WO2021082563A1

WO2021082563A1 - Railway wagon bogie and integral brake beam thereof

Info

Publication number: WO2021082563A1
Application number: PCT/CN2020/105307
Authority: WO
Inventors: 黎巧能; 邹德顺; 江荷燕; 宋帆; 李华宴
Original assignee: 中车长江车辆有限公司
Priority date: 2019-10-29
Filing date: 2020-07-28
Publication date: 2021-05-06
Also published as: CN110641511A

Abstract

An integral brake beam for a railway wagon bogie is provided, and comprises a brake beam frame (1). A brake shoe holder (2) is provided on each beam frame end (16) at two ends of the brake beam frame (1). A support beam (13) serving as a lever support is provided at the middle of the brake beam frame (1). The support beam (13) and the brake beam frame (1) are integrally formed by means of casting or forging. The support beam (13) comprises two support plates (131) spaced apart from each other. A through-hole is provided on each of the support plates (131). The two through-holes together form a lever mounting hole (14) for connecting a brake lever. A railway wagon bogie using the integral brake beam is also provided. In the integral brake beam, a longitudinal support beam (13) is integrally disposed at the middle of the brake beam frame (1), replacing the use of a conventional combined support, thereby reducing the risk of structural failure caused by an assembly between an original support and the brake beam frame, and improving the reliability of the brake beam.

Description

Railway freight car bogie and its integral brake beam

Technical field

The invention relates to a railway freight car bogie, in particular to a railway freight car bogie and an integral brake beam.

Background technique

At present, most railway freight cars adopt the structure with bogies, that is, the car body is supported on the front and rear bogies, and the car body and the bogie can rotate relative to each other, which is convenient for the cars to pass the curve smoothly, and the load and length of the freight car are improved. Both the volume and volume can be increased, and the operation quality can be improved to meet the needs of railway transportation development.

The brake beam is one of the key components of the railway freight car bogie. When the vehicle brakes, it transmits the braking force to the brake shoe to stop the vehicle from moving forward. The existing brake beam generally adopts a combined brake beam, that is, the pillar is assembled with the brake beam frame by welding, bolting or riveting. The welding connection mode is used, and the welding seam between the pillar and the brake beam frame is prone to cracks under the action of the brake fatigue force, such as a welding brake beam disclosed in CN109664912A. Bolt connection or riveting method is adopted. The strut and the brake beam frame need to be clamped by interference fit when opening the crotch, and one end is bolted or riveted to the brake beam frame, such as the combined brake beam for railway freight cars disclosed by CN201116128Y , This method requires high assembly technology, and the bolt or rivet connection has high requirements for anti-loosening, and there is a safety risk of bolt or rivet loosening.

Summary of the invention

The purpose of the present invention is to provide a railway freight car bogie and its integral brake beam which can improve the reliability of the brake beam frame.

In order to achieve the above objectives, the integral brake beam for railway freight car bogies designed by the present invention includes a brake beam frame, and a brake shoe holder is provided on each of the beam frame ends at both ends of the brake beam frame. The middle part of the brake beam frame is provided with a support beam as a lever pillar. The support beam and the brake beam frame are manufactured as a whole by casting or forging. Each support plate is provided with a through hole, and two The through holes together constitute a lever mounting hole for connecting the brake lever.

Preferably, a bushing is sleeved in the lever mounting hole, which is connected with the brake lever through a round pin.

Preferably, the length direction of the support beam is perpendicular to the length direction of the brake beam frame, and the direction of the central axis of the lever mounting hole is consistent with the length direction of the brake beam frame. The purpose is to ensure that the included angle between the longitudinal center plane and the longitudinal vertical plane of the basic braking device is zero, to prevent the brake beam from deviating due to lateral force, thereby avoiding wheel eccentric wear.

Preferably, the brake beam frame includes a front wall, a rear wall, a web, an end of the beam frame and the support beam, and the front wall and the rear wall form an arched beam frame structure; The two ends of the supporting beam are respectively connected with the front wall and the rear wall.

Preferably, the cross-sectional shapes of the front wall and the rear wall gradually decrease from the middle to the two ends.

Preferably, the end of the beam frame is provided with an end platform, the back of the brake head support is provided with a "cock" shaped slot, and the brake head support is clamped in and fixed on the end platform through the slot .

Preferably, a brake shoe mounting surface is provided at the front of the brake shoe support, and the elevation angle of the center line of the brake shoe mounting surface with respect to the installation plane of the slot is 13°.

Preferably, the outermost side of the end of the beam is provided with an end bevel, and the angle between the end bevel and the installation plane of the brake beam is set to 12°. The design purpose of the elevation angle to the end platform is to alleviate the "head-dropping" phenomenon of the brake beam frame and alleviate the phenomenon of upper and lower eccentric wear of the brake shoe.

Preferably, two safety hangers are further provided on the brake beam frame, and a safety hanger is installed between the two safety hangers.

The invention also provides a railway freight car bogie adopting the integral brake beam as described above.

Compared with the prior art, the present invention has the beneficial effect that: the integral brake beam adopts an integral brake beam frame structure, and the longitudinal support beam is integrated in the middle of the brake beam frame, instead of the traditional combined pillars, reducing The risk of structural failure caused by the assembly of the original pillar and the brake beam frame is eliminated, the reliability of the brake beam is improved, and the structure is simple and reliable, and the maintenance is convenient.

Description of the drawings

Fig. 1 is a three-dimensional schematic diagram of an integral brake beam designed by the present invention.

Figures 2 to 4 are respectively the front, top and right structural schematic diagrams of the integral brake beam in Figure 1.

Fig. 5 is a schematic diagram of the structure of the brake beam frame in Fig. 1 (the perspective of Fig. 3).

