30 results about "Screw axis" patented technology

A fan wheel (1) with a plurality of fan wheel blades (10) and a fan wheel hub (20) can be fixed to a motor (30) in order to drive the fan wheel (1) about a rotation axis (X) that extends centrally through the fan wheel hub (20). Each of the fan wheel blades (10) can be screwed to the fan wheel hub (20) by at least one screw (41, 42). A longitudinal screw axis (L) extends parallel to the rotation axis (X). The fan wheel hub (20) has a corresponding screw receptacle (21, 22) for each of the screws (41, 42).

Planetary gear set with a planet carrier (5) and a planet gear shaft (2), wherein one area of ​​the planetary support (5) is shaped as a first cheek, wherein the first cheek has an axially through recess into which the planet gear axis (2) is at least partially inserted, characterized by the fact that an axially directed threaded bore is provided in the end face of the planet gear shaft (2), wherein a screw (4) is screwed into the axially directed threaded bore, so that a spring element (6) is pre-tensioned, which secures the screw connection between screw (4) and planet gear shaft (2), wherein the area axially covered by the screw (4) overlaps at least with the axial area covered by the recess, wherein the spring element (6) is pre-tensioned and / or presses against the wall of the recess, wherein a planet gear (1) is rotatably mounted on the planet gear axis (2) by means of a bearing, wherein the planet gear (1) is positioned against a collar of the planet gear axle (2), wherein the screw (4) has a screw head, wherein the spring element (6) is arranged axially between the screw head and the end face of the planet gear shaft (2), wherein the spring element (6) is designed as a perforated disc, the axially covered area of ​​which shifts monotonically in the axial direction with increasing radial distance from the screw axis and / or central axis of the planet gear axis (2), wherein the outer edge of the perforated disc touches the wall of the recess and the inner edge of the perforated disc touches the screw (4), wherein the planet gear axle (2) has a collar with which it is positioned against the planet carrier (5), namely against an edge of the recess of the planet carrier (5).

A riflescope with a scope body has a movable optical element defining an optical axis connected to the scope body. The riflescope also has a turret having an outer knob and a turret screw defining a screw axis and operably connected to the optical element for changing the optical axis in response to rotation of the turret screw. The riflescope also includes a zero-adjustment assembly contained within the turret and operably interfacing with the turret screw. The zero-adjustment assembly comprises a zero-adjustment disc and a locking collar disposed around a downward facing central shaft of the zero-adjustment disc. The zero-adjustment disc is contained in an upper recess of the outer knob. The locking collar has a first position in which the zero-adjustment disc is freely rotatable about the turret screw and a second position in which free rotation of the zero-adjustment disc is prevented.

The screw system for joining components requiring high clamping forces for the screw connection, wherein the screw system comprises a screw unit connected to an articulated robot arm, which includes a motor for the rotary drive, a torque shaft, a tool holder for a screw tool and a feed head, which lie on a common screw axis, is characterized in that the screw unit is pivotably mounted about a ball-shaped joint which is arranged in the screw axis, so that a deflection of a robot axis of the articulated robot arm due to clamping forces and a resulting tilt of the screw unit is compensated by pivoting it, so that the screw axis maintains its perpendicular position to the plane of the components to be joined.

A six-axis agile shooting device includes a base assembly, shooting assemblies, and six motion assemblies, a linear directional axis motion assembly is configured to drive a flipping directional axis motion assembly to move, the flipping directional axis motion assembly is configured to drive an infinite rotating motion assembly to flip, the infinite rotating motion assembly includes rotating platform assemblies provided with shooting workstations correspondingly, a gantry is fixed to the base assembly, a linear lead screw axis motion assembly is connected to a lead screw lifting axis motion assembly and configured to drive the lead screw lifting axis motion assembly to move, the lead screw lifting axis motion assembly is connected to a rotating axis motion assembly and configured to drive the rotating axis motion assembly to move, and the rotating axis motion assembly is connected to shooting assemblies and configured to drive the shooting assemblies to flip and shoot.

