Abstract: A grinding device includes a waist-buckled device, a waxing/polishing device and a power cord. One of terminals of the power cord is connected to the waist-buckled device, and the other one of the terminals of the power cord is connected to the waxing/polishing device. The waist-buckled device includes an electric control board and a battery pack. The electronic control board is connected to the battery pack. Thus, it is convenient for the user to save the user's time and improve the efficiency of polishing works so that the machine in long time use can be achieved.

Abstract: A foam spray can includes a motor pump, a foaming tube, a can body, a cover body and a quick release structure. One end of the foaming tube is connected to the motor pump. The can body contains liquid. The cover covers an opening of the can body. The quick release structure includes a first and a second engaging structures disposed on the cover body and the can body, respectively. The first engaging structure can be engaged with the second engaging structure along a first direction. The first engaging structure can be separated from the second engaging structure in a moving distance less than a half circumference of the opening of the can body along a second direction opposite to the first direction. Therefore, the cover body and the cover body of the foam spray can be quickly assembled and disassembled.

Abstract: A foam spray can comprises a motor pump, a foaming tube and a nozzle. The motor pump can be used to suck air and solution and pump out the liquid-gas mixture. One end of the foaming tube is connected to the motor pump for transmitting the liquid-gas mixture pumped by the motor pump and fully mixing the air with the solution to produce foam. The nozzle is connected to the other end of the foaming tube to spray foam. The length of the foaming tube is between 10 to 500 cm, the tube inner diameter is between 0.8 to 20 mm, and the pressure of the liquid-gas mixture in the tube is between 8 to 32 PSI, thereby to provide sufficient time, space and conditions for the mixing of the air and the solution in the foaming tube to fully mix the air and the solution, and then to spray abundant foam from the nozzle.

Abstract: A foam spray can comprises a motor pump, a foaming tube and a nozzle. The motor pump can be used to suck air and solution and pump out the liquid-gas mixture. One end of the foaming tube is connected to the motor pump for transmitting the liquid-gas mixture pumped by the motor pump and fully mixing the air with the solution to produce foam. The nozzle is connected to the other end of the foaming tube to spray foam. The length of the foaming tube is between 10 to 500 cm, the tube inner diameter is between 0.8 to 20 mm, and the pressure of the liquid-gas mixture in the tube is between 8 to 32 PSI, thereby to provide sufficient time, space and conditions for the mixing of the air and the solution in the foaming tube to fully mix the air and the solution, and then to spray abundant foam from the nozzle.

Abstract: A rotating machine comprises a housing, a rotating shaft and an oil seal structure. The housing has an opening. The rotating shaft extends from the inside of the housing through the opening to the outside of the housing. The oil seal structure is set at the opening. The oil seal structure includes a body, an annular groove and an annular elastic structure. The body has a through hole to accommodate the rotating shaft. The annular groove is located on the surface of the body facing the outside of the housing and surrounds the through hole. The annular elastic structure is arranged in the annular groove to apply force to the rotating shaft. Thereby, the connection between the oil seal structure and the rotating shaft can be strengthened to ensure the sealing effect and prevent external moisture from entering the housing.

Abstract: A gearbox with motor fixing structure is used to fix a motor on the gearbox. The motor has a body and a shaft protruding from the leading edge of the body. The gearbox with motor fixing structure comprises a box and a metal part. The box has a gear set configured inside. An outer edge of a side wall of the box has a first hole. The metal part is configured inside the box. The motor is embedded in the first hole. The leading edge of the body of the motor is locked on the metal part, and the shaft of the motor passes through the metal part into the box to connect with the gear set.

Abstract: A handheld machine tool comprises a machine tool main body and a tool part. The machine tool main body comprises a round housing, a grip portion and a convex portion. The round housing is a cylindrical shape and has a shaft accommodation portion disposed at the bottom. The tool part is connected to the machine tool main body through the shaft accommodation portion. The grip portion and the convex portion are disposed on a side of the round housing. The handheld machine tool further comprises a first button and a second button. The first button is located in an inertial direction of rotation of the machine tool main body during operation. When a user keeps pressing the first button with the finger to drive the tool part to operate continuously, the machine tool main body pushes the first button to the finger pressed thereon along the inertia direction.

