Device for testing rigidity, strength and durability of automobile seat backrest

Abstract

The utility model relates to a rigidity, strength and durability testing device for an automobile seat backrest, which belongs to the technical field of automobile seat testing devices and comprises a testing table, a pressure applying mechanism, a rotating mechanism and a periodic pressure regulating mechanism. The pressure applying mechanism is used for applying acting force to the automobile seat backrest, and the pressure applying mechanism is arranged on the movable frame; the rotating mechanism comprises a rotating frame and an arc-shaped fluted disc, the fluted disc is connected with the test board, the moving frame is arranged in the rotating frame and can slide relative to the rotating frame, and the rotating frame surrounds the hinged position of the moving frame and the test board and rotates along the fluted disc; the periodic pressure regulating mechanism is in transmission connection with the pressure applying mechanism so as to enable the pressure applying mechanism to apply variable acting force to different positions of the automobile seat backrest, and the technical problems that in the prior art, an air cylinder pushing mode is limited in application range, and variable pressure testing cannot be conducted at different positions at the same time can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile seat testing devices, in particular to an automobile seat back rigidity strength durability testing device. Background Art

[0002] Car seats are an important part of car interiors. In addition to comfort, car seats also play a role in protecting passengers. Many laws and regulations have been introduced at home and abroad to regulate the strength and test methods of car seats. Scholars from various countries have also done a lot of research on car seat strength test methods and equipment. At present, most of the rigidity strength and durability test mechanisms for car seat backs use cylinder push forms, and use screws to adjust the front and rear positions of the pressure mechanism. There are limitations on the adaptability of the seat back at different tilt angles, and it is not possible to change the pressure test at different positions at the same time. Summary of the invention

[0003] In view of the various deficiencies in the prior art, a vehicle seat back rigidity strength durability testing device is proposed to solve the technical problems in the prior art that the cylinder pushing method has a limited adaptability range and cannot perform variable pressure tests at different positions at the same time.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A vehicle seat back rigidity strength durability testing device, comprising:

[0006] A test bench, wherein the test bench is provided with a platform for installing a car seat;

[0007] A pressure mechanism, which is used to apply a force to the backrest of the automobile seat, wherein the pressure mechanism is arranged on a mobile frame, and the bottom of the mobile frame is hinged to the test bench;

[0008] A rotating mechanism, comprising a rotating frame and an arc-shaped toothed disc, wherein the toothed disc is connected to the test bench, the moving frame is arranged inside the rotating frame, and the moving frame can slide relative to the rotating frame to change the position of the pressure mechanism, and the rotating frame rotates around the hinge between the moving frame and the test bench and along the toothed disc;

[0009] And a periodic pressure regulating mechanism is transmission-connected with the pressure applying mechanism to enable the pressure applying mechanism to apply variable forces to different positions of the automobile seat backrest.

[0010] The technical solution is further configured as follows: the pressure mechanism includes a compacting block and a joint bearing, and the joint bearing is arranged on the moving frame and connected to the compacting block.

[0011] This technical solution is further configured such that support shafts extending to the outside of its body are provided at both the top and bottom of the moving frame, and a long strip-shaped sliding groove for the support shafts to penetrate is provided on the rotating frame. The support shaft located at the bottom of the moving frame is hinged to the test bench.

[0012] This technical solution is further configured such that a moving frame driving assembly is further provided on the rotating frame. The moving frame driving assembly is in transmission connection with the moving frame to drive the support shaft to slide inside the sliding groove.

[0013] This technical solution is further configured such that a slider combination body is provided inside the sliding groove. The slider combination body includes an upper block and a lower block that are buckled together, and the support shaft penetrates the inner hole of the slider combination body.

[0014] This technical solution is further configured such that the periodic pressure regulating mechanism includes a first periodic pressure regulating mechanism. The first periodic pressure regulating mechanism includes a pressure regulating gear and an end face cam that are meshed with each other. The pressure regulating gear is in transmission connection with a first periodic pressure regulating driving assembly. The end face cam is provided on the moving frame. The spherical plain bearing penetrates the end face cam and is connected to the compaction block.

