CN117686207A - Automobile seat backrest durability test equipment - Google Patents
Automobile seat backrest durability test equipment Download PDFInfo
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- CN117686207A CN117686207A CN202410136947.9A CN202410136947A CN117686207A CN 117686207 A CN117686207 A CN 117686207A CN 202410136947 A CN202410136947 A CN 202410136947A CN 117686207 A CN117686207 A CN 117686207A
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- 238000012360 testing method Methods 0.000 title claims abstract description 72
- 230000007246 mechanism Effects 0.000 claims description 15
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- 238000010586 diagram Methods 0.000 description 5
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- 230000005540 biological transmission Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 210000001217 buttock Anatomy 0.000 description 1
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Abstract
The invention discloses a device for testing durability of a backrest of an automobile seat, and relates to the technical field of testing; in order to solve the problem of accuracy; the electric control variable test device comprises a base for fixing a seat to be tested and a support frame fixed at the top of the base through bolts, wherein one side, close to a backrest of the seat to be tested, of the support frame is provided with an electric control variable test head in sliding fit through a guide rod, and the end part of the electric control variable test head is fixed with a profiling backboard. According to the invention, the electromagnet A, the electromagnet B and the spring I are arranged, so that the damage caused by collision of the profiling backboard and the backrest can be prevented by utilizing a flexible supporting relationship, the load applied to the backrest by the profiling backboard can be controlled by the distance and the current of the electromagnet A and the electromagnet B, and the random control of the current of the electromagnet A and the current of the electromagnet B is combined with the random control of the random electric control assembly, so that the load randomness can be controlled, the actual working condition can be more met, and the test precision can be increased.
Description
Technical Field
The invention relates to the technical field of testing, in particular to a device for testing durability of an automobile seat backrest.
Background
The automobile seat is an important component part of an automobile, and consists of a seat cushion at the bottom and a backrest rotationally connected to the seat cushion, wherein the seat cushion and the backrest are respectively used for supporting buttocks and backs of people, and in the actual bearing process, the seat cushion and the backrest are required to provide certain supporting torque, so that the durability test is required to be carried out on the rotational connection part of the seat cushion and the backrest.
Through searching, the patent with the Chinese patent publication number of CN215065267U discloses an automobile seat business turn over durability testing arrangement, which comprises a portal frame, a guide post, a first lead screw driving mechanism, a mounting bracket, a second lead screw driving mechanism, a third lead screw driving mechanism, a first linear guide rail, a first transition frame, a second linear guide rail, a fourth lead screw driving mechanism, a third transition frame, a first telescopic cylinder, a seat cushion pressing testing mechanism, a third linear guide rail, a rack, a fourth transition frame, a first servo motor, a second telescopic cylinder, a gear and a backrest pressing testing mechanism.
The above patent suffers from the following disadvantages: the test force can not be periodically and randomly changed, and the actual driving habits of the drivers are different because of different actual drivers, so that different supporting torques are required to be provided by the backrest, and the test result and the actual working condition have deviation, and the precision is lower.
To this end, the invention proposes a vehicle seat back durability test apparatus.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an automobile seat backrest durability test device.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a durability test device for a backrest of an automobile seat comprises a base for fixing the seat to be tested and a supporting frame fixed on the top of the base through bolts,
one side of the support frame, which is close to the backrest of the seat to be tested, is provided with an electric control variable test head in sliding fit through a guide rod, the end part of the electric control variable test head is fixed with a profiling backboard, and the other side of the support frame is respectively provided with a lifting mechanism for controlling the electric control variable test head in a reciprocating manner and a random electric control assembly for controlling the pressure of the electric control variable test head;
the electric control variable testing head comprises a bearing cylinder body and a T-shaped piston which is connected with the bearing cylinder body in a sliding mode, the profiling back plate is fixed to the end portion of the T-shaped piston through a bolt, a first spring is fastened to the opposite side of the profiling back plate and the bearing cylinder body, a first electromagnet B is fixed to the other end portion of the T-shaped piston, a first electromagnet A is fixed to the inner wall of the bearing cylinder body, located in the opposite direction of the first electromagnet B, and the first electromagnet A and the first electromagnet B are electrically connected to the random electric control assembly.
