Abstract:
Eine Feststellbremsvorrichtung (10) für ein Nutzfahrzeug, welches mit einer druckluftbetätigbaren Betriebsbremse ausgestattet ist, ist so gestaltet, dass die Betätigungsenergie für die Feststellbremsvorrichtung (10) gegenüber einer Ausführung mit einem Federspeicherbremszylinder verringert wird, wobei jedoch der Bauraum im Radbereich minimiert ist. Dabei bestehen die Hauptfunktionsteile der Feststellbremsvorrichtung (10) aus einem Innenring (13), einem Außenring (14), die einen Ringspalt (11) begrenzen, in denen verschiebbare Kegelrollen (12) angeordnet sind. Die Kegelrollen (12) werden entgegen der Wirkung von Druckfedern (16) in die Freigabestellungen gebracht, indem Kegelrollen (12) ausser Kontakt mit den konischen Flächen des Innenringes (13) und des Aussenringes (14) gebracht werden.
Abstract:
Brems- und Kupplungsanordnung (1) zum Herstellen entweder einer bremsmomentbehafteten oder drehfesten Verbindung zwischen einem rotierenden Element (6) und einem relativ zu diesem drehfest angeordneten Übertragungselement (4), wobei das rotierende Element (6) über ein Untersetzungsgetriebe (10, 18) mit einem ersten rotierenden Bremselement (24) in Antriebsverbindung steht, das mit einem relativ zu diesem drehfest angeordneten, zweiten Bremselement (32) in reib- und/oder formschlüssigen Eingriff bringbar ist.
Abstract:
A brake (10) for a servo-motor (96) includes a housing (28) having first and second housing portions (30, 32) and in which an input (12) is rotatably mounted by a bearing (60). The pilot (98) of the servo-motor (96) is received in an enlarged recess (40) while the shaft (21) passes through an axial opening (38) and is secured in an axial bore (20) of the input (12) by a coupling (106) to align the brake (10) with the servo-motor (96). The brake (10) is secured to the servo-motor (96) by screws (108) which extend through elongated, radially elongated slots (46). A wedge shaped friction facing (82) is biased to engage an interface surface (26) of the input (12) and a friction surface portion (70) of the housing (28) by a spring (94) extending between a radial surface (92) and the first housing portion (30). The friction facing (82) is moved to a disengaged position by a piston (100) slideable under fluid pressure in a chamber (62) of the second housing portion (32).
Abstract:
A clutch mechanism (25) is provided for a cooling fan (23) of a size capable of fitting into the limited envelope available in an over-the-road diesel tractor. A compact housing (43) has a belt drive input and an output (26) connected to the fan hub (45). The housing (43) includes a pressure chamber (102) in fluid communication with a pressurized air supply and a controllable valve in the air supply line for regulating the pressure in the pressure chamber (102) when the clutch (20) must be operated. The air pressure actuates an internal piston (86) to translate the clutch (20) in a continuously variable manner between engaged and disengaged conditions. A small envelope clutch, having an outer diameter less than about 9.8 inches in diameter within the fan hub (45) and less than about 6 inches under the belts (27) and 7.3 inches overall so the housing (43) may be positioned between the radiator (22) and the engine (21), is capable of generating 150 foot-pounds or torque, running a 55 horsepower fan at 2100 rpm, and dissipating 10 horsepower of heat while in the slip mode. The clutch also has at least 130 inches in clutch area. Fan speed is controlled utilizing a closed loop control system. The control system is capable of monitoring engine conditions and controlling fluid pressure actuating the clutch assembly (91a) to control the fan speed in response to the engine conditions.
Abstract:
A clutch mechanism (25) is provided for a cooling fan (23) of a size capable of fitting into the limited envelope available in an over-the-road diesel tractor. A compact housing (43) has a belt drive input and an output connected to the fan hub (45). The housing (43) includes a pressure chamber (102) in fluid communication with a pressurized air supply and a controllable valve in the air supply line for regulating the pressure in the pressure chamber (102) when the clutch (20) must be operated. The air pressure actuates an internal piston (86) to translate the clutch (20) in a continuously variable manner between engaged and disengaged conditions. A small enveloppe clutch, having an outer diameter less than about 9.8 inches in diameter within the fan hub (45) and less than about 6 inches under the belts (27) and 7.3 inches overall so the housing (43) may be positioned between the radiator (22) and the engine (21), is capable of generating 150 foot-pounds of torque, running a 55 horsepower fan at 2100rpm, and dissipating 10 horsepower of heat while in the slip mode. The clutch (20) also has at least 130 inches in clutch area. Fan speed is controlled utilizing a closed loop control system. The control system is capable of monitoring engine conditions and controlling fluid pressure actuating the clutch assembly (91A) to control the fan speed in response to the engine conditions.
Abstract:
The invention relates to a slewing mechanism for a grab or similar tool connected to the boom of an excavator or crane. It has a stator (1) connecting to the boom and a rotor (6) connecting to the grab and rotatably mounted to the stator (1) as well as a hydraulic drive mechanism (8) situated on the inside between stator (1) and rotor (6) and pressurized with pressure oil from the stator side. To ensure a directionally stable manipulation of the grab during the operation of the grab and the swivelling of the boom, the invention proposes that a braking or blocking mechanism (9) be disposed in a clear space between stator (1) and rotor (6), with actuation when the pressure oil supply to the drive mechanism (8) is cut off.
Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung eines Ringes (1) einer Synchronisationseinrichtung (2), wobei der Ring (1) eine Reibfläche (3) zum Zusammenwirken mit der Reibfläche (4) eines weiteren Rings (5) der Synchronisationseinrichtung (2) aufweist sowie mindestens eine Gleitfläche (6, 7) zum gleitgelagerten Sitz auf einer Anlagefläche (8). Um ein geringeres Schleppmoment des Rings zu erreichen, sieht die Erfindung vor, dass mindestens eine der Gleitflächen (6, 7) eine Anzahl bogenförmiger Nuten (9, 10) aufweist, die durch einen Wirbeldrehprozess eingebracht werden. Des Weiteren betrifft die Erfindung einen Ring einer Synchronisationseinrichtung.
Abstract:
Die Erfindung betrifft eine mechanische Bremse (1 ) mit einem auf einer Antriebswelle (2) angeordneten axialen Verschiebemechanismus (4) und einem auf einer Abtriebswelle (3) angeordneten axialen Verschiebemechanismus (5), wobei die beiden axialen Verschiebemechanismen (4, 5) so ausgestaltet sind, dass ihre Verschieberichtungen entgegen gesetzt sind und dass bei Einleitung eines Drehmoments über die Antriebswelle (2) und/oder die Abtriebswelle (3) der axiale Verschiebemechanismus (4), der der Antriebswelle (2) zugeordnet ist, Vorrang hat vor dem axialen Verschiebemechanismus (5), der der Abtriebswelle (3) zugeordnet ist.
Abstract:
A coaster brake hub (10) including a housing (26) having a generally cylindrical passage (28) therethrough, an axle (32), a drive shaft (16), a drive cone (64) and a brake (52) mounted within the passage (28). The hub (10) includes a clutch (74) moveable between first and second positions to rotatably interconnect the drive shaft (16) with the brake (52) such that rotation of the drive shaft (16) in a first direction forces the drive cone (64) into engagement with a portion of wall (36) of the passage (28) to rotate the housing (26) in the first direction. Rotation of the drive shaft (16) in the opposite direction rotates the drive shaft (16) in the opposite direction relative to the drive cone (64) such that upon subsequent rotating of the drive shaft (16) in the first direction, the drive cone (64) rotates the housing (26) in the first direction.