Automobile seat multi-point alternating pressure durability testing device

Abstract

The utility model relates to a multi-point alternating pressure durability testing device for an automobile seat, which belongs to the technical field of automobile seat testing devices and comprises a testing table and an alternating pressure testing mechanism. The alternating pressure testing mechanism comprises a leg alternating pressure testing unit, a hip alternating pressure testing unit and a back alternating pressure testing unit, the hip alternating pressure testing unit can move up and down in the vertical direction, and the leg alternating pressure testing unit can swing up and down in the vertical direction around a first swing point; the back alternating pressure test unit can rotate around the second swing point and in the vertical plane, and the first swing point and the second swing point are both located on the motion path of the hip alternating pressure test unit. And the test mechanism occupies a large area and is difficult to meet the actual production requirements.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile seat test devices, in particular to an automobile seat multi-point alternating pressure durability test device. Background Art

[0002] Strength test is an important basis for assessing the comprehensive performance indicators of automobile seats. According to "GB11550-2009 Strength requirements and test methods for automobile seat headrests" and "GB15083-2006 Strength requirements and test methods for automobile seats, seat fixing devices and headrests", for automobile seats to be shipped out of the factory, the main test objects are automobile seat backs, headrests and seat cushions. There are many achievements in this regard in the prior art field, for example: Application No. ZL200820038784.7, named Automobile Seat Comprehensive Strength Tester, the test bench uses two hydraulic cylinders as loading sources, which can realize the test of automobile seat backs and seat cushions; using an impact hammer as a headrest impact device, it can realize the headrest impact test. The limitations of this test machine are that the pressure form of the seat is not comprehensive, the movement amplitude and strength of the loading source are single, and the test mechanism occupies a large area, which is difficult to meet the actual production needs. Summary of the invention

[0003] In view of the various shortcomings of the prior art and in order to solve the above-mentioned problems, a multi-point alternating pressure durability test device for automobile seats is proposed to solve the technical problems that the prior art has incomplete pressure forms for seats, single movement amplitude and force of the loading source, large footprint of the test mechanism, and difficulty in meeting actual production needs.

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

[0005] A multi-point alternating pressure durability testing device for automobile seats, comprising:

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

[0007] And an alternating pressure testing mechanism, which has an adjustable distance from the test bench, the alternating pressure testing mechanism includes a leg alternating pressure testing unit, a buttocks alternating pressure testing unit and a back alternating pressure testing unit, the buttocks alternating pressure testing unit can move up and down in the vertical direction, the leg alternating pressure testing unit can swing up and down in the vertical direction around a first swing point, the back alternating pressure testing unit can rotate in a vertical plane around a second swing point, and the first swing point and the second swing point are both located on the movement path of the buttocks alternating pressure testing unit.

[0008] The technical solution is further configured to include a mobile frame for installing an alternating pressure testing mechanism, wherein the mobile frame can slide along a vertical direction to change the distance between the mobile frame and the testing bench, and the alternating pressure testing mechanism is symmetrically arranged on both sides of the mobile frame.

[0009] The technical solution is further configured such that the alternating pressure testing mechanisms symmetrically arranged on both sides of the mobile frame are independent of each other.

[0010] The technical solution is further configured to further include a lifting frame, which is slidably connected to the moving frame and the test bench respectively, and the lifting frame can slide along the vertical direction.

[0011] The technical solution is further configured as follows: the buttocks alternating pressure test unit is provided at the rear end of the mobile frame, and the mobile frame is also provided with a leg alternating pressure shaft support as a first swing point and a back alternating pressure swing frame support as a second swing point, the leg alternating pressure test unit is located at the front end of the mobile frame and is hinged to the leg alternating pressure shaft support, and the back alternating pressure test unit is located between the leg alternating pressure test unit and the buttocks alternating pressure test unit, and is hinged to the back alternating pressure swing frame support.

[0012] The technical solution is further configured that the alternating pressure testing mechanism also includes a power unit, the power unit includes a first power source and a cam transmission connected to the first power source, the leg alternating pressure testing unit, the buttocks alternating pressure testing unit and the back alternating pressure testing unit are respectively transmission connected to the edge of the cam.

[0013] The technical solution is further configured such that the leg alternating pressure test unit includes a first reset spring and a leg alternating pressure swing frame, one end of the leg alternating pressure swing frame is hinged to the leg alternating pressure shaft support, and the other end thereof serves as a free end and is transmission-connected to the edge of the cam, and the two ends of the first reset spring are respectively connected to the movable frame and the free end of the leg alternating pressure swing frame.

