Provided is a centrifugal clutch configured so that a clutch weight can be smoothly displaced without interference with backward displacement of the clutch weight in a rotary drive direction of a drive plate and assist thrust can be stably generated. A centrifugal clutch 200 includes, through swing support pins 214, clutch weights 230 on a drive plate 210 to be rotatably driven by drive force of an engine, and includes plate-side cam bodies 218 and dampers 221. The clutch weight 230 turnably displaces to a clutch outer 240 side through the swing support pin 214, and includes a weight-side cam body 235 configured to climb on the plate-side cam body 218 and a damper groove 236. The damper groove 236 is formed such that a groove width W2 for fitting the damper 221 when the clutch weight 230 is at a clutch-ON position is wider to a front side in a rotary drive direction of the drive plate 210 than a groove width W1 for fitting the damper 221 when the clutch weight 230 is at a clutch-OFF position.

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 clutch for an in-wheel motor includes a hub bearing coupled to a driving wheel and integrally rotated therewith, and formed in a cylindrical shape to provide a seating space therein; a drive shaft positioned in the seating space in a state of being spaced apart from an inner circumferential surface of the hub bearing, connected to a driving part to be rotated by rotational force of the driving part, and provided with a contact part on an outer circumferential surface of a first end of the drive shaft extended in a longitudinal direction; and a plurality of linings positioned inside the seating space on an outer side of the contact part and coupled to the hub bearing to be movable in a circumferential direction.

An electrical submersible well pump assembly (ESP) has a spring brake having helical turns mounted between the shaft and one of the housings. The spring brake allows free rotation of the shaft in a driving direction and stops the shaft from rotating in a reverse direction. The spring brake may have one end be affixed to the housing to rotate in unison in both directions. Alternately, the spring brake may have one end affixed to the shaft for rotation with the shaft. Further, the spring brake could be free of being connected to either the shaft or the housing. A shear member may be mounted between the shaft and the housing to prevent any rotation of the shaft during run-in.

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

A centrifugal clutch of a transport refrigeration unit incorporating a wear limiter is provided. The centrifugal clutch includes a drum, a hub, at least two friction pad assemblies, and at least one spring (e.g., leaf or coil) between each respective friction pad assembly. The wear limiter may be configured as part of the leaf spring, as part of the friction pad assemblies, and/or as a standalone component. The wear limiter is configured to prevent the radially outward facing surface of at least one friction pad assembly from engaging the internally facing surface of the drum when the centrifugal clutch is in the extended position and the friction material of at least one friction pad assembly is worn to a worn thickness. This may prevent the centrifugal clutch from engaging when the friction pad is worn.

A centrifugal clutch of a transport refrigeration unit incorporating a wear limiter is provided. The centrifugal clutch includes a drum, a hub, at least two friction pad assemblies, and at least one spring (e.g., leaf or coil) between each respective friction pad assembly. The wear limiter may be configured as part of the leaf spring, as part of the friction pad assemblies, and/or as a standalone component. The wear limiter is configured to prevent the radially outward facing surface of at least one friction pad assembly from engaging the internally facing surface of the drum when the centrifugal clutch is in the extended position and the friction material of at least one friction pad assembly is worn to a worn thickness. This may prevent the centrifugal clutch from engaging when the friction pad is worn.

Provided is a reverse input blocking clutch capable of easily releasing a state in which rotation of an output member is prevented or suppressed.

The reverse input blocking clutch 5 includes an input member 14, an output member 15, a pressed member 16, and an engaging member 17. When a rotational torque is inputted to the input member 14, the engaging member 17 moves in a direction away from a pressed surface 28 of the pressed member 16 due to engagement with the input member 14, and transmits the rotational torque inputted to the input member 14 to the output member 15 due to engagement with the output member 15; and when rotational torque is reversely inputted to the output member 15, moves in the direction closer to the pressed surface 28 based on engagement with the output member 15, and by being pressed against the pressed surface 28 does not transmit the rotational torque reversely inputted to the output member 15 to the input member 14, or transmits only part thereof to the input member 14 due to engagement with the input member 14.

Provided is a reverse input blocking clutch capable of easily releasing a state in which rotation of an output member is prevented or suppressed.

The reverse input blocking clutch 5 includes an input member 14, an output member 15, a pressed member 16, and an engaging member 17. When a rotational torque is inputted to the input member 14, the engaging member 17 moves in a direction away from a pressed surface 28 of the pressed member 16 due to engagement with the input member 14, and transmits the rotational torque inputted to the input member 14 to the output member 15 due to engagement with the output member 15; and when rotational torque is reversely inputted to the output member 15, moves in the direction closer to the pressed surface 28 based on engagement with the output member 15, and by being pressed against the pressed surface 28 does not transmit the rotational torque reversely inputted to the output member 15 to the input member 14, or transmits only part thereof to the input member 14 due to engagement with the input member 14.