Preferably: the lifting mechanism comprises a motor fixed on the side wall of the support frame through a bolt and a rotary table connected to an output shaft of the motor through a main shaft, the side wall of the rotary table is movably connected with a hinge shaft through an adjustable connecting piece, the other end of the hinge shaft is rotationally connected with a connecting rod, and the other end of the connecting rod is rotationally connected with the side wall of the bearing cylinder body.
Further: the adjustable connecting piece includes sliding connection in the slider of carousel inner wall and rotates the screw rod of connecting in the carousel inner wall, the screw rod passes through threaded connection in the inner wall of slider, just the outer wall of screw rod has the worm wheel through the key connection, and one side meshing of worm wheel has the worm, and the worm rotates to be connected in carousel one side, and the tip cooperation of worm has and is used for the drive the rotatory automatically controlled drive assembly of worm, the articulated shaft rotates to be connected in the slider.
Based on the scheme: the electric control type driving assembly comprises a hollow cylinder, an electromagnet II A and an electromagnet II B, wherein the hollow cylinder is only connected to one side of the turntable in an axially sliding manner, the hollow cylinder is movably sleeved on the outer wall of the worm, the outer wall of the worm is provided with a spiral groove, and the hollow cylinder is movably and limitedly matched with the spiral groove through a protrusion welded on the inner wall of the hollow cylinder.
Among the foregoing, the preferred one is: the second electromagnet A is fixed at the end part of the hollow cylinder, the second electromagnet B is fixed at one side of the turntable, the inner side of the end part of the hollow cylinder is buckled with the second spring, and the other end of the second spring is buckled at the side wall of the turntable.
As a further scheme of the invention: and the electromagnet II A and the electromagnet II B are electrically connected to the random electric control assembly.
Simultaneously, the random electric control assembly comprises a cam disc II, a primary rotating frame, a cam disc I and a plurality of circular array secondary rotating frames, wherein the cam disc I is fixedly connected with the primary rotating frame through a connecting shaft, the connecting shaft is rotationally connected with a supporting frame, the cam disc II is fixed on the outer wall of a main shaft, and the secondary rotating frames are rotationally connected with the supporting frame.
As a preferred embodiment of the present invention: the side wall of the primary rotating frame is provided with an arc-shaped groove I and a strip-shaped groove I which are arranged at intervals, one end of the cam disc II is provided with an arc-shaped block matched with the arc-shaped groove I, and the other end of the cam disc II is fixed with a driving column I which can be matched with the strip-shaped groove I.
Meanwhile, a second strip-shaped groove and a second arc-shaped groove which are arranged at intervals are respectively formed in the side wall of the second rotary frame, the second arc-shaped groove is adapted to the outer wall of the first cam disc, a driving column II matched with the second strip-shaped groove is fixed on one side of the first cam disc, and an avoidance groove is formed in the side wall of the first cam disc.
As a more preferable scheme of the invention: one side of each group of the two-stage rotating frame is provided with a group of electrode assemblies, each electrode assembly comprises a second electrode fixed on the supporting frame through the supporting plate and a plurality of resistors fixed on the outer wall of the two-stage rotating frame, and a connecting terminal of each resistor is fixed with a first electrode which can be in contact fit with the second electrode, and all resistance values of the resistors are different.
The beneficial effects of the invention are as follows:
1. according to the invention, the electromagnet A, the electromagnet B and the spring I are arranged, so that the damage caused by collision of the profiling backboard and the backrest can be prevented by utilizing a flexible supporting relationship, the load applied to the backrest by the profiling backboard can be controlled by the distance and the current of the electromagnet A and the electromagnet B, and the random control of the current of the electromagnet A and the electromagnet B by combining the random electric control assembly can be realized, so that the load randomness can be controlled, the actual working condition can be more met, and the test precision can be increased.
2. According to the invention, on the basis of comprehensively providing flexible force by arranging the bearing cylinder body, the electromagnet I B and the spring I, the position of the sliding block can be adjusted by arranging the adjustable connecting piece, so that the displacement of the electric control variable testing head is adjusted, and the positions of the electromagnet II A, the electromagnet II B and the spring II pair of sliding blocks are utilized to realize random adjustment, so that the current of the bearing cylinder body, the electromagnet I B and the compression of the spring I are randomly controlled, and thus, the superposition of two random states is realized, the randomness is further increased, and the testing precision is increased.
