CN2309244Y - Shock frame for vehicle seat - Google Patents

Abstract

The utility model belongs to a shock damping frame for a vehicle seat. The shock isolator for a vehicle seat is composed of a seat cushion frame, a scissor-shaped arm, a shock damper, a damping spring, a lever and a manual type or an automatic type force arm regulating mechanism. The shock damping frame for a vehicle seat is characterized in that the damping spring can manually or automatically slid or lock along the lever, so the force arm of elastic force of the damping spring to the lever is changed to be balance to the weight of passengers. The utility model is easy to balance. For passengers with different weight, the utility model can automatically or easily manually complete the balance adjustment within a larger weight range without changing the pulling force of the damping spring. In addition, the manual type force arm regulating mechanism can also adjust the height of a seat.

Description

Vehicle seat vibration-absorbing mounting

The utility model relates to a kind of vehicle seat vibration-absorbing mounting, belongs to vehicle seat shock attenuation unit.

The vibration-absorbing mounting that is installed between vehicle floor and the seat can improve travelling comfort greatly.During vehicle ', under the damper spring effect, the cushion Supporting fixture of vibration-absorbing mounting vertically vibrates.Its limit of sports record position is called " going up the summit " and " following summit ".Distance between them is called " spacing stroke " (Fig. 1).After being loaded with the occupant, too high or too low as the equipoise of vibration-absorbing mounting cushion Supporting fixture, when meeting bigger vibration, the cushion Supporting fixture will be on last summit or down the place, summit be violently shaken, i.e. " bottoming " or " rushing to summit " damaged occupant's traveling comfort.Therefore, to the different weight occupant, the equipoise that should regulate vibration-absorbing mounting cushion Supporting fixture is to suitably highly, to avoid the bottoming or the phenomenon of rushing to summit.This process is called " balancing ".The opposing party and, if damper spring rigidity is very high, even the vibration bottoming or the phenomenon of rushing to summit also not necessarily appear in different weight occupant balancing not.The vibration damping seat of some type adopts hard damper spring to avoid this adjusting in order to get around the difficulty of adjustment just.But because with there being frequency to be directly proportional, so the vibration-absorbing mounting natural frequency of band hard spring is very high, usually more than 3Hz with the square root of damper spring rigidity.And natural frequency is higher, and effectiveness in vibration suppression is just poorer.When the vibration-absorbing mounting of every use soft spring (with have frequency can be lower than 1.2Hz) thereby good damping result, occupant's body weight have bigger variation, all must carry out balance again inevitably.The existing vibration-absorbing mounting of this type all adopts the method that changes the damper spring deflection to carry out balance.Relatively as shown in Figure 1, it is made up of parts such as cushion Supporting fixture 4, scissor arm 5, damper spring 10, screw rod 7, nut 6, bumper 9, underframe 8, slide block 1 and 11, roller 3, rolling wheel support 2 and levers 12 representative type a kind of (Chinese patent application number 96233823.0).Cushion frame 4 is positioned at the place, summit under the state of nature.After the occupant took, cushion Supporting fixture 4 moved down, make roller 3, rolling wheel support 2 and with its weldering be that the lever 12 of one rotates around hinge 13, damper spring 10 is elongated.If spring power still was not enough to and occupant's body weight balance when cushion Supporting fixture 4 moved down near the spacing midstroke, or it is opposite, when it arrives herein far away spring power with occupant's body weight balance, then necessary rotating screw bolt 7, drive with the weldering of spring right-hand member for the nut 6 of one to the right or be moved to the left, with the deflection of increase and decrease spring 10, when cushion Supporting fixture 4 is near spacing midstroke till spring tension and the body weight balance.The problem of this balance method is: 1. owing to damper spring 10 pulling force under the mode of operation are done newton up to number, and general damper spring is arranged as two, so as carry out balance adjustment with Wrench, for up to 1～3 minute, and very require great effort, this will cause the frequent seat vibration-absorbing mounting (as passenger's seat vibration-absorbing mounting) changed of occupant actually to use.As use electric device instead and carry out balance adjustment, then increased cost greatly.2. the soft spring effectiveness in vibration suppression is more much better than hard spring, but it to have very big distortion could with big body weight balance, limited by the locus, the occupant bigger to body weight, soft damper spring can't reach state of equilibrium, so occupant's body weight range of balance is restricted.In addition, existing vibration-absorbing mounting technology can not be regulated the seat height.