This utility model discloses a convenient clamping roller spacing adjustment mechanism, including a mounting frame with a first mounting seat, a first rotating roller, a second rotating roller, a cylinder, and an adjustment component that works with the cylinder to adjust the spacing between the first and second rotating rollers. The first mounting seat is rotatably mounted on the mounting frame via a rotating shaft, and the first rotating roller is rotatably mounted on the first mounting seat. The axial direction of the first rotating roller is not aligned with the axial direction of the rotating shaft. The cylinder drives the first mounting seat to rotate, causing the first rotating roller to move closer to or away from the second rotating roller. The adjustment component includes a screw and a push block. The screw drives the push block to move along the screw axis, and the push block has an inclined surface that adjusts the spacing between the first and second rotating rollers as the push block moves. The cylinder quickly moves the first and second rotating rollers apart and then closer to clamp the silicone flame-retardant pad. When adjustment is needed, the adjustment component is used for fine adjustment, solving the problems of time-consuming, labor-intensive, and inefficient adjustment.

The utility model relates to the technical field of fixing tools, and discloses a tool clamp for tubular parts, which comprises a base, a placing groove is arranged on the upper surface of a connecting plate, a fixing plate is mounted in the placing groove, a cylinder is mounted at one end of the fixing plate, and an extrusion plate is arranged on the outer surface of the cylinder. By rotating the knob of the fixing structure, the knob drives the one-way screw rod to rotate synchronously, the one-way screw rod is meshed with the sliding block through threads, when the one-way screw rod rotates, the sliding block moves linearly in the axis direction of the one-way screw rod, and when the sliding block moves, the extrusion plate is pushed or pulled through the hinged second connecting rod; the first connecting rod is fixed along with the column body to form a four-connecting-rod mechanism, so that when the extrusion plate generates radial displacement and the sliding block moves towards one side far away from the rotary knob, the extrusion plate compresses the inner wall of the annular workpiece, in the process, part of annular workpieces with different inner diameters can be effectively fixed, and the position of the annular workpiece is prevented from deviating.

The aim of the present invention is to solve or significantly reduce the phenomenon of unintentional unscrewing in bolt mechanics as a result of vibrations, forces or rotations This aim can be achieved by applying the following technical solution: the use of a screw characterised by the presence of two threaded stems separated by an unthreaded stem with a smaller diameter than the other stems, and a special nut, which is matched to the final thread of the screw. The nut is free to slip, rotate and misalign itself from the screwing axis when it reaches the unthreaded stem, making unintentional unscrewing impossible. This technical solution can be applied in the context of industrial accident prevention, related to the unintentional unscrewing of fasteners.

The utility model discloses a screw taking-out device, which belongs to the technical field of aeronautical manufacturing and maintenance and comprises a sleeve, a locking ring, a cylindrical rolling shaft and the like, the cross section of an inner hole of the sleeve is a triangle-like shape formed by connecting three linear sections and three arc sections at intervals, the locking ring is provided with three strip-shaped cylindrical rolling grooves, and the cylindrical rolling shaft is arranged in the cylindrical rolling grooves. And the two are combined and then placed and limited in the inner hole of the sleeve. During use, the screw rod is inserted among the three cylindrical rolling shafts in the locking ring, the outer sides of the cylindrical rolling shafts are adjacent to the arc section of the inner hole in a non-extrusion state, the sleeve is rotated, the cylindrical rolling shafts slide to the linear section of the inner hole under the friction force action of threads of the screw rod, the screw rod is clamped by the cylindrical rolling shafts, and the sleeve is continuously rotated to screw out the screw rod. When the screw rod is disassembled, torque applied to the screw rod acts on the axis of the screw rod, the screw rod is prevented from being broken in the rotating and taking-out process, the quality of a product fastened by a bolt is guaranteed, and meanwhile the disassembling work efficiency is not affected.