3. According to the invention, on the basis of changing the currents of the electromagnet A, the electromagnet B A and the electromagnet B, the electromagnet A, the electromagnet B A and the electromagnet B are additionally arranged by utilizing different resistor access circuits, so that the arrangement of multiple resistors can be realized by utilizing the rotation of the secondary rotating frame, the diversity of random data is increased, on the other hand, the power of the main shaft can be used as the power for random switching by utilizing double intermittent transmission, and the periodic random data change can be realized on the basis of guaranteeing the continuity test.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an apparatus for testing the durability of a backrest of a car seat according to the present invention;
FIG. 2 is a schematic cross-sectional view of an electrically controlled variable test head of an apparatus for testing the durability of a backrest of a vehicle seat according to the present invention;
FIG. 3 is a schematic view of a lifting mechanism of an apparatus for testing durability of a backrest of an automobile seat according to the present invention;
FIG. 4 is a schematic view of an adjustable connector for a device for testing durability of a backrest of a vehicle seat according to the present invention;
FIG. 5 is a schematic diagram of an electrically controlled driving assembly of an apparatus for testing durability of a backrest of an automobile seat according to the present invention;
FIG. 6 is a schematic diagram of a random electrical control assembly of an apparatus for testing the durability of a backrest of a vehicle seat according to the present invention;
fig. 7 is a schematic diagram of a matching structure of a primary rotating frame and a cam disc of the automobile seat backrest durability test equipment;
FIG. 8 is a schematic view of the mating structure of the first cam plate and the second turret of the durability test apparatus for an automobile seat back according to the present invention;
fig. 9 is a schematic circuit diagram of an apparatus for testing durability of a backrest of a vehicle seat according to the present invention.
In the figure: 1. a base; 2. a seat to be tested; 3. profiling backboard; 4. an electrically controlled variable test head; 5. a guide rod; 6. a lifting mechanism; 7. a random electric control assembly; 8. a support frame; 9. an electromagnet A; 10. a force bearing cylinder; 11. an electromagnet B; 12. a first spring; 13. a T-shaped piston; 14. a motor; 15. a main shaft; 16. an adjustable connector; 17. a hinge shaft; 18. a support plate; 19. a connecting rod; 20. a turntable; 21. a worm; 22. a worm wheel; 23. a screw; 24. a slide block; 25. an electronically controlled drive assembly; 26. a spiral groove; 27. a protrusion; 28. a hollow cylinder; 29. a second spring; 30. an electromagnet II A; 31. an electromagnet B; 32. an electrode assembly; 33. a secondary rotating frame; 34. a primary rotating frame; 35. a cam disc I; 36. a connecting shaft; 37. a cam disc II; 38. an arc-shaped groove I; 39. a first strip-shaped groove; 40. an arc-shaped block; 41. driving the first column; 42. an avoidance groove; 43. a second driving column; 44. a second strip-shaped groove; 45. an arc-shaped groove II; 46. a resistor; 47. an electrode I; 48. and an electrode II.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the specific embodiments.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
Example 1: the utility model provides a car seat back durability test equipment, as shown in fig. 1-9, is including the base 1 that is used for fixing seat 2 to be tested and the support frame 8 that is fixed in base 1 top through the bolt, one side that support frame 8 is close to seat 2 back to be tested has automatically controlled variable test head 4 through guide bar 5 sliding fit, and the tip of automatically controlled variable test head 4 is fixed with profile modeling backplate 3, just the opposite side of support frame 8 is provided with respectively and is used for the elevating system 6 to automatically controlled variable test head 4 reciprocal control and to automatically controlled variable test head 4 pressure control's random automatically controlled subassembly 7.
