Showing papers on "Disc brake published in 1986"

Disc brake for vehicles

Abstract: 1. Disc brake for vehicles having a sliding caliper (9) carrying clamping members (13), the caliper embracing a brake disc (1) rotating preferably in one direction (arrow direction 2) and having near its ends situated in the circumferential direction guide means (pin guide means 8, 14) axially slidable to mounting means (6, 15) connected to a brake carrier (3), and having brake linings (12) on both sides of the brake disc (1) arranged between it and the brake caliper (9), characterised in that the mounting means (6, 15) are formed as intermediate parts between the brake carrier (3) and the sliding guide means (8, 14) and in that the mounting means (6) on the entry side of the brake disc is rigidly connected to the brake carrier (3), and the mounting means (15) on the exit side of the brake disc is, within limits, movably connected to the brake carrier (3).

Self-energizing disc brakes

Abstract: A self-energizing disc brake of the spreading type is disclosed. In the disc brake rotatable friction discs provided on opposite sides with linings are adapted to be brought into engagement with radial braking surfaces in a housing by an actuator assembly. The actuator assembly comprises pressure plates located between the discs and centered by pilot lugs, and balls located in oppositely inclined recesses in the adjacent faces of the pressure plates. At least the linings which engage with the pressure plates are separated into annular rings by an annular groove, and the groove is substantially coincident with a pitch circle of constant diameter upon which the recesses lie in an angularly spaced relationship. The groove increases the degree of cooling in the regions of the base of the recesses, thereby reducing the likelihood of hot spotting occurring in such regions.

Development of Disc-Brake Design Method Using Computer Simulation of Heat Phenomena

Abstract: In order to develop a vehicle efficiently, the performance of individual parts must be accurately estimated in the design stages. However, conventional methods of design have relied upon empirical techniques, resulting in the prolongation of vehicular development. Therefore, with a view toward eliminating such delay in the course of vehicle development, a variety of design investigation techniques using computers were examined. A new technique has been created in the case of disc rotors by combining existing investigation methods with newly developed techniques. The purpose of this paper is to introduce a newly-developed design investigation system for the thermal characteristics of disc rotors which have hitherto been difficult to quantify. As the first step, the temperature phenomena of disc rotors were theoretically considered by analyzing experimental data, referring to many studies in this field. On the basis of these results, a computer simulation technique was developed which enables the transient temperature characteristics and thermal strength performance to be quantitatively estimated in actual running conditions. At present, part of this technique is in practical use as a disc-rotor design investigation system, yielding satisfactory results. In this study, the disc rotor for the model 300ZX vehicle was used.

Friction braking system and apparatus for appliance induction motor drive

Abstract: A friction braking system located entirely inside an induction motor of an appliance quickly stops rotation of the rotor in the appliance motor, for example such as a food processor, whenever the A.C. electrical power is turned off. Thus, rotation of any tool being operated in the appliance is quickly stopped, whenever the electrical power is interrupted. The rotor in the induction motor is axially slidably mounted on the motor shaft and is keyed to the shaft for permitting axial shifting displacement of the rotor relative to the stator while preventing any angular displacement of the rotor relative to the shaft. Consequently, the rotor and shaft always turn and stop as a function unit. A friction brake lining is affixed within the motor housing offset from the axis of the motor shaft as far as practicable. A disc brake mounted onto the rotor has an annular friction braking surface positioned for engagement against the brake lining. The rotor is arranged for an axial thrust to shift the rotor in an axial direction away from its normal operating position aligned with the stator, whenever the electrical power is interrupted, thereby applying friction braking action quickly and at a relatively large moment arm as compared with the radius of the rotor for effective braking. The brake disc may include motor-cooling fan blades. An inverted V-shaped brake surface configuration is also shown for enhancing braking action.

