233 results about "Rotational stability" patented technology

The utility model discloses a wafer rotary drying device. The wafer rotary drying device comprises a rotary platform; the multiple clamping jaws are distributed in the circumferential direction of the rotating platform at intervals. The clamping jaws are connected to the rotating platform through rotating shafts correspondingly. The side, facing the wafer, of the clamping jaw is provided with a horizontal placement face used for horizontally supporting the back face of the wafer. The climbing surface is arranged on the peripheral side of the horizontal placement surface; the clamping surface is arranged on the peripheral side of the climbing surface and can be matched with the climbing surface to clamp the edge of the wafer; when the rotating platform rotates, the upper portions of the clamping jaws rotate inwards and downwards, the clamping face and the climbing face of each clamping jaw are matched, and the multiple clamping jaws clamp the wafer together. The utility model also discloses a wafer rotary drying method. According to the utility model, the cleaning and drying effects of the back of the wafer are improved; the rotating platform does not participate in clamping of the wafer, so that the number of consumables is remarkably reduced; relative sliding of the wafer and the clamping jaw is effectively avoided, and rotation stability is improved.

The utility model relates to a longitudinal active air-inlet grille, which comprises a grille frame and a plurality of arranged blades, each blade is provided with a connecting side and a movable side which are oppositely arranged along the length direction of the blade, the connecting side is rotatably connected onto the grille frame, and the movable side can rotate around a rotating shaft of the connecting side under the action of a driving component; a guide part which can be connected with the movable side and is used for guiding and limiting the movable side is arranged on the guide bracket; and the blades can have different opening angles under the action of the guide part. Compared with the prior art, the utility model has the beneficial effects that the guide bracket is arranged, and the angle of each blade in an open state is changed, so that the size of an air outlet and the air outlet quantity are changed, and air outlet diversity is formed; by means of the movement stability of the parallelogram, the opening or closing movement of the blade on the single side meets the change path of the parallelogram, and the rotation stability of the blade on the single side is guaranteed.

An improved orthopedic broach used to prepare an intramedullary canal of a patient's bone such as, for example, a patient's femur, to receive an orthopedic implant such as, for example, a hip stem implant. The broach has differential teeth or tooth patterns. In one preferred example, the broach includes three different types of teeth including diamond teeth, compaction teeth, and extraction teeth. The different teeth patterns being specifically arranged on the sides of the broach to optimize bone removal and bone compaction for a subsequently implanted hip stem implant. In addition, the different teeth patterns and locations enhancing rotational stability. As such, the broach is configured to compact bone in certain areas while removing bones in other areas, all while maintaining broach rotation.

The utility model relates to the technical field of wheel hub detection, in particular to a wheel hub fixing device for aluminum alloy wheel hub dynamic balance detection equipment, which comprises a dynamic balancing machine, a lifting mechanism, an output shaft, a limiting plate and a mounting component, the lifting mechanism is mounted at the bottom of one side of the dynamic balancing machine, the output shaft is arranged at the top of one side of the dynamic balancing machine, and the limiting plate is arranged on the output shaft. The limiting plate is installed on the outer side of the output shaft, the output shaft is sleeved with the installation assembly, and the installation assembly comprises a threaded pipe, a conical block, a lantern ring, a screw and a limiting insertion block. According to the hub fixing device for the aluminum alloy hub dynamic balance detection equipment, a hub is lifted to the position of the output shaft through the auxiliary lifting mechanism, the physical strength needed by workers for carrying is reduced, and the working efficiency is improved. And the hub limiting area is adjusted according to the size of the hub to be detected, so that the hub is fixed at a proper position on the output shaft, and the hub rotation stability is improved while the hub fixing effect is ensured.

A telescopic nail with rotational stability, where the female component is externally D-Shaped through a special burnishing process or a plastic deformation, and the male component nests in the form of the female. The male component is partially D-Shaped to lock the two components together for easy removal. The thread of the tapered head of the female component has multi-leads and is synched with the multi-lead thread of the proximal head on the male components. The number of leads and the length of the thread are adaptable to the child's bone anatomy in such ay there is no intrusion of the bone joint. The male and female are locked together as an assembled nail and inserted simultaneously in the bone intramedullary canal. In case of revision or hardware removal surgeries, the assembly nail components are removed simultaneously together.

