JPH11310127A - Car body supporting device for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a good insulating property to a vertical vibration and a high-frequency vibration, to suppress an excessive car body rolling in the curved line passing time, and to obtain a damping performance to a rolling vibration. SOLUTION: An object of this device is a car body supporting device for rolling stock to support a car body 11 by two air springs 6 provided at the left side and the right side on a carriage frame 12. At the center in the lateral direction between the car body 11 and the carriage frame 12, an air spring 1 for vertical rigidity regulation having the vertical rigidity of the characteristic to show a negative spring constant generating the spring force in the direction of displacement is arranged. The inner tube side of the air spring 1 is installed to a tractive link receiving seat 13 hung from the bottom surface of the car body, while its outer tube 5 side is installed to the carriage frame 12. The device is composed to maintain the air pressure of the air spring 1 at a set pressure or higher by a pressure regulating valve.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a vehicle body supporting device for a railway vehicle which supports a vehicle body with a pair of left and right air springs.

[0002]

2. Description of the Related Art Generally, a vehicle body supporting apparatus for a railway vehicle supports a vehicle body in a vertical direction and a rolling direction by a pair of left and right secondary springs. The vertical spring constant of this spring is preferably low in order to insulate the vertical vibration of the vehicle body due to the irregularity of the track, but is preferably somewhat high in order to suppress the rolling of the vehicle body due to centrifugal force when passing through a curve. Therefore, the upper and lower spring constants are determined by finding a compromise between the two.

[0003] In particular, when an air spring having a low spring constant is used, measures are taken to suppress the rolling of the vehicle body by increasing the mounting position of the air spring so as to approach the center of gravity of the vehicle body and widening the left-right distance. However, since this method has a structural limit, some body support devices include an anti-rolling device using a torsion bar between a vehicle body and a bogie.

FIG. 4 shows an example of a vehicle body supporting device to which the above-mentioned prior art anti-rolling device is attached. Truck frame 12
A pair of air springs 6 are provided on the left and right sides of the vehicle body 11 to support the vehicle body 11. Each of the air springs 6 is adjusted by a height adjustment valve 10 so as to have a height within a range set between the bogie and the vehicle body. Further, a throttle 7 provided between the air spring main body and an auxiliary air chamber 8 formed in the bogie frame has a damping effect on vertical vibration and rolling vibration. The anti-rolling device is provided with two sets of left and right link devices including upper and lower links 21 and horizontal links 22 at both ends of a torsion bar 20. In this device, rolling is suppressed by the torsional rigidity of the torsion bar 20.

[0005] In the vehicle body support device having the above-described structure, high frequency vibration from the bogie is easily transmitted through the link of the anti-rolling device, which may cause a problem in ride comfort. Further, when the bogie is separated from the vehicle body, there are many places to be cut off and the workability is poor.

There has been proposed a vehicle body supporting apparatus in which the workability of separating the bogie seen in the vehicle body supporting apparatus is improved (Japanese Patent Laid-Open No. Hei 4-3346). This body support device is shown in FIG.
As shown in (1), the vehicle body is supported by one air spring provided at the center of the bogie. When viewed from above, the structure includes a center pin 23 having an upper portion attached to the bottom surface of the vehicle body and extending downward, an air spring receiver 24, an air spring 25, a bogie frame 26, and a front and rear space between the air spring receiver 24 and the bogie frame 26. It consists of a traction link 27 constrained in the direction and a torsion bar 28 connected between the ends of the left and right traction links 27.

[0007] The improved vehicle body supporting device is provided with a center pin 23 and an air spring receiver 24 when the bogie is separated from the vehicle body.
Workability is good because it is separated between However, the only device that bears the rolling is the torsion bar 28, which can hardly be expected to attenuate the rolling vibration. Further, since the interval between the left and right ends of the torsion bar 28 is relatively narrow, the rolling suppression performance is considered to be inferior to the device shown in FIG.

[0008]

As described above, the conventional body support apparatus has a problem in ride comfort, and furthermore, the workability of separating the bogie is poor. Further, the improved body support device has good workability for separating the bogie, but has poor rolling suppression performance. Thus, the prior art has many problems.

The present invention solves the above-mentioned problems of the prior art, has good insulation against vertical vibration and high-frequency vibration, can suppress excessive rolling of a vehicle body when passing a curve, and has a damping performance against rolling vibration. Provided is a vehicle body support device for a vehicle.

