AU2008202536A1

AU2008202536A1 - A type of bogie assembling method and device for railroad freight car

Info

Publication number: AU2008202536A1
Application number: AU2008202536A
Authority: AU
Inventors: Yaang Cao; Xu Huang; Ruijin Jiang; Yongjiang Li; Guijun Lui; Li Mao; Fan SONG; Mingdao Sun; Zhiyong Xie; Zhixiong Yan
Original assignee: CSR Yangtze Co Ltd
Current assignee: CRRC Yangtze Co Ltd
Priority date: 2007-06-14
Filing date: 2008-06-06
Publication date: 2009-01-08
Also published as: AU2008101309A4; CN101070070A

Description

P01l Section 29 Regulation 3.2(2) 00 rs

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Application Number: Lodged: Invention Title: A type of bogie assembling method and device for railroad freight car The following statement is a full description of this invention, including the best method of performing it known to us: P111ABAU/1207 00 nA TYPE OF BOGIE ASSEMBLING METHOD AND O DEVICE FOR RAILROAD FREIGHT CAR 0 o FIELD OF THE INVENTION tt This invention covers a component, especially a type of bogie, employed on the freight car. It is a component of rolling stock and mainly used in the bogie of 00 new-type high-speed freight car.

00 BACKGROUND OF THE INVENTION Generally, the bogies of the freight car can be divided into fabricated type bogie with primary suspension Y25) and three-piece type bogie with secondary suspension Barber). The fabricated type is advantaged by less unsprung mass, lower rail dynamic force and high critical speed, whereas its transverse elasticity is limited by the journal spring and the transverse performance at high speed is insufficient. As for traditional three-piece type, its diamond resistant rigidity is inadequate, the performance is weak and the running speed is low. Meanwhile, the unsprung mass is high and the wear between the wheel tracks is serious. Later a swing type bogie (e.g.

SwingMotion) with transverse swing device which comprises spring plank and swing fabricated was designed based on the traditional three-piece freight car bogie. Its transverse elasticity is provided by both the central spring and the transverse swing device which can separate the transverse disturbance with the car body to remarkably improve the transverse performance. However, the heavy unsprung mass of this bogie resulted in higher track impact at high speed. Chinese Patent ZL1275171.5 (Publication No.: CN2517641) showed a new type bogie of high speed freight car which included wheel set, fabricated and bolster. A journal box suspension was installed between the fabricated and the wheel set of this bogie, a disc braking device was installed between the fabricated and the wheel shaft and a mechanic anti-slip device was installed at the wheel shaft end. This bogie was connected with the fabricated through the central multiply rubber spring suspension, longitudinal towing connecting-rod was installed between both bolster ends and the fabricated and the suspended constant-contact resilient side bearing is installed at each side of the bolster top. This structure can improve the bolster diamond resistant rigidity, provide rational longitudinal/transverse positioning rigidity for the wheel set, enhance the vertical/transverse vibration performance of the car, ensure the correct connection between the bolster and the fabricated and increase the critical speed in the sinusoidal motion of the bolster to reach a 160km/h maximum train speed and safeguard the stable and reliable braking performance of the bolster. Nevertheless, the above patent paid no attention to the spring suspension and the enhancement in diamond resistant performance and the optimization of low dynamic performance of the bogie still had certain limitation. Therefore, its overall performance cannot satisfy the requirements and higher car speed is restrained. On the other hand, the unsprung mass of the bogie 00 is high and the wear of the wheel tracks is terrible, thus the further improvement of the bolster is necessary.

SUMMARY OF THE INVENTION The aim of this invention is: providing a new high speed bogie assembling method ID and device with excellent transverse elasticity and less unsprung mass and suitable for the 160km/h maximum running speed based on the weakness of the bogie of the existing high speed freight car.

