Abstract: A power supply structure of an electric grinding tool machine comprises a power management module, a power connecting wire and a battery socket, wherein the power management module is arranged on a main body of the electric grinding tool machine, the power connecting wire is electrically connected with the power management module and extends outside the main body of the electric grinding tool machine, and the battery socket is connected with the power connecting wire and can be randomly changed in position on the basis of the power connecting wire, the battery socket being used for a replaceable battery which is selectively arranged on the battery socket, and the battery socket being provided with a guide chute formed corresponding to a boss on the replaceable battery in shape and at least two conductive terminals arranged in the guide chute.

Abstract: A grinding machine tool with random eccentric orbital motion speed detection, the grinding machine tool comprises a body and a grinding disc, the body comprises a driving shaft and a tool holder connecting the grinding disc and having an eccentric distance relative to the driving shaft, and the grinding disc performs grinding in a random eccentric orbital motion when the driving shaft rotates. The grinding disc comprises at least one detected member on a side of the grinding disc facing the body for detecting a speed of the random eccentric orbital motion, and the at least one detected member defines a detection area with a range greater than or equal to twice the eccentric distance. Thereby, an accurate speed of the grinding disc performing the random eccentric orbital motion is obtained, so that the grinding operation of precision grinding which is gradually performed by automation is more precisely controlled.

Abstract: A tool grinding machine comprises a casing formed with at least one air inlet and at least one first air outlet; a driving component disposed in the casing; and a diversion structure. The driving component comprises a motor with a motor housing; and an airflow generator rotating synchronously with the motor and located at an end of the motor that is not connected to a grinding member. The motor housing comprises at least one first opening and at least one second opening communicating with an interior of the motor. The diversion structure is disposed in the casing or on the motor housing, and the diversion structure is provided to enable the tool grinding machine to define a first airflow path, which is composed of the air inlet, the first opening, the interior of the motor, the second opening, the airflow generator and the first air outlet sequentially.

Abstract: A grinding machine tool comprises a housing, a driving assembly disposed in the housing, a grinding disc driven by the driving assembly, and having a grinding surface and a non-grinding surface, a switch driving the driving assembly, and a pressing plate disposed on the housing and having a first state in which the switch drives the driving assembly to drive the grinding disc when the pressing plate is operated, and a second state in which the switch stops driving the driving assembly when the pressing plate is not operated. The grinding machine tool has a grinding disc braking structure detached from the non-grinding surface when the pressing plate is in the first state; when the pressing plate is in the second state, the grinding disc braking structure moves toward the non-grinding surface and contacts with the grinding disc to stop the grinding disc from rotating.

Abstract: A sanding disc stabilizing structure of an orbital sander comprises a casing, a sanding power source, a sanding disc, and at least four springs. The sanding power source is assembled on the casing and comprises a drive shaft and a tool holder disposed on the drive shaft and offset from an axis of the drive shaft. The center of the sanding disc driven by the sanding power source to perform an orbital motion is disposed on the tool holder with a locking screw. Two ends of each of the at least four springs are respectively disposed on the casing and the sanding disc. The free length of each of at least four springs is greater than the spacing between an installation part of the casing and an installation part of the sanding disc provided for one of the at least four springs.

Abstract: An exhaust motor of vacuum device comprises an electric motor comprising a motor casing and a drive shaft, and an air bucket connected to the electric motor. The air bucket defines an air inlet side and an air outlet side, at least one rotating fan driven by the drive shaft to generate a high-pressure airflow flowing from the air inlet side to the air outlet side is provided in the air bucket. The air bucket is provided with a diversion end plate forming a plurality of diversion passages, each of the diversion passages comprises an inlet and an outlet, and the inlet is located on an original output path of the high-pressure airflow. The diversion passages divert the high-pressure airflow to flow toward the motor casing, and turn the high-pressure airflow into a heat-dissipating airflow capable of exchanging heat with the motor casing.

Abstract: A working trolley with built-in dust suction system includes a dust suction system and a trolley. Through directly assembling the dust suction system with the trolley, useless structures in the dust suction system is eliminated, so that the dust suction system can be assembled with the trolley with a more simplified structure. Through directly assembling the dust suction system with the trolley, the trolley breaks the old and stereotyped way of using, and the trolley is no longer just a carrying tool of a vacuum cleaner, thereby greatly increasing the effectiveness of usage of the trolley. On the other hand, the present invention enables a dust storage bucket of the dust suction system to have a feature of being independently dismountable, so that an operator does not need to dismount other components when replacing the dust storage bucket, thereby facilitating operation for the operator.

