Traveling mechanism for rail vehicles

Abstract

The invention relates to a running gear (FW1, FW2) for a rail vehicle, comprising a first wheelset (RS1), a bogie frame (DGR), a first wheelset link (RSL11) and a second wheelset link (RSL12). The first wheelset (RS1) is connected to the bogie frame (DGR) via two wheelset links (RSL11, RSL12). Each wheelset link (RSL11, RSL12) is designed as a triangular link and has three connection points (ASP111-ASP113, ASP121-ASP123) respectively. The corresponding first connection point (ASP111, ASP121) is designed as a floating support and connects the associated wheelset link (RSL11, RSL12) to the first wheelset (RS1). The corresponding third connection point (ASP113, ASP123) is designed as a fixed support and connects the associated wheelset link (RSL11, RSL12) to the bogie frame (DGR). According to the invention, a second connection point (ASP112) of a first wheelset linkage (RSL11) is connected to a first actuator (AKT11), and a second connection point (ASP112) of a second wheelset linkage (RSL12) is connected to a second actuator (AKT12). The actuators (AKT11, AKT12) are controlled and fixed in such a way that they orient the first wheelset (RS1) in a targeted manner to a turning radius (KR) or a track curve to be traveled when the rail vehicle is turning.

Description

Technical Field

[0001] The invention relates to a running gear for a rail vehicle, in particular for a locomotive. Background Art

[0002] In running gear for rail vehicles there is a fundamental conflict of objectives between, on the one hand, dynamic driving behavior when driving around bends and, on the other hand, driving stability when driving straight ahead at high speeds.

[0003] Figure 8 According to the known prior art, a running gear with two wheel sets RS1, RS2 is shown, which are connected to the rail vehicle via a bogie frame DGR. Fig. 9 Reference Figure 8 A detailed view is shown.

[0004] The first wheelset RS1 is connected to the bogie frame DGR via two wheelset links RSL11 , RSL12 assigned thereto, also referred to as triangular wheelset links.

[0005] In this case, the two wheel set links RSL11, RSL12 are arranged along an axis which is substantially perpendicular to the travel direction FRSF of the rail vehicle when the rail vehicle is travelling in a straight line.

[0006] The first wheelset link RSL11 of the first wheelset RS1 has three connection points ASP111 , ASP112 , ASP113 .

[0007] The first connection point ASP111 is designed here as a floating bearing and connects the first wheelset link RSL11 to the first wheelset RS1 .

[0008] The second connection point ASP112 and the third connection point ASP113 are designed as fixed supports and connect the first wheelset link RSL11 to the bogie frame DGR.

[0009] A fixed bearing blocks all displacement and allows one or more rotations about an axis of rotation at the bearing point.

[0010] In this case, the bearing point of the fixed bearing is fixed directly to the bogie frame, for example screwed, and supports the triangular-shaped connecting rod, which is movable relative to the bogie frame.

[0011] The floating bearing blocks one or two displacements and allows other displacements and one or more rotations at the bearing point. Here, the bearing point is free to move relative to the bogie frame.

[0012] The second wheelset link RSL12 of the first wheelset RS1 has three connection points ASP121 , ASP122 , ASP123 .

[0013] The first connection point ASP121 is designed here as a floating bearing and connects the second wheel set RSL12 to the first wheel set RS1.

[0014] The second connection point ASP122 and the third connection point ASP123 are designed as fixed supports and connect the second wheelset link RSL12 to the bogie frame DGR.

[0015] The same structure applies to the second wheelset RS2, which is connected to the bogie frame DGR via two wheelset links RSL21, RSL22 assigned thereto, also referred to as triangular wheelset links.

[0016] Here, the two wheel set links RSL21, RSL22 are arranged along an axis which is substantially perpendicular to the travel direction FRSF of the rail vehicle when the rail vehicle is traveling in a straight line.

