DE3518903A1 - Suspension for a sprung steering axle of a cross-country tractor vehicle - Google Patents

Abstract

A suspension for a sprung steering axle of a cross-country tractor vehicle is described. The axle beam of the steering axle is supported by its two centrally arranged axle ends running in the vehicle longitudinal direction so that it can oscillate on a link sprung in relation to the vehicle, which link is formed from two support elements running transversely to the vehicle longitudinal direction and accommodating the axle beam between them. In order to increase the ride comfort of a vehicle provided with an axle suspension of this type, the support elements are pivoted with the axle ends on the vehicle frame at a distance from the joints and essentially connected to one another by a cross member in this area only. The transverse link thus formed has a relatively low mass, has a very low unsprung mass and has only a low overall height, which enables the overall centre of gravity of the vehicle to be kept low. <IMAGE>

Description

Suspension for a sprung steering axle of an all-terrain towing vehicle

The invention relates to a suspension for a spring-loaded ^c steering axle of the type described in the preamble of claim 1.

Such a suspension is described in DE-OS 27 k5 BhB for the steering axle of tractors and transport vehicles. A plate-shaped trailing arm, referred to as the so-called üJippe, is hinged to the vehicle frame in front of the steering axle and is cushioned behind the steering axle by means of rubber springs relative to the vehicle frame. On the underside of the trailing arm, spaced apart flanges are arranged as support elements for the axle body and run transversely to the longitudinal direction of the vehicle.

The known suspension has the disadvantage that it takes up a considerable amount of space in the vertical direction and so too a vehicle construction where the focus of the Vehicle is relatively high. This is the case with agricultural tractors, which are often up tight in sloping terrain be operated at the tipping limit for reasons of accident prevention undesirable. In addition, the known axle suspension has considerable unsprung masses that are connected with the relatively hard, short-stroke rubber suspension offers only low driving comfort. For a high level of driving comfort but a relatively soft suspension with large suspension travel is essential. The well-known axle suspension is suitable therefore only for those towing and transport vehicles that

PHONE FPRNSCHREIBER TEL ADDRESS POSTAL CHECK BANK VOLKSIANK. KRCISSPAKKASSE MARKET OBCROOW IAMMEL NO. «41901 DIESELROSiMNDT MONKS «β-« ff HYFO BANK MtK AUOSSUU . COMMERZIANK U. LZS KAUfBEUREN 771 Ot 41 30 · (EfISATZTEILDIEWT) OCUTSCHt Bl 30ΘΑ

XAVER FET

MACHINE AND TRACTOR FACTORY Johann-Georg-Fendt-Straße 4

8952 Marktoberdorf

ANR: 1 D01 523 Fe 1M5 sa - fl 22.05.85

for use on relatively well-leveled traffic areas should come.

Agricultural tractors, the main area of which is often - * = - ■ maize is very uneven terrain, are also relative up to now hard sprung. However, there is also a desire for these vehicles to give the driver a higher level of suspension through soft suspension To offer driving comfort.

1Q In the known vehicle, there are no fundamental issues Difficulties, the 'relatively short-stroke rubber spring ~ by a coil spring or the like with a significantly larger Replace spring bracket. With regard to the most recent Zeit observed a tendency to design the steering axle as a driving axle in agricultural tractors, which is why they were installed so large However, being able to transmit drive power to the ground without damage is a result of the implementation soft suspension causes significant problems. In such vehicles, the drive axle is driven via

2Q a cardan shaft that connects the tractor's manual transmission __ the differential gear housed in the drive axle connects. Now the well-known axle suspension on agricultural Tractors with a drive axis Db transfer, it shows that from the rotation of the drive axis about i + ire longitudinal axis during compression and rebound at the joint on the axis of the cardan shaft The result is deflection angles that significantly reduce the service life of the cardan shaft. Knew these angles of diffraction can be reduced by lengthening the trailing arm, but this made the unsprung one which was already too large

