JP2002104182A - Height detector and truck for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a digital angle sensor, which cannot meet needs such as miniaturizing of an apparatus and reduction in burden of maintenance, when used. SOLUTION: An arm 71, which is mounted on a vehicle body and jointed to a rotating shaft 74 opening and closing an automatic height adjusting valve 73 so that they may rotate together, oscillates vertically in accordance with the height of a pneumatic spring to turn the rotating shaft 74. An analog angle sensor 70 detecting a rotational angle is provided coaxially to the rotating shaft 74 to detect the height of the pneumatic spring from the detected rotational angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height detecting device for detecting the height of an air spring of a bogie for a railway vehicle and a bogie for a railway vehicle, and more particularly to an analog type coaxial with a rotating shaft of an automatic height adjusting mechanism. The present invention relates to a height detection device combined with an angle sensor and a bogie for a railway vehicle.

[0002]

2. Description of the Related Art When a railway vehicle that travels on a curved road does not travel at a speed that is commensurate with the amount of cant, a lateral acceleration acts on passengers, resulting in poor ride comfort. In recent years, in order to offset the lateral acceleration, a device has been proposed in which a vehicle body is inclined inward of a curve in a curved section using an air spring interposed between the bogie and the vehicle body.

In such a device, when the vehicle body is inclined, it is necessary to detect the height of the air spring. JP-A-11-78875 and JP-A-11-78876
Japanese Patent Application Laid-Open Publication No. H11-157210 discloses a height detection device that detects the height of an air spring.

A height detecting device disclosed in Japanese Patent Application Laid-Open No. H11-78875 detects a rotation angle of an operation lever of an automatic height adjustment valve using a digital angle sensor such as an absolute encoder. , Height. Further, a digital angle sensor disclosed in Japanese Patent Application Laid-Open No. 11-78875 is provided with a toothed tooth that meshes with an eccentric cam that is connected to the shaft so as to rotate integrally with the shaft for operating an automatic height adjustment valve. The power is transmitted to a vehicle height measuring encoder via a belt. On the other hand, the angle sensor in the vehicle height measuring device disclosed in Japanese Patent Application Laid-Open No. 11-78876 is provided coaxially with an adjustment rod connecting the horizontal lever and the vertical lever.

[0005]

However, since the angle sensor disclosed in Japanese Patent Application Laid-Open No. H11-78876 is provided at the connection between the horizontal lever and the vertical lever, the angle sensor detects the vertical vibration acceleration transmitted from the bogie. There is a problem that the influence is large. That is, since the vertical vibration at the connecting portion is a relative vertical vibration between the bogie and the vehicle body, it has an adverse effect on the angle sensor, resulting in a decrease in the reliability and durability of the angle sensor.

The angle sensor disclosed in Japanese Patent Application Laid-Open No. H11-78875 is different from the angle sensor disclosed in Japanese Patent Application Laid-Open No. H11-78876 in that an angle sensor is provided on the automatic height adjustment valve side, that is, on the vehicle body side. Therefore, the above-described problem can be avoided. However, even when the height of the vehicle changes and the shaft for operating the automatic height adjustment valve is turned, the turning is performed from the shaft to a cam connected to the shaft so as to be integrally rotatable with the cam. To the toothed pulley which meshes with the toothed pulley, from the toothed belt to the toothed pulley which meshes with the toothed belt, and so on. For this reason, there is a problem that the number of parts is increased, and there is also a problem that the size of the device is increased due to the increase in the number of parts.

Further, when a digital angle sensor is used, if the amount of information increases, the number of wires required increases, and it is possible to meet the demand for downsizing of the height detecting device and, consequently, the downsizing of the bogie for railway vehicles. There was a problem that it was not possible. In particular,
Japanese Patent Application Laid-Open No. H11-78876 has a problem that the configuration is extremely complicated and the device becomes large.

Further, the absolute encoder forms slits having various patterns on concentric circles on the reflection surface, and arranges a light emitting diode, a phototransistor and an index scale for each slit to detect an absolute position of a rotation angle. Is what you do. However, railway vehicles
When the absolute encoder is used as an angle sensor because it is used outdoors, there is also a problem that dust, oil, and the like adhere to the reflection surface, resulting in a decrease in detection accuracy. further,
Since the angle is detected by using the light emitting diode, the light emitting diode is consumed with the passage of time, so that the light emitting diode needs to be replaced frequently, and there is a problem in maintenance. That is, it is not necessary to increase the accuracy of the height of the air spring so much. Therefore, it has been desired to develop a height detector capable of reducing the size of the device and reducing the maintenance burden, rather than the accuracy.

