In an aspect, a power transfer device, such as a decoupler, is provided for transferring torque between a shaft and a belt. The device includes: a hub configured to 5 couple to the shaft, a pulley rotatably coupled to the hub that includes a power transmitting surface configured to engage the belt, an isolation spring to transfer a rotational load from one of the pulley and the hub to the other of the pulley and the hub, optionally a one-way clutch to permit overrunning of one of the pulley and the hub relative to the other of the pulley and the hub in a first direction, and a damping member 10 positioned to be driven into frictional engagement with a friction surface by a force from the isolation spring acting on the damping member that varies based on the rotational load transferred by the isolation spring.

A milling machine for milling a surface of a roadway includes a frame and a milling assembly having a cutter drum that is mounted for rotation with respect to the frame. The cutter drum has a drive shaft on which a sheave is mounted. A primary drum drive assembly is adapted to rotate the cutter drum with respect to the frame. The primary drum drive assembly includes a drive belt that cooperates with the sheave on the drive shaft for the cutter drum to rotate the cutter drum. A belt lift assembly may be operated to selectively disengage the drive belt from the sheave of the drive shaft for the cutter drum.

A cyclonic separating device for an upright vacuum cleaner and an upright vacuum cleaner with the same are disclosed. The cyclonic separating device includes a dirt cup, a filter and a cyclonic cone assembly. The filter is disposed in the dirt cup and includes a filter inlet and a filter outlet communicating between the filter inlet and an air outlet. The cyclonic cone assembly includes a cyclone cylinder and a cyclonic guide, in which a first end of the cyclone cylinder is communicated with an air inlet, and the cyclonic guide is fitted in a second end of the cyclone cylinder and is detachably fitted over the filter to spirally guide dirty air introduced into the cyclone cylinder from the air inlet to the filter inlet.

A self-propelled filling pipe for a liquid manure spreader has a frame, an elongated pipe on the frame having a lower inlet end and an elevated outlet end, at least two wheels mounted on the frame, a caster wheel mounted on the elongated pipe proximate the lower inlet end and a fluid drive system. The fluid drive system includes a hydraulic pump, a first hydraulic circuit connecting the hydraulic pump to a plurality of hydraulic motors drivingly connected to the wheels. The fluid drive system also includes a second hydraulic circuit connecting the hydraulic pump to a hydraulic motor operatively connected to the caster wheel. A prime mover provides power to the hydraulic pump to power the hydraulic motors to rotate the caster wheel thereby steering the filling pipe and/or to drive the wheels thereby propelling the filling pipe on the ground.

An upright vacuum cleaner (1) includes a brushroll assembly (100) having a brushroll casing (12) and a brushroll (11); a motor assembly (200) having a motor housing (21) and a motor (22); a body assembly (300) having a body (31) and a bridging member (32), in which the bridging member (32) is pivotally connected to the motor housing (21) to make the body (31) rotatable between an upright position and an oblique position; and an elastic assembly (4) provided between the brushroll casing (12) and the bridging member (32), and configured to be pressed downward against the brushroll casing (12) by the bridging member (32) when the body (31) rotates from the upright position to the oblique position.

A floor brush assembly for an upright vacuum cleaner (1) and an upright vacuum cleaner (1) with the same are disclosed. The floor brush includes a brushroll (11); a motor (22) driving the brushroll (11) to roll via a drive belt (13) that is winded upon a motor shaft (221) of the motor (22) and a central part of the brushroll (11); and a brushroll casing (12) provided outside the brushroll (11), having a dust suction port and defining a brushroll air-suction channel (122) and a drive-belt mounting chamber (123) for mounting the drive belt, in which the brushroll air-suction channel (122) comprises a first air-suction channel (1221) and a second air-suction channel (1222) located at both sides of the drive-belt mounting chamber (123).

A clutch device for an upright vacuum cleaner and an upright vacuum cleaner having the same are provided. The clutch device is disposed between an electric motor assembly and a machine body assembly of the upright vacuum cleaner, the electric motor assembly includes an electric motor housing and an electric motor, the machine body assembly includes a machine body and a bridging member rotatably connected to the electric motor housing. The clutch device includes a slide chute; and a triggering member having a first end provided with a sliding column slidably fitted in the slide chute and a second end provided with a toggling rod configured to stir the electric motor to move. When the bridging member drives the slide chute to move, the sliding column slides along the slide chute to rotate the triggering member. When the triggering member rotates, the toggling rod stirs the electric motor to rotate.

In an aspect, a clutched device is provided, including a hub, a pulley and a hub drive clutch. The hub defines an axis and is connectable to a rotatable shaft of a rotary device. The pulley is rotatable relative to the hub and is engageable with an endless drive member. The hub drive clutch is a wrap spring clutch and is controllable to operatively connect the pulley to the hub for driving the hub in a first rotational direction. An isolation spring is provided and operatively connects the hub to the pulley when the hub drives the pulley in the first rotational direction. Optionally, a pulley overrun clutch is provided and permits the pulley to overrun the hub in the first rotational direction.

In an aspect, a method is provided for controlling a clutch assembly having first and second rotatable clutch members. The method includes providing a wrap spring clutch having first and second ends. The phase angle between the first and second ends determines a diameter of the wrap spring clutch. One of the clutch members is connected with the first end. The method further includes obtaining a target value indicative of a target speed for the second clutch member, and determining through measurement an actual value that is indicative of an actual speed of the second clutch member. The method further includes changing the phase angle between the first and second ends of the wrap spring clutch to generate a selected amount of slip between the wrap spring clutch and the other of the first and second clutch members, based on the target value and the actual value.

A decoupler is provided for rotationally driving a generator of an auxiliary-unit belt drive of an internal combustion engine, including: a pulley, a hub, and two bearing points, at which the pulley is rotatably supported on the hub, a series arrangement of a helical torsion spring and a one-way clutch, which allows the hub to overtake the pulley, and a spring plate, which is rotationally fixed in relation to the pulley or the hub, for the one spring end and a spring plate, which can be rotated in relation to the pulley and the hub, for the other spring end. The spring ends, which lie against ramp steps of the spring plates, radially expand the helical torsion spring as the driving torque is transmitted. The frictional torque, produced in one of the bearing points when the hub is overtaking, acts on the rotatable spring plate in a direction of rotation of the rotationally fixed spring plate. The other bearing point, according to the invention, has a part that is rotationally fixed in relation to the rotationally fixed spring plate, on which part the rotatable spring plate is supported, a further frictional torque thus being produced, which acts on the rotatable spring plate in the direction of rotation of the rotationally fixed spring plate.