JPH044185B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a bogie for a railway vehicle, and in particular to the relative yawing between the wheel axle and the bogie frame when the bogie runs on a track with a small curve radius. This invention relates to a bogie for a railway vehicle that generates motion and performs automatic steering so that the wheel axles always move in alignment with a curved track.

[Background of the invention]

In most of the railway vehicle bogies currently in practical use, the wheel axles placed at the front and rear of the bogie frame are each independently and relatively firmly elastically coupled in the longitudinal direction (travel direction of the vehicle) and in the lateral direction. It is called a non-steering trolley. With this type of bogie, there is no problem when the vehicle runs on a straight track, but when running on a curved track, the wheel flange surface is in contact with the inside of the rail head of the track, so the wheel flange This has the disadvantage of accelerating wear on the parts and rail heads, generating squeaking noises due to increased lateral pressure, and even causing the risk of running over and derailing, impeding running safety and speed improvement on curved roads. Furthermore, when running on a track with a small curve radius, the train receives extra resistance due to sliding contact between the wheel flange and the side surface of the rail head, resulting in a problem such as a significant increase in train resistance.

On the other hand, the direction of the front and rear wheel axles can be adjusted arbitrarily according to the degree of curvature of the curved road by using the yawing motion generated by the steering action caused by the contact between the worn-out tread of the wheel or the compound arc-shaped tread and the rail contact part. The above-mentioned problem is solved by preventing contact between the wheel flange surface and the rail head by using a so-called steering wheel that is biased so that the direction of travel of the wheels automatically matches the direction of travel of the curved track. However, the steering action based on the contact between the wheel tread and the rail contact portion has a limit to the steering force, and therefore cannot be sufficiently effective on tracks with a small curve radius. In addition, in order to make maximum use of the steering force mentioned above, it is necessary to minimize the longitudinal rigidity of the axle box support device for elastically supporting the wheel axle on the bogie frame, but on the other hand, this reduces the axle box support rigidity. This may reduce the speed at which snake behavior occurs.

Therefore, for example, Japanese Patent Publication No. 57-54344 discloses the provision of a device for forcibly driving the wheel shaft of the steering truck. However, the configuration disclosed herein is complicated and does not give any consideration to the installation of the electric motor that drives the wheel shaft.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a bogie for a railway vehicle that has a simple configuration and can align a wheel axle with a curved track without reducing the speed at which snaking occurs, and can also be equipped with an electric motor. .

[Summary of the invention]

The present invention provides two pairs of wheel axles that are supported so as to be movable in the front and rear directions of a bogie frame via bearings, and a steering device that automatically aligns the two pairs of wheel axles with a curved track and steers the two pairs of wheel axles. In a railroad vehicle bogie comprising a driving device that drives this steering device by a relative displacement force between the bogie frame and the car body supported by the bogie frame, the bogie frame is formed into a planar H shape, and the planar H shape a link that supports each of the bearings at each end of the steering device, and extends the steering device along a parallel beam of an H-shaped plane of the truck frame toward the central beam side of the truck frame; , and a coupling part that pivotally supports the extended sides of these links and is movable only in the width direction of the bogie frame, and the driving device is disposed on the side of the parallel beam to drive the coupling part. In addition, an electric motor for rotationally driving the wheel axle is disposed between the wheel axle and the center beam.

[Embodiment of the Invention] Fig. 1 is a schematic diagram showing a mode of a railway vehicle running on a curved track with a radius R centered at point 0, and Fig. 2 is a plan view of essential parts showing an embodiment of the invention. , and bogie frames 2 disposed at the front and rear of the vehicle body 1 in the traveling direction,
2' is shifted by an angle a around the bogie center points P and P' and travels along curved tracks R ₁ and R ₂ . Furthermore, wheel axles 3 arranged at the front and rear of the bogies 2, 2',
3' is also rotated (the outer rail R ₁ side widens by angle b), and by proceeding in alignment with the curved track, it becomes possible for the wheel flange to smoothly pass through the curve without contacting the rail head. . Note that the deflection angle a of the bogie frames 2 and 2' that occurs when traveling on a curved track with radius R is determined by a=L/2R, where L is the distance between bogie centers, It appears as a relative displacement from side to side. In addition, the wheel axle 3,
The required rotation angle b of 3' is when the distance between the axes is l,
Since it is determined by b=l/2R, it is sufficient to detect the deflection b on the side of the bogie and convert it by the ratio of l/L to rotate the wheel shaft.

FIG. 2 shows a mode in which the railway vehicle bogie 2 of the present invention travels on a curved track, where R ₁ is the outside rail of the curve and R ₂ is the inside rail. The railway vehicle bogie 2 of the present invention has links 6 protruding from brackets 5 disposed at both ends of wheel axles 3, 3' disposed at the front and rear in the direction of travel so as to be rotatable within a plane toward the center of the bogie. , installed near the center of the trolley, the trolley frame 2
The steering device 4 is constructed by rotatably connecting the other ends of the links 6 to each other by a sliding member 7 that is movable only in the left-right direction.