The invention provides an impeller high-temperature over-rotation test device. The impeller high-temperature over-rotation test device comprises a long shaft, an impeller, a press-fitting assembly, a buffer assembly and a fixing piece. The long shaft comprises a first shaft body and a second shaft body which are concentric and different in diameter, the impeller is sleeved on the first shaft body, and press-fitting parts are formed at two ends. The first press-fitting assembly and the second press-fitting assembly are pressed on the press-fitting parts on the two sides of the impeller correspondingly, relative rotation is prevented through the rectangular keys, the double press-fitting assemblies are symmetrically arranged to balance axial force, and rotation stability is improved. The left / right clamping sleeve is matched with the conical surface of the left / right taper sleeve, and a tensioning wire groove is formed to adapt to impellers of different sizes and compensate size changes. The buffering assemblies are arranged in a mirror symmetry mode, the horn mouth design optimizes stress distribution, long-axis thermal expansion is absorbed, and vibration impact is resisted. The fixing piece provides axial fixing force, and the axial rigidity of the system is optimized. The device can ensure the reliable positioning of the impeller at high temperature and ultrahigh speed, and improves the test precision and reliability.

The invention provides a laser measuring instrument, and relates to the technical field of laser measuring instruments, the laser measuring instrument comprises a first worm and a second worm which are rotatably connected to a fixing frame in a limiting manner, a worm gear is mounted between the first worm and the second worm in a meshed manner, a follow-up rod is coaxially mounted on the worm gear, and the follow-up rod is coaxially mounted on the first worm and the second worm. The follow-up rod is rotatably connected to the follow-up frame in a limiting mode, the follow-up rod is coaxially and fixedly provided with the bearing disc, and the bearing disc is provided with a plurality of fixing holes. According to the laser measuring instrument, through a double-worm cooperative driving mechanism, accurate positioning and flexible adjustment of a workpiece in a three-dimensional space are achieved; the traditional measuring equipment generally adopts a single driving mode, so that the movement precision and the rotation stability are difficult to consider, and the device solves the technical problem through the cooperation of a first worm and a second worm.

The invention relates to the technical field of numerical control lathes, and discloses a rotary positioning machining device of a numerical control lathe, which comprises a lathe body, a positioning part mounted in the lathe body and used for positioning machining positions of workpieces with different sizes, and a clamping part mounted on the positioning part and used for clamping different rotating speed correction axial forces of the workpieces. The compensation part is installed on the positioning part, the first motor is adopted to drive the threaded rod to drive the sliding block and the case to move, and compared with the problem that a traditional threaded lead screw is prone to fatigue due to long-term stress, precision is reduced, and jamming is caused, the compensation part is driven by the linear motor to work after the first motor is shut down; the compensation rod and the balls enter the circulating groove of the three-jaw chuck to form triangular limiting, the balls roll in the circulating groove, abrasion of cutting force to the three-jaw chuck and the output shaft of the second motor is effectively overcome, the clamping stability and the rotating stability of the three-jaw chuck under long-term operation are guaranteed, deviation and shaking are avoided, and therefore the positioning precision is improved.

The invention discloses a workpiece visual inspection equipment control system, and relates to the technical field of visual inspection, the workpiece visual inspection equipment control system comprises a main body mechanism, the main body mechanism comprises a workbench, and the top of the workbench is provided with a turnover mechanism. A workpiece is fixed twice through a first clamping plate and a second clamping plate, the number of times of fixing the workpiece again is reduced, the comprehensiveness of workpiece detection is further improved, repeated positioning errors are avoided, meanwhile, the clamping direction can be automatically switched through rotation of a gear, the detection efficiency and flexibility are remarkably improved, and through the arrangement of a lifting unit, the detection precision is improved. Temporary support is provided in the workpiece reversing process, the workpiece is lifted before fixing to ensure full attachment to the rotating block, a contact gap is eliminated to improve the rotating stability, the workpiece retracts in time after being clamped to avoid interference to multi-axis movement, and the workpiece is lifted again before reversing to prevent the workpiece from being separated from the rotating block due to gravity.

The present invention discloses an actuator and a robot, wherein the actuator comprises a housing, a driving motor, and a first-stage planetary reducer; the driving motor comprises a stator, a rotor, and a rotor bracket; the first-stage planetary reducer comprises a first-stage inner gear ring, a first-stage sun gear, a first-stage planetary gear, and a first-stage planetary bracket; the first-stage inner gear ring is fixedly matched with the housing and fixedly connected to the inner edge surface of the stator, and the first-stage sun gear is synchronously connected to the rotor bracket; the inner gear ring is provided with a first supporting surface extending axially, and the rotor bracket is provided with a second supporting surface extending axially and located inside the first supporting surface, and an installation space is formed between the first supporting surface and the second supporting surface, and a main bearing is embedded in the installation space, and the outer ring and the inner ring of the main bearing are fixedly connected to the first supporting surface and the second supporting surface respectively. The present invention enables the rotor to have better rotation stability and improves the precision of the actuator.

