530 results about "Centrifugal clutch" patented technology

All all-terrain vehicle has a shiftable transmission that is coupled to a variable speed V-belt transmission. The variable speed V-belt transmission is joined to a crankshaft through a centrifugal clutching arrangement. The shiftable transmission enables an operator to go between low, high, neutral, reverse, and park. In the park position, the transmission is locked from substantial rotation such that the engaged wheels of the all-terrain vehicle are also locked from substantial rotation, whether or not the engine speed is sufficient to allow the centrifugal clutch to be engaged with the variable speed transmission.

A V-belt type continuously variable transmission according to the present invention includes a drive pulley assembly provided in a drive shaft, a driven pulley assembly provided in a driven shaft, a V-belt looped over both the pulley assemblies, and a transmission case assembly housing both the pulley assemblies and the V-belt. One end of the drive shaft in the shaft direction is coupled to an output side rotation member of a centrifugal clutch, and the other end of the drive shaft is rotatably supported on a boss portion formed in the transmission case assembly.

The invention relates to a vehicle throttle anti-misstep brake device. The device comprises a brake pedal, a throttle pedal and a centrifugal clutch; the centrifugal clutch comprises an inner ring and an outer ring, two movable claws are arranged on the inner ring, the movable claws can rotate around pivots, fixed on the inner ring, of the movable claws; the tail end of each movable claw is provided with a limit stop, the middle part of each movable claw is connected with one end of a tensioning spring; and the other end of the tensioning spring is fixed on the inner ring; tooth sockets matched with the claw tips of the movable claws are arranged on the outer ring; the throttle pedal is connected with the inner ring through a first connecting rod; and a throttle pull wire is wound on the inner ring; the brake pedal is connected with the outer ring through a second connecting rod; and the outer ring is connected with a brake cylinder trough a brake pull wire. The vehicle throttle anti-misstep brake device can be used for preventing a driver from stepping the throttle mistakenly when braking and further causing accidents.

A powered rope ascender that supports a person or a load while ascending a vertical rope. The rope ascender has a motor driven capstan drum that engages the rope. A pinch roller grips the rope against the capstan drum. A load limiting assembly releases the grip by the pinch roller when the load supported by the ascender exceeds a predetermined amount. A centrifugal clutch reduces starting torque required by the motor and the outer drum of the centrifugal clutch interacts with a brake to hold position on the rope. For heavy loads a motion activated brake is used. Hand controls provide a freewheeling, a braking and an ascending mode of operation. A harmonic drive or planetary reduction gears provide speed reduction from the motor to the capstan drum. The powered rope ascender can be threaded on the rope without access to a rope end.

A power cutter is disclosed whose dust suction-discharge fan is driven to rotate at a high speed to thereby attain sufficient dust suction-discharge performance, and which can be constructed relatively compactly in size as a whole at a reduced cost. The power cutter includes two rotating operative components (30, 50) driven by a prime mover (5) and a centrifugal clutch (10) operatively connected to the output shaft (7) of the prime mover (5) for rotationally driving the two rotating operative components (30, 50). The centrifugal clutch (10) includes a clutch drum (11) composed integrally of a small diameter pulley portion (21) and a large diameter pulley portion (22). Belt-type drive trains (15A, 16A and 17A, 18A) transmit the rotational drive force to the rotating operative components (30, 50), respectively.

The invention discloses an oil drive variable pitch quadrotor type multifunctional fire-fighting unmanned aerial vehicle, relating to the field of unmanned aerial vehicles. The invention mainly aims at solving the problems that a conventional fire fighting truck is large in fire fighting limitations and the like. The unmanned aerial vehicle comprises a cabin, an undercarriage and an airbag, wherein a fuel tank is arranged in a fuel storage bin; engine arms are arranged outside the cabin; the outer ends of the engine arms are connected with rotor mechanisms; the airbag is arranged at the bottom of an engine of the rotor mechanisms; radiators are arranged on the tops of the engine arms; an power output shaft of each engine is connected with a centrifugal clutch in a reduction box; a driven gear on a main shaft is meshed with a driving gear on the centrifugal clutch; a variable pitch disc is arranged on the main shaft in a sleeving manner; rotor heads are fixed on the main shaft and are connected with the rotors in a clamping mode; the rotors are connected with one another in the clamping mode; a rocker arm of a servo rudder is connected with a connecting rod; the connecting rod is connected with a variable pitch disc shifting fork; a fixing seat is connected with the variable pitch disc shifting fork by virtue of a swing connecting rod; the variable pitch disc shifting fork is connected to the variable pitch disc; a screw pitch is arranged at the horizontal axis of the variable pitch disc and the rear end of a rotor clamp pull rod in the sleeving manner; and the rotor clamp pull rod is fixed on a rotor clamp. The unmanned aerial vehicle has the advantage of being not subjected to space limitation.

An outboard motor is equipped with a centrifugal clutch located between the crankshaft of an engine and a rotor of an electric motor for, when the engine operates, transmitting its output to through the rotor to a propeller, and with a motor output transmission mechanism for, when the engine does not operate, transmitting the output of the motor to the crankshaft. The engine can therefore be started by the motor used to drive the propeller. As a result, there is no need to install a separate electric motor for engine starting, so that starting of the engine by electric power can be made possible with minimum increase in the size and cost of the outboard motor.

