Patent Application
20230302973
The invention relates to a driver's seat for a rail vehicle, in particular a train driver's seat.
An extremely wide range of driver's seats with different functionalities are known for rail vehicles.
Simpler and cheaper rail vehicle driver's seats normally have a moderate level of spring comfort, which is realized by means of mechanical springing.
In these driver's seats, pneumatic and/or electric assistance for the ergonomic adjustment of the driver's seat to the needs of the rail vehicle driver is also dispensed with because of the costs.
More complicated driver's seats are normally compressed-air assisted and have substantially higher comfort and additional functionalities (e.g. these provide lower lumbar support or assistance for the rail vehicle driver during a seat adjustment carried out by the driver).
Such compressed-air assisted driver's seats have a corresponding compressed air supply, in which a compressed air hose is usually guided in the interior of a vertical hollow steel tube. The actual seat for the rail vehicle driver is fastened to this steel tube (e.g. via a screw connection or via a welded connection). The compressed air hose is not rigid but flexible and is guided in such a way that rotational movements of the seat in the horizontal plane are made possible.
As a result, the compressed air hose is located in the region of the axis of rotation of the seat, so that a right-left rotation of the seat about the axis of rotation in the horizontal plane is easily possible. Advantageously, the compressed air hose is only slightly twisted here.
As a further advantage, the flexible compressed air hose also permits a forward-backward movement of the seat to a low extent, which is necessary as a result of a seat adaptation to the rail vehicle driver.
The disadvantage with this concept is that limits with respect to possible movement travels (maximum rotational angles and maximum displacement travels) are reached relatively quickly.
Furthermore, the concept described is not suitable for all conceivable configurations. For example, if there is a bearing point of the seat under the seat, it is necessary to dispense with a hollow shaft and therefore with the central hose guidance.
An alternative solution for an off-center compressed air guidance, according to the prior art, consists in arranging a single flexible hose with a large loop in such a way that movements are permitted. This loop is then located between the fixed and the rotatable and displaceable part of the seat and typically projects a long way. As a result, there is the danger of damage to the hose as an individual walks past or during rotation of the seat.
The object of the present invention is, therefore, to provide an improved driver's seat for a rail vehicle with which the aforementioned disadvantages can be overcome cost effectively.
This object is achieved by the features of claim 1. Advantageous developments are specified in the respective dependent claims.
The invention relates to a driver's seat for a rail vehicle, in particular a train driver's seat.
The driver's seat includes a seat, frame, a support and a compressed air line, which ensures compressed-air assisted functionalities of the driver's seat.
The seat is designed for use by a rail vehicle driver.
The frame which supports the seat is rotatably connected to a first end of the support such that the seat is rotatable about an axis of the support. A second end of the support can be connected to a fastening unit. The compressed air line is arranged in relation to the seat, the frame and the support in such a way that the compressed air assisted functionalities of the seat are insured.
According to the invention, the compressed air line in a first region is implemented as at least one partial coil, which runs at least partly around the support at a predefined distance. The at least one partial coil is formed and fastened in such a way that a rotational movement of the seat effects a change in the distance of the at least one partial coil relative to the support.
In an advantageous development, the compressed air line in a second region is implemented as at least one partial loop. It is designed and fastened in such a way that a translational movement of the seat effects a change in the shape of the partial loop. The translational movement, which is preferably carried out in a horizontal plane, effects a change in the shape in which the compressed air line is laid and results in compression or extension of the partial loop.
In an advantageous development, the at least one partial coil runs radially around the support. The rotational movement of the seat, which is preferably carried out in the horizontal plane, effects a change in the shape in which the compressed air line is laid and results in a change of the radius of the at least one partial coil.
In an advantageous development, the second end of the support is connected to the fastening unit in order to fasten the support in a control console of the rail vehicle.
In an advantageous development, a pneumatic suspension and/or a pneumatic seat adjustment, to which the compressed air line is fed to implement and ensure the pneumatic functionality, is arranged between the frame and the seat.
In an advantageous development, the support is formed as a tube or as a profile, which is arranged standing substantially vertically between the fastening unit and the frame.
In an advantageous development, the first region of the compressed air line is connected at its first end to the fastening unit and at its second end to the frame, in order to permit the change in distance and change in radius of the at least one partial coil.
In an advantageous development, the second region of the compressed air line is connected at its first end to the seat and/or to the pneumatic suspension and/or to the pneumatic seat adjustment, while its second end is connected to the frame in order to permit the change in shape of the partial loop.
In an advantageous development, the at least one partial coil is produced from an elastic rigid material, preferably from polyamide or the like.
In an advantageous development, a plurality of partial coils of the compressed air line form a spiral, which is wound around the support at a predefined distance from the support.