The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the maintenance burden by improving the durability and reliability by reducing the size of the device configuration. It is an object of the present invention to provide a height detecting device and a bogie for a railway vehicle which can be used.

[0010]

According to a first aspect of the present invention, there is provided a height detecting device for a railroad vehicle having a vehicle body mounted on a bogie via an air spring, the supporting column standing on the bogie. An arm is pivotally supported so as to be swingable, and a swing portion of the arm is integrally and rotatably connected to a rotation shaft provided on the vehicle body, and the air spring is rotated by the rotation of the rotation shaft. A height detecting device that opens and closes an automatic height adjusting valve that supplies and discharges pressurized air with respect to a rotary shaft, comprising an angle sensor that is provided coaxially with the rotating shaft and detects a rotating angle of the rotating shaft. It is characterized by the following.

According to the first aspect of the present invention, the pivot of the arm is connected to the supporting column erected on the bogie, and the swinging portion at the other end of the arm is rotatable integrally with a rotating shaft provided on the vehicle body. It is connected to. The arm swings up and down in accordance with the height of the air spring, and rotates a rotation shaft that is integrally rotatably connected to the swing portion. An angle sensor for detecting the rotation angle of the rotation axis is provided on the same axis as the rotation axis, and the height of the air spring is detected from the detected rotation angle. can do.

A height detecting device according to a second invention is characterized in that, in the first invention, the angle sensor is an analog angle sensor.

In the second invention, as the angle sensor,
Since the height is detected using an analog angle sensor instead of a digital one, it is possible to further reduce the size of the device configuration and to reduce the maintenance burden by improving the durability and reliability. It becomes possible.

According to a third aspect of the present invention, there is provided a railcar bogie including the height detecting device according to the first or second aspect.

According to the third aspect of the present invention, a railcar bogie provided with the above-described height detecting device is provided, so that the railcar bogie can be further reduced in size.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 1 is a schematic perspective view showing a main part of a bogie 1 for a railway vehicle. In the figure, reference numeral 10 denotes a front bogie of a railway vehicle, and 11 denotes a rear bogie. The front bogie 10 has air springs 8a and 8b, and the rear bogie 11 has air springs 8c and 8d. Air springs 8a to 8
An air supply valve 3 and an exhaust valve 4 that increase or decrease the amount of air in the air spring 8 according to an instruction from the control unit 5 are provided in d (hereinafter, referred to as an air spring 8).

When the air spring 8 is to be raised, an electromagnetic valve (not shown) in the air supply valve 3 is opened, and the air in the original air reservoir 6 is sent into the air spring 8 through the air line 2. On the other hand, when lowering the height of the air spring 8, the solenoid valve (not shown) in the exhaust valve 4 is opened to discharge the air in the air spring 8 to the atmosphere.

Reference numeral 7 denotes a height detecting device according to the present invention, which comprises a support column 72, an arm 71, an automatic height adjusting valve 73, an analog angle sensor 70 (see FIG. 3), and the like. That is, the height of the vehicle body D with respect to the front bogie 10 or the rear bogie 11 is detected, and when the vehicle body D is inclined, the height of the air spring 8 is mechanically adjusted.

FIG. 2 is a schematic diagram showing a cross section of the bogie 1 for a railway vehicle. One end of the support pillar 72 is erected from the upper surface of the front bogie 10 in the vehicle body D direction, and the support pillar 72 stands on the front bogie 10.
The other end is pivotally connected to a pivot 71b of the arm 71.

FIG. 3 is a schematic perspective view showing a height detecting device 7 according to the present invention, FIG. 4 is a cross-sectional view of the height detecting device 7 according to the present invention, and FIG. 5 is a height detecting device according to the present invention. FIG. 6 is an exploded perspective view showing a mounting structure of the height detector 7, and FIG. 6 is a front view of the height detector 7 according to the present invention. One end of the rotating shaft 74 fitted into the approximate center of the automatic height adjustment valve 73 has an appropriate length projecting from the casing of the automatic height adjustment valve 73. The moving part 71 a is integrally rotatably connected to the moving part 71 a, and the turning shaft 74 also turns according to the swing of the arm 71.
The automatic height adjustment valve 73 is configured to open and close by this rotation.