The purpose of this utility model is the vehicle seat vibration-absorbing mounting that good damping result is provided and is easy to balance, to the different weight occupant, needn't use Wrench or electric device can be easily and promptly in big weight range automatic or manual finish balance adjustment, can also realize the adjusting of seat height in case of necessity.

The purpose of this utility model is achieved through the following technical solutions: at one by the cushion Supporting fixture, inside and outside scissor arm, in the vehicle seat vibration-absorbing mounting that damper spring and bumper are formed, the lever and the scissor arm of band chute are rigidly connected, and damper spring is by attaching parts and described band chute lever sliding block joint.Make damper spring that the certain deformation amount is arranged before vibration-absorbing mounting dispatches from the factory, promptly have certain elastic force.By the effect of arm of force regulating mechanism, but damper spring and attaching parts side travel thereof, with the lever arm of force size of regulating spring elastic force.Here " side travel " that reaches said damper spring hereinafter both can the thrum spring be parallel to the moving along the lever axial direction of self axis, can refer to that also it makes little corner around one apart from the enough hinges at a distance of described lever and rotate, this rotation is big because of radius, corner is little, very approaching parallel moving.Above-mentioned side travel is realized to reduce resistance by ball bearing of main shaft or roller.Arm of force regulating mechanism also can be kept adjusted good arm of force size reliably when the vibration-absorbing mounting normal operation constant.It can be automatic or manually operated.Needn't change the size of damper spring deflection and elastic force, only must change the distance of resilient force line, promptly change the size of lever arm of force, can realize balance passenger's body weight to the lever center of turn.

A kind of scheme of described arm of force regulating mechanism is a manual type.In the relatively-stationary occasion of occupant, as the chaufeur seat, often balancing can adopt this scheme.Arm of force manual adjustment means is made up of handwheel and screw mechanism and Transmission.When needing balance, rotate handwheel and screw mechanism, make Transmission laterally promote damper spring and attaching parts certain distance thereof, thereby change its lever arm of force to realize balance.Transmission direction because of screw mechanism after loosing one's grip is irreversible, so lever arm of force remains unchanged.If spacing stroke is increased, change lever arm of force and can also make the seat height adjusted simultaneously.

The another kind of scheme of arm of force regulating mechanism is a self acting.In the frequent occasion of changing of occupant, as passenger's seat vibration-absorbing mounting, need frequent balancing, can adopt this scheme.Use the occupant of this vibration-absorbing mounting needn't do any action, the meeting of porpoising up and down that cushion frame produces voluntarily during vehicle ' makes its mid point that automatically is adjusted to spacing stroke, realizes balance.The occupant also has equifinality with buttocks with porpoising several times about the seat.

Above-mentioned purpose realizes with following technical scheme.As shown in Figure 2, cushion frame normal vibration scope is represented with " forced stroke " under the vibration-absorbing mounting state of equilibrium, and forced stroke and two segment distances that form between the summit up and down are called " going up the stepping stroke " and " following stepping stroke ".Arm of force automatically regulating mechanism is made up of stepping mechanism, Transmission and catch gear.In the forced stroke, catch gear makes lever arm of force two-way reliable locking up and down, makes it to remain unchanged.At this moment when the vibration-absorbing mounting lack of equilibrium was good, its porpoising meta (being the equipoise of cushion frame) was positioned at the top (or below) of spacing midstroke, went up stepping stroke (or following stepping stroke) and was in the porpoising scope of cushion frame.In a single day cushion frame enters in the stepping stroke, catch gear is the unidirectional locking of loosening upward to (or downward direction), stepping mechanism begins effect simultaneously, the Transmission that unidirectional promotion and damping elastomer element have an annexation in whole stepping stroke upwards (or downwards) moves, this Transmission laterally make progress again (or downwards) promote damper spring and attaching parts thereof, thereby reduce (or increase) its lever arm of force.Cushion frame arrive to be gone up behind the summit (or summit) down when back mobile, and stepping mechanism and above-mentioned Transmission disengage, so lever arm of force remains unchanged.In a single day cushion frame is got back in the forced stroke, and catch gear promptly recovers the bidirectional locking to lever arm of force.When cushion frame makes progress (or downwards) porpoising once more, will repeat said process.So one by one lever arm of force being reduced (or increase) arrives till the vibration-absorbing mounting realization balance.After this cushion frame is in the normal vibration mode of operation, no longer enters into up and down in the stepping stroke.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is a kind of existing vibration-absorbing mounting sketch (Chinese patent application number 96233823.0).