The electric control variable testing head 4 comprises a bearing cylinder body 10 and a T-shaped piston 13 which is connected with the bearing cylinder body 10 in a sliding manner, the profiling back plate 3 is fixed at the end part of the T-shaped piston 13 through bolts, a first spring 12 is buckled on one side, opposite to the bearing cylinder body 10, of the profiling back plate 3, an electromagnet A11 is fixed at the other end part of the T-shaped piston 13, an electromagnet A9 is fixed on the inner wall, opposite to the electromagnet B11, of the bearing cylinder body 10, and the electromagnet A9 and the electromagnet B11 are electrically connected with the random electric control assembly 7.
When the device is used, after the seat 2 to be tested is fixed on the base 1, the lifting mechanism 6 drives the electric control variable testing head 4 to reciprocate, so that the profiling backboard 3 contacts with the backrest of the seat 2 to be tested, then the electric control variable testing head 4 continuously moves, on one hand, the profiling backboard 3 is pressurized by the elastic force of the first spring 12, on the other hand, the profiling backboard 3 is pressurized by the first electromagnet A9 and the first electromagnet B11, and the random electric control assembly 7 can randomly change the current magnitude of the first electromagnet A9 and the first electromagnet B11 after each test, so that the random control of the pressure is realized.
According to the device, the electromagnet A9, the electromagnet B11 and the spring A12 are arranged, so that the damage caused by collision between the profiling backboard 3 and a backrest can be prevented by utilizing a flexible supporting relationship, the load applied to the backrest by the profiling backboard 3 can be controlled by the distance and the current of the electromagnet A9 and the electromagnet B11, and the random control of the current of the electromagnet A9 and the electromagnet B11 by combining the random electric control assembly 7 can be realized, so that the load randomness can be controlled, the actual working condition can be met more, and the test precision can be increased.
In order to solve the problem of lifting control; as shown in fig. 3, the lifting mechanism 6 includes a motor 14 fixed on a side wall of the support frame 8 through a bolt, and a turntable 20 connected to an output shaft of the motor 14 through a main shaft 15, wherein a hinge shaft 17 is movably connected to a side wall of the turntable 20 through an adjustable connecting piece 16, a connecting rod 19 is rotatably connected to the other end of the hinge shaft 17, and the other end of the connecting rod 19 is rotatably connected to a side wall of the bearing cylinder 10.
When the motor 14 is started, the motor can drive the turntable 20 to rotate through the main shaft 15, so that the adjustable connecting piece 16 and the hinge shaft 17 drive the hinge shaft 17 to move, and the force-bearing cylinder body 10 is driven to reciprocate.
To further solve the accuracy problem; as shown in fig. 4 and 5, the adjustable connection member 16 includes a slider 24 slidably connected to an inner wall of the turntable 20 and a screw 23 rotatably connected to an inner wall of the turntable 20, the screw 23 is connected to an inner wall of the slider 24 through a thread, an outer wall of the screw 23 is connected with a worm wheel 22 through a key, one side of the worm wheel 22 is meshed with a worm 21, the worm 21 is rotatably connected to one side of the turntable 20, an end portion of the worm 21 is matched with an electrically controlled driving assembly 25 for driving the worm 21 to rotate, and the hinge shaft 17 is rotatably connected to the slider 24.
The electric control driving assembly 25 comprises a hollow cylinder 28, an electromagnet II A30 and an electromagnet II B31, the hollow cylinder 28 is only connected to one side of the turntable 20 in an axially sliding manner, the hollow cylinder 28 is movably sleeved on the outer wall of the worm 21, the outer wall of the worm 21 is provided with a spiral groove 26, and the hollow cylinder 28 is movably and limitedly matched with the spiral groove 26 through a protrusion 27 welded on the inner wall of the hollow cylinder 28.
The second electromagnet A30 is fixed at the end of the hollow cylinder 28, the second electromagnet B31 is fixed at one side of the turntable 20, the inner side of the end of the hollow cylinder 28 is buckled with the second spring 29, and the other end of the second spring 29 is buckled at the side wall of the turntable 20.
And the electromagnet II A30 and the electromagnet II B31 are electrically connected to the random electric control assembly 7.
When the random electric control assembly 7 generates random current, the current is also transmitted to the electromagnet two A30 and the electromagnet two B31, so that the magnetic force randomness of the electromagnet two A30 and the electromagnet two B31 is changed, the hollow cylinder 28 is randomly axially moved by combining the elastic force of the spring two 29, the worm 21 is randomly rotated by the protrusion 27 and the spiral groove 26, the screw 23 is driven to randomly rotate by the worm wheel 22, the position randomness of the sliding block 24 is changed, and the displacement distance randomness of the electric control variable testing head 4 is changed.
