KR100576897B1 - Suspension device vehicle seat - Google Patents

Abstract

The present invention relates to a vibration damping device of a seat, the object of which is to relieve the vibration by the offset of the lifting force of the seat by the coil spring and the lowering force of the seat by the magnet, to support the seat occupant, to feel the ride and feel It is to provide a vibration damping device of the seat that can improve and maintain a balance point (a position that always maintains a constant load in the normal use area and conditions) according to the weight of the seat occupant.

The present invention provides a lower frame installed on the vehicle body, an upper frame installed to move vertically on the lower frame, and an end is rotatably connected to the lower frame, and a link moving guide is slidably installed on the upper frame. A seat vibration damping device comprising: a link unit for imparting a vertical motion to a lower frame, and a buffer unit rotatably connected to one side of the lower frame and connected to the other side of the link unit; An upper magnetic module having an upper permanent magnet installed horizontally by a fixing bracket so that the upper permanent magnet faces downward in the upper frame, and a lower permanent magnet installed in parallel with the upper magnetic module and having a different polarity than the upper permanent magnet are provided on the fixing bracket. A lower magnetic module fixed to the lower frame so as to correspond to the upper permanent magnet, and one side end of the operating spring is connected to the link moving guide of the link unit, and the other end of the operating spring to the spring connecting plate slidably installed on the upper frame. It is connected, and the spring connecting plate is configured to include a load control unit that is horizontally moved by the load adjuster.

Seat, Vibration, Shock Absorber, Magnet, Suspension

Description

Vibration damping device for seat {Suspension device vehicle seat}             

1 is an exemplary view showing a configuration according to the present invention

2 is an exploded view showing the configuration of the present invention

3 is an exemplary view showing a configuration of a load control unit according to the present invention

4 is an exemplary view showing the operating principle of the present invention

5 is an exemplary view showing a static load test result according to the present invention

6 is an exemplary view showing a dynamic load test according to the polarity arrangement and the installation position of the magnetic module

Figure 7 is an illustration showing the relationship between the vibration transfer rate, natural frequency, sheet index of the present invention and the prior art

* Explanation of symbols for main parts of the drawings

110: upper frame 120: lower frame

(130): link unit (131): link movement guide

140: shock absorber 150: rubber stopper

200: upper magnetic module 210: fixed bracket

(220): Upper permanent magnet (300): Lower magnetic module

(310): Fixed bracket (320): Lower permanent magnet

(400): load control unit (410): working spring

420: spring connection 421: slide

(422): Guide Groove (423): Guide Bolt

(424): Spring insertion groove (425): Fixture

(430): load adjuster (431): push rod

(432): Moving Block (433): Adjustment Guide

(434): adjusting screw (435): screw guide

(436): Adjustment handle

The present invention relates to a vibration damping device of the seat, attenuates the vibration from the outside by using the pulling force of the permanent magnet installed to have a different polarity and the repulsive force of the operating spring connected to the link portion to maintain a constant height of the seat at all times It relates to a vibration damping device of the seat.

The improvement of living standards and the effect of five-day work week increase the use of personal leisure time and the convenience of living, and the automobile culture is rapidly formed by these influences. The rapid increase in the number of cars is now used as an indicator of not only the fruits of economic growth that we have achieved, but also the rich quality of life. It is becoming.

As the time spent with the car increases, the physical burden of the passenger who is active in the vehicle increases, and in particular, the vibration transmitted from the road surface is transmitted to the human body through the vehicle body, and is generated when driving in an area with poor road conditions. Vibration may cause damage to the body or nervous system due to vibration exposure of the human body, which may cause symptoms such as fatigue, headache, stiff shoulders, back pain, and poor eyesight.

Seat suspension is used to solve the above problems, that is, to support the occupant while maintaining the maximum comfort of human on the seat, such a seat suspension is a shock generated when driving on uneven roads It aims to improve ride comfort by minimizing, absorbing and suppressing shaking.