Fig. 2 to Figure 13 is the utility model diagram.

Fig. 2 is manual bogie type vibration-absorbing mounting (embodiment a 1) schematic diagram of mechanism.

Fig. 3 is explanation manual bogie type (embodiment a 1) vibration-absorbing mounting height adjustment schematic diagram.

Fig. 4 is manual bogie type vibration-absorbing mounting (embodiment a 1) shaft side figure.

Fig. 5 is automatic balance type vibration-absorbing mounting (embodiment a 2) schematic diagram of mechanism.

Fig. 6 is automatic balance type vibration-absorbing mounting (embodiment a 2) arm of force automatically regulating schematic diagram of mechanism.

Fig. 7 is automatic balance type vibration-absorbing mounting (embodiment a 2) shaft side figure.

Fig. 8 is that automatic balance type vibration-absorbing mounting (embodiment 2) arm of force regulating mechanism amplifies shaft side figure.

Fig. 9 is the shape and the control position shaft side figure thereof of automatic balance type vibration-absorbing mounting (embodiment 2) Transmission 33.

Figure 10～12 are several versions of automatic balance type vibration-absorbing mounting (embodiment 2) arm of force regulating mechanism.

The schematic diagram of mechanism of the form that is slidingly installed of Figure 13 damper spring left end hinge.

Fig. 2,4 is embodiment 1 of the present utility model, is manual type, symmetrical structure.Fig. 2 is a schematic diagram of mechanism, and Fig. 4 is three-dimensional shaft side figure full figure.For ease of expression, this figure is that section cuts open into two parts (but handwheel 15, screw rod 17, nut 16 and lifting plate 18 do not cut open) with vibration-absorbing mounting with the plane of symmetry, and separates certain distance.Cushion Supporting fixture 4, with scissor arm in hinge 21 (Fig. 2) bonded assembly 5 and outer scissor arm 23, bumper 9 (not drawing bumper among Fig. 4) and damper spring 10 arts as prior art.With the lever 20 and interior scissor arm 5 weld togethers of band chute, the two can rotate around hinge 14 as a rigid body.Damper spring 10 left ends link to each other with square steel (or channel-section steel) 25 by plug 61, screw rod 24.Square steel (or channel-section steel) 25 is drilled with unthreaded hole so that screw rod 24 passes.Square steel (or channel-section steel) 25 can rotate around 26 centers of the ball bearing of main shaft on the lower carrier plate 30.Damper spring 10 right-hand members are connected with lift shaft 19 by attaching parts 27, bearing 28.The chute that lift shaft 19 is passed again on the described lever 20 simultaneously.Following handle can be collectively referred to as " damper spring parts " around above-mentioned part damper spring 10, plug 61, screw rod 24, square steel 25, attaching parts 27, the bearing 28 of bearing 26 axis rotation as one.The axis of damper spring 10 is called " damper spring elastic force lever arm of force " to the distance at hinge 14 centers.The arm of force regulating mechanism of present embodiment by handwheel 15 and the screw rod 17 that is attached thereto, nut 16 and with its weldering be that lifting plate 18, lift shaft 19 and the peace bearing 60 thereon of one formed.Have a horizontal elongate slots on the lifting plate 18, lift shaft 19 can be rolled by about bearing 60 is in groove.The user needn't adjust again after damper spring 10 obtained certain elastic force by rotating screw bolt 24.In the time of need carrying out balance, rotating handwheel 15 rotates screw rod 17, nut 16 and lifting plate 18 just make progress (or downwards) move, thereby upwards (or downwards) promotes lift shaft 19, make it along lever 20 axially make progress (or downwards) move, so just changed the lever arm of force size of spring 10 elastic forces, make vibration-absorbing mounting can with the different weight balance.During normal operation, under the effect of damper spring power, cushion Supporting fixture 4 up-down vibration, scissor arm 5 and lever 20 are around hinge 14 swings, damper spring 10 right-hand members and lift shaft 19 side to side vibrationss.Lifting plate 18 receive from lift shaft 19 a certain size upper and lower to the effect of power, but, make the lever arm of force of spring force constant because of the constraint of nut 16 and screw rod 17 keeps motionless.