The mentioned aim of this invention is realized through the technical scheme as follows: a type of high speed freight car bogie including wheel set system, journal box O elastic assembly, side fabricated and bolster. It is featured by: the bogie combines the 00 structural advantages of both rigid fabricated bogie and swing type bogie and the 00 O swing device above the spring which enables the relative swing or rotation between 0 the bolster and the side fabricated is suspended on the journal box elastic assembly.

The journal box suspension technology and the swing technology of the swing device above the spring are flexibly combined. It is a freight car bogie with advanced operational mechanism.

Meanwhile, the elastic assembly comprises the journal box which is installed on the wheel set bearings and the hydraulic elastic element which is provided with damping plates inside with internal chamber filled with liquid, installed on the journal box and composed of upper part, lower part and rubber through vulcanization. Both bearing and vibration damping functions are realized though this hydraulic elastic element.

The vertical vibration of the hydraulic elastic element will result in the internal liquid flow and when the flowing liquid passes the damping plates, the resistance will occur so that the vibration is damped.

The longitudinal connecting rod connects the journal box and the bolster through the rubber ball sleeve to obtain the longitudinal flexible fixing between the journal box and the bolster and improve the longitudinal positioning rigidity of the journal box.

The disc braking device mainly comprises of unit braking cylinder, braking disc, clamp and braking pad.

The mechanic anti-slip device is installed at the wheel shaft end to avoid the wheel from being locked owing to high braking force during the braking of the freight car which will result in the skidding of the wheel.

The high speed freight car bogie in accordance with this invention combines the structural advantages of both rigid fabricated bogie Y25) and swing type bogie Swing Motion). The swing device above the spring is suspended on the journal box elastic assembly to flexibly combine the journal box suspension technology and the swing technology of the swing device above the spring. It is a freight car bogie with advanced operational mechanism and is advantaged by: 1. The employment of the journal box suspension technology considerably reduces the unsprung mass and the vertical dynamic force of the wheel track and improves the vertical dynamic performance of the car.

00 2. The employment of the swing technology of the swing device above the spring O improves the critical speed and the transverse dynamic performance of the car.

3. The employment of the journal box elastic assembly flexibly combines the elastic element and the wearing-free damping and improves the vibration absorption performance of the car.

NO

4. The employment of the longitudinal connecting rod between the journal box and the bolster improved the longitudinal positioning rigidity of the journal box.

INO

The employment of the disc braking device improves the braking force.

6. The employment of the mechanic anti-slip device avoids the wheel skidding in Scase of over braking force.

00 SThe above description shows the swing type bogie with suspended journal box in r accordance with this invention can satisfy the requirements of 160km/h high speed freight car owing to the employment of the special swing device suspended above the spring which ensures the less bogie unsprung mass, high critical speed, low dynamic force of wheel track and excellent transverse performance of the car.

BRIEF DESCRIPTION OF THE INVENTION Fig. 1: Front View of Bogie Fig. 2: Top View of Bogie Fig. 3: Left View of Bogie Fig. 4: Outline of Hydraulic Elastic Element DETAIL DESCRIPTION OF THE INVENTION An example is shown in the attached drawings and the detail description of this invention is given below based on the drawings. The protection scope of this invention includes but does not limit to the scope described in the example.

The attached drawings show this invention is a type of high freight car bogie for rolling stock. The bogie combines the structural advantages of both rigid fabricated bogie and swing type bogie and the swing device above the spring which enable the relative swing or rotation between the bolster and the side fabricated is suspended on the journal box elastic assembly. It flexibly combines the journal box suspension technology and the swing technology of the swing device above the spring. The entire device comprises wheel set system, saddle, side fabricated and bolster. It is featured by a swing device which enables the relative swing or rotation between the bolster and the side fabricated is installed between the bolster and the side fabricated.Such swing devices can be spherical, cylinder, semi-spherical, semi-cylinder or any other shapes similar to spherical or cylinder shape. The number of such devices can be 1 or more. Meanwhile, the bolster and both side fabricateds are restrained in horizontal plane by such swing device to shape an H structure with certain diamond resistant rigidity. And in transverse vertical plane, both side fabricateds act like two hanger 00 rods suspended on the journal box elastic assembly which leads to simultaneous and O transverse movement of the bolster, that is, the transverse swing motion of the swing Sdevice above the spring.