However, the seat suspension is conventionally used to cushion the vibration generated by the "Ｘ" -shaped link, the oil damper and a plurality of coil springs between the upper and lower frames, the installed coil spring is the weight of the seated person, As the compression degree of the coil spring is different according to the load applied to the chair, the equilibrium point, that is, the proper elastic force could not be maintained according to the load (seater's weight), and there was a problem that the vibration could not be absorbed and buffered constantly. . In addition, an air spring may be used to dampen the vibration, but the air spring as described above has a very large stroke when an impact (vibration) occurs, thereby lowering the seating feeling of the seated occupant, changing the gaze, shaking of the body, and pedal operation due to this. There was a problem that hinders the safe driving caused by the difficulty.

Currently, vibration models that can dampen / mitigate the vibrations of automobiles in various forms have been studied in consideration of such problems. However, when the damping force is low in the suspension system, the vibration characteristics of the high frequency region are good, but the vibration transfer rate of the resonance point is high. The shock cannot be absorbed. On the contrary, when the damping property is high, the vibration characteristics of the resonance point and the absorption force of the impact force are improved, but the vibration characteristics of the high frequency region are worsened. In addition, when a soft spring is used to move the resonance point toward the low frequency side, the vibration transfer rate increases, and when the damper ratio of the damper is increased to reduce the vibration transfer rate, the shear rate of the high frequency becomes high. The vibration model has a problem such that the performance is limited.

The present invention has been made in consideration of the above problems, and its object is to alleviate the vibration by offsetting the lifting force of the sheet by the coil spring and the lowering force of the sheet by the magnet, supporting the seat seater, riding comfort and feeling of use. It is to provide a vibration damping device of the seat that can maintain the balance point (position to maintain a constant load at all times in normal use area and conditions) according to the weight of the seat occupant by adjusting the spring tension.                         

Another object is to adjust the initial set position of the seat so that when a force is generated within a certain range, it can be absorbed without any change in stroke.

1 is an exemplary view showing a configuration according to the present invention, Figure 2 is an exploded view showing a configuration of the present invention, Figure 3 is an exemplary view showing a configuration of a load control unit according to the present invention, Figure 4 is an operation of the present invention 5 is an exemplary view showing a static load test result according to the present invention, Figure 6 is an exemplary view showing a dynamic load test according to the polarity arrangement and installation position of the magnetic module, Figure 7 is the present invention and conventional Exemplary diagram showing the relationship between the vibration transfer rate, natural frequency, and sheet index of the technology, the present invention is to combine the linear characteristics of the metal spring and the characteristics of the magnetic spring to maintain the linear characteristics in the normal use area By changing the stroke, vibration and shock can be absorbed.

That is, the present invention, the lower frame 120 is installed on the vehicle body, the upper frame 110 is installed so as to move vertically on the lower frame 120, and the end is rotatably connected to the lower frame 120 And a link movement guide 131 is slidably installed on the upper frame 110 to provide vertical movement to the upper / lower frames 110 and 120, and the link unit 130 is rotatable on one side of the lower frame 120. In the seat vibration damping device consisting of a shock absorbing portion 140 is connected to the other side is connected to the link portion 130; The upper magnetic module 200 is horizontally installed in the upper frame 110 to face the lower direction, and has a different polarity than the upper magnetic module 200 and is located below the upper magnetic module 200, the polarity The lower magnetic module 300 is installed horizontally on the lower frame 120 so as to face the upper portion, and the load adjusting unit 400 is connected to the upper frame 110 and the link unit 130, respectively.

The upper magnetic module 200 is composed of a fixing bracket 210 is fixed to the upper frame and the upper permanent magnet 220 is installed horizontally below the fixing bracket (210).

The lower magnetic module 300 is composed of a fixing bracket 310 fixed to the lower frame and a lower permanent magnet 320 installed horizontally below the fixing bracket.

The upper / lower permanent magnets 220 and 320 are horizontally installed on the vehicle body so that different polarities face each other, and the upper / lower permanent magnets 220 are vertical to each other such that the lower permanent magnet 320 is positioned below the upper permanent magnet 220. Are installed on each).

