GB2128941A - Twin axle unit - Google Patents

Twin axle unit Download PDF

Info

Publication number
GB2128941A
GB2128941A GB08325297A GB8325297A GB2128941A GB 2128941 A GB2128941 A GB 2128941A GB 08325297 A GB08325297 A GB 08325297A GB 8325297 A GB8325297 A GB 8325297A GB 2128941 A GB2128941 A GB 2128941A
Authority
GB
United Kingdom
Prior art keywords
axle
wheel axles
leaf springs
twin
axle unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08325297A
Other versions
GB2128941B (en
GB8325297D0 (en
Inventor
Helmut Steiner
Karl Rainer Lang
Manfred Adolfs
Dietrich Herzog
Eberhard Spangenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bergische Achsen Kotz Soehne
Original Assignee
Bergische Achsen Kotz Soehne
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bergische Achsen Kotz Soehne filed Critical Bergische Achsen Kotz Soehne
Publication of GB8325297D0 publication Critical patent/GB8325297D0/en
Publication of GB2128941A publication Critical patent/GB2128941A/en
Application granted granted Critical
Publication of GB2128941B publication Critical patent/GB2128941B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/10—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
    • B60G11/113—Mountings on the axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/10—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
    • B60G11/107—Sliding or rolling mountings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/32—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds
    • B60G11/34—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs
    • B60G11/44—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs and also torsion-bar springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G5/00—Resilient suspensions for a set of tandem wheels or axles having interrelated movements
    • B60G5/04—Resilient suspensions for a set of tandem wheels or axles having interrelated movements with two or more pivoted arms, the movements of which are resiliently interrelated, e.g. the arms being rigid
    • B60G5/053—Resilient suspensions for a set of tandem wheels or axles having interrelated movements with two or more pivoted arms, the movements of which are resiliently interrelated, e.g. the arms being rigid a leafspring being used as equilibration unit between two axle-supporting units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/30—Rigid axle suspensions
    • B60G2200/318—Rigid axle suspensions two or more axles being mounted on a longitudinal rocking or walking beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/11—Leaf spring
    • B60G2202/112—Leaf spring longitudinally arranged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/121—Mounting of leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/423—Rails, tubes, or the like, for guiding the movement of suspension elements
    • B60G2204/4232—Sliding mounts

Abstract

In a twin axle unit for trailers or semi-trailers with, leaf springs (4) which are pivotally mounted on a supporting axle (7), their ends being connected to the two wheel axles (1, 2), the supporting axle (7) being fixed on a respective pedestal (8), the two wheel axles (1, 2) are connected to the leaf springs (4) and longitudinal links (10, 11) are disposed between the wheel axles (1, 2) and the supporting axle (7) or consoles (22) which are rigid with the chassis so that they extend approximately parallel with the leaf springs (4). <IMAGE>