[0014] The technical solution is further configured as follows: the buttocks alternating pressure test unit includes a core shaft and a buttocks pressure basin, the core shaft can move up and down along the movable frame, the top of the core shaft is transmission-connected to the edge of the cam, the bottom of the core shaft is connected to the buttocks pressure basin, and the outer sleeve of the core shaft is provided with a second return spring.

[0015] The technical solution is further configured as follows: the back alternating pressure testing unit includes a back alternating pressure swing frame and an angle adjustment frame, the back alternating pressure swing frame is linked with the angle adjustment frame, and both are hinged to the back alternating pressure swing frame support, the angle adjustment frame is connected to the edge of the cam by transmission, and a third return spring is arranged between the angle adjustment frame and the movable frame.

[0016] The technical solution is further configured such that the angle adjustment frame is provided with an adjustment gear transmission-connected to the second power source, and the adjustment gear is meshed with an arc-shaped rack on the back alternating pressure swing frame to adjust the pitch angle of the angle adjustment frame.

[0017] The beneficial effects of the utility model are:

[0018] By setting up a leg alternating pressure test unit, a buttocks alternating pressure test unit and a back alternating pressure test unit, pressure tests are performed on the legs, buttocks and back of the seat respectively; the pressure form of the leg alternating pressure test unit is not a vertical downward and upward reciprocating motion, but a motion form of simulating the up and down swinging of human legs with the first swing point as the center of the circle, which is close to the actual state of seat use; the buttocks alternating pressure test unit reciprocates up and down, simulating the motion form of the human buttocks compressing the seat, which is close to the actual state of seat use; the back alternating pressure test unit automatically rotates to adjust the angle, which can adapt to the pressure test needs of any tilt angle of the car seat backrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of a multi-point alternating pressure durability testing device for a car seat in an embodiment of the utility model;

[0020] Figure 2 It is a front view of the movable frame in the embodiment of the utility model rising to the highest position;

[0021] Figure 3 This is a front view of the lifting frame in the embodiment of the utility model;

[0022] Figure 4 It is a front view of the mobile frame in the embodiment of the utility model;

[0023] Figure 5 It is a side view of the leg alternating pressure test unit in the embodiment of the utility model;

[0024] Figure 6 It is a side view of the back alternating pressure test unit in the embodiment of the utility model;

[0025] Figure 7 It is a side view of the buttocks alternating pressure test unit in the embodiment of the utility model;

[0026] Figure 8 It is a front view of the leg alternating pressure test unit in the embodiment of the utility model in a downward pressure state;

[0027] Fig. 9 It is a front view of the back alternating pressure test unit in the embodiment of the utility model in a downward pressure state;

[0028] Fig.10 It is a front view of the buttocks alternating pressure test unit in the embodiment of the utility model in a downward pressure state;

[0029] In the attached figure: 1, installation position; 2, test position; 3, test bench; 4, platform; 5, lifting frame; 6, mobile frame; 7, leg alternating pressure test unit; 8, buttocks alternating pressure test unit; 9, back alternating pressure test unit; 10, first slider; 11, first slide rail; 12, fixed plate; 13, cylinder fixed plate; 14, fixed stroke lifting cylinder; 15, worm reducer; 16, trapezoidal lead screw sleeve; 17, trapezoidal lead screw; 18, second slider; 19, second slide rail; 20, third slide rail; 21, third slider; 22, connecting plate; 23, vertical plate; 24, cam motor support plate; 26, tension hook seat; 27, pressure sensor; 28, pressure spring seat; 29, middle vertical plate; 30, upper sliding sleeve fixed plate; 31, sliding sleeve; 32, lower sliding sleeve fixed plate; 33, leg alternating pressure shaft support; 34, Cam support; 35. Cam; 36. Deep groove ball bearing; 37. Coupling; 38. First power source; 39. First needle bearing roller; 40. Slide rail fixing plate; 41. Fourth slider; 42. Fourth slide rail; 43. Pressure rod; 44. Leg alternating pressure swing frame; 45. Third needle bearing roller; 46. Back alternating pressure swing frame; 47. Second power source; 48. Adjusting gear; 49. Back alternating pressure swing frame support shaft; 50. Back alternating pressure swing frame support; 51. Support; 52. Second needle bearing roller; 53. Upper pressure plate; 54. Second return spring; 55. Mandrel; 56. Leg pressure basin; 57. Leg alternating pressure rotating shaft; 58. First return spring; 59. Lever; 60. Third return spring; 61. Back pressure basin; 62. Buttocks pressure basin; 63. Angle adjustment frame; 64. Lower pressure plate. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the creation of the present invention.