Spot-type disc brake for an automotive vehicle

Abstract: A spot-type disc brake for automotive vehicles is disclosed including a brake carrier having a fixation section adapted to be affixed to the vehicle, a pair of circumferentially located carrier arms, a brake housing including axially disposed lateral guide attachments and a pair of guide pins extending from opposite sides of the fixation section of the carrier define two guide sections, one each received in openings in a respective one of the guide attachments. One guide pin section of each guide pin is axially offset within its respective guide opening.

Disc brake assembly having an electrical lining wear indicator

Abstract: A sliding-caliper disc brake assembly includes an H-shaped anti-rattle spring for a brake backing plate that is movable directly by a brake apply piston and an electrical lining wear indicator comprising a mounting portion molded from electrically insulating plastics material with an embedded loop of electrical contact wire fastened on to a central region of the anti-rattle spring. A leg of the mounting portion extends into a recess formed in a layer of friction material carried by the brake backing plate. The mounting block is formed with an internal recess a pair of lateral locating arms and a snap-over detent tongue for co-operation with the anti-rattle spring to ensure secure retention of the mounting portion in position on the spring.

Disk brake grinder

Abstract: A method and apparatus for surfacing the opposed faces of brake disks achieves a surface pattern which promotes proper wearing-in of the disk and brake shoes or pads. The abrasive surface of a rotating abrading wheel applied to a brake disk rotating in the same angular direction as that of the abrading wheel. A rotating cup-shaped abrading wheel is tilted slightly with respect to the brake surface so that only one portion of the wheel engages the disk at a time resulting in a resurface pattern of lines that essentially do not cross over each other.

Electric wheel drive device

Abstract: PURPOSE: To facilitate an easy maintenance as well as to attempt an improvement of a cooling efficiency in the titled device such as a dump trucks for mines and the like by forming a cooling circuit including a disc brake, an electric motor, an oil cooler and the like whereby circulating oil by means of a hydraulic pump which can be rotated in either way of the normal and reverse directions. CONSTITUTION: Oil in the bottom of each speed reducer 12 and 20 is sucked out by a pump M through a gear case 18, a ring gear 17, and an oil path (d) in a plate 41 whereby a part of the oil is pressure fed to the plate 41, the ring gear 17, the gear case 18, an inner case 32, and a disc brake 30 through an oil path (e) so as to be lubricated while being cooled. And a pump shaft 15, a sun gear 13, and an output shaft 9 are lubricated while being cooled through an oil path (f) by the rest of the pressure oil, which is forwarded to a passageway (g) by centrifugal force of a rotor 8 for lubricating and cooling the rotor 8 and a stater 4. Oil accumulated at the bottom of an electric motor 3 is sent back to an oil cooler 43 through an oil path (j) by a pump 10 so as to be cooled by wind. This constitution can improve a cooling efficiency. COPYRIGHT: (C)1987,JPO&Japio

Disc for disc brakes

Abstract: The present invention provides a disc for a disc brake, the disc comprising two annular members arranged coaxially with respect to each other and joined together by generally radially extending vanes and pillars, which project from a central web located between the annular members The vanes extend for part of the radial extent of the annular members, and the pillars are located in a region not occupied by the vanes and preferably radially beyond the vanes Power absorption and noise generation is reduced considerably as a result of the reduced vane overall diameter, as compared to a disc of like diameter with the conventional long radial vanes However, the desired cooling is maintained due to the surface area presented by the combination of shorter vanes and pillars

Brake device for motor vehicles

Abstract: A disk brake system employing a caliper support bracket pivotally mounted about the axis of a first disk which is coupled with a hydraulic cylinder. The hydraulic cylinder in turn drives a second caliper assembly on a second disk. The hydraulic cylinder driven by the caliper support bracket is aligned with the plane of the disk. A bell crank may be employed in alignment with the disk to couple the caliper support bracket and the hydraulic cylinder together.