The mass of the suspension continues to increase. Apart from that, one is

PHONE FFRNSCHREIBER TSL AORESSE POSTAL CHECK BANK KREISSPARKASSE MAHKTOBERDORF COLLECT-NH. »41 sol 0IESELROS4FEN0T MÖNCHEN 43 «Y-aO7 HYPO-BANK VOLKSBANK. . COMMERZBANK U. LZB KAUFBEUREN (0B4t) ΪΠ μ 4i on (SPARE PARTS) - OEUTSCHE BANK AUOSBURQ 306A t ^ iiüTED ORiQINAL _Sl

XAVERl

MACHINE AND TRACTOR FACTORY Johann-Georg-Fendt-Straße 4

8952 Marktoberdorf

ANR: 1 0D1 523 Fe 1M5 sa - fl 05/22/85

Any extension of the trailing arm on agricultural tractors is limited due to lack of space.

The object of the invention is to provide a suspension for a sprung steering axle of an all-terrain towing vehicle
“- to create the type described in more detail at the beginning, which in addition to a high car body also offers the possibility of using a driven steering axle, whereby the driving shaft should then be stressed as little as possible by the compression and rebound of the axle body.

The characteristic of the main claim is required to solve this problem suggested.

Due to the proposed design of the axle beam

load-bearing link as a wishbone has succeeded in giving it sufficient stability with a very low overall height. This results in a significantly reduced approximate
~~ changed mass, which in connection with a large suspension uieg offers a considerable gain in driving comfort. In spite of the great suspension, however, it was prevented that the axle body tilts about its longitudinal axis during compression and rebound and thus leads to increasing stress on the drive articulated source in the case of a driven steering axis.

Further advantageous details and features of the invention emerge from the remaining claims and the following description with reference to a drawing. It shows:

PHONE PFRNSCHREISEn TEI..ADB6SSE POSTAL CHECK SAMMtt-HH. ""in the THIS FENOT MÖNCHEN 41 «J-IW [OtK)) 771 Of 41901 (6HSATZTEILDIENiT) 306A

BANK

HYPO-BANK VOLKSBANK, KREISSPAHKASSE MARKTOBEHDORr

ORIGINAL! ^ «" C

XAVERI

MACHINE AND TRACTOR FACTORY

Johann-Georg-Fendt-Strasse 4

8952 Marktoberdorf

ANR: 1 DD1 523 Fe 1M5 sa - fl 05/22/85

1 shows a first embodiment of the inventive Suspension with torsion bar suspension in a perspective Opinion,

Fig. 2 shows a second embodiment of the invention Suspension with different possible arrangements of spring struts seen in a view against the direction of travel,

3 shows the suspension according to FIG. 1 in a view from below,

FIG. K shows the detail A in FIG. 3 on an enlarged scale,

5 shows a third exemplary embodiment of one according to the invention Suspension with zuiei wishbones seen in a view against the direction of travel of the tractor and

FIG. 6 is a front view of an agricultural machine equipped with the suspension according to FIG. 1 Tractor.

In the suspension of Figures 1 and 3, the axle beam is the driven steering axle carrying the steered wheels 2 of an agricultural, otherwise not shown in detail Tractor designated with 1. The axle body 1 consists of additional parts 1a, 1b, of which the axle body part 1b is flanged End region is designed to accommodate a differential gear, also not shown. In the middle between the wheels are located on both sides in the area of the differential gear

- 10 -

TtLEPHONE FINAL LETTER TEk ADDRESS COLLECT-NH. «« Ι on DItSELHOSSFtNDT (0 (142) 771. 0841203 (REPLACEMENT SERVICE)

POSTSCHECK BANK

MÖNCHEN W (D- »07 HYPO-BANK VOLKSBANK, KREIS3PARKASSE MARKTOBERDORF

GERMAN SANK AUOSBUHQ. COMMERZBANK & UB KAUFBEUREN

MACHINERY UN TUG FACTORY Johann-Georg-Fendt-Strasse 4

8952 Marktoberdorf

ANR: 1 001 523 Fe 1415 sa - fl 22.05.85

-ΙΟΙ of the axle body 1 two extending in the longitudinal direction of the tractor Axle stub 3, if, the pivoting bearing of the Axle body 1 are used. The stub axle 4, which points backwards in relation to the direction of travel, is hollow and allows implementation a propeller shaft 5 serving to drive the wheels 2, üielche the gearbox 6 of the tractor with the differential gear connects. For the sake of simplicity, there are no shafts leading therefrom inside the axle body 1 to the wheels 2 shown.

