RU162774U1 - SPRING FOR SPRING SUSPENSION - Google Patents

Abstract

The inventive utility model relates to railway transport, for spring suspension of biaxial bogies of freight cars, in particular a spring set and springs included therein.

Spring for spring suspension, inner low, twisted cylindrical, with working and supporting coils, having the number of working coils 4.5-5.4, made of a spring steel grade, while its index, defined as the ratio of the average diameter of the coil to the diameter of the bar springs is 4.750-5.750.

The inventive design of the inner spring allows you to design a spring with geometric characteristics that provide the necessary value of the calculated static deflection of the spring suspension of a biaxial bogie of a freight car. 1 n.p.ph., 1 s.p.ph., 1 ill.

Description

The inventive utility model relates to railway transport, for spring suspension of biaxial bogies of freight cars, in particular a spring set and springs included therein.

A known construction of a freight wagon trolley (Utility Model Certificate RU 16482, B61F 5/00 of 01/10/2001), comprising a frame based on axle boxes of wheel pairs, including sidewalls connected by a nadresornoy beam. The nadressornoj beam is mounted on double-row springs, and connected to the side frame using friction wedges, also supported by double-row springs. Double-row springs under the nadressornoj beam, consist of external and internal springs, while one spring has a greater height in the free state than the other. Under the friction wedges, double-row springs with the same height of the outer and inner springs are installed, and their height is equal to the height of the larger of the springs installed under the spring bar.

This design covers a large number of spring suspension versions of biaxial bogies of freight cars, which can be conditionally divided into three groups. The first group of designs will never be able to ensure the health of the node. The second group of designs can ensure the operability of the unit, but they will not satisfy the requirements of regulatory documents. The third group of designs can ensure the operability of the unit and can satisfy the requirements of regulatory documents, but it is not possible to determine this many useful options. The disadvantage of this design is the fact that it does not fully comply with the requirements of the newly issued GOST 9246-2013 “Biaxial three-element carts for freight cars of 1520 mm gauge railways. General specifications. "

A device is also known - a spring kit for suspending a bogie of a freight railway car (Utility Model Patent RU 101986, B61F 5/06 of 10/27/2010), consisting of nine symmetrically arranged two-row, coil, coil springs, two of which are equipped with friction wedges, and seven are located under the nadressornoj beam. The spring set has internal springs under the friction wedges, external springs under the friction wedges, internal springs under the spring bar, external springs under the spring bar, made in decreasing order of height.

This design is selected as a prototype for the claimed utility model.

Significant disadvantages of this design are the presence of nine double-row springs, while the spring set has four different springs, which vary in height in the free state, the diameter of the rods and the working number of turns. This construction design increases the range of parts of the spring kit, which in turn increases the cost of the spring kit in the new product and leads to an increase in the cost of repairing the unit in operation. Also, four different sizes of springs in the spring kit increase the complexity of assembling biaxial bogies of freight cars, primarily associated with the selection of kit springs in height.

The problem to which the claimed utility model is directed is to create an internal low, installed in the spring suspension under the spring bar, springs with geometric characteristics that will allow, together with the corresponding external high and internal high springs, to create a spring suspension of a biaxial truck of a freight car providing design static deflection and meeting the requirements of the newly issued GOST 9246-2013 “Biaxial three-element carts of freight cars railways gauge 1520 mm. General technical conditions ”in combination with an increase in the level of interchangeability and maintainability, with a decrease in the cost and complexity of manufacturing and repair in operation of spring suspension.

The problem is solved in such a way that the inner spring is low, installed under the sprung beam is made with the index (C _{V. b} ), defined as the ratio of the average diameter of the coil (D _{V. b} ) to the diameter of the rod (d _{V. b} ) of the spring, amounting to 4.750 -5.750. At the same time, each of the inner low springs of spring suspension is made of steel having a yield strength σ _{t of} at least 1470 MPa.

The essence of the proposed design is that the spring for spring suspension, internal low, twisted cylindrical, with working and supporting coils, having the number of working coils 4,5-5,4, made of a spring steel grade, while its index, defined as the ratio of the average diameter of the coil to the diameter of the spring rod is 4.750-5.750.

In addition, the spring suspension biaxial bogie wagon, each of the inner springs low spring set made of a steel having a yield strength σ _m of at least 1470 MPa.

The essence of the claimed utility model is illustrated in the drawing:

FIG. 1 - internal low spring.

Spring for spring suspension, internal low, twisted cylindrical with working 1 and supporting 2 turns, having the number of working turns 4,5-5,4, made of a spring grade of steel, while its index (C _B.b ), defined as the ratio the average diameter of the coil (D _{V. B.} ), to the diameter of the bar (d _{V. B.} ) of the spring is 4.750-5.750.

In the spring suspension of a biaxial truck of a freight car, each of the internal low springs of the spring set is made of steel having a yield strength σ _{t of} at least 1470 MPa.

The technical result of the claimed utility model is that the geometrical characteristics of the inner low spring installed under the nadressornoy beam with an index of 4.750-5.750 are selected, which allow you to create, complete with the corresponding external high and internal high springs, the design of spring suspension of a biaxial truck a wagon ensuring compliance with the requirements of the newly issued GOST 9246-2013 “Biaxial three-element carts of freight cars of 1520 mm gauge railways. General technical conditions ”and allow to ensure the specified movement of the compressed part of the railway carriage in the empty and loaded state, combined with an increase in the level of interchangeability and maintainability, with a decrease in the cost and complexity of manufacturing and repair in operation of spring suspension.

The implementation of the internal low spring of steel having a yield strength σ _{t of} at least 1470 MPa, allows to ensure the strength properties of the spring set and increase the designated life of each spring.

Currently, the claimed utility model has developed design documentation and comprehensive testing of prototypes is underway.

Claims (2)

1. Spring for spring suspension, inner, twisted cylindrical, with working and supporting coils, having a number of working coils of 4.5-5.4, characterized in that its index, defined as the ratio of the average diameter of the coil to the diameter of the spring rod, is 4.750 -5.750. 2. A spring for spring suspension according to claim 1, characterized in that it is made of steel having a yield strength σ _{t of} at least 1470 MPa.

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