[0017] The first wheelset link RSL21 of the second wheelset RS2 has three connection points ASP211 , ASP212 , ASP213 .

[0018] The first connection point ASP211 is designed here as a floating bearing and connects the first wheelset link RSL21 to the second wheelset RS2.

[0019] The second connection point ASP212 and the third connection point ASP213 are designed as fixed supports and connect the first wheelset link RSL21 to the bogie frame DGR.

[0020] The second wheelset link RSL22 of the second wheelset RS2 has three connection points ASP221 , ASP222 , ASP223 .

[0021] The first connection point ASP221 is designed here as a floating bearing and connects the second wheelset link RSL22 to the second wheelset RS2.

[0022] The second connection point ASP222 and the third connection point ASP223 are designed as fixed supports and connect the second wheelset link RSL22 to the bogie frame DGR.

[0023] The disadvantage of this solution is that when the rail vehicle travels on a track curve, due to the fixed position of the wheels, both the wheelset and the track will be greatly worn.

[0024] From DE 10 2013 224 582 A1 a running gear for a rail vehicle is known, in which a triangular linkage with hydraulic bushings is used in order to achieve a dynamic driving behavior.

[0025] A running gear for a rail vehicle is known from document DE 4424884 A1. Here, the wheel set link is arranged as a triangular link between the axle support and the bogie frame. Summary of the invention

[0026] The technical problem to be solved by the present invention is therefore to provide an undercarriage of the type described above, wherein on the one hand a dynamic driving behavior of the rail vehicle when driving on bends is achieved with less wear and on the other hand driving stability is achieved when the rail vehicle is driving straight at high speeds.

[0027] This technical problem is solved by the following technical solution.

[0028] The chassis according to the invention is designed for a rail vehicle or is part of a rail vehicle.

[0029] The walking mechanism comprises a first wheel set, a bogie frame, a first wheel set connecting rod and a second wheel set connecting rod.

[0030] The first wheel set is connected to the bogie frame by two wheel set connecting rods. Each wheel set connecting rod is designed as a triangular connecting rod and has three connection points respectively.

[0031] The respective first connection points of the two wheel set links are designed as floating bearings and connect the associated wheel set links to the first wheel set. The respective third connection points of the two wheel set links are designed as fixed bearings and connect the associated wheel set links to the bogie frame.

[0032] According to the invention, the second connection point of the first wheelset link is connected to the first actuator, and the second connection point of the second wheelset link is connected to the second actuator. The two actuators are controlled and fixed so that they specifically orient the first wheelset to the turning radius or the track curve to be traveled when the rail vehicle is turning.

[0033] The fixed bearing blocks all displacements and allows one or more rotations around the axis of rotation at the bearing point. Here, the bearing point of the fixed bearing is preferably directly fixed, for example screwed, to the bogie frame and supports a triangular link that is movable relative to the bogie frame.

[0034] The floating bearing blocks one or two displacements and allows other displacements and one or more rotations at the bearing point. Here, the bearing point is preferably freely movable relative to the bogie frame.

[0035] According to the present invention, the running gear has a second wheel set. For the second wheel set, the running gear has a first wheel set connecting rod and a second wheel set connecting rod. The second wheel set is connected to the bogie frame via two wheel set connecting rods.

[0036] Each wheel link is designed as a triangular link and has three connection points:

[0037] - the respective first connection points of the two wheelset links are designed as floating bearings and connect the associated wheelset link to the second wheelset,

[0038] - the respective third connection points of the two wheelset links are designed as fixed supports and connect the associated wheelset links to the bogie frame,

[0039] - the second connection point of the first wheel group connecting rod of the second wheel group is connected to the second connection point of the first wheel group connecting rod of the first wheel group via the first actuator, and

[0040] The second connection point of the second wheelset connecting rod of the second wheelset is connected to the second connection point of the second wheelset connecting rod of the first wheelset via a second actuator.