[0015] The end face cam is driven to rotate by the first periodic pressure regulating driving assembly, and the compaction block applies variable force pressure tests to different positions of the car seat backrest, realizing the first variable pressure compaction of the car seat backrest.

[0016] This technical solution is further configured such that the periodic pressure regulating mechanism includes a second periodic pressure regulating mechanism. The second periodic pressure regulating mechanism includes a cylindrical groove cam and a needle roller bearing roller. The cylindrical groove cam is in transmission connection with a second periodic pressure regulating driving assembly. The cylindrical groove cam is provided on the rotating frame. The needle roller bearing roller is rotatably provided inside the wheel groove of the cylindrical groove cam. The needle roller bearing roller is connected to the moving frame.

[0017] The needle roller bearing roller is driven to move back and forth by the second periodic pressure regulating driving assembly, and the moving frame is synchronously driven to swing back and forth, realizing the second variable pressure compaction of the car seat backrest.

[0018] This technical solution is further configured such that a pressure sensor is provided between the needle roller bearing roller and the moving frame.

[0019] This technical solution is further configured such that a locking seat body is provided on the rotating frame. A relief groove for the tooth disc to be embedded is opened on the locking seat body. Locking brake assemblies are provided on both sides of the tooth disc inside the locking seat body.

[0020] This technical solution is further configured such that an installation position and a test position are provided on the test bench, and the platform can move between the installation position and the test position.

[0021] The beneficial effects of the present utility model are as follows:

[0022] By setting the rotating frame to rotate along the toothed disc, the rotating frame can be rotated to any angle between the vertical state and the horizontal state to meet the test requirements for the automobile seat backrest at any inclination angle; by setting the moving frame to be slidable relative to the rotating frame, the pressure testing position of the automobile seat backrest is changed; by setting the periodic pressure regulating mechanism, the rigid strength and durability of the automobile seat backrest are tested with variable positions and variable pressures. Description of the Drawings

[0023] Figure 1 is the front view of the rigid strength and durability test device for the automobile seat backrest in the embodiment of the present utility model;

[0024] Figure 2 is the side view of the rigid strength and durability test device for the automobile seat backrest in the embodiment of the present utility model;

[0025] Figure 3 is the schematic diagram of the automobile seat backrest at the minimum inclination angle in the embodiment of the present utility model;

[0026] Figure 4 is the schematic diagram of the automobile seat backrest at the maximum inclination angle in the embodiment of the present utility model;

[0027] Figure 5 is the assembly schematic diagram of the test bench and the platform in the embodiment of the present utility model;

[0028] Figure 6 is the front view of the rotating frame in the embodiment of the present utility model;

[0029] Figure 7 is the side view of the rotating frame in the embodiment of the present utility model;

[0030] Figure 8 is the front view of the moving frame in the embodiment of the present utility model;

[0031] Figure 9 is the side view of the moving frame in the embodiment of the present utility model;

[0032] Figure 10 is the schematic diagram of the periodic pressure regulating mechanism in the embodiment of the present utility model;

[0033] Figure 11 is the schematic diagram of the locking brake assembly in the embodiment of the present utility model;

[0034] Figure 12It is an assembly schematic diagram of the support shaft and slider assembly in the embodiment of the present utility model;

[0035] Figure 13 It is a schematic diagram of the platform in the embodiment of the present utility model;

[0036] Figure 14 It is a schematic diagram of the second-cycle voltage regulating mechanism in the embodiment of the present utility model.

