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8758 results about "Knife holder" patented technology

High-speed, hand-held reciprocating method for cutting, carving, sawing, chiseling, filing, sanding, and engraving

A high-speed, hand-held attachment for flex rotor shafts of power rotary tools, and also for direct attachment to power rotary tools without flex rotor shafts, that converts rotary motion to reciprocating motion for precision control of cutting, carving, sawing, chiseling, filing, sanding, and engraving on delicate work pieces. The attachment is one assembly comprising a one-piece front one-piece enclosure (20), a rear one-piece enclosure (30), a high-speed bearing (22), a one-piece rotating piece (40) with integral cam groove, a one-piece reciprocating piece (50) with an integral cam follower on one end and with its other, exposed end accomodating the attachment of a chuck or collet and with geometry to prevent rotation, and a thumbscrew (32). Rotating piece (40) attaches directly to the rotary power source and provides the cam action drive to reciprocating piece (50). Bearing (22) provides rotative support for the other end of rotating piece (40). Reciprocating piece (50) slidably mounts in front one-piece enclosure (20). Front one-piece enclosure (20) and rear one-piece enclosure (30) are attached to each other and maintain proper alignment for rotating piece (40), bearing (22), and reciprocating piece (50). Thumbscrew (32) secures the attachment to the flex rotor shaft of a power rotary tool. A tool holder / collet is attached to the exposed end of reciprocating piece (50) whereby numerous types of cutting tools may be utilized. Alternative versions of the rear one-piece enclosure, (30A) and (30B), described herein, allow for attachment directly to power rotary tools without flex rotor shafts. Alternative versions of the reciprocating piece, (50A), (50B), and (50C), and of the rotating piece, (40A), are also described herein.
Owner:JONES WILLIAM RANDOLPH

Rotary hammer

A tool holder attachable to a spindle of a hammer and which can receive a bit, the bit having a shank with at least one retaining groove extending along part of the shank, the retaining groove having a defined length, a front end and a rear end that limit axial movement of the bit in the tool holder, which tool holder comprises a hollow cylinder having an axis, an axial bore, a rear end that can be attached to the spindle of the hammer, and a front end that can receive the shank of the bit so that the bit is slidable within the cylinder in an axial direction, at least one retaining element that is located so that it can extend radially into the bore of the cylinder and into the at least one retaining groove of the bit so that the retaining element can be hit by the rear end of the retaining groove during the transition to idling and limit the extent of axial movement of the bit within the cylinder, at least one radial restraining element limiting movement of the retaining element in the radial direction, at least one axial restraining block limiting movement of the retaining element in the axial direction, when hit by the retaining element the axial restraining block movable to a limited extent in the axial direction with respect to the radial restraining element, and a resilient element located forward of the axial restraining block and arranged so as to attenuate the impact transmitted through the axial restraining block from the retaining element.
Owner:BLACK & DECKER INC

Cutting trimming device of conveyer belt

The invention relates to mining mechanical equipment, in particular to a conveyor belt cutting and dressing machine, which consists of a pedestal, a drive device, a conveyor belt device, a main tool post, an auxiliary tool post, a carrier roller, a guide wheel, a saddle, a guide groove, a belt hold roller and an electric control box; the drive device consists of an electric motor and a gear box; the conveyor belt device consists of an upright post bracket, a conveyor belt driving roller, a conveyor belt pressing roller and a feed screw nut; the gear box and the conveyor belt driving roller are connected through chains; the front end and the rear end of the drive device are provided with the main tool post and the auxiliary tool post; the tool posts are provided with cutting knives or saw bits driven by a small-power motor; the rear end of the auxiliary tool post is provided with the guide wheel; the rear end of the guide wheel is provided with the carrier roller; the saddle is arranged on the pedestal; the guide groove and the belt hold roller are arranged on the saddle; and a road wheel is arranged at the bottom of the pedestal. The mining mechanical equipment is used for the trimming, the reshaping and the width modification of the conveyor belt, realizes the waste utilization, saves energy resources, reduces the cost and labor intensity, improves the production efficiency, and has a simple structure and convenient operation.
Owner:兖矿能源集团股份有限公司

Machining machine tool for valve body valve rod hole

The invention provides a machining machine tool for a valve body valve rod hole, belonging to the technical field of machinery. The problems that the traditional valve body machining machine tool has complex structure and big energy consumption, the valve body valve rod hole can not be machined and the like can be solved. The machining machine tool for a valve body valve rod hole comprises a tool body, a feeding hopper and a main spindle box fixedly connected to the tool body; the tool body is provided with a lateral guide rail; the lateral guide rail is provided with a machining tool rest used for machining a valve rod hole; the main spindle end of the main spindle box is fixedly connected with a fixture which is used for clamping the valve body and causes a bulge used for machining the valve rod hole on the valve body to face to the machining tool rest; the too body is provided with a conveyer mechanism used for conveying the valve body to be machined in the feeding hopper to the fixture of the main spindle in a positioning mode; and the machine tool body is also provided with a driving mechanism which pushes the machining tool rest to cause the machining tool rest to machine the valve body when the valve body to be machined is positioned in the fixture. The machining machine tool for a valve body valve rod hole has the advantages of high automation degree, high machining efficiency, good product consistency and the like.
Owner:杨建龙 +1

Self loading utility knife

A self-loading utility knife including an elongate handle having an internal chamber defining an axis and at one end is flat aperture for the passage of an active blade. The flat aperture defines a cutting plane extending through said handle along the axis. A blade-holder is slidably mounted in the chamber for movements in directions along the axis and is adapted to secure a single active blade for movement through the aperture when the blade holder is in the extended position. A blade-holder release button is coupled to the blade holder and is slidingly movable relative to the handle to move blade holder between retracted and extended positions. The handle has a blade compartment which is open to the chamber and can receive a stack of spare blades when a cover to the compartment is opened and blades can be shifted transversely relative to the axis into the chamber. The blade holder is provided with a recess having a depth no greater than the thickness of one blade to allow at least a portion of a single blade to be received in a retaining relationship within the recess to cause an end-most blade in the stack to be received within said recess to follow the movements of the blade holder. A spring biases the blades in the blade compartment inwardly in the direction of the blade holder. A blade releasing disc on the blade holder selectively locks a blade to the blade holder when the blade holder is in the extended position. The blade holder only receives a single blade within the recess. A belt clip s provided on the compartment cover.
Owner:HAO WEN
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