Caliper disc brake assembly

Abstract: A disc brake unit for machinery, hoists and the like having a pair of brake shoes normally spring biased to a brake engaged condition A hydraulically operated first piston may be hydraulically actuated to relieve the spring bias to release the spring pressure acting on the disc and thus release the brake A second piston may then be actuated for moving the brake shoes against the disc and applying a modulated force to the disc while the fist piston is in position to oppose the spring bias, to thereby apply slip braking torque to the output shaft

Handbrake mechanism for single-cylinder, truck-mounted railway car brake assembly

Abstract: A handbrake arrangement for a single cylinder, truck-mounted, railway car brake assembly comprising a lever system mounted on the body of the single brake cylinder, which is, in turn, mounted on one of a pair of truck brake beams. The lever system is connected to the handbrake chain, so that operation of the handwheel effects relative movement between the brake cylinder body and brake cylinder push rod. This results in the truck brake beams being spread apart into braking position in the same manner as occurs during a pneumatic brake application, via the respective brake beam, transfer levers and force-transmitting connecting rods that extend between the brake beams.

Electric motor with deformable disk brake

Abstract: An electric motor has a disk brake which is designed as an electromagnetically operated spring-loaded brake, acts as a standstill brake and has a thin, elastically flexible brake disk (12) of spring steel. This brake disk (12) is immovably fixed on the motor shaft (2) between an axially movable, rotationally fixed armature (8) of the electromagnet and a stationary brake part (13) which forms the outer brake housing. The annular stator (4) of the electromagnet surrounds the motor shaft, with formation of a free annular space which offers room for further attaching parts, for example a tachometer generator and/or a phase-angle sensor, or else for a ball bearing carrying the shaft. Borne axially displaceably in the stator (4) is a coil (6) which, in the braking state, is pressed by compression springs (7) against the armature (8), which for its part presses an annular rim zone (12a) of the brake disk (12), with elastic deformation of the same, against the stationary brake part (13). When the coil (6) is excited, the stronger magnetic force pulls the armature (8) back from the brake disk (12). The thin brake disk (12) is characterized by a small moment of inertia, owing to its low weight.

Spring for a disc brake, and disc brake equipped with such a spring

Abstract: A spring (40) comprises a folded metal leaf including a mounting portion (42) which is joined elastically by its sides, which are circumferentially spaced apart (46, 48), to two rigid actuating portions (58, 60), a first rigid portion (58) lying parallel to the axis of the disc and being capable of pushing elastically by its two free ends the support plates (26, 28) in a direction which is essentially circumferential (T), a second (60) of the rigid portions (58, 60) also lying parallel to the axis of the disc and being capable of pushing elastically, by its two free ends, the support plates (26, 28) essentially radially (R) toward the axis of the disc.

Wear indicator for friction linings

Abstract: The cable (70) of a wear indicator for friction linings (54) of a spot-type disc brake having a floating caliper (12) is received in a trough (72) of the contact pressure web (62) of a hold-down spring (60) for the lining so as to protect the cable from damage. The trough is covered by a sheet metal member (74).

Pressure modulator for anti-skid brake systems

Abstract: A pressure modulator for anti-skid systems in vehicle brake systems, including a plunger/cylinder assembly actuatable merely by supplying electrical auxiliary energy and in the form of a linear actuator is incorporated into a hydraulic or pneumatic pressure line between a master brake cylinder and at least one associated wheel brake cylinder in such a way that upon the onset of ABS functions a pump plunger is displaced by a linear motor action in such a way that fluid pressure arriving from the master brake cylinder is counteracted while the wheel brake cylinder pressure is simultaneously relieved. By appropriate design including a double check valve, ASR functions (anti-slip regulation) are also attainable, for which the pressure modulator can be mounted directly in an appropriately shaped housing recess of a brake caliper such as that of a disk brake.