Abstract: The present inventive concept discloses to a cleaning apparatus for cleaning both sides of the glass panel. The cleaning apparatus comprises two cleaning components attracted to each other and attached on opposite sides of the glass panel. Each of the cleaning components comprises a body, a cleaning module, and a plurality of magnetic modules. The body has a central portion and a peripheral portion. The body has plurality of grooves on a bottom surface of the peripheral portion. Each of the magnetic modules has a magnetic wheelset disposed in the groove and exposed on the bottom surface of the body. The two cleaning components are adsorbed to opposite sides of the glass panel by the magnetic attraction of the magnetic wheelsets. One of the cleaning components could be driven by a motor to rotate itself and drive the other cleaning component on the opposite side of the glass panel to rotate together.

Abstract: A gearbox with flow guiding structure comprises a box and an oil retaining ring. The box has a gear set configured inside. The gear set comprises a worm and an epicyclic gear set engaged with the worm. The box comprises an upper casing and a lower casing. The upper casing is disposed on the lower casing. An oil retaining wall is disposed on the bottom of the upper casing. The oil retaining wall is disposed inside the lower casing sidewall when the upper casing is engaged with the lower casing, and is disposed around the epicyclic gear set. The oil retaining ring is disposed around the epicyclic gear set. The outer side wall of the oil retaining ring has a curvature.

Abstract: Agearbox with motor fixing structure is used to fix a motor on the gearbox. The motor has a body and a shaft protruding from the leading edge of the body. The gearbox with motor fixing structure comprises a box and a metal part. The box has a gear set configured inside. An outer edge of a side wall of the box has a first hole. The metal part is configured inside the box. The motor is embedded in the first hole. The leading edge of the body of the motor is locked on the metal part, and the shaft of the motor passes through the metal part into the box to connect with the gear set.

Abstract: A handheld machine tool comprises a machine tool main body and a tool part. The machine tool main body comprises a circular shaft, a grip portion and a convex portion. The circular shaft is a cylindrical shape and has a convex shaft disposed at the bottom. The tool part is connected to the machine tool main body through the convex shaft. The grip portion and the convex portion are disposed on a side of the circular shaft. The handheld machine tool further comprises a first button and a second button. The first button is located in an inertial direction of rotation of the machine tool main body during operation. When a user keeps pressing the first button with the finger to drive the tool part to operate continuously, the machine tool main body pushes the first button to the finger pressed thereon along the inertia direction.

Abstract: A power mechanism and a handheld tool using the same are provided. The power mechanism comprises a motor, a worm, an epicyclic gearing set and a controlling board. The worm is driven by the motor. The epicyclic gearing set is engaged with the worm. The controlling board is used to control the on/off or operating state of the motor.

Abstract: The present invention provides a fast detachable polishing plate mechanism. The fast detachable polishing plate mechanism includes a polishing plate and a rod. The polishing plate has an adhesion unit disposed on the lower surface of the polishing plate. The rod connects straightly to the upper surface of the polishing plate. The rod is divided into an upper section, a middle section and a lower section from top to bottom, and only the middle section has a thread. The present invention further provides a hand-held machine tool having a drive shaft. The drive shaft has a tapped hole. The fast detachable polishing plate mechanism is mounted to the hand-held machine tool through the rod being inserted to the tapped hole.

Abstract: A transmission shaft comprises a first rotating shaft and a second rotating shaft. The first rotating shaft has a first connecting end. The second rotating shaft has a second connecting end. The first connecting end is used for driving the second connecting end to rotate the second rotating shaft when the first rotating shaft rotates.

Abstract: A transmission shaft and peripheral structure comprises a first rotating shaft, a bearing, a first frame, a second rotating shaft, a second frame, a first gasket and a second gasket. The bearing is connected to the first rotating shaft. The first frame is connected to the bearing. The second rotating shaft is used for driving the first rotating shaft when the second rotating shaft rotates. The second frame is connected to the second rotating shaft. The first gasket is disposed under the bearing to cover the gap below the bearing. The second gasket is disposed above the bearing to cover the gap above the bearing. Silicone oil is filled between the first gasket and the bearing and between the second gasket and the bearing.

Abstract: A motor apparatus and a motor driving circuit are provided. The motor apparatus includes a motor module and the motor driving circuit. The motor driving circuit includes a plurality of bridge arm circuits, a temperature sensor, and a control circuit. Each of the bridge arm circuits is controlled by one of the first PWM signals and one of the second PWM signals generated by the control circuit and outputs a driving signal to drive the motor module. The temperature sensor senses a temperature of the bridge arm circuits and provides a temperature sensing value to the control circuit. When the temperature sensing value is greater than or equal to a threshold temperature value, the control circuit increases a duty cycle of the first PWM signal of one bridge arm circuit and a duty cycle of the second PWM signal of the other bridge arm circuits to lower the temperature.