RU2248286C2 - Freight car running bogie - Google Patents

Abstract

FIELD: railway transport.

SUBSTANCE: proposed freight car running bogie contains frame consisting of two longitudinal and one cross carrying beams, and pivot bearing unit. Frame rests on wheelsets and axle boxes through spring box suspension with rubber-metal resilient members installed at both sides of axle box. Ends of longitudinal beams of frame are interconnected by tie-rods and are provided with box brackets arranged at both sides of axle boxes and containing two-layer rubber-metal resilient members of different rigidity engaging with axle box housing through vertical guides. Each guide is furnished with antifriction cover plate and vertical guide projection found inside vertical slot of housing of rubber-metal member. Side bearers are installed on frame cross beam. Side bearers are made in form of spring-loaded box members enclosing housing with resilient members. Pivot bearing unit with spherical bearing is arranged in middle part of cross beam. Spherical bearing accommodates spherical insert with antifriction fabric on working surface. Insert engages with spherical surface of adapter secured between car pivot bearing unit and bogie bearing by means of pivot.

EFFECT: improved damping characteristics of suspension.

4 cl, 8 dwg

Description

The invention relates to rolling stock of railway transport, in particular freight.

Famous domestic truck model 18-100 for railway freight transport, developed by the Central Research Institute-KhZ in 1959. Its disadvantages are in increased mass at a relatively low operating speed [1, p. 2].

Known carts with a rigid frame, for example, U25 and its modifications, manufactured by Gloucester, UK. [2, p. 6]. It consists of an H-shaped rigid frame with a single-stage axle box suspension of wheel pairs with coil springs of different heights.

The trolley has satisfactory performance for a certain type of load and speed, but it has an outdated design to achieve higher performance, in particular insufficient longitudinal allowable force.

Known freight cart patent No. 9002118, France, 1990 [2]. The trolley contains a frame with spring axle box suspension of wheelsets. Moreover, the springs are made coaxial, inserted one into another with different adjustable stiffness in the vertical direction. In the longitudinal direction, the forces are perceived by the rigid frame directly from the axle box.

A known design of a freight trolley [3], comprising a rigid frame of longitudinal and transverse load-bearing beams, axle box suspension of wheel pairs with rubber-metal elastic elements mounted on both sides of the axle box.

The design disadvantage is that the above-mentioned rubber-metal elements, in addition to the horizontal, are also loaded with a vertical load, which leads to premature wear.

However, despite its shortcomings, the latter design can serve as a prototype of the proposed.

The problem solved by the proposed design is to increase the allowable longitudinal forces, improve the damping properties of the suspension.

To solve this problem, a railroad freight car trolley containing a frame consisting of two longitudinal and one transverse load-bearing beams, axle box axle suspension of rubber pairs with rubber-metal elastic elements mounted on both sides of the axle box, a pyatnik assembly, is characterized in that the longitudinal beams of the frame the ends are interconnected by means of additional rods and equipped with vertical box brackets located on both sides of the axle boxes and containing two-layer rubber-metal elastic elements, the stiffness of one rubber layer being greater than the other, the axle boxes interacting with the casing through vertical guides, each of which is equipped with an anti-friction lining and a vertical guide protrusion located inside the vertical groove of the rubber-metal element casing, mounted on the transverse beam of the frame, made in the form of spring-loaded box-shaped platforms covering the body with elastic elements, and in the middle of the transverse beam there is a pyatnik node with a spherical Kim glide inside which is placed a spherical liner with coated on its working surface antifriction fabric material, which interacts with a spherical adapter fastened between the carriage and Pyatnikov trolleys glide through pin. The antifriction pad is made of cermet and equipped with a device for selecting gaps, for example, in the form of a wedge mechanism.

In Fig.1 shows a General view of the cart in a perspective view, in Fig.2, 3 and 4 - its projection. Figures 5 and 6 show the axle box suspension device, Fig. 7 shows the design of the firing unit, and Fig. 8 shows the side members.

