DD297121A5 - DRIVEN CHASSIS WITH STEERING SINGLE DRIVE - Google Patents

Abstract

The invention relates to a driven chassis with two interconnected and mutually steerable individual drives for low-floor rail vehicles with at least two hinged interconnected box parts. The aim of the invention is a low over the entire vehicle length infinitely extending vehicle floor, a stable straight-ahead and low-wear cornering of the driven chassis when using lightweight construction and reducing investment costs. The invention has for its object to provide an aforementioned driven chassis with low unsprung mass fraction, which allows a reduction in the number of vehicles and drives. According to the invention, this is achieved in particular by the fact that two individual drives (2, 2, 52, 52) equipped with steering means (15, 15, 16, 66, 77, 79, 79) can be pivoted about their horizontal axis below the center of the wheels (8, 8, 58, 58) are connected to one another by a connecting member (3) which has at its ends transversely directed support arms (4, 4) for the support of a box part, to which at least one motor (21) and a brake (23, 24) are fastened, for example, via extendable propeller shafts (25, 25) and the Radauszenseitig on two individual drives (2, 2, 52, 52) arranged bevel gear (26, 26) drive and brake the chassis (1, 51, 51). The entire embodiment of the invention is set forth in a total of 16 claims and associated 9 figures. Fig. 1 {low-floor rail vehicle; Articulated vehicle; Single drives; Box parts; Vehicle floor; Steering means; Link; support; Engine; Brake; Propeller shafts; Bevel}

Description

For this 9 pages drawings

The invention relates to a driven chassis with two interconnected and mutually steerable Single drives for low-floor rail vehicles, in particular for articulated vehicles, consisting of at least two, articulated

consist of interconnected box parts, in which a steering linkage for curvature radial adjustment of

Single drives transfers the bending angle of the box parts to the chassis. Comfortable entry conditions and a resulting lower vehicle floor, the stepless over the whole Vehicle length should be some of the essential demands that passengers on the comfort of today

rail-bound vehicles, especially urban traffic.

In addition, from the perspective of the operator em stable straight-ahead and a low-wear cornering is required, the latter

closely associated with the elimination of annoying perceived curve squeaking.

Other goals are lightweight construction and the reduction of investment costs, for example by reducing the number of axles

same capacity of the vehicles.

Already very early one has tried according to the prior art, in such lightweight articulated vehicles on bogies

to renounce, which require heavy bogie frame by their central load.

Known older versions use this either the so-called club steering axle or see a achsfreies Box part, which connects the two axle-supported box parts articulated together. In most cases, these solutions occur as a result of the existing clearance in the axle bearings and the steering,

and the partially missing damping, a lurching own motion in the form of a sinusoidal rotary motion around the

Vertical axis, which causes a restless running of the vehicles. Recently, with the European application EP (A 2) 0263793 a landing gear has become known which as a motorized

biaxial bogie designed by its low, axle-cranked design of use below a central bogie

Box part or the joint of low-floor rail vehicles with two or more articulated box parts

accommodates.

For this purpose, two idler gears are each connected to an axle bridge arranged below its axle center, which

otherwise formed substantially L-shaped and each at the end of its long beam-like leg drehsymmetrischmit a same, the second Losradpaar carrying axle in the vertical direction hinged to a non-sprung

Bogie frame is imposed. The axle bridges serve in their midst each receiving a central air spring, both

have at their top a multi-part swivel. In this support, swinging about the vertical axis, both the

two outwardly directed end-box parts, as well as a two air springs connecting and a middle box part serving underframe support frame from which is hinged in the longitudinal direction of the handlebars to the axle bridges. The Antriebsaubrüstung consists of one between two Losradpaaren longitudinal and on unsupported bogie frame elastically mounted engine with beidseltigem output to the idler gears, the power transmission by means of cardan shafts on bevel gear with Stirnradvorgelege, which are arranged on the outside of the stub axles. The brake equipment, consisting of pad and magnetic rail brakes, is also suspended from the unsupported bogie frame.

The disadvantages are essentially that the solution shown is based on the design of a bogie in which neither a curve-dependent control is provided by at least one of the box parts, nor a radial adjustability of the wheels when cornering is possible. In addition, the bogie frame disclosed there including all major attachments, such as engines and brakes, to count for unsprung bogie mass.

Further, with the international application WO - 85/05602 a solution is known in which two Losrad Eimellaufworke with their integrated, rigid short coupling parts are releasably connected to each other and thus form a four-wheeled, unmotorisiertes drive, which by its low, axial cranked design of Use below or adjacent to a hinge part of low-floor rail vehicles with at least two box parts, accommodates. For this purpose, two idler gears are each connected to an axle bridge arranged below the axle, which otherwise has a rigid coupling part and with this longitudinally displaceable the rigid coupling part of a mirror-symmetrical counterparts, the second Losradpaar carrying axle bridge comprises. The axle bridges serve in their middle for receiving a central air spring which are rotatably mounted on its underside on a ball slewing ring and carry on their upper side the respective end cost parts via support arms by means of an annular support having a combined axial / radial bearing, in that engages the pivot of the joint floor part. The annular supports of the two end-box parts are connected to each other via a rod coupling, which are arranged in the longitudinal direction on the handlebars on the two rigidly arranged on the axle jacks, telescopically telescoping coupling parts. Furthermore, the end box parts are connected via roll stops to the axle bridges.

The brake equipment consists of external disc brakes, the brake discs are arranged on the stub axles, the brake operating parts are suspended from a support of the axle bridge without suspension. The disadvantages are essentially that in the solution shown neither a curve-dependent control is provided by at least one of the box parts, nor a radial adjustability of the wheels when cornering is possible and also counts the brake system shown to unsprung mass.

Another disadvantage is that the floor level is raised in the region of the (motorized) Enddrehgestelle arranged transversely to the direction of stairs.

Due to the disadvantages of the solutions shown in the prior art not only the wheel / rail wear are adversely affected, and the curve squeaking not resolved, but also all accelerations are directed by the wheel / rail contact her directly and unsprung in load-bearing components and their attachments , which is known to lead to undesirable high stresses. Cracks or even the breakage of load-bearing components are the result. By loosening screw connections often functionally important single line are lost on the ride. This jeopardizes the safety and / or the functionality in such a way that it eventually comes to forcible failure of the vehicle. Here, the present invention will remedy the situation.

It therefore aims to provide a simple and lightweight driven chassis with low unsprung mass fraction for low-floor rail vehicles, especially for articulated vehicles, where at least two axle-mounted box parts are hinged together and the Knickw'.ikel the box parts for kurvenradialan setting the wheel pairs on the chassis uses becomes.

According to the invention, such a driven chassis is characterized in that two mutually steerable individual drives of a low, axial cranked type are interconnected and carry the respective box part of a, consisting of at least two box parts, low-floor articulated vehicle and accelerate the articulated vehicle or suspended on this box part engines and reduction gearbox Delay over there suspended brakes, with a steering linkage with a corresponding translation to the curve radial adjustment of the individual drives transmits the bending angle of the box parts on the chassis.

As a result, during cornering, the leading between a leading in the direction of travel box part under which a suspension according to the invention and a subsequent, for example, also axially supported box part adjusting bending angle is transmitted to the steerable individual drives, so that there is the desired curve radial adjustment of the wheel pairs. Likewise, the tap of the bend angle resulting during cornering can also take place between two axle-supported box parts connected to one another in an articulated manner by an axle-free box part, under which in each case an inventive chassis is located.

Compared with similar articulated vehicles, which are equipped with known bogies, this results in a reduction in the number of vehicles and drives, which is associated with a significant weight reduction and as a result, a cost reduction for purchase and maintenance. This tendency is reinforced by the simple and lightweight design of the chassis according to the invention. Both the radially adjustable individual drives and the drive and brake equipment suspended from the axle-supported box section contribute to this.

Further embodiments of the chassis according to the invention also allow a two-stage cushioning of the steerable individual drives, whereby the unsprung masses are reduced to a minimum.

Advantages of the solution according to the invention are also:

- The rigid connection of the two steerable individual drives is torsionally soft and thus meets all conditions and derailment safety with regard to uneven wheel pressures or wheel load changes due to cornering at

Twisted tracks.

- Due to the special, at the same time serving the box support design of the connection of both individual drives the Ausdrehbewegung is kept away from the box suspension when cornering and so reduces the Ausdrehwiderstand to a minimum.

- The support of the box part is done on a broad basis, so that can be dispensed with additional roll stabilizers.

- Reaction forces from the drive and brake, and wheel diameter differences are absorbed by the system and leave, for example, the curvature radial adjustability unaffected.

- For the mutual curve radial control of the two interconnected individual drives either the most diverse, known steering linkage can be applied.

The invention will be explained by way of example with reference to the following figures. Show it Fig. 1: a double-driven chassis with single-wheel drives single in plan view 2 shows a side view of the chassis according to FIG. 1 3: a front view of the chassis according to FIG. 1 Fig. 4: a unilaterally driven chassis with single-axis single drives in plan view 5 shows a side view of the chassis according to FIG. 4 6: a front view of the chassis according to FIG. 4 Fig. 7: a driven chassis according to section line VII-VII of Figure 3, but with two-stage cushioning 8 shows a further embodiment of a two-stage suspension for a driven chassis according to the section line

VIII-VIII of Figure 6 Fig. 9: a unidirectional driven chassis with single-wheeled individual drives according to Figure 4 and a variant of

Curve control in plan view. A shown in Figures 1 to 3 driven chassis 1 consists of two mutually steerable, in the public

identically constructed single-wheeled individual drives 2,2 ', which by their their Achsdistanz specifying, as well as the drive and

Brake forces receiving rigid and torsionally soft connecting member 3 not separable connected In the present embodiment, each individual drive is 2,2 'at all its outer vertices with four, below the Achsmitte lying support arms 4,4 'provided for receiving a common low-floor box part. The support of the box part is carried out, single - stage suspension, Radaußenseitig on a very large base on the at the ends of Connecting member 3 H-shaped support arms 4,4 '. A total of eight, on the transverse support arms 4,4 '

arranged spring means 5,5 ', allow vertical deflection and horizontal transverse suspension of the box part and are attenuated, for example, per pair of springs by a vertical damper 6,6'.

For the boring movement as a result of cornering, each individual drive 2,2 'preferably has a known one Ball slewing ring 7, T on, which on a downwardly cranked, the two internally mounted single wheels 8,8 '

interconnecting wheel bridge 9.9 'rests large area and so a horizontal tilting of the wheel bridge 9.9' in

Single drive 2.2 'impossible. By the described arrangement of a ball slewing ring 7, T and in particular by the special design of the Connecting member 3 for the simultaneous box support is the Ausdrehbewegung when cornering of the Spring means 5,5 'kept away. As a result, they are stressed only vertically and horizontally-across and remain at Cornering in a respect to their support height and vertical position unchanged position. A sinking of the box part at

tight curves, as it is known from flexi-stressed springs, is thereby avoided.

As a result, the Ausdrehwiderstand the individual drives 2,2 'are reduced to a minimum and their lighter curve radials Setting possible. For curvature radial adjustment of the single drives 2,2 'is first the bending angle between two adjacent and articulated

interconnected box parts on a arranged in the direction of travel handlebar 11 on a front rope on

Single drive 2 transmitted in the longitudinal center planes 10 with a rotary bearing 17 mounted angle lever 12 and thus querzur Direction of travel deflected to a handlebar 13, which engages on one side of the wheel bridge 9 located extension 14. For the

mutual steering of the individual drives 2,2 ', each wheel bridge 9,9' has a lying outside the longitudinal center planes 10 Toggle-like extension 15,15 ', which rotationally symmetrically facing each other with a handlebar 16 in the

Hinge points 18 are connected to each other. The longitudinal entrainment between the box part and the chassis is preferably done via two on the single drive 2 in Hinged 18 mounted, for example, on both sides of the longitudinal center planes 10 parallel trailing arms 19th The motorization shown, the two interconnected in the manner described above individual drives 2,

2'zu a powered chassis 1.

For this purpose, for example, on each chassis longitudinal side, a drive motor 21,21 'including reduction gears 22,22', and on

the output side located brake discs 23,23 'together with the associated brake actuations 24,24' on the sprung

Hung box part. The power transmission takes place from there on both sides by means of extractable propeller shafts 25,25 ', on each of the radaußenseitig

the stub axle of the individual wheels 8,8 ', arranged bevel gear 26,26'.

In FIGS. 4 to 6, as a further preferred embodiment, a particularly light chassis 51 according to the invention is provided

illustrated, which consists of two mutually steerable, substantially identical single-axis single drives 52,52 ', which is non-separably connected to each other by a, defining their axial distance, as well as the drive and braking forces receiving rigid and twisting soft connecting member 3.

In the present embodiment, each individual drive 52,52 'at its outer vertices with two, below the Achsmitte lying support arms 4,4 'provided for receiving 6ines common low-floor box part.

The support of the box part is carried out, single-step suspension, radaußenseltlg on a very large base on the at the ends of the connecting member 3 T-förmlg formed support arms 4,4 '. A total of four, on the transverse support arms 4,4 'arranged spring means 5,5' allow vertical deflection and horizontal transverse suspension of the box part and are attenuated, for example, per spring by a vertical damper 6,6 ', not shown.

For the boring movement as a result of cornering, each individual drive 52, 52 'preferably has a known ball slewing ring 7, T , which is guided on both sides parallel to an axis 56, 56', containing the inner bearing 70, 70 'of the wheel set 58, 58' Axle frame 59.59 'large surface rests and so a horizontal tilting of the axle frame 59,59' in the single drive 52.52 'impossible.

The described arrangement of a ball slewing ring 7, T and in particular by the special design of the connecting member 3 for the simultaneous box support the Ausdrehbewegung is kept away from the spring means 5,5 'when cornering.

As a result, they are stressed only vertically and horizontally-transverse and remain when cornering in a respect to their support height and vertical position unchanged position. A sinking of the box part in tight curves, as it is known from flexibungsanspruchten springs, is thereby avoided.

As a result, the Ausdrehwiderstand the Einzellaufwerko 2,2 'are reduced to a minimum and their lighter curve radial adjustment allows.

The Längsmitnahme and the curvature radial adjustment of the individual drives 52,52 'takes place in the same manner as already described in Figures 1 to 3. For the mutual steering of the individual drives 52,52 'is on each axle frame 59,59' against each other diagonally offset a hinge point 18 is provided, which are both connected by at least one, below the connecting member 3 obliquely guided connecting rod 77.

The motorization shown, the two interconnected in the manner described individual drives 52,52 'to a powered chassis 51st

For this purpose, a drive motor 21 including reduction gears 22, as well as a brake disk 23 located on the one output side of which, together with its associated brake actuator 24, are suspended on the sprung box part, for example, on a chassis longitudinal target.

The power transmission takes place from there on both sides by means of pull-out cardan shafts 25 on the one side radaußenseitig on the wheelsets 58,58 'arranged bevel gear 26,26'.

Due to the arrangement according to the invention, the reaction forces originating from the drive and the brake, as well as any wheel diameter differences, are absorbed by the system in both embodiments described above, without this affecting, for example, the curve radial adjustability.

At the same time, the torsionally soft connection of the two individual drives meets all the conditions for the derailment of the uneven wheel pressures, and Radlaständerunt, Jn due to cornering at track distortions.

Figure 7 shows a previously described driven chassis 1, but with a two-stage cushioning of the box part. Here, the pure vertical suspension serving, additional spring means 55,55 'between the wheel bridges 9,9' and a respective Kugoldrehkranz 7, T are arranged.

Another possibility for a two-stage cushioning of the box part is shown in FIG. Here, the axle frame 59, 59 'on both sides next to the inner bearing 70,70' arranged, known per se spring means 78,78 'supported. Alternatively, in a two-stage cushioning on both sides of the wheel bridge 9,9 'or the axle frame 59,59', and arranged for the lowest possible construction, compared to these arranged in height known per se ball slewing rings segments be provided, which the spring means 55,55 ' take up.

FIG. 9 shows, using the example of a previously described driven chassis 51, a variant 51 'with another mutual steering of the individual drives 52, 52'. Here, a pivot lever 66 is rotatably mounted in a bearing 17 on the connecting member 3 at half the axis distance and connected in its pivot points 18 via steering rods 79,79 'with the corresponding hinge points 18 of the two axle frame 59,59' in the form shown. The embodiments of a powered undercarriage 1,51,51 'shown in Figures 1 to 9 may also include the optional combination of the features shown (eg, drive, suspension, steering) and all refer to a general inventive concept according to the wording of one of Claims.

Claims (16)

1. Powered chassis for low-floor rail vehicles with at least two articulated box parts, preferably according to at least one of the claims, characterized in that two with steering means (15,15 ', 16,77,66,79,79') equipped individual drives (2,2 ', 52,52') pivotable about their Horizonalachse below the axle center of the wheels (8,8 ', 58,58') by a connecting member (3) are interconnected, which transverse ends at Heeh ends supporting arms (4, 4 ') for the support of a box part, to which at least one motor (21) and a brake (23, 24') are fastened, for example via extendable cardan shafts (25, 25 ') and the outside of the wheel on both individual drives (2, 2 ', 52, 52') arranged bevel gear (26,26 ') drive the Fahiwerk (1,51,51') and brake. 2. Driven chassis, preferably according to at least one of claims, characterized in that a connecting member (3) with respect to its longitudinal central planes (10) in itself rigid and with respect to its transverse support arms (4,4 ') is made torsionally soft. 3. Driven chassis, preferably according to at least one of claims, characterized in that the transverse support arms (4,4 ') below the center of the wheels (8, 8', 58,58 ') and these either H-shaped on both sides or Embrace a T-shape on one side and wheel outside on a large base of the support of a box part serving spring means (5, 5 '). 4. Powered chassis, preferably according to at least one of claims, characterized in that a connecting member (3) has at least one pivot bearing (17) in which a steering linkage (11,12,13) is mounted, which articulated the angle of two interconnected Casing parts on a single drive (2.2 ', 52.52') transmits, which has for this purpose, for example, a tiller-like extension (14). 5. Driven chassis, preferably according to at least one of claims, characterized in that a connecting member (3) over a large area via a ball slewing ring (7,7 ') in the horizontal plane pivotally mounted on the wheel bridge (9,9') or the axle frame (59 , 59 ') of a single wheel drive (2,2', 52,52 ') supported and thereby remain the support height and vertical position of the spring means (5,5') during unscrewing innacho cornering and the Ausdrehwiderstand is reduced to a minimum. 6. Driven chassis, preferably according to at least one of claims, characterized in that the spring means (5,5 ') serve exclusively the vertical box suspension and allow horizontal transverse movements of the box part, and a good curvature radial adjustment of the individual drives (2,2', 52 , 52 ') with the steering means (15,15', 16,77,79,79 ') via a ball slewing ring (7,7') is possible. 7. Driven chassis, preferably gekonnzeichnet according to at least one of the claims, characterized in that the spring means (5,5 ') either by a single spring or in parallel arrangement thereof by a vertical damper (6,6') are attenuated. 8. Driven chassis, preferably according to at least one of the claims, characterized in that a single drive either a downwardly cranked, the two internally mounted single wheels (8,8 ') interconnected wheel bridge (9,9') or one on both sides parallel to a Axis (56,56 ') guided, the inner bearing (70,70') of a wheelset (58,58 ') containing the axle frame (59,59'). 9. Driven chassis, preferably according to at least one of claims, characterized in that the wheel bridges (9,9 ') of both individual drives (2,2') and the axle frame (59, 59 ') of both individual drives (52,52') with each other for the purpose of mutual control by double-sided (15,15 ', 16), unilaterally (79,79', 66) or diagonally (77) arranged steering means are connected. 10. Driven chassis, preferably according to at least one dei claims, characterized in that two by a connecting member (3) interconnected individual drives (2,2 ', 52,52') at least one drive motor (21,21 '), the a chassis longitudinal side together with the reduction gears (22,22 ') and one located on the output side brake disc (23) with associated brake actuator (23), spring-loaded (5,5'), suspended from the box part. 11. Driven running gear, preferably according to at least one of claims, characterized in that the power transmission from the drive by means of extractable propeller shafts (25, 25 ') on the radaußenseitig on the individual wheels (8,8') or the wheelsets (58,58 ') arranged bevel gear (26,26 ') takes place. 12. Driven chassis, preferably according to at least one of claims;, characterized in that the reaction forces of drive (21,22,25) and brake (23,24), as well as differences in the diameters of the wheels (8,8 ', 58 , 58 ') the Lenkmittol (15,15', 16,77,66,79, 79 ') for curvature radial adjustment of the individual drives (2,2', 52,52 ') unaffected. 13. Powered chassis, preferably according to at least one of claims, characterized in that for the longitudinal drive between the box part and the chassis two, on a single drive (2,2 ', 52,52') in articulation points (18) mounted trailing arm (19) are. 14. Driven running gear, preferably according to at least one of claims, characterized in that for reducing the unsprung masses a two-stage cushioning of the box part with between the wheel bridge (9,9 ') and the ball slewing ring (7,7') arranged spring means (55, 55 ') or in addition to the inner bearing (70,70') of the axle frame (59,59 ') located spring means (78,78') are provided. 15. Driven chassis, preferably according to at least one of claims, characterized in that arranged for a two-stage cushioning of the box part on both sides of the wheel bridge (9,9 ') or the axle frame (59,59') and in relation to these in height nested, slewing ring -Segmente are provided which receive the spring means (55,55 '). 16. Powered chassis for low-floor rail vehicles with at least two articulated box parts, preferably according to at least one of claims, characterized in that two with steering means (15,15 ', 16,77,66,79,79') equipped individual drives (2,2 ', 52,52') by a connecting member (3) are interconnected, having at its ends transversely directed support arms (4,4 ') for the support of a box part, wherein preferably at least one motor (21) and a Brake (23,24 ') are provided, which, for example via extendable cardan shafts (25,25') and the radaußenseitig on two individual drives (2,2 ', 52,52') arranged bevel gear (26,26 '), the chassis (1,51,51 ') drive and brake.