Aar manual of standards and recommended practices brakes and. When the brake is applied, the shoe moves and presses the lining against the inside of the drum. In order to keep up pace with global technological standards, the company has also technical collaboration with ask technica corporation, japan. The rigid shoes sit inside or outside the rotating drum in a diametrically opposed configuration. Brake shoe illustrations 368 51261 daf 200 x 42mm 5127 audi 180 x 30mm 5128 rover, reliant, ford 203 x 32mm 5 ford, vauxhall 203 x 45mm 5129a rover, vauxhall, ford. Retainer hole 1 1 fmsi lining 7 4515g 8 5 4 1 fruehauf xem current design can use in place of 2nd. Linings are glazed 20% or less of lining friction surface. Brake discs are installed on the axle or the side of car spokes board, brake champs make two brake shoes tightly suppressing dynamic plate profile while braking. Aug, 2008 lecture series on design of machine elements i by prof. Figure 8 shows how the resultant force on the brake shoe determines whether the brake will sprag, grab or behave normally. It is used for applications such as cranes, hoists, conveyors and other machinery. Brakes classification single shoeblock brake introductionmechanism 2theta greater than 60 degree different cases of.
In a shoe brake the rotating drum is brought in contact with the shoe by suitable force. Excessive shoe to caliper or shoe to piston clearance. Haldex product relined shoe for 1214 dana gg4536dqr. If the coefficient of friction for the brake lining and the drum is 0. Internal drum shoe brake design equations and calculator. Designated esf or f5 fruehauf p style dana bendix wedge dana meritor wedge stopmaster. The equations needed to design a braking system are not difficult to derive but this page is a reference to most of them. Pdf analysis of drum brake system for improvement of braking. Shoe or block brake in a shoe brake the rotating drum is brought in contact with the shoe by suitable force. Engineering inspiration the geometry of drum brakes. This chapter describes the basic principles of frictional clutches and brakes and outlines design and selection procedures for disc clutches as well as disc and drum brakes.
Linings are glazed greater than 20% of lining friction surface. Fortunately, owing to the position of the resultant force, it is almost impossible to design a conventional drum brake, which will sprag under normal conditions. V674 2 hi cap treadguard brake shoe day one locomotive. A brake is a mechanical device which inhibits motion. The bottom of the service housing contours to complement the 8gauge steel for added strength. Shoes can be interchanged providing that the proper.
Sep 18, 2015 types of brakes brakes mechanical block brake band brake internal or external expanding shoe brake electrical hydraulic 17. A brake shoe is the part of a braking system which carries the brake lining in the drum brakes used on automobiles, or the brake block in train brakes and bicycle brakes. Brake rod connectordesign requirements s4026 es4026629 brake shoe force measurement devicesperformance specification s4024 es4024623 brake shoe go gauge s448 es448293 brake shoe keys s376 es376173 brake shoe limiting contour, lowfriction composition type s4023 es4023621 brake shoe nogo gauge s449 es449295 brake. V606 18 all weather locomotive brake shoe v626 14 day one treadguard locomotive brake shoe the cobra treadguard brake shoe has a special composition material and cast iron inserts.
Lecture series on design of machine elements i by prof. A drum brake is a brake that uses friction caused by a set of shoes or pads that press against a rotating drumshaped part called a brake drum. Aise and nema compliant, ge brakes are used as stopping, holding or retarding brake on cranes, conveyors, hoists and other machinery. The double shoe brake block represents a frictional brake with two pivoted rigid shoes that press against a rotating drum to produce a braking action. Gg4536dqr relined shoe for 1214 dana haldex product. A drum brake is a brake that uses friction caused by a set of shoes or pads that press against a rotating. Brake drums camshafts spring brake ch ambers trp spring brake chambers feature an 8gauge service housing, oe main power spring as well as oe return springs.
