RU208359U1 - Freight carriage friday - Google Patents

Abstract

The utility model relates to railway rolling stock, in particular, to the design of a joint between a freight car frame and a bogie. The center plate contains a bearing and a thrust surface, a pivot hole, a flange with holes for screws, a mating surface. On its supporting surface, radial recesses are made, filled with lubricant, the recesses do not reach the thrust surface by the value A, which is from 5 to 15 mm, and the recesses begin with an offset B from the pivot hole, where B is from 5 to 15 mm. The recesses on the supporting surface are made of the same or different lengths, and their depth is not more than 6.5 mm. The utility model is aimed at increasing the durability of the center plate by reducing the wear of its bearing surface by ensuring that a sufficient amount of lubricant is always present between the contact surfaces of the center plate and the center plate in the recesses and there is no possibility of dirt getting between the rubbing surfaces. 3 w.p. f-ly, 3 ill.

Description

The utility model relates to railway rolling stock, in particular, to the design of the unit for connecting the frame of a freight car with a bogie.

The center plate is designed to transfer the load from the car body frame to the bolster (pivot or connecting) beam of the freight car running bogie and provides rotation of the bogie relative to the car in curved track sections. In this case, center plates can have flat or spherical bearing surfaces.

Known center plate of railway rolling stock (RU 2613113, publ. 03/15/2017), containing a support and stop surface, an opening for a kingpin, a mating surface, in which two opposite bevels are made along the edge of the support surface symmetrically relative to the longitudinal central axis of the center plate. The disadvantage of the known invention is the acceleration of wear of the bearing surface of the center plate and the contacting surface of the center plate due to the lack of lubrication between them.

Known center plate (RU 2389627, publ. 05/20/2010), containing the support and stop surfaces, on which the grooves are filled with lubricant, and on the support surface the grooves are located radially. The known technical solution was adopted as the closest analogue.

The disadvantage of the prototype is the low durability of the center plate and counter pad due to insufficient amount of lubricant in the friction zone when making grooves in the bearing surface of the center plate in the form of small rounded grooves, as well as an insufficient amount of lubricant in the friction zone when performing grooves in the form of radially diverging grooves due to its squeezing out through the recesses on the thrust surface and due to the ingress of dust and dirt into the friction zone when making recesses both on the supporting and on the thrust surfaces.

The technical result of the claimed utility model is to increase the durability of the center plate by reducing the wear of its supporting surface due to the constant presence of a sufficient amount of grease between the contacting surfaces of the center plate and the center plate in the grooves and the absence of the possibility of dirt getting between the rubbing surfaces.

The technical result is achieved by the fact that in the center plate of a railway freight car, which has a central pivot hole and contains a support and a stop surface, on the support surface of which radial recesses filled with lubricant are made, the recesses on the support surface do not reach the stop surface by the value A.

Additionally, the A value is between 5 and 15 mm.

In addition, the recesses begin with an offset B from the pivot hole, where B is 5 to 15 mm.

Moreover, the recesses on the support surface can be made of the same or different length.

Also, the depth of the grooves is no more than 6.5 mm.

The utility model is illustrated by drawings, which show:

FIG. 1 - friday, top view;

FIG. 2 - friday, isometric view.

FIG. 3 - an embodiment of the grooves on the center plate, top view.

The center plate of a freight car contains a round supporting surface 1 and a thrust surface 2, which is perpendicular to the supporting surface 1. The supporting surface 1 is designed to transfer vertical forces from the weight of the car to the bogie, as well as to transfer vertical forces from the interaction of the running parts of the bogie with the rails to the car body during its operation. The thrust surface 2 is designed to transfer horizontal forces from the car body to the bogie, as well as to transfer horizontal forces from the interaction of the bogie running parts with the rails to the body during the operation of the freight car. In addition, the center plate contains a mating surface (not shown in the figures) located on the opposite side from the supporting surface 1 and in contact with the supporting surface of the car frame. In the center 3 of the support surface 1, there is a pivot hole 4, passing through the center plate perpendicular to its support surface 1, intended for centering the car body on the bogie using a king pin (not shown) and providing for the possibility of turning the bogie relative to the body in a horizontal plane and vertical movement of the body relative to the center plate bogie bolster. On the support surface 1, radial recesses 5 are made, diverging rays in the direction from the center 3 of the support surface 1 towards the stop surface 2. The length of the recesses 5 is chosen so that they do not reach the stop surface 2 by an amount A, which can be from 5 to 15 mm. In addition, the recesses 5 may not start from the pivot hole 4, but retreat from it by an amount B, which also ranges from 5 to 15 mm.

