An agricultural header includes: a header frame; at least one cutting unit carried by the header frame and including a cutting element and a driveshaft coupled to the cutting element; and a gearbox configured to drive the cutting element. The gearbox includes a gearbox output rotatably coupled to the driveshaft; and a clutch including an intermediate shaft and at least one clutch shoe rotatably coupled to the intermediate shaft and displaceable between a non-engaging position where the at least one clutch shoe does not engage the gearbox output and an engaging position where the at least one clutch shoe engages the gearbox output. The clutch is configured such that the at least one clutch shoe displaces to the engaging position when a rotational speed of the intermediate shaft reaches a threshold value.

An agricultural header includes: a header frame; at least one cutting unit carried by the header frame and including a cutting element and a driveshaft coupled to the cutting element; and a gearbox configured to drive the cutting element. The gearbox includes a gearbox output rotatably coupled to the driveshaft; and a clutch including an intermediate shaft and at least one clutch shoe rotatably coupled to the intermediate shaft and displaceable between a non-engaging position where the at least one clutch shoe does not engage the gearbox output and an engaging position where the at least one clutch shoe engages the gearbox output. The clutch is configured such that the at least one clutch shoe displaces to the engaging position when a rotational speed of the intermediate shaft reaches a threshold value.

A leaf spring for a centrifugal clutch of a transport refrigeration unit, and a centrifugal clutch incorporating the leaf spring are provided. The centrifugal clutch includes a drum, a hub, at least two friction pads, and at least one leaf spring between each respective friction pad. The leaf spring includes a frame and an indicator tab. The indicator tab of the leaf spring is configured to indicate when at least one friction pad of the centrifugal clutch is in need of replacement. This indication may be in the form of an audible sound generated when the indicator tab engages the internally facing surface of the drum. The indicator tab may be configured to only be able to engage the internally facing surface of the drum when the friction material of the friction pad has a thickness suggesting it is worn.

A leaf spring for a centrifugal clutch of a transport refrigeration unit, and a centrifugal clutch incorporating the leaf spring are provided. The centrifugal clutch includes a drum, a hub, at least two friction pads, and at least one leaf spring between each respective friction pad. The leaf spring includes a frame and an indicator tab. The indicator tab of the leaf spring is configured to indicate when at least one friction pad of the centrifugal clutch is in need of replacement. This indication may be in the form of an audible sound generated when the indicator tab engages the internally facing surface of the drum. The indicator tab may be configured to only be able to engage the internally facing surface of the drum when the friction material of the friction pad has a thickness suggesting it is worn.

A torque converter is disclosed. The torque converter includes a cover, an impeller, a turbine, a stator, and a first one-way clutch. A torque outputted from a prime mover is inputted to the cover. The impeller is unitarily rotated with the cover. The turbine is opposed to the impeller. The stator is disposed between the impeller and the turbine. The first one-way clutch is configured to make the cover rotatable relative to the turbine in a forward rotational direction. The first one-way clutch is further configured to rotate the cover unitarily with the turbine in a reverse rotational direction.

A garden tool power system comprises a motor, a reducer and a transmission shaft. The motor transmits the power to the transmission shaft through the reducer to drive wheels on the transmission shaft. The reducer comprises a pinion connected to an output end of the motor and a gear engaged with the pinion. The transmission shaft includes left and right shafts connected with each other through a connecting shaft. The gear mounted on the connecting shaft has at least two guiding rods transversely located thereon and two centrifugal blocks located between the guiding rods. Each guiding rod has a spring surrounded therearound and each spring located between two centrifugal blocks has two opposite ends respectively abutted against the corresponding portions of the centrifugal blocks. A fixing sleeve provided on the periphery of the centrifugal blocks is mounted on the transmission shaft and has buckle structures matching with the centrifugal blocks.

A garden tool power system comprises a motor, a reducer and a transmission shaft. The motor transmits the power to the transmission shaft through the reducer to drive wheels on the transmission shaft. The reducer comprises a pinion connected to an output end of the motor and a gear engaged with the pinion. The transmission shaft includes left and right shafts connected with each other through a connecting shaft. The gear mounted on the connecting shaft has at least two guiding rods transversely located thereon and two centrifugal blocks located between the guiding rods. Each guiding rod has a spring surrounded therearound and each spring located between two centrifugal blocks has two opposite ends respectively abutted against the corresponding portions of the centrifugal blocks. A fixing sleeve provided on the periphery of the centrifugal blocks is mounted on the transmission shaft and has buckle structures matching with the centrifugal blocks.

A pump group for a cooling system of an engine of a vehicle, of the dual type is provided. The pump group includes an impeller mounted on a shaft commandable in rotation by an electric drive and a mechanical drive. The mechanical drive includes a rotating member commandable in rotation by mechanical movement devices in the vehicle, a rotary drum operatively connected to the shaft, a centrifugal clutch device including a central body integrally attached to the rotating member and a plurality of engagement elements movably fixed on the central body suitable to translate in a radial direction with respect to the axis (X-X) to engage the rotary drum.

A pump group for a cooling system of an engine of a vehicle, of the dual type is provided. The pump group includes an impeller mounted on a shaft commandable in rotation by an electric drive and a mechanical drive. The mechanical drive includes a rotating member commandable in rotation by mechanical movement devices in the vehicle, a rotary drum operatively connected to the shaft, a centrifugal clutch device including a central body integrally attached to the rotating member and a plurality of engagement elements movably fixed on the central body suitable to translate in a radial direction with respect to the axis (X-X) to engage the rotary drum.

Provided is a centrifugal clutch configured so that assist thrust can be maintained constant or can be decreased even when a clutch shoe is abraded. The centrifugal clutch 200 includes a drive plate 210 to be rotatably driven by drive force of an engine. The drive plate 210 includes each of swing support pins 214 and the plate-side cam bodies 218. The swing support pin 214 is fitted in a long-hole-shaped pin slide hole 231 formed at a clutch weight 230 to swingably support the clutch weight 230. The plate-side cam body 218 includes a cylindrical roller, and a weight-side cam body 235 of the clutch weight 230 contacts the plate-side cam body 218. The weight-side cam body 235 is formed as such a curved surface that a cam angle when a clutch shoe 233 contacts a cylindrical surface of a clutch outer 240 is the same between before and after abrasion of the clutch shoe 233 progresses.