26 results about "Screw system" patented technology

The invention discloses a titanium-magnesium hollow screw system capable of promoting fracture healing and a manufacturing method. The titanium-magnesium hollow screw system comprises a titanium-based supporting structure and a magnesium filling layer. The titanium-based supporting structure comprises a main body part, the surface of the main body part is provided with an imitated bone trabecula part, and a plurality of bone gaps are formed in the imitated bone trabecula part; wherein bone gaps are filled with the magnesium filling layer, and the magnesium filling layer is combined with the titanium-based supporting structure in a physical embedding mode; the titanium-based supporting structure bears and maintains initial fixation and long-term bearing, so that the strength and the stability of the screw are ensured; the surface imitated bone trabecula and the communicated bone gaps increase the surface area and provide a physical channel for vascularization and bone tissue ingrowth, so that synostosis is promoted; the magnesium filling layer releases magnesium ions after being locally controllably degraded, so that osteogenesis and angiogenesis are favorably stimulated, the local biological environment is improved, instant mechanical support after an operation is ensured, bone healing is promoted through local biological activity release and structural orientation, the healing time is favorably shortened, and the healing quality is favorably improved.

A system for mechanical separation, comprising a platform comprising screws 20 to provide a sieving surface. The screws have parallel and neighbouring axis 4 and undergo rotational movement. At least

Provided are bone plates and systems including such plates. The present plates may be used for example, to accommodate spinolaminar junction or as a plate locking screw system for posterior spinal fixation in the cervical, thoracic, lumbar and sacral spine, extremities, pelvis and long bone fixation. The present devices and systems may include modular plates, rods and rails. Devices and systems herein relate to both open methods and minimally invasive surgery applications. Also provided are locking plates and systems relating to tethering applications. Further provided are kits including any of the present kits or devices, and methods including insertion of any of the present plates or systems into a patient.

The invention discloses a speed reducer shaft sealing structure and an installation method, and belongs to the technical field of speed reducer shaft sealing. The structure comprises a replaceable shaft sleeve arranged outside a rotating shaft in a sleeving mode, an annular groove is formed in the inner wall of the shaft sleeve and provided with an O-shaped sealing ring to form a static sealing interface, and the surface of the outer circle of the shaft sleeve is subjected to hardening treatment and is in dynamic sealing fit with a framework oil seal lip. The fastening assembly reliably fixes the shaft sleeve to the shaft body through a jackscrew system with an anti-loosening structure. The replaceable wear-resistant shaft sleeve is arranged as a sacrifice part, an easily-worn sealing interface is transferred to the low-cost shaft sleeve from a high-value shaft body, a dual-sealing system and an anti-loosening fastening structure are combined, the sealing reliability is guaranteed, meanwhile, rapid maintenance and replacement during sealing failure are achieved, the downtime of equipment is greatly shortened, and the service life of the equipment is prolonged. The maintenance cost is obviously reduced, and the service life of the sealing system under severe working conditions such as heavy load and vibration is effectively prolonged.

The utility model belongs to the technical field of double-screw extruders, and particularly relates to a double-screw extruder for preparing thermoplastic vulcanized rubber, the double-screw extruder comprises a machine barrel and a double-screw system arranged in the machine barrel, the double-screw system comprises two screws, and the double-screw system at least comprises a first section, a second section and a third section in the axial direction of the screws, the thread pitches of the screws in the first section, the second section and the third section are a1, a2 and a3 in sequence; in the first section, the second section and the third section, the minimum distance between the screw and the inner wall of the machine barrel is d1, d2 and d3 in sequence, a1 > a2 > a3, and d1 > d3 > d2. According to the preparation method, the process linkage of melting plasticizing, shearing dispersion and dynamic vulcanization and the process link collaboration in the TPV manufacturing process can be realized, so that the mechanical property stability of the TPV product can be optimized, and the problem of performance fluctuation of TPV prepared by a traditional double-screw extruder can be solved.

The utility model relates to the technical field of filling equipment, and discloses a bottle clamping and positioning device of a cap screwing machine and a cap screwing system. The bottle clamping and positioning device of the cap screwing machine comprises a bottle feeding star wheel, a bottle clamping assembly and a protection plate assembly. An elastic clamp of the bottle clamping assembly comprises two clamping arms, the middle sections of the two clamping arms are connected through an elastic piece, one end of each clamping arm is rotationally connected with a rotating star wheel of the bottle clamping assembly, and a clamping space is formed by a gap between the other ends of the two clamping arms. A groove is formed in the periphery of the bottle feeding star wheel and used for containing a bottle body, and the bottle feeding star wheel can rotate and stir one clamping arm to rotate relative to the rotating star wheel so that the bottle body can be located in the clamping space. The protection plate assembly is arranged on the periphery of the bottle clamping assembly in a surrounding mode and comprises a first protection plate and a second protection plate, and the first protection plate is used for guiding the moving direction of the bottle body when the elastic piece rotates to the first position so that the bottle body in the groove can enter the clamping space; and the second protection plate is used for pressing the bottle body in the clamping space when the elastic piece rotates to the second position.