[0010]

SUMMARY OF THE INVENTION The present invention is directed to a vehicle body supporting device for a railway vehicle in which a vehicle body is supported by two air springs provided on the left and right sides of a bogie. An air spring for adjusting the vertical rigidity having a vertical rigidity having a characteristic showing a negative spring constant in which a spring force is generated in a displacing direction is disposed at the center in the horizontal direction between the vehicle body and the bogie. The inner cylinder side of the air spring is attached to a traction link receiving seat hanging down from the vehicle body bottom face, and the outer cylinder side is attached to a bogie frame. The air pressure of the air spring is maintained at a set pressure by a pressure regulating valve. Further, in the above-mentioned vehicle body supporting device for a railway vehicle, the bellows is fixed to the inner cylinder side of the air spring, and has an air spring for adjusting the vertical rigidity that is simply in contact with the outer cylinder side.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a body 11 and a bogie frame 12 are supported by two air springs 6 provided on the left and right sides thereof. The height of the air spring 6 is adjusted by a height adjustment valve 10 provided opposite to the air spring 6 so as to be within a height range set between the vehicle body 11 and the bogie 12. The throttle 7 provided between the main body of the air spring 6 and the auxiliary air chamber 8 formed in the bogie frame 12 plays a role in damping vertical vibration and rolling vibration. The air spring 1 for adjusting the vertical rigidity at the center in the left-right direction of the bogie frame 12 is attached to the traction link receiving seat 13 whose inner cylinder side is suspended from the bottom surface of the vehicle body 11, and the outer cylinder side is attached to the bogie frame 12. The spring constants of the left and right air springs 6 for supporting the vehicle body are set higher than conventional air spring constants in consideration of rolling resistance. The vertical rigidity adjusting air spring 1 has a characteristic of exhibiting a negative spring constant in which a spring force is generated in a displacing direction. This air spring 1 for adjusting the vertical rigidity
Is installed at the center of the bogie, so there is no spring action on pure rolling of the vehicle body.

Here, the vertical spring constant of the body supporting air spring 6 is kv1, the vertical spring constant of the vertical rigidity adjusting air spring 1 is -kv2, and the interval between the left and right air springs is 2b. Then, the vertical spring constant per vehicle is 2kv1-kv
2. The rotation spring constant for rolling is 2b ² · kv
1, the vertical spring constant is low, and even if the rotational spring constant for rolling is increased, the vertical spring constant can be reduced by -kv2.

Next, the vertical rigidity adjusting air spring 1 will be described with reference to FIG. The characteristics of the air spring are mainly determined by the shapes of the bellows 2, the inner cylindrical rubbers 3a and 3b, and the outer cylindrical rubber 4. In order to obtain a negative spring constant, the inner cylindrical rubbers 3a and 3b and the outer cylindrical rubber 4 are formed to protrude toward the bellows at the center in the vertical direction, and the protrusion amount gradually decreases from the center toward the upper and lower ends. .

The upper and lower spring constant is determined by setting the effective diameter of the air spring to 2R.
e, when the inclination angle of the inner cylinder is α, the inclination angle of the outer cylinder is β, and the internal pressure (gauge pressure) of the air spring is Pg,

[0015]

(Equation 1)

Here,

[0017]

(Equation 2)

## EQU1 ##

From equation (1), it can be seen that the higher the internal pressure Pg, the greater the negative spring constant. Therefore, it is effective to set the supply air to a pressure as high as the lower limit of the air source reservoir pressure. .

The bellows 2 is fixed at two places on the inner cylinder side,
If the inner cylinder is not fixed on the side of the outer cylinder 5 and the internal pressure is released, the outer cylinder 5 comes into light contact with the outer cylinder rubber 4. As a result, when removing the bogie from the vehicle body, by a simple operation just to release the internal pressure of the air spring,
The vertical adjustment air spring 1 can be separated into a vehicle body side and a bogie side. Therefore, there is no need for the work of releasing the fastening parts when the bogie is cut off, as seen in the conventional anti-rolling device of FIG.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The air spring 1 for adjusting the vertical rigidity, which is located at the center in the left-right direction of the bogie 12, has the inner cylinder side attached to a traction link receiving seat 13 hanging down from the bottom of the vehicle body 11, and the outer cylinder side attached to the bogie frame 12. Therefore, the possible radial size of the air spring is limited to some extent. From these conditions, the spring constant of the air spring for adjusting the vertical rigidity is determined.

The effective diameter 2Re = 0.36 m of the air spring 1 for adjusting the vertical rigidity, the internal pressure used is 0.5 MPa slightly lower than the lower limit of the air reservoir, the inner rubber 3 and the outer rubber 4 are used.
Assuming that the inclination angle of α is α = β = 30 degrees, equation (1), equation (2)
From the equation, the upper and lower spring constants -kv2 = -326 kN / m.