[0041] In an alternative development of the running gear, which is not claimed, the second connection point of the first wheelset link is connected to a fixed support fixed to the bogie frame via a first actuator. Correspondingly, the second connection point of the second wheelset link is connected to a fixed support fixed to the bogie frame via a second actuator.

[0042] In an advantageous embodiment, the actuator is controlled and fixed in such a way that it is arranged in the same way when the rail vehicle is traveling in a straight line.

[0043] In an advantageous embodiment, the actuator is designed as an electric servomotor or as a mechanical actuator.

[0044] In an advantageous embodiment, the mechanical actuator is designed as a pneumatic actuator or a hydraulic actuator or a hybrid.

[0045] By means of the invention, wear during cornering is minimized with low additional effort.

[0046] The invention achieves optimized driving stability even at high speeds.

[0047] By means of the invention, an optimized steering of the wheelset is achieved, thereby achieving an optimal track contact in track curves.

[0048] Thus, an increased traction performance of the rail vehicle is achieved by the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. In the accompanying drawings:

[0050] Figure 1 The design scheme of the walking mechanism according to the present invention is shown.

[0051] Figure 2 Shows Figure 1 Details,

[0052] Figure 3 Reference Figure 1 and Figure 2 The traveling mechanism according to the invention is shown when traveling in a straight line.

[0053] Figure 4 Reference Figure 1 and Figure 2 The traveling mechanism according to the present invention is shown when driving on a curve.

[0054] Figure 5 Another design scheme of the running mechanism which is not claimed is shown.

[0055] Figure 6 Shows Figure 5 Details,

[0056] Figure 7 Reference Figure 5 and Figure 6 The traveling mechanism according to the present invention is shown when driving on a curve.

[0057] Figure 8 and Fig. 9 The chassis described in the introduction according to the prior art is shown. DETAILED DESCRIPTION

[0058] Figure 1 and Figure 2 The embodiment of the traveling mechanism FW1 according to the present invention is shown.

[0059] The running gear FWL has a first wheel set RS1 and a second wheel set RS2, which are connected to the rail vehicle via a bogie frame DGR.

[0060] The first wheelset RS1 is connected to the bogie frame DGR via two wheelset links RSL11 , RSL12 assigned thereto, also referred to as triangular wheelset links.

[0061] In this case, the two wheel set links RSL11 , RSL12 of the first wheel set RS1 are arranged along an axis which is substantially perpendicular to the travel direction FRSF of the rail vehicle when the rail vehicle is travelling in a straight line.

[0062] The first wheelset link RSL11 of the first wheelset RS1 has three connection points ASP111 , ASP112 , ASP113 .

[0063] The first connection point ASP111 of the first wheelset link RSL11 is designed as a floating bearing and connects the first wheelset link RSL11 to the first wheelset RS1 .

[0064] The second connection point ASP112 of the first wheelset link RSL11 is connected via the first actuator AKT11 to a second connection point ASP212 of the first wheelset link RSL21 , wherein the first wheelset link RSL21 is assigned to the second wheelset RS2 .

[0065] The third connection point ASP113 of the first wheelset link RSL11 of the first wheelset RS1 is designed as a fixed bearing and connects the first wheelset link RSL11 to the bogie frame DGR.

[0066] The second wheelset RS2 is constructed similarly and is connected to the bogie frame DGR via two wheelset links RSL21 , RSL22 assigned thereto, also referred to as triangular wheelset links.

[0067] Here, the two wheel set links RSL21, RSL22 of the second wheel set RS2 are arranged along an axis which is substantially perpendicular to the travel direction FRSF of the rail vehicle when the rail vehicle travels in a straight line.

[0068] The first wheelset link RSL21 of the second wheelset RS2 has three connection points ASP211 , ASP212 , ASP213 .

[0069] The first connection point ASP211 of the first wheelset link RSL21 is designed as a floating bearing and connects the first wheelset link RSL21 to the second wheelset RS2.