The shaftless solid-liquid centrifugal pump comprises a plurality of mixed conveying units which are sequentially connected in series, each mixed conveying unit comprises a pump shell, a front guide vane, an impeller and a rear guide vane, the front guide vane, the impeller and the rear guide vane are arranged in the pump shell, the front guide vane, the impeller and the rear guide vane are coaxially and sequentially arranged in the conveying direction of the mixed conveying units, and the impeller comprises a shaft sleeve section and an outlet section which are communicated. A radial blade grid is arranged in the outlet section, the front guide vane is provided with a sleeve structure, a variable-pitch axial blade grid is arranged in the front guide vane, the front guide vane is arranged in the shaft sleeve section in a sleeved mode, the front end of the front guide vane is located outside the shaft sleeve section, and the rear end of a flow channel of the front guide vane is communicated with the inlet section of the impeller. The front guide vane of each mixed conveying unit is connected with the rear guide vane of the previous mixed conveying unit, the rear section of the pump shell is provided with a flow channel hub, and the rear guide vanes are variable wrap angle spiral blades and are fixed to the surface of the hub. The problems that particles of a solid-liquid mixed conveying system are prone to blockage in a flow channel and high in abradability are solved, and the rotation stability of the impeller is improved.

The utility model discloses a power tool holder for inner hole processing, specifically relates to the technical field of power tool holders, including a base, a transmission shaft passing through one side of the top of the base, a through slot on the other side of the top of the base, a processing assembly for processing inner holes arranged in the through slot, a rotating rod fixedly arranged at the bottom of the transmission shaft and the bottom of the processing assembly, the two rotating rods are connected by a connecting assembly, the connecting assembly includes two first pulleys, and the two first pulleys are respectively fixed on the two rotating rods. The utility model drives two threaded rods meshed by two bevel gears to rotate simultaneously by a motor, so as to adjust the position of the first pulley under the fixture and adjust the cutter head on the fixture, without manual adjustment, and is more convenient to use. At the same time, the belt is tightened by the second pulley to avoid the loose belt from affecting the rotation stability of the first pulley, thereby improving the stability of the cutter head when processing the inner hole.

The present invention relates to the technical field of bearings, a combined bearing, comprising an upper bearing and a lower bearing, wherein the upper bearing comprises an upper bearing outer ring and an upper bearing inner ring; one end of the upper bearing inner ring is an inner ring member, and the lower bearing comprises a lower bearing outer ring and a lower bearing inner ring; the other end of the upper bearing inner ring is a shaft member, which passes through the lower bearing inner ring and is locked on the lower bearing inner ring by a locking sleeve; the upper bearing outer ring and the lower bearing outer ring are closely matched. The combined bearing with an encoder also comprises an encoder assembly, which comprises a code disc, a photoelectric assembly and a sensing assembly, wherein the code disc is mounted on the inner ring of the upper bearing, the sensing assembly is mounted on the inner bottom surface of the lower bearing outer ring, the photoelectric assembly comprises a light source and irradiates the code disc, and the photoelectric assembly is connected to the sensing assembly circuit. According to the technical solution of the present invention, the combined bearing is integrated, the installation links are reduced, the inherent accuracy of the bearing is ensured, and the rotation stability is effectively improved. At the same time, the assembly and disassembly are convenient, which is conducive to maintenance, and the integrated structure saves space and has a beautiful appearance.

The invention relates to a gas vane thrust vectoring device servo driving scheme of a plug nozzle engine, which is specifically divided into a gas vane, a fixing device of the gas vane and an integrated electro-hydraulic servo control system, so that the gas vane is fixed on the surface of a plug cone, and the gas vane can be controlled to act at a specified angle according to requirements. In order to enable the gas vanes to generate large axial force and to have small axial loss at the same time, the gas vanes are evenly arranged at the 50% length position of the plug cone in the circumferential direction. In order to solve the problems of feasibility and reliability of axial fastening of the gas rudder shaft on the curved surface of the plug cone, a split type design and dual-bearing fastening are used. In order to guarantee the transmission rotation stability and accuracy of the gas vane, a servo motor is used for driving a hydraulic cylinder, and a double-rocker mechanism is formed to achieve driving. In order to ensure the flexibility and reliability of the thrust vector of the engine, a unit integrated electro-hydraulic servo system is adopted, so that each gas vane can independently realize vector control. The invention has the advantages of high structural reliability, high control accuracy and high vector maneuverability.