Description

SPECIFICATION Twin axle unit The object of the invention is a twin axle unit for trailers or semi-trailers and having on both sides of the vehicle leaf springs which are floatingly mounted on a supporting axle, their ends being connected to the two wheel axles, the supporting axle being mounted at both ends on respective pedestals.
A twin axle unit of the aforedescribed type is known for example from German Patent Specification No. 25 56 531. Where this known twin axle unit is concerned, the two leaf springs have their centre disposed on the supporting axle through a respective rubber bush which is forced in slip-proof manner between a housing and a steel bush, the ends of the leaf springs being bolted in angularly stable fashion to the associated wheel axle by means of spring tension housings and spring brackets. These known twin axle units already offer static and dynamic axle load equalisation and have also proved successful in operation.
The braking moment of the four wheel axles must however, in the case of this known twin axle unit, also be absorbed as bending moments by the leaf springs which must therefore be of correspondingly rugged dimensions.
On this premise, the invention is based on the problem of so improving the known twin axle unit that dynamic variations in axle loading due to braking moment are eliminated.
As a technical solution to this problem, it is suggested that the two wheel axles be articulatingly connected to the leaf springs and that, between the wheel axles and the supporting axle or consoles which are rigid with the chassis, there should be disposed longitudinal links which extend approximately parallel with the leaf springs.
In the case of a practical embodiment, the articulating connection between the wheel axles and their leaf springs can be brought about in that spring tension housings having a convexly curved upper bearing plate and a concavely curved lower bearing plate are provided, which form a plain bearing for the wheel axles and a thrust bearing for thrust rollers connected to the wheel axles. Since the plain bearings extend over the entire width of the spring tension housings and are held together with the thrust rollers, the quadrangle formed by the twd leaf springs and the two wheel axles is still angularly stable in spite of a slight rotational mobility of the wheel axles in relation to the leaf springs.
The longitudinal links which extend approximately parallel with the leaf springs can be articulatingly disposed either below or above the leaf springs between the wheel axles and the supporting axle or pedestals. It has been found to be expedient so to design the longitudinal link arrangement that it is possible optionally to clamp a torsion bar stabiliser between the supporting axle end and/or pedestal end of the longitudinal link.
In the case of another practical embodiment, the articulating connection between the wheel axles and their leaf springs can be brought about by providing convex bearing plates which form the plain bearings for the wheel axles and in that spring plates are provided which are connected to the tensioning rollers and engage around the ends of the leaf springs. Furthermore, where this practical embodiment is concerned, the two wheel axles and the longitudinal links are connected rigidly to one another by means of tension housings, but those ends of the longitudinal links which face forwards in the direction of travel are articulated on the supporting axle or on the consoles which are rigid with the chassis.
A twin axle unit constructed in accordance with the invention combines the advantages of the state of the art as known from German Patent Specification No. 25 56 531 with the fact that the leaf springs are relieved of the braking moments. In the laden condition, the pivot points of the plain bearings on the wheel axles and the supporting axle on each side of the vehicle should as far as possible be in one line. In the laden condition, the longitudinal links should as far as possible lie parallel with this line so that a parallel articulation is created. The braking moments are however also compensated for if the longitudinal links extend at an acute angle to the said line.In the case of the twin axle unit according to the invention, the braking moment of each wheel is converted into equal-magnitude traction and compression forces which are mutually eliminating and stress the leaf springs or longitudinal links only in a longitudinal direction, but particularly in the case of the leaf springs, no longer stress these in a flexion sense. Consequently, such a twin axle unit offers complete static and dynamic axle load and braking load equalisation.
The rotary connection between axle and spring can however also be so devised that instead of the thrust roller and the plain bearing, only one rotary bearing is provided or in that the mounting passes around a round axle. Further details and advantages of the object of the invention will become evident from the ensuing description of the associated drawings in which two twin axle units constructed according to the invention are diagrammatically illustrated. In the drawings: Figure 1 is a side view of a twin axle unit having longitudinal links articulated on the supporting axle, the drawing being a section taken on the line I-I in Fig. 2; Figure 2 is a plan view of the same twin axle unit; Figure 3 is a side view of the twin axle unit with wheel axles, in section along the line Ill-Ill in Fig. 4; Figure 4 is a plan view of the same twin axle unit.
The twin axle unit illustrated has two wheel axles 1 and 2 which, with interposed spring tension housings 3, are articulatingly fixed at the ends of two leaf springs 4 which extend parallel with each other. The centres of the leaf springs 4 are fixed in housings 5 of support bearings 6 which are in turn disposed on a supporting axle 7 which is fixed to a vehicle chassis 9 by pedestals 8. Located between the wheel axles 1, 2 and the supporting axle 7 are longitudinal links 10 and 11 which extend approximately parallel with the two branches of the leaf springs 4.
In the case of the embodiment shown in Figs. 1 and 2, each spring tension housing 3 has a convexly curved upper bearing plate 1 2 and a concavely curved lower bearing plate 13, which form plain bearings 14 with the wheel axles 1, 2. The plain bearings 14 are held together by tensioning rollers 1 5 which are mounted on both sides of the leaf springs 4 in consoles connected to the wheel axles 1, 2. It is true that the wheel axles 1, 2 are able to pivot slightly about the plain bearings 14 but, when viewed in plan, they do form an angularly stable quadrangle with the two leaf springs 4.
The two longitudinal links 10 and 11 are in each case articulated between a console 1 6 connected to the wheel axles 1, 2 and a console 1 7 connected to the pedestal 8. Between the longitudinal links 10 which are at the front in the direction of travel there is clamped a torsion bar stabiliser 1 8. Naturally, a torsion bar stabiliser may also be disposed between the longitudinal links 11 which are at the rear in the direction of travel, just as it is possible to have no torsion bar stabiliser at the front longitudinal links 11, in relation to the direction of travel.
In the case of the embodiment shown in Figs. 3 and 4, the wheel axles 1, 2 and the two longitudinal links 10, 11 are connected rigidly to one another by means of tension housings 19. The plain bearings 14 consist of bearing plates 20 fixed on the wheel axles 1, 2 with the tension housings 1 9 and lateral spring plates 21 between the free ends of which the tensioning rollers 1 5 are disposed.
The two longitudinal links 10 which are at the front in the direction of travel are articulated on front consoles 22 which are rigid with the chassis so that both wheel axles 1, 2 are pulled by their longitudinal links 10, 11.

