JP2008082720A - Testing device of railway vehicle axle bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a testing device of a railway vehicle axle bearing capable of evaluating precisely performance of the bearing used for an actual vehicle, even in the case of an axle box support system wherein an axial moment load is loaded on the bearing. <P>SOLUTION: A projection part 2a projecting orthogonally to the axial direction is provided in an axle box 2 storing a test bearing 1, and the projection part 2a is pressed in the axial direction by an axial load loading cylinder 15, and moment is added to the axial load to be loaded on the test bearing 1. Therefore, even in the case of the axle box support system wherein the axial moment load is loaded on the bearing, the performance of the bearing used for the actual vehicle can be evaluated precisely. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a railway vehicle axle bearing test apparatus.

  As a railway vehicle axle bearing test apparatus, a test bearing that supports a rotationally driven railway vehicle axle is housed in an axle box so that a radial load and an axial load are loaded (for example, Patent Document 1). reference).

  There are various types of axle box support methods for supporting the axle box containing the railcar axle bearings on the carriage, and the axle box is supported by a pair of axle springs arranged at the front and rear of the axle. The shaft box is moved up and down by a cylindrical guide type (Schlieren type) that guides the vertical movement of the axle box, a shaft spring disposed directly above the axle, and a shaft beam that is cantilevered by a carriage via a rubber bush. Many types of shafts that can be supported are used. Regardless of the axle box support system, radial and axial loads are applied to the bearing, but the axial load resulting from the thrust force acting on the axle box is a cylinder in which the axle box is indicated by a symmetrical structure before and after the axle. In the guide type, etc., a pure axial load with no moment is obtained, whereas in the case of a shaft beam type, etc., in which the axle box is indicated by an asymmetric structure before and after the axle, an axial moment with a moment is applied. It becomes a load.

JP 2004-219160 A

  Since the railcar axle bearing test apparatus described in Patent Document 1 applies a pure axial load to the test bearing, an axial moment load is applied to the bearing as in a shaft box support system such as a shaft beam type. However, there is a problem that the performance of a bearing used in an actual vehicle cannot be accurately evaluated because the test conditions are far from those in an actual vehicle.

  Accordingly, an object of the present invention is to provide a railway vehicle axle bearing test apparatus capable of accurately evaluating the performance of a bearing used in an actual vehicle, even if the axle box support method is used in which an axial moment load is applied to the bearing. It is.

  In order to solve the above problems, the present invention provides a test apparatus for a railway vehicle axle bearing in which a test bearing for supporting a rotationally driven railway vehicle axle is housed in an axle box, and a radial load and an axial load are loaded. A configuration was adopted in which means for applying a moment to the axial load applied to the test bearing was provided.

  In other words, by providing a means for applying a moment to the axial load applied to the test bearing housed in the axle box, the axle box support system in which the axial moment load is applied to the bearing is used in an actual vehicle. The performance of the bearing can be evaluated accurately.

  As a means for applying a moment to the axial load, a method of applying a moment by applying an axial load through the overhanging portion to the axial box and providing an overhanging portion that is perpendicular to the axial direction is adopted. Can do.

  Since the railcar axle bearing test apparatus according to the present invention is provided with means for applying a moment to the axial load applied to the test bearing housed in the axle box, the axle box support system in which the axial moment load is applied to the bearing. Even so, the performance of the bearing used in the actual vehicle can be accurately evaluated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, this railway vehicle axle bearing test apparatus has an axle 3 on which a axle box 2 in which a test bearing 1 is accommodated is supported on a base 11 by a support bearing 12, and a pulley. A radial load load cylinder 14 for applying a radial load is attached to a ceiling portion of a main frame 11a attached to the base 11 through a motor (not shown) through a main body 13. An axial load cylinder 15 for applying an axial load is attached to the sub-frame 11b attached to the side wall of the frame 11a. In this embodiment, the test bearing 1 is a pair of tapered roller bearings.

  The radial load loading cylinder 14 presses the axle box 2 from above via a spherical receiving member 16 so as to apply a radial load to the test bearing 1.

  Further, the axial load loading cylinder 15 presses an overhanging portion 2a provided in the axle box 2 at right angles to the axial direction so as to load the test bearing 1 with an axial moment load to which a moment is applied. Therefore, a shaft box support type to which an axial moment load such as a shaft beam type is applied can be accurately simulated.

  In addition, although illustration is omitted, when simulating a shaft box support type in which a pure axial load such as a cylindrical guide type is simulated, the attachment position of the sub frame 11b to the main frame 11a is changed, The axial center of the axial load load cylinder 15 can be matched with the axial center of the axle 3, and the outer peripheral part of the axle box 2 can be pressed via a separate pressing member.

  In the above-described embodiment, the axle is rotationally driven via a pulley. However, the axle may be rotationally driven directly by a motor or via a gear or the like. Further, although the test bearing is a tapered roller bearing, the test bearing may be another rolling bearing such as an angular ball bearing.

Notched longitudinal sectional view showing an embodiment of a railway vehicle bearing evaluation test apparatus Sectional view along the line II-II in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Test bearing 2 Shaft box 2a Overhang | projection part 3 Axle 11 Base 11a, 11b Frame 12 Support bearing 13 Pulley 14 Radial load load cylinder 15 Axial load load cylinder 16 Spherical receiving member

Claims (2)

  A test bearing that supports a rotationally driven railway vehicle axle is housed in the axle box, and a moment is applied to the axial load applied to the test bearing in a railway vehicle axle bearing test apparatus that applies a radial load and an axial load. An apparatus for testing a railcar axle bearing characterized by comprising means for carrying out the above.   2. The means for applying a moment to the axial load includes a projecting portion projecting perpendicularly to the axial direction of the axle box, and the moment is imparted by applying an axial load through the projecting portion. Equipment for testing railcar axle bearings as described in 1.

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