A screwdriving system is provided for fastening components that require high contact pressures and includes a screwdriving unit connected to an articulated robot, where the screwdriving unit includes a rotary drive, a torque shaft, a tool holder for a screwdriving tool and a feed head. The tool holder and the feed head are located on a common screw axis, where the screwdriving unit is mounted so as to be pivotable about a ball-like joint arranged in the common screw axis, so that a deflection of a robot axis of the articulated robot caused by high contact pressures and a resulting tilted position of the screwdriving unit is compensated by pivoting of the screwdriving unit, such that the common screw axis maintains a perpendicular position with respect to a plane of the components being fastened.

A riflescope with a scope body has a movable optical element defining an optical axis connected to the scope body. The riflescope also has a turret having an outer knob and a turret screw defining a screw axis and operably connected to the optical element for changing the optical axis in response to rotation of the turret screw. The riflescope also includes a zero-adjustment assembly contained within the turret and operably interfacing with the turret screw. The zero-adjustment assembly comprises a zero-adjustment disc and a locking collar disposed around a downward facing central shaft of the zero-adjustment disc. The zero-adjustment disc is contained in an upper recess of the outer knob. The locking collar has a first position in which the zero-adjustment disc is freely rotatable about the turret screw and a second position in which free rotation of the zero-adjustment disc is prevented.

The application discloses a percutaneous minimally invasive porous pedicle screw, which comprises a screw tip, a screw body and a screw seat; the screw is integrally formed by using an additive manufacturing technology; the screw body comprises a threaded segment, the thread teeth of the threaded segment are formed by a dense solid metal, and the screw groove bottoms and the screw rod main body region between the thread teeth are formed by a three-dimensionally communicated porous structure; the screw is provided with a through minimally invasive hole along an axis; a bone cement hole which is in communication with the outside is arranged on the side wall of the minimally invasive hole; the edge of the bone cement hole is provided with a solid wall with a thickness of 0.2-0.4 mm; the minimally invasive hole is arranged on the screw axis, and the bone cement hole which is in communication with the outside is arranged on the side wall of the minimally invasive hole, so that the problems, such as jamming, deviation from the track and generation of metal debris due to the rough edges of the porous structure, and outflow and solidification of bone cement at the specified position, can be effectively avoided; and the design that the thread teeth are in a solid structure and the screw rod main body between the thread teeth is a three-dimensionally communicated porous structure guarantees the mechanical strength and instant holding force of the screw.

A guide rail side-mounted vertical shaft lead screw lifting module comprises a rack, a motor, a lifting frame and a guide rail. The motor is arranged on the rack, a lead screw is fixed to an output shaft of the motor, and a lead screw nut seat is arranged on the lead screw in a matched mode. The lifting frame is fixedly connected with the lead screw nut seat; the two guide rails are arranged on one side of the rack; a sliding block is arranged on the guide rail in a matched mode, and a threaded hole is formed in the sliding block. Connecting blocks are arranged on the two sides of the lifting frame, through holes corresponding to the threaded holes are formed in the connecting blocks, and the diameter of the through holes is larger than that of the threaded holes. The guide rail is connected to a limiting plate through screws, the limiting plate is fixed to the rack, a step is arranged on the side, close to the lifting frame, of the limiting plate, and the guide rail is attached to the step. The screw between the connecting sliding block and the connecting block is unscrewed, the size error caused by machining and mounting between the axis of the lead screw and the axis of the guide rail is compensated through the gap between the screw and the through hole, then the screw between the connecting sliding block and the connecting block is screwed, and adjustment is more convenient.

This utility model relates to the field of ultrafine powder grinding technology, specifically to a separator for a wet grinding mill. It includes a separator assembly comprising a housing with a top opening and a sealing cover on top of the housing. In this utility model, when a servo motor drives a lead screw to rotate, the vertical groove constrains the movement direction of the connecting plate, causing the nut to move vertically upwards along the lead screw, thereby synchronously raising the sealing cover. When the connecting plate moves to the position where the vertical groove and the horizontal groove connect, the horizontal groove releases the constraint on the rotation of the connecting plate, and the connecting plate then rotates into the horizontal groove, causing the sealing cover to detach from the housing and rotate around the lead screw axis. When the connecting plate reaches the end of the horizontal groove, the servo motor stops running. At this point, the sealing cover has completely moved out from directly above the housing, allowing the operator to easily remove the separator sieve from the housing, improving the replacement efficiency of the separator sieve and making operation and maintenance simpler and more efficient.