According to the device, on the basis of comprehensively providing flexible force by arranging the bearing cylinder body 10, the electromagnet B11 and the spring I12, the position of the sliding block 24 can be adjusted by arranging the adjustable connecting piece 16, so that the displacement of the electric control variable test head 4 is adjusted, the position of the sliding block 24 is randomly adjusted by utilizing the electromagnet B30, the electromagnet B31 and the spring II 29, the current of the bearing cylinder body 10 and the electromagnet B11 and the compression of the spring I12 are randomly controlled, so that duplicate random state superposition is realized, the randomness is further increased, and the test precision is increased.
In this embodiment, when the seat 2 to be tested is fixed on the base 1, the lifting mechanism 6 drives the electrically controlled variable testing head 4 to reciprocate, so that the profiling backboard 3 contacts the backrest of the seat 2 to be tested, then the electrically controlled variable testing head 4 continues to move, on one hand, pressure is applied to the profiling backboard 3 by using the elastic force of the first spring 12, on the other hand, pressure is applied to the profiling backboard 3 by the first electromagnet A9 and the first electromagnet B11, the random electric control assembly 7 can randomly change the current magnitude of the first electromagnet A9 and the first electromagnet B11 after each test, so that random control of the pressure is realized, when the random electric control assembly 7 generates random current, the current is also transmitted to the second electromagnet a30 and the second electromagnet B31, so that the magnetic force of the second electromagnet a30 and the second electromagnet B31 is changed randomly, so that the elastic force of the second spring 29 is combined, so that the hollow cylinder 28 moves randomly in the axial direction, so that the worm 21 is rotated randomly by the protrusion 27 and the spiral groove 26, so that the worm 23 is driven by the worm 22, the position of the slide block 24 is changed randomly, so that the distance of the electrically controlled variable testing head 4 is changed randomly.
Example 2: an automobile seat backrest durability test apparatus, as shown in fig. 1, for solving the problem of current random control; this example is modified on the basis of examples 1, 6-9 as follows: the random electric control assembly 7 comprises a cam disc two 37, a primary rotating frame 34, a cam disc one 35 and a plurality of circular array secondary rotating frames 33, wherein the cam disc one 35 is fixedly connected with the primary rotating frame 34 through a connecting shaft 36, the connecting shaft 36 is rotatably connected with the supporting frame 8, the cam disc two 37 is fixed on the outer wall of the main shaft 15, and the secondary rotating frames 33 are rotatably connected with the supporting frame 8.
The side wall of the primary rotating frame 34 is provided with an arc-shaped groove I38 and a strip-shaped groove I39 which are arranged at intervals, one end of the cam disc II 37 is provided with an arc-shaped block 40 matched with the arc-shaped groove I38, and the other end of the cam disc II 37 is fixedly provided with a driving column I41 matched with the strip-shaped groove I39.
When the cam disc two 37 rotates, the arc-shaped block 40 is matched with the arc-shaped groove one 38 to enable the primary rotating frame 34 to be static, when the arc-shaped block 40 is separated from the arc-shaped groove one 38 in a rotating mode, the driving column one 41 is matched with the strip-shaped groove one 39, and the driving column one 41 is locked to rotate to drive the primary rotating frame 34 to rotate, and therefore intermittent equal-angle rotation of the primary rotating frame 34 under continuous movement of the cam disc two 37 is achieved.
The side wall of the secondary rotating frame 33 is respectively provided with a second strip-shaped groove 44 and a second arc-shaped groove 45 which are arranged at intervals, the second arc-shaped groove 45 is adapted to the outer wall of the first cam disc 35, one side of the first cam disc 35 is fixed with a second driving column 43 matched with the second strip-shaped groove 44, and the side wall of the first cam disc 35 is provided with an avoidance groove 42.