The upper shoe tips are actuated by twin hydraulic plungers and a hand brake strut and lever mechanism which has a builtin automatic shoe clearance adjustment device. Lined brake shoes for cam type brakes new lined brake shoes we can take a brake shoe and sell it to you with the lining you want. Computer aided design and analysis of disc brake rotors. Pdf plans shoe rack design ideas download wood craft furniture. The brake shoes are mounted on a back plate and the lower shoe tips are prevented from rotating by a fixed anchor abutment plate riveted to the back plate. Friction between the mechanical brake shoe and brake disc profile leads to braking effect, which converts kinetic energy into heat energy that finally dissipates in the atmosphere. The relevant net braking ratios for cars with high friction composition brake shoes, nonlever hand brakes, and a 30 psi brake pipe reduction from 90 psi brake pipe pressure are shown in table 1.
Brakes fade when the driver applies them for a prolonged time. Brake calculations there are many books on brake systems but if you need to find a formula for something in particular, you never can. A brake is a device by means of which artificial frictional resistance is applied to a moving machine member, in order to retard or shop the motion of a machine. The brake shoe carries the brake lining, which is riveted or glued to the shoe. The drum brake surface is aligned with shoe high spots on the brake lining. The result showed that the value of natural frequency, brake torque and contact analysis increased when using the new design of brake shoe. Component maintenance manual for external design wheels.
How to design single shoeblock brake intro, mechanism, breaking. Ic9528 dc springset shoe brake the ge ic9528 dc springset shoe brake provides a quick response for increased stability. Chakraborty, department of mechanical engineering, iit kharagpur. As a dot 3 or dot 4 brake fluid absorbs water, its boiling point decreases. The shoes are identical and have a face width of 45 mm. Jan 06, 20 clutches, brakes, coupling, and flywheels clutches, brakes, couplings, and flywheels are a group of elements usually associated with rotation that have in common the function of storing andor transferring rotating energy in analyzing the performance of these devices we shall be interested in. Bendix ford cargo fruehauf q meritor design for fruehauf application. Can be converted to conventional eaton brake by using standard hardware does not require cam head change. Frictional brake with two pivoted shoes diametrically.
The term drum brake usually means a brake in which shoes press on the inner surface of the drum. The company has 70% sob with the major oe manufacturers of india in brake shoe segment. The suitable brake torque at the shoedrum interface is the prerequisite of the active safety control. The lining is a molded asbestos having a coefficient of friction of 0. Engineering inspiration brake system design calculations. This brake is used in railway trains and tram cars. Brake attaching hardware is broken, loose or missing. Brake shoe, highfriction composition typelimiting contour s431 es431263 brake shoe, highfriction tread conditioninghigh capacity m997 em99799. Revision 24, dated november 15, 2019 page description of change a8 table a4 legend, wheel bearing grease. Pdf effect of brake pad design on friction and wear with hard. Brake design requirements s401 es401217 brake equipmentapplication form for aar approval of new and untried freight cars. Gray cast iron is the conventional material used for making brake drums of light and heavy motor vehicle.
When shoes press on the outside of the drum, it is usually. As a result, the brake friction industry has seen the birth of different brake pads and shoes in the past decade, each with their own unique composition, yet. The contacting surface of the shoe is coated with friction material. A single block is consists of a block which is pressed against the rim of revolving brake wheel drum. Brakes classification single shoeblock brake introduction mechanism 2theta greater than 60 degree different cases of. Aar manual of standards and recommended practices brakes. A double shoe brake has diameter of brake drum 300mm and contact angle of each shoe 90 degrees, as shown in figure below. The performance of a single shoe or a complete brake is described by either of two dimensionless figures of merit the mechanical advantage or brake factor. The most commonly brakes use friction to convert kinetic energy into beat, though other methods of energy conversion may be employ. A few common configurations of this type of braking are disc brakes, drum brakes and hydrodynamic brakes. Brake shoe core identification chart euclid remanufactured brake shoes core number index by application fmsi application core core i. Mar, 2019 pneumatic drum brake system diagram advantages of drum brake system.
185 134 749 1364 1341 1543 1042 1329 1402 801 420 359 1123 690 1533 181 1322 1085 1447 475 1420 1578 292 919 782 359 41 694 5 525 984 1604 831 255 970 653 166 1470 1305 669 688 1209