Abstract: A planetary gear assembly includes a wheel hub surrounding an axis, and having an end face and a plurality of engaging recesses formed in the end face, and a planetary gear reduce mechanism including a sun gear disposed on and rotatable about the axis, a plurality of planet gears, and first and second ring gears. The planet gears angularly surround the sun gear and mesh with the sun gear and the first and second ring gears. The first ring gear is stationary relative to the planet gears. The second ring gear is arranged between the wheel hub and the first ring gear along the axis. The second ring gear includes a wheel-hub-facing face surrounding the axis and facing the end face, and a plurality of joining protrusions disposed on the wheel-hub-facing face and respectively complementary in shape with and respectively engage the engaging recesses.

Abstract: A planetary gear assembly includes a wheel hub surrounding an axis, and having an end face and a plurality of engaging recesses formed in the end face, and a planetary gear reduce mechanism including a sun gear disposed on and rotatable about the axis, a plurality of planet gears, and first and second ring gears. The planet gears angularly surround the sun gear and mesh with the sun gear and the first and second ring gears. The first ring gear is stationary relative to the planet gears. The second ring gear is arranged between the wheel hub and the first ring gear along the axis. The second ring gear includes a wheel-hub-facing face surrounding the axis and facing the end face, and a plurality of joining protrusions disposed on the wheel-hub-facing face and respectively complementary in shape with and respectively engage the engaging recesses.

Abstract: A miter saw with a pivotally rotatable extension includes a base, a worktable, a cutting member, and an extension member. The base has a pair of lateral edges oppositely extending along a longitudinal direction, a top surface correspondingly engaged to each lateral edge. The worktable is rotatably mounted to the base, and has a work surface corresponding to the top surface. The cutting member is connected to the worktable. The extension member is pivotally mounted to one of the lateral sides of the base. The extension member is convertible between an extended position and a retracted position relative to the base. The extension member has an extension surface. At the extended position, the extension surface is engaged to the top surface longitudinally for supporting a workpiece. At the retracted position, the extension surface is substantially perpendicular to the top surface for minimizing the size of the miter saw.

Abstract: A saw machine worktable positioning mechanism includes a pivot shaft, an operating member and a first positioning unit so arranged that operating the operating member can drive the first positioning unit to move a positioning member of the first positioning unit relative to the base of the saw machine in one of two reversed directions to lock the worktable of the saw machine to the base or to unlock the worktable from the base.

Abstract: Foldable miter saws and a folding method of miter saws are disclosed. The foldable miter saws includes a base unit, a worktable, and a cutting unit. The cutting unit includes a support arm pivotally mounted on the worktable, a saw blade, and a driver. The miter saw folding method includes the step of biasing the cutting unit relative to the base unit and the step of rotating the support arm relative to the base unit and the worktable to change the cutting unit from a working position to a folded position, thus reducing the vertical space occupied by the cutting unit and facilitating delivery, storage and package of the foldable miter saws.

Abstract: A foldable miter saw includes a base unit, a worktable, and a cutting unit adjustable between a working position where the saw blade of the cutting unit and the worktable define a contained angle within 90°˜45° and a folded position where one end face of the saw blade is disposed in proximity to the working surface and one guiding member and one sliding coupling component of the worktable are disposed in proximity to a working surface of the worktable, significantly reducing the dimension of the foldable miter saw and facilitating storage and packaging.

Abstract: A table saw includes a worktable, a left extension frame and a right extension frame respectively slidably mounted at left and right sides of the worktable, a scale unit including a first scale, a second scale and a third scale respectively mounted at the worktable, the left extension frame and the right extension frame, and an indicator unit including a first indicator, a second indicator and a third indicator respectively disposed to aim at the first, second and third scales. Thus, when operating the table saw to cut a workpiece, the user can selectively pull out the left or right extension frame and use the corresponding scale and indicator for quickly judging the correctness of the length to be cut.

Abstract: A modular circular saw includes a base, a worktable disposed on the base and a workpiece supporting unit. The workpiece supporting unit has two supporting frames respectively and correspondingly located on two lateral sides of the worktable; each workpiece supporting unit has a supporting shaft and two corresponding extending shafts. Each extending shaft has one end pivotally connected to the base, another end of the extending shaft is pivotally connected to one end of the supporting shaft, correspondingly. When the workpiece supporting unit is in an extended position for receiving a workpiece, the two supporting shafts are substantially co-planar with the worktable, such that the two supporting shafts provides extra support to a workpiece of large size. When the workpiece supporting unit is in a folded position, the two supporting shafts are located above the worktable for minimizing the size of the saw and for allowing the user to grip the saw for easy transportation.

Abstract: A foldable miter saw includes a base unit, a worktable, and a cutting unit adjustable between a working position where the saw blade of the cutting unit and the worktable define a contained angle within 90°˜45° and a folded position where one end face of the saw blade is disposed in proximity to the working surface and one guiding member and one sliding coupling component of the worktable are disposed in proximity to a working surface of the worktable, significantly reducing the dimension of the foldable miter saw and facilitating storage and packaging.

Abstract: A saw machine worktable positioning mechanism includes a pivot shaft, an operating member and a first positioning unit so arranged that operating the operating member can drive the first positioning unit to move a positioning member of the first positioning unit relative to the base of the saw machine in one of two reversed directions to lock the worktable of the saw machine to the base or to unlock the worktable from the base.

