Abstract: A vertical band saw machine includes a first transmitting shaft driven by a drive force of a motor, a second transmitting shaft journaling a lower blade mounting pulley for rotating an endless band saw blade, and a speed ratio varying device coupling the transmitting shafts. The device includes two pitch-variable first and second pulleys mounted on the transmitting shafts, a belt trained on the pulleys, and a control unit operable to move a movable disc of the second pulley toward or away from a fixed disc of the second pulley so as to vary the radial distance between the belt and each of the transmitting shafts, thereby freely varying the speed ratio of the second transmitting shaft to the first transmitting shaft so as to rotate the saw blade at a desired speed.

Abstract: A vertical band saw machine includes a base, an upright post extending from the base, amounting frame slidably retained relative to the upright post, upper and lower blade mounting pulleys and a tension-equalizing guider pulley rotatably mounted on the mounting frame, the base and the upright post, respectively, an endless band saw blade trained on the pulleys to define upper and lower inclined side paths, and a tension adjusting member disposed to displace the mounting frame between a loosened position to facilitate replacement of the blade, and a tensed position. The guider pulley is brought into synchronized movement with the mounting frame such that the ratio of lengths between the upper and lower inclined side paths is kept unchanged.

Abstract: A circular saw includes a worktable, a blade supporting unit pivotally mounted to the worktable, a saw blade shaft mounted rotatably on the supporting unit and driven by a motor to rotate a saw blade, a driving shaft mounted rotatably on the supporting unit, and a dust collecting member confining a dust passageway which has an intake port in the vicinity of the saw blade, and an outlet port for passage of wood dust. A blower casing is disposed outwardly of the supporting unit, and defines an accommodation chamber disposed downstream of the outlet port and receiving a driving end of the driving shaft. An impeller is mounted on the driving end and is rotatable so as to draw wood dust from the dust passageway into the accommodation chamber and out through a discharge port.

Abstract: A grinding machine includes a driving unit, a grinding wheel unit, an abrasive belt unit and a dust-collecting device. The dust-collecting device includes a dust-discharging unit and a dust-guiding unit. The dust-discharging unit includes a dust-collecting seat disposed fixedly on a side cover of the grinding wheel unit, and a suction fan assembly disposed within the dust-collecting seat. The dust-guiding unit includes a conduit communicated with a dust-receiving chamber in the grinding wheel unit and an accommodating chamber in the abrasive belt unit. The grinding wheel unit, the abrasive belt unit and the suction fan assembly are driven by the driving unit. Dust is induced by the suction fan assembly to move from the dust-receiving chamber and the accommodating chamber into the dust-collecting seat.

Abstract: A table saw includes a worktable turnable relative to a mounting frame, a support seat journalled on bearing members of the mounting frame and slidable relative thereto along a sliding path, and a saw blade rotated with a blade shaft driven by a motor. A spindle is rotatably mounted to the support seat and is coupled to the blade shaft so as to move the blade shaft when rotated, thereby adjusting height of the saw blade relative to the worktable. An inclination adjusting member is disposed to actuate the support seat to move along the sliding path so as to change an angular position of the saw blade relative to the worktable.

Abstract: A conveyer belt-adjusting device for a conveyer unit includes a platform for supporting two rollers at two opposite sides thereof. An endless conveyer belt is disposed around the rollers. A pushing rod extends along a transverse direction of the conveyer belt, and is disposed between the platform and a bottom belt portion of the conveyer belt, and is also between the rollers. The pushing rod presses against an intermediate portion of the bottom belt portion such that the intermediate portion of the bottom belt portion is disposed below two ends of the bottom belt portion. Two adjustable supporting units support respectively two opposite ends of the pushing rod on the platform, and are located respectively at two opposite sides of the conveyer belt. Relative vertical positions of the ends of the pushing rod can be changed by adjusting the supporting units.

Abstract: A sand belt-tensioning device includes a drive roller, a fixing member, a pulling member, and a resilient member. A sand belt is wound around a roller body of the drive roller. The drive roller has opposite first and second end surfaces that are formed respectively with axially extending first and second rotating shafts. The fixing member is sleeved fixedly on the first rotating shaft, and is connected fixedly to an end of the sand belt. The pulling member is sleeved rotatably on the second rotating shaft, and is connected fixedly to the other end of the sand belt at an eccentric position. The resilient member biases the pulling member to rotate about the second rotating shaft in a direction so as to tauten the sand belt on the drive roller.

Abstract: A vertical band saw machine includes a first transmitting shaft driven by a drive force of a motor, a second transmitting shaft journaling a lower blade mounting pulley for rotating an endless band saw blade, and a speed ratio varying device coupling the transmitting shafts. The device includes two pitch-variable first and second pulleys mounted on the transmitting shafts, a belt trained on the pulleys, and a control unit operable to move a movable disc of the second pulley toward or away from a fixed disc of the second pulley so as to vary the radial distance between the belt and each of the transmitting shafts, thereby freely varying the speed ratio of the second transmitting shaft to the first transmitting shaft so as to rotate the saw blade at a desired speed.

Abstract: A vertical band saw machine includes a base, an upright post extending from the base, amounting frame slidably retained relative to the upright post, upper and lower blade mounting pulleys and a tension-equalizing guider pulley rotatably mounted on the mounting frame, the base and the upright post, respectively, an endless band saw blade trained on the pulleys to define upper and lower inclined side paths, and a tension adjusting member disposed to displace the mounting frame between a loosened position to facilitate replacement of the blade, and a tensed position. The guider pulley is brought into synchronized movement with the mounting frame such that the ratio of lengths between the upper and lower inclined side paths is kept unchanged.