[0031] According to the embodiment of the utility model, a multi-point alternating pressure durability test device for a car seat is provided. Figure 1 , Figure 2 , including a test bench 3 and an alternating pressure testing mechanism, the test bench 3 is provided with a platform 4 for installing a car seat; the distance between the alternating pressure testing mechanism and the test bench 3 is adjustable, the alternating pressure testing mechanism includes a leg alternating pressure testing unit 7, a buttocks alternating pressure testing unit 8 and a back alternating pressure testing unit 9, the buttocks alternating pressure testing unit 8 can move up and down in the vertical direction, the leg alternating pressure testing unit 7 can swing up and down in the vertical direction around a first swing point, the back alternating pressure testing unit 9 can rotate in a vertical plane around a second swing point, and the first swing point and the second swing point are both located on the movement path of the buttocks alternating pressure testing unit 8.

[0032] It should be noted that, by setting up the leg alternating pressure test unit 7, the buttocks alternating pressure test unit 8 and the back alternating pressure test unit 9, the legs, buttocks and back of the seat are pressure tested respectively; the pressure form of the leg alternating pressure test unit 7 is not a vertical downward and upward reciprocating motion, but a motion form of simulating the up and down swinging of the human legs with the first swing point as the center of the circle, which is close to the actual state of seat use; the buttocks alternating pressure test unit 8 reciprocates up and down, simulating the motion form of the human buttocks compressing the seat, which is close to the actual state of seat use; the back alternating pressure test unit 9 automatically rotates to adjust the angle, which can adapt to the pressure test requirements of any tilt angle of the car seat backrest.

[0033] Specifically, the test bench 3 is provided with a mounting position 1 and a test position 2, and the platform 4 can move between the mounting position 1 and the test position 2. By separating the mounting position 1 and the test position 2, it is beneficial to the safety and convenience of the tester. At the same time, a servo motor, a reducer and a screw combination structure are used to drive the platform 4 to move.

[0034] In the vehicle seat multi-point alternating pressure durability test device of this embodiment, please refer to Figures 1 to 4, and also includes a mobile frame 6 for installing an alternating pressure testing mechanism, wherein the mobile frame 6 can slide in a vertical direction to change the distance between it and the testing platform 3 , and the alternating pressure testing mechanism is symmetrically arranged on both sides of the mobile frame 6 .

[0035] It should be noted that the movable frame 6 is provided to uniformly adjust the pressure applied by the alternating pressure testing mechanism to the vehicle seat as a whole.

[0036] In the vehicle seat multi-point alternating pressure durability test device of this embodiment, please refer to Figures 1 to 4 The alternating pressure testing mechanisms symmetrically arranged on both sides of the mobile frame 6 are independent of each other.

[0037] It should be noted that the alternating pressure test mechanism is symmetrical on the whole, simulating the legs, buttocks and back of the human body respectively. There are two test locations on the legs, buttocks and back at the corresponding positions of the car seat, for a total of 6 test locations. At the same time, the two symmetrical alternating pressure test mechanisms are independent of each other, and the tests on different parts of the car seat can be controlled synchronously or separately without interfering with each other, which is close to the actual use conditions of the car seat.

[0038] In the vehicle seat multi-point alternating pressure durability test device of this embodiment, please refer to Figures 1 to 4 , and also includes a lifting frame 5, which is slidably connected to the moving frame 6 and the test bench 3 respectively, and the lifting frame 5 can slide along the vertical direction.

[0039] Specifically, the lifting frame 5 is connected to the fixed plate 12 through the first slider 10 and the first slide rail 11, and the fixed plate 12 is connected to the test bench 3; the cylinder body end of the fixed stroke lifting cylinder 14 is fixed on the cylinder fixed plate 13, and the cylinder fixed plate 13 is connected to the test bench 3; the rod head end of the fixed stroke lifting cylinder 14 is connected and fixed to the top of the moving frame 6; the moving frame 6 is connected to the lifting frame 5 through the second slider 18, the second slide rail 19, the third slide rail 20 and the third slider 21.