Claims (8)

1. Twin axle for trailers or semi-trailers and having on both side of the vehicle leaf springs (4) which are floatingly mounted on a supporting axle (7), their ends being connected to the two wheel axles, the supporting axle (7) being mounted at both ends on respective pedestals (8) connected to a vehicle chassis (9), characterised in that the two wheel axles (1, 2) are articulatingly connected to the leaf springs (4) and in that between the wheel axles (1, 2) and the supporting axle (7) or consoles (22) rigid with the chassis there are longitudinal links (10, 11) which extend approximately parallel with the leaf springs.
2. Twin axle unit according to Claim 1, characterised in that spring tension housings (3) are provided which have a convexly curved upper bearing plate (12) and a concavely curved lower bearing plate (13) and which form plain bearings (14) for the wheel axles and thrust bearings for tension rollers (15) connected to the wheel axles (1, 2).
3. Twin axle unit according to Claims 1 and 2, characterised in that the longitudinal links (10, 11) are articulatingly disposed below or above the leaf springs (4) between the wheel axles (1, 2) and the supporting axle (7) or pedestals (8).
4. Twin axle unit according to Claims 1 to 3, characterised in that a torsion bar stabiliser (18) is clamped between the support axle end and pedestal end of each of the longitudinal links.
5. Twin axle unit according to Claim 1, characterised in that convex bearing plates (20) are provided which form the plain bearings (14) for the wheel axles and in that, connected to tensioning rollers, there are spring plates (21) which engage around the ends of the leaf springs (4).
6. Twin axle unit according to Claims 1 and 5, characterised in that the two wheel axles (1, 2) and the longitudinal links (10, 11) are connected rigidly to each other by means of tension housings (19).
7. Twin axle unit comprising a main axle, two parallel longitudinally spaced wheel axles connected to the main axle by means of leaf springs at each side thereof, and a link which extends from each wheel axle to either the supporting axle or a member rigid with a chassis of a vehicle to which the unit is connected, in a direction substantially parallel to that of the leaf spring.
8. A twin axle unit substantially as herein described with reference to Figs. 1 and 2 or Fig. 3 and 4 of the accompanying drawings.
GB08325297A 1982-10-26 1983-09-21 Twin axle unit Expired GB2128941B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3239539 1982-10-26
DE19833313252 DE3313252A1 (en) 1982-10-26 1983-04-13 DOUBLE AXLE UNIT

Publications (3)

Publication Number Publication Date
GB8325297D0 GB8325297D0 (en) 1983-10-26
GB2128941A true GB2128941A (en) 1984-05-10
GB2128941B GB2128941B (en) 1986-08-13

