JPH08324427A - Axle box supporting device for rolling stock - Google Patents

Abstract

PURPOSE: To facilitate the fine adjustment of the axle distance and to improve the safety when a vehicle travels by splitting a shaft part into an axle box side and a truck frame fitting side, lapping the tip part of the axle part member on each side, tightening them by bolts, and adjusting freely the axle distance. CONSTITUTION: An axle member 4 is projected on the side closer to the center of a truck of an axle box 3 storing a bearing 2 to support each side of an axle 1. A cylindrical supporting part 6a of an axle member 6 on the truck side is fitted to a fitting seat 5a of a truck frame 5 through a shaft 14 and an elastic body 7. The axle member 4 and the truck side axle member 6 are provided so that their tip parts are lapped, and the lapped part forms a joined part, and the axle members on each side are tightened by piercing a plurality of tightening bolts 9 to be integrated. A friction member 8 may be interposed on the joined part, and the tightening function between the axle members on each side is further improved by the friction member 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an axle beam type axle box support device for a railway vehicle.

[0002]

2. Description of the Related Art An axle box containing bearings for supporting both ends of an axle of a bogie for a railroad vehicle is provided to hold forward and backward movements, to allow a lateral pressure to be relaxed in the left and right directions, and to be cushioned in the up and down directions. It is supported by an axle box support device that is designed to actuate the action. There are various types of axle box support devices such as an axle box guard system, an axial beam system, a leaf spring system, a link arm system, and a rubber system.

In the shaft-beam-type shaft box supporting device, a shaft beam integrated with the shaft box is connected to a side beam of a bogie frame by a horizontal pin joint, and a shaft spring is arranged in the middle of the shaft beam. Generally, the other end of the axle box is connected to the tip of the bogie frame by a link arm and a pin joint.

An improved axial beam type axle box support device (Japanese Patent Laid-Open No. 1-160777) has been proposed which improves the running stability and the ease of maintenance of the conventional type. In this example, a shaft spring 11 is provided in a shaft box portion of a shaft beam 10 which is integrated with a shaft box 12 which accommodates bearings 2 for supporting both ends of an axle shaft 1, and a cylindrical support portion 13 formed at the tip of the shaft beam 10. the through shaft 14 and the elastic body 7 in the mounting seat 5 _a of the bogie frame 5 consisting configuration coupled integrally.

As described above, according to the conventional shaft burr system, the function required for the axle box supporting device, that is, the so-called wheel axle and the bogie frame are fixed, and further the front and rear and right and left are kept at appropriate spring rigidity values, whereby the vehicle travels. Improves safety and stability.

[0006]

As described above, in the conventional axial beam method, a proper spring rigidity value is obtained in the bogie frame side mounting portion through the elastic body (rubber bush). On the other hand, the axle box side is formed integrally with the axle box and the beam. Since the axial distance accuracy between the front and rear wheel axles does not have an adjusting function, the accuracy cannot be adjusted. Therefore, there is a problem in that the axial distance cannot be adjusted when the elastic body becomes tired due to aging.

The present invention provides an axle box supporting apparatus which is improved so as to eliminate the drawbacks found in the conventional axle beam type axle box supporting apparatus and which can adjust the axial distance accuracy.

[0008]

[Means for Solving the Problems]

(1) A shaft beam type shaft box supporting device of the present invention is the shaft beam type shaft box supporting device, wherein the shaft beam portion is divided into two parts, a shaft frame side and a bogie frame mounting side, and tips of both side shaft beam members. The feature is that the parts are overlapped with each other and the bolts are pierced through to freely adjust the axial distance.

(2) In the axial-beam-type axle box supporting device described in (1) above, a friction plate is interposed between the overlapping joint surfaces of the front end portions of both-side axial beam members.

[0010]

The axle-beam type rail car axle box support device of the present invention comprises:
The shaft burr is divided into two parts, the shaft box side and the bogie frame mounting side.
Since the length of the axial beam can be finely adjusted, even if the axial distance becomes incorrect due to the fatigue of the elastic body due to long-term use, the fastening bolt can be loosened and corrected easily and accurately. . Further, by interposing a friction plate on the lap joint surface of the front end portions of the shaft burr members on both sides, it is possible to reduce the occurrence of deviation of the axial distance. A resin or the like can be used as the friction plate.

As described above, the structure is such that the axial distance accuracy, which is important for the performance of the bogie, can be adjusted. Axial beam with integrated box allows deformation without rattling, ensuring running stability.

[0012]

EXAMPLE An example of the present invention will be described with reference to FIGS. 1 (A) and 1 (B). A shaft baffle member 4 is provided on a side of the axle box 3 accommodating the bearings 2 supporting both ends of the axle 1 toward the center of the bogie.

Meanwhile, the cylindrical support part 6 _a of the carriage-side shaft Beams member 6 through a shaft 14 and the elastic body 7 in the mounting seat 5 _a of the bogie frame 5
Attach.

The shaft burr member 4 and the bogie side shaft burr member 6
Are provided so that their respective tip portions overlap with each other, and the overlapped portions form a joint portion, and the plurality of fastening bolts 9 are penetrated to fasten and integrate the both side shaft baffle members. Reference numeral 11 in the drawing is a shaft spring.

Incidentally, as shown in the figure, the joint portion can be fastened with a fastening bolt 9 with a friction material 8 interposed. The interposition of the friction material 8 further improves the fastening function between the shaft burr members on both sides.

[0016]

According to the present invention, fine adjustment of the axle distance can be performed easily and accurately by adopting a structure in which the axle beam is divided into the axle box side and the bogie frame side. As a result, the prescribed axial distance is always ensured and the safety of vehicle traveling is improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention, where (A) is a front view and (B) is a plan view of (A).

FIG. 2 is a front view showing an example of a conventional axle beam type axle box supporting device.

[Explanation of symbols]

1 axle 2 bearing 3 axle box 4 axle burr member 5 bogie frame 5 _a mounting seat 6 bogie side axle burr member 7 elastic body 8 friction material 9 fastening bolt 10 shaft burr 11 axle spring 12 axle box 13 cylindrical support portion 14 axis

Claims (2)

[Claims] 1. A shaft-beam-type shaft box supporting device, wherein the shaft beam portion is divided into two parts, a shaft box side and a bogie frame mounting side, and tip portions of both-side shaft beam members are fastened with overlapping bolts,
An axle box support device for a railway vehicle, which is characterized by freely adjusting the axle distance. 2. The axle box supporting device for a railway vehicle according to claim 1, wherein a friction material is interposed between the overlapping joining surfaces of the tip portions of the both-sided shaft burr members.