[0070] The second connection point ASP212 of the first wheelset link RSL21 is connected to the second connection point ASP112 of the first wheelset link RSL11 via the first actuator AKT11 , wherein the first wheelset link RSL11 is assigned to the first wheelset RS1 .

[0071] The third connection point ASP213 of the first wheelset link RSL21 of the second wheelset RS2 is designed as a fixed support and connects the first wheelset link RSL21 to the bogie frame DGR.

[0072] The above structure continues in a mirror-symmetrical manner with respect to the direction of travel FRSF of the rail vehicle, so that the following applies:

[0073] The second wheelset link RSL12 of the first wheelset RS1 has three connection points ASP121 , ASP122 , ASP123 .

[0074] The first connection point ASP121 of the second wheelset link RSL12 is designed as a floating bearing and connects the second wheelset link RSL12 to the first wheelset RS1.

[0075] The second connection point ASP122 of the second wheelset link RSL12 is connected to a second connection point ASP222 of the second wheelset link RSL22 via a second actuator AKT12 , wherein the second wheelset link RSL22 is assigned to the second wheelset RS2 .

[0076] The third connection point ASP123 of the second wheelset link RSL12 of the first wheelset RSL is designed as a fixed support and connects the second wheelset link RSL12 to the bogie frame DGR.

[0077] The second wheelset RS2 is constructed similarly and is connected to the bogie frame DGR via two wheelset links RSL21 , RSL22 assigned thereto, also referred to as triangular wheelset links.

[0078] Here, the two wheel set links RSL21, RSL22 are arranged along an axis which is substantially perpendicular to the travel direction FRSF of the rail vehicle when the rail vehicle is traveling in a straight line.

[0079] The second wheelset link RSL22 of the second wheelset RS2 has three connection points ASP221 , ASP222 , ASP223 .

[0080] The first connection point ASP221 of the second wheelset link RSL22 is designed as a floating bearing and connects the second wheelset link RSL22 to the second wheelset RS2.

[0081] The second connection point ASP222 of the second wheelset link RSL22 is connected to the second connection point ASP122 of the second wheelset link RSL12 via the second actuator AKT12 , wherein the second wheelset link RSL12 is assigned to the first wheelset RS1 .

[0082] The third connection point ASP223 of the second wheelset link RSL22 of the second wheelset RS2 is designed as a fixed support and connects the second wheelset link RSL22 to the bogie frame DGR.

[0083] The two actuators AKT11 and AKT12 serve as adjustment mechanisms for the two wheel sets RS1 , RS2 of the running gear FW1 .

[0084] The two actuators AKT11 and AKT12 are therefore functionally coupled to one another. The two actuators are controlled or actuated as follows.

[0085] When the rail vehicle is turning, the two actuators AKT11 and AKT12 are controlled to rotate the two wheel sets RS1 and RS2. The purpose of this is to optimally orient the two wheel sets RS1 and RS2 to the turning path or turning radius to be traveled. This minimizes wear when turning.

[0086] When the rail vehicle is traveling in a straight line, the two actuators AKT11 and AKT12 are controlled in the same way. The two wheelsets RS1, RS2 are thus oriented for traveling in a straight line and are locked or latched by the two actuators AKT11 and AKT12, which take over the fixed bearing functionality at their connection points.

[0087] Figure 2 Also shown are two linear guides LF111 , LF112 which are coupled to the actuator AKT11 .

[0088] In a preferred embodiment, such a linear guide is a component of the described solution or a component of the actuator used in the invention, even if it is not shown in detail in the following figures.

[0089] Figure 3 Reference Figure 1 , Figure 2 The positions of the two actuators AKT11 , AKT12 are shown when the rail vehicle is traveling in a straight line on the straight track GL.

[0090] In this case, the two actuators AKT11 and AKT12 are set or controlled in the same way.

[0091] Both wheel sets are therefore oriented in the same way for straight-ahead travel and are arranged so as not to rotate.