[0037] In the drawings: 1, installation position; 2, test position; 3, test bench; 4, platform; 5, rotating frame; 6, moving frame; 7, support connection block; 8, vertical test position; 9, horizontal test position; 11, swing support seat of rotating frame; 12, support frame; 13, gear disc; 14, fixed support; 15, seat drive assembly; 16, slider assembly; 17, sliding groove; 18, servo motor gear; 21, third servo motor; 23, turbine propulsion lead screw support; 24, propulsion lead screw moving seat; 25, driving handwheel; 26, worm shaft; 27, propulsion lead screw fixed seat; 28, driving lead screw; 29, first support shaft; 30, second support shaft; 31, first servo motor; 32, first servo motor reducer; 33, voltage regulating gear; 34, end face cam; 35, first cylindrical roller bearing; 36, compaction block; 37, compaction block seat; 38, second cylindrical roller bearing; 39, needle bearing roller; 40, pressure sensor; 41, spherical plain bearing; 42, pull-type electromagnetic switch; 43, locking seat body; 44, normally closed locking pressure spring; 45, movable shaft core; 46, brake pad; 47, gear disc locking position; 48, upper block; 49, lower block; 50, platform slide rail; 51, platform slider; 52, seat support platform; 53, connection block; 54, platform moving drive trapezoidal lead screw; 55, trapezoidal lead screw sleeve; 56, second servo motor; 57, second servo motor reducer; 58, coupling; 59, second angular contact cylindrical roller bearing; 60, cylindrical groove cam; 61, angular contact cylindrical roller bearing seat; 62, first angular contact cylindrical roller bearing. Detailed implementation manners

[0038] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the drawings of the present utility model. Based on the embodiments in this application, other similar embodiments obtained by those of ordinary skill in the art without making creative efforts shall all fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only references to the directions in the drawings. Therefore, the directional terms used are for illustration rather than to limit the present invention.

[0039] According to an embodiment of the present utility model, a rigid strength and durability test device for an automobile seat backrest is provided. Please refer toFigure 1 , Figure 2 , including a test bench 3, a pressing mechanism, a rotating mechanism and a periodic pressure regulating mechanism. A platform 4 for installing an automotive seat is provided on the test bench 3; the pressing mechanism is used to apply a force to the backrest of the automotive seat, the pressing mechanism is arranged on a moving frame 6, and the bottom of the moving frame 6 is hinged to the test bench 3; the rotating mechanism includes a rotating frame 5 and an arc-shaped gear disk 13, the gear disk 13 is connected to the test bench 3, the moving frame 6 is arranged inside the rotating frame 5, and the moving frame 6 can slide relative to the rotating frame 5 to change the position of the pressing mechanism, and the rotating frame 5 rotates around the hinge joint of the moving frame 6 and the test bench 3 and along the gear disk 13; the periodic pressure regulating mechanism is in transmission connection with the pressing mechanism to prompt the pressing mechanism to apply variable forces to different positions of the backrest of the automotive seat.

[0040] It should be noted that by setting the rotating frame 5 to rotate along the gear disk 13, the rotating frame 5 can be rotated to any angle between the vertical state and the horizontal state to meet the test requirements of the backrest of the automotive seat at any inclination angle; by setting the moving frame 6 to be able to slide relative to the rotating frame 5, the pressing position of the backrest of the automotive seat is changed; by setting the periodic pressure regulating mechanism, the durability test of the rigid strength of the backrest of the automotive seat with variable position and variable pressure is realized. That is to say, the utility model can realize the durability test of the backrest of the automotive seat at any inclination angle between the vertical state and the horizontal state; can realize the durability test of different longitudinal positions of the backrest of the automotive seat; can realize the durability test of non-periodic variable pressure at different positions of the backrest of the automotive seat at any inclination angle.

[0041] Specifically, when the backrest of the automotive seat is in the vertical test position 8, the inclination angle of the backrest of the automotive seat is the smallest. At this time, the backrest of the automotive seat is in the vertical state. Please refer to Figure 3 . When the backrest of the automotive seat is in the horizontal test position 9, the inclination angle of the backrest of the automotive seat is the largest. At this time, the backrest of the automotive seat is in the horizontal state. Please refer to Figure 4 .

[0042] In the device for testing the rigid strength durability of the backrest of the automotive seat in this embodiment, please refer to Figure 1 , Figure 10 , the pressing mechanism includes a compaction block 36 and a spherical plain bearing 41. The spherical plain bearing 41 is arranged on the moving frame 6 and is connected to the compaction block 36.