The invention discloses a five-axis robot configuration synthesis method integrating a 2R1T parallel mechanism, and belongs to the technical field of robot manufacturing. A two-rotation and one-translation (2R1T) parallel mechanism is a core function module of a five-axis robot, most of the 2R1T parallel mechanisms are parallel mechanisms formed by connecting a plurality of kinematic pairs (such as an R pair, an S pair, a P pair, a U pair and a C pair) in series to form a kinematic branch chain and connecting a plurality of kinematic branch chains in parallel, the two ends of the kinematic branch chain are connected with a static platform and a movable platform respectively, calculation is carried out based on a PRU type kinematic branch chain, and the two-rotation and one-translation (2R1T) parallel mechanism is formed. A series of 2R1T parallel mechanism topological configurations are obtained through the spiral theory, a 2R1T parallel mechanism motion spiral system is analyzed, the 2R1T parallel mechanism and the single-degree-of-freedom joint module are reasonably configured, and it is ensured that the five-axis robot has the motion performance meeting the working requirement.

The present invention relates to a screw element (1) having a force application point (8) for an actuating tool (9), wherein the force application point (8) has a plurality of projections (10) and recesses (11) arranged in a distributed manner over a circumference about a central axis (M), wherein the projections (10) and recesses (11) are formed by alternately merging first surfaces (12) and second surfaces (13), wherein the first surfaces (12) are elliptically curved, and wherein the ellipses (14) on which a curvature of the first surfaces (12) is based are oriented radially with respect to the central axis (M) with a shorter ellipse axis. A screw element, which guarantees improved torque transmission with the best possible compatibility with known force application points, is achieved by virtue of the second surfaces (13) each having a first circular-arc-shaped partial surface (13a) and a second circular-arc-shaped partial surface (13b).

The invention relates to an automatic dismounting method for a substrate of additive manufacturing equipment, belongs to the technical field of additive manufacturing, and is used for solving one of the problems that in the prior art, the substrate dismounting convenience is poor, the substrate is not easy to dismount due to deformation, and time and labor are wasted during dismounting due to non-uniform stress of screws. The method comprises the following steps that firstly, after printing is completed, a piston assembly drives a forming base plate to ascend to the upper end of a cylinder body; and secondly, the automatic screw screwing system dismantles the screws on the base plate. According to the invention, the disassembly and assembly convenience of the existing substrate can be improved, the additive manufacturing efficiency is improved, and the additive manufacturing is not influenced by automatic disassembly of equipment.

The invention discloses an automatic powder wiping machine feeding device and method, the device comprises a first material groove, a second material groove and a connecting cylinder, two partition plates moving oppositely or reversely are movably inserted into the connecting cylinder, a plurality of through holes are formed in the surfaces of the partition plates in an array mode, and when the two partition plates move oppositely, the through holes are formed in the surfaces of the partition plates. The materials in the connecting cylinder are extruded out of the through holes through extrusion force, and material cakes are scattered. The rotating speed ratio of the double-screw system adapts to the characteristics of different materials, the mixing uniformity and the conveying efficiency are greatly improved, the two partition plates in the connecting cylinder form a unique two-way regulation and control mechanism, the materials can be accurately extruded, residues can be thoroughly cleaned, agglomerated blocks can be scattered, and the mixing uniformity and the conveying efficiency are greatly improved through extrusion and through hole shearing effects during opposite movement. During reverse movement, the material flow pressure is buffered through push-off force, overload of the second material groove is avoided, it is ensured that materials entering the small screw system are stable and uniform, and precise, efficient and low-loss operation of material conveying and mixing is achieved.

screw (100a, 100b, 100c, 100d, 100e) comprising - an upper shaft section (110) and - a lower shaft section (120) with a threaded section (125), wherein the upper shaft section (110) has a larger diameter (d1) than the diameter (d2) of the lower shaft section (120), characterized by the fact that a milling section (130, 131, 132) is provided between the upper shank section (110) and the lower shank section (120), wherein the milling section (130, 131, 132) has a larger effective cutting diameter (d3) than the diameter (d1) of the upper shank section (110).