The actual suspension of the steering axle on the tractor takes place with the help of a wishbone 7. This consists of zuiei parallel Supporting elements 8, 9 extending towards one another, which are connected to one another in one of their free end regions via a cross member 10 and thus form a sufficiently stable framework. In the area of the cross member 10 are laterally on the support elements 6.9 zuei hinge pin 11, 12 attached with a common hinge axis 13. The pivot pins 11, 12 are forming a vehicle-side Joint in suitable bearing eyes, designated 14 suspended from the tractor frame 15. So that the steering axis does not have an impermissibly large lateral axis during compression and rebound Experiences displacement, the bearing eyes 14 are arranged so that the pivot pin 11, 12 when the steering axle is not deflected are at the same height as the stub axles 3, 4.

At a distance from the pivot pins 11, 12, the support elements 8, 9 are on the stub axles 3 bzui. 4 mounted, creating a joint is formed around which the AchskSrper 1 can perform a pendulum movement. So that the axle body 1 in its pendulum motion is not obstructed by the traverse 10, this is

PHONE TELEPHONE TEL.-AORESSE POSTAL CHECK COLLECTION NO. 0141 » OIESELROSSFENOT MÖNCHEN 41 «J-eO7 | gD «l rn Ot 41 an (SPARE PARTS SERVICE) 306A

BANK

XAVERF ^ iCO. ^:

MACHINE AND TRACTOR FACTORY Johann-Georg-Fsndt-Straße 4

8952 Marktoberdorf

ANR: 1 DG1 523 Fe 1M5 sa - fl 22.05.85

- 11 -

designed as a U-shaped bracket, which the axle body 1 with ■■ overlaps sufficient distance. Since the axle body 1 already has a significantly lower overall height in the area of the cross member 10 than in the central area in which the differential gear is housed, the entire overall height of the steering axle is practically not increased by the wishbone 7, which despite the large deflection path a tractor design with a relatively low center of gravity results.

For reasons of suspension comfort, the unsprung mass should

the entire suspension must be kept as low as possible. Therefore, to increase the resistance force of the wishbone 7, the support element 9 is extended in the direction of the vehicle longitudinal axis 17 beyond its bearing point on the stub axle k and beyond a point in the free end area of the support element 9

Guide rod 16 articulated on all sides, articulated on all sides supported behind the steering axle on the tractor frame 15. - * In the non-sprung state of the steering axis, the guide rod 16 lies in a horizontal plane.

_ To cushion the steering axle against the tractor, a torsion bar 18 is provided, which is in alignment with the joint axis 13 on the one hand non-rotatably attached behind the steering axle on the vehicle frame 15 and on the other hand by means of its in an internal / toothing of the supporting element 9 engaging external teeth 18a is rotatably connected to this. The internal toothing of the support element 9 is coaxial with the pivot pin 12.

- 12 -

TELEPHONE FFRNSCHREI8ER TEL.ADDRESS POSTSCHECK BANK

COLLECTIVE NB. OS41 »D1ESELROSSFENDT MÖNCHEN 4369-107 HYPO-BANK VOLKSBANK, KREISSPARKASSE MARKTOBERDORF XAVER FENDTT VCO. ^ ^

