DE2028612A1 - Suspension for a vehicle seat - Google Patents

Description

Paul C. labor c / o Mercury Metal craft Co., 29440 Calahan Boseville, Michigan / USA

Suspension for a SahrzeugBitz

The invention relates to and relates to vehicle seats in particular a suspension system for vehicle seats, for example for the! driver's seat of a truck, bus or other motor vehicle.

According to a preferred embodiment of the invention a seat structure has a lower one, which is provided as a stand Frame as well as an upper order that serves as a carrier for the Seat is provided. To connect the upper frame with the lower one is a linkage and a spring structure with connecting arms provided, which are arranged in parallel. On one

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A compression spring is articulated to the lower pair of connection bars and carries the upper frame to which it is adjustably attached. The underside of the compression spring can be shifted along the lower pair of the connecting lines _{or the like}

The seat is attached to the upper frame. The lower frame can be moved to adjust the eye level up or down by the variable attachment point of the pressure spring "is shifted between the uppermost and lowermost position by sur Inderraag the seat height changing the ψ bias of the compression spring, without the height of the unloaded seat is influenced, ö, .h, the seat height _f when the driver of the vehicle is not taken Darap ^ f plats Ixat "

The spring hardness baw. Dur © kf © dermig the Sitse® becomes dadiarch set that the lower end of the compression spring IMngs the Connection is shifted, JDadra? © & becomes the angle Aer

. The spring axis has been changed compared to the higher shaft component. In this way, the sit-on shoes and the hardness of the leather are set separately from one another, whereby these devices for the driver on the sit-end are located in the reef area. It 1st Botweadigs not change the seat height & u ¥ he ~ ^ when the spring rate is modified ₉ unless much. large changes in the suspension travel are made.

Exemplary embodiments according to the invention are shown in the following explained in more detail with reference to the drawings, in which

Figure 1 in a side view one with the e.rfindungsgeraäes & B Suspension provided vehicle seat represents.

FIG. 2 shows the structure of the suspension according to FIG. 1 in an exploded view.

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ilgur 3 is a top view of the suspension according to FIG. 1 with the seat removed,.

FIG. 4 shows a side view of a further embodiment of the structure of the seat suspension.

FIG. 5 shows a plan view of the suspension according to FIG.

Figure 6 is a sectional view taken along line 6-6 in Figure 1; FIG. 7 is a sectional view taken along line 7-7 in FIG. 1.

FIG. 8 shows a sectional view along the line 8-8 in FIG 6 "'

In the figures, corresponding components are with the same Provided with reference numerals. Hit 10 is the general structure of the Seat suspension referred to. This structure 10 consists of one Sits 11, a support 12 for the seat, an adjustment device 13 for the linkage and the spring stiffness and from a stand 14,

The stand 14 has a base plate 16 * which is used for fastening to the floor of the vehicle * and it is equipped with a device provided »which carries the whole suspension system« Im a lower frame 17 is provided, which consists of a first side wall 18, a second side wall 19 and a The rear wall 21 consists of the rager 12 in the same way of the seat constructed from an upper frame 22, which has a front wall 23 *, a first side wall 24 and a second side

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ten wall 26 has «,

For attachment of the seat 11 on the upper frame 22 there is provided means _s the horizontally disposed side plates 27 and 28 is "permanently at the top of .the overall _r are fixed vice 22 (Figure 2). These side plates are provided with bores, for example for receiving screw bolts, which can be fastened to a frame 29 of the seat 11. A horizontally arranged plate 30 can also be provided which connects the upper sides of the side walls 24, 26 at their rear ends. FIG. 1 also shows a section of the backrest 31 of the seat Frame 29 and the side panels.

The upper frame 22 of the carrier 12 is connected to the St & aö @ r 14 by an adjusting device 13 for the linkage and the Spring stiffness connected. This adjustment device 13 has two upper in the same plane and spaced ¥ he " connecting arms 34, 36 and a corresponding lower pair of connecting arms 37 arranged in the same manner ^ and 38 on. These two pairs of connecting arms form in Connection with the upper and lower frame the frame of a parallelepiped,

To dampen the vibrations generated by the vehicle, there is a resilient device in the structure of the suspension provided, through which the seat is more comfortable. Due to the resilience of this device, one on the Seat acting force a corresponding displacement of the seat. The ratio of this force to the spring travel is as Characteristic curve or spring stiffness known.

