JP3473403B2 - Wheel position change mechanism for railway vehicles - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel position changing mechanism of a railway vehicle for enabling traveling between tracks having different gauges without changing a bogie. It is. 2. Description of the Related Art In a conventional bogie for a railway vehicle, a wheel axle in which one wheel is fitted to each end of one axle is used. Since the distance is fixed, it is not possible to travel on a track between different gauges without changing the bogie, for example, a conventional line and a Shinkansen. Therefore, when traveling by using a plurality of railways having different gauges, it is conventionally necessary to change trains, which is inconvenient and time-consuming. [0003] In order to solve the inconvenience of changing trains, a bogie replacement system in which bogies are exchanged at a point where a gauge changes, or a method in which wheels are mounted on an axle as proposed in Japanese Patent Application Laid-Open No. 6-92230, for example. In recent years, various types have been proposed which can travel on a track between different gauges without changing trains, such as a gauge-variable method in which a single bogie can travel on a track between different gauges by changing the position. [0004] However, in the former truck replacement method, since it takes a long time to replace the truck, it cannot be used except in places where the stop time is relatively long, such as a prefectural border, and is practical. is not. In addition, the latter gauge variable method,
For example, in Japanese Patent Application Laid-Open No. 6-92230, as shown in FIG. 3, a large hollow portion 1b is formed in a press-fit portion 1a of a wheel 2 of an axle 1 to reduce the thickness of the press-fit portion 1a. When a high pressure is applied between the inner periphery of the boss portion 2a and the outer periphery of the press-fit portion 1a from the flow path 2b provided in the boss portion 2a of the wheel 2, the press-fit portion 1a is easily bent toward the hollow portion 1b. The wheel 2 on the axle 1
The press-fit surface of the wheel seat portion is the portion of the axle 1 where the stress is the largest, and the end portion of the press-fit surface is a dangerous cross section where fretting corrosion and the like are likely to occur. Is practically not feasible. In addition, in the device proposed in Japanese Patent Application Laid-Open No. 6-92230, a jig for moving the wheel in the axial direction is additionally required. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and has a thinner press-fitted portion of an axle, which is a dangerous cross section at the end where stress is the largest and fretting corrosion or the like is likely to occur at its end. An object of the present invention is to provide a wheel position changing mechanism of a railway vehicle that does not require a jig or the like for moving the wheels in the axial direction. [0006] In order to achieve the above object, a wheel position changing mechanism for a railway vehicle according to the present invention comprises:
An axle and a wheel having a boss into which the axle is press-fitted;
Externally fitted to the axle on both sides of the boss
An outer sleeve sleeve fitted and fixed;
On the side, the axle, the boss, and the outer sleeve
And forming a hydraulic chamber surrounded by
Between the axle and the boss and outside of the hydraulic chamber
A flow path for guiding the liquid is formed . By doing so, the wheel position with respect to the axle can be changed without using a separate jig or the like. A wheel position changing mechanism for a railway vehicle according to the present invention has an axle and a boss into which the axle is press-fitted.
And the axle on each side of the boss.
And an outer cylinder sleeve fitted and fixed in an outer fitting shape.
On both sides of the boss portion, the axle, the boss portion, and the
To form a hydraulic chamber surrounded by the outer cylinder sleeve, before
The serial axle between the axle and the boss portion, and said hydraulic pressure chamber
It is obtained form the shape of the flow path for guiding the liquid from each outside. In the wheel position changing mechanism for a railway vehicle according to the present invention, a high pressure is applied between the axle and the boss portion by supplying a liquid from the outside through the flow path to loosen the tight fit, and then the one hydraulic chamber is released. When a high pressure is applied by supplying liquid to the wheel, the wheel moves to the other hydraulic chamber side. After the wheel has moved to the predetermined position,
If the liquid supplied between the axle and the boss is discharged to the outside, the wheel is fixed at the moved position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wheel position changing mechanism for a railway vehicle according to the present invention will be described below with reference to an embodiment shown in FIGS. FIG. 1 is a longitudinal sectional view showing a main part of a wheel position changing mechanism of a railway vehicle according to the present invention. FIG. 2 shows a case where a wheel is at a position in a standard track, and FIG. FIG. 3 is a diagram showing a main part of the mechanism in a longitudinal section, in which a wheel is at a position in a narrow orbit. 1 and 2, reference numeral 11 denotes an axle which is rotatably mounted on a bogie frame (not shown) via a bearing 12 and a pair of left and right wheels 13 is press-fitted on both sides of the axle 11. . The boss 13a of the wheel 13
Is formed longer in the axial direction than the boss portion of a general wheel. Reference numerals 14a and 14b denote boss portions 13a of the wheels 13.
On both sides of the outer cylinder sleeve 14a, a pair of outer cylinder sleeves which are fitted and fixed to the axle 11 in an outer fitting manner.