[0040] It should be noted that the push rod of the fixed stroke lifting cylinder 14 is retracted to raise the lifting frame 5, leaving space for the installation of the car seat. Figure 2 ; After the car seat is installed, the push rod of the fixed stroke lifting cylinder 14 is extended to the maximum stroke, the lifting frame 5 is lowered, and the lifting frame 5 drives the moving frame 6 to descend synchronously; the alternating pressure test mechanism is pressed on the car seat, please refer to Figure 1 .

[0041] Specifically, a servo motor worm gear reducer mechanism is provided on the lifting frame 5, and the initial pressure of the alternating pressure testing mechanism contacting the surface of the car seat as a whole is automatically adjusted by the servo motor worm gear reducer mechanism; when the moving frame 6 moves downward, the static pressure applied by the alternating pressure testing mechanism on the surface of the car seat increases; otherwise, it decreases.

[0042] Preferably, the servo motor worm gear reducer mechanism includes a servo motor, a turbine worm reducer 15, a trapezoidal screw sleeve 16 and a trapezoidal screw 17. The turbine worm reducer 15 is transmission-connected to the trapezoidal screw 17. The trapezoidal screw sleeve 16 is sleeved on the periphery of the trapezoidal screw 17. At the same time, the trapezoidal screw sleeve 16 is connected to the connecting plate 22, and the connecting plate 22 is connected to the top of the mobile frame 6. At the same time, a pressure sensor 27 is arranged between the connecting plate 22 and the top of the mobile frame 6. A servo motor is arranged to drive the worm gear reducer 15, and the worm output shaft is connected to the upper end of the trapezoidal screw 17 through a coupling to transmit torque. After the trapezoidal screw 17 adjusts the height of the mobile frame 6, the value of the pressure sensor 27 is read, and the value is multiplied by 2, which is the pressure value applied by the mobile frame 6 to the car seat.

[0043] In the vehicle seat multi-point alternating pressure durability test device of this embodiment, please refer to Figures 1 to 4 The buttocks alternating pressure test unit 8 is arranged at the rear end of the mobile frame 6, and the mobile frame 6 is also provided with a leg alternating pressure shaft support 33 as a first swing point and a back alternating pressure swing frame support 50 as a second swing point. The leg alternating pressure test unit 7 is located at the front end of the mobile frame and is hinged to the leg alternating pressure shaft support 33. The back alternating pressure test unit 9 is located between the leg alternating pressure test unit 7 and the buttocks alternating pressure test unit 8 and is hinged to the back alternating pressure swing frame support 50.

[0044] It should be noted that the movable frame 6 is configured as a welded frame consisting of a vertical plate 23, a cam motor support plate 24 and an intermediate vertical plate 29, and the leg alternating pressure shaft support 33 and the back alternating pressure swing frame support 50 are connected and fixed to the intermediate vertical plate 29, wherein the leg alternating pressure shaft support 33 is located at the bottom of the intermediate vertical plate 29, that is, the leg alternating pressure shaft support 33 is arranged close to the buttocks of the human body on the car seat, and the back alternating pressure swing frame support 50 is located above the leg alternating pressure shaft support 33.

[0045] In the vehicle seat multi-point alternating pressure durability test device of this embodiment, please refer to Figures 1 to 5The alternating pressure testing mechanism also includes a power unit, which includes a first power source 38 and a cam 35 transmission-connected to the first power source 38, and the leg alternating pressure testing unit 7, the buttocks alternating pressure testing unit 8 and the back alternating pressure testing unit 9 are respectively transmission-connected to the edge of the cam 35.

[0046] It should be noted that the cam support 34 is fixed on the cam motor support plate 24 and the middle vertical plate 29, and the cam 35 is installed in the middle of the cam support 34 through a deep groove ball bearing 36; a coupling 37 and a first power source 38 are installed on the outer side of the cam motor support plate 24. Preferably, the first power source 38 adopts a servo motor reducer. The leg alternating pressure test unit 7, the buttocks alternating pressure test unit 8 and the back alternating pressure test unit 9 are integrated on the mobile frame 6, with a compact structure and a small size. At the same time, after the first power source 38 is running, it drives the cam 35 to rotate, and then drives the leg alternating pressure test unit 7, the buttocks alternating pressure test unit 8 and the back alternating pressure test unit 9 to be linked.