[0092] Figure 4 Reference Figure 1 , Figure 2 The position of the two actuators AKT11 , AKT12 is shown when the rail vehicle is traveling along a curve on a track GL which is laid along a curve with a curve radius KR.

[0093] In this case, the two actuators AKT11 and AKT12 are arranged differently from one another, so that the two wheel sets RS1 , RS2 are oriented or arranged in a targeted manner to the turning radius KR or the track curve.

[0094] The two actuators AKT11, AKT12 are preferably designed as electric servomotors or as mechanical actuators based on pneumatic or hydraulic control principles. Suitable hybrid actuators are also conceivable.

[0095] Figure 5A second non-claimed design of the running gear FW2 is shown, and Figure 6 Shows Figure 5 details.

[0096] The running gear FW2 has two wheel sets RS1, RS2, which are connected to the rail vehicle via a bogie frame DGR.

[0097] The first wheelset RS1 is connected to the bogie frame DGR via two wheelset links RSL11 , RSL12 assigned thereto, also referred to as triangular wheelset links.

[0098] In this case, the two wheel set links RSL11, RSL12 are arranged along an axis which is substantially perpendicular to the travel direction FRSF of the rail vehicle when the rail vehicle is travelling in a straight line.

[0099] The first wheelset link RSL11 of the first wheelset RS1 has three connection points ASP111 , ASP112 , ASP113 .

[0100] The first connection point ASP111 is designed as a floating bearing and connects the first wheelset link RSL11 to the first wheelset RS1 .

[0101] The second connection point ASP112 is connected via a first actuator AKT21 to a fixed bearing which is fixed to the bogie frame DGR.

[0102] The third connection point ASP113 is designed as a fixed bearing and connects the first wheelset link RSL11 to the bogie frame DGR.

[0103] The second wheelset link RSL12 of the first wheelset RS1 has three connection points ASP121 , ASP122 , ASP123 .

[0104] The first connection point ASP121 is designed here as a floating bearing and connects the second wheelset link RSL12 to the first wheelset RS1 .

[0105] The second connection point ASP122 is connected via a second actuator AKT22 to a fixed bearing which is fixed to the bogie frame DGR.

[0106] The third connection point ASP123 is designed as a fixed bearing and connects the second wheelset link RSL12 to the bogie frame DGR.

[0107] The same structure applies to the second wheelset RS2, which is connected to the bogie frame DGR via two wheelset links RSL21, RSL22 assigned thereto, also referred to as triangular wheelset links.

[0108] Here, the two wheel set links RSL21, RSL22 are arranged along an axis which is substantially perpendicular to the travel direction FRSF of the rail vehicle when the rail vehicle is traveling in a straight line.

[0109] The first wheelset link RSL21 of the second wheelset RS2 has three connection points ASP211 , ASP212 , ASP213 .

[0110] The first connection point ASP211 is designed here as a floating bearing and connects the first wheelset link RSL21 to the second wheelset RS2.

[0111] The second connection point ASP212 is connected via a third actuator AKT23 to a fixed bearing which is fixed to the bogie frame DGR.

[0112] The third connection point ASP213 is designed as a fixed support and connects the first wheelset link RSL21 to the bogie frame DGR.

[0113] The second wheelset link RSL22 of the second wheelset RS2 has three connection points ASP221 , ASP222 , ASP223 .

[0114] The first connection point ASP221 is designed here as a floating bearing and connects the second wheelset link RSL22 to the second wheelset RS2.

[0115] The second connection point ASP222 is connected via a fourth actuator AKT24 to a fixed bearing which is fixed to the bogie frame DGR.

[0116] The third connection point ASP223 is designed as a fixed support and connects the second wheelset link RSL22 to the bogie frame DGR.

[0117] Figure 7 Reference Figure 5 and Figure 6 The chassis according to the invention is shown when driving around a bend.