In an advantageous development, the at least one partial loop is produced from a flexible hose material, for example it is implemented as a fabric-covered rubber hose.
In an advantageous development, the partial loop is dimensioned in such a way that, in a central position of the seat, the partial loop has a mechanically unstressed shape which is changed, specifically either extended or compressed during a translational movement of the seat.
In a preferred development, the second end of the support is arranged opposite the first end of the support. The rotation of the seat is preferably carried out about a longitudinal axis of the support.
In summary, in the present invention, a rotation of the seat in a first direction (e.g. clockwise) effects an enlargement in the distance or the radius of the at least one partial coil, while a rotation of the seat in a second direction opposite thereto (e.g. counterclockwise) effects a reduction in the radius of the at least one partial coil.
In a corresponding way, a translational movement of the seat in a first direction (e.g. parallel to a direction of travel of the rail vehicle directed forward) effects an extension of the at least one partial loop, while a translational movement of the seat in a second direction opposite thereto (e.g. parallel to a direction of the travel of the rail vehicle directed rearward) effects a compression of the at least one partial loop.
A number of partial coils or coils needed for the functionality and the associated nominal radius are matched to a permissible predefined rotational angle of the seat and to a predefined diameter of the support.
By means of the selection of the material for the at least one partial coil and for resultant coils, a predefined shape and position is ensured.
By means of the present invention, a long-lasting driver's seat configuration is achieved, and therefore a high quality standard of the seat construction is ensured.
The present invention avoids the disadvantageous undefined deformation of the flexible compressed air hose that is known from the prior art, which arises in particular as a result of superimposing the rotational and displacement movement.
By means of the present invention, chafing and bending points on the compressed air line are avoided.
By means of the present invention, separation of the compressed air supply into a proportion for the seat rotational movement and into a proportion for the seat displacement movement is implemented.
The present invention makes it possible to optimize the respective material of the compressed air line and therefore its mechanical properties to the movement profile.
By means of the present invention, the compressed air supply is divided into two functionalities or component parts. A first proportion is provided exclusively for the compensation of the rotational movement of the seat, while a second proportion is provided exclusively for the compensation of the translational movement of the seat.
The present invention will be explained in more detail below by way of example with reference to a drawing, in which:
The driver's seat FS includes compressed-air assisted functionalities which are functionally ensured and implemented via a compressed air line DLG, which is part of the driver's seat FS.
The driver's seat FS has a seat SIT, a frame RAH, a support TRG and a fastening unit BFE.
The seat SIT is connected to a first end of the support TRG via the frame RAH, which supports the seat SIT. A second end of the carrier TRG is connected to the fastening unit BFE.
The seat SIT is designed for use by a rail vehicle driver and is rotatably mounted about an axis of the support TRG.
The fastening unit BFE is designed for a fastening of the support TRG in a control console of the rail vehicle (not specifically illustrated here).
The compressed air line DLG in a first region B1 is implemented as at least one partial coil, which runs radially around the support TRG.
The at least one partial coil is formed and fastened in such a way that a rotational movement of the seat SIT effects a change in the radius of the partial coil.
Thus, the radius change compensates for the rotational movement of the seat SIT that is carried out.
The compressed air line DLG in a second region B2 is implemented as at least one partial loop. This partial loop is formed and fastened in such a way that a translational movement of the seat SIT is compensated by a change in shape of the partial loop.
The frame RAH which supports the seat SIT is rotatably connected to a first end of the support such that the seat is rotatable.
The second end of the support TRG is arranged opposite the first end of the support TRG. Here, the support TRG is formed as a tube, which is arranged standing substantially vertically between the fastening unit BFE and the frame RAH.
A pneumatic suspension and/or pneumatic seat adjustment, to which the compressed air line DLG is fed to implement the pneumatic functionality, is arranged between the frame RAH and the seat SIT.
The first region B1 of the compressed air line DLG (with the at least one partial coil) is connected at its first end to the fastening unit BFE and by its second end to the frame RAH. As a result, it is fixed such that the above-described change in radius of the at least one partial coil is permitted.
In a preferred development, the second region B2 of the compressed air line (with the at least one partial loop) is connected at its first end to the seat SIT and to the pneumatic suspension and/or to the pneumatic seat adjustment, while its second end is connected to the frame RAH. As a result, it is fixed such that the above-described change in shape of the partial loop is permitted.
The partial coil is produced from an elastic rigid material, for example from polyamide or the like.
As illustrated here, a plurality of partial coils of the compressed air line DLG form a spiral, which is wound around the support TRG at a predefined distance from the support TRG.
Additional protective sheets SCHB are provided to protect the compressed air hose and its fastenings against damage.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2020 207 998.6 | Jun 2020 | DE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2021/064140 | 5/27/2021 | WO |