Above-mentioned lever 20 can not slotted yet, because lever 20 always works under the pulling force of damper spring, so the lift shaft 19 of not slotting can not come off from it yet.The mounting hole of the bearing 26 on the lower carrier plate 30 can make the elongated slot of a vertical direction into, and above-mentioned like this damper spring parts left end hinge (being ball bearing of main shaft 26) just can be along its scroll-up/down, and its schematic diagram of mechanism as shown in figure 13.Less because of the ball bearing of main shaft resistance, when the spring members right-hand member was pushed, it also can move because of the effect of spring power overcomes bearing resistance simultaneously at end.

The spacing stroke of cushion frame 4 is by the length decision of the horizontal slot of upper supporting plate 29 and lower carrier plate 30.The enough stool of its length can make spacing stroke reach about 140mm size, and vibration-absorbing mounting vibratility adjustment working properly (peak-to-peak value) only need about 50-60mm, and unnecessary stroke can be used for regulating its static balance height.Its principle is as follows: suppose that the seated back of occupant has mixed up balance with handwheel 15.Its cushion frame static balance highly is positioned at spacing midstroke, and at this moment lever 20 is the upright position, as shown in Figure 2.Increase the seat height if desired, can rotate handwheel 15 again, move down damper spring 10 right-hand members to increase the arm of force of its elastic force to lever 20.At this moment spring force will pull to left to lever 20, cushion frame 4 be raise, as shown in Figure 3.

Fig. 5～9 are embodiment 2 of the present utility model, belong to automatic balance type, symmetrical structure.Fig. 5 is the present embodiment schematic diagram of mechanism.Fig. 6 transfers the book schematic diagram of mechanism automatically for the arm of force.Fig. 7 is a present embodiment shaft side figure (not drawing bumper).For ease of expression, figure cuts into two parts open, and separates certain distance.Fig. 8 is the local shaft side figure that amplifies of arm of force regulating mechanism.Fig. 9 is mainly used in the part shape of expression Transmission 33 and the installation relation of lift shaft 19, and some relevant parts also are drawn on this figure, and other parts then are removed.Present embodiment prior art part, lever 20 are identical with embodiment 1 with the damper spring parts.Different is arm of force automatically regulating mechanism, and it is made up of stepping mechanism 51 (Fig. 5), Transmission 33 and catch gear 52 (Fig. 5).Transmission 33 space structures are complicated slightly, thereby represent its shape and control position with Fig. 9 separately.Fig. 6 represents stepping mechanism parts 51 and catch gear parts 52 roughly with square frame, and its details is seen Fig. 6 and Fig. 8.For simplicity's sake, 33 of Transmissions have been drawn its partial contour among Fig. 6, and details is seen Fig. 9.Stepping mechanism is made up of push shaft 36, the pushing block 38 that has two inclined-planes, guide shaft 39 (two), stage clip 42, last roller 37, following roller 43 and last lower baffle 35 and 44.Push shaft 36 is installed on the interior scissor arm 5, and passes the horizontal slot on the pushing block 38.When interior scissor arm 5 rotates, push shaft 36 will promote pushing block 38.Two rotating guide shafts 39 that are installed on the riser 53 pass from the vertical guide groove of pushing block 38, and making it can only vertical shifting.Stage clip 42 is pressed in roller 37,43 on the plate washer 35,44.The latter makes between two inclined-planes of pushing block 38 and the roller 37,43 certain interval respectively, and the size in these two gaps is corresponding with forced stroke shown in Figure 5.When doing normal vibration in vibration-absorbing mounting balance forced stroke fortunately, because of the existence in described gap, pushing block 38 can not promote roller 37,43 and Transmission 33, just can not change the lever arm of force of the elastic force of damper spring 10 yet.The part shape of Transmission 33 as shown in Figure 9.Shown in Fig. 6,8,9, be installed in guide shaft 34,45 on the riser 53, rotating and from the vertical guide groove of Transmission 33, pass, and lift shaft 19 is passed from its horizontal guide groove.The effect of Transmission 33 is that the catenary motion of stepping mechanism is passed to lift shaft 19, realizes the adjusting of the spring arm of force.Catch gear by vee-block 31, stage clip 48, on lock roller 32, locking roller 47, fork arm 41, minor axis 40, little axle 46 and stripe board 50 are formed down.Dogleg section is arranged at stripe board 50 two ends so that mobile roller 32 or 47.The angle on the inclined-plane on pushing block 38 and the vee-block 31 makes it to produce self-locking action all less than friction angle.Vee-block 31 is fixed on the riser 53, stage clip 48 with two locking rollers 32,47 be pressed on vee-block 31 tiltedly and on.Because of self-locking action, when locking roller 32,47 was pressed on tiltedly going up of vee-block 31 by stage clip 48, Transmission 32 can not move.Fork arm 41, minor axis 40 and stripe board 50 are used for removing 33 lockings of 32,47 pairs of Transmissions of locking roller.Pushing block position shown in the figure is occupant's body weight good corresponding dead position of balance.At this moment pushing block 38 line of centerss (axis of fork arm 41) overlap with the symmetry two of two rollers 37,43 and plate washer 35,44.Present embodiment is mainly used in passenger's seat, does not generally need to regulate height, gets final product so forced stroke is taken as the normal vibration stroke.

