A power tool includes a motor housing, a motor, a handle coupled to the housing, and a vibration damping assembly. The motor is positioned in the motor housing and configured to rotatably drive an output shaft. The vibration damping assembly is positioned between the motor housing and the handle. The vibration damping assembly includes a first coupling portion defined by the motor housing, a second coupling portion defined by the handle, and an elastomeric damper captured between the first coupling portion and the second coupling portion. The first coupling portion includes a boss having a flange and a first groove. The second coupling portion defines an opening and includes first and second ribs extending into the opening and spaced apart along a longitudinal axis of the handle. The first and second ribs define a second groove therebetween. The damper occupies the first and second grooves.

The invention relates to a grinding machine, which is suitable for a robot-supported grinding process. According to one embodiment, the grinding machine has a housing, a motor arranged in the interior of the housing, a fan wheel arranged on a motor shaft of the motor in the interior of the housing, and a support plate coupled to the motor shaft for receiving a grinding disc. The support plate has openings for intake of grinding dust into the interior of the housing. The grinding machine furthermore has an outlet arranged in a wall of the housing for exhausting the grinding dust out of the interior of the housing and a non-rerun valve arranged in the wall of the housing. The non-return valve enables an to escape from the interior of the housing, but prevents intake of air into the interior of the housing.

A dustproof structure of a grinding tool holder, which comprises a shaft portion and a counterweight portion connected to one end of the shaft portion. The counterweight portion comprises an eccentric block connected to the shaft portion, at least one bearing mounted in the eccentric block, a dustproof ring, and a grinding member assembling head assembled with the bearing. The eccentric block is formed with an assembly port for disposing the bearing and the dustproof ring, the dustproof ring is located on a side of the bearing facing the grinding member assembling head, and formed with a first continuous concave-convex structure on a side away from the bearing, the grinding member assembling head is formed with a second continuous concave-convex structure on a side facing the dustproof ring, the first and second continuous concave-convex structures match with each other and define dust blocking dots.

A power tool is provided including a housing including a motor case and a handle; an electric motor housed within the motor case and rotatably driving a motor spindle; a gear case mounted on the housing; and an output spindle rotatably coupled to the motor spindle. The output spindle, motor spindle, and the handle form the plane through the housing. A fan is coupled to the motor to generate an airflow through the housing. The housing includes a first air inlet on a first side of the plane and a second air inlet a second side of the plane opposite the first air inlet, both adjacent the motor. The first air inlet is larger than the second air inlet to allow a larger volume of air to enter the housing from the first side of the plane than from the second side of the plane.

A servo driven compliant mechanism is provided. The servo driven compliant mechanism includes a holder, a first pivot, a grinding tool, a posture sensor, a displacement sensor, an inner frame, and a first servomotor. The first pivot is perpendicular to an axial direction of the grinding tool. The posture sensor is used for sensing a posture of the grinding tool and sending a posture signal to be transformed into a torque compensation value for an effect of gravity. The displacement sensor is used for sensing a displacement of the grinding tool along the first pivot. The grinding tool is disposed in the inner frame, and the first pivot is movably disposed in the inner frame. The first servomotor is disposed in the inner frame and drives the grinding tool to rotate along the first pivot according to the torque compensation value and the displacement.

A vibration-reducing component and an apparatus for its use. The vibration-reducing component combines an elastic member with a compression element to both resist applied forces and absorb selected vibrations. The vibration reducing component finds particular utility in tools that inherently create vibrations.

A power tool is provided including an output spindle rotatably driven by an electric motor. The output spindle defines a longitudinal axis and includes a threaded portion near a distal end and an annular rim. A retention flange is provided including a radially-oriented disc-shaped portion having a center through-hole through which the output spindle extends and a cylindrical wall peripherally extending from the disc-shaped portion around the output spindle. The disc-shaped portion is located between the distal end and the annular rim, and the cylindrical wall extends around the annular rim. At least one spring member is disposed between the annular rim and the retention flange. A retention member is provided to restrain an axial displacement of the retention flange away from the annular rim due to the biasing force of the spring member.

A power tool is provided including a housing including a motor case and a handle; an electric motor housed within the motor case and rotatably driving a motor spindle; a gear case mounted on the housing; and an output spindle rotatably coupled to the motor spindle. The output spindle, motor spindle, and the handle form the plane through the housing. A fan is coupled to the motor to generate an airflow through the housing. The housing includes a first air inlet on a first side of the plane and a second air inlet a second side of the plane opposite the first air inlet, both adjacent the motor. The first air inlet is larger than the second air inlet to allow a larger volume of air to enter the housing from the first side of the plane than from the second side of the plane.

An electric grinding machine tool comprises a grip body, a grinding disc and a battery, the grip body is arranged with a tool shaft connected with the grinding disc, a driving component capable of rotating the tool shaft when receiving power, and a circuit board electrically connected with the driving component and the battery, and the grip body has a battery mount exposed to an outer surface. The board surface of the circuit board is not perpendicular to the tool shaft, the circuit board and the battery mount are respectively positioned on opposite sides of the tool shaft, and a line passes through the circuit board, the battery mount, and the tool shaft. By changing the position of the circuit board, the height of the grip body is reduced, so that the gravity center of the grip body is reduced to improve stability of a grinding operation.

A polishing apparatus capable of preventing wear of rollers which are to transmit a load to a retainer ring and capable of preventing wear particles from escaping outside is disclosed. The polishing apparatus includes: a retainer ring disposed so as to surround the substrate and configured to press the polishing surface while rotating together with a head body; a rotary ring secured to the retainer ring and configured to rotate together with the retainer ring; a stationary ring disposed on the rotary ring; and a local-load exerting device configured to apply a local load to a part of the retainer ring through the rotary ring and the stationary ring. The rotary ring has rollers which are in contact with the stationary ring.