[0047] In the vehicle seat multi-point alternating pressure durability test device of this embodiment, please refer to Figures 1 to 5 , Figure 7 as well as Figure 8 The leg alternating pressure test unit 7 includes a first reset spring 58 and a leg alternating pressure swing frame 44, one end of the leg alternating pressure swing frame 44 is hinged to the leg alternating pressure shaft support 33, and the other end thereof serves as a free end and is transmission-connected to the edge of the cam 35, and the two ends of the first reset spring 58 are respectively connected to the free ends of the movable frame 6 and the leg alternating pressure swing frame 44.

[0048] Specifically, the fourth slide rail 42 is connected and fixed to the slide rail fixing plate 40, and the slide rail fixing plate 40 is connected and fixed to the middle vertical plate 29; the fourth slider 41 is connected and fixed to the pressure rod 43; the first needle roller bearing roller 39 is installed at both ends of the pressure rod 43, the first needle roller bearing roller 39 located at the top of the pressure rod 43 contacts and is transmission-connected to the edge of the cam 35, and the first needle roller bearing roller 39 located at the bottom of the pressure rod 43 contacts and is transmission-connected to the leg alternating pressure swing frame 44; the leg alternating pressure shaft 57 is installed on the leg alternating pressure shaft support 33, and the leg alternating pressure swing frame 44 is installed on the leg alternating pressure shaft 57; the first return spring 58 connects the tension hook seat 26 and the leg alternating pressure swing frame 44, and the tension hook seat 26 is connected and fixed to the movable frame 6; the leg pressure basin 56 is connected and fixed to the bottom of the leg alternating pressure swing frame 44.

[0049] It should be noted that the cam 35 is driven to rotate by the first power source 38, and the cam 35 pushes the first needle bearing roller 39, and the first needle bearing roller 39 drives the pressure rod 43 to move up and down, and the first needle bearing roller 39 at the bottom of the pressure rod 43 pushes the leg alternating pressure swing frame 44 to swing up and down around the leg alternating pressure shaft support 33, forming an alternating leg pressure test on the seat pot of the car seat; the pressure rod 43 is connected to the slide rail fixing plate 40 through the slider slide rail structure, and can only move up and down. The leg alternating pressure test unit 7 located on both sides of the mobile frame 6 is separated from the left and right, tested separately, and reset by the first reset spring 58; the pressure test change cycle on the left and right sides can be the same or different, and do not affect each other; in particular, the pressure form of the leg position on both sides of the seat pot of the car seat is not a vertical downward and upward reciprocating motion, but with the leg alternating pressure shaft support 33 as the center of the circle, simulating the movement form of the human leg swinging up and down, which is close to the actual state of the seat use.

[0050] In the vehicle seat multi-point alternating pressure durability test device of this embodiment, please refer to Figures 1 to 5 , Figure 7 as well as Figure 8 The hip alternating pressure test unit 8 includes a core shaft 55 and a hip pressure basin 62. The core shaft 55 can move up and down along the movable frame 6. The top of the core shaft 55 is transmission-connected to the edge of the cam 35, and the bottom of the core shaft 55 is connected to the hip pressure basin 62. The outer sleeve of the core shaft 55 is provided with a second return spring 54.

[0051] Specifically, the support 51 is connected and fixed to the middle vertical plate 29, and the lever 59 is installed on the support shaft of the support 51; the second needle bearing roller 52 is installed in the mounting holes at both ends of the lever 59; the sleeve 31 is installed in the positioning holes of the upper sleeve fixing plate 30 and the lower sleeve fixing plate 32, and the core shaft 55 passes through the sleeve 31, and the upper sleeve fixing plate 30, the lower sleeve fixing plate 32 are connected and fixed to the middle vertical plate 29; the second return spring 54 is placed between the upper pressure plate 53 and the upper sleeve fixing plate 30, and the core shaft 55 passes through the second return spring 54; the two ends of the core shaft 55 are respectively connected and fixed to the upper pressure plate 53 and the lower pressure plate 64, and the lower pressure plate 64 is connected and fixed to the hip pressure basin 62.