Family

ID=25805347

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08325297A Expired GB2128941B (en) 1982-10-26 1983-09-21 Twin axle unit

Country Status (4)

Country Link
DE (1) DE3313252A1 (en)
GB (1) GB2128941B (en)
IT (1) IT1169886B (en)
YU (1) YU212083A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4429583A1 (en) * 1994-08-19 1996-02-22 Man Nutzfahrzeuge Ag Double-axle unit of a commercial vehicle with a special leaf spring gear bearing
DE10052790A1 (en) * 2000-10-25 2002-05-16 Bernd Mudersbach Chassis for vehicle trailer has four wheel mountings with each two connected together through force transmission means to transfer forces acting on mounting

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB390967A (en) * 1932-01-28 1933-04-20 Gino Turrinelli Improvements in two axle bogies for vehicles
GB924697A (en) * 1960-08-08 1963-05-01 Eaton Mfg Co Axle suspension mechanism
GB946394A (en) * 1962-02-02 1964-01-15 Fodens Ltd Improvements relating to vehicle bogie axle attachments
GB1003407A (en) * 1963-09-12 1965-09-02 Jonas Woodhead And Sons Ltd Improvements in or relating to vehicle suspension systems
GB1023228A (en) * 1963-12-24 1966-03-23 County Commercial Cars Ltd Improvements in or relating to spring suspension systems for vehicle wheels
GB1307268A (en) * 1970-08-05 1973-02-14 British Leyland Truck & Bus Bogie suspensions
GB2040241A (en) * 1979-01-22 1980-08-28 Rockwell International Corp Tandem axle suspension bracket assembly
GB2046191A (en) * 1979-03-26 1980-11-12 Acmat Chassis-cab automobile vehicle with a double rear axle

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2002852A (en) * 1934-04-21 1935-05-28 Perfection Steel Body Company Third axle unit for trucks
DE1047033B (en) * 1954-11-12 1958-12-18 Daimler Benz Ag Suspension of double rigid rear axles
DK105852A (en) * 1961-05-11
GB1467443A (en) * 1974-05-14 1977-03-16 Watson N Suspension bogies for road vehicles
DE2556531C3 (en) * 1975-12-16 1979-08-30 Bergische Achsenfabrik Fr. Kotz & Soehne, 5276 Wiehl Double axle unit for trailers or semitrailers
DE2741250C2 (en) * 1977-09-14 1983-01-27 Bergische Achsenfabrik Fr. Kotz & Söhne, 5276 Wiehl Compound axle assembly for trailers

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB390967A (en) * 1932-01-28 1933-04-20 Gino Turrinelli Improvements in two axle bogies for vehicles
GB924697A (en) * 1960-08-08 1963-05-01 Eaton Mfg Co Axle suspension mechanism
GB946394A (en) * 1962-02-02 1964-01-15 Fodens Ltd Improvements relating to vehicle bogie axle attachments
GB1003407A (en) * 1963-09-12 1965-09-02 Jonas Woodhead And Sons Ltd Improvements in or relating to vehicle suspension systems
GB1023228A (en) * 1963-12-24 1966-03-23 County Commercial Cars Ltd Improvements in or relating to spring suspension systems for vehicle wheels
GB1307268A (en) * 1970-08-05 1973-02-14 British Leyland Truck & Bus Bogie suspensions
GB2040241A (en) * 1979-01-22 1980-08-28 Rockwell International Corp Tandem axle suspension bracket assembly
GB2046191A (en) * 1979-03-26 1980-11-12 Acmat Chassis-cab automobile vehicle with a double rear axle

Also Published As

Publication number Publication date
YU212083A (en) 1986-08-31
DE3313252C2 (en) 1987-01-22
GB2128941B (en) 1986-08-13
GB8325297D0 (en) 1983-10-26
IT1169886B (en) 1987-06-03
IT8323420A0 (en) 1983-10-25
DE3313252A1 (en) 1984-04-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee