Patent Application
20170282939
The invention relates to a chassis frame for a rail vehicle, comprising at least one drive unit, such as a motor, fastened to the chassis frame via at least one elongated fastener applicable to bogie (wheel truck) frames, i.e., inside-frame bogies, where the axle bearings and frame sections are between the wheels/wheel disks, but also in principle to outside-frame bogies and wherein the at least one fastener is generally detachable so that the drive unit can be replaced.
Because of the limited space available, the positioning of the interface between the drive, on the one hand, and the chassis/bogie on the other represents a major challenge. In the case of rail vehicles, it may therefore be advisable to position the drive adjacent to the chassis in the longitudinal direction. The drive is fastened to the chassis and transmits various forces (e.g., dead weight, or torque) to the chassis frame.
Thus, for example, the drive can be bolted/screwed to the chassis via a motor bearer fixed to the chassis. This motor bearer is located above the drive and is a solid, heavy component that must be appropriately fastened to the chassis frame. The bolting/screwing to the drive through the motor mounts thereof occurs vertically, i.e., the bolts or screws run vertically in the operating state of the chassis.
Another possibility for fastening the drive motor is to dispose elongated detachable fastening elements on the chassis in the direction of travel, which is easily achievable in the case of a long wheelbase, but is often difficult in the case of a short wheelbase because of the space required for mounting and dismounting the drive motor (space for tightening tool, space for fastening the screws/bolts).
It is therefore an object of the present invention to provide a chassis frame with a drive unit, where the chassis frame is lighter than a chassis frame with a motor bearer, and which enables the drive unit to be mounted/dismounted even in the case of a short wheelbase.
This and other objects and advantages are achieved in accordance with the invention by a chassis frame comprising a drive unit fastened to the chassis frame via at least one elongated fastener.
In accordance with the invention, the at least one fastener is disposed transversely with respect to the direction of travel and projects into the chassis frame or is guided through mounting brackets fixedly connected to the chassis frame, and projects into the space above or below the chassis frame.
“Transversely with respect to the direction of travel” means that the at least one elongated fastener is disposed transversely with respect to the longitudinal extent of the chassis frame, i.e., at right angles to the longitudinal direction of the longitudinal members of the chassis frame, for example. The at least one elongated fastener will generally lie normal to the direction of travel in a horizontal plane in the operating state of the chassis frame.
In general, all the fasteners of a drive unit will inventively project into the chassis frame or into the space above or below the chassis frame.
By enabling fasteners to be fastened directly to the chassis frame or above or below the chassis frame to a mounting bracket rigidly connected thereto by disposing them transversely with respect to the direction of travel, a motor bearer can be dispensed with, thereby providing a weight saving and simplifying the design of the chassis frame.
Connecting the drive unit laterally to the chassis frame provides more available space above the drive unit for the car body.
In addition, the fact that the fasteners extend transversely with respect to the direction of travel ensures that they can be mounted and dismounted even in the case of a short wheelbase.
In particular, it can be provided that at least one fastener is disposed so as to penetrate the chassis frame, in general the longitudinal member, i.e., the entire box girder (both sidewalls), for example, or the web of the longitudinal member in the case of an I-beam as the longitudinal member.
Alternatively, the at least one fastener can penetrate only one sidewall of the longitudinal member (e.g., in the case of a box section as longitudinal member), but not the other sidewall.
If the height of the drive unit in the mounted state exceeds the height of the chassis frame, it may be advisable to provide at least one mounting bracket on the chassis frame, such as on a longitudinal member, where the mounting bracket is penetrated by a fastener. This bracket can be a flat plate, for example. In the operating state of the chassis frame, it is generally disposed vertically (i.e., normal to a chassis frame plane that is spanned by longitudinal and transverse members) and could be implemented, e.g., as an extension of the outer sidewall of the longitudinal member upwards above the longitudinal member.
In particular, but not only, by using brackets above and below the longitudinal member, all the fasteners disposed transversely with respect to the direction of travel are guided through brackets and project into the space above or below the chassis frame. In this case, the mounting of the drive unit is only above and below the longitudinal member and there is no penetration of the longitudinal member itself.
The fastener can basically be used to mount the drive unit to the chassis frame rigidly or via at least one elastic element. The advantage of the at least one elastic element is that the drive unit and chassis frame are decoupled from one another with respect to noise transmission and acceleration. The elastic elements act in conjunction with the fastener.
In general, the elastic element is fixedly connected to the drive unit, because the drive unit is easier to manipulate than the chassis frame.
However, the elastic element is alternatively fixedly connected to the chassis frame.
For both embodiments it is possible for the elastic element to be part of an inner bushing that is fixedly connected either to the chassis frame or to the drive unit and the respective other part (drive unit or chassis frame) is retained in the inner bushing using the elongated fastener. This embodiment of the elastic element is particularly suitable for a drive unit that is aligned transversely with respect to the direction of travel, and is therefore in general disposed between the two longitudinal members.
In principle, it would also be possible to use no elastic elements, but the decoupling effect would then be lost.
Bolts, e.g., together with a mating element, or screws can be provided as fasteners for all the embodiments. Both fasteners have the advantage of being detachable.
In the case of a bolt, this can be pressed into the other part so that the inserted bolt fulfills an emergency arresting function if the mating element fails.
In general, at least two or even four fasteners can be provided for each drive unit depending on the size thereof.
In an embodiment of the invention, the drive unit is disposed in the direction of travel, i.e., laterally outside the longitudinal member.
In another embodiment of the invention, the drive unit is disposed between the longitudinal members transversely with respect to the direction of travel.
Other objects and features of the present invention will become apparent from the following detailed description considered in conjunction with the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should be made to the appended claims. It should be further understood that the drawings are not necessarily drawn to scale and that, unless otherwise indicated, they are merely intended to conceptually illustrate the structures and procedures described herein.
For further explanation of the invention, reference will be made in the following part of the description to the accompanying drawings from which further advantageous embodiments, details and developments of the invention will emerge, in which:
If
The fastening of the screws 13 may be seen more clearly in
On both sides of the mounting bracket 12, i.e., on the inner and outer side of the longitudinal member 8, there is provided for each screw 13 an elastic motor mount 14 that can be implemented as in
Self-evidently, the motor mount 14 could also be of reverse design, i.e. the inner parts 151, 161 of the two mount halves 15, 16 as well as the screw 13 and the spacer sleeve 17 are fixedly connected to the chassis frame 1 (the longitudinal member 8 or rather the mounting bracket 12), while the outer parts 152, 162 are fixedly connected to the motor 3.
The motor mount 14 could also be implemented without elastic elements 6 if elastic support of the motor 3 on the chassis frame 1 is not required. The mount halves 15, 16 would then have a one-part design, where the parts 151 and 152, on the one hand, and parts 161 and 162, on the other, could therefore each be combined into one piece.
In the embodiments depicted in
In the case of a longitudinal arrangement of the motor 3, the elongated fastener have hitherto generally been disposed vertically, i.e., normal to the central longitudinal and transverse axis 10, 11.
As shown in
The bolt 4 is inserted through the chassis frame 1 on both sides of the bushing of the motor 3. With a mating element 5 implemented as a nut (a screw would also be possible) at the head of the bolt, the bolt 4 tensions the inner bushing 2 against the chassis frame 1 and therefore transmits the transverse forces.
The bolt 4 can be surrounded by an intermediate bushing 7 at the end of the shank where it is supported in the chassis frame 1, which serves to facilitate mounting. The longitudinal and vertical forces are transmitted via the mountings on the head and shank of the bolt 4.
As the reverse of
These embodiments of the elastic element depicted in
Transversely mounted motors 3 have hitherto mostly been screwed/bolted to the chassis frame in the direction of travel (parallel to the central longitudinal axis 10) or vertically (normal to the central longitudinal axis 10 and to the central transverse axis 11), whereas a connection by bolts 4 and mating elements 5 in the transverse direction is now proposed.
However, the type of connection by bolts 4 and mating elements 5 as shown in
In all the embodiments shown, the bolts 4 and screws 13 are dismountable and extend horizontally and normal to the direction of travel in the operating position of the chassis frame 1.
Thus, while there have been shown, described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those element steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.
| Number | Date | Country | Kind |
|---|---|---|---|
| A 50664/2014 | Sep 2014 | AT | national |
This is a U.S. national stage of application No. PCT/EP2015/068533 filed 12 Aug. 2015. Priority is claimed on Austrian Application No. A50664/2014 filed 22 Sep. 2014, the content of which is incorporated herein by reference in its entirety.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2015/068533 | 8/12/2015 | WO | 00 |