Meanwhile, the elastic assembly comprises the journal box which is installed on the n, wheel set bearings and the hydraulic elastic element which is provided with damping O plates inside with internal chamber filled with liquid, installed on the journal box and Scomposed of upper part, lower part and rubber through vulcanization. Both bearing and vibration damping functions are realized though this hydraulic elastic element.

O The vertical vibration of the hydraulic elastic element will result in the internal liquid flow and when the flowing liquid passes the damping plates, the resistance will occur so that the vibration is damped.

NI The longitudinal connecting rod connects the journal box and the bolster through the 00 rubber ball sleeve to obtain the longitudinal flexible fixing between the journal box and the bolster and improve the longitudinal positioning rigidity of the journal box.

An example of this invention is shown in Drawings 1, 2 and 3. The attached drawings show this invention is a type of high freight car bogie for rolling stock. According to Drawings 1 to 3, the bogie comprises wheel set system 1, side fabricated 6 and bolster 3 and is featured by it combines the structural advantages of both rigid fabricated bogie and swing type bogie and the swing mechanism 5 above the spring which enable the relative swing or rotation between the bolster 3 and the side fabricated 6 is suspended on the journal box elastic assembly 2.It flexibly combines the journal box suspension technology and the swing technology of the swing device above the spring.

The above mentioned swing mechanism 5 above the spring comprises side fabricated 6, bolster 3 and swing device 4 which enables the relative swing or rotation between the bolster and the side fabricated is installed between the bolster and the side fabricated. The swing mechanism 5 above the spring can make transverse swing motion around the journal box elastic assembly 2. The above mentioned journal box elastic assembly 2 is installed on the wheel set system 1 and the above mentioned swing mechanism 5 above the sprung is installed on the journal box elastic assembly 2. The above mentioned swing devices 4 can be spherical, cylinder, semi-spherical, semi-cylinder or any other shapes similar to spherical or cylinder shape. The number of such devices can be 1 to 4. Meanwhile, the bolster 3 and both side fabricateds 6 are restrained in horizontal plane by such swing device 4 to shape an H structure with certain diamond resistant rigidity, which forms a basic condition that such bogie can match a high critical speed. And in transverse vertical plane, both side fabricateds 6 act like two hanger rods suspended on the journal box elastic assembly. Through these two hanger rods, the bolster 3 drives simultaneous and transverse movement of the bolster, that is, the transverse swing motion of the swing device above the spring.

00 The above mentioned journal box elastic assembly 2 includes journal box 10 and O hydraulic elastic element 11. The journal box 10 is installed on the wheel set bearings and the hydraulic elastic element 11 which is provided with damping plates inside with internal chamber filled with liquid, installed on the journal box 10 and composed of upper part 12, lower part 13 and rubber 14 through vulcanization. The hydraulic _n elastic element 11 has certain vertical, transverse and longitudinal elastic rigidities to Iprovide the damping and vertical deflection. The vertical vibration of the hydraulic elastic element 11 will result in the internal liquid flow and when the flowing liquid passes the damping plates, the resistance will occur so that the vibration is absorbed.

IDThe hydraulic elastic element 11 is hinged with side fabricated 6 and the side fabricated 6 and the bolster 3 can transversally move or swing through the swing device 4. The lower part 12 of the journal box elastic assembly 2 is installed on the Swheel set system 1. The journal box elastic assembly acts as both bearing element and 0 vibration absorption element of the bogie. Furthermore, the journal box elastic 00 assembly 2 can swing as a pivot around which the swing mechanism can make Stransverse swinging or movement.

The bolster 3 and both side fabricateds 6 are restrained in horizontal plane by the swing mechanism 5 to shape an H structure with certain diamond resistant rigidity, which forms a basic condition that such bogie can match a high critical speed.