The following describes the equilibrium process of embodiment 2.Suppose that vibration-absorbing mounting before balanced each other with light occupant's body weight, damper spring elastic force lever arm of force is less relatively.Change now by the bigger occupant of a body weight and take.Bigger body weight will make the equipoise of cushion frame 4 equipoises and pushing block 38 reduce.If this moment is occupant's porpoising cushion frame 4 (or porpoising about cushion frame 4 produces voluntarily during running car, effect is identical) up and down, then pushing block 38 with corresponding be the center porpoising with lower equipoise.This porpoising is asymmetric with respect to two rollers, 37,43 positions.During the downward porpoising of cushion frame 4, push shaft 36 promotes pushing blocks 38 downwards, and fork arm 41 is promoted by pushing block 38 again and rotates around little axle 46, drives on the stripe board 50 to move.When cushion frame 4 moves down in the following stepping stroke shown in Figure 5, the following dogleg section of stripe board 50 will be locked on the roller 47 down and be lifted, and remove the locking that Transmission 33 is moved downward.After this ramp of pushing block 38 contacts with last roller 37, and it tightly is pressed on the Transmission 33 because of self-locking action.The friction force that crunch produces will force Transmission 33 to move down with pushing block 38, last roller 37, thereby promote lift shaft 19 downwards, increase the lever arm of force of damping elastomer power.When cushion frame 4 upwards returned, pushing block 38 also returned simultaneously and moves, and at this moment its ramp self-locking action disappears, and lower inclined plane still can not contact with following roller 43, and the while is because of the locking effect of last locking roller 32, so Transmission 33 play that can not make progress at this moment.Pushing block 38 is got back to when continuing to move up behind its equipoise, because of the equipoise is lower than the symmetry of two roller axis, so as long as seat porpoising amplitude is not excessive, pushing block 38 lower inclined planes just can not arrive and following roller 43 position contacting.Even extreme case lower inclined plane down contacts and promote to move on the lift shaft 19 segment distance with following roller 43, its size also can only be the aforementioned sub-fraction that moves down distance.Therefore coming and going the once total effect of porpoising is that lift shaft moves down a segment distance, and promptly spring power lever arm of force increases a certain size.Repeat above process up to realizing making cushion frame till near the balance spacing midstroke.To the situation that occupant's body weight lightens, equilibrium process and described process are similar, and just direction is opposite, and lever arm of force of every porpoising reduces a certain size.