The load control unit 400 is to adjust the tensile strength of the operating spring to provide a lifting force for the lowering force due to the upper and lower magnetic modules and the load according to the load of the seat occupant, as shown in Figure 3, the link A plurality of actuating springs 410, one end of which is connected to the negative link movement guide 131, and the other end of the actuating spring 410 is connected, and both ends are spring-connected to be slidably installed on the upper frame 110. One side end is connected to the plate 420, and the spring connecting plate 420 is fixed to the upper frame 110 is composed of a load adjuster 430 for adjusting the position of the spring connecting plate 420.

The operation spring 410 is installed between the link movement guide 131 and the spring connecting plate 420 of the link portion sliding along the upper frame 110, it is provided a plurality of interference does not occur.

The spring connecting plate 420 is composed of a slide 421 connected to the operating spring 410, and a fixing stand 425 installed perpendicular to the slide 421 and connected to the load control unit 430. The slide 421 has a guide groove 422 formed at both ends, a guide bolt 423 fixed to the upper frame 110 through the guide groove 422, and the two guide grooves 422. It is composed of a plurality of spring insertion grooves 424 formed at equal intervals, and the fixing table 425 is formed at the center of one side of the slide. That is, the slide 421 and the fixing table 425 are formed to be perpendicular to each other.

That is, the spring connecting plate 420 is installed to be positioned on the upper frame, the guide bolt 423 is fixed to be installed through the guide groove 422 formed on both sides, the diameter of the guide bolt 423 It is formed to be smaller than the diameter of the guide groove 422. The spring connecting plate 420 formed as described above may move the guide groove 422 around the guide bolt 423, thereby moving the spring connecting plate 420 back and forth horizontally.

The load adjuster 430 is to adjust the tensile force of the operating spring 410, the rod 431 is connected to one end of the fixing rod 425 of the spring connecting plate, and the other end of the rod 431 is connected And an adjustment guide 433 in which a moving block 432 is installed at one side, an adjusting screw 434 in which the moving block 432 is screwed, and both sides of the adjusting screw 434 are bearing-supported and an upper frame. Screw guide 435 is fixed to the lower surface of the support 120 to control the adjustment screw, the adjustment handle 436 is installed in the adjustment screw 434 protruding outwardly through the screw guide 435 Consists of The load adjuster 430 configured as described above rotates the adjustment screw 434 by the rotation of the adjustment handle 436, the moving block 432 by the rotation of the adjustment screw 434 the adjustment screw 434. Accordingly, the horizontal movement forward and backward, the push rod 431 is horizontally moved by the horizontal movement of the moving block 432 is to move the spring connecting plate 420 connected thereto. At this time, the spring connecting plate 420 is horizontally moved by the guide groove 422 around the guide bolt 423. By the above operation, the tensile force of the operation spring 410, one side of which is connected to the link unit 130, is adjusted.

In addition, when a large shock or more than a certain displacement occurs, the upper frame 110 is further lowered by mounting the rubber stopper 150 on the lower frame to prevent impact damage caused by contact of the upper and lower magnetic modules 200 and 300. It is not supposed to be done.

In the present invention configured as described above, as shown in FIG. 4, when the displacement is input to a sine wave having an arbitrary amplitude from the outside, the pulling force F1 between the magnets acts and the tension spring F2 acts as the operating spring increases. Done. At this time, the force F1 lowers the upper frame, the force raising the upper frame by F2 acts simultaneously, and the upper frame lift force F3 is generated by the difference in the force generated by the F1 and F2.

That is, in the present invention, when the distance between the upper and lower magnetic modules having different polarities approaches, the pulling force between the upper and lower permanent magnets increases, but at the same time, the spring is generated by tensioning the operating spring. The link portion is operated in the direction of raising the upper frame to generate a force to lift the sheet upwards.

As described above, the present invention attenuates the vibration from the outside by a combination of the pulling force generated from the upper / lower magnetic module having different polarities and the repulsive force generated when the operating spring increases, thereby increasing the height of the seat seated by the wearer. It is always kept constant.

