion 3 and a leg support 4, wherein the backrest 2 is rotatably connected to the base 1; one end of the seat cushion 3 is rotatably connected to the base 1, and the other end is rotatably connected to the leg support 4. The angles between the backrest 2 and the base 1, the seat cushion 3 and the base 1, and the leg support 4 and the seat cushion 3 are adjusted to meet the standard seat ( Figure 6 shown) and Zero Gravity Seat ( Figure 7 ) two working conditions.

[0021] The seat belt dynamic test seat provided in the present application also includes a first locking assembly 5 and a second locking assembly 6, wherein the first locking assembly 5 includes a first locking screw 51 and a first locking nut 52, the first locking screw 51 can pass through the backrest 2 and the seat cushion 3, and is threadedly connected to the backrest 2 and the seat cushion 3, the first locking nut 52 is threadedly connected to the first locking screw 51, and is used to fix the backrest 2 and the seat cushion 3; the second locking assembly 6 includes a second locking screw 61 and a second locking nut 62, the second locking screw 61 can pass through the leg rest 4 and the seat cushion 3, the second locking nut 62 is threadedly connected to the second locking screw 61, and is used to fix the leg rest 4 and the seat cushion 3. This locking method is reliable in locking, occupies less space, and avoids interference in the subsequent installation of the seat belt at the actual vehicle point.

[0022] The first locking screw 51 has a plurality of fixing parts and a plurality of connecting parts arranged in sequence, the connecting parts include a first connecting part 512 and a second connecting part 514, the backrest 2 is connected to the first connecting part 512, the seat cushion 3 is connected to the second connecting part 514, and the first locking nut 52 is connected to the fixing parts to limit the backrest 2 and the seat cushion 3. Limiting parts 516 are also provided at both ends of the first locking screw 51, and the cross section of the limiting part 516 is a square structure to prevent deflection.

[0023] like Figure 4As shown, the first locking screw 51 provided in this embodiment specifically includes a first limiting portion, a first fixing portion 511, a first connecting portion 512, a second fixing portion 513, a second connecting portion 514, a third fixing portion 515 and a second limiting portion which are connected in sequence, wherein the backrest 2 is threadedly connected to the first connecting portion 512, and the first locking nut 52 connected to the first fixing portion 511 and the second fixing portion 513 is used to fix the backrest 2, and the seat cushion 3 is threadedly connected to the second connecting portion 514, and the first locking nut 52 connected to the second fixing portion 513 and the third fixing portion 515 is used to fix the seat cushion 3.

[0024] Furthermore, the thread direction of the fixing portion is opposite to that of the connecting portion. In the present embodiment, the first connecting portion 512 and the second connecting portion 514 are right-handed threads, and the first fixing portion 511, the second fixing portion 513 and the third fixing portion 515 are left-handed threads. The fixing portions are locked by means of reverse thread fastening. Compared with other fixing methods, the fixing portions are more reliable in locking and occupy less space.

[0025] Each first locking nut 52 includes a first part and a second part. The first part is provided with an internal thread for threaded connection with the first locking screw 51, and the second part has a through hole with an inner diameter greater than the outer diameter of the first locking screw 51. The through hole can pass through the first locking screw 51 so that the second part can press the backrest 2 or the seat cushion 3 to be fixed, and further accommodate the offset of the backrest 2 and the seat cushion 3.

[0026] like Figure 5 As shown, the second locking screw 61 is basically the same as the first locking screw 51, including a plurality of fixing parts and connecting parts, wherein the connecting part is used to connect the leg support 4. Specifically, the second locking screw 61 provided in this embodiment specifically includes a third limiting part, a fourth fixing part 611, a third connecting part 612, a fifth fixing part 613 and a fourth limiting part connected in sequence, wherein the leg support 4 is threadedly connected to the third connecting part 612, and the second locking nut 62 connected to the fourth fixing part 611 and the fifth fixing part 613 is used to fix the leg support 4. The third connecting part 612 is a right-handed thread, and the fourth fixing part 611 and the fifth fixing part 613 are left-handed threads. They are locked by a reverse thread fastening method. Compared with other fixing methods, they have reliable locking and take up less space. Similarly, the structure of each second locking nut 62 is the same as that of the first locking nut 52, and no further elaboration is made here.

