摘要:
A screwdriver adapter (1) is provided with a receiving part (3) having an interior space (5). At the open end of the pot-shaped receiving part (3) there is inserted a nut-shaped element (2) in torsionally rigid and axially secured relationship. Adjoining the tool driving means (6) there is disposed a channel (8), which passes axially through the nut-shaped element (2) and extends as far as the interior space (5) of the receiving part (3). Drive portions broken off by overtorquing a screw in the tool driving means (6) can travel via the channel (8) into the interior space (5) of the receiving part (3), where they can be collected until an emptying process.
摘要:
A blind rivet-type clamping fastener includes a deformable sleeve, a drift section insertable into or connectable to the sleeve, and a drilling section. The latter is held on either the sleeve or a drift section so that it can be axially moved towards the free end of the fastener or removed therefrom upon exertion of an axial force onto the drilling section during the setting of the clamping fastener.
摘要:
A washer (14) and a threaded assembly (22) between a screw (30) and a workpiece (42) are provided. The washer (14) is offset up to an angle (α) with respect to a flat initial state, such that the washer has an insert thickness (De) that is substantially greater than the initial thickness (Da) thereof. The washer (14) is made of a malleable material. The length (Lg) of an unthreaded shank section (40) of the screw (30) is smaller than the sum of the thickness (Dw) of the workpiece (42) and the insert thickness (De) of the washer (14), and essentially not smaller than the sum of the thickness (Dw) of the workpiece (14) and the insert thickness (Da) of the washer (14). When the last thread of the screw (30) leaves the workpiece (42) on being screwed in, the force previously exerted on the washer (14) by the feed of the screw is zero. The washer (14) has been plastically deformed thereby, such that the washer retains the flattened state thereof and bridges the space between the workpiece (42) and the screw head (34) free from play. The workpiece (42) and the washer (14) thereby remain firmly clamped between the head (34) and the thread (36) of the screw (30), and the prevention of inverse rotation is ensured.
摘要:
A screw is provided having an at least partially threaded (4) shank (7) and a screw head (3). An unthreaded section (2) is provided between the screw head (3) and the thread (4). The thread (4), at least in the distal area of the shank (7) facing the screw head (3) is provided with a groove (5), notch, slot, or the like crossing the thread (4).
摘要:
A self-tapping screw having a boring part and a threaded shaft for fixing a panel-type object to a preferably metallic substructure is provided. The screw is configured in such a way that it produces a through hole in the panel type object, said hole accommodating the shaft with a degree of play and so that it produces a bore in the substructure into which the thread on the shaft cuts a counter-thread. The boring part includes a boring tip that is located eccentrically in relation to the longitudinal axis of the screw. The tip centers the screw during the positioning operation in such a way that the boring part executes a circular displacement about the boring tip, which expands the through hole to the desired size, whereas the bore in the substructure is produced with the diameter of the boring part. The screw replaces self-tapping screws provided with boring flights and is preferably for use with a substructure consisting of thin sheet metal through which the boring flights of conventional screws can inadvertently penetrate.
摘要:
A self-tapping screw having a boring part and a threaded shaft for fixing a panel-type object to a preferably metallic substructure is provided. The screw is configured in such a way that it produces a through hole in the panel type object, said hole accommodating the shaft with a degree of play and so that it produces a bore in the substructure into which the thread on the shaft cuts a counter-thread. The boring part includes a boring tip that is located eccentrically in relation to the longitudinal axis of the screw. The tip centers the screw during the positioning operation in such a way that the boring part executes a circular displacement about the boring tip, which expands the through hole to the desired size, whereas the bore in the substructure is produced with the diameter of the boring part. The screw replaces self-tapping screws provided with boring flights and is preferably for use with a substructure consisting of thin sheet metal through which the boring flights of conventional screws can inadvertently penetrate.
摘要:
A washer (14) and a threaded assembly (22) between a screw (30) and a workpiece (42) are provided. The washer (14) is offset up to an angle (α) with respect to a flat initial state, such that the washer has an insert thickness (De) that is substantially greater than the initial thickness (Da) thereof. The washer (14) is made of a malleable material. The length (Lg) of an unthreaded shank section (40) of the screw (30) is smaller than the sum of the thickness (Dw) of the workpiece (42) and the insert thickness (De) of the washer (14), and essentially not smaller than the sum of the thickness (Dw) of the workpiece (14) and the insert thickness (Da) of the washer (14). When the last thread of the screw (30) leaves the workpiece (42) on being screwed in, the force previously exerted on the washer (14) by the feed of the screw is zero. The washer (14) has been plastically deformed thereby, such that the washer retains the flattened state thereof and bridges the space between the workpiece (42) and the screw head (34) free from play. The workpiece (42) and the washer (14) thereby remain firmly clamped between the head (34) and the thread (36) of the screw (30), and the prevention of inverse rotation is ensured.
摘要:
A connection arrangement for boards, panels or slats (1) made from wood pr of wood materials to a metallic substructure (2) is provided. The screws (3) that are used include a screw head (4) and a shank (6) provided, at least over a portion of its length, with a thread (5). The screw (3) is screwed in from the side of the metallic substructure (2) and engages, via the shank (6) provided with the thread (5), inside the boards, panels or slats (1) made of wood or of wood materials. An essentially non-threaded shank section (7) is provided between the screw head (4) and a beginning of the thread (5) on the shank (6). The length of this non-threaded section corresponds, at least approximately, to a thickness (D) of the metallic substructure (2) through which the screw (3) is to pass. The outside diameter (A) of the thread (5) is made larger than the diameter (U) of a bore (8) made in the metallic substructure (2).
摘要:
A stamped rivet (10) for the connection of metal sheets (12, 14) to each other is provided, and includes a shaft (16) with several circumferential ribs (18) located one above another on the shaft (16), a shaft end (20) for pressing through the sheets (12, 14) for connection to each other, and a head (26). An adjacent region (30) to the shaft end (20) has no circumferential ribs and has a diameter smaller than an outside diameter (D) of the circumferential ribs. The stamped rivet (10) is easy to set as the setting device only has to be able to push the stamped rivet (10) through the sheets (12, 14) for connection. Sheet material is then forced by plastic deformation into the circumferential grooves (38) formed between the circumferential ribs (18).
摘要:
A hole-shaping and thread-forming screw (1) has a non-cutting hole-shaping end section (2) that ends in a point, a haft section (4) provided with a thread (3) and an engagement section (5). The non-cutting hole-shaping end section (2) tapers towards its end. The whole screw is made of a stainless material, in particular its end section (2). When the screw (1) is driven in, a hole is haped without cutting into the workpiece (7) and is then threaded by the screw (1) itself.