[0052] It should be noted that the cam 35 is driven to rotate by the first power source 38, and the cam 35 pushes the second needle bearing roller 52 at the left end of the lever 59, thereby driving the lever 59 to swing up and down, and the second needle bearing roller 52 at the right end of the lever 59 pushes the upper pressure plate 53, the core shaft 55, the lower pressure plate 64 and the hip pressure basin 62 to move up and down as a whole, forming an alternating hip pressure test on the seat basin of the car seat; the core shaft 55 cooperates with the sliding sleeve 31 and can only move up and down. The hip alternating pressure test unit 8 located on both sides of the mobile frame 6 is separated from the left and right, tested separately, and reset by the second reset spring 54; the pressure test change cycle on the left and right sides can be the same or different, and do not affect each other; the variable pressure is transmitted through the cam lever mechanism, and the compression core shaft 55 reciprocates up and down; the movement form of simulating the human hip compressing the car seat is close to the actual state of the car seat.

[0053] In the vehicle seat multi-point alternating pressure durability test device of this embodiment, please refer to Figures 1 to 10 The back alternating pressure test unit 9 includes a back alternating pressure swing frame 46 and an angle adjustment frame 63. The back alternating pressure swing frame 46 is linked with the angle adjustment frame 63, and both are hinged to the back alternating pressure swing frame support 50. The angle adjustment frame 63 is connected to the edge of the cam 35 by transmission, and a third reset spring 60 is arranged between the angle adjustment frame 63 and the movable frame 6.

[0054] Specifically, the back alternating pressure swing frame support 50 is connected and fixed to the lower sliding sleeve fixing plate 32, and the back alternating pressure swing frame support shaft 49 is installed on the back alternating pressure swing frame support 50; the back alternating pressure swing frame 46 and the angle adjustment frame 63 are installed on the back alternating pressure swing frame support shaft 49; the back pressure basin 61 is connected and fixed to the back alternating pressure swing frame 46; the third return spring 60 is installed in the pressure spring seat 28, and the third return spring 60 supports the angle adjustment frame 63; the third needle bearing roller 45 is arranged on the angle adjustment frame 63, and the third needle bearing roller 45 is connected to the edge of the cam 35 in a transmission manner, and the third return spring 60 and the cam 35 are located on different sides of the third needle bearing roller 45; the back pressure basin 61 is a square plastic shell, the corner is a large arc surface, and the bottom contact surface is a spherical arc surface.

[0055] It should be noted that the cam 35 is driven to rotate by the power unit composed of the deep groove ball bearing 36, the coupling 37 and the first power source 38, and the cam 35 pushes the third needle bearing roller 45 at the left end of the angle adjustment frame 63, and the third needle bearing roller 45 drives the angle adjustment frame 63 to swing left and right around the back alternating pressure swing frame support shaft 49 at the right end of the angle adjustment frame 63, and the angle adjustment frame 63 drives the back alternating pressure swing frame 46 to swing at the same time, and the back pressure basin 61 connected and fixed to the back alternating pressure swing frame 46 contacts the seat back and implements the alternating pressure test. The back alternating pressure test units 9 located on both sides of the moving frame 6 are separated from each other and tested separately, and reset by the third reset spring 60; the pressure test change cycles on the left and right sides can be the same or different, and do not affect each other; in particular, the pressure application form on the seat back position is not up and down reciprocating motion, but with the back alternating pressure swing frame support 50 as the center of the circle, simulating the movement form of the human back swinging back and forth, which is close to the actual state of the use of the car seat.

[0056] In the vehicle seat multi-point alternating pressure durability test device of this embodiment, please refer to Figures 1 to 10 The angle adjustment frame 63 is provided with an adjustment gear 48 which is transmission-connected to the second power source 47 . The adjustment gear 48 is meshed with the arc-shaped rack on the back alternating pressure swing frame 46 to adjust the pitch angle of the angle adjustment frame 63 .

[0057] Specifically, the adjustment gear 48 is installed at the output end of the second power source 47, the second power source 47 is installed on the angle adjustment frame 63, and the adjustment gear 48 is meshed with the arc-shaped rack on the back alternating pressure swing frame 46. Preferably, the second power source 47 adopts a servo motor worm reducer.