Mounting device for a brake disc

Abstract: 1. A mounting device for a brake disc (6) on a wheel hub (7) of a motor vehicle, the brake disc (6) being held on the hub (7) by engagement means (8) and being secured by way of a compression ring (19) fastened to the wheel hub (7), characterized in that the thermal expansion coefficient of the wheel hub (7) is greater than that of the brake disc, and the engagement means (8) of the said brake disc (6) are arranged distributed on the inner radial boundary edge (10) of a brake surface (11) of the brake disc (6) facing the middle of the vehicle, project axially from a plane (X-X) of the said surface (11) and are arranged in openings (9) in the wheel hub (7), and a channel-shaped depression (20) of a connexion flange (13), which is provided on the edge and whose radially outer boundary ring (21) is supported in a groove (22) in the braking surface (11), is provided between the openings (9).

Strut type suspension for automobile

Abstract: Disclosed is a strut type suspension for automobiles, consisting of a member for rotatably supporting a wheel, a lower control arm extending in the widthwise direction of a chassis and connected pivotably at its outer end to the support member, and a disc brake unit or internally expansible drum brake unit provided in the wheel. The disc brake unit is provided in its central portion with a recess opened to an inner side of the chassis, an outer end fixing portion of the lower control arm for connection to the support member being set in said recess so as to be close to the center line of ground contact of the wheel. In the above-mentioned strut type suspension for automobiles, which is provided with an internally expansible drum brake unit in a wheel, a support base to which an anchor block is fixed is formed on an inner side surface of a back plate of the drum brake unit so as to project inward therefrom, and a recess defined in an outer side surface of the back plate so as to deflect toward the projecting support base. An outer end fixing portion of the lower control arm, which is joined to the support member, is set in the recess so as to be close to the center line of ground contact of the wheel.

Disc brake caliper support structure

Abstract: A disc brake caliper support structure is disclosed which comprises a rear arm forming a cylinder containing a piston for pressing a friction pad supported and guided by an anchor pin and a front arm for fixing another friction pad to make a caliper holding disc rotors with both the friction pads therebetween movable in the axial direction of guide pins by inserting a plurality of guide pins installed on the caliper in the support member fixed to a bogie frame. One guide pin and the support member are floatably coupled in such a manner as to oscillate relative to each other through a spherical bush and a spherical member, each being set in position by the support member. The other guide pin and the support member are floatingly coupled in such a manner as to oscillate relative to each other through a vibration-proof cylindrical rubber member with a cylindrical inner liner formed with rubber whose outer peripheral axial threads are sawtooth-like in the peripheral direction.

Disk brake motor

Abstract: A disk brake motor comprises an electric motor having a housing, an electromagnet, at least one friction surface and a brake wheel which is in contact with the friction surface during braking, the brake wheel including an impeller for drawing in and impelling air so that the air flows tangentially of a surface of the electromagnet into the brake wheel and past the friction surface onto a surface of the housing of the electric motor.

Disc brake for motorcycles

Abstract: A disc brake assembly for the front or rear wheel of a motorcycle including a brake disc having pairs of projections located on its periphery at 120° intervals. The pairs of projections may be placed on either the outer periphery or the inner periphery of the brake disc. The projections define open ended recesses receiving bosses formed integrally with the wheel hub, and partially surrounded by hardened retainers and structural members. A bolt threaded into each boss prevents disassembly of the bosses and recesses but is not subjected to forces caused by thermal expansion of the brake disc during braking. One or more hydraulically activated stationary calipers clamp non-rotary brake pads frictionally against opposite faces of each brake disc. Provisions are made for cooling the brake disc by atmospheric air.