Additionally, a drive device 13 is installed that utilizes the relative displacement between the vehicle body 1 and the bogie frame 2 caused by the deflection of the bogie when passing through a curved track, and is configured to move the sliding body 7 of the steering device 4 from side to side. Then, the wheel axles 3, 3' can proceed along the curved tracks R ₁ , R ₂ in automatic alignment. That is, in FIG. 2, one end of a bell crank 9 rotatably supported on a bearing 8 installed on a bogie frame 2 and a bracket 10 fixed to the vehicle body 1 are connected by a tow bar 11, and the other end of the bell crank 9 is connected to a bracket 10 fixed to the vehicle body 1. It is connected to the sliding body 7 of the steering device 4 by a link 12. Now, if the vehicle is to travel from left to right on a curved road with radius R as in the embodiment shown in FIG.
Since the support bearing 8 approaches the bracket 10 that supports the tow bar 11 of the vehicle body 1, the bell crank 9 rotates counterclockwise, and the sliding body 7 is moved outward via the link 10 connected to the other end of the bell crank 9. Rail R ₁
In order to move it to the side, the wheel axle 3 at the front and rear of the bogie frame,
3', the distance between the wheels on the outer rail _R1 side is widened, and conversely, the distance between the wheels on the inner rail _R2 side is narrowed, so that the wheel axles 3 and 3' as a whole can move in alignment with the curved track. . In addition, the bogie frame 2 and wheel axle 3,
The amount of rotation 3' can be changed by appropriately selecting the fixing position of the bracket 10 and the distance between the bearing 8 of the bell crank 9 and the support portions at both ends. Further, as shown in another embodiment in FIG. 3, the drive device 13 of the steering device 4 is arranged symmetrically in the left and right direction of travel, and a play space (not shown) is provided in a part of each member constituting the drive device 13. It is possible to absorb the relative displacement in the longitudinal direction between the bogie frame 2 and the vehicle body 1 due to longitudinal vibration displacement, traction force, braking force, etc., and drive the steering device 4 only by the relative deviation on a curved road.

FIG. 4 is a plan view showing another embodiment of the present invention, which is composed of a driving device 15 connected by a rope 14 between the sliding body 7 of the steering device 4 and the bracket 10 fixed to the vehicle body 1. This has the advantage of simplifying the device with fewer moving parts. Reference numeral 16 denotes a pulley for converting the relative displacement in the longitudinal direction between the vehicle body 1 and the bogie frame 2 into the movement of the sliding body 7 in the left-right direction, and is supported by the bogie frame 2. In addition, the vibration displacement and traction force in the longitudinal direction generated between the car body and bogie mentioned above,
Displacement caused by braking force or the like can be avoided by stretching the rope 14.

By the way, in the embodiment, the truck frame 2
is H-shaped in plan, and H-shaped parallel beams 2A, 2
Wheel axles 3, 3' are elastically supported at each end of B. Each of the links 6 extends substantially along the parallel beams 2A and 2B, and the sliding body 7 is disposed along the H-shaped central beam 2C, and further includes a drive rod 11 and a rope 14. The devices 13, 15 are arranged on the sides of the parallel beams 2A, 2B. With such a configuration and arrangement, the wheel axles 3, 3' and the center beam 2
A space was created between the main motor 20 and C, and the main motor 20 was placed using this space.

Furthermore, FIG. 5 shows a detailed configuration example of the drive device 13 or 15 shown in FIGS. 2 to 4 described above.
A bell crank 9 and a tow bar 11 are rotatably supported on the truck frame 2, a bracket 10 is fixed to the tow bar 11 and the vehicle body 1, and a spherical bushing is provided at the joint between the rope (not shown) and the bracket 10. The vehicle body 1 is supported via 17, 18, etc.
It is possible to absorb vertical and horizontal vibrational displacements occurring between the carriage frame 2 and the bogie frame 2. Furthermore, as shown in FIG. 5, by connecting the tow bar 11 or rope (not shown) and the bracket 10 via a soft spring 19, it is possible to create a structure similar to that in which a play space is provided in the connecting part. It is possible to realize a drive device 13 or 15 that is effective and has no "backlash."

By employing the railway vehicle bogie of the present invention configured as described above, the drive device 13 that utilizes the deviation between the bogie frames 2, 2' and the car body 1 even when traveling on a curved road with a small radius. Alternatively, the steering device 4 can be driven by the steering device 4, and the wheel axles 3, 3' disposed at the front and rear of the bogie frames 2, 2' can be rotated while automatically aligning with the curved road. Since contact with the wheel flange and rail can be prevented, wear and noise of the wheel flange and rail can be reduced, driving safety including on curved roads can be improved, and maximum driving speed can be increased. Furthermore, it is possible to prevent an increase in train resistance (generally referred to as curve resistance) due to sliding contact between wheel flanges and rails, etc., and more economical train operation can be achieved.