The invention belongs to the technical field of switch cabinets, and particularly relates to a miniaturized switch cabinet with a combined drawer unit structure, a combined interlocking mechanism is arranged on the inner side of a drawer, and the combined interlocking mechanism comprises a hand-pull type mechanism module and a swing-in type module; the hand-pulling type mechanism module comprises a locking plate for locking the cabinet body and a locking connecting rod for driving the locking plate to move, the locking plate can move relative to the hand-pulling shell, and the locking connecting rod is in sliding connection with the locking plate; the rocking-in module comprises a transmission screw system, and the transmission screw system comprises a screw capable of rotating relative to the frame; by means of the structure, miniaturization of the interlocking mechanism is achieved, the space utilization rate in the drawer is effectively improved, and the drawer can be made smaller. The shaking-in mechanism is provided with an anti-idling self-locking system, so that the problem of plug-in virtual connection burnout accidents caused by the fact that the drawer cannot be accurately shaken in place during shaking-in due to misoperation in the vacant position is effectively solved.

Provided are bone plates and systems including such plates. The present plates may be used for example, to accommodate spinolaminar junction or as a plate locking screw system for posterior spinal fixation in the cervical, thoracic, lumbar and sacral spine, extremities, pelvis and long bone fixation. The present devices and systems may include modular plates, rods and rails. Devices and systems herein relate to both open methods and minimally invasive surgery applications. Also provided are locking plates and systems relating to tethering applications. Further provided are kits including any of the present kits or devices, and methods including insertion of any of the present plates or systems into a patient.

The utility model relates to soybean milk production technical field, concretely relates to a horizontal screw system for soybean milk production. The horizontal screw system for soybean milk production, include: grinding structure is connected with raw material bin and first liquid pipe respectively, first centrifugal structure communicates with grinding structure, and the discharge port of first centrifugal structure communicates with first base material pipe, and the material of grinding structure delivery separates into first base material and first intermediate material in first centrifugal structure, and the base material enters first base material pipe through the discharge port of first centrifugal structure, second centrifugal structure is connected with first centrifugal structure, and second centrifugal structure is used for centrifugal first intermediate material, to separate into second base material and second intermediate material, and the discharge port of second centrifugal structure communicates with second base material pipe, and liquid storage structure communicates with first liquid pipe and second base material pipe respectively. Second centrifugal structure can centrifugal separation again to the first intermediate material of first centrifugal structure separation, effectively improved the utilization of protein, avoided the waste of protein.

In particular, the invention relates to a functional screw system that allows skeletal support and anchorage strengthening for the expansion of the upper jaw in intraoral treatment, and distalization of teeth by shifting them individually or in groups, to be performed by a single screw operation and by drilling a single hole in the mouth, enabling multiple operations to be performed using a single fixation body.

The utility model provides a kind of feeding mechanism and screwing system, feeding mechanism includes mounting bracket, feed assembly, driving part and discharge assembly;Feed assembly and driving part are located in mounting bracket;Multiple feed channels are formed on feed assembly, and the outlet end of multiple feed channels is arranged on first circle interval;The diameter of different feed channels is different;Discharge assembly is formed with discharge channel, and the inlet end of discharge channel is located on first circle;Discharge assembly is connected with driving part, and can rotate around the axis of first circle under the drive of driving part, and then drive the inlet end of discharge channel to move on first circle, so that the inlet end of discharge channel can selectively butt joint with the outlet end of any feed channel;Feeding mechanism is used to connect with screw gun, to supply screw to screw gun, and the feeding mechanism is compatible with multiple specifications of screw, when replacing screw specification, operator does not need to manually replace the feed channel of conveying screw, reduce manual labor intensity.

The utility model relates to the field of edible fungus production equipment, in particular to a full-automatic puncturing machine for edible fungus black fungus, which comprises a transverse moving component, a longitudinal moving component, a clamping hand frame and a pneumatic clamping hand, the transverse moving component comprises a moving seat, a transverse linear guide rail, a transverse driving component and a transverse lead screw, and the transverse linear guide rail is mounted at the bottom of the moving seat; the transverse driving assembly is fixedly installed at one end of the moving seat, the transverse lead screw is rotationally installed at the bottom of the moving seat, and high-precision position control of the equipment can be achieved through cooperative work of the transverse moving assembly and the longitudinal moving assembly. The transverse servo motor and the longitudinal servo motor drive the lead screw system respectively, accurate positioning of the clamping hand frame and the movable seat is ensured, the design of the forward lead screw section, the forward and reverse lead screw section and the reverse lead screw section is adopted, proportional control (1: 3) of unfolding and gathering actions of the clamping hand frame is achieved, and movement of the clamping hand frame is more flexible and efficient.

The present invention relates to a screw element (1) with a force application (8) for an actuating tool (9), wherein the force application (8) has a plurality of projections (10) and recesses (11) distributed around a circumference about a central axis (M), wherein the projections (10) and recesses (11) are formed by alternating first surfaces (12) and second surfaces (13), wherein the first surfaces (12) are elliptically curved, and wherein the ellipses (14) underlying the curvature of the first surfaces (12) are oriented radially to the central axis (M) with a shorter ellipse axis. A screw element that ensures improved torque transmission with the best possible compatibility with known force applications is realized by the second surfaces (13) each having a first arcuate sub-surface (13a) and a second arcuate sub-surface (13b).

