JPH0370663B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a two-shaft electric bogie for a railway vehicle.

[Background of the invention]

In conventional railway bogies, the axle box is rigidly supported in the longitudinal direction to maintain the parallelism of the two axes, in order to prevent the generation of vibration due to the tread slope of the wheels during running. Ta. For this reason, when traveling on a curve, the wheels geometrically shift in angle from the rail in the traveling direction, resulting in wear of the wheel flanges and generation of grinding noise.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A conventional two-shaft electric trolley having a parallel cardan type drive device will be explained with reference to FIGS. 1 and 2. wheel set 1,
1' supports a bogie frame 4 at both ends thereof via axle boxes 2, 2' and spring devices 3, 3', and further supports a vehicle body 6 via a pillow spring device 5. The electric motors 7, 7' are fixed to the horizontal beams 8, 8', the drive devices 9, 9' are also elastically connected to the horizontal beams 8, 8', and there is a deflection shaft between the electric motors 7, 7' and the drive devices 9, 9'. Fitting 1
This is a structure in which they are bonded at 0,10'. Therefore,
The reaction force of the rotational torque of the electric motors 7, 7' and the drive devices 9, 9' is received by the horizontal beams 8, 8'. The axle box bodies 2, 2' are moved forward and backward by the axle box guards 11, 11' on the bogie frame 4.
Left and right movements are restricted. The rotational torque generated in the electric motors 7, 7' is transferred to the flexible shaft couplings 10, 1.
0', is transmitted to the wheel axles 1, 1' via the drive devices 9, 9', and is transmitted to the vehicle body 6 via the axle box bodies 2, 2', the axle box protectors 11, 11', the bogie frame 4, and the anchor 12 of the pillow spring device 5. can be conveyed to.

While traveling on a curve, the wheel sets 1 and 1' are restrained by the bogie frame 4, as shown in A in FIG. 7, so the vehicle travels at an angle θ with respect to the center O of the curve. As a result, the flanges come into contact with the rails, causing wear on the flanges and rails and causing squeaking noise.

[Purpose of the invention]

The object of the present invention is to prevent the entire bogie from snaking, to prevent wheel flange wear and squeak noise when traveling on curves, and to prevent rocking of each wheel axle. Our objective is to provide a two-axis electric trolley.

[Summary of the invention]

The present invention provides a bogie frame formed in a substantially H shape, wheel axles arranged at the front and rear of the bogie frame, and wheels installed at both ends of each wheel axle so that the bogie frame is mounted on the front, rear, right, left, and right sides of the bogie. a spring device that provides elastic support with low support rigidity in the direction; a drive device installed on each wheel axle; an electric motor connected to the drive device with its rotational axis arranged parallel to the respective wheel axles; A connecting beam that connects the spring devices installed at each end, supports the drive device and the electric motor, and is held rotatably around a vertical axis on the bogie frame at a central position in the width direction of the bogie, and corresponds to each wheel axle. The connecting beams are connected at points symmetrical with respect to the center of the bogie, and the attenuator connects the connecting beams corresponding to each wheel axle on one side in the width direction of the bogie to attenuate relative displacement between the two. It is characterized by this.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 3 to 6.

In the figure, the same reference numerals as in the previous conventional example indicate the same members. Axle boxes 2, 2' installed at both ends of each wheel axle 1, 1' elastically support a bogie frame 4 via spring devices 3, 3'. Note that the truck frame 4 is formed into a substantially H-shape as a whole. The spring devices 3, 3' have low support rigidity in the front-rear direction and left-right direction of the bogie, and each wheel axle 1 has a connecting beam 1 formed in a U-shaped cross section to be described later with respect to the bogie frame.
It is possible to swing within the horizontal plane within the range allowed by 3 and 13'. The axle boxes 2, 2' installed at both ends of each wheel axle 1, 1' are connected to a connecting beam 1, respectively.
3, 13'. Further, electric motors 7, 7' whose rotating shafts are arranged parallel to the wheel axle are fixed to the connecting beams 13, 13', and drive devices 9, 9' provided on the wheel axle are fixed to the connecting beams 13, 13'.
one end of which is elastically connected. Further, the connecting beams 13, 13' are configured such that the central portions of the connecting beams 13, 13' can swing in the horizontal plane via anti-vibration rubbers 14, 14' and pins 15, 15'.
installed on. In other words, the connecting beams 13,1
3', vibration isolating rubber 14, 1 is installed at the center in the width direction of the bogie.
4' and pins 15, 15' are inserted between flanges protruding parallel to the side surfaces of the cross beams 8, 8' together with vibration isolating rubbers 14, 14'. ' is passed through the hole to be pivotally supported. Also,
Swing plates 16, 16' are provided on both sides of the vibration isolating rubbers 14, 14' of the connecting beams 13, 13' with flanges protruding parallel to the side surfaces of the cross beams 8, 8'. This is to provide resistance to and attenuate the swinging of the connecting beams 13, 13' in the horizontal plane.