Furthermore, the wheel axles 3, 3' can be controlled by only the steering device 4.
It is also possible to align the wheels with a curved track, but in that case, the longitudinal rigidity of the axle box support device (not shown) for elastically supporting each wheel axle 3, 3' should be made as small as possible, and the wheels It is necessary to maximize the yawing motion caused by the steering action caused by the contact between the wear-shaped tread surface or the compound arc-shaped tread surface and the rail contact area, but this will cause the wheel axles 3, 3' to have a twisting motion. Actions are more likely to occur. However, in the railway vehicle bogie of the present invention, the drive device 13 or 15, the steering device 4 is driven and the wheel axles 3, 3' are aligned with the curved road, so that the longitudinal rigidity of the axle box support device is stabilized against meandering motion. Even if the steering wheel is optimized, there is no adverse effect on steering performance, and it is possible to achieve both curve passing performance and prevention of snake movement. Furthermore, the steering device 4 and the drive devices 13 and 15 are arranged using the lower surfaces of the bogie frames 2, 2' and the side spaces between the bogie frames 2, 2' and the vehicle body 1, as shown in FIGS. 2 to 4. Therefore, there is an effect that the present invention can also be applied to a so-called drive truck on which the main electric motor 20 and the gear device 21 are mounted.

In addition, in the embodiment of the present invention shown in FIGS. 2 to 4, when traveling on a curved road, the bogie frame 2,
The drive device 13 of the steering device 4 mainly utilizes the relative displacement in the longitudinal direction that occurs between the steering device 2' and the vehicle body 1.
or 15, but it is similar if the steering device 4 is driven by utilizing the biasing action of the bogie on a curved road, such as the relative displacement in the left-right direction between the vehicle body and bogie instead of the relative displacement in the longitudinal direction. It can exert its action and effect. FIG. 6 shows a configuration example of a known truck equipped with a center pin 22 protruding from the car body 1 at the center of the truck frame, and the center pin 22 and the sliding body 7 of the steering device 4 are connected by a link device 23. The rotation between the vehicle body and the truck is transmitted to the sliding body 7 to drive the steering device 4. 7 and 8 utilize the relative displacement in the left and right direction between the car body and the bogie, and the levers 25 and 26 are fixed to the torsion shaft 24 supported on the bogie frame 2, and the levers 25 and 26 and the car body A bracket 27 fixed to the side surface of the steering wheel and the sliding body 7 of the steering device 4 are rotatably connected by links 28 and 29, respectively.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to obtain a bogie for a railway vehicle with a simple configuration that allows wheel axles to be aligned with a curved track without reducing the speed at which snaking occurs, and in which an electric motor can be installed. can.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a mode of a railway vehicle running on a curved track with a radius R centered on point 0, and FIG. 2 is a plan view of the main part in a curved track progressing state showing an embodiment of the present invention. It is a diagram. 3 and 4 are plan views of main parts showing other embodiments of the present invention, respectively,
FIG. 5 is a partially sectional front view showing an example of the configuration of the drive device in the embodiment shown in FIGS. 2 to 4. FIG. 6 is a plan view of a main part showing another embodiment of the present invention, FIG. 7 is a front view showing another embodiment of the invention, and FIG. 8 is a plan view of a main part of FIG. 7. 1...car body, 2,2'...bogie frame, 3,3'...
... Wheel axle, 4 ... Steering device, 6, 12 ... Link, 7 ... Sliding body, 9 ... Bell crank, 10
... Bracket, 11 ... Tow bar, 13, 15
... Drive device (steering device), 14 ... Rope, 19 ... Spring, 22 ... Center pin, 23 ...
link device.

Claims (1)

[Claims] 1. Two pairs of wheel axles supported so as to be movable in the longitudinal direction via bearings in the longitudinal direction of the bogie frame;
A railway vehicle comprising: a steering device that steers the two pairs of wheel axles in automatic alignment with a curved track; and a drive device that drives the steering device by a relative displacement force between the bogie frame and the car body supported by the bogie frame. In the truck, the truck frame is formed into a planar H-shape, each bearing is supported at each end of the planar H-shape, and the steering device is pivotally supported by the front-rear direction bearing and is mounted on the truck frame. A link extending along the parallel beam of the H-shaped plane to the center beam side of the bogie frame;
and a coupling part which pivotally supports the extension sides of these links and is movable only in the width direction of the bogie frame, and the driving device is disposed on the side of the parallel beam to drive the coupling part. What is claimed is: 1. A bogie for a railway vehicle, characterized in that an electric motor for rotationally driving the wheel axle is disposed between the wheel axle and the center beam.