A counter-rotating twin shaft gardening system is provided herein. The gardening system includes a drive shaft operably coupled to first and second shafts for driving the first shaft in the first direction and the second shaft in the second direction. A first ground manipulation device is attached to the first shaft. A second ground manipulation device is attached to the second shaft. The first and second ground manipulation devices including a plurality of teeth and a plurality of long arms. The plurality arms extend further outward from a planar portion than the plurality of teeth. A release system is disposed within the drive shaft to reduce or reverse the rotation of the first and second shafts when debris is disposed between the first and second ground manipulation devices. The release system is formed from a first portion and a second portion of the drive shaft.

In one aspect, electric power equipment includes: a horizontally extending left rotary shaft operably connected with a cutter blade operation lever; a horizontally extending right rotary shaft operably connected with a travel operation lever; and a cutter blade on/off switch and a potentiometer for setting a travel speed arranged at a laterally central position substantially between the left and right rotary shafts, such that the cutter blade on/off switch is operated by the left rotary shaft and the potentiometer is operated by the right rotary shaft.

A dirt extraction apparatus for use by a user in a crawlspace of a building to extract dirt and debris is provided. The dirt extraction apparatus includes a housing having an internal conduit with an inlet and an outlet, a plurality of blades rotatably mounted to the housing proximate the inlet, a motor disposed within the housing and operably connected to the plurality of blades, a support handle coupled to the top face of the housing and having a plurality of bars coupled together, and a collection assembly coupled to the outlet of the housing. Any bar of the support handle is grabbed by the user to maneuver the apparatus within the building crawlspace, thereby enabling the rotating blades to evacuate the dirt and debris from the ground surface through the internal conduit of the housing to the collection assembly.

In one aspect, power equipment includes a cutter blade operation lever, a left rotary shaft, an operated member operated by the left rotary shaft to control driving of a cutter blade, and a releasable engagement mechanism provided between the left rotary shaft and the cutter blade operation lever. The releasable engagement mechanism is configured to release a force transmitting engagement between the cutter blade operation lever and the left rotary shaft to allow the cutter blade operation lever to rotate relative to the left rotary shaft when an excessive force is applied to the cutter blade operation lever in a direction to rotate the left rotary shaft beyond a normal rotational angle range.

A rotary tiller comprises a frame, a cylindrical drum rotatable relative to the frame, a plurality of tines extending from the cylindrical drum, a motor at least partially disposed within the cylindrical drum, wherein the motor is configured to rotate a motor output member, and a transmission at least partially disposed within the cylindrical drum and configured to engage the motor output member. The transmission is operable to drive rotational movement of the cylindrical drum.

A wheel assembly is for a unitractor. The wheel assembly has a wheel, a static hub and an internal electrical motor. The wheel has a rim, a traction member arranged to the periphery of the rim and a plurality of magnets arranged to the inside of the rim. The hub has a stator having spherical windings. The wheel is rotatably connected to the hub via at least one bearing. At least one side panel extends from the rim and to the at least one bearing. At least one of an energy source and a controller for controlling the energy source is positioned in the hub. The hub is provided with a coupling member for an implement frame. A unitractor having the wheel assembly is also described.

A multi-functional garden implement comprises an underframe connected with a supporting shaft. A pushing handle is fixedly connected to the underframe, and wheels are connected with the supporting shaft. The multi-functional garden implement further comprises a rotating bracket, which is connected to a power source. A working head is connected to the power source. The rotating bracket is rotatably connected to the underframe and capable of driving the working head to swing to both sides back and forth. Between the underframe and the rotating bracket, there is also a locating mechanism which can secure the rotating bracket onto the underframe. The multi-functional garden implement is capable of adjusting the position of the working head, so as to meet various requirements for the working conditions of gardening work.

Walk-behind power equipment includes: a main body provided with at least one front wheel and left and right rear wheels and a work unit; travel motors provided for the respective rear wheels; a handle extending from the main body rearward and upward; at least one of a tilt angle detector that detects a tilt angle of the main body and a load detector that detects a downward load applied to the handle; a yaw rate detector that detects a yaw rate; and a control unit that drive-controls the travel motors. The control unit determines whether the main body is in a rearward tilted state based on the tilt angle or the downward load, and if it is determined that the main body is not in the rearward tilted state, performs straight-line travel control to set a rotational speed difference between the travel motors to reduce the yaw rate.

A rotary tiller comprises a frame, a cylindrical drum rotatable relative to the frame, a plurality of tines extending from the cylindrical drum, a motor at least partially disposed within the cylindrical drum, wherein the motor is configured to rotate a motor output member, and a transmission at least partially disposed within the cylindrical drum and configured to engage the motor output member. The transmission is operable to drive rotational movement of the cylindrical drum.

A working machine may work by moving frontward on a ground. The working machine may include: a battery; an electric motor comprising a stator and a rotor and configured to be driven by electric power supplied from the battery; a working unit configured to work on the ground by being rotated about a rotary axis by the electric motor, the rotary axis being substantially parallel to a virtual ground perpendicular to an up-down direction; and a transmitting unit configured to transmit rotation of the electric motor to the working unit. When the working machine is viewed from a front side with the working machine being in a working posture, the battery, the electric motor, and the working unit may be separate from each other in the up-down direction and the working unit may be disposed below the battery and the electric motor.