Abstract

a-1) being provided with, at a side facing a corresponding second engagement portion, a third engagement portion engageable with the corresponding second engagement portion. The working tool is capable of reducing operation mistakes as much as possible, preventing inadvertent shutdown of the motor, and allowing any operator, no matter left-handed or right-handed, to operate it conveniently.

IPC Classes  ?

• B24B 23/02 - Portable grinding machines, e.g. hand-guidedAccessories therefor with rotating grinding toolsAccessories therefor
• B24B 55/05 - Protective covers for the grinding wheel specially designed for portable grinding machines
• B25F 5/02 - Construction of casings, bodies or handles
• B24B 23/00 - Portable grinding machines, e.g. hand-guidedAccessories therefor
• B24B 9/00 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor

Abstract

A working tool, which comprises: a housing (10), a rotatable switch lock (1) installed in a gap on an operating lever (3); a first clamping part (1a) arranged on the switch lock, a stopper (1b) arranged on the other side of the switch lock, a supporting part (3a) that is arranged in the inner part of the operating lever and near the first clamping part, a left push button (8) and a right push button (5) respectively inserted in left and right sides of a holding end of the housing, a second clamping part arranged on groove walls of a first groove (8a) and a second groove (5a) respectively in the left and right push buttons, and a third clamping part matching the second clamping part on a side of a first extended segment (3a-2) and a second extended segment (3a-1) respectively that faces the second clamping part. The working tool provided by the present invention can prevent misoperations to the maximum extent and prevent stopping of a drive motor by mistake, and can be conveniently operated by both left-handed and right-handed users.

IPC Classes  ?

• B24B 9/00 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor
• B24B 23/00 - Portable grinding machines, e.g. hand-guidedAccessories therefor
• B24B 55/05 - Protective covers for the grinding wheel specially designed for portable grinding machines
• B25F 5/02 - Construction of casings, bodies or handles

Abstract

An electrical angle grinder having an open-and-locked in feature, comprising a housing (6), an operating rod (4), and a dial (1). The operating rod (4) is connected at both ends thereof to the housing (6) and is for use operating a switch part (5) of the electric angle grinder. A gap for use in mounting the dial (1) is formed on the operating rod (4), while the dial (1) is arranged within the gap. A rotary pin (3) is bored onto the dial (1). A portion of the dial (1) is exposed outside of the operating rod (4), while the remaining portion of the dial (1) is arranged within the housing (6). The portion of the dial (1) arranged within the housing (6) is connected to an extension rod (1a). A protruding block (1b) is arranged on one side of the extension rod (1a) while an engaging part (1c) is arranged on an end part of the other side of the extension rod (1a). A support block (4a) is arranged on the inside of the operating rod (4). An extension column (6a) is arranged on the edge of the side of the dial (1) where the engaging part is arranged. An indented part (6a-1) is arranged at an end of the extension column (6a). When the dial (1) is in a closed-and-locked up state, the protruding block (1b) presses on the support block; when the dial (1) is in an open-and-locked in state, the engaging part (1c) engages onto the indented part (6a-1). The present invention allows for reduced occurrence of misoperation, for reduced operation burden, and for increased operation efficiency.

IPC Classes  ?

• B24B 9/00 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor
• B24B 23/00 - Portable grinding machines, e.g. hand-guidedAccessories therefor
• B24B 55/05 - Protective covers for the grinding wheel specially designed for portable grinding machines
• B25F 5/02 - Construction of casings, bodies or handles

Abstract

An electric angle grinder having an open-and-locked in feature, comprising a housing (6), an operating rod (4), and a dial (1). The operating rod (4) is connected at both ends thereof to a housing (6) and is for use in operating a switch part (5) of the electric angle grinder. A gap for installing the dial (1) is formed on the operating rod (4), while the dial (1) is arranged within the gap. A rotary pin (3) is arranged on the dial (1). A portion of the dial (1) is exposed outside of the operating rod (4), while the remaining portion of the dial (1) is arranged within the housing (6). The portion of the dial (1) arranged within the housing (6) is connected to an extension rod (1a). A protruding block (1b) is arranged on one side of the extension rod (1a), while an engaging part (1c) is arranged on the end at the other side of the extension rod (1a). A support block (4a) is arranged on the inside of the operating rod (4). An extension column (6a) is arranged on the edge of the side of the dial (1) where the engaging part is arranged. An indented part (6a-1) is arranged at an end of the extension column (6a). When the dial (1) is in a closed-and-locked up state, the protruding block (1b) presses onto the support block; when the dial (1) is in an open-and-locked in state, the engaging part (1c) engages onto the indented part (6a-1). The present invention allows for reduced occurrence of misoperation, for reduced operation burden, and for increased operation efficiency.