When the first cam disk 35 rotates and the side wall of the first cam disk is matched with the second arc-shaped groove 45, the second rotary frame 33 is static, and when the second arc-shaped groove 45 is separated from the side wall of the first cam disk 35, the second driving column 43 is matched with the second strip-shaped groove 44, so that the second rotary frame 33 is driven to rotate, and the intermittent equal-angle rotation of the second rotary frame 33 is realized under the condition that the first cam disk 35 continuously rotates.
One side of each secondary rotating frame 33 is provided with a group of electrode assemblies 32, the electrode assemblies 32 comprise a second electrode 48 fixed on the supporting frame 8 through the supporting plate 18 and a plurality of resistors 46 fixed on the outer wall of the secondary rotating frame 33, a first electrode 47 which can be in contact fit with the second electrode 48 is fixed on a connecting terminal of each resistor 46, and all the resistors 46 are different in resistance value.
The resistor 46, the first electrode 47 and the second electrode 48 are electrically connected to the first electromagnet A9, the first electromagnet B11, the second electromagnet A30 and the second electromagnet B31.
In this embodiment, when the cam plate two 37 rotates, the arc block 40 is matched with the arc groove one 38, so that the primary rotating frame 34 is static, when the arc block 40 is separated from the arc groove one 38, the driving post one 41 is matched with the bar groove one 39, and the driving post one 41 is locked to rotate so as to drive the primary rotating frame 34 to rotate, thus realizing intermittent equiangular rotation of the primary rotating frame 34 under continuous movement of the cam plate two 37, when the cam plate one 35 rotates, the side wall of the cam plate two 35 is matched with the arc groove two 45, the secondary rotating frame 33 is static, and when the arc groove two 45 is separated from the side wall of the cam plate one 35, the driving post two 43 is matched with the bar groove two 44, so that the secondary rotating frame 33 is driven to rotate, thus realizing intermittent equiangular rotation of the secondary rotating frame 33 under continuous rotation of the cam plate one 35, and then rotating the resistors 46 are rotated, so that different resistors 46 are connected into the electromagnet one 9, the electromagnet one B11, the electromagnet two A30 and the electromagnet two electromagnet B31 through the electrode one 47 and the electromagnet two electromagnet 30 are changed, thus the electromagnet two electromagnet 30 and the electromagnet 30 are changed.
The device is additionally provided with the electromagnet A9, the electromagnet B11, the electromagnet B30 and the electromagnet B31 on the basis of changing the current of the electromagnet A9, the electromagnet B11, the electromagnet B30 and the electromagnet B31 by utilizing different resistors 46 to be connected into a circuit, so that the arrangement of multiple resistors 46 can be realized by utilizing the rotation of the secondary rotating frame 33, the diversity of random data is increased, and on the other hand, the power of the main shaft 15 can be used as the power for random switching by utilizing double intermittent transmission, and the periodic random data change can be realized on the basis of guaranteeing the continuity test.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. An automobile seat backrest durability test device comprises a base (1) for fixing a seat (2) to be tested and a support frame (8) fixed on the top of the base (1) through bolts, and is characterized in that,
one side of the support frame (8) close to the backrest of the seat (2) to be tested is slidably matched with an electric control variable test head (4) through a guide rod (5), the end part of the electric control variable test head (4) is fixedly provided with a profiling backboard (3), and the other side of the support frame (8) is respectively provided with a lifting mechanism (6) for controlling the electric control variable test head (4) in a reciprocating manner and a random electric control component (7) for controlling the pressure of the electric control variable test head (4);
the electric control variable test head (4) comprises a bearing cylinder body (10) and a T-shaped piston (13) which is connected with the bearing cylinder body (10) in a sliding mode, the profiling back plate (3) is fixed at the end portion of the T-shaped piston (13) through bolts, a first spring (12) is buckled on the opposite side of the profiling back plate (3) and the bearing cylinder body (10), an electromagnet A (11) is fixed at the other end portion of the T-shaped piston (13), an electromagnet A (9) is fixed on the inner wall of the bearing cylinder body (10) in the opposite direction of the electromagnet A (11), and the electromagnet A (9) and the electromagnet B (11) are electrically connected with the random electric control assembly (7).