The present invention relates to the field of composite pipe production equipment and discloses a winding machine, comprising: a fixed frame (1); a slewing bearing (2), the slewing bearing comprising an inner ring (21), an outer ring (22) and a rolling element (23), wherein the inner ring (21) is fixed to one side of the fixed frame (1), the outer ring (22) is connected to a driving device and is coaxially rotatably mounted on the outer periphery of the inner ring (21) through the rolling element (23); and a rotating bracket (3), the rotating bracket (3) being mounted with a belt reel (4) and fixedly connected to the outer ring (22) at one end so as to enable the reinforcing belt (5) on the belt reel (4) to be wound onto a core pipe (6) passing through the rotating bracket (3) and extending along the rotation axis of the slewing bearing (2) when the rotating bracket (3) is driven by the driving device to rotate along with the outer ring (22). The winding machine provided by the present invention has high rotational stability, thereby facilitating the improvement of the winding quality of the composite pipe.

A method for measuring a relative movement between bones and a method for acquiring a joint rotation axis of bones are provided, which can effectively improve rotational stability of a prosthesis of knee arthroplasty, thereby improving surgical outcomes. A population average bone joint most stable axis (a-MSA) is acquired through the method, so that the design of a joint prosthesis can be improved and a reference of a population average position can be provided for intraoperative placement of a prosthesis. An individual bone joint MSA (i-MSA) of a patient is acquired through the method before surgery, so that individual position information can be provided for intraoperative placement of a prosthesis, thereby further improving rotational stability of a surgical prosthesis.

The utility model discloses an electric bolt fastening device for a limited space. The device is mainly composed of a device shell, a rotating wheel, a transmission disc and an electric wrench. The electric wrench is connected with the rotating wheel through a unique worm and worm wheel transmission system, axial power is converted into circumferential rotating power, 90-degree steering transmission is achieved, and the electric wrench is suitable for operation scenes which are narrow in space and inconvenient to operate. The device shell and the rotating wheel adopt a limiting structure of a clamping ring groove and an annular clamping rail, so that the rotating stability is ensured; the driving disc is installed at the bottom of the rotating wheel through a magnetic attraction structure, and driving discs with bayonets of different specifications can be rapidly replaced to adapt to various bolt sizes. In actual use, only an electric wrench needs to be connected with the device in an inserted mode, the corresponding transmission disc is selected, and bolt fastening operation can be efficiently completed in the limited space. The device is compact in structure and convenient to operate, the operation efficiency and safety are remarkably improved, and the technical blank in the field of bolt electric fastening in the limited space is filled.

The utility model discloses an output shaft transmission mechanism with high concentricity rotation, which comprises a motor, a motor shaft, a shaft coupler, an output shaft and an output shaft bearing, two ends of the shaft coupler are respectively in transmission connection with the motor shaft and the output shaft, the shaft coupler comprises two layers of planetary gear trains, and the two planetary gear trains are overlapped and share one gear ring; a sun gear of the first-layer planetary gear train is connected with a motor shaft, an output shaft body is fixedly connected with a planet carrier of the second-layer planetary gear train, and the first shaft end of the output shaft extends into a shaft cavity of a sun gear of the second-layer planetary gear train. Through the connection relation of the output shaft and the planetary gear train, the swing control of the output shaft is added to the first shaft end by utilizing the characteristic of central operation of the sun gear, so that the higher concentricity level of the output shaft during rotation is ensured, the swing phenomenon of the rotating shaft is overcome, the precision control of ground particles is facilitated, a blade is not damaged, and the working efficiency is improved. And the rotating stability of the knife sharpening assembly is improved.

The utility model belongs to the technical field of electric hoist conveying devices, and particularly relates to a spraying line electric hoist conveying device which comprises a top plate, the lower end of the top plate is fixedly connected with two symmetrically-distributed guide rails, the outer side of each guide rail is sleeved with a guide sleeve in a sliding mode, and a transfer box is fixedly connected between the two guide sleeves. A mounting seat is fixedly connected to the middle of the lower end of the top plate, a servo motor is fixedly mounted on the vertical portion of the left side of the mounting seat, and an output shaft of the servo motor is rotationally connected with the mounting seat. Through the arrangement of the servo motor, the winding wheel, the pull wire and other structures, a transfer box of a spraying line can be transferred for use, under the rotating ring groove, the limiting rod and other structures, the winding wheel can be rotationally guided, the deflection problem of the winding wheel is avoided, and the rotating stability of the winding wheel is guaranteed.