[0043] It should be noted that the compaction block 36 is used to apply a force to the car seat backrest. The compaction block 36 is arranged on the compaction block seat 37. The spherical plain bearing 41 is connected to the moving frame 6. At the same time, the spherical plain bearing 41 passes through the moving frame 6 and is fixed to the compaction block seat 37. That is to say, the compaction block 36 is connected to the moving frame 6 through the spherical plain bearing 41. When the spherical plain bearing 41 moves, it can rotate and swing at any angle, synchronously driving the compaction block 36 to rotate and swing.

[0044] In the car seat backrest rigid strength and durability test device of this embodiment, please refer to Figure 1 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 . Support shafts extending to the outside of its body are arranged at the top and bottom of the moving frame 6. A long strip-shaped sliding groove 17 for the support shaft to penetrate is arranged on the rotating frame 5. The support shaft at the bottom of the moving frame 6 is hinged to the test bench 3.

[0045] It should be noted that a first support shaft 29 is arranged at the top of the moving frame 6, and a second support shaft 30 is arranged at the bottom of the moving frame 6. Correspondingly, 2 sliding grooves 17 are arranged on the rotating frame 5, and the sliding grooves 17 extend along the height direction of the rotating frame 5. That is to say, the moving frame 6 and the rotating frame 5 are assembled through the first support shaft 29, the second support shaft 30 and the sliding groove 17 to achieve synchronous rotation. Above the test bench 3, a support frame 12 is arranged. A rotating frame swing support seat 11 and a gear disc 13 are arranged on the support frame 12. The rotating frame swing support seat 11 is hinged to the second support shaft 30 to form a hinge point. The rotating frame 5 rotates around this hinge point along the gear disc 13, so that the rotating frame 5, the moving frame 6 and the compaction block 36 can rotate to any angle between the vertical state and the horizontal state to meet the test requirements of the car seat backrest at any inclination angle.

[0046] In the car seat backrest rigid strength and durability test device of this embodiment, please refer to Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 . A moving frame driving component is further arranged on the rotating frame 5. The moving frame driving component is in transmission connection with the moving frame 6 to drive the support shaft to slide inside the sliding groove 17.

[0047] It should be noted that the moving frame driving component adopts a transmission structure combining a worm and worm gear with a lead screw, and includes a turbine propulsion lead screw support 23, a propulsion lead screw moving seat 24, a driving handwheel 25, a worm shaft 26, a propulsion lead screw fixing seat 27, and a driving lead screw 28. Among them, both the turbine propulsion lead screw support 23 and the propulsion lead screw fixing seat 27 are connected to the rotating frame 5, the propulsion lead screw moving seat 24 is connected to the moving frame 6, and the driving lead screw 28, the worm shaft 26, and the turbine are in transmission connection. By rotating the driving handwheel 25, the propulsion lead screw moving seat 24 and the moving frame 6 are driven to move up and down synchronously, so as to adjust the longitudinal position of the compaction block 36 and meet the test requirements for different positions of the automobile seat backrest.

[0048] In the rigid strength and durability test device for an automobile seat backrest of this embodiment, please refer to Figure 1 , Figure 6 , Figure 8 , Figure 9 and Figure 12 , a slider combination 16 is arranged inside the sliding groove 17. The slider combination 16 includes an upper block 48 and a lower block 49 that are buckled together, and the support shaft penetrates through the inner hole of the slider combination 16.

[0049] It should be noted that semi-circular holes are provided on both the upper block 48 and the lower block 49. After the upper block 48 and the lower block 49 are fastened by screws, a circular inner hole is formed. The slider combination 16 slides in the sliding groove 17. Taking the assembly of the first support shaft 29 and the slider combination 16 as an example, the first support shaft 29 passes through the circular inner hole, and the slider combination 16 is placed in the sliding groove 17. The slider combination 16 restricts the moving frame 6 to move up and down only along the longitudinal direction, achieving the purpose of changing the position of the compaction block 36.