The cart consists of a frame 1 formed by two longitudinal and one transverse load-bearing beams 2 and 3, respectively. The ends of the longitudinal beams 2 are interconnected by additional beams 4. The longitudinal beams are equipped with vertical box-shaped brackets 5 located on both sides of the axleboxes 6. Inside the brackets 5 rubber-elastic elements are placed 7. The axle box body 6 is provided with vertical guides 8 with a protrusion 10, each of which is provided anti-friction lining 9 made of cermet. The protrusion moves inside the vertical groove of the casing of the rubber-metal element 7. The cover 9 is equipped with a mechanism for selecting gaps in the form of a wedge 20. On the transverse beam 3 there are mounted side clips 11 made in the form of spring-loaded platforms 12 of a box-shaped shape, covering the housing 13 with elastic elements 25, and in the middle part of the transverse beam 3 there is a Friday assembly 14 with a spherical thrust bearing 15 inside with anti-friction fabric material 16 applied to its working surface, interacting with the spherical adapter 17, closing lennym Pyatnikov between the carriage 18 and the thrust bearing 15 through the pin 19. The carriage cassette pedestal wheelset bearing 23 fixed to the axlebox body supporting the insert 22. The body frame 1 is supported on wheel sets 23 and 6 through the axlebox suspension spring 24.

The device operates as follows.

Friday 18 of the car rests on the thrust bearing 15 through the spherical adapter 17. Mutual movements of the parts occur along the spherical antifriction surface of the fabric material 16 lining the surface of the thrust bearing 15. The connection is secured by a pin 19. The edges of the car rest on the side bearings 11, made in the form of box-shaped spring-loaded pads 12 covering the housing 13 with elastic elements 25. Gliding is carried out by platforms 12 along the supporting plates of the pivot beam of the car. Wheel pairs 23 through the liner 22 are mounted on the axle box 6, equipped with springs 24 vertical suspension and rubber-metal elastic elements 7. The latter are placed inside the brackets 5 and absorb horizontal forces. Vertical movement of the axleboxes 6 is carried out in vertical guides 8, each of which is equipped with an anti-friction ceramic-metal lining 9 and a vertical guide protrusion 10. As the lining 9 is worn, the gap is regulated by the elastic properties of the rubber of the element 7 and the clearance mechanism 20.

The device is made in the form of two prototypes.

References

1. Technical information “Overview of the designs of existing types of trucks of freight cars”. SPb., Ministry of Railways of the Russian Federation State Unitary Enterprise NEC “Wagons”, 1999

2. French Patent No. 9002118, 1990.

3. US patent No. 5611284, 1997 (prototype).

Claims (4)

1. The truck of a freight railroad car, comprising a frame consisting of two longitudinal and one transverse load-bearing beams and resting on wheel pairs and axle boxes through a spring axle box suspension with rubber-metal elastic elements mounted on both sides of the axle box, and a pyatnik unit, characterized in that the longitudinal the beam ends of the frame are interconnected by means of additional rods and are equipped with vertical box brackets located on both sides of the axle boxes and containing two-layer rubber elastic elements, the stiffness of one rubber layer being greater than the other, the axleboxes interacting with the casing through vertical guides, each of which is equipped with an antifriction pad and a vertical guide protrusion located inside the vertical groove of the rubber-metal element casing, mounted on the transverse beam of the frame, made in the form of spring-loaded box-shaped platforms covering the body with elastic elements, and in the middle of the transverse beam there is a pyatnik node with spheres with a thrust bearing, inside of which there is a spherical liner with antifriction fabric material deposited on its working surface, interacting with the spherical surface of the adapter, fixed between the carriage’s firing pin and the trolley’s thrust bearing by means of a pin. 2. The trolley according to claim 1, characterized in that the anti-friction lining is made of cermet and equipped with a device for selecting gaps, for example, in the form of a wedge mechanism. 3. The trolley according to claim 1 or 2, characterized in that the spring axle suspension contains springs of variable stiffness. 4. A trolley according to any one of claims 1 to 3, characterized in that the axle box body is equipped with a supporting liner of a pair of wheels.

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