[0118] When the rail vehicle is traveling in a straight line, the four actuators AKT21 to AKT24 are set or controlled in the same way. The two wheel sets RS1, RS2 are then oriented in the same way for traveling in a straight line or are arranged so as not to rotate.

[0119] During the curve travel of the rail vehicle shown here, the four actuators AKT21 to AKT24 are arranged in such a way that the two wheel sets RS1 , RS2 are oriented or arranged in a targeted manner on the curve radius or the track curve.

[0120] The actuators AKT21 to AKT24 are preferably designed as electric servomotors or mechanical actuators based on pneumatic or hydraulic control principles. Suitable hybrid actuators are also conceivable.

Claims

1. A running gear (FW1) for a rail vehicle, - having a first wheelset (RS1), a bogie frame (DGR), a first wheelset link (RSL11) and a second wheelset link (RSL12), -in, The first wheelset (RS1) is connected to the bogie frame (DGR) via two wheelset links (RSL11, RSL12), -in, Each wheel link (RSL11, RSL12) is designed as a triangular link and has three connection points (ASP111-ASP113, ASP121-ASP123). - wherein the respective first connection points (ASP111, ASP121) of the two wheelset links (RSL11, RSL12) are designed as floating bearings and connect the associated wheelset links (RSL11, RSL12) to the first wheelset (RS1), - wherein the respective third connection point (ASP113, ASP123) of the two wheelset links (RSL11, RSL12) is designed as a fixed support and connects the associated wheelset link (RSL11, RSL12) to the bogie frame (DGR), - wherein the second connection point (ASP112) of the first wheel linkage (RSL11) is connected to the first actuator (AKT11), - wherein the second connection point (ASP122) of the second wheel linkage (RSL12) is connected to a second actuator (AKT12), wherein the two actuators (AKT11, AKT12) are controlled and fixed in such a way that, when the rail vehicle is turning, they orient the first wheelset (RS1) in a targeted manner to a turning radius or a track curve to be traveled, - wherein the walking mechanism (FW1) has a second wheel set (RS2), - wherein, for the second wheelset (RS2), the running gear has a first wheelset link (RSL21) and a second wheelset link (RSL22), and wherein the second wheelset (RS2) is connected to the bogie frame (DGR) via two wheelset links (RSL21, RSL22), wherein, in the case of the second wheelset (RS2), each wheelset link (RSL21, RSL22) is designed as a triangular link and has three connection points (ASP211-ASP213, ASP221-ASP223), wherein, in the case of a second wheelset (RS2), the respective first connection point (ASP211, ASP221) of the two wheelset links (RSL21, RSL22) is designed as a floating bearing and connects the associated wheelset link (RSL21, RSL22) to the second wheelset (RS2), - wherein, in the case of the second wheelset (RS2), the respective third connection point (ASP213, ASP223) of the two wheelset links (RSL21, RSL22) is designed as a fixed support and connects the associated wheelset link (RSL21, RSL22) to the bogie frame (DGR), wherein, in the case of the second wheelset (RS2), the second connection point (ASP212) of the first wheelset link (RSL21) is connected to the second connection point (ASP112) of the first wheelset link (RSL11) of the first wheelset (RS1) via the first actuator (AKT11), and - wherein, in the case of the second wheelset (RS2), the second connection point (ASP222) of the second wheelset link (RSL22) is connected to the second connection point (ASP122) of the second wheelset link (RSL12) of the first wheelset (RS1) via the second actuator (AKT12).

2. The walking mechanism according to claim 1, wherein: The actuators are controlled and fixed in such a way that they are arranged in the same way when the rail vehicle is traveling in a straight line.

3. The walking mechanism according to claim 1 or 2, wherein: The actuator is designed as an electric servomotor or as a mechanical actuator.

4. The walking mechanism according to claim 3, wherein: The mechanical actuator is designed as a pneumatic actuator or a hydraulic actuator.

5. A rail vehicle, comprising a running mechanism according to any one of claims 1 to 4.

Images