Figure 5 shows an exemplary view showing the static load test results according to the present invention, the distance between the upper and lower magnetic modules to 50mm, the test speed to 3mm / sec was subjected to a static load test, such a test By combining the operating spring and the upper and lower magnetic modules, it can be seen that the horizontal section is formed with a gentle slope from about 20 mm between the magnets.

The horizontal section as described above is a section that maintains a horizontal state without a change in load even if the free height is changed, and a section in which vibration is absorbed without transmitting load to the upper frame even when vibration is input from the outside. That is, in the horizontal section, as the load increases, the gap between the upper and lower magnetic modules having different polarities decreases, and thus the pulling force increases, and this pulling force appears to be offset by the action force of the working spring. When adjusting the tension of the working spring, the gap between the upper / lower magnetic and the load so that the initial position of the seat is set in the middle, the final combined spring force will be close to "0" in the horizontal section. When a force is introduced, it can absorb vibrations and shocks with a small stroke.

Figure 6 shows an exemplary view showing a dynamic load test according to the polarity arrangement and the installation position of the magnetic module, will be described in detail based on the embodiment as follows.

Example 1

A lower frame installed on the vehicle body, an upper frame installed to be moved vertically on the lower frame, a link part connected to the upper / lower frame and providing vertical movement to the upper / lower frame, and one side of the lower frame. In the seat vibration damping device consisting of a shock absorbing portion rotatably connected to the other side is connected to the link portion; The upper and lower magnetic modules each having two polarities are connected and installed to connect to the link unit, and the operating springs of the load control unit are limited to four. That is, the upper and lower magnetic modules are inclined, and the magnet polarities of the upper and lower magnetic modules are arranged to correspond to the same polarity.

The static spring constant, the dynamic spring constant, the resonance frequency, the vibration transfer rate, and the sheet index for the sheets thus constructed were measured, and the results are shown in Table 1 below.

Example 2

A lower frame installed on the vehicle body, an upper frame installed to be moved vertically on the lower frame, a link part connected to the upper / lower frame and providing vertical movement to the upper / lower frame, and one side of the lower frame. In the seat vibration damping device consisting of a shock absorbing portion rotatably connected to the other side is connected to the link portion; The upper and lower magnetic modules each having two polarities are connected and installed to connect to the upper and lower frames, and the operating springs of the load control unit are limited to four. That is, the upper and lower magnetic modules are horizontally installed on the upper and lower frames, and the magnet polarities of the upper and lower magnetic modules are arranged to correspond to the same polarity.

The static spring constant, the dynamic spring constant, the resonance frequency, the vibration transfer rate, and the sheet index for the sheets thus constructed were measured, and the results are shown in Table 1 below.

Example 3

A lower frame installed on the vehicle body, an upper frame installed to be moved vertically on the lower frame, a link part connected to the upper / lower frame and providing vertical movement to the upper / lower frame, and one side of the lower frame. In the seat vibration damping device consisting of a shock absorbing portion rotatably connected to the other side is connected to the link portion; The upper and lower magnetic modules each having two polarities are connected and installed to be connected to the upper and lower frames, and the operation springs of the load control unit are limited to four. That is, the upper / lower magnetic module is horizontally installed on the upper / lower frame, and the magnet polarities of the upper / lower magnetic modules are arranged to correspond to opposite polarities.

Static spring constant, dynamic spring constant (index representing the spring constant when dynamic load is applied, the better the constant is), the resonant frequency, the vibration transfer rate (the ratio of output to input) The lower the value, the better the vibration absorption) and the sheet index (the higher the numerical value as the index for evaluating the cushion of the seat, the better the cushion property of the seat), respectively, the results are shown in Table 1.

Example 1 (X1) Example 2 (X2) Example 3 (X3) Static spring constant 3.1 kgf / mm 6.5 kgf / mm 1.5 kgf / mm Dynamic Spring Constant 2.7 kgf / mm 7.7 kgf / mm 1.1 kgf / mm Resonant frequency 2.9 ㎐ 4.4 ㎐ 2.0 ㎐ Vibration Transfer Rate (TR) 2.9 4.9 1.8 Sheet Index (R.N.) 0.4 0.14 0.69

As shown in Table 1, when the magnetic having a different polarity in accordance with the present invention horizontally installed in the upper / lower frame, it can be seen that it has excellent efficacy in all aspects.

