An electrically driven eccentric weight industrial vibrator comprises a housing, a stator, a rotor, and at least one eccentric weight. The housing defines an internal chamber. The stator is positioned within the internal chamber of the housing and is fixed in rotation relative to the housing. The rotor encircles the stator and is rotationally connected to the stator and the housing in a manner such that the rotor is able to revolve around the stator within the internal chamber of the housing. The eccentric weight is mounted to the rotor in a manner such that the eccentric weight is able to revolve about the stator together with the rotor.

A remote controlled vibration imparting device for a concrete finishing tool includes a case that attaches to a float using standard bolt layouts. A motor housing is suspended in and attached to the case, and the motor housing partly surrounds a vibrator with a support, a rotor with a shaft and weighted body, a bi-directional motor, and a coupler between the shaft and the motor. Also in the case are a variable speed controller and a remote switch, both of which are electrically connected to the motor and a battery located on or in the case. The case further includes a removable lid that attaches to a concrete finishing tool.

An actuator for generating vibration, including a middle supporter to form a first space; a shaft provided in the middle supporter and exposed in the first space; a circuit board having a driving coil and a hollow formed through the middle supporter; a housing having an inner space formed to accommodate the middle supporter and the circuit board so that the circuit board is fixed thereto; a first yoke plate having a first magnet installed to face an upper surface of the driving coil and fixedly coupled to an upper portion of the middle supporter; a second yoke plate having a second magnet installed to face a lower surface of the driving coil and fixedly coupled to a lower portion of the middle supporter; and a weight installed to at least one of the first and second yoke plates.

This vibration generation device includes a rotor that is configured to be rotatable about a rotation axis, the rotor including a weight having a center of gravity that is eccentric with respect to the rotation axis; a shaft that is inserted into the rotor and configured to rotatably support the rotor; and a restriction part that is disposed further inward than the weight in a radial direction, the restriction part being attached to one end of the shaft, and the restriction part restricting a movement of the rotor in an axial direction.

A BLDC vibrational motor is provided, which is improved so as to generate a larger vibrational force per same volume compared to prior arts. A cylindrical bearing is fixed to a doughnut-shaped permanent magnet directly so that the magnet can be disposed as close as possible to the center of rotation, and thus coils can have a reduced volume and be disposed as close as possible to the center of rotation. The external space of the coils can be secured larger as much as the movement of position of the coils, and the weight takes up the space for rotation, so that volume of the weight can be enlarged. Thus, the weight can be extended and disposed to the external space of the coils, it is possible for a vibration motor with a small volume to generate a large vibrational force, which facilitates slim designs of the vibrational motor.

The present disclosure provides a vibration device, including a stator, an eccentric wheel and an electromagnetic driving assembly. The eccentric wheel rotates around a rotating shaft relative to the stator. The electromagnetic driving assembly includes at least one magnetic element and an induction coil. The at least one magnetic element is disposed on the eccentric wheel. The induction coil corresponds to the magnetic element, and the induction coil is disposed on the stator. When acurrent is applied to the induction coil, the induction coil acts with the magnetic element to generate an electromagnetic force to drive the eccentric wheel to rotate around the rotating shaft, so that the vibration device generates a vibration. The rotating shaft is disposed on the stator.

There is provided a vibration generation device superior in responsivity compared to the related art. The vibration generation device includes a stator, a rotor provided to the stator so as to be able to rotate around the central axis, and having a weight having a gravity center at a position shifted from the central axis, and an air resistance reduction part provided to the weight, and reducing the air resistance to the weight when the rotor rotates. The weight is formed to have a semicircular shape viewed from the axial direction, and the air resistance reduction part has an arcuate part adapted to connect an end edge on the upstream side in the rotational direction of the rotor in the outer circumferential surface of the weight and an end edge on the downstream side in the rotational direction to each other so as to form a circular arc shape.

An actuator includes a housing, a moving element and two springs connected between the housing and the moving element such that one of the two springs crosses the other of the two rotor springs without contacting the other of the two springs. A drive component causes the moving element to move.

An example compaction machine is provided that includes a compaction plate and a housing disposed on the top surface of the compaction plate. The compaction machine may also include an imbalance mass disposed within the housing and affixed to an imbalance mass shaft. The compaction machine may further include a first electric motor affixed to the housing and operably coupled to the imbalance mass shaft, and a second electric motor affixed to the housing and operably coupled to the imbalance mass shaft. The first electric motor and the second electric motor may be axially aligned along a shaft axis and affixed to the housing on opposite sides of the housing.

An electrically driven eccentric weight industrial vibrator comprises a housing, a stator, a rotor, and at least one eccentric weight. The housing defines an internal chamber. The stator is positioned within the internal chamber of the housing and is fixed in rotation relative to the housing. The rotor encircles the stator and is rotationally connected to the stator and the housing in a manner such that the rotor is able to revolve around the stator within the internal chamber of the housing. The eccentric weight is mounted to the rotor in a manner such that the eccentric weight is able to revolve about the stator together with the rotor.