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FIG. 1 is a compression spring 39 as a resilient device shown, the lower end in a Federal support 41 is attached. The upper end of the compression spring 39 is on one Spring plate 42 attached, which in turn is permanently attached to a setting ellwe He 43 is attached to adjust the eye level. the Spring support 41 is on a U-shaped »on guide rails hinged along sliding support or bracket 44, the one Forms means with which the end of the spring 39 along the lower parallel connecting arms 37 and 38 for change the spring stiffness of the suspension system can be moved. The connecting arms thus form the guide rails for this Misshapen temple 44,

To move the U-shaped bracket 44 into the through the parallel connecting arms 37 and 38 formed guide rails, a threaded spindle 46 is provided which with a Button 47 is provided. As can be seen from FIGS. 2, 6 and 8, this spindle 46 extends through an opening in the front wall of the upper frame 22 and it is screwed into a mat 49, which is between a U ~ shaped Pen holder 51 and the front wall 23 is held. The spindle extends through openings 51a, 51b in this pen holder 51, over the upper part of the pivot pin by a device, for example a washer 53, in a hole 44a in the bracket 44 and sliding on guide rails by a washer 54 »The one extending through the bracket 44 Portion of spindle 46 need not be threaded. Through a hole at the end of the spindle 46, for example, a split pin 56 is used, which the Holds the spindle in the bracket 44. The nut 49 is held between the holder 51 and the wall 23. When the knob 47 is twisted ■ wtnäj, - the spindle 46 is screwed through the nut 49, w

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It pushes through the holes in the bracket 44. Since the matter 49 between the front wall 23 of the upper part and the pen holder 51 is held and the bracket 44 between the washers 53 and 54 are fixed to the spindle 46, By turning the knob 47, the bracket 44 becomes in the guideways of the connecting arms 37 »33 and thus also the end the spring 39 shifted. The end of the spring is in place hinged, on which the FederabstützuBg 41 and the bracket 44 are connected to one another. Other facilities can also be used be provided to move this bracket 44 in the guideways.

As the figures 2, 6 and 8 show, there is a Federabstüt & iang 41 of a nut 57, a washer 58 ₉ a retaining plate 59 and a screw 61 _s The Halteplattö 59 is fit to the end of the spring 39 and fixed to it that this hold onto a spring carrier 62. This spring carrier is in turn hinged to the bracket 44 by means of pins 63, which are held in a known manner. In this way, the lower end of the spring 39 can move freely along the guide tracks formed by the lower connecting arms 37, 38 So that the height of the spring 39 resulting from the inclination is changed, since the spring support is articulated in the bracket 44 and this moves in the guide area via lower connecting arms 37 and 38. A laderung the height of the spring 39 results in a change of Federhä ^ te BSSW "the deflection _$ because the force acting on the spring force component äMert * In the be © Weiss canoe spring rate koati-MUierlioh within by the length of the threaded spindle 46 limits adjusted .

ob..v £ 9 shuttlecock 12 ir / eist sinaa upper i'aderträger 64, etar to d & g fötter by means of an upper disc 65 gelial

BATH ORIGINAL

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^ 028612

th, which is attached to the spring by means of a screw 66 which is screwed into a nut 67. A washer 68 is located between the spring carrier 64 and the mat 67 arranged.

The adjustment device 13 for the linkage and the suspension is articulated to the upper and lower frame by means of four joints 52, one of which is shown in FIG. which extends through the walls of the frame ₀ A bearing bush 71 is provided between the outer shaft 69 and the eagle bolt 70. For example, a snap ring 72 or the like can be used to hold the bolt.

To adjust the height of the seat above the ground is a Facility provided that has a convenient and safe prospect of the Fahrseugfahrers made possible. As shown in figure 2 is apparent, is an adjustment device 73 for the Augenbzw. Seat height provided, consisting of two spaced apart, with recesses or holders 74 provided with notches 76. The corresponding adjustment shaft 43 is between the spaced and notched holders 74 at the rear ends thereof hinged. This shaft 43 is attached to the upper spring plate or holder 64. A link rod is also attached to the holders 74 77 attached, which extends through this and is mounted in the side walls 24, 26 of the frame 22, so that the structure 73 can be pivoted about this. A handle bar 78 is located at the front ends of the two holders 74 attached. The hinge rod 77 is close to the tops the holder 74 attached. The rod 78, however, is close to the lower cable of the holder 74 and the shaft 43 between them

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Rods 77 and 78 attached.

A holder 79 for a pin is hinged to the side plate 24 of the upper frame 22 and is attached in such a way that it can be pivoted in an articulated manner 79 ctaela. dieee wall 24 are guided, bo that it can be selectively with the notches 76 in the holder 74 in engagement, whereby the Einstellvorrich- w tung 73 in a given position is set.

