Parameter Analysis of Car Seat Comprehensive Fatigue Vibration Test Bench

Parameter Analysis of Car Seat Omnidirectional Fatigue and Vibration Test Bench

Car seat testing is an important part of automobile parts testing. Seat loading and vibration testing is a process of simulating the real environment for testing, providing a true test for theoretical data in automobile manufacturing. Vibration is an important factor affecting the life of the car seat. During car operation, the car will mainly produce vertical and horizontal vibration relative to the ground due to road reasons and working conditions such as starting and braking; the car seat will produce the same vibration. At the same time, the driver and occupant sitting on the seat will also generate a compound external force on the seat due to vibration inertia.

In the prior art, there is a test benchmeeting the requirements of the car seat vibration test simulating the composite external force. This test bench has relatively complete functions and can meet testing health needs; The chair test bench has many accessories, complex structure, high cost, low precision, and is difficult to maintain; and because of the cost problem, it is difficult to popularize and apply it in small and medium enterprises. However, the test bench with simple structure and low cost can only realize vibration in one direction, and cannot realize compound vibration at the same time, and cannot realize the force vibration experiment external compound simulated required by the car seat.

Therefore, there is a need for a vehicle seat vibration fatigue detecting device, which can realize seat vibration in a single direction.on as required, and also can perform composite external force vibration, with simple structure. , convenient operation and low production cost .

Summary of the Invention

In view of this, the object of the present invention is to provide a complete vibration and fatigue test bench for seats of \'automotive, which can realize a single direction of the seat as required. Vibration can also be used for compound external force vibration, the structure is simple, the operation is convenient, and the production cost is low.

The complete fatigue vibration test bench for car seat of the present invention comprises a base, a seat installation platform, a horizontal vibration device, a vertical vibration and a hip simulation device;

The horizontal vibration device comprises a horizontal carriage disposed on the base by the intermediarydiary of a linear guide rail and a horizontal vibration motor for driving the horizontal carriage to reciprocate along the linear guide rail;

The vertical vibration device includes vertical vibration. The motor and the vertical guide rod, the vertical vibration motor housing is fixed on the horizontal carriage, and the rotor shaft drives the seat installation platform for reciprocating up and down;

The buttocks simulation device includes a support, the rocker arm, the fake hip rotation motor and the fake hip, the support is fixed on the base, the rocker arm is hinged on the support with a single degree of freedom so that it can swing in the vertical plane, and the false hip rotation motor housing is attached to the free end of the rocker arm, the rotor shaft is extended downward for transmission and is connected to the fake butte, and the false buttock faces the car seat to be tested on the seat installation platform.

In addition, the horizontal vibration motor drives the horizontal carriage to reciprocate along the linear guide rail through the horizontal screw pair. Movement, the screw of the horizontal screw pair is driven by the rotor shaft of the horizontal vibration motor, and the nut of the horizontal screw pair is fixed on the horizontal carriage; the vertical vibration motor drives the seat installation platform to reciprocate up and down through the pair of vertical screws, the screw chuck of the vertical pair of chucks screw is suitable for transmitting the rotor shaft of the vertical vibration motor, and the nut of the pair of vertical screw chucks is fixedly connected to the seat installation platform; [0011] In addition, the guide rods are at leastns with three polygonal distributions, the lower end is fixed on the horizontal carriage, and the upper end passes through the seat installation platform in a back-and-forth sliding manner; the outer circle of the guide rod is covered with a compression spring, the lower end of the compression spring resists the upper surface of the horizontal carriage, and the upper end pushes against the upper surface of the horizontal carriage. The lower surface of the seat installation platform;

In addition, on the horizontal plane, three rocker arms are arranged side by side in the direction perpendicular to the rocker arms, and the end of each rocker arm is respectively equipped with a false hip to turn the engine and false buttocks; the rocker arms located on either side are respectively articulated to the support via the corresponding rocker arm seats, and the two rocker arm seats arefixed on the support so as to be able to slide on the horizontal plane in a direction perpendicular to the rocker arm;

In addition, the two rocker arm seats are driven by a screw mechanism to perform a moving movement back and forth along the bracket, and the screw rods of the screw mechanisms of the two rocker arm seats are fixed in the circumferential direction. and the direction of rotation of the thread is opposite, the holder is provided with a handle which is fixedly adapted to the screw shank of any screw mechanism in the circumferential direction;

In addition, the rocker arm uses the hinge point as the fulcrum to form a lever structure, the gravitational moment of the moment arm at one end of the rocker arm installed with the false hip is greater than the gravitational moment of the moment arm at the other end;

In addition, the rocker arm is articulated at the articulation point by means of a tsupport rod attached downward;
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In addition, the driving circuits of the horizontal vibration motor, the vertical vibration motor and the false hip rotation motor are all electrically connected to the control box, and the control box is disposed in the cavity at the bottom of the bracket.