Table 1 shows the spring constants of the vehicle body supporting device using the air spring for adjusting the vertical rigidity of the vertical spring constant according to the present invention and the conventional vehicle body supporting device having no anti-rolling device. The present invention is higher when the upper and lower spring constants of both body support devices are set to be the same and the rotational spring constants are compared. Therefore, according to the embodiment of the present invention, it is understood that the effect of suppressing the rolling of the vehicle body when passing through a curve is great. The interval between the left and right air springs was 2b = 1.9 m.

[0024]

[Table 1]

4 and 5 equipped with a conventional anti-rolling device can realize the same upper and lower spring constants and rotational spring constants as those of the present invention. However, as described above, the present invention is superior in high-frequency vibration insulation and rolling vibration damping.

Next, an embodiment of the air spring for adjusting the vertical rigidity of the present invention will be described with reference to FIG. The inside of the bellows 2 is cut open in an annular shape, the holding ring 9 is placed between the upper and lower ends, and the holding ring 9 is sandwiched between the upper and lower inner cylinder rubbers 3a and 3b,
Screwed into the traction link receiving seat 13 and the lower inner cylindrical rubber 3
The inner cylinder 14 fitted with b is rotated and tightened and fixed. Then, the outer peripheral side of the bellows 2 is simply brought into contact with the outer cylindrical rubber 4. The pipe 15 for supplying air passes through the inside of the traction link receiving seat 13 from the vehicle body and opens into the bellows 2 through a hole formed in the fixing ring 9.

FIG. 3 shows an example of an air pipe for supplying air to the air spring 1 for adjusting the vertical rigidity of the present invention. The pressure sent from the air source reservoir by the air pipe 16 is 0.6 to 0.1.
The compressed air of 8 MPa is reduced to 0.5 MPa by the pressure regulating valve 18 via the check valve 17. Then, the air is supplied to the vertical rigidity adjusting air spring 1 through the three-way cock 19. Since the air pressure is always constant, the air spring constant is constant.

[0028]

According to the present invention, the vertical spring constant of the vehicle body can be reduced while the rotational rigidity with respect to the rolling is kept high, the absorption of vertical vibration due to the irregularity of the track is improved, and the riding comfort is improved. improves. In addition, there is a damping property against rolling vibration, and excessive rolling of the vehicle body when passing through a curve can be suppressed.

Further, since the vehicle body and the bogie are not connected by a high-rigidity member such as a link mechanism, transmission of high-frequency vibration from the bogie can be insulated. Further, the work of separating the bogie from the vehicle body can be easily performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view showing one embodiment of a vertical rigidity adjusting air spring used in the vehicle body support device of the present invention.

FIG. 3 is an explanatory view showing an example of an air pipe of an air spring for adjusting the vertical rigidity used in the vehicle body support device of the present invention.

FIG. 4 is an explanatory diagram showing an example of a vehicle body support device having a conventional anti-rolling device.

FIG. 5 is an explanatory view showing another example of a vehicle body support device having a conventional anti-rolling device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air spring for vertical rigidity adjustment 2 Bellows 3 Inner cylinder rubber 3a Upper inner cylinder rubber 3b Lower inner cylinder rubber 4 Outer cylinder rubber 5 Outer cylinder 6 Air spring 7 Restrictor 8 Auxiliary air chamber 9 Holding ring 10 Height adjustment valve 11 Body 12 Bogie frame 13 Tow link receiving seat 14 Inner cylinder 15, 16 Air pipe 17 Check valve 18 Pressure regulator valve 19 Three-way cock 20 Torsion bar 21 Up / down link 22 Horizontal link 23 Center pin 24 Air spring receiver 25 Air spring 26 Bogie frame 27 Tow link 28 Torsion Bar

Claims (2)

[Claims] A railway vehicle body supporting device for supporting a vehicle body with two air springs provided on the left and right sides of the vehicle, for adjusting the vertical rigidity having a negative vertical rigidity at the center in the left-right direction between the vehicle body and the vehicle. A body support device for a railway vehicle, wherein an air spring is arranged, and the inner cylinder side of the air spring is attached to a traction link receiving seat hanging down from the vehicle body bottom surface, and the outer cylinder side is attached to a bogie frame. 2. The railcar body according to claim 1, wherein the bellows is fixed to the inner cylinder side of the air spring, and has an air spring for adjusting the vertical rigidity that is merely in contact with the outer cylinder side. Support device.