Patent Application
20160152249
This application claims priority to Russian Patent Application No. 2014148119, filed Dec. 1, 2014 and titled “Round Side Bearing.”
The present invention relates to the design parts of a railcar truck, more particularly, to the side bearers limiting reciprocal displacement of a truck and railcar under the frame.
Known railcar trucks consist of a carrying body with a bearing cup installed thereon by applying a springing element. The general concept is disclosed in U.S. Patent Application Publication No. 2004/0187726, filed Sep. 30, 2004 and titled “Ride Control Constant Contact Side Bearing Arrangement,” now U.S. Pat. No. 7,121,212.
Disadvantages of the conventional design is the non-availability of fixing members between the carrying body and the bearing cup resulting in displacement of the bearing cup out of the carrier body of the bearer during operation or maintenance of a railcar. This can impair the performance of maintenance operations.
Conventional railcar side bearings consist of a carrying body with a base and a guiding opening wherein a bearing cup is installed by applying a springing element to its guide outer wall. This known concept is disclosed in RU 2370388, filed Jan. 27, 2009 and titled “Side Bearing Pad of Railway Car Trolley” (prior art).
Disadvantages of this prior art being the closest analogous solution of the claimed design with respect to a set of essential features is the non-availability of fixing members between the carrying body and the bearing cup resulting in accidental displacement of the bearing cup out of the carrier body of the bearer during operation or maintenance of a railcar. This can impair the performance of maintenance operations.
Technical result of the claimed invention is increased reliability of a railcar truck side bearer and improved performance of maintenance operations.
According to one embodiment, a side bearer of the railcar truck includes a carrying body with a base and guide opening, where a bearing cup is mounted by applying a springing element to its guide outer wall. The guide outer wall includes a thrust collar located with an open-end clearance in a groove of the guide opening on the side of the carrying body having a thrust face to ensure interaction with the thrust collar of the cup and limiting movement of the cup inside the guide opening with respect to the carrying body. The total clearance between the lateral face of the guide opening and the guide outer wall of the bearing cup does not exceed the total open-end clearance between the outer face of the thrust collar and the inner surface of the groove of the guide opening in the carrying body. Indicator grooving is implemented on a working face of the guide cup, wherein the depth of the grooving can be equal to a wear limit of the cup working face. The indicator grooving is implemented on the outer lateral surface of the carrying body wall at a distance from the carrying body face equal to a vertical wear limit of the cup working face. A guide stop is implemented on the inner face of the bearing cup to ensure proper location of the springing element, wherein the springing element is connected to the bearing cup by means of the fasteners, adhesive bond or rubber compound vulcanizing. The springing element is implemented as one or more compression springs. The bearing cup and the carrying body are made of ductile bainitic iron, wherein the bearing cup, guide opening of the carrying body and the thrust collar of the bearing cup are cylindrical. The thrust collar of the bearing cup is implemented as two or more thrust sectors. The guide opening from the side of the carrying body base is closed with a supporting plate, fixed at the base of the carrying body, wherein the supporting plate is equipped with the guide inner stops for locating of the springing element. The height of the bearing cup does not exceed the height of the carrying body.
The bearer of a railcar body disclosed herein differs from the prior art by the fact that the guide outer wall includes the thrust collar having an open-end clearance in the groove of the guide opening on the side of the carrying body base with a thrust face to ensure interaction with the thrust collar of the cup and limiting of the movement of the cup inside the guide opening with respect to the carrying body. Additionally, the total clearance between lateral face of the guide opening and the guide outer wall of the bearing cup does not exceed total open-end clearance between the outer face of the thrust collar and the inner surface of the groove of the guide opening in the carrying body. Also, the indicator grooving is implemented on a working face of the guide cup, wherein the depth of the indicator grooving can be equal to the wear limit of the cup working face. The indicator grooving can also be included on the outer lateral surface of the carrying body wall at a distance from the carrying body face equal to vertical wear limit of the cup working face. The guide stop is implemented on the inner face of the bearing cup to properly locate the springing element, wherein the springing element is connected to the bearing cup by means of the fasteners, adhesive bond or rubber compound vulcanizing. The springing element can be implemented as one or more compression springs. The bearing cup and the carrying body can be made of ductile bainitic iron. The bearing cup, guide opening of the carrying body and the thrust collar of the bearing cup can be cylindrical. The thrust collar of the bearing cup can be implemented as two or more thrust sectors. The guide opening from the side of the carrying body base is closed with a supporting plate, fixed at the base of the carrying body.
Character of the invention is illustrated by means of drawings, where
A railcar truck side bearer includes carrying body 1 with a base 1.1 (
The railcar truck side bearer operates as follows, according to one embodiment.
By the action of springing elements 5, the cup working face 4.1 of the bearing cup 4 is pressed against the bearing surface of the car body side bracket 10. Upon movement along the railway, swaying motion of the car body is transferred to the cup working face 4.1 of the bearing cup 4 through the side bracket 10. Bearing cup 4 reciprocates inside the guiding opening 2 of the carrying body 1. In turn, the thrust collar 7 of the bearing 4 moves freely in the groove 8, and does not impede the reciprocating motion of the bearing cup 4 in the guiding opening 2. Should the load of the side bracket 10 be removed from cup working face 4.1 of the bearing cup 4 (e.g., upon a car repair, dismantling of a truck) the springing elements 5 expand, moving the bearing cup 4 along the guiding opening 2 until the thrust collar 7 touches the limiting face 9 of the groove 8, thus preventing displacement of the bearing cup 4 out of the body 1.
Due to the fact that total clearance between the lateral face of the guide opening 2 and the guide outer wall 3 of the bearing cup 4 does not exceed the total open-end clearance between the outer face of the thrust collar 7 and the inner surface of the groove 8, the lateral surface of the guiding opening 2 is the reference guiding surface for the outer wall 3 of the bearing cup 4. This can ensure a reliable skew-eliminating reciprocating spring-loaded motion of the bearing cup 4 inside the body 1.
Upon implementing the indicator grooving 4.2 on the cup working face 4.1 of the bearing cup 4 with depth, equaling to the wear limit of the cup working face 4.1, or upon implementing the indicator grooving 1.2 on the outer lateral surface of the carrying body wall 1 at the distance “h,” equaling to the vertical wear limit of the body 1, visual inspection of indicated surfaces and performance capacity of the side bearer is performed. When the amount of wear is equal to the depth of indicator grooving 4.2 or distance “h,” the bearing cup 4, carrying body 1 or the side bearer assembly should be changed.
Thus, the use of limiting elements in the design of a railcar truck side bearer presented by the thrust collar 7 on the guiding wall 3 of the bearing cup 4, as well as by the limiting face 9 in the grooving 8 of the guiding opening 2, ensures unreleasable connection of the carrying body 1 with the bearing cup 4 under different truck service conditions, which increases reliability of a truck side bearer and performance of maintenance operations.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2014148119 | Dec 2014 | RU | national |
