Suspension system for special and heavy weight transport applications operating in especially rough terrain. Description of triaxle straight trucks with his systems. This paper will describe how the mer rockerbogie suspension subsystem was able to meet these conflicting design requirements while highlighting the variety of deployment and latch mechanisms employed in the design. A rocker bogie suspension consists of linkages on either side of the base that pivot or rock in response to terrain features and bogie, which is a linkage with drive.
See bogie spread, volvo tride 38,00046,000, page 17. Elastic elements helical, air, rubber springs these are components which return to their original position when forces causing the affect are removed. The rocker bogie suspension system from last year remains relatively the same from last year. This system is giving a high level of stability to the center of gravity of the robot and provides it with high torque due to its six motors. The main ones are bogie design principle parameters, guiding suspension, primary spring and damping principles that are. This document provides information on axle and suspension applications in volvo vehicles. Three new wagons are subjected to different load conditions and for each wagon a proper set of springs has been suggested. A threedimensional diagram for a rear tandem driving axle bogie suspension is shown in. The term rocker describes the rocking aspect of the larger links present each side of the suspension system and balance the bogie as these rockers are connected to each.
A bogie may remain normally attached as on many railroad cars and semitrailers or be quickly detachable as the dolly in a road train or in railway bogie exchange. Y25freight truck have been analysed in reference 10. Rocker bogie rover mobility tests picaxe 28x2 duration. The benefits of different suspensions used in heavy duty low. Design analysis of rocker bogie suspension system and access. Dec 01, 2015 this system is giving a high level of stability to the center of gravity of the robot and provides it with high torque due to its six motors. The challenge posed by mer was to design a lightweight rocker bogie 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. Bogie suspension system and access the possibility to implement in front loading vehicles, iosr journal of mechanical and civil engineering, e. Basics of vehicle truck and suspension systems and. The bogie bracket plays a key role axially as well as radially. Bobo bogie bi axle bogie, axle independently driven it contain 2 axle 4 wheels, 2 tm. One bogie contain three axle, 6 wheel, 3 traction motors, suspension arrangement. Bogie project gutenberg selfpublishing ebooks read. Introduction over the past decade, the rockerbogie suspension design has become a proven mobility application known for its superior vehicle stability and obstacleclimbing capability.
The rockerbogie suspension design has become a proven mobility application known for its superior vehicle stability and obstacleclimbing capability 1. There are three commonly used types of bogie suspension found in britain, shown in figure 1. Volvos articulated haulers are built for tough reallife conditions. Lets have a look at some of its remarkable qualities. The rocker bogie system is the suspension arrangement used in mars rovers introduced for mars pathfinder and also used on mars exploration rover mer and mars science laboratory msl missions. This is in between bogie and vehicle either through a bolster or bolsterless. Jan 09, 20 rocker bogie suspension system nikhil vaidya.
Bogie frame bolster of wap 4 locos this flexi coil bogie marki has two stages of vertical suspension in which helical spring have been used at primary and secondary stages. Jpl states that this rocker bogie system reduces the motion of the main mer vehicle body by half compared to other suspension systems. Bogie suspension, vehicle suspension industry fuhua. 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. Nasa has developed this suspension system in a series of the project called rocky. This paper will describe how the mer rocker bogie suspension subsystem was able to meet these conflicting design requirements while highlighting the variety of deployment and latch mechanisms employed in the design. Mar 12, 2012 save up to 85 pounds with the softek front suspension system, providing superb ridability, stability, and durability for heavy duty truck applications. They can operate at high speed even on the most challenging haul routes, and they work effectively on the roughest, hardtoreach load and dump sites. Pdf modelling and characteristic analysis of triaxle trucks with. Products trailer axles and suspension systems mechanical. The unique feature of an active suspension system is the existence of an actuator between car body and bogie trucks, both pneumatic and oil hydraulic. System configuration figure 1 shows the schematic diagram of an active suspension system. Suspension to absorb shocks between the bogie frame and the rail vehicle body. The challenges of designing the rockerbogie suspension.
Agricultural hybrid truck that use a rockerbogie suspension system. 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. Design analysis of rocker bogie suspension system and. Volvo dynamic steering is now available for all axle configurations, including trucks with dual front axles. Each of the rovers six wheels has an independent motor.
The rocker bogie suspension system, which was specifically designed for space exploration vehicles have deep history embedded in its development. Design and implementation of a rockerbogie suspension for a mining robot. A bogie may remain normally attached as on a railway carriage car or locomotive, or on a semitrailer or be quickly detachable as the dolly. Design and implementation of a rockerbogie suspension for. A truck suspension comprising a frame, a first bogie wheel supporting truck including a first sleeve, a second bogie wheel supporting truck including coaxial second and third sleeves extending in spaced relation to each other at a distance at least as great as the axial length of said first sleeve, means pivotally mounting said first and second trucks. Bogie suspension system outboard marine corporation. Some of the significant steps in progress are described here. Bogies take various forms in various modes of transport. In a suspension system for supporting a railway car, said car having an underframe to transmit the weight of the car to at least one downwardly projecting pivot pin, said bogie having a rigid frame means mounted on at least two pairs of trackengaging wheels. Primary, between axle box and bogie frame and secondary, between bogie frame and bolster.