IPC Classes  ?

• B24B 9/00 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor
• B24B 23/00 - Portable grinding machines, e.g. hand-guidedAccessories therefor
• B24B 55/05 - Protective covers for the grinding wheel specially designed for portable grinding machines
• B24B 5/02 - Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfacesAccessories therefor involving centres or chucks for holding work

Abstract

A sanding tool protecting device comprises a protecting cover (1), a protecting cover hold hoop (3), a front cover (4), an O-shaped ring (5) and a screw (6). The protecting cover hold hoop is disposed below the protecting cover through the screw. An upper end of the front cover is disposed in the protecting cover and a center hole of the protecting cover hold hoop. The O-shaped ring is disposed in a predetermined groove located at a lower end of the front cover. A pull-pin type elastic locking mechanism is disposed in the protecting cover hold hoop and is composed of a brake member (2) and a torsion spring (8). The tail end of the torsion spring is connected to the brake member. One end of the brake member is disposed outside the protecting cover hold hoop, and the other end of the brake member is disposed in a groove of the front cover. A scale division member (7) is disposed in the protecting cover hold hoop. An operator can implement assembly and disassembly of the protecting cover, angle adjustment and locking operations by simply pulling or releasing the brake member in the pull-pin type elastic locking mechanism without using any tool. Therefore, the sanding tool protecting device is convenient to operate and simple in structure.

IPC Classes  ?

• B24B 55/04 - Protective covers for the grinding wheel
• B24B 23/02 - Portable grinding machines, e.g. hand-guidedAccessories therefor with rotating grinding toolsAccessories therefor

Abstract

A cutting saw with a safety protection device comprises a base (4) used for placing a workpiece to be cut. A support arm (9) is arranged on the base (4), and connected with a saw blade (5) via a power head; a fan-shaped fixed protecting cover (2) and a fan-shaped movable protecting cover (3) which are oppositely folded to form a whole circle are arranged on the saw blade (5); an extension arm (10) is arranged at the upper end of the support arm (9), one end of a protecting cover connection rod (7) is connected with the movable protecting cover (3), and an arc bypass elbow at the other end of the protecting cover connection rod (7) is connected with a limit button (13) and the extension arm (10) through an axial-position screw (11). The lower end of the limit button (13) is provided with an arc bayonet (14) matched with the radian of the arc bypass elbow of the protecting cover connection rod (7). The movement of the protecting cover connection rod is thoroughly locked and the movable protecting cover is ensured not to turn up during the periods of charge and discharge operations for the workpiece, thus avoiding that the movable protecting cover of the previous safety protection device may still turn up during this period causing an accident; simultaneously, the cutting saw is simple in structure and convenient in assembly.

IPC Classes  ?

• B23D 47/00 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
• B23D 59/00 - Accessories specially designed for sawing machines or sawing devices
• B23Q 11/06 - Safety devices for circular cutters

Abstract

A cutting saw with a safety cover is disclosed. The cutting saw comprises: a base (4) for placing a workpiece to be processed, a support arm (9) hinged to the base (4), a power supply provided on the support arm (9), a saw blade (5) rotated by the power supply, a sector fixed cover (2) and a movable cover (3) substantially combined to a full circle by which the saw blade (5) may be covered. The support arm (9) is provided with an extension arm (10), a first positioning screw (11) is fixed on the extension arm (10), a second positioning screw (13) is set bypass the first positioning screw (11), one end of a cover connecting rod (7) is hinged on the position near the center of rotation of the movable cover (3), and the other end of the cover connecting rod (7) is chucked on the first positioning screw (11) through the sector fixed cover (2). The safety cover can ensure that the movable cover would not turned up accidentally during the loading-unloading operations of the workpiece while keeping the original turnup action performance of the movable cover.

IPC Classes  ?

• B23D 47/00 - Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
• B23D 59/00 - Accessories specially designed for sawing machines or sawing devices
• B23Q 11/06 - Safety devices for circular cutters