[0027] The seat belt dynamic test seat provided in this embodiment also includes a support seat 7, which is placed below the seat cushion 3 and is rotatably connected to the seat cushion 3 via a connecting rod. One end of the connecting rod is rotatably connected to the seat cushion 3, and the other end is rotatably connected to a connecting portion on the support seat 7. The connecting position between the connecting portion and the bottom of the support seat 7 is adjustable, thereby achieving the function of the support seat 7 supporting the seat cushion 3 without affecting the rotation angle of the seat cushion 3.

[0028] like Figure 8 As shown, this embodiment also provides a seat belt dynamic test method, using the seat belt dynamic test seat as described above, the method includes: The angle between the backrest 2 and the seat cushion 3 is adjusted to a first preset angle range, the dummy is in a standard sitting position, and a dynamic test is performed after the seat belt is fastened to obtain a first group of evaluation indicators, and it is determined whether the first group of evaluation indicators are all less than the corresponding first group of preset safety values. If the first group of evaluation indicators are all less than the corresponding first group of preset safety values, the tested seat belt meets the dynamic performance requirements under the standard seat state; Adjust the angle between the backrest 2 and the seat cushion 3, and adjust the angle between the seat cushion 3 and the leg support 4, so that the dummy is in a zero-gravity sitting posture, and perform a dynamic test after fastening the seat belt to obtain the second group of evaluation indicators, and determine whether the second group of evaluation indicators are all less than the corresponding second group of preset safety values. If the second group of evaluation indicators are all less than the corresponding second group of preset safety values, the tested seat belt meets the dynamic performance requirements under the zero-gravity seat state; If the seat belt under test meets the dynamic performance requirements in the standard seat state and meets the dynamic performance requirements in the zero-gravity seat state, the seat belt under test is qualified.

[0029] Specifically, the first group of evaluation indicators at least includes the first dummy chest displacement and the first dummy hip displacement, and accordingly, the first group of preset safety values ​​at least includes the first dummy chest displacement preset safety value and the first dummy hip displacement preset safety value.

[0030] If the first dummy's hip displacement is less than the preset safety value of the first dummy's hip displacement, and the first dummy's chest displacement is less than the preset safety value of the first dummy's chest displacement, then the seat belt under test meets the dynamic performance requirements under the standard seat state; if the first dummy's hip displacement is greater than the preset safety value of the first dummy's hip displacement, then the seat belt under test does not meet the dynamic performance requirements under the standard seat state; if the first dummy's hip displacement is less than the preset safety value of the first dummy's hip displacement, and the first dummy's chest displacement is greater than the preset safety value of the first dummy's chest displacement, further verification is performed according to the following situations.

[0031] When measuring the performance of the rear seat belts, a restraint system test is carried out. If the rear dummy does not collide with any hard object in front, the seat belt under test meets the dynamic performance requirements under the standard seat state; when measuring the performance of the front seat belts, the first group of evaluation indicators also includes the real-time speed of the dummy's chest. Accordingly, the first group of preset safety values ​​also includes the preset safety value of the real-time speed of the dummy's chest. If the real-time speed of the dummy's chest is less than the preset safety value of the real-time speed of the dummy's chest, the seat belt under test meets the dynamic performance requirements under the standard seat state; if the real-time speed of the dummy's chest is greater than the preset safety value of the real-time speed of the dummy's chest, a restraint system test is carried out. If the front dummy does not collide with any hard object in front, the seat belt under test meets the dynamic performance requirements under the standard seat state.

[0032] Specifically, the second group of evaluation indicators at least includes the second dummy chest displacement, the second dummy hip displacement, the shoulder strap force and the waist belt force. At present, there is no unified regulation in the industry for the evaluation indicators in the zero-gravity seat state. This embodiment selects the above four evaluation indicators, and appropriate indicators can be included in the second group of evaluation indicators in the future according to the industry research situation. Correspondingly, the second group of preset safety values ​​at least includes the second dummy chest displacement preset safety value, the second dummy hip displacement preset safety value, the shoulder strap force safety value and the waist belt force safety value. When confirming the second group of preset safety values, it can be obtained through CAE simulation, or the test matrix can be designed to obtain it according to experimental results.

[0033] This embodiment provides a test matrix setting scheme, the test method is a 50km / h trolley simulated frontal collision test, during the entire collision process, only the seat belt plays a restraining role on the dummy. By changing the force limit value of the seat belt, or the maximum value of each evaluation index in the second group of evaluation indicators, two sets of preset safety values ​​are obtained.