Fig. 6 is a schematic diagram of the structure of the brake head in Fig. 1 (the perspective of Fig. 4).

Since the integral brake beam has a left-right symmetrical structure, in order to better express the graphic details, only half of the view is drawn in Figures 2, 3, and 5.

Among them: brake beam frame 1, front wall 11, rear wall 12, support beam 13, support plate 131, lever mounting hole 14, web 15, beam end 16, end platform 161, end slope 162 , Brake shoe support 2, brake shoe mounting surface 21, card slot 22, undercut slot 221, bushing 3, safety hanger 4, safety hanger 5

Detailed ways

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

As shown in Figures 1 to 6, the integral brake beam designed by the present invention includes an integrally casted brake beam frame 1, two brake shoe supports 2, two bushings 3, two safety hangers 4 and A safety hoist 5.

The brake beam 1 includes a front wall 11, a rear wall 12, a supporting beam 13, a web 15 and a beam end 16. The front panel 11 and the rear panel 12 are enclosed in a bow shape, and the cross-sectional shapes of both of them decrease from the middle to the ends. The web 15 is located on the inner side of the arc and is perpendicular to the front wall 11 and the rear wall 12, which can improve the overall structural strength.

The supporting beam 13 is composed of two mutually parallel supporting plates 131, and the two supporting plates 131 are perpendicular to the rear panel 12, and a lever mounting hole 14 is respectively processed thereon. The axis of the two holes is in the length direction of the brake beam 1 ( The two ends of the rear panel are connected together) to ensure that the included angle between the longitudinal center plane and the longitudinal vertical plane of the basic braking device is zero, to prevent the brake beam from deviating due to lateral force, thereby avoiding wheel eccentric wear . The two supporting beams 13 together are equivalent to the lever support in the prior art. The two lever mounting holes 14 are respectively installed with bushings 3, and the bushings 3 are pressed in by an interference fit and connected to the brake lever through a round pin.

Brake beam frame 1 is welded to the end 16 of the beam frame at the left and right ends of a brake shoe holder 2, which is welded to the middle position of the end platform 161 of the beam frame end 16, on the same side as the two support plates 131. The front part of the shoe 2 is the brake shoe mounting surface 21, and the elevation angle between the center line and the horizontal plane is 13°. The back of the brake shoe support is designed with a "cock"-shaped slot 22, and the slot 22 is inserted into the beam end 16 The end platform 161 is connected by welding. The upper and lower corners of the inner side of the clamping groove 22 of the brake head 2 are provided with undercut grooves 221 to facilitate the processing of the clamping groove 22 and improve the welding processability with the beam end 16.

Both ends of the beam end 16 are provided with parallel end bevels 162 up and down. The end bevels 162 are used to connect the bogie, and the included angle with the installation plane of the brake beam 1 (horizontal plane after installation) is 12° The elevation angle α between the center line of the brake shoe installation surface 21 and the installation plane of the slot 22 (horizontal plane after installation) is 13°, and the setting of the above two angles can alleviate the "heading" phenomenon of the brake beam.

After the two safety hangers 4 and the safety hangers 5 of the brake beam are assembled, they are connected to the rear panel 12 by welding.

This embodiment also provides a railway freight car bogie, the brake beam adopts the integral brake beam as described above, and the rest of the bogie adopts a conventional design, which will not be repeated here.

Claims

An integral brake beam for railway freight car bogies, which is characterized in that it comprises a brake beam frame (1), and the beam frame ends (16) at both ends of the brake beam frame (1) are respectively provided with A brake head (2), the middle of the brake beam frame (1) is provided with a support beam (13) as a lever pillar, and the support beam (13) and the brake beam frame (1) are cast or forged Manufactured as a whole; the supporting beam (13) includes two supporting plates (131) arranged at intervals, and each supporting plate (131) is provided with a through hole, and the two through holes together form a Connect the lever mounting hole (14) of the brake lever.
The integral brake beam according to claim 1, wherein the two lever mounting holes (14) are respectively sleeved with bushes (3).
The integral brake beam according to claim 1 or 2, characterized in that: the length direction of the support beam (13) is perpendicular to the length direction of the brake beam frame (1), and the lever mounting hole (14) The direction of the central axis of the brake beam is consistent with the length of the brake beam frame (1).
The integral brake beam according to claim 1 or 2, characterized in that: the brake beam frame (1) includes a front wall (11), a rear wall (12), a web (15), and The end of the beam (16) and the support beam (13), the front wall (11) and the rear wall (12) form an arched beam structure; the two ends of the support beam (13) are respectively It is connected with the front wall (11) and the rear wall (12).
The integral brake beam according to claim 4, characterized in that the cross-sectional shape of the front wall (11) and the rear wall (12) gradually decrease from the middle to the two ends.
The integral brake beam according to claim 4, characterized in that: the end of the beam frame (16) is provided with an end platform (161), and the back of the brake head (2) is provided with a ”-Shaped card slot (22), the brake shoe holder (2) is inserted into the card slot (22) and fixed on the end platform (161).
The integral brake beam according to claim 6, characterized in that: the front part of the brake shoe support (2) is provided with a brake shoe mounting surface (21), and the center line of the brake shoe mounting surface (21) The elevation angle of the installation plane relative to the card slot (22) is 13°.
The integral brake beam according to claim 1 or 2, characterized in that: the outermost side of the beam end (16) is provided with an end bevel (162), and the end bevel (162) and The included angle of the installation plane of the brake beam (1) is set to 12°.
The integral brake beam according to claim 1 or 2, characterized in that: the brake beam frame (1) is further provided with two safety hangers (4), and the two safety hangers (4) A safety hoist (5) is installed between ).
A railway freight car bogie adopting the integral brake beam according to any one of claims 1-9.