MACHINERY UNO SCHLEPiPERFABRIK Johann-Georg-Fendt-Straße 4

8952 Marktoberdorf

ANR: 1 001 523 Fe 1415 sa - fl 22.05.85

- 12 -

3, the hinge axis 13 and the torsion bar 18 are inclined at an angle CA1 relative to the longitudinal axis 17 of the tractor, and the articulation point of the torsion bar 18 on the tractor frame 15 is less than the attachment point from the longitudinal axis 17 of the tractor des Drehatabes 18 in the support element 9. This measure results from the fact that the articulation point of the guide rod 16 on the support element 9 during compression and rebound of the steering axis in the longitudinal direction of the tractor as a result of the deflection of the guide rod 16 from its normal position to the rear. With the torsion bar 18 aligned in the longitudinal direction of the tractor, this phenomenon would lead to a self-steering behavior of the steering axis during compression and rebound, which significantly makes the driver feel the hand roll over the tractor. Due to the intended inclination of the torsion bar. 18, however, the point of articulation of the guide rod 16 on the support element 9 during compression and rebound of the steering axis is displaced backwards at least approximately by the distance by which the projected length of the guide rod 16 appears to be shortened in the top view. Small, not be eliminated for reasons of design differences are absorbed by the k shown in detail in Fig. Elastic storage. The process described is additionally supported by the articulation of the guide rod 16 in such a way that the distance of their articulation point on the Schiepperrahraen 15 to the longitudinal axis 17 is smaller than the corresponding distance of their articulation point on the support element 9. This measure leads to the apparent length of the Guide rod 16 does not change as much during compression and rebound as when the guide rod 16 is parallel to the

Vehicle longitudinal direction would be arranged.

. ₁ 3. ORiSINAL tft ** ECTED

TELEPHONE FFBN WRITER TEU-AORESSE POSTSCHECK BANK

XAVERI

MACHINE AND TOW FACTORY

Johann-Georg-Fendt-Strasse 4

8952 Marktoberdorf

ANR: 1 001 523 Fe 1415 sa - fl 05/22 B5

- 13 -

In the exemplary embodiment according to FIG. 1, the cushioning takes place the steering axis with the aid of a torsion bar 18. tu ie from FIG. 2 can be seen, the steering axle can also be loaded in a known manner from a spring and a shock absorber. 5._ suspended struts. For this, FIG. 2 different attack possibilities of such struts 19,20,21 shown on a wishbone 7.

In the exemplary embodiment according to FIG. 5, the steering axis is with the help of two wishbones 22,23 via bolts 2 **, 25, which on

With respect to the longitudinal axis 17 are arranged opposite sides, arranged on the tractor frame 15. In detail, a two-armed lever 25 is rotatably mounted on each of the stub axles 3, U , its upper free lever arms 26a above bolts 27 with the support elements 28 of the upper wishbone 22 and its lower free lever arms 26b via bolts 29 with the support elements 30 of the lower wishbone 23 are articulated. In this exemplary embodiment, too, the joints (bolts 27, 29) of each wishbone 22, 23 are at the same height as the anchoring points (bolts Zk ₁ 25) on the tractor frame 15, which ensures that the steering axle springs in and out although the levers 26 pivot together, the steering axis itself is not laterally offset.

In the embodiment according to FIG. 6, the suspension is

provided with a device that ensures that the steering axis not just one more when fully compressed can perform a sufficiently large pendulum movement, but also cannot pendulum so strongly even in the fully rebounded state,

TEt-EFON FFBN FLAG THL ADDRESS POSTAL CHECK COLLECTION-Nfl. 094130t THIS EINOSSFENDT MONKS «0-807 (OB «) 7Π μ 4i on (SPARE PARTS) 306A

HYPO-BANK VOLKSSANK, KREISSPARKASSE MARKTOBERDORF

DEUTSCHE BANK AUQSSURQ. COMMERZBANK & LZB BUY

ORJSINAL ΙαΙϊΈΰ

XAVERI

MACHINE AND TRACTOR FACTORY Johann-Georg-Fendt-Straße 4

8952 Marktoberdorf

ANR: 1 001 523 Fe 1415 sa - fl 22.05.B5

- 14 -

that the wheels 2 with structural parts of the tractor, uiie z. B. the bonnet 31, collide and possibly damage it. To thus the Pendeluiinkel the steering axis independently to keep the deflection at least approximately constant, are on the top of the axle body 1 on both sides of the longitudinal axis17 of the tractor at a sufficient distance from each other zuiei farm pieces 32,33 arranged with zuiei tractor-fixed stops 34,35 cooperate. So that the Desired purpose is achieved, each shaped piece 32,33 is provided with a stop track 32a, 33a, which depends on the deflection of the steering axle differently to the axle body 1 located areas for interaction with the associated Stop 34, 35 provides.