This can be of inside frame type where the main frame and bearings are between the wheels, or more commonly of outside frame type where the main frame and bearings are outside the wheels. Nasa developed the rocker bogie suspension system for their rovers and was. Following several technology and research rover implementations, the system was successfully flown as part of mars pathfinders sojourner rover. A bogie may remain normally attached as on many railroad cars and semitrailers or be quickly detachable as the.
The primary mechanical feature of the rocker bogie. I had to weld the arms to the hubs to keep everything together ubiozur welding ltd. 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. International journal of advance research and innovative ideas in education 3. Unlike your car suspension system, rocky bogie system can enable the robot to climb an obstacle has twice its wheel diameter depends on the motor torque and wheel surface friction.
One of the main advantages of these air suspensions is that the driver is more comfortable when driving a vehicle or trailer with air suspensions. The suspensions are considered the best substitute to leaf spring suspensions. What are the reasons behind using rocker bogie suspensions in. The doosan moxy articulated dump truck is designed to work under rough conditions and can also travel at speeds up to 31 mph. It helps maintain maximum articulation of the suspension as well as durability. The dana spicer axle can only be used with the voas rear suspension. Using the uncontrolled rotatron for the bogie pivot. Tandem axle lift allows the rearmost drive axle on the tandem bogie to be disengaged and raised, to reduce fuel consumption and turning radius. View and download volvo group 655601 service manual online. 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. Casnub bogie box bogie uic bogie cast steel bogie diamond frame bogie 601. This bogie can resist mechanical failures caused by the harsh environment on mars. According to wheel arrangement bogie are to two type mainly. As with any suspension system, the tilt stability is limited by the height of the center of gravity.
Notes volvo body builder instructions vn, vhd, vah, section 6 usa8165691 date 1. Railway car bogie suspension system anffrangeco, s. 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. The rocker bogie 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. The low frame type suspension is suitable for normal cars, as well as high clearance vehicles due to the great stability. A truck suspension comprising a frame, a first bogie wheel supporting truck including a first sleeve, a second bogie wheel supporting truck including coaxial second and third sleeves extending in spaced relation to each other at a distance at least as great as the axial length of said first sleeve, means pivotally mounting said first and second trucks on said frame for.
On the earliest trucks up until the late 50s leaf springs were used at both front and rear, just like the stage coaches of the wild west. It features simple, sturdy, and durable structure, and is in normal height. Effect of suspension system in the lateral stability of. This paper proposes a new dynamic rockerbogie suspension system with two modes of operation. 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. In this paper, the suspension springs of bogie md52 with mm line gauge have been designed to satisfy both the static and dynamic conditions. What are the reasons behind using rocker bogie suspensions. 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.
An air suspension system consists of polyurethane bags and rubber that are inflated using a compressor. Chapter 6 bogies and suspension hindi content page 1 of 121 chapter 6 bogies and suspension at present, following four types of bogies are in service. May 01, 2002 on the earliest trucks up until the late 50s leaf springs were used at both front and rear, just like the stage coaches of the wild west. The rocker bogie suspension design has become a proven mobility application known for its superior vehicle stability and obstacleclimbing capability 1. The majority of semitrailer suspensions found in britain are currently based on steel leaf springs but the proportion of air sprung systems is growing rapidly. Design and implementation of a rockerbogie suspension for a.
Bogie bracket saddle bracket the bogie bracket assembly saddle bracket provides stability for lateral movement and serves as an anchor for the spring cradle and the parabolic spring assembly. This system allows for better maneuverability both during motion and in place. The design was also to focus on the automation and drive systems. The main focus of this chapter are the bogie features that are directly or indirectly related to the axlebox application. Bogie suspension system and access the possibility to implement in front loading vehicles, iosr journal of mechanical and civil engineering, eissn. Page 8 group 37 wiring diagram fl6 component wiring diagram index page 34 bogie lift, aride page 35 air suspension, 4x26x2, rigid, emedium chidb344350 page 36 air suspension, 4x26x2, rigid, emedium chid. The ifs independent front suspension arrived on the. Bogie suspension design is a complex and difficult science which has evolved over many years.
Page 8 group 37 wiring diagram fl6 component wiring diagram index page 34 bogie. Its also available in combination with individual front suspension. Almost all railway vehicles use bogies trucks in us parlance to carry and guide the body along the track. One design characteristic that was important is that each side of the suspension can be placed on the other side without alteration. The rockerbogie suspension system passively keeps all six wheels on the robot in contact with the ground even on uneven surfaces. A bogie in some senses called a truck in american english is a chassis or framework carrying wheels, attached to a vehicle, thus serving as a modular subassembly of wheels and axles. It has been used in the 2003 mars exploration rover mission robots spirit and opportunity, on the 2012 mars science laboratory msl missions rover curiosity, and is slated for use in the mars 2020 rover. Bogie designs today, very different bogie design principles are applied. Its most remarkable advantage is its obstacle climbing capability.
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