[0050] In the rigid strength and durability test device for an automobile seat backrest of this embodiment, please refer to Figures 1 to 4 , Figure 8 and Figure 10 , the periodic voltage regulating mechanism includes a first periodic voltage regulating mechanism. The first periodic voltage regulating mechanism includes a voltage regulating gear 33 and an end face cam 34 that are meshed with each other. The voltage regulating gear 33 is in transmission connection with the first periodic voltage regulating driving component. The end face cam 34 is arranged on the moving frame 6. The spherical plain bearing 41 penetrates through the end face cam 34 and is connected to the compaction block 36. Thrust cylindrical roller bearings are arranged between the end face cam 34 and the moving frame 6 and between the end face cam 34 and the compaction block 36.

[0051] Specifically, the front and rear end faces of the end face cam 34 have one side being a plane perpendicular to the axis and the other side being an inclined plane with an angle to the axis, and a gear is provided on the outer circumferential surface of the end face cam 34. A first cylindrical roller bearing 35 is provided between the front end face of the end face cam 34 and the compacting block seat 37, and a second cylindrical roller bearing 38 is provided on the rear end face, and the end face cam 34 is fixed to the moving frame 6 through the cylindrical roller bearing seat.

[0052] It should be noted that after the first cycle of pressure regulating drive assembly operation, the pressure regulating gear 33 and the end face cam 34 are driven to rotate synchronously, and the compacting block 36 is driven to rotate around the center of the spherical joint bearing 41. At the same time, the compacting block 36 moves axially back and forth within the circumferential range, and the circumferential pressure changes within the contact area between the compacting block 36 and the car seat back, thereby realizing the first variable pressure compaction of the car seat back.

[0053] Preferably, the first periodic pressure regulation drive assembly includes a first servo motor 31 and a first servo motor reducer 32 in transmission connection. The first servo motor 31 controls the circumferential pressure change time period, and at the same time, by adjusting the speed of the first servo motor 31, the durability test of non-periodic pressure change is realized.

[0054] In the present embodiment, the vehicle seat back rigidity strength durability test device is shown in FIG. Figures 1 to 10 ,as well as Figure 14 The periodic pressure regulating mechanism includes a second periodic pressure regulating mechanism, and the second periodic pressure regulating mechanism includes a cylindrical groove cam 60 and a needle bearing roller 39. The cylindrical groove cam 60 is transmission-connected to the second periodic pressure regulating driving assembly. The cylindrical groove cam 60 is arranged on the rotating frame 5. The needle bearing roller 39 is rotatably arranged inside the wheel groove of the cylindrical groove cam 60, and the needle bearing roller 39 is connected to the movable frame 6.

[0055] Specifically, the front end surface of the cylindrical groove cam 60 is provided with a first angular contact cylindrical roller bearing 62, and the rear end surface thereof is provided with a second angular contact cylindrical roller bearing 59; the first angular contact cylindrical roller bearing 62 and the second angular contact cylindrical roller bearing 59 are installed in the angular contact cylindrical roller bearing seat 61 of the rotating frame 5. The middle part of the mobile frame 6 is provided with a mounting plate for the needle bearing roller 39 and the needle bearing roller seat assembly that drives the swing thereof, and a pressure sensor 40 is provided between the needle bearing roller seat assembly and the mounting plate, and the needle bearing roller 39 can roll inside the wheel groove of the cylindrical groove cam 60.

[0056] It should be noted that the cylindrical groove cam 60 is driven to rotate by the second periodic pressure regulating driving assembly, and then the needle bearing roller 39 is driven to swing back and forth, so that the moving frame 6 can swing back and forth synchronously around the second supporting shaft 30, and the compacting block 36 can be provided with pressure of varying magnitude, so as to realize the second variable pressure compaction of the car seat back. At the same time, the reaction force of the test pressure of the car seat back is borne by the first angular contact cylindrical roller bearing 62 and the second angular contact cylindrical roller bearing 59.

[0057] Preferably, the second periodic pressure regulation driving assembly includes a second servo motor 56 and a second servo motor reducer 57 in transmission connection, the second servo motor reducer 57 is connected to the cylindrical groove cam 60 through a coupling 58, and the second servo motor reducer 57 is connected to the angular contact cylindrical roller bearing seat 61. The second servo motor 56 controls the swing period of the moving frame 6, and at the same time, by adjusting the rotation speed of the second servo motor 56, the durability test of the non-periodic variable pressure is realized.