Abstract: A dust suction system comprises a cyclonic dust filter component, a dust collection bucket and a load bearing frame. The dust collection bucket comprises an assembly rib, the load bearing frame comprises a frame and a support plate disposed on the frame, and the support plate comprises a through hole disposed corresponding to a dust exhausting port, and at least two assembly jaws located at two opposite sides of the through hole. Each of the assembly jaws comprises a connecting section, an extending section connecting the connecting section, and a limiting section connecting the extending section. The limiting section comprises a limiting protrusion disposed towards a direction of the through hole. When the two assembly jaws are not forced, movement of the assembly rib is restricted by the limiting section, so that the dust collection bucket is fixed on the frame.

Abstract: 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.

Abstract: A cyclonic dust filter device comprises a trunk, at least one first retaining wall, and at least one second retaining wall. The trunk comprises a channel, an air inlet end and an air outlet end disposed at two ends of the channel, and a dust filter hole communicating with the channel. The first and second retaining walls are respectively disposed correspondingly to the dust filter hole. When a dust-containing airflow to-be-filtered enters the channel from the air inlet end, the dust-containing airflow forms a centrifugal airflow that contains the dust and is thrown out of the channel at a position of the dust filter hole. The first and second retaining walls are respectively disposed on a traveling path of the centrifugal airflow, so that the centrifugal airflow sequentially strikes the first and second retaining walls to change the traveling direction and then discharges dust free clean air.

Abstract: A power supply structure of an electric grinding tool machine comprises a power management module, a power connecting wire and a battery socket, wherein the power management module is arranged on a main body of the electric grinding tool machine, the power connecting wire is electrically connected with the power management module and extends outside the main body of the electric grinding tool machine, and the battery socket is connected with the power connecting wire and can be randomly changed in position on the basis of the power connecting wire, the battery socket being used for a replaceable battery which is selectively arranged on the battery socket, and the battery socket being provided with a guide chute formed corresponding to a boss on the replaceable battery in shape and at least two conductive terminals arranged in the guide chute.

Abstract: A multi-cyclonic dust filter device comprises a dust collection chamber for collecting dust, a cyclonic chamber providing a gas to-be-filtered out dust to enter and forming a first cyclone to enter into the dust collection chamber, and a deflector component disposed between the dust collection chamber and the cyclonic chamber; the deflector component comprises a first deflector tube for receiving the gas to-be-filtered out dust refluxed from the dust collection chamber and forming a second cyclone, and a second deflector tube disposed in a same axial direction as the first deflector tube and separately disposed by an airflow convergence interval, the first deflector tube is provided with at least one dust filter hole for discharging the dust in the second cyclone, and the second deflector tube combines the first cyclone and the second cyclone through the airflow convergence interval to form a third cyclone for discharging.

Abstract: A grinding machine for grinding non-horizontal grinding surfaces comprises a deformation device which is disposed between a grinding power source and a grinding pad driven by the grinding power source. The deformation device includes a set of an offset unit and the deformation members disposed near one end of the grinding pad, wherein the offset units, the first deformation member and the second deformation member define deformation angles. Therefore, one end of the grinding pad is correspondingly fitted to various non-horizontal grinding surfaces independently through the variable angles of the deformation angle, especially for continuous irregular non-horizontal grinding surfaces. Thus, the present invention has excellent grinding effectiveness.

Abstract: A working trolley with built-in dust suction system includes a dust suction system and a trolley. Through directly assembling the dust suction system with the trolley, useless structures in the dust suction system is eliminated, so that the dust suction system can be assembled with the trolley with a more simplified structure. Through directly assembling the dust suction system with the trolley, the trolley breaks the old and stereotyped way of using, and the trolley is no longer just a carrying tool of a vacuum cleaner, thereby greatly increasing the effectiveness of usage of the trolley. On the other hand, the present invention enables a dust storage bucket of the dust suction system to have a feature of being independently dismountable, so that an operator does not need to dismount other components when replacing the dust storage bucket, thereby facilitating operation for the operator.