Abstract: A table saw has a height and inclination adjustable saw blade which is mounted on and rotatable with a blade shaft that is driven by a motor. A support seat is movable relative to a mounting frame, and supports the blade shaft. A shaving collecting member is disposed in the vicinity of the saw blade to collect wood shavings. A casing is secured to the support seat, and is communicated with the shaving collecting member. An impeller is disposed rotatably in the casing, and is mounted on a driven shaft that is coupled to the blade shaft so as to permit rotation of the impeller when the motor is in operation, thereby drawing wood shavings from the shaving collecting member to the casing and out of a discharge port in the casing.

Abstract: A wood-turning lathe includes a spindle and a drive shaft journalled to a headstock housing. A motor is mounted in the headstock housing, and includes a rotor. A torque converter includes a first wheel that co-axially surrounds the spindle and that is securely coupled to the rotor, a second wheel mounted securely on the drive shaft, and a belt trained on the first and second wheels, thereby increasing torque of the drive shaft. A speed change device includes a first pulley unit mounted on the drive shaft and defining a first belt-engaging surface, a second pulley unit mounted on the spindle and defining a second belt-engaging surface, and a non-elastic belt interconnecting the first and second pulley units and frictionally contacting the first and second belt-engaging surfaces.

Abstract: A rotary grinding machine includes a rotary grinding member for grinding a workpiece on a workpiece feeding member. The grinding member is coupled with an output shaft of a motor through a drive transmission mechanism. The feeding member is coupled with the output shaft of the motor through a reduction gear mechanism, a transmission shaft and an endless tensible transmission member. To maintain an operating tension of the tensible transmission member when the feeding member is moved relative to the grinding member, a tensioning mechanism is disposed to enable effective transmission of a drive force from the reduction gear mechanism to the feeding member.

Abstract: A circular saw includes a worktable, a blade supporting unit pivotally mounted to the worktable, a saw blade shaft mounted rotatably on the supporting unit and driven by a motor to rotate a saw blade, a driving shaft mounted rotatably on the supporting unit, and a dust collecting member confining a dust passageway which has an intake port in the vicinity of the saw blade, and an outlet port for passage of wood dust. A blower casing is disposed outwardly of the supporting unit, and defines an accommodation chamber disposed downstream of the outlet port and receiving a driving end of the driving shaft. An impeller is mounted on the driving end and is rotatable so as to draw wood dust from the dust passageway into the accommodation chamber and out through a discharge port.

Abstract: A circular saw includes a worktable, a mounting seat extending upwardly from the worktable for mounting a motor thereon, a blade supporting unit pivotally mounted on the mounting seat at a pivot end so that an opposite free end is turnable to be close to and away from the worktable, and a saw blade shaft mounted rotatably on the blade supporting unit about a blade axis parallel to an output shaft axis of an output shaft of the motor and having a saw blade mounted thereon. The saw blade shaft is coupled to the output shaft by a drive transmitting unit which transmits driving force of the output shaft to the saw blade shaft so as to rotate the saw blade.

Abstract: A wood lathe includes a bed, a headstock mounted on the bed and having a headstock housing, a motor mounted in the headstock housing and having a driving shaft with opposite first and second output ends, a spindle journalled to the headstock housing, a first transmission interconnecting the first output end and the spindle, a cooling fan disposed in the headstock housing for cooling the motor and including a driven shaft that is journalled to the headstock housing, and a second transmission interconnecting the second output end and the driven shaft. The cooling fan delivers airflow toward an annular outer area of the motor in a transverse direction relative to a rotation axis of the driving shaft.

Abstract: A scroll sawing machine includes a first transmitting shaft driven by an output shaft of a motor, a second transmitting shaft rotatable to move a blade-driving member in an upright direction so as to enable a saw blade to perform reciprocating movement, and a speed ratio varying device disposed to couple the transmitting shafts. The device includes two pitch-variable first and second pulleys mounted on the transmitting shafts, a belt trained on the pulleys, and a control unit operable to move a movable disc of the first pulley toward or away from a fixed disc of the first pulley so as to vary the radial distances between the belt and each of the transmitting shafts, thereby varying the speed ratio of the second transmitting shaft to the first transmitting shaft.

Abstract: A table saw includes a base, a rip fence unit with a sliding member mounted slidably on a rail unit on the base, and a positioning unit having a clamping member disposed below the rail unit and swingable between a clamping position, in which the clamping member cooperates with the sliding member to clamp the rail unit therebetween, and a releasing position, in which the clamping member is disconnected from the rail unit.

Abstract: A lawn mower includes a vehicle body, and a grass-cutting unit for cutting grass into long grass strips that move into a grass-shredding device, within which the long grass strips are shredded. Shredded grass drops from the grass-shredding device onto the lawn so as to serve as humus.

Abstract: A table saw includes a worktable turnable relative to a mounting frame, a support seat journalled on bearing members of the mounting frame and slidable relative thereto along a sliding path, and a saw blade rotated with a blade shaft driven by a motor. A spindle is rotatably mounted to the support seat and is coupled to the blade shaft so as to move the blade shaft when rotated, thereby adjusting height of the saw blade relative to the worktable. An inclination adjusting member is disposed to actuate the support seat to move along the sliding path so as to change an angular position of the saw blade relative to the worktable.

Abstract: A table saw has a height and inclination adjustable saw blade which is mounted on and rotatable with a blade shaft that is driven by a motor. A support seat is movable relative to a mounting frame, and supports the blade shaft. A shaving collecting member is disposed in the vicinity of the saw blade to collect wood shavings. A casing is secured to the support seat, and is communicated with the shaving collecting member. An impeller is disposed rotatably in the casing, and is mounted on a driven shaft that is coupled to the blade shaft so as to permit rotation of the impeller when the motor is in operation, thereby drawing wood shavings from the shaving collecting member to the casing and out of a discharge port in the casing.