On the bogie is installed the disc type unit braking device 8 which mainly comprises unit braking cylinder, braking disc, clamp and braking pad. The braking disc is installed on the wheel shaft as a part and the unit braking cylinder is connected with the compressed air on the locomotive. When the inlet valve is open, the actuation of the unit braking cylinder will drive the clamp and braking pad to hold the braking disc so as to brake the car. When the inlet valve is closed and the outlet valve is opened, the braking force of the pad on the disc will be released to make the braking device released from the braking status.

The longitudinal connecting rod 7 connects the journal box and the bolster through the rubber ball sleeve to obtain the longitudinal flexible fixing between the journal box and the bolster and improve the longitudinal positioning rigidity of the journal box.

The wheel set system is equipped with the mechanic anti-skid device 9 which is placed at the wheel shaft end. When the wheel is locked tightly due to excessive braking force, the anti-skid device will be engaged to open the air outlet valve of the unit braking cylinder to change the disc braking device from the braked status to released status and prevent the wheel from skidding.

The above description shows the swing type bogie with suspended journal box in accordance with this invention can satisfy the requirements of 160km/h high speed freight car owing to the employment of the special swing device suspended above the spring which ensures the less bogie unsprung mass, high critical speed, low dynamic force of wheel track and excellent transverse performance of the car.

Claims

3. The high speed freight car bogie for rolling stock according to Claim 2, characterized in that the above mentioned swing mechanism above the spring comprises side fabricated, bolster and swing device which enables the relative swing or rotation between the bolster and the side fabricated and is installed between the bolster and the side fabricated, the swing mechanism above the spring can make transverse swing motion around the journal box elastic assembly.
4. The high speed freight car bogie for rolling stock according to claim 3, characterized in that the bolster and both side fabricateds are restrained in horizontal plane by the swing device 4 to shape an H structure with certain diamond resistant rigidity. The high speed freight car bogie for rolling stock accroding to claim 3, characterized in that both side fabricateds act, in transverse vertical plane, like two hanger rods suspended on the journal box elastic assembly, through the said two hanger rods, the bolster drives simultaneous and transverse movement of the bolster, that is, the transverse swing motion of the swing device above the spring.
6. The high speed freight car bogie for rolling stock according to claim 2, characterized in that the said journal box elastic assembly is installed on the wheel set system, and the said swing device above the spring is installed on the journal box elastic assembly.
7. The high speed freight car bogie for rolling stock according to claim 2, characterized in that the said swing devices is spherical, cylinder, semi-spherical, semi-cylinder or any other shapes similar to spherical or cylinder shape, the number of such devices is from 1 to 4.
8. The high speed freight car bogie for rolling stock according to claim 3, characterized in that the said elastic assembly comprises the journal box which is installed on the wheel set bearings, and the hydraulic elastic element which is provided with damping plates inside with internal chamber filled with liquid, 00 installed on the journal box and composed of upper part, lower part and rubber 0 through vulcanization; the hydraulic elastic element is hinged with side fabricated 0and the lower part of the journal box elastic assembly is installed on the wheel set system; the journal box elastic assembly acts as both bearing element and vibration absorption element of the bogie,; the journal box elastic assembly can nswing as a pivot around which the swing device above the spring can make IND transverse swinging or movement. 0
9. The high speed freight car bogie for rolling stock according to claim 3, INO characterized in that the longitudinal connecting rod is provided to connect the journal box and the bolster through the rubber ball sleeve. The high speed freight car bogie for rolling stock according to claim 2, characterized in that on the bogie is installed the disc type unit braking device 0 which mainly comprises unit braking cylinder, braking disc, clamp and braking pad; the braking disc is installed on the wheel shaft as a part, and the unit braking i cylinder is connected with the compressed air on the locomotive; the wheel set system is equipped with the mechanic anti-skid device which is placed at the wheel shaft end.