Abstract: An exhaust motor of vacuum device comprises an electric motor comprising a motor casing and a drive shaft, and an air bucket connected to the electric motor. The air bucket defines an air inlet side and an air outlet side, at least one rotating fan driven by the drive shaft to generate a high-pressure airflow flowing from the air inlet side to the air outlet side is provided in the air bucket. The air bucket is provided with a diversion end plate forming a plurality of diversion passages, each of the diversion passages comprises an inlet and an outlet, and the inlet is located on an original output path of the high-pressure airflow. The diversion passages divert the high-pressure airflow to flow toward the motor casing, and turn the high-pressure airflow into a heat-dissipating airflow capable of exchanging heat with the motor casing.

Abstract: A dust collecting device using multi-cyclone dust filtration includes a dust collecting chamber, cyclone chamber and airflow guiding component. The dust collecting chamber communicates with the cyclone chamber having an intake port for a gas to be filtered, an annular side wall connected to intake port and guiding gas to be filtered to form a first cyclone, an engaging port communicated with dust collecting chamber and allowing first cyclone to enter dust collecting chamber, and an exhaust port. The airflow guiding component within cyclone chamber is provided with a return flow tube receiving the returned gas to be filtered and forming a second cyclone, an airflow guiding bonnet separated from return flow tube, and a dust filtration channel between airflow guiding bonnet and return flow tube. The second cyclone flows toward the exhaust port, and enables dust therein to enter cyclone chamber again, as passing by dust filtration channel.

Abstract: A cyclonic dust filter device comprises a trunk, at least one first retaining wall, and at least one second retaining wall. The trunk comprises a channel, an air inlet end and an air outlet end disposed at two ends of the channel, and a dust filter hole communicating with the channel. The first and second retaining walls are respectively disposed correspondingly to the dust filter hole. When a dust-containing airflow to-be-filtered enters the channel from the air inlet end, the dust-containing airflow forms a centrifugal airflow that contains the dust and is thrown out of the channel at a position of the dust filter hole. The first and second retaining walls are respectively disposed on a traveling path of the centrifugal airflow, so that the centrifugal airflow sequentially strikes the first and second retaining walls to change the traveling direction and then discharges dust free clean air.

Abstract: An exhaust filter device comprises a filter chamber and a gas permeable filter, the filter chamber comprises an air inlet and an air outlet, the air inlet is connected to a dust filter device and receives an airflow that flows in from the dust filter device. The gas permeable filter is disposed in the filter chamber, and comprises convex portions and concave portions on a side of the gas permeable filter facing the air inlet. The convex portions disposed at interval and the concave portions respectively disposed between two of the adjacent convex portions. The gas permeable filter divides the airflow into a first air current directly flowing to the air outlet through the gas permeable filter, and a second air current flowing along a surface of at least one of the convex portions and the concave portions and flowing to the air outlet through the gas permeable filter.

Abstract: A multi-cyclonic dust filter device comprises a dust collection chamber for collecting dust, a cyclonic chamber providing a gas to-be-filtered out dust to enter and forming a first cyclone to enter into the dust collection chamber, and a deflector component disposed between the dust collection chamber and the cyclonic chamber; the deflector component comprises a first deflector tube for receiving the gas to-be-filtered out dust refluxed from the dust collection chamber and forming a second cyclone, and a second deflector tube disposed in a same axial direction as the first deflector tube and separately disposed by an airflow convergence interval, the first deflector tube is provided with at least one dust filter hole for discharging the dust in the second cyclone, and the second deflector tube combines the first cyclone and the second cyclone through the airflow convergence interval to form a third cyclone for discharging.

Abstract: A dust suction system comprises a cyclonic dust filter component, a dust collection bucket and a load bearing frame. The dust collection bucket comprises an assembly rib, the load bearing frame comprises a frame and a support plate disposed on the frame, and the support plate comprises a through hole disposed corresponding to a dust exhausting port, and at least two assembly jaws located at two opposite sides of the through hole. Each of the assembly jaws comprises a connecting section, an extending section connecting the connecting section, and a limiting section connecting the extending section. The limiting section comprises a limiting protrusion disposed towards a direction of the through hole. When the two assembly jaws are not forced, movement of the assembly rib is restricted by the limiting section, so that the dust collection bucket is fixed on the frame.