Screw (1) for mounting plate-shaped building materials whose bulk density is at least 1,000 kg / m3, comprising: a screw shank (2) having an external thread (3), a plate-shaped screw head (4) which forms a bearing surface (6) on an inner side (5) facing the screw shank (2) and is orthogonal to the screw shank (2), and at least one tool projection (7) on an outer side (8) of the screw head (4) facing away from the screw shank (2), characterized in that the screw (1) has a coating, at least in the area of ​​the screw head (2), which improves the adhesion of plastically workable, subsequently hardening coating materials.

The utility model relates to turning and grinding composite equipment for machining an outer circle and an annular groove of a steel piston, and belongs to the technical field of piston machining equipment. The equipment comprises a base, a stand column, a left planker, a right planker, a left workbench, a right workbench, a tool turret, a static pressure electric spindle and a rotating spindle, the stand column is arranged on one side of the base, and the left planker and the right planker are horizontally arranged on the two sides of the stand column respectively through servo lead screw systems; the left carriage and the right carriage are vertically provided with a left workbench and a right workbench through servo lead screw systems respectively, the left workbench is provided with a tool turret, the tool turret is provided with a machining tool, the right workbench is provided with a static pressure electric spindle, the lower end of the static pressure electric spindle is provided with a grinding wheel, and the other side of the base is provided with a rotating spindle. Piston outer circle machining is completed through turning, turning is replaced by grinding when a piston ring groove is machined, the machining precision of the piston ring groove is improved, the service life of the piston ring groove is prolonged, the structure is compact, operation is convenient, and machining efficiency is high.

This invention discloses a posterior spinal fixation structure, comprising an arc-shaped main body, a pair of adjustable transverse connecting arms, and a pair of elastic micro-motion joints. The arc-shaped main body covers the defect area formed after laminectomy, and its surface is provided with a biomimetic trabecular porous tantalum layer and a gradient drug-loaded structure on the inner surface, with an expandable sealing ring at the edge. The pair of adjustable transverse connecting arms are located on both sides of the arc-shaped main body, and their length is adjustable. The ends are provided with universal connectors for connecting rods of a spinal internal fixation system. This invention achieves compatible fixation with a rod-and-screw system through adjustable connecting arms, provides physiological cushioning through elastic micro-motion joints, achieves bio-anchoring and programmed drug release through the porous tantalum layer and gradient drug-loaded structure, and achieves dynamic closure through expandable sealing rings. It effectively solves the problems of unstable fixation, limited functionality, and lack of individualized adaptation in existing technologies, significantly improving the stability and functionality of the implant.

The invention relates to a screw system (100) for the automated screwing in of a screw element, comprising: - a screwdriver (110); - a drive unit (120) for the rotary drive of the screwdriver (110); - a coupling device (130) arranged along a rotational axis (D) between the drive device (120) and the screwing tool (110), comprising a drive shaft (133) and a rotatably connected output shaft (134) arranged along the rotational axis (D) and movable relative to each other in the axial direction. According to the invention, the coupling device (130) has a pneumatic suspension with constant spring force acting in the axial direction between the drive shaft (133) and the output shaft (134), so that the contact force (F) applied to the screwing element by the screwing tool (110) remains constant during a screwing operation. The invention further relates to a method for operating the screw system (100).

The invention includes an automated coffee capsule pressing mechanism designed to perform the necessary pressing to extract coffee from a sealed capsule. The design features a lead screw system driven by a motor that applies downward pressure to the coffee capsule for efficient extraction. This design allows for precise control of the applied pressure, thus ensuring consistent coffee brewing. The invention comprises a set of components, including the base frame, electric motor, screw and nut assembly, and capsule holder, all of which work together to provide a smooth and automated pressing process.

This invention provides a special bolt for use in a drilling modulus tester calibration device, comprising a screw system and a ball bearing system. The screw system includes a nut, a screw rod, and a bolt. One end of the screw rod is fixedly fitted with the nut, perpendicular to the screw rod. The screw rod has a smooth surface on the side near the nut and an external thread matching the nut on the side away from the nut. The nut has the ball bearing system perpendicular to the nut on the side away from the screw rod. This special bolt is used in applications requiring axial restraint and radial free sliding. When used in the calibration device of a drilling jack radial loading tester, it ensures that only radial free movement occurs in the inspection fixture holding the modulus measuring probe, thus giving the dial gauge reading mounted on top of the inspection fixture practical calibration significance.