The present application relates to the equipment of reactor control rod safety protection, specifically relates to the device and simulation equipment for simulating the operation of rotor driving mechanism under the condition of inclined overturning, the device comprises: a support; a test body, the middle section of the test body is hinged to the support, and the test body is used for rotating around the hinge; and a traction assembly, the traction assembly is movably arranged on the support, the lead screw of the test body is connected with the traction assembly, and the lead screw of the test body is used for driving the lead screw to move along the lead screw axis direction when the traction assembly moves. By adopting the above-mentioned device for simulating the operation of rotor driving mechanism under the condition of inclined overturning, the prototype structure and the interaction relationship can be simulated more truly, without using the prototype size lead screw, control rod assembly and the like, compared with the traditional simulation device, the installation space of the simulation device is greatly reduced.

The invention relates to a connection system (10) for connecting at least two, in particular plate-like, elements, comprising a bolt (12), a nut (14) corresponding to the bolt (12) and having a screwing channel (17) extending along a screwing axis (15) into which the bolt (12) can be screwed, and a holder (16) for receiving the nut (14), wherein the nut (14) has a foot portion (22) and a head portion (20) adjoining the foot portion along the screwing axis (15), the foot portion (22) at least partially projecting beyond the head portion (20) in a direction perpendicular to the screwing axis (15). The invention also relates to an assembly (11) comprising such a connection system (10).

A tool (10a, 10b) for holding two fastening screws (12a, 12b) that can be inserted from the inside through coaxial bores of a control arm (14) is characterized in that the tool (10a, 10b) comprises a carrier (24) on which a slidable but circumferentially rotationally fixed fixing nut (26a, 26b) for mounting onto the screw head (18a, 18b) is attached at each end, wherein a centering sleeve (27a, 27b) is slidably arranged radially outside on each fixing nut (26a, 26b) for mounting onto a screw collar (20a, 20b) for centering to a screw axis (A), wherein the two centering sleeves (27a, 27b) are jointly moved axially apart by means of an actuator (34a, 34b) and thus engage with the screw collars (20a, 20b) are movable, and compression springs (31) are arranged between the fixing nuts (26a, 26b) and the centering sleeves (27a, 27b), whereby the moved centering sleeves (27a, 27b) carry the fixing nuts (26a, 26b),to engage them with the screw heads (18a, 18b).

This utility model discloses a screw removal tool, belonging to the technical field of removal tools. It includes: two symmetrically arranged frames, one end of which is equipped with a traction mechanism. Bolts are mounted on the traction mechanism and are detachably inserted into the connection holes of a screw cover plate; and an installation mechanism that is movably engaged between the two frames. During the removal of stripped screws, this screw removal tool utilizes the coordinated operation of the frames, traction mechanism, installation mechanism, and tool assembly to enable the tool's cutting edge to adaptively align with the screw axis and apply force evenly along the axial direction. The adjustable preload provided by the traction mechanism continuously presses the tool against the screw end face, thereby efficiently converting the torque applied by the wrench into rotational force. This avoids problems such as free rotation caused by stripping in traditional disassembly, achieving a smooth, labor-saving, safe, and convenient disassembly process.