A lawn mower comprises an operation arm, a driven shaft rotatably supported inside the operation arm and having two opposite ends, a cutter operatively connected to one end of the driven shaft, a power source operatively connected to the other end of the driven shaft for generating a drive power to be transmitted to the cutter through the driven shaft, wherein said power source is selective from an engine and an electric motor, an arm side joint case provided on the end of the operation arm, a power source side joint case provided on a housing of the power source and detachably and selectively connected to the arm side joint case, and a centrifugal clutch incorporated in the arm side joint case and having a first member connected to the driven shaft, a second member detachably and selectively connected to the power source and a third member provided to engage the first member and the second member according to the centrifugal force applied thereto.

The invention provides a centrifugal clutch and an electric vehicle gear-shifting drive hub with the same, which belong to the technical field of machinery and vehicles. The invention solves the technical problem that conventional electric vehicles are inconvenient to back off. The centrifugal clutch comprises an input part and an output part, and the shaft of the output part is inserted in the axis of the disk of the input part; one side of the disk is provided with a gear ring and pawls in the gear ring, and the gear ring is firmly connected with the output part; the roots of the pawls are articulated with the side of the disk, and the inner wall of the gear ring is provided with ratchets; and restoring mechanisms are arranged between the pawls and the input part. The electric vehicle gear-shifting drive hub comprises a stator, a rotor, a hub body and a central shaft; an input gear shaft and an output gear shaft are sleeved on the central shaft, one end of the input gear shaft is firmly connected with the rotor, and one end of the output gear shaft is connected with the hub body; and an overrunning clutch and the centrifugal clutch are respectively connected between the other end of the input gear shaft and the other end of the output gear shaft. The invention has the advantages of stable transmission, convenience in use and the like.

Problems: For enhanced safety of a work apparatus with an internal combustion engine, a cutting element is prevented from an accidental run due to an accidental increase of the engine revolution while a throttle control trigger is in a released state.

Solution: In an engine start period, a throttle valve (10) is in a first idling position. The engine 2 at its initial run phase does not increase in revolution because of instability of its running condition. When the running condition begins to stabilize, the revolution rapidly increases. When the engine revolution (Ne) reaches 4,000 rpm or higher, a non-firing control mode is set up. In the non-firing control mode, when the engine revolution reaches or exceeds 4,500 rpm, a non-firing processing is executed (S4). A centrifugal clutch (6) is designed to engage at 5,000 rpm.

Continuously variable speed drive (CVT) have improved performance due to use of two groups of flyweight cams, each group being mounted on separate rotational members of a centrifugal clutch. One set of flyweight cams provides force to close the sheaves through the entire movement of the shift, whereas the other set of flyweight cams provides force only through an initial portion of the shift and then signs off. This provides a two stage shift behavior for the CVT that enhances power transfer to the driven pulley.

A turbine engine emergency power system includes low and high pressure spools, the lower pressure spool including a low pressure compressor. A turbofan is coupled to the low pressure spool. The turbofan drives the low pressure spool in a windmill condition in which the low pressure turbine fails to provide rotational drive to the turbofan. A generator is rotationally driven by the low pressure spool in the windmill condition. A gear train is used to increase the speed of the generator in one example. In one example embodiment, a centrifugal clutch is used to selectively decouple the generator from the low pressure spool at a predetermined engine speed, which corresponds to normal operating speeds when the turbine engine is under power.

A clutch assembly for a turning gear includes an overspeed clutch, an output shaft, and a centrifugal clutch. The overspeed clutch is disposed at the input shaft. The output shaft is in mechanical communication with the input shaft via the overspeed clutch. The centrifugal clutch is disposed at a portion of the output shaft.

The invention discloses an electro-thermo-magnetic shape memory alloy and magnetorheological fluid composite centrifugal clutch. The clutch comprises a driving shaft, a driven shaft, a left end cover, a right end cover, an outer cylinder and a driven disc, wherein gaps between the driven disc and the left end cover and between the right end cover and the outer cylinder are filled with magnetorheological fluid; an excitation coil is arranged in two coil grooves respectively; a plurality of friction blocks are distributed on the driven disc and are connected with a push rod respectively; a shape memory alloy spring is arranged between the push rod and the bottom of a push rod groove; an electric brush slide ring sleeves the driven shaft; the excitation coil and the shape memory alloy spring pass through a wire hole and a blind hole through a connecting wire respectively and then are connected with the electric brush slide ring. Composite transmission of the shape memory alloy, the magnetorheological fluid and centrifugal force can be realized to improve the transfer torque of the clutch, so that the transfer efficiency of the clutch is improved.

A transmission M of a vehicular power transmission system has a first shifting part and a second shifting part which shift a power of an internal combustion engine, a first shift clutch transmitting and interrupting the power to the first shifting part, and a second shift clutch transmitting and interrupting the power to the second shifting part. A start clutch transmitting and interrupting the power to the first shift clutch and the second shift clutch is constructed of a centrifugal clutch C having a clutch shoe. The resulting configuration provides a vehicular power transmission system which has excellent efficiency of power transmission and durability, as well as being capable of being manufactured at low cost, and being capable of relieving a start shock.

A trailer dolly includes an internal combustion engine, a transmission providing both forward and reverse drives, and a centralized lifting handle. The internal combustion engine provides much better power and much less weight than electric counterparts. The forward/reverse transmission includes a sliding shaft which engages a select one of two bevel gears with a larger bevel gear to select forward or reverse drive. The sliding shaft slides along with an elongated clutch cylinder of a centrifugal clutch. An alternative transmission uses sprockets and chains to obviate a case to enclose lubricant. Counter-rotating sprockets alternatively engage a dog-tooth gear to select either forward or reverse drive. The lifting handle mounted generally at the center of gravity (with the trailer dolly in a substantially horizontal position) makes single-handed lifting and carrying of the trailer dolly quite easy.