Wear indicating device for brake pads

Abstract: The feeder cable 70 of a wear indicator device for brake linings 54 of a spot-type disc brake with a floating caliper 12 is guided to prevent damage in a trough 72 of a 62 Anpressteges Beragniederhaltefeder 60th The well is covered by a sheet metal part 74th

Disc brake apparatus

Abstract: In a disc brake apparatus mounted to a vehicle wheel supported by a fork member, a caliper body is disposed within a space formed inwardly of the fork member and to one side of the vehicle wheel. The caliper member straddles the brake disc from the internal periphery of the brake disc. A bracket integrally formed with the caliper body extends inwardly therefrom in a radial direction to the axle of the wheel where it is pivotally supported. The caliper body is also coupled by a removable pin with the fork member to prevent rotation about the axle. The caliper body is formed with an opening for permitting removal and replacement of the friction pads through the bottom wall portion thereof and the bracket is also formed with an opening for permitting the pads to be fully removed from the vehicle.

Disk brake devices

Abstract: The invention relates to a disk brake device (100) which makes use of the excellent heat insulation of zirconia based ceramics material to effectively insulate braking heat generated during braking, thereby avoiding any increase in the temperature of the brake fluid contained in a hydraulic chamber (114), and is characterised in that a coating layer (138) of said zirconia based ceramics material is provided on at least one of the opposed surfaces of the brake pads (130) and the engaging members (112, 118) which urge the brake pads into braking engagement with the brake disk (120).

Pneumo-hydraulic converter for disc brake callipers

Abstract: Pneumo-hydraulic converter for disc brake callipers, particularly for commercial vehicles, comprising a body intended for application directly to a brake calliper or in the immediate vicinity thereof and having a central axis cavity in which there is sealingly slidable a first piston to which is fixed a second piston sealingly slidable in a pneumatic chamber formed at one end of the body and connected at one end to a pressurized air supply and containing a biassing spring for the first and second pistons at its opposite end. The first piston is operatively associated with a hydraulic chamber formed at the other end of the body and defined by a hollow slider guided axially within the body and intended to operate the brake calliper, and the hydraulic chamber is connected to a hydraulic fluid reservoir.

Wheel cover for vehicle

Abstract: A small vehicle equipped with a disk brake system wherein a wheel cover for a wheel of said small vehicle includes a first pair of left and right annular first covers, this first pair having a plurality of air exhaust ports arranged in a peripheral direction, being fixed to walls of a wheel rim to which a wheel spoke section is connected, and extending generally toward the axis of the axle of this wheel; and a second pair of left and right second covers, this second pair having air intake ports capable of receiving air while the wheel is rotating, being connected with wheel supporting means, and covering, in cooperation with the first covers, both sides of the wheel, including brake caliper means associated therewith, and forming inner chamber housing portions of this wheel.

Integrated dual brake mechanism

Abstract: A dual brake mechanism for a vehicle having a first disc brake assembly associated with a first output drive member and a second disc brake assembly associated with an opposite second output drive member includes a primary brake actuator for generating a force engaging the first disc brake assembly and a plurality of push elements for mechanically transmitting that force as a reaction laterally to the second disc brake assembly and simultaneously engaging both. The primary brake actuator features a single actuation chamber for providing the engagement force when pressurized. This avoids the full duplication of componentry at the opposite sides of the vehicle. The dual brake mechanism can be compactly integrated with a steering differential and a secondary parking brake actuator.

Disc brake assembly with parking brake mechanism

Abstract: A disc brake assembly includes a caliper member, a piston axially slidably disposed within a cylinder body of the caliper member to be actuated by hydraulic fluid under pressure, and a parking brake mechanism assembled within the cylinder body to actuate the piston in its operation.

Brake shoe for a spot-type disc brake

Abstract: A brake shoe for a spot-type disc brake has a lining back plate (6) on which is secured a friction lining (16), the lining back plate having a section (12), in particular a section extending radially outwards which is free of friction lining, and which carries a spring (4) which can be supported against part of the disc brake, and the section free of friction lining forming a recess (14) into which the spring engages. To allow the brake shoe to be used in different disc brakes, that part of the section free of friction lining which has the recess (14, 54) is arranged offset in the axial direction towards the friction lining (16) relative to the rest of the back plate (6).