[0058] It should be noted that when the angle of the car seat back changes, or the inclination angle of the back alternating pressure swing frame 46 needs to be adjusted, the second power source 47 drives the adjusting gear 48 to rotate, and the adjusting gear 48 engages with the arc-shaped rack of the back alternating pressure swing frame 46. The adjusting gear 48 drives the back alternating pressure swing frame 46 and the back pressure basin 61 to swing around the back alternating pressure swing frame support shaft 49 until the inclination angle is adjusted to a suitable angle. The second power source 47 is a servo motor reducer structure with a self-locking function. When the servo motor stops running, it can ensure that the angle of the back alternating pressure swing frame 46 relative to the angle adjustment frame 63 remains unchanged.

[0059] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A multi-point alternating pressure durability test device for automobile seats, characterized in that: include: A test bench, wherein the test bench is provided with a platform for installing a car seat; And an alternating pressure testing mechanism, which has an adjustable distance from the test bench, the alternating pressure testing mechanism includes a leg alternating pressure testing unit, a buttocks alternating pressure testing unit and a back alternating pressure testing unit, the buttocks alternating pressure testing unit can move up and down in the vertical direction, the leg alternating pressure testing unit can swing up and down in the vertical direction around a first swing point, the back alternating pressure testing unit can rotate in a vertical plane around a second swing point, and the first swing point and the second swing point are both located on the movement path of the buttocks alternating pressure testing unit.

2. The multi-point alternating pressure durability testing device for automobile seats according to claim 1, characterized in that: It also includes a mobile frame for installing an alternating pressure testing mechanism, the mobile frame can slide along the vertical direction to change the distance between it and the test bench, and the alternating pressure testing mechanism is symmetrically arranged on both sides of the mobile frame.

3. The multi-point alternating pressure durability testing device for automobile seats according to claim 2, characterized in that: The alternating pressure testing mechanisms symmetrically arranged on both sides of the mobile frame are independent of each other.

4. The multi-point alternating pressure durability testing device for automobile seats according to claim 2, characterized in that: It also includes a lifting frame, which is slidably connected to the moving frame and the test bench respectively, and the lifting frame can slide along the vertical direction.

5. The vehicle seat multi-point alternating pressure durability testing device according to claim 3, characterized in that: The buttocks alternating pressure test unit is arranged at the rear end of the mobile frame, and the mobile frame is also provided with a leg alternating pressure shaft support as a first swing point and a back alternating pressure swing frame support as a second swing point. The leg alternating pressure test unit is located at the front end of the mobile frame and is hinged to the leg alternating pressure shaft support. The back alternating pressure test unit is located between the leg alternating pressure test unit and the buttocks alternating pressure test unit and is hinged to the back alternating pressure swing frame support.

6. The vehicle seat multi-point alternating pressure durability testing device according to claim 5, characterized in that: The alternating pressure testing mechanism also includes a power unit, which includes a first power source and a cam transmission-connected to the first power source, and the leg alternating pressure testing unit, the buttocks alternating pressure testing unit and the back alternating pressure testing unit are respectively transmission-connected to the edge of the cam.

7. The vehicle seat multi-point alternating pressure durability testing device according to claim 6, characterized in that: The leg alternating pressure testing unit includes a first reset spring and a leg alternating pressure swing frame, one end of the leg alternating pressure swing frame is hinged to the leg alternating pressure shaft support, and the other end serves as a free end and is connected to the edge transmission of the cam, and the two ends of the first reset spring are respectively connected to the movable frame and the free end of the leg alternating pressure swing frame.

8. The vehicle seat multi-point alternating pressure durability testing device according to claim 6, characterized in that: The hip alternating pressure testing unit includes a core shaft and a hip pressure basin. The core shaft can move up and down along the movable frame. The top of the core shaft is transmission-connected to the edge of the cam, and the bottom of the core shaft is connected to the hip pressure basin. The outer sleeve of the core shaft is provided with a second return spring.

9. The vehicle seat multi-point alternating pressure durability testing device according to claim 6, characterized in that: The back alternating pressure testing unit includes a back alternating pressure swing frame and an angle adjustment frame. The back alternating pressure swing frame is linked to the angle adjustment frame, and both are hinged to the back alternating pressure swing frame support. The angle adjustment frame is connected to the edge of the cam by transmission, and a third return spring is arranged between the angle adjustment frame and the movable frame.

10. The vehicle seat multi-point alternating pressure durability testing device according to claim 9, characterized in that: The angle adjustment frame is provided with an adjustment gear which is transmission-connected with the second power source, and the adjustment gear is meshed with the arc-shaped rack on the back alternating pressure swing frame to adjust the pitch angle of the angle adjustment frame.

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