The recesses 5 are filled with a lubricant, which can be a solid or plastic antifriction material.

Radial grooves 5 retain antifriction material on the surface of the center plate and thereby create a sufficient supply of it for the entire period of operation of the center plate, and the number of radial grooves 5 is selected depending on the hardness of the lubricant used. For example, the figures show eight radial grooves 5, but their number can be increased to twelve (not shown).

In addition, the recesses 5 on the support surface 1 of the center plate can be made of the same or different lengths, and the alternate execution of a longer recess after a short one is not necessary. FIG. 3 shows a variant of the alternate execution of the recesses 5 of greater and lesser length.

The angles between the grooves, as a rule, are taken to be the same, however, based on the operating conditions and the type of carriage, they can be taken different from 25 ° to 50 °.

The depth of the recesses in the preferred embodiment of the center plate is at most 6.5 mm. This depth allows you to create a stock of lubricant in the grooves for the entire period of operation of the center plate, the abrasion of the bearing part 1 of which cannot exceed 6 mm according to the regulatory documentation.

To fix the center plate on the car frame, flange 6 with holes 7 is most often used, through which the center plate is rigidly attached to the car frame using rivets or bolts (not shown).

The support surface 1 of the center plate is lowered onto the counter surface of the center plate (not shown) and abuts against the counter surface 2 of the center plate. During the operation of the car, the center plate and the center plate rotate relative to each other on the pivot within the range of rotation of the car bogie in the curved sections of the track. Due to the large loads on the bearing surface 1 of the center plate, a large friction force arises between them on the counter surface of the center plate and, as a result, a large wear of both surfaces. To avoid this, in the presented application on the bearing surface 1 of the center plate, elongated radial recesses 5 are made, filled with a lubricant. As the bearing surface of the center plate rotates along the counter surface of the center plate, the lubricant is delivered to the point of contact between them and helps to reduce abrasion of the bearing surface 1 of the center plate, as well as the counter surface of the center plate.

To prevent the lubricant from squeezing out of the recesses 5 and getting dirt and dust between the rubbing surfaces, the recesses 5 do not reach the thrust surface 2 by a value of A, which is 5-15 mm. Also, for this, the recesses 5 can begin not from the pivot hole 4, but retreat from it by an amount B from 5 to 15 mm. The minimum value of the A and B values was selected from the calculation of the minimum allowable clearance before the start of the recess 5, which prevents dirt from getting inside the recess 5. The maximum value of the A and B values was selected from the calculation of preventing the length of recesses 5 from decreasing to such a size when the amount of lubricant becomes insufficient for the entire the period of operation of the center plate.

The presence of radial grooves on the support surface of the center plate allows creating a sufficient supply of antifriction material between the rubbing surfaces in the center plate-center plate contact unit, which leads to an increase in the durability of the center plate and additionally to an increase in the durability of the center plate.

Claims (4)

1. The center plate of a freight car, having a central pivot hole, containing a bearing and a thrust surface, on the bearing surface of which radial recesses are made, filled with lubricant, characterized in that the recesses do not reach the thrust surface by an amount A and begin with an offset B from the pivot hole ... 2. A center plate according to claim 1, characterized in that the values of A and B are from 5 mm to 15 mm. 3. A center plate according to claim 1, characterized in that the recesses on the supporting surface are made of the same or different lengths. 4. The center plate according to claim 1, characterized in that the depth of the recesses is not more than 6.5 mm.

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