The utility model discloses a stainless steel fine-thread small-knife-edge screw which comprises a screw body, a joint is integrally formed at the end of the screw body, the screw body and the joint are both made of stainless steel materials, and a fine-thread screw is arranged on the outer wall of the screw body and extends to the surface of the joint. The connecting outer wall is provided with an axial cutting part and an oblique cutting part, the axial cutting part is arranged in the axis direction of the screw body, a certain angle is formed between the oblique cutting part and the axis of the screw, and the axial cutting part and the oblique cutting part both penetrate through the fine thread. Through the design of the axial cutting groove and the inclined cutting groove, the axial cutting groove ensures that the screw stably advances along a preset path in the screwing-in process, deflection is avoided, the inclined cutting groove effectively cuts materials through the edge sharpening design, material cracking or deformation caused by extrusion is reduced, and the service life of the screw is prolonged. The problem that a traditional screw is prone to causing material damage in the soft material assembling process is effectively solved, and the assembling quality and efficiency are improved.

The invention relates to the technical field of building structure foundation test equipment, and discloses a self-tapping screw pull-out test device which comprises an upper clamp, a lower clamp and a pressure equalizing assembly. The upper clamp is of a split adjustable clamping structure and is matched with clamping cavities of self-tapping screws with different outer diameter specifications, stable clamping is achieved, a modularized base material mounting platform of the lower clamp is combined with a sliding groove structure and a positioning pin, the vertical height and the horizontal position of a base material can be adjusted in cooperation with adjustable bolts of the vertical anchor rod and the transverse anchor rod, and the clamping effect is good. A concave arc-shaped elastic pad and a rhombic bulge of the pressure equalizing assembly not only enhance contact friction force and prevent slipping, but also disperse stress through elastic deformation to avoid local pressure loss of a base material, so that the service life of the screw is prolonged, and the service life of the screw is prolonged. Therefore, the clamping adaptability, the centering accuracy, the stress uniformity and the displacement measurement accuracy can be improved, and the device is suitable for testing of various base materials and screws of different specifications, so that the authenticity and reliability of test data are greatly improved.

Body structure for a vehicle in the front section of which a front longitudinal member (1) runs on each side of the vehicle, the longitudinal member being a hollow profile part with a longitudinal member base (3) and a longitudinal member top wall (5) as well as inner and outer flanks (7, 9) connecting the longitudinal member base (3) to the longitudinal member top wall (5), wherein a subframe mounting bracket (29) is attached to the longitudinal member base (3), characterized in that the subframe mounting bracket (29) has a projecting structure (31) which extends beyond the longitudinal member (1) towards the interior of the vehicle, and that the projecting structure (31) of the subframe mounting bracket (29) has a subframe attachment point (B), wherein the subframe attachment point (B), in particular its screw axis, is offset by a lateral offset (Δy) from the longitudinal member inner flank (7) towards the interior of the vehicle.

This application relates to the field of feeding screws, and particularly to a screw specifically designed for civilian PET applications. It includes a mixing section and a homogenizing section. The homogenizing section is located at the rear end of the mixing section. The mixing section has several sets of barrier grooves, all inclined to the screw axis. Each set of barrier grooves includes a first barrier groove and a second barrier groove. A material channel is provided on the side of the first barrier groove, connecting to the second barrier groove in the same set. The cross-sectional area of ​​the material channel is smaller than that of the first and second barrier grooves. One end of the second barrier groove extends into the homogenizing section. Pins are provided on the homogenizing section, arranged in a diamond pattern. This application provides a civilian PET-specific screw that solves the problem of reduced product strength due to uneven plasticization caused by traditional screws, and offers high plasticization efficiency, energy saving, durability, and uniform plasticization.

This invention discloses a slotted planetary roller screw, comprising: a screw, a nut, rollers, a cage, a reversing key, and a locating pin. The nut has a circumferential notch. The rollers are evenly distributed circumferentially between the screw and the nut, and their outer surfaces have multiple rows of arc-shaped annular grooves. The cage is sleeved on the outer circumference of the screw and located inside the nut. The cage has a vertical groove parallel to the screw axis. The rollers are rotatably placed in the vertical groove and constrained to always engage with the screw and the nut simultaneously. The reversing key is embedded in the notch and fixed to the nut by the locating pin. The reversing key has a groove, which smoothly connects with the nut's internal thread on both sides of the notch to form a closed channel for roller circulation. The mean diameter curve of the groove is constructed as a quintic parabola. The slotted planetary roller screw of this invention allows the reversing key groove to constrain the rollers during roller circulation, connecting the nut thread with a quintic parabola, reducing impact and noise, and improving the smoothness of roller circulation.

