Using the uncontrolled rotatron for the bogie pivot. The job of a car suspension is to maximize the friction between the tires and the road surface, to provide steering stability with good handling and to ensure the comfort of the passengers. I had to weld the arms to the hubs to keep everything together ubiozur welding ltd. Railteco is capable of producing 20, wheel pieces, 30, axle components, 10, wheelsets, 4, bogie sets and 1, welding frame sets annually. The bogie runt rover is designed with an awesome rockerbogie suspension making it great for climbing over tough obstacles. In this chapter, the focus is on some general bogie design principles and especially design features that interact with the axlebox bearing system. Full text of the challenges of designing the rockerbogie. Railway broad gauge bogie or narrow gauge bogie parts supplier.
The landmine detection robot is constructed using the rocker and bogie suspension mechanism. Bachelor thesis investigation and classification of bogie designs. The rockerbogie suspension is a mechanism that enables a sixwheeled vehicle to passively keep all six wheels in contact with a surface even when driving on severely uneven terrain. Each fiat bogie is provided with four primary vertical. Pdf application of a multistage bogie suspension system to the. Bobo bogie bi axle bogie, axle independently driven.
Alstom bogie pdf bogie during endurance tests performed on the train. Bogie frame is a y frame fabricated and machined structure. The rockerbogie system is the suspension arrangement developed in 1988 for use in nasas mars rover sojourner, and which has since become nasas favored design for rovers. Biaxial bogie frame, speed increase, rail way roughness, stress, finite element analysis 1. Introduction handbook on fiat bogie fq,v cksxh ij fq,v. These are modular suspensions that allow combinations of 2 tandem, 3 tridem and more axles. T railway technology today 5 edited by kanji wako how. Truck bogie suspension system pdf san benito county. One bogie contain three axle, 6 wheel, 3 traction motors, suspension arrangement. Following several technology and research rover implementations, the system was successfully flown as part of mars pathfinder s sojourner rover. Among these mobile systems, its the rockerbogie suspension system that was first used for the mars rover sojourner and its currently nasas favored design for rover wheel suspension. A little project that i was working on a couple days ago.
The articulated trainset and the positioning of the bogies between the bogle are also favourable to the installation of a bogie with a large wheel base. In addition, all 6 wheels are able to turn at least 180 degrees allowing for. Plate frame bogie secondary suspension the secondary suspension of the bogie is mounted crosswise transversely in the centre. What are the disadvantages of the rocker bogie suspension. A simulink diagram is generated by importing solidworks assembly file into matlab followed by simulation. Active secondary suspension in trains a literature survey of. Train spare parts bogie wheels used for turkey railway. Introduction handbook of fiat bogie 1 fq,v cksxh fiat bogie 1. Estimation of bogie performance criteria through onboard condition monitoring parham shahidi1, dan maraini1, brad hopkins1, and andrew seidel1 1amsted rail company, inc. Heavy duty suspension extremely rigid suitable for off road vehicles operating in rough terrain. A bogie bolster is the central section of the bogie that carries the entire weight of a coachs under frame. The foremost being that, since the brake cylinder is mounted on the bogie frame itself and is nearer to the brake beam, the brake application time is reduced.
Railway y25 bogie for railway wagon braking system. Rocker bogie suspension with frc components 3d cad model. Rocker bogie suspension has following disadvantages. This is a rocker bogie suspension much like the ones found on mars rovers that balances itself using a combination of a differential in the center and two pivoting bogies, or bars with wheels on either end. With nearly 5 of ground clearance and 5 of flex this little bot is so much fun to drive. Some of the significant steps in progress are described here. The term rocker comes from the rocking aspect of the links on each side of the suspension system.
Effect of suspension system in the lateral stability of. Standard rockerbogie suspension mechanism, which has been developed in the late 1990s, has excellent weight distribution for different positions on rough terrain. Railway technical web pages archive page vehicle suspension systems introduction almost all railway vehicles use bogies trucks in us parlance to carry and guide the body along the track. Bogie suspension design is a complex and difficult science which has evolved over many years. One of the constant areas of improvement in the design of highspeed bogies has been with weight reduction, which has been essential in. Alstom railway bogie, alstom railway bogie suppliers and manufacturers at. A lateral active suspension for conventional railway bogies article pdf available in vehicle system dynamics 471. Simple dof of a single body 3 linear shuttling lurching bouncing 3 rotational rolling pitching nosing or yaw 9. The rocker bogie mechanism helps the vehicle to move in almost all terrains like desert, snow, rough.