The beneficial effects of the present invention are as follows: The comprehensive fatigue vibration test bench of the car seat of the present invention adopts a horizontal and vertical composite vibration structure, and is combined with a device to simulate the driver\'s and passenger\'s prosthetic buttocks, and each has an independent drive mechanism, which can vibrate the seat in a single direction as needed to achieve a single seat fatigue parameter; it can also drive composite external force vibrations at the same time to carry out wave vibration teste sinusoidal in order to obtain the full resistance of the seat. Fatigue parameters under azimuthal vibration; Since the present invention has only a few parts, it has a simple structure, is easy to disassemble and assemble, is convenient to use, and can reduce production and use costs.

Detailed embodiments

Figure 1 is a schematic structural diagram of the present invention, and Figure 2 is a schematic diagram in direction A of Figure 1. As shown in the figure: the car seat of this embodiment Complete fatigue vibration test bench, including base 7, seat installation platform 2, horizontal vibration device, device vertical vibration device and the hip simulation device;

The horizontal vibration device comprises a linear guide rail Ila placed on the horizontal carriage 11 on the base 7 and used to drive thehorizontal carriage 11, a horizontal vibrating motor 8 which reciprocates along a linear guide rail;

The vertical vibrating device comprises a vertical vibrating motor 5 and a guide rod 13 arranged vertically, and the housing of the vertical vibrating motor 5 is fixed and arranged on a horizontal surface.the carriage 11, as shown In the figure, the housing of the vertical vibration motor 5 is fixed on the lower part of the horizontal carriage 11, and the rotor of the vertical vibration motor 5 rotates axially to insert through the horizontal carriage 11 and drives the platform installation of the seat 2 up and down Reciprocating movement;

The hip simulation device includes a support 14, a rocker arm 19, a false hip rotation motor 21 and a false hip 20, the support 14 is fixed on the base 7; the rocker arm 19 is articulated on the support 14 with a single degree of freedom so as toto be able to oscillate in a vertical plane. As shown in the figure, the rocker arm 19 is hinged at the hinge point through the hinge shaft 18, and the false hip rotation motor shell 21 is fixedly disposed on the free end of the rocker arm 19 ., the rotor shaft of the fake buttock rotation motor 21 extends downward and drives to connect with the fake buttock 20, as shown in the figure, the fake buttock 20 is connected to the rotor shaft of the false buttock rotation motor 21 through the false buttock connecting rod 22; the false buttock 20 faces the installation platform of the seat 2 on the car seat 1 to be detected.

In this embodiment, the horizontal vibration motor 8 drives the horizontal carriage 11 to reciprocate along the linear guide rail 11a through the pair of horizontal screws, and screw 9 of the pair of horizontal screws and the motor ofhorizontal vibration. 8 The rotor shaft is driven and matched, as shown in the figure, the screw chuck 9 is adjusted horizontally; the nut 10 of the pair of horizontal screw chucks is fixedly arranged on the horizontal carriage 11; the vertical vibration motor 5 drives the seat installation platform 2 up and down through the pair of vertical screw chucks. Reciprocating movement, the screw chuck 4 of the vertical screw chuck pair cooperates with the transmission of the rotor shaft of the vertical vibration motor 5, the nut 3 of the vertical screw chuck pair is fixedly connected to the seat installation platform 2, as shown in the figure, the screw chuck 4 is an upward extension, the nut 3 is fixedly arranged at the lower end of the hollow bracket which is connected by fixed manner to the seat installation platform 2 and extends downward; the structure of the horizontal pair of screws and the pairThe vertical screw is adopted, the structure is simple and compact, and it can be precisely driven to meet different amplitude requirements. Accurate vibration testing under high conditions and facilitate vibration data collection.

There are at least three guide rods 13 distributed in a polygonal shape, the lower end of which is fixed on the horizontal carriage 11, and the upper end passes through the seat installation platform 2 sliding back and forth upwards. . Adopt guide rod 13 to be four and rectangularly distributed; The outer circles of the guide rod 13 are provided with the plate clip 12, the lower end of the plate clip 12 of which resists the upper surface of the horizontal carriage 11, the upper end of which supports the lower surface of the seat 2 installation platform; When the vibrating table moves, the springe compression is installed to ensure smooth movement and reduce the impact and noise of movement.

