A configuration of a direct drive lawnmower spindle assembly to protect sensitive electric motor components is provided. A spindle shaft of the spindle assembly is supported by upper and lower bearings. An upper end of the spindle shaft is mounted to a rotor of the electric motor and a lower end of the spindle shaft extends through the clearance opening. The lower bearing is supported by a lower bearing carrier that is mounted to the bottom of the spindle housing. The lower bearing can be serviced by removing the lower bearing carrier. A clearance gap between the spindle shaft and the clearance opening is sufficiently small to limit spindle shaft tipping to a degree that will not damage the motor. The invention also provides a friction coupling system for coupling a blade with the rotating spindle shaft.

A structural concept of a drive for an actuation device in a drive train of a motor vehicle, contains an electric motor with a motor housing shell, a circuit carrier with a control unit for controlling the electric motor, and an output shaft of a gearbox with a gearbox housing shell. The rotor shaft of the electric motor is arranged axially with respect to the output shaft of the gearbox, and the rotor shaft of the electric motor is accommodated in the output shaft in a rotatably mounted manner in the region of the gearbox housing shell. The circuit carrier is arranged between the electric motor and the output shaft of the gearbox, and the rotor shaft leads through a cutout in the circuit carrier.

The application is a motor capable of reducing vibration. A motor includes a shaft, a pair of bearings, a sleeve accommodating the pair of bearings, a magnet fixed at one of the shaft and sleeve, a coil fixed at the other of the shaft or the sleeve and opposing the magnet, and an elastic member disposed between the pair of bearings and satisfying Expression 1. D is an outer diameter [m] of the elastic member, d is a wire diameter (p [m] of the elastic member, γ is a unit volume weight [kg/m.sup.3] of a material of the elastic member, S is a no-load rotation number [rotation/min] of the shaft, and g is gravitational acceleration.

[00001]$\begin{array}{cc}S<\frac{20d\sqrt{\frac{\mathrm{gG}}{2\gamma }}}{{\pi D}^2}& \left(1\right)\end{array}$

In a rotating electric machine system, a rotating shaft of a rotating electric machine includes a first end part and a second end part. The first end part includes a projecting distal end that projects out to the exterior of a rotating electric machine housing. A rotational parameter detector is disposed on the projecting distal end. Electric terminal portions electrically connected to the rotating electric machine are disposed at one end part of the rotating electric machine housing. When viewed from a side along an axial direction of the rotating electric machine system, the electric terminal portions and the rotational parameter detector are arranged in parallel.

The invention proposed damper protection for direct drive motor angle limits This mechanism includes main components: Assembly guideway-spring, and Assembly angle limit bar, and Assembly direct-drive motor. The content mentioned in the invention describes the damping spring integrated inside the direct motor to protect the device when operating within the desired stroke limit It can be applied to high-precision devices and motors. The invention's products can be applied in Direct-drive motor mechanisms that limit rotation angle with high-accuracy such as robotic arms, multi-sensor automatic observation devices, or unmanned equipment.

What is new within this engine in th field of the magnetic engine is that it uses the ball bearing gear piston as the catalyst to make the engine work, by this we mean that the ball bearing gear piston is the workhorse of the engine being that it moves to push down the piston to turn the crank.

What is new within this engine in th field of the magnetic engine is that it uses the ball bearing gear piston as the catalyst to make the engine work, by this we mean that the ball bearing gear piston is the workhorse of the engine being that it moves to push down the piston to turn the crank.

An electromechanical cylinder contains a casing, an actuating rod mounted so as to be able to move longitudinally relative to the casing, an electric motor provided with a rotating rotor shaft, a mechanism for transforming a rotational movement of the rotor shaft of the electric motor into a linear translational movement of the actuating rod, and at least one bearing for guiding the rotor shaft of the electric motor in rotation relative to the casing and for supporting the rotor shaft. The cylinder further contains a sleeve that is fastened to the casing and inside which is mounted the bearing, and at least one load sensor that is mounted on the sleeve while being offset axially relative to the bearing.

To prove a motor capable of suppressing labor and costs even when the motor may be subjected to a large impact be used for a floating mobile body such as a drone. The motor (1) includes a shaft (41), a cartridge (4) including a plurality of bearings (42) that support the shaft (41), and a sleeve (43) that surrounds the bearings (42), and a housing (5) including a bottom portion (51) for receiving an impact from outside and an attaching portion (54) provided in the bottom portion (51). The bottom portion (51) of the housing (5) extends in a direction intersecting with respect to a longitudinal direction of the shaft (41), and the cartridge (4) is removably attached to the attaching portion (54).

A stator of an electric motor is rotated and a rotational force of the stator is used for a rotation of a rotor. Thus, the electric motor capable of obtaining high output is provided. A stator 40 is rotated in electric motors 80a, 80b. When rotating a rotor 30, a rotational force of the stator 40 is used for a rotation of the rotor 30. Consequently, higher output can be obtained compared to the conventional electric motor. In addition, the rotational force of the rotor 30 is accumulated as the rotational force of the stator 40 as kinetic energy. In case of a restarting or the like, since the rotational force of the stator 40 is used for the rotation of the rotor 30 as the kinetic energy, the energy loss is small and the kinetic energy of the rotor 30 and the stator 40 can be efficiently used. In addition, in the operation area where the stator 40 is rotated, counter electromotive force Ke or inductive reactance XL applied to coils 42 is reduced. Consequently, the loss is suppressed and the supply power can be efficiently used.