Incidentally, the drive devices 9 and 9' are arranged at point-symmetrical positions with respect to the center of the truck, and are connected by a link 17. Therefore, when the wheel set 1 swings around the pin 15, the wheel set 1' connected by the link 17
They also oscillate, and each movement is in the opposite direction. Note that the link 17 is installed by connecting the connecting beam 13,
13' or electric motors 7, 7', that is, any motor that operates integrally with the connecting beams 13, 13' may be used. Further, the connecting beams 13 and 13' are provided with an attenuator 18 that connects the respective positions on one side in the width direction of the bogie. This attenuator 18 is for attenuating the relative movement of the connecting beams 13, 13' due to their connection by the link 17.

In such a configuration, the reaction force due to the rotational torque of the electric motors 7, 7' and the drive devices 9, 9' and the longitudinal force generated on the wheel axles 1, 1' are transferred to the connecting beams 13, 1.
3', anti-vibration rubber 14, 14' and pin 15, 1
5', and is transmitted to the bogie frame 4 (cross beams 8, 8') via sliding plates 16, 16'. Furthermore, the wheel axles 1, 1', etc., which are integrally operated by the connecting beams 13, 13' connected by the link 17, have spring devices 3, 3' that keep the support rigidity low in the front and rear and left and right directions of the bogie. Therefore, there is no problem with movement in the horizontal plane.

In such a configuration, its operating status will be explained. First, when the bogie approaches a curved track, the wheelset 1, 1' performs a self-steering operation depending on the slope of the tread. For this behavior,
The structure in which the parts that operate integrally by the connecting beams 13 and 13' are connected by the link 17 allows each wheel set 1 and 1' to be synchronized. And, each wheel set 1, 1' is as shown in B of Fig. 7,
It operates so that the center of each axis points toward the center of the curved trajectory. Therefore, as in the conventional case, each wheel axle has an angle difference θ.
This prevents wheel flange wear and squeaks from occurring. Note that the frequency of the steering operation of the wheel sets 1 and 1' is lower than that of the vibration of the wheel set itself or the meandering motion of the truck, and the characteristics of the damper 18 have no effect on this steering operation. . On the other hand, the damper 18 has a characteristic that exhibits its damping ability with respect to vibrations of the wheel shaft itself other than the above-mentioned steering operation and meandering motion of the entire bogie.

On the other hand, regarding the case where the trolley travels in a straight line,
This will be explained below. To deal with meandering vibrations during straight running, the wheel sets 1 and 1' are connected by a link 17 and a damper 18 is provided, so that vibrations between the respective wheel sets are damped. That is, in the past, each wheel axle was firmly held in the front, rear, left, and right directions of the truck, but the support rigidity is suppressed by the spring device as described above, and the above-mentioned snaking behavior is prevented by providing a damping means. be able to.

〔Effect of the invention〕

As explained above, according to the present invention, since the attenuator attenuates the behavior of each wheel axle when traveling in a straight line, it is possible to prevent the meandering behavior of the entire bogie, and to synchronize each wheel axle when traveling on a curve. Since the steering operation is performed while the vehicle is running on a curve, wear of the wheel flanges and generation of squealing noise can be prevented when driving on curves.

[Brief explanation of drawings]

FIG. 1 is a plan view of a conventional two-shaft electric trolley, FIG. 2 is a side view thereof, FIG. 3 is a plan view of a two-shaft electric trolley according to the present invention, FIG. 4 is a side view of FIG. 3, and FIG. 6 is an enlarged sectional view taken along line A in FIG. 3, FIG. 6 is an enlarged sectional view taken along line A in FIG. 3, and FIG. 7 is a plan view showing the positional relationship of the wheelset along a curve. 1, 1'... wheel axle, 2, 2'... axle box body, 3,
3'... Spring device, 4... Bogie frame, 5... Pillow spring device, 7, 7'... Electric motor, 8, 8'... Horizontal beam,
9, 9'... Drive device, 13, 13'... Connection beam,
14, 14'... Vibration-proof rubber, 15, 15'... Pin, 16, 16'... Swing plate, 17... Link, 18... Attenuator.

Claims (1)

[Scope of Claims] 1. A bogie frame formed in a substantially H shape, wheel axles disposed at the front and rear of the bogie frame, and wheel axles installed at both ends of each wheel axle, with the bogie frame mounted on each axle. a spring device that elastically supports the bogie with low support rigidity in the longitudinal and lateral directions; a drive device installed on each wheel axle; a connecting beam that connects spring devices installed at both ends of each wheel axle, supports the drive device and the electric motor, and is held rotatably about a vertical axis on the bogie frame at a central position in the width direction of the bogie; a link that connects the connecting beams corresponding to the wheel axles at a point symmetrical position with respect to the center of the bogie; and a damper that connects the connecting beams corresponding to each wheel axle on one side in the width direction of the bogie to attenuate the relative displacement between the two. A two-shaft electric bogie for a railway vehicle, characterized by comprising: 2. A two-shaft electric bogie for a railway vehicle according to claim 1, in which a damper is installed between the front and rear connecting beams.