Three rocker arms (rocker arm 19, rocker arm 191 and rocker arm 192 in the figure) are arranged side by side on the horizontal plane in the direction perpendicular to the rocker arm 19 on the support 14, each end of the rocker arm is respectively provided with a false buttock rotation motor 21 and a false buttock 20; rocker arm bracket 17 and rocker arm seat 17a) are hinged to bracket 14. As shown in the figure, rocker arm 19 is hinged to rocker arm seat 17, and rocker arm 192 is hinged to rocker arm seat. rocker arm 17a; The rocker arm seat 17 and the rocker arm seat 17a can be The horizontal plane is arranged on the support 14 so as to slide in the direction perpendicular to the rocker arm. As shown in the figure, the support 14 is provided with a chute in the transverse direction of the tumbleur. The upper ends of the rocker base 17 and the rocker base 17a are placed in a horizontal direction. The boss, rocker arm base 17 and rocker arm base 17a are inserted down into the chute in a reciprocating sliding manner. The bosses of the rocker arm base 17 and the rocker arm base 17a are supported on the support by the triangular slider 16 and the triangular slider 16a. 14; The arrangement of three rockers can be applied to conventional three-seater seats, making the invention very versatile; Since the rocker arms on both sides can slide back and forth relative to the bracket, it can simulate the influence of left and right movement on the driver and passenger seat; at the same time, through the adjustment, it can be applied to seats of different widths, and the precise positioning increases the versatility of the present invention.

The two roles headquarterss rocker arm (rocker seat 17 and rocker seat 17a) are respectively driven in reciprocating movement along the support 14 by a screw mechanism. The screw mechanisms of the two rocker arm seats. The screw shanks are perfectly matched in the circumferential direction and the direction of rotation of the thread is opposite. As shown in the figure, the screw rod 15 and the screw rod 15a are fixedly fitted in the circumferential direction through the flange 25. The nut 23 is fixedly provided on the rocker arm seat 17. The rod 15 and nut 23 cooperate to form a screw mechanism. Nut 23a is fixedly mounted on rocker arm seat 17a. The screw 15a and the nut 23a cooperate to form another screw mechanism, in which the directions of rotation of the threads of the screw 15 and the screw 15a are opposite; The holder 14 is provided with a handle 24 which is fixedly adapted to the screw shank of any screw mechanism in the circumferential directione. As shown in the figure, the handle 24 is fixedly fitted to the new rod 15 in the circumferential direction; the relative position of the false hips on both sides can be adjusted more precisely. Distance, to realize the detection of three seats with different spacing.

In this embodiment, the rocker arms (rocker arm 19, rocker arm 191 and rocker arm 192) form a lever structure with the hinge point as the fulcrum, and the rocker arm is installed with the moment of gravity. from the second arm to one end of the false hip. It is larger than the moment of gravity of the moment arm at the other end; a certain counterweight is formed through the lever structure, so that the fake buttocks act on the seat to better simulate the effect of a real person.

In this embodiment, the rocker arms (rocker arm 19, rocker arm 191 and rocker arm 192) are fixed downwards through the intermediateire of support rods (support rods 19a and 191a respectively in the figure). and spacer 192a) are hinged at the hinge point; it is advantageous to increase the degree of freedom of oscillation of the rocker arm and avoid motion interference during experiments.

In this embodiment, the driving circuits of the horizontal vibration motor 8, the vertical vibration motor 5 and the false hip rotation motor 21 are all electrically connected to the control box 6, which is arranged at the bottom. part of the support. inside the cavity.

When the present invention is used, the horizontal vibration motor drives the horizontal support plate, drives the vertical vibration device, and drives the seat installation platform to vibrate horizontally and at the same time vertically. The upright vibration motor drives the seat installation platform to vibrate vertichocking on the basis of horizontal vibration. At the same time, when the seat vibrates vertically, the false hip swings up and down with the pivot point as the center of the circle, simulating the vibration of the driver and seat occupant. The impact force caused by the seat, at the same time, the false hip rotation motor drives the false hip to rotate around the vertical axis, causing vibration and friction of the seat to rotate and swing from back and forth; thereby simulating the vibration caused by the composite force during actual use.

Finally, the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified ou equivalently substituted without departing from the purpose and scope of the technical specifications. solution of the present invention, and they will be covered by the scope of the claims of the present invention.

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