[0034] If the chest displacement of the second dummy is less than the preset safety value of the second dummy chest displacement, the hip displacement of the second dummy is less than the preset safety value of the second dummy hip displacement, the shoulder strap force is less than the shoulder strap force safety value, and the waist belt force is less than the waist belt force safety value, then the tested seat belt meets the dynamic performance requirements under the zero-gravity seat state; if the shoulder strap force is greater than the sum of the shoulder strap force safety values, or the waist belt force is greater than the waist belt force safety value, then the tested seat belt does not meet the dynamic performance requirements under the zero-gravity seat state; if the belt force is less than the shoulder strap force safety value, the waist belt force is less than the waist belt force safety value, the second dummy chest displacement is greater than the corresponding sum of the preset safety values ​​of the second dummy chest displacement, or the second dummy hip displacement is greater than the preset safety value of the second dummy hip displacement, further restraint system experiments are carried out, and if the dummy does not collide with the hard object in front, then the tested seat belt meets the dynamic performance requirements under the zero-gravity seat state.

[0035] The seat belt dynamic testing method provided in the present application can better test the restraining ability of the seat belt even when the occupant is in a zero-gravity seat state, thereby improving the seat belt dynamic testing method and ensuring that the occupant can receive good protection in different sitting positions.

[0036] Among them, before the test, the first set of preset safety values ​​and the second set of preset safety values ​​can be determined by developing the vehicle model restraint system layout plan. 8 sets of seat belt assemblies are selected as test samples, and dynamic pre-aging treatment is performed on test samples No. 1-8, including: retractor durability, buckle durability, salt spray test, dust test, etc. Samples No. 1-2 are subjected to dynamic performance tests under standard seat conditions to determine whether the first dummy hip displacement is less than the first dummy hip displacement preset safety value, and whether the first dummy chest displacement is less than the first dummy chest displacement preset safety value. If satisfied, it meets the dynamic performance requirements under the standard seat state. If not satisfied, samples No. 3-4 are used for restraint system experiments. If the restraint system results meet the requirements, it is determined to meet the dynamic performance requirements under the standard seat state. If the restraint system does not meet the requirements, it is determined to be unqualified. Samples No. 5-6 are subjected to dynamic performance tests in the zero-gravity seat state to determine whether the chest displacement of the second dummy is less than the preset safety value of the second dummy chest displacement, whether the hip displacement of the second dummy is less than the preset safety value of the second dummy hip displacement, whether the shoulder strap force is less than the shoulder strap force safety value, and whether the waist belt force is less than the waist belt force safety value. If so, the dynamic performance requirements in the zero-gravity seat state are met. If not, sample No. 7-8 is used to verify the restraint system. If the restraint system results meet the requirements, it is determined to meet the dynamic performance requirements in the zero-gravity seat state. If the restraint system does not meet the requirements, it is determined to be unqualified.

[0037] If the seat belt dynamic requirements in both the standard seat state and the zero-gravity seat state are met, the seat belt is judged to meet the development requirements of the vehicle model and is a qualified product.

[0038] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A seat belt dynamic test seat, characterized in that: include: Base (1), A backrest (2), the backrest (2) being rotatably connected to the base (1); A seat cushion (3), one end of the seat cushion (3) being rotatably connected to the base (1), and the other end of the seat cushion (3) being rotatably connected to a leg support (4); A first locking assembly (5), the first locking assembly (5) comprising a first locking screw (51) and a first locking nut (52), the first locking screw (51) being capable of passing through the backrest (2) and the seat cushion (3) and being threadedly connected to the backrest (2) and the seat cushion (3), the first locking nut (52) being threadedly connected to the first locking screw (51) and being used to fix the backrest (2) and the seat cushion (3); A second locking assembly (6), the second locking assembly (6) comprising a second locking screw (61) and a second locking nut (62), the second locking screw (61) being capable of passing through the leg support (4) and the seat cushion (3), the second locking nut (62) being threadedly connected to the second locking screw (61) for fixing the leg support (4) and the seat cushion (3).

2. The seat belt dynamic test seat according to claim 1, characterized in that: The first locking screw (51) has a plurality of fixing parts and a plurality of connecting parts arranged in sequence, the connecting parts comprising a first connecting part (512) and a second connecting part (514), the backrest (2) is connected to the first connecting part (512), the seat cushion (3) is connected to the second connecting part (514), and the first locking nut (52) is connected to the fixing parts to limit the backrest (2) and the seat cushion (3).

3. The seat belt dynamic test seat according to claim 2, characterized in that: The backrest (2) and the seat cushion (3) are threadedly connected to the first locking screw (51), and the thread directions of the fixing portion and the connecting portion are opposite.

4. The seat belt dynamic test seat according to claim 1, characterized in that: The first locking nut (52) comprises a first part and a second part, the first part being provided with an internal thread for being threadedly connected to the first locking screw (51), and the second part being provided with a through hole having an inner diameter greater than an outer diameter of the first locking screw (51), the through hole being capable of passing the first locking screw (51) so that the second part is pressed against the backrest (2) or the seat cushion (3).

5. The seat belt dynamic test seat according to claim 1, characterized in that: It also comprises a support seat (7), wherein the support seat (7) is placed below the seat cushion (3) and is rotatably connected to the seat cushion (3) to support the seat cushion (3).

6. A seat belt dynamic testing method, characterized in that: The method uses the seat belt dynamic test seat according to any one of claims 1 to 5, and the method comprises: The angle between the backrest (2) and the seat cushion (3) is adjusted to a first preset angle range, the dummy is in a standard sitting position, and a dynamic test is performed after the seat belt is fastened, a first group of evaluation indicators are obtained, and it is determined whether the first group of evaluation indicators are all less than the corresponding first group of preset safety values. If the first group of evaluation indicators are all less than the corresponding first group of preset safety values, then the tested seat belt meets the dynamic performance requirements under the standard seat state; Adjusting the angle between the backrest (2) and the seat cushion (3), and adjusting the angle between the seat cushion (3) and the leg support (4), so that the dummy is in a zero-gravity sitting posture, and performing a dynamic test after fastening the seat belt to obtain a second group of evaluation indicators, and judging whether the second group of evaluation indicators are all less than the corresponding second group of preset safety values. If the second group of evaluation indicators are all less than the corresponding second group of preset safety values, then the tested seat belt meets the dynamic performance requirements in the zero-gravity seat state; If the seat belt under test meets the dynamic performance requirements in the standard seat state and meets the dynamic performance requirements in the zero-gravity seat state, the seat belt under test is qualified.

7. The seat belt dynamic testing method according to claim 6, characterized in that: The first group of evaluation indicators at least includes a first dummy chest displacement and a first dummy hip displacement, and the first group of preset safety values ​​at least includes a first dummy chest displacement preset safety value and a first dummy hip displacement preset safety value.

8. The seat belt dynamic testing method according to claim 7, characterized in that: The first group of evaluation indicators also includes the real-time speed of the dummy chest, and the first group of preset safety values ​​also includes the preset safety value of the real-time speed of the dummy chest; The first dummy hip displacement of the front row dummy is less than the first dummy hip displacement preset safety value, and the first dummy chest displacement is greater than the first dummy chest displacement preset safety value. If the real-time speed of the dummy chest is less than the real-time speed preset safety value, the tested seat belt meets the dynamic performance requirements under the standard seat state; if the real-time speed of the dummy chest is greater than the real-time speed preset safety value, a restraint system test is performed, and the dummy does not collide with the hard object in front, then the tested seat belt meets the dynamic performance requirements under the standard seat state; The first dummy hip displacement of the rear dummy is less than the preset safety value of the first dummy hip displacement, and the first dummy chest displacement is greater than the preset safety value of the first dummy chest displacement. When the restraint system test is performed and the dummy does not collide with the hard object in front, the tested seat belt meets the dynamic performance requirements under the standard seat state.

9. The seat belt dynamic testing method according to claim 6, characterized in that: The second group of evaluation indicators at least includes the second dummy chest displacement, the second dummy hip displacement, the shoulder strap force and the waist belt force, and the second group of preset safety values ​​at least includes the second dummy chest displacement preset safety value, the second dummy hip displacement preset safety value, the shoulder strap force safety value and the waist belt force safety value.

10. The seat belt dynamic testing method according to claim 9, characterized in that: The shoulder strap force is less than the shoulder strap force safety value, and the waist belt force is less than the waist belt force safety value. If the sum of the second dummy's chest displacement or the second dummy's hip displacement is greater than the corresponding sum of the second dummy's chest displacement preset safety value or the second dummy's hip displacement preset safety value, a restraint system test is performed, and the dummy does not collide with the hard object in front, then the tested seat belt meets the dynamic performance requirements under the zero-gravity seat state.

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