So that the holder 79 is held in a normal pitch a device with a spring 84 is provided, which extends from its attachment point on the front wall 23 to au one Hook 86 on this holder 79 extends. This hook 86 engages through an arcuate opening 87 in the wall 24. The leather 84 thus holds the holder 79 in the raised Uorraalstellung, so that the pin 83 is engaged with one of the notches 76.

To operate the holder against the force of the spring 84, a handle 88 is provided ₉ with which the setting device 73 is released and the pin is released from the position of engagement with the notches 76. This handle 88 is thus actuated to ibdern the seat height.

. . So that the spring 39 are pretensioned karaj, even if the seat support 12 in a non-loaded site in a raised Position is, a corresponding device is provided. As can be seen from Figure 2, tension springs 89, the holder structure 73 in © iss ©! © »as a division aa" Ia ties he raised Normally the bar 43 presses the spring 39

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-9 downwards so that it is pretensioned

The leather 59 is normally longer than the distance between its lower end connected to the connecting arms 57 »58 and its upper end connected to the rod 45 when this rod 45 is in a position which is below its highest position · The spring 59 is thus normally preloaded. To limit the upward movement of the seat support 12, an anchoring device 92 is provided which is arranged between the sod plate 16 and the connecting arms 54, 56 so that these arms cannot move upwards beyond a predetermined limit. The pretensioned spring 59 thus pushes the frame 22 upwards by exerting a vertical lifting force through the ends of the connecting arms attached to the frame 22. The connecting arms can be pivoted about the articulated arch by which they are attached to the frame 17. The upward movement of the locking arms is limited by this anchoring device 92. The seat is thus held in a certain raised position in the unloaded state. When the door tension of the spring 59 is changed, the seat height is changed. When the pin is in the lowermost notch of the adjuster 75, the spring is most preloaded. In this position, the compression of the spring by the weight of the driver is minimal, while the seat height is maximal. If the pin is in the top notch of the adjustment device 75, the preload and the seat height are minimal

FIG. 5 is a further embodiment of a device shown, with which one obtains a maximum bias of the spring 59 and a corresponding seat height. It is a motor or · torsion spring 9t is shown, which the

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Holding device 73 hat in the desired position. Dias® Spring 91 acts in a known manner and holds the structure 73 in a normal position.

As can be seen from FIGS. 1 and 2, the holder plate is 74 four Kerbea 76 formed »so toss aa der Adjusting device 73 five different Eiagtellisugea can be (© in a position at "ates am! age 74 the cone). When the handle 88 is depressed,

P pin 83 pulled out of the Kertea 76 rad <äas wqtubsq der Eiastell «» bsw ₀ HalterFörseiclitimg 73 moves according to the S & aft exerted by di® Jfeterss 89 „90, .When the handle loagela @ sea _@ if sioh ä @ 3 ? felter 79 is in position on? at the bottom notch 76a engages, so the Sitähuhe dos Sitees 11 aagehßfeeae To lower the seat bssmsM of the "l'ateeg" only the handle 88 to the bottom © a s & drlfcteHg uetel © s " on the seat © toe exerts downward force, the handle ure ia seiae Hormalsteilung engage Sau laee®n ₈ wherein ä @ v fepfea 83 Ib @ @ 1β exerts lerbea of the notch 76a engages "In this case, di © © Steag 43 less force n ® k down on di® BsacK © the 39 fifees

t the upper spring plate 4 ^ off so that dia Jfedaa? 39 aidit s ©

. .strongly biased is · ¥ ater dam Gewioht d © e Pateare is thus of the seats further down., s © that the is reduced.

For damping vibrations ö @ s

Facility provided »the aa &« ¥ © reatei? Img 92 is. This anchoring kaaa a Stoasä & ipf © ^ _g "belepi @ li a well-known hydraulic shock absorber

as is well known via angeleiikt iet «im

1/

this shock absorber 92 is articulated via a fastening part 94 which is fastened to the joint structure 52a by a holding part 96 "which is supported by the holder and a bracket 97 arranged at the upper end of the shock absorber 92, _{or the like}

To limit the lowest position of the rod 43 is a Pin 98 inserted through the side wall 24 of the upper frame 22 and arranged so that the lower part of the with Notched holder 73 in the lowermost one part division the rod 43 strikes this pin, which means that it cannot be lowered any further.