Stepping mechanism can have several different forms in the described arm of force automatically regulating mechanism.The roller 37,43 that Figure 10 replaces among Fig. 6,8 with the prism 54,55 of being with the inclined-plane.Figure 11 and Figure 12 are respectively with prism 56 and roller 57 and 37, the 43 and stage clips 37 of two stage clips 58,59 two rollers of replacement that have two inclined-planes.

The utility model has replaced directly the stretch balance mode of damper spring of existing vibration-absorbing mounting technology with the variable lever balance mode of the arm of force.Because it is much smaller that the resistance when changing lever arm of force is compared with the damper spring elastic force, thereby the utility model has thoroughly been broken away from the equilibrium process of the sort of loaded down with trivial details effort in the past.The manual type vibration-absorbing mounting can easily carry out balance adjustment rapidly, can regulate the seat height easily again, is particularly suitable for chaufeur and uses.The self acting vibration-absorbing mounting has been realized self-equalizing, and this makes the frequent passenger's seat vibration-absorbing mounting that change, that in the past at all can't use of occupant have practicality.The utility model body weight setting range is very wide.From mechanics principle, it can balance body weight be directly proportional with described lever arm of force size.Thereby if the suitable lever length of design, can the enough big body weight of balance.Simultaneously less because of the lever piece size, overcome the problem that perplexs the insufficient space of prior art.

Claims (6)

1, a kind of vehicle seat vibration-absorbing mounting, comprise cushion frame (4), scissor arm (5), (23), bumper (9) and damper spring (10), it is characterized in that lever (20) captives joint with scissor arm (5), can rotate around hinge (14), and be provided with the end that makes damper spring (10) and slide or the arm of force regulating mechanism of locking along lever (20).

2, vehicle seat vibration-absorbing mounting according to claim 1, it is characterized in that described arm of force regulating mechanism is made up of handwheel (15), screw rod (17), nut (16), lifting plate (18) and lift shaft (19): handwheel (15) connects as one with screw rod (17), nut (16) connects as one with lifting plate (18), lift shaft (19) is passed the elongated slot of lifting plate (18) by bearing (60), pass attaching parts (27) by bearing (28), and be pressed on the lever (10).

3, vehicle seat vibration-absorbing mounting according to claim 2 is characterized in that upper supporting plate (29) and lower carrier plate (30) have long horizontal slot, so as with handwheel (15) regulate cushion frame (4) be loaded with behind the occupant static balance highly.

4, vehicle seat vibration-absorbing mounting according to claim 1 is characterized in that described arm of force regulating mechanism is made up of stepping mechanism, Transmission (33), lift shaft (19) and catch gear; Described stepping mechanism is made up of push shaft (36), the pushing block (38) that has two inclined-planes, guide shaft (39), stage clip (42), last roller (37), following roller (43) and last lower baffle (44) and (35): push shaft (36) is installed on the interior scissor arm (5), and passes the horizontal slot of opening on the pushing block (38).Two the rotating guide shafts (39) that are installed on the riser (53) pass from the vertical guide slot of pushing block (38): stage clip (42) is with roller (37), (43) be pressed in plate washer (35), (44) on, two inclined-planes of pushing block (38) and roller (37), (43) certain interval is arranged: be installed on the riser (53), rotating guide shaft (34), (45) from the vertical guide groove of Transmission (33), pass, lift shaft (19) is passed from the chute of its horizontal slot and lever (10): described catch gear is by vee-block (31), stage clip (48), last locking roller (32), following locking roller (47), fork arm (41), minor axis (40), little axle (46) and stripe board (50) are formed: vee-block (31) is fixed on the riser (53), stage clip (48) is with two locking rollers (32), (47) be pressed on vee-block (31) tiltedly and on: stripe board (50) goes up that there is dogleg section at two ends so that move locking roller (32) or (47): be positioned on the open slot that minor axis (40) on the pushing block (36) is arranged in fork arm (41), fork arm (41) can the little axle (46) of (53) rotates on the riser around being fixed on.

5, vehicle seat vibration-absorbing mounting according to claim 4 is characterized in that replacing described roller (37), (43) with prism (54), (55) on band inclined-plane.

6, vehicle seat vibration-absorbing mounting according to claim 4 is characterized in that replacing roller (37), (43) with prism (56) that has two inclined-planes or roller (57), replaces single stage clip (37) with two stage clips (58), (59).

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