In the embodiment shown, the stop tracks are 32a, 33a are curved, with an inner region close to the axle body gradually merging into an outer area further away from the axle body Area transitions. lilenn, as in the left part of Fig. 6 is shown, the steering axle is fully rebounded, in the shown pendulum position of the axle body 1, the outer, The area of the molded piece 32 remote from the axis body and the stop 34 together. Accordingly, as in the right part of Fig. is shown, with the steering axle fully compressed, the inner, The area of the farm piece 33 close to the axle body together with the stop 35.

WSiECTED

PHONE TELEPHONE TEL ADFIESSE POSTAL CHECK COLLECTION NO. 01ESELROSSFEN0T Monks α ta-an Ιΐα «Ι τη M 41 30) (SPARE PARTS SERVICE) 306A

BANK

Claims (1)

PATENT CLAIMS 1. Suspension for a sprung steering axle of an all-terrain vehicle Towing vehicle, in particular an agricultural one - 5 - usable tractor, with the axle beam centered around two Axle stub running in the longitudinal direction of the vehicle can be pivoted on one that is hinged to the vehicle and is sprung against it Handlebars with zuiei the axle beam between them, supporting elements running transversely to the longitudinal direction of the vehicle are mounted, characterized, ~~ that the supporting elements (B, 9) a) at a distance from that formed with the stub axle (3, * O Joint Above a joint on the vehicle side (Pivot pin (11,12); bearing eye (HO) with essentially "" "" running joint axis (13) eccentrically on the drive are articulated, and b) in the area of the vehicle-side joint (joint _ pin (11,12); Bearing eye (1 * 0) forming a Rigid wishbone (7) by a traverse (10) are connected. 25 2. suspension according to claim 1, characterized in that the traverse (10) is designed as a U-shaped bracket. lft $ J »ECTEB PHONE OPEN WRITING TEL ADBESS POSTAL CHECK 8 AMMCl-NO. Of 41 201 0IESELRO5SFENDT MONKS 41 (3-107 (OH «) 771 M 4131 »(REPLACEMENT PARTS) 306A HYPO-BANK VOLKSBANK, KREISSPARKASSE MARKTOBEFtOORP DEUTSCHE BANK AUQSBURa. COMMERZBANK & LZB KAUFBEUREN ^ I XAVER f MACHINE AND TRACTOR FACTORY Johann-Georg-Fendt-Straße 4 8952 Marktoberdorf ANR: 1 D01 523 Fe 1415 SB - fl 22.D5.B5 3. Suspension according to claims 1 and 2, characterized in that that the rear support element (9) seen in the direction of travel extended beyond the pivot with the axle body (1) is, and that at least one when the vehicle is not compressed etuta horizontally and in the longitudinal direction of the vehicle extending guide rod (16) is provided, which is preferably articulated on all sides as well as on the vehicle is attached in the free end region of the support element (9). 4. suspension according to claims 1 to 3, characterized in that preferably the rear support element viewed in the direction of travel (9) coaxially with the pivot pin (12) has internal teeth into which one in its other end area The torsion bar (18) mounted on the vehicle engages with a corresponding external toothing (18a). 5. suspension according to claims 1 to 3, characterized in that the rear support element (9) in its free end region is connected to a strut (21) supported on the vehicle. 6. Suspension according to claims 1 to 3, characterized in that that in the articulation area of the wishbone (7) on the vehicle the support elements (8,9) and / or the cross member (10) spring struts (19,20) are articulated. ORIGINAL Si4S * ECTED. ^ - 3 - COPY TELEPHONE OPENER TEL ADDRESS POSTSCHECK BANK IAUUEL-NR «11 Xn DIEaEUUJWiNlJT UONCHEN CD-« 07 HYPO- (ANK VOLXSBANK. KRlIiSMHKASSE UASICTOMROOHf XAVER P *** "*" ¹ " ¹ β"'"···»»-' ^ MACHINE AND TRACTOR FACTORY Johann-Georg-Fendt-Stiaßfe 4 8952 Marktoberdorf AIMR: 1 DD1 523 Fe 1415 sa - fl 22.05.85 7. Suspension according to one or more of the preceding Claims 1 to 6, characterized, that the hinge axis (13) of the vehicle-side joint : - 5_. (Pivot pin (11,12); bearing eye (1O) of the wishbone (7) Seen from above at an angle ((TC) to the longitudinal axis of the vehicle (17) runs. 8. suspension according to one or more of claims 1 to 7, characterized in that the wishbone (7) has elastic joints on the vehicle is hinged. 