[0058] In the present embodiment, the vehicle seat back rigidity strength durability test device is shown in FIG. Figures 1 to 11 A locking seat body 43 is provided on the rotating frame 5, and a clearance groove is formed on the locking seat body 43 for the toothed disc 13 to be embedded. Locking brake components are provided inside the locking seat body 43 and on both sides of the toothed disc 13.

[0059] Specifically, the locking brake assembly includes a tension type electromagnetic switch 42, a normally closed locking pressure spring 44, a movable shaft core 45 and a brake pad 46, wherein the tension type electromagnetic switch 42 is connected and fixed to the movable shaft core 45, the movable shaft core 45 is connected and fixed to the brake pad 46, and the normally closed locking pressure spring 44 is sleeved on the outer circumferential surface of the movable shaft core 45; the tension type electromagnetic switch 42 is installed on the locking seat body 43 through its own thread. A toothed disc locking position 47 is provided on the toothed disc 13, and the toothed disc locking position 47 is embedded in the clearance groove.

[0060] It should be noted that, in the test state, the left and right tension-type electromagnetic switches 42 are powered off, and the left and right normally closed locking pressure springs 44 push the movable shaft core 45 and the brake pads 46 to press the gear disc locking position 47, so that the rotating frame 5 cannot swing and is fixed at a tilt angle position; when the tilt angle of the rotating frame 5 needs to be changed, the left and right tension-type electromagnetic switches 42 are powered on, the movable shaft core 45 is retracted, the left and right normally closed locking pressure springs 44 are compressed, the brake pads 46 leave the gear disc locking position 47, and the locking brake assembly is unlocked. After the tilt angle adjustment of the rotating frame 5 is completed, the left and right tension-type electromagnetic switches 42 are powered off again, and the locking brake assembly is locked.

[0061] In addition, a third servo motor 21 is provided on the rotating frame 5. A servo motor gear 18 is provided at the output end of the third servo motor 21. The servo motor gear 18 meshes with the arc gear on the tooth disc 13. After the pull-type electromagnetic switch 42 is powered on, the third servo motor 21 drives the servo motor gear 18 to rotate, and the rotating frame 5 rotates around the second support shaft 30. According to the tilt angle of the car seat backrest, the compaction block 36 is adjusted to a suitable position; when the pull-type electromagnetic switch 42 is powered off, the rotating frame is in this angular position.

[0062] In the rigid strength and durability test device for the car seat backrest of this embodiment, please refer to Figures 1 to 5 and Figure 13 、 Figure 14 The test bench 3 is provided with an installation position 1 and a test position 2. The platform 4 can move between the installation position 1 and the test position 2. By separating the installation position 1 and the test position 2, it is beneficial to the safety and operation convenience of the testers.

[0063] Specifically, the platform 4 is driven by the seat drive assembly 15 to move back and forth. The seat drive assembly 15 is installed on the test bench 3 through the fixed support 14. Preferably, the seat drive assembly 15 adopts a combined structure of a servo motor and a reducer. A platform slider 51 is provided below the platform 4, and a platform slide rail 50 slidably connected to the platform slider 51 is provided on the test bench 3. A seat support platform 52 is provided above the platform 4, and a connecting block 53 is provided above the seat support platform 52. A platform moving drive trapezoidal lead screw 54 is provided at the output end of the seat drive assembly 15, and a trapezoidal lead screw sleeve 55 is provided on the seat support platform 52.

[0064] It should be noted that in the preparatory work before the test, the platform 4 is moved to the installation position 1, and then the car seat to be tested is installed. Four support connecting blocks 7 are used to connect and fasten the slide rail of the car seat body and the connecting block 53 with screws. A pressing block is used to compact the connecting block 53, and the pressing block is connected and fastened to the seat support platform 52 with screws; then, the seat drive assembly 15 and the platform moving drive trapezoidal lead screw 54 drive the platform 4 to move to the test position 2.