Abstract: A saw machine worktable positioning mechanism includes a pivot shaft, an operating member and a first positioning unit so arranged that operating the operating member can drive the first positioning unit to move a positioning member of the first positioning unit relative to the base of the saw machine in one of two reversed directions to lock the worktable of the saw machine to the base or to unlock the worktable from the base.

Abstract: A fence assembly for miter saw includes a mounting base defining a first abutting surface, and a fence unit mounted at the mounting base in one of first, second and third positions in such a manner that the second abutting surface of the fence unit is disposed co-planar with the first abutting surface of the mounting base when the fence unit is set in the first position; the third abutting surface of the fence unit is disposed in a non-coplanar relationship with the first abutting surface of the mounting base to face toward the same direction when the fence unit is set in the second position; the fourth abutting surface of the fence unit is disposed in a non-coplanar relationship with the first abutting surface of the mounting base to face toward the same direction when the fence unit is set in the third position.

Abstract: A safety lock mechanism mounted at a trigger switch handle of a miter saw to face toward a switch which includes a switch button pivotally mounted at the trigger switch handle to face toward the switch, and a safety lock connected to the switch button and providing an engaging portion and movable between a locking position where the engaging portion engages into the trigger switch handle to lock the switch button to the trigger switch handle and an unlocking position where the engaging portion is disengaged from the trigger switch handle for allowing the switch button to be moved relative to the trigger switch handle to trigger the switch. Thus, the arrangement of the safety lock prevents the user from accidentally forcing the switch button to trigger the switch, enhancing the operational safety of the miter saw.

Abstract: A collapsible stand mainly includes a support unit including two stand legs pivotally connected together in a crossed manner and a support arm set pivotally connected to one stand leg, a positioning unit including an abutment member and a bearing member respectively mounted at one stand leg and the support art set and so configured that when the collapsible is extended out or collapsed, the abutment member is engaged with a different part of the bearing member, and a control unit mounted at one stand leg and operable to bias the abutment member, moving the abutment member into engagement or away from the bearing member. Thus, the collapsible stand has a simple structure, facilitates operation and ensures a high level of operational safety and structural stability.

Abstract: A collapsible stand mainly includes a support unit including two stand legs pivotally connected together in a crossed manner and a support arm set pivotally connected to one stand leg, a positioning unit including an abutment member and a bearing member respectively mounted at one stand leg and the support art set and so configured that when the collapsible is extended out or collapsed, the abutment member is engaged with a different part of the bearing member, and a control unit mounted at one stand leg and operable to bias the abutment member, moving the abutment member into engagement or away from the bearing member. Thus, the collapsible stand has a simple structure, facilitates operation and ensures a high level of operational safety and structural stability.

Abstract: A modular circular saw includes a base, a worktable disposed on the base and a workpiece supporting unit. The workpiece supporting unit has two supporting frames respectively and correspondingly located on two lateral sides of the worktable; each workpiece supporting unit has a supporting shaft and two corresponding extending shafts. Each extending shaft has one end pivotally connected to the base, another end of the extending shaft is pivotally connected to one end of the supporting shaft, correspondingly. When the workpiece supporting unit is in an extended position for receiving a workpiece, the two supporting shafts are substantially co-planar with the worktable, such that the two supporting shafts provides extra support to a workpiece of large size. When the workpiece supporting unit is in a folded position, the two supporting shafts are located above the worktable for minimizing the size of the saw and for allowing the user to grip the saw for easy transportation.

Abstract: A table saw includes a worktable, a left extension frame and a right extension frame respectively slidably mounted at left and right sides of the worktable, a scale unit including a first scale, a second scale and a third scale respectively mounted at the worktable, the left extension frame and the right extension frame, and an indicator unit including a first indicator, a second indicator and a third indicator respectively disposed to aim at the first, second and third scales. Thus, when operating the table saw to cut a workpiece, the user can selectively pull out the left or right extension frame and use the corresponding scale and indicator for quickly judging the correctness of the length to be cut.

Abstract: Foldable miter saws and a folding method of miter saws are disclosed. The foldable miter saws includes a base unit, a worktable, and a cutting unit. The cutting unit includes a support arm pivotally mounted on the worktable, a saw blade, and a driver. The miter saw folding method includes the step of biasing the cutting unit relative to the base unit and the step of rotating the support arm relative to the base unit and the worktable to change the cutting unit from a working position to a folded position, thus reducing the vertical space occupied by the cutting unit and facilitating delivery, storage and package of the foldable miter saws.

Abstract: A saw machine worktable positioning mechanism includes a pivot shaft, an operating member and a first positioning unit so arranged that operating the operating member can drive the first positioning unit to move a positioning member of the first positioning unit relative to the base of the saw machine in one of two reversed directions to lock the worktable of the saw machine to the base or to unlock the worktable from the base.

Abstract: A fence assembly for miter saw includes a mounting base mounted at a supporting base and defining a first abutting surface that extends perpendicular to a first work surface of the supporting frame, and a fence unit selectively mountable at the mounting base in a first position or second position and defining a second abutting surface, which is disposed perpendicular to the first work surface and co-planar with the first abutting surface when the fence unit is set in the first position, or perpendicular to the first work surface in a non-coplanar manner relationship with the first abutting surface when the fence unit is set in the second position. Thus, changing the position of the fence unit achieves an increase in the cutting stroke.