The other end of the rotating shaft 74 also protrudes from the casing of the automatic height adjusting valve 73 with an appropriate length, and the protruding portion includes an analog case composed of a magnet case 76, a potentiometer 77 and a cable 77a. Type angle sensor 7
0 is provided coaxially with the rotation shaft 74. The projecting portion of the rotating shaft 74 is inserted into a concentric magnet case 76 and screwed together with the magnet case 76 by a screw 75 so as to be integrally rotatable. On the other hand, a detection shaft 77b of a potentiometer 77 having a diameter smaller than the diameter of the magnet case 76 is inserted into the other end of the magnet case 76 in a non-contact state with the magnet case 76. The potentiometer 77 is fixed by appropriate means, and the detected voltage is output to the control unit 5 via the cable 77a.

When the arm 71 rotates above the horizontal position, the rotation shaft 74 rotates and the automatic height adjustment valve 73 supplies pressurized air to the air spring 8, and conversely, when the arm 71 rotates above the horizontal position. When rotated downward, the rotation shaft 74 rotates and the automatic height adjustment valve 73 switches to a state in which the compressed air of the air spring 8 is discharged. The potentiometer 77 is a magnet case 76
And outputs a voltage proportional to the rotation angle of the control unit 5 to the control unit 5.
Converts the output voltage to the height of the air spring 8 with reference to a conversion table stored in a RAM (not shown). The height of the air spring 8 can be calculated by multiplying the rotation angle of the magnet case 76 by the length of the arm 71 in the longitudinal direction.

In this embodiment, the analog type angle sensor 70 is provided at a position facing the arm 71 via the automatic height adjustment valve 73. However, the present invention is not limited to this.
The analog angle sensor 70 may be provided on the arm 71 side. Further, in this embodiment, the magnetic potentiometer is used, but the invention is not limited to this, and another analog angle sensor such as a resolver may be used.

[0024]

As described in detail above, in the first invention,
A pivot portion of the arm is connected to a support column erected on the bogie, and a swing portion at the other end of the arm is connected to a rotation shaft provided on the vehicle body so as to be integrally rotatable. The arm swings up and down in accordance with the height of the air spring, and rotates a rotation shaft that is integrally rotatably connected to the swing portion. An analog angle sensor for detecting the rotation angle of the rotation shaft is provided coaxially with the rotation shaft, and the height of the air spring is detected from the detected rotation angle. Can be reduced in size, and maintenance burden can be reduced by improving durability and reliability.

In the second invention, as the angle sensor,
Since the height is detected using an analog angle sensor instead of a digital one, it is possible to further reduce the size of the device configuration, and to reduce the maintenance burden by improving the durability and reliability. It becomes possible.

According to the third aspect of the present invention, there is provided a railcar bogie provided with the above-described height detecting device, so that the railcar bogie can be further downsized. Can provide excellent effects.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a main part of a bogie for a railway vehicle.

FIG. 2 is a schematic view showing a cross section of a bogie for a railway vehicle.

FIG. 3 is a schematic perspective view showing a height detecting device according to the present invention.

FIG. 4 is a cross-sectional view of the height detecting device according to the present invention.

FIG. 5 is an exploded perspective view showing a mounting structure of the height detecting device according to the present invention.

FIG. 6 is a front view of the height detecting device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rail car bogie 2 Air duct 3 Air supply valve 7 Height detecting device 10 Front bogie 11 Rear bogie 70 Analog angle sensor 71 Arm 71a Swing part 72 Support column 73 Automatic height adjusting valve 74 Rotating shaft 8a 8b, 8c, 8d Air spring

Claims (3)

[Claims] An arm is pivotally supported by a supporting column of a railroad vehicle having a body mounted on a bogie via an air spring, the arm being swingably supported by the bogie, and the arm is pivotally supported. An automatically height-adjusting valve for supplying and discharging pressurized air to and from the air spring by pivoting the pivoting portion so as to be integrally rotatable with a pivot shaft provided on the vehicle body; A height detecting device that is provided coaxially with the rotating shaft and includes an angle sensor that detects a rotating angle of the rotating shaft. 2. The height detecting device according to claim 1, wherein the angle sensor is an analog angle sensor. 3. A bogie for a railway vehicle, comprising the height detecting device according to claim 1.