2. The automobile seat backrest durability test equipment according to claim 1, wherein the lifting mechanism (6) comprises a motor (14) fixed on the side wall of the support frame (8) through bolts and a rotary table (20) connected to the output shaft of the motor (14) through a main shaft (15), the side wall of the rotary table (20) is movably connected with a hinge shaft (17) through an adjustable connecting piece (16), the other end of the hinge shaft (17) is rotatably connected with a connecting rod (19), and the other end of the connecting rod (19) is rotatably connected with the side wall of the bearing cylinder body (10).
3. The automobile seat backrest durability test apparatus according to claim 2, wherein the adjustable connector (16) comprises a slider (24) slidably connected to an inner wall of the turntable (20) and a screw (23) rotatably connected to the inner wall of the turntable (20), the screw (23) is screwed to the inner wall of the slider (24), and an outer wall of the screw (23) is connected with a worm wheel (22) through a key, one side of the worm wheel (22) is engaged with a worm (21), the worm (21) is rotatably connected to one side of the turntable (20), and an end portion of the worm (21) is fitted with an electrically controlled driving assembly (25) for driving the worm (21) to rotate, and the hinge shaft (17) is rotatably connected to the slider (24).
4. A car seat backrest durability test apparatus according to claim 3, characterized in that the electrically controlled driving assembly (25) comprises a hollow cylinder (28), an electromagnet two a (30) and an electromagnet two B (31), the hollow cylinder (28) is only connected to one side of the turntable (20) in an axially sliding manner, the hollow cylinder (28) is movably sleeved on the outer wall of the worm (21), the outer wall of the worm (21) is provided with a spiral groove (26), and the hollow cylinder (28) is movably and limitedly matched with the spiral groove (26) through a protrusion (27) welded on the inner wall of the hollow cylinder.
5. The device for testing the durability of the backrest of the automobile seat according to claim 4, wherein the electromagnet II A (30) is fixed at the end part of the hollow cylinder (28), the electromagnet II B (31) is fixed at one side of the turntable (20), the spring II (29) is fastened at the inner side of the end part of the hollow cylinder (28), and the other end of the spring II (29) is fastened at the side wall of the turntable (20).
6. The apparatus according to claim 5, wherein the electromagnet two a (30) and the electromagnet two B (31) are electrically connected to the random electric control unit (7).
7. The device for testing the durability of the backrest of the automobile seat according to claim 1, wherein the random electric control assembly (7) comprises a cam disc two (37), a primary rotating frame (34), a cam disc one (35) and a plurality of circular array secondary rotating frames (33), the cam disc one (35) and the primary rotating frame (34) are fixedly connected through a connecting shaft (36), the connecting shaft (36) is rotatably connected to the supporting frame (8), the cam disc two (37) is fixed on the outer wall of the main shaft (15), and the secondary rotating frames (33) are rotatably connected to the supporting frame (8).
8. The automobile seat backrest durability test apparatus according to claim 7, wherein the side wall of the primary rotating frame (34) is provided with an arc-shaped groove one (38) and a strip-shaped groove one (39) which are arranged at intervals, one end of the cam disc two (37) is provided with an arc-shaped block (40) matched with the arc-shaped groove one (38), and the other end of the cam disc two (37) is fixedly provided with a driving column one (41) matched with the strip-shaped groove one (39).
9. The automobile seat backrest durability test equipment according to claim 8, wherein a second strip-shaped groove (44) and a second arc-shaped groove (45) which are arranged at intervals are respectively formed in the side wall of the second rotary frame (33), the second arc-shaped groove (45) is adapted to the outer wall of the first cam disc (35), a second driving column (43) matched with the second strip-shaped groove (44) is fixed on one side of the first cam disc (35), and an avoidance groove (42) is formed in the side wall of the first cam disc (35).
10. The device for testing the durability of the backrest of the automobile seat according to claim 9, wherein one side of each group of the secondary rotating frames (33) is provided with a group of electrode assemblies (32), each electrode assembly (32) comprises a second electrode (48) fixed on the supporting frame (8) through the supporting plate (18) and a plurality of resistors (46) fixed on the outer wall of the secondary rotating frames (33), the connecting terminals of the resistors (46) are fixed with a first electrode (47) which can be in contact fit with the second electrode (48), and all the resistors (46) are different in resistance value.
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