Figure 7 shows an exemplary view showing the relationship between the vibration transfer rate, natural frequency, the sheet index of the present invention and the prior art, the Y axis represents the vibration transfer rate, the X axis represents a frequency band. At this time, the vibration transfer rate is a coefficient representing the amount of vibration absorbed by the suspension and transmitted to the other side when an external force is applied to one side, and the vibration transfer rate is preferably low, and the frequency band represents a natural frequency value generated in each sheet.

A: conventional air suspension installation, B: MMC (Mitsubishi Motors), C: suspension installation of the present invention

A B C Vibration Transfer Rate (TR) 2.2 2.4 1.8 Natural frequency 2.5 ㎐ 3.3 ㎐ 2.0 ㎐ Sheet Index (R.N) 0.46 0.32 0.69

As described above, considering the vibration transfer rate, the sheet index of the suspension is installed seat of the present invention is excellent, the natural frequency of the nerve terminal of the human body can be seen that the natural frequency is very low.

The present invention made as described above is calculated by the combination of the load characteristics of the operating spring and the upper / lower magnetic module to calculate the horizontal section close to the spring force "0" between the upper / lower magnetic module to be located in the middle of the horizontal section. Set the initial position of the seat by setting the interval (or initial tension of the operating splice). When the initial position of the seat is set in this way, when a force (vibration and impact) in the horizontal section is generated, it is possible to absorb the load without changing any stroke within a certain range.

In addition, when a change occurs in the initial setting position of the seat due to the load of the seated person, the spring force can be returned to the initial setting value by adjusting the tension force of the operation spring by operating the control handle connected to the upper frame.

In this way, the present invention can absorb the vibration and shock in a small stroke by offsetting the pull force and the force applied from the magnetic module by the tension of the working spring, and is always constant against the displacement (vibration) coming from the outside Maintaining the height to provide a stable ride to the driver, there is an effect that can be directed to safe driving.

In addition, the present invention can adjust the tension of the operating spring according to the weight of the seat occupant, so that the seat can cope with the displacement (vibration) in the optimum state.

In addition, the magnetic module is installed horizontally and with different polarities facing each other, thereby facilitating control of the repulsive force of the magnetic, thereby setting the sheet in an optimal state.

In addition, compared to the conventional suspension consisting of complex components such as actuators, various sensors and pneumatic components, the configuration is simple, miniaturized, easy to maintain and repair, and has an excellent economic effect.

In addition, since the rubber stopper is further installed in the lower frame, it is possible to prevent damage to the magnetic module due to the strong impact.

In addition, there is a lot of effects, such as little noise and friction can give comfort to the driver.

Claims (3)

A lower frame installed in the vehicle body, an upper frame installed to be moved vertically on the lower frame, and an end is rotatably connected to the lower frame, and a link moving guide is slidably installed on the upper frame so that the upper / lower frame is slidably installed. In the seat vibration damping device consisting of a link unit for imparting a vertical movement to the shock absorbing portion rotatably connected to one side of the lower frame and the other side is connected to the link portion; An upper magnetic module having an upper permanent magnet installed horizontally by a fixing bracket so as to face the upper frame in a lower direction; A lower magnetic module installed in parallel with the upper magnetic module and fixed to the lower frame such that the lower permanent magnet having a different polarity than the upper permanent magnet corresponds to the upper permanent magnet by a fixing bracket; A plurality of operation springs, one end of which is connected to one side of the link part, a spring connection plate connected to the other end of the operation spring, and both ends of which are slidably installed on the upper frame, and one end connected to the spring connection plate, A load control unit fixed to the upper frame and configured as a load control unit for adjusting the position of the spring connecting plate; And a rubber stopper mounted on one side of the lower frame. delete delete

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