They Figures 4 and 5 show a further embodiment of the invention, wherein an air spring 101 is provided in place of the compression spring 39, by an appropriate resilience is provided and also a height adjustment of the suspension is the vehicle seat provided _o In Figure 4, the! Air Suspension shown at X in the extended position and at Y in the compressed state. The adjusting device for the spring stiffness can also be used in this embodiment, even if it is not shown in FIGS.

Between the side walls 24 and 26 of the upper frame is a holder 102 is rigidly attached to which the upper end of the Iaift bellows is held by means of a screw 103. The lower The end of the luff bellows 101 is on the lower connecting arms 37 and 38 articulated via a corresponding holder 104.

The driver only needs to raise or lower the seat to operate a control, not shown, whereby compressed air flows into the I / oftbalg via a hose 106 or is deducted from it. When Irtift flows in, it becomes

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the length of the! Diiftbalges vergrassert "is correspondingly reduced by venting Iiuft ₀ The air hose 106 is connected to the compressed air system of the vehicle via flexible and © in Ansehlussventil at 107th This hose 105 is connected to the air bellows 101 via a connecting piece 108 »

The air suspension is ideally suited for 4i @ e @ devices »because its peder hardness is BiQh. with nasty? £ §Bg @ ä3 change, ie ,. & © r change to the Xufffaalg contained © Ben Lnft amount, does not change. If, accordingly, this suspension is applied to the appropriate spring deflection of the suspension when adjusting the height, "it retains this for all other height adjustments",

“The structure according to the figures 4 and 5 also has a pb © ~ -. Res frame 22, since it is connected to the raatareB order 17 via parallel connection ar-ae 37» 38 iaad 34 »36 iat. The connecting arms are aa §®leatea eng © selbil @ s © eii _g in the ... same way as the ßelealse ^ 2 d © ^ previously shown in the figure "..described AueftÖ3Wiagsf © rm a" ag © "forms sinä ₀ 2ar DSnpCung ... yon .. vibrations is a shock absorber 92 vorgosehea.j, ■ d © rb © i, .93 with its \ mt © ren bath © aa <ä © s? Bsäeaplatt © 16 is deflected-1st ^, .and also with the upper connecting arms 34 .uad 3β is articulated via a holder 94, &<b% on the © © leateafbaia 52 .. is aogetoraoht in the same way as © saliaad the l'igur. and the assigned Figusea beselari @ "b © 3Q wiri.it ,, Bi® plates. S5UT .Fastening de® Sitsee. Ia the igwx f © a wad 4 5 not shown _t jedooh they könaea ia ä®s gl®iÄ®a aragebil- manner. det and attached @ ®ia ₈ like

.Same Weie® thawed Ιβΐ are,. They are Bbassö di @ with

In these Ausfütaungsformen facilities are simple Adjustment of the seat height while driving is provided and, as can be seen in particular from FIGS. 1, 2, 3, 6 and 8 is (whose facilities are also in accordance with the execution forms Figures 4 »5 are applicable), also a device with which can adjust the spring stiffness of the suspension while driving,

You provided in the seat suspension according to the invention In both embodiments, resilient devices dampen forward and rearward shocks as well as vertical shocks Vibrations. This is due to the resilience of the resilient devices used against visual stress achieved.

In the embodiment according to FIG. 1, the driver sits on the seat 11 and can easily adjust the seat to the desired height by pressing the handle 88 of the pin holder downwards. ! This will release that pin from its engagement with the notches. When the driver shifts his weight something on his feet, the bias of the resilient means 39 is changed, for example by the! Torsion spring 91 or helical! Tension springs 89 λ "S ¹ O, as described previously. If he wants to lower the seat 11, he only needs to press it a little close down, and when he has reached the desired position, the driver can let go of the handle 88, so that the pin £ 3 can engage in a notch 76, whereby the seats are kept at this desired height.

If the suspension is insufficient while driving, the driver can turn the button 47 in a simple manner, see above

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that the lower end of the spring 39 is as far as the desired Diirchfedermig reached »

In the got n & ok oil © h Biguren 4 mä version, the driver only needs to let Xftift te © n Ifoftbalg flow in or drain it out until the suitable Sltshoh® eisages is divided. The Borohfederiaag toisn gleiahfalla dmreh YardseelieB dee. Button 47 can be changed _§ woctaeii ®fe © Hso tos matere Xoifthalges moved

The Vora "i © ht" asig according to the invention is © is ^ aoh casual in their way of working «sd s © te lightly iastsad su nalträ.