An automatic screwing system for fastening a component is provided. A screw-screwing system for fastening a component requiring high contact pressure for screw-fastening thereof, having a screw-screwing unit connected to an articulated robot, the screw-screwing unit comprising a motor for rotational drive, a torque shaft located on a common screw axis, a tool holder for a screw-screwing tool and a feed head, the invention is characterized in that the screw-screwing unit is mounted so as to be pivotable about a ball joint arranged on the screw axis, such that a deflection of the robot shaft of the articulated robot caused by the contact pressure and a resulting tilt position of the screw-screwing unit are compensated by pivoting of the screw-screwing unit, such that the screw axis maintains its vertical position with respect to the plane of the component being fastened.

An assembly involving at least one exterior bodywork element of a motor vehicle, the assembly comprising a first part (1) forming an exterior bodywork element of the vehicle and a second part (2) carrying at least one exterior lighting element; the first part comprising a mounting tab (10), projecting from a body of the first part along a screw axis (A), with a distal bearing face (11) and a mounting shank (3); the second part comprising an assembly well with a well bottom wall (21), and an oblong hole (4); a fixing screw (5) comprising a head (51) and a shank (52), the mounting shank being framed by two guide pins (6), projecting from the distal bearing face to a height slightly less than the thickness (E1) of the well bottom wall. Figure 2

The invention discloses a cable mounting device with a folding and unfolding framework. The cable mounting device comprises a fixed base, an insulating pad, a gland and a rotary buckle, the fixed base provides a curved surface connected with a framework and a binding groove and is an external interface of the device. The insulation pad and the gland are attached through the groove, and a limiting measure is taken, so that an insulation protection effect is achieved. The gland is connected with the fixed base through two ends, one end is of a bolt type structure, and the other end is connected through a screw. The rotary buckle is provided with a limiting pin, is connected with the gland through a screw and can rotate by a certain angle along the axis of the screw, the torsion stress of the cable is released in the folding and unfolding process of the rod piece, and the cable is prevented from being damaged. According to the invention, a set of mounting device is adopted, the fixation of a flat cable and a round cable is realized, the cable can be folded and folded along with the framework, the path of the cable is controllable and the stress is minimum in the moving process, the problem of cable winding and hooking is effectively solved, and the reliability of the system is obviously improved.

The application discloses an extruder, which comprises a cylinder, a screw, a driving part and a heater. The screw is rotatably arranged in the cylinder and a spiral material channel is formed between the screw and the cylinder. The driving part is connected with the screw and used for driving the screw to rotate. The heater is arranged at least one and sleeved on the cylinder. The end surface of the heater and the cross section perpendicular to the screw axis have a certain angle. The extruder can improve the heating efficiency of the material.

The utility model discloses an anti-loosening inner hexagon screw which comprises a screw head portion and a screw rod portion, a first thread is arranged on the screw rod portion, a second thread is arranged at the position, close to the screw head portion, of the screw rod portion, the second thread and the first thread are reverse threads, an anti-loosening block is arranged on the screw rod portion, and the anti-loosening block is arranged on the screw rod portion. The anti-loosening block is connected with the screw rod part through a second thread, a plurality of anti-loosening nails are arranged on the anti-loosening block, the axes of the anti-loosening nails are parallel to the axis of the screw, the anti-loosening nails are in threaded connection with the anti-loosening block, the tip ends of the anti-loosening nails can penetrate through the anti-loosening block, multiple anti-loosening is achieved, meanwhile, the anti-loosening structure is connected in a staged mode, the screw does not need to be completely rotated, and the anti-loosening effect is good. And more labor is saved.