9. suspension according to claims k and 7, characterized, that the torsion bar (16) with the hinge axis (13) of the vehicle-side Joint (pivot pin (11,12); bearing eye (1 * 0) of the Control arm (7) is aligned. 10. Suspension according to claims 1 to 9, characterized in that that both the attachment of the torsion bar (18) and the articulation of the guide branches (1S) on the vehicle in the direction of travel seen behind the axle beam (1). 11. Suspension according to claims 1 to 10, characterized in that that the articulation of the guide rod (16) on the vehicle in one smaller distance from the vehicle longitudinal axis (17) takes place than the linkage on the wishbone (7). BANK hypo-bank volksbank. Kreissparkasse uarktoberdorf german bank auqsburq. Commerzbank and lzb Kaufbeuren 306A OPEN WRITER TEL ADDRESS - k - PHONE OS 41 301 DIESEL BOMFENDT POSTAL CHECK »AUUEL-ΝΛ. 06 «to (SPARE PART SERVICE) vioNCHEN aa-mr IDBO) 7Π IWVWV XAVER FENDT & CO. MACHINE AND TRACTOR FACTORY Johann-Georg-Fendt-Strasse 4 8952 Marktoberdorf ANR: 1 001 523 Fe 1415 sa - fl 22.05.85 12. Suspension according to any one of several of claims 1 to 11, characterized by the following features: a) On each stub axle (3, 4) of the axle body (1) a two-armed lever (26) is mounted, b) the mutually corresponding arms (26a, 26b) of the identically aligned levers (26) are with the Supporting elements (28,30) each of a wishbone (22,23) articulated, c) the wishbones (22, 23) are mounted on the vehicle on opposite sides of the vehicle's longitudinal axis (17) and d) are in the unsprung state of the axle body (1) the vehicle-side articulations of the wishbones (22,23) and the joints of the support elements (28,30) with the arms (26a, 26b) at the same height. 13. Suspension according to one or more of claims 1 to 11, characterized in that that the size of the Pendeluiinkels of the axle body (1) is independent of its deflection is at least approximately constant. Suspension according to claim 13, characterized in that to limit the pendulum angle on the axle body (1) two fittings (32,33) are attached, each with zuiei stops (34, 35) located on both sides in the area of the axle body (1) on the vehicle interact, the shaped pieces (32,33) a stop track (32a, 33a) with an axle body near it COPY PHONE FFBNSCHREISER TEl-AORESSE SAUUEL-NO OS 41 ΖΠ DIESELROtSFENDT IOC «) TTl MiIMI (SPARE PARTS POSTSCHECK BANK MÖNCHEN <J «3-« J7 HYPO-BANK VOLKS (ANK. KREISSPARKASSE MARKTOBEHDORF GERMAN! BANK AUOSlUtKL COUMEIUBANK & LZB BUOPS ο υ ι υ ^ / uj XAVER FENDT & CO. MACHINE AND TRACTOR FACTORY Johann-Georg-Fendt-Strasse 4 8952 Marktoberdorf ANR: 1 001 523 Fe 1M5
sa - fl
22.D5.85 and have an end region remote from the axle body, of which the end area close to the axle body when fully compressed and the end area remote from the axle body with fully extended AchskBrper (1) interacts with the stop (3 ^, 35). 15. Suspension according to claims 13 and 14, characterized in that the stop track (32a, 33a) is curved. original w-v PHONE f PHONE DISC TEL ADDRESS POSTAL CHECK - K77 BANK KREI8 SPARKASSE WMMCL-NX. ce 41 3tn DIESELnOaaFENOT MONKS 43 (3 HYPO-BANK VOLKSBANK. COMI UERZSANK U (o ty ui TTi «41203 (EnSATZTtlLDIENSr, DEUTSCHE BANK AUOSBUnn