Effect of increasing speed on stress of biaxial bogie frames. The challenges of designing the rockerbogie suspension. Two hydraulic lateral dampers are provided in secondary stage between bogie frame and the loco under frame. We use eight wheeled rocker bogie suspension mechanism for our simulation. This suspension system will help the vehicle to move into the fire hazard zone crossing over the obstructions in the quicker way. Hydraulic shock absorbers used conforming to uic stipulation. This process gave an on going appreciation but did not allow a full anticipated validation. The height of the bogie relative to the rail level could be adjusted by using the screwed spring hangers. Four nested springs for primary suspension and twonested flexicoil springs for secondary suspension. The challenge posed by mer was to design a lightweight rockerbogie suspension that would permit the mobility to stow within the limited space available and deploy into a configuration that the rover could then safely use to egress from the lander and explore the martian surface as proposed by b. Passager car bogie composed of frame, wheelset, suspension device, bolster spring and traction device.
Center pivot does not take any vertical load and is used only for transfer of traction and braking forces. In solidworks each and every parts are analyzed and simulated using simulationxpress. At high speeds it experiences head on collision of wheels with obstacles. Bogie suspension arrangement description of bogie continued. The rocker bogie suspension design has become a proven mobility application known for its superior vehicle stability and obstacleclimbing capability 1.
Pdf behaviour analysis of a conventional bogie and optimization. The influence of the longitudinal suspension stiffness on the critical speed of the bogie is ascertained for straight and curved track type. New design, mostly similar to rockerbogie suspension system, has a natural advantage with linear bogie motion which protects the whole system from getting rollover during. Kolschmethod 12 has been used that explained in reference 10. In this article, well explore how car suspensions work, how theyve evolved over the years and where the design of suspensions is headed in the future. Rocker bogie rover mobility tests picaxe 28x2 duration. Pdf a lateral active suspension for conventional railway. According to wheel arrangement bogie are to two type mainly. This paper proposes a new dynamic rockerbogie suspension system with two modes of operation.
In addition to its relatively simple structure, it has the advantage of decreasing the impact of track irregularities on the railcar at the car suspension point, in comparison to the singleaxle bogie which transmits the impact to the car directly fig. En standard trailer bogie axle used in railway y25 bogie. Based on the structure of the suspension gear, bogies are classified into two types. The main actions conducted to reduce the unsprung masses and the gross weights were aimed at the following main components. Four vertical hydraulic dampers are provided in primary stage between axle and bogie frame. Full text of the challenges of designing the rockerbogie suspension for the mars exploration rover see other formats the challenges of designing the rockerbogie suspension for the mars exploration rover brian d. This would cause an impulsive force to act on front wheels. Train bogie kz4a suspension yaw damper supplies used for kazakhstan rolling stock. All k suspensions are available in both normalheight and loweredheight versions. The rockerbogie suspension system has robust capabilities to deal with uneven terrain because of its distributing of the payload over its six wheels uniformly, while there is one major shortcoming to highspeed traversal over the planar terrain. A bogie may remain normally attached as on many railroad cars and semitrailers or be quickly detachable as the dolly in a.
The movement of the vehicle is made possible through rockerbogie suspension. Precisely a mass reduction of the bogie components promises, in addition to an increase in load. Over the past decade, the rockerbogie suspension design has become a proven mobility application known for its superior vehicle stability and obstacleclimbing capability. Moreover, the actively controlled primary suspension of the mechatronic bogie was tested in summer 2007 during ontrack tests in.
All three types of suspension are found on the rear bogies of rigid vehicles, but rubber is rarely fitted to semitrailers. In order to maximize their maneuverability during the competition, the students set a design criteria of being able to traverse any of the prescribed obstacles in the mining arena. Introduction nowadays, modern technology and its new features. The adjustment allowed for small variations in wheel diameter. Railway bogie and brake system train damper for saudi arabia locomotive parts. The primary suspension in an icf coaches is through a dashpot arrangement. Estimation of bogie performance criteria through onboard.
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