Hydraulic pressure chambers 15a and 15b are formed on both sides of the boss 13a by the inner periphery of 14b, the side wall of the boss 13a of the wheel 13 fitted into the outer sleeves 14a and 14b, and the outer periphery of the axle 11. A seal member 16 is provided on the inner peripheral surface of the outer cylinder sleeves 14a and 14b at the end on the wheel 13 side, so that liquid does not leak from the hydraulic chambers 15a and 15b. Reference numerals 11a to 11c denote flow passages formed in the axle 11, of which 11a is a wheel 13 from both ends.
Boss 13a, 11b is provided from both shaft ends to one hydraulic chamber 15a, and 11c is provided from both shaft ends to the other hydraulic chamber 15b. Reference numeral 17 denotes joints provided at, for example, both ends of the axle 11, and the above-described flow paths 11a to 11c are connected to an external valve 18 and a hydraulic pressure source 19 through the joint 17.
It is connected to. The valve 18 and the hydraulic pressure source 1
9 may be installed on either the ground side or the vehicle body side. The wheel position changing mechanism of the railway vehicle according to the present invention has the above-described configuration. Next, the position of the wheels 13 is set for the standard track running shown in FIG. 1 by using the wheel position changing mechanism. The wheel 1 is used for traveling on a narrow track shown in FIG.
The procedure for changing the position of No. 3 will be described. First, prior to changing the position of the wheels 13, the vehicle body including the bogie is jacked up in order to reduce the vehicle load applied to the wheels 13. Alternatively, the vehicle load applied to the wheels 13 is received by a sliding member, a rolling member, or the like between the carriage and the rail provided for load support by lowering the rail. Next, the valve 18 is controlled so that the boss 13a of the wheel 13 and the axle 1 from the hydraulic pressure source 19 via the flow path 11a.
A pressing force is applied to the fitting portion of No. 1. by this,
The interference in the fitting portion is eliminated, and the wheel 13 can move in the axial center direction of the axle 11. In this state, the valve 18 is controlled again to apply a pressing force from the hydraulic pressure source 19 to the hydraulic pressure chamber 15b via the flow path 11c to move each wheel 13 in the axial center direction of the axle 11. Let it. When a pressure is applied to the hydraulic chamber 15b, the liquid in the other hydraulic chamber 15a is discharged to a drain tank (not shown) via the flow path 11b. Finally, the boss 13a of the wheel 13 and the axle 1
The liquid supplied to the fitting portion 1 is discharged to a drain tank (not shown) via the flow path 11a. Thereby, the interference of the fitting portion between the boss portion 13a and the axle 11 is restored, and the wheel 13 is fixed at the moved position. In addition, from those set for the narrow orbit shown in FIG.
When the position of the wheel 13 is changed for the standard track shown in FIG. 1, only the flow path to be pressurized when the wheel 13 is moved differs from the above description. In this embodiment, the flow passages 11a to 11c are formed so as to extend from both ends of the axle 11 to the respective hydraulic chambers 15a, 15b and the fitting portion between the boss 13a of the wheel 13 and the axle 11. Although shown, the flow path may be formed so as to extend from one end of the axle 11 to the respective hydraulic chambers 15a and 15b and the fitting portion between the boss 13a of the wheel 13 and the axle 11. As described above, according to the wheel position changing mechanism for a railway vehicle according to the present invention, the outer cylinder sleeve is fitted to the axle on both sides of the boss portion of the wheel. Fixed together,
A liquid pressure chamber formed by an axle, a boss, and an outer sleeve, and a liquid introduced from the outside between the axle and the boss through a flow path formed in the axle without using a separate jig or the like. The position of the wheel relative to the axle can be changed. Therefore,
It is possible to travel on tracks between different gauges without changing trains. Further, in the wheel position changing mechanism for a railway vehicle according to the present invention, it is necessary to reduce the thickness of the wheel press-fitting portion of the axle, which is a dangerous cross section where fretting corrosion or the like is likely to occur at the end portion where stress is the largest. Because there is no, it is feasible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a main part of a wheel position changing mechanism of a railway vehicle according to the present invention, showing a case where wheels are at a position in a standard track. FIG. 2 is a longitudinal sectional view showing a main part of a wheel position changing mechanism of a railway vehicle according to the present invention, and is a diagram showing a case where wheels are at positions in a narrow track. FIG. 3 is a longitudinal sectional view showing a main part of a conventional wheel position changing mechanism of a railway vehicle. [Description of Signs] 11 Axle 11a Channel 11b Channel 11c Channel 13 Wheel 13a Boss 14a Outer sleeve 14b Outer sleeve 15a Hydraulic chamber 15b Hydraulic chamber

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-92230 (JP, A) JP-A-62-85701 (JP, A) JP-A-63-195061 (JP, A) JP-A-8-85 169338 (JP, A) JP-A-6-144224 (JP, A) JP-A-9-48346 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B61F 7/00 B60B 35 /Ten

Claims (1)

(57) [Claims] [Claim 1] An axle and a boss into which the axle is press-fitted.
Wheels and the axle on each side of the boss
An outer cylinder sleeve fitted and fixed in an outer fitting shape with respect to the outer sleeve,
On both sides of the boss, the axle, the boss, and the front
While forming a hydraulic chamber surrounded by the outer sleeve ,
The axle between the axle and the boss portion, and forming a flow path for guiding the liquid from each outside to the liquid chamber, and the axle
After loosening the tight fit by applying high pressure between the bosses,
After applying high pressure to one of the hydraulic chambers and moving the wheels,
A wheel position changing mechanism of the railway vehicle, wherein and this <br/> fixing the liquid was discharged to the outside wheel between the boss portion.