[0065] The above has made a detailed description of the present invention. The above description is only a preferred embodiment of the present invention, and the scope of implementation of the present invention cannot be limited. That is, all equal changes and modifications made according to the scope of this application should still fall within the scope covered by the present invention.

Claims

1. A vehicle seat back rigidity strength durability testing device, characterized in that: include: A test bench, wherein the test bench is provided with a platform for installing a car seat; A pressure mechanism, which is used to apply a force to the backrest of the automobile seat, wherein the pressure mechanism is arranged on a mobile frame, and the bottom of the mobile frame is hinged to the test bench; A rotating mechanism, comprising a rotating frame and an arc-shaped toothed disc, wherein the toothed disc is connected to the test bench, the moving frame is arranged inside the rotating frame, and the moving frame can slide relative to the rotating frame to change the position of the pressure mechanism, and the rotating frame rotates around the hinge between the moving frame and the test bench and along the toothed disc; And a periodic pressure regulating mechanism is transmission-connected with the pressure applying mechanism to enable the pressure applying mechanism to apply variable forces to different positions of the automobile seat backrest.

2. The vehicle seat back rigidity strength durability testing device according to claim 1, characterized in that: The pressure mechanism includes a compacting block and a joint bearing, wherein the joint bearing is arranged on the moving frame and connected to the compacting block.

3. The vehicle seat back rigidity strength durability testing device according to claim 1, characterized in that: The top and bottom of the movable frame are both provided with support shafts extending to the outside of the body thereof, the rotating frame is provided with a long sliding groove for the support shaft to pass through, and the support shaft at the bottom of the movable frame is hinged to the test bench.

4. The vehicle seat back rigidity strength durability testing device according to claim 3, characterized in that: The rotating frame is also provided with a moving frame driving assembly, and the moving frame driving assembly is drivingly connected with the moving frame to drive the supporting shaft to slide inside the sliding groove.

5. The vehicle seat back rigidity strength durability testing device according to claim 3, characterized in that: A slider assembly is arranged inside the sliding groove, and the slider assembly includes an upper block and a lower block that are interlocked with each other, and the support shaft passes through the inner hole of the slider assembly.

6. The vehicle seat back rigidity strength durability testing device according to claim 2, characterized in that: The periodic pressure regulating mechanism includes a first periodic pressure regulating mechanism, the first periodic pressure regulating mechanism includes a meshing pressure regulating gear and an end face cam, the pressure regulating gear is transmission-connected with the first periodic pressure regulating driving assembly, the end face cam is arranged on the moving frame, and the joint bearing passes through the end face cam and is connected with the compacting block; The end face cam is driven to rotate by the first periodic pressure regulating driving assembly, and the compacting block applies variable force to test different positions of the car seat back, thereby achieving the first variable pressure compaction of the car seat back.

7. A vehicle seat back rigidity strength durability testing device according to claim 1 or 6, characterized in that: The periodic pressure regulating mechanism includes a second periodic pressure regulating mechanism, the second periodic pressure regulating mechanism includes a cylindrical groove cam and a needle bearing roller, the cylindrical groove cam is transmission-connected to the second periodic pressure regulating driving assembly, the cylindrical groove cam is arranged on the rotating frame, the needle bearing roller is rotatably arranged inside the wheel groove of the cylindrical groove cam, and the needle bearing roller is connected to the moving frame; The needle bearing roller is driven to move forward and backward through the second periodic pressure regulating driving assembly, and the moving frame is driven to swing forward and backward synchronously, so as to realize the second variable pressure to compact the car seat back.

8. The vehicle seat back rigidity strength durability testing device according to claim 7, characterized in that: A pressure sensor is arranged between the needle bearing roller and the moving frame.

9. The vehicle seat back rigidity strength durability testing device according to claim 1, characterized in that: The rotating frame is provided with a locking seat body, the locking seat body is provided with a clearance groove for the toothed disc to be inserted, and locking brake components are provided inside the locking seat body and on both sides of the toothed disc.

10. The vehicle seat back rigidity strength durability testing device according to claim 1, characterized in that: The test bench is provided with an installation position and a test position, and the platform can move between the installation position and the test position.

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