Claims (8)

- 15 claims ,1. Suspension for a vehicle seat with resilience to reduce shocks and vibrations, characterized by a stand (14) for holding the suspension and fastening it to the floor of the vehicle, by a bracket (12) for the vehicle seat and by parallel connecting devices (34, 36 , 37,38), which connect the seat support to the stand, further by (^ lence devices (52) for articulating these parallel locking devices on the stand or, I support, by a resilient device (39 * 101), which results in a displacement per unit of force, and by a device (62,44) for articulating one end of this resilient device to the parallel connecting device (37 »38)> by a device (64,43) for connecting the other end of the resilient device to the seat support (12), by means of a device (79, 82) for adjusting the height of the seat support while the seat is being loaded, and eehliesslich by a device (46, 47) ₉ with the im loaded condition of the seat whose deflection or spring stiffness can be changed. 2. Suspension according to claim 1, characterized in that this stand (14) has a first frame (17) with a first Side wall and one arranged at a distance therefrom second side wall and the seat support (12) a second frame (22) with a first side wall and one at a distance of this arranged second side wall that this parallel connecting device has a first and second lower, spaced and parallel link arms (37 $ 38), said first and second lower link arms 109851/0752 ~ 16 - low-dung is designed so that it forms guideways, that these joint assembly days (52) continue to have bolts (70), with those lower, spaced-apart first and second parallel connecting arms to the first and second Side wall of this first and »wide frames are hinged * whereby these connecting arms und'öieee bolts form a parallelogram form that theee Bijörlchtung »to link the one End of the resilient device (39 »101) at this parallel Connecting device a spring support (62) «one into the Guide tracks sliding bracket (44) »its device (63) sum Linking this PederabstUtsung to this bracket and a. Adjustment device (46,47) for the end position of the resilient device, includes, which protrudes from the front of this suspension and through which this slidable bracket in guide tracks (44) is displaceable, βο that this one end of the resilient Establishment (39 »101) teams are moved, 3. Suspension according to claim 1, characterized in that daas jjf, the resilient device consists of an air suspension (101). ■ ·. ■■ - ■ 4. Suspension according to claim 1 $ characterized in that this resilient device consists of a helical pressure spring (39). 5 ο suspension according to claim 1, This .einrichtung me lnderrog der Buhe of a device (79 _ff 82) ram Äad @ rn ö @ r upper part of this seat support (12) and this resilient device, whereby the resilient device is changeable. 6. Suspension according to claim 1 _P thereby getennsseloteat ,, that 10 9 8 51/0752 this device but change of the height of the support beam (12) Has devices (64 »43, 74) for connecting this other end of the resilient device to the seat support (12), this connecting device comprising an adjustment device (74, 79) for the height of the eyes or the seat, which again has two spaced adjustment plates (74), of at least one with several cuts or Serbs (76) is provided that this seat support (12) first and second spaced side walls and means (77) to articulate this adjustment device for the seat height has these first and second walls, and an adjustment shaft (43) interposed between the opposed adjustment plates (74) is articulated, further means (64) for attaching the other end of the resilient means to this Adjustment shaft (43) for the height adjustment, a pivot plate (79) which is hinged to this first side wall, furthermore a pin (83) protruding from said plate (79), wherein this plate can assume a locking position in which this pin with a selected notch (76) for locking it Adjustment plates (74) locks in a fixed position, whereby the seat support (12) at the desired seat height it is determined that furthermore a handle (88) for pivoting this pin plate (79) into an unlocked position is provided to remove this pin (83) from the notches solve and change the height position, as well as a device for maintaining the bias, this Adjusting shaft (43) in a certain lowered position holds when this pivot plate (79) is in the unlocked position, and that this handle (88) on the front of the construction of the suspension protrudes. 7, suspension according to claim 1, characterized in that a device (98) for limiting the setting height of the 109.8S1 / 0752 Seat support (12) is provided in the unloaded Hnstead and that this device (74 »79) sma lades» the Sitahuhe this! Rage rs a device stm lndesi the Helativstellrag the upper part of this Sitsstrräger (12) edge & i © a © s aade ^ eu Jkides der resilient device (39 »101) umfeuset _e aiit ä @ 3? the tension of this resilient bifurcation has been reduced. . 8. Suspension according to claim 7 ₉ elafereli gakeaB ^ eiclmetg das Sum damping is seen from Sekwingmagea ©, the a © »the lower stand (94) 2sum which is binriohtuag (52), connecting armea (bond Mx ^ qb divides. 10985Ί / 0752 Read 11 e