The directional oil cylinder comprises a cylinder barrel and a piston rod, a limiting column with a non-circular section is installed in the cylinder barrel along the axis, an inner hole is formed in the piston rod along the axis, and the piston rod is in sliding fit with the limiting column through the inner hole so as to limit rotation of the piston rod. The directional oil cylinder is provided with a non-circular limiting column along the axis, a piston rod is in sliding fit with the limiting column through an inner hole formed along the axis, rotation of the piston rod can be limited, and vertical circulating directional movement of the oil cylinder is achieved; when the piston rod of the oil cylinder is connected with the rotating part to form a working mechanism, vertical working and rotating working can be achieved at the same time, interference on rotation of the rotating part is avoided, and the requirement for rotating stability is more easily met. The overall structure is simple and the manufacturing cost is low.

The utility model discloses a traction sheave installation structure convenient to overhaul, which comprises a fixed seat and a traction sheave body, a rotating rod is arranged on the right side of the fixed seat, the traction sheave body is sleeved on the rotating rod, and a limiting component is arranged on the side wall of the left end of the traction sheave body. According to the traction wheel, the traction wheel body is in butt joint with the rotating rod, the fixing block is inserted into the annular limiting groove, and the ball is in sliding abutting contact with the annular limiting groove, so that the traction wheel body is effectively limited, and the rotating stability of the traction wheel body is improved; an annular inserting block is inserted into an annular inserting groove, a rectangular protrusion is inserted into a rectangular clamping groove, after a cylindrical threaded protrusion penetrates through a circular hole, a circular limiting base is positioned on a rotating rod, and a nut is in threaded connection with the cylindrical threaded protrusion in a sleeving mode and then matched with a sealing cover for protection sealing; a large number of bolts are not needed for fixing, and dismounting, replacing and overhauling are convenient.

Bone transplant made of a cortical bone substance having a screw shank and a screw head for introducing a screwing-in torque. Both the screw shank and the screw head are provided with an external thread, in which at least the external thread of the screw shank is a multi-start thread. Due to the design, on the one hand a certain stroke can be achieved with fewer revolutions or in a shorter time, whereby the screwing-in behavior is improved and the tendon tissue is protected. On the other hand, the use of multiple threads provides a high surface area for the tendon tissue to grow on the tendon anchor, which improves fixation of the tendon and increases rotational stability. The bone transplant according to the invention thus ensures good fixation of the tendon and can be implanted quickly.

The invention discloses an encoder, a joint module and a robot, and the encoder comprises a housing which is provided with a mounting cavity; the first code disc supporting piece is arranged in the mounting cavity; the device shell is connected with the first coded disc supporting piece through the first bearing; the second code disc supporting piece is arranged in the mounting cavity; the first code disc supporting piece and the second code disc supporting piece are connected through the second bearing; and the second coded disc supporting piece is connected with the device shell through the third bearing. According to the encoder, the plurality of bearings are arranged in the encoder, so that the friction force among all parts can be effectively reduced, dust is difficult to influence the rotation of the first code disc supporting piece and the second code disc supporting piece, the rotation stability of the code discs on the first code disc supporting piece and the second code disc supporting piece is improved, and the stable operation of the encoder is ensured.

The utility model relates to a connecting device of a perforator, in particular to a crossover coupling assembly of an oil and gas well perforating device, which is used for solving the technical problems of insufficient stability, sealing performance and centering performance of the crossover coupling assembly of the existing oil and gas well perforating device. The adapter assembly of the oil and gas well perforating device comprises the middle connector, the middle core passing piece and the switch pressing cap, the electric through function is achieved through the middle core passing piece, the sealing performance under the high-pressure environment is ensured through a sealing ring groove in the middle connector, and rotation stability is provided through a bearing in a bearing ring groove; according to the utility model, the electrical transmission performance and the overall reliability of the oil-gas well perforating device are effectively improved, and the stable operation of the system under complex working conditions is ensured.

The invention relates to a developing box which is detachably mounted in imaging equipment provided with a driving force output part, and the developing box comprises a developing shell, a developing roller, a powder feeding roller, a driving force receiving part, a first transmission part, a second transmission part and a third transmission part, the driving force receiving part is used for receiving the driving force output by the driving force output part, and the first transmission part is driven by the driving force receiving part; a second transfer section mounted at a longitudinal end of the developing roller; the third transmission part is mounted at the longitudinal tail end of the powder feeding roller; a first intermediate transmission part, both the third transmission part and the first intermediate transmission part receive the driving force from the first transmission part, and the second transmission part receives the driving force from the first transmission part through the first intermediate transmission part; the first middle transmission part and the third transmission part are arranged to rotate relative to each other; the scheme can improve the rotation stability of the developing roller.

This invention discloses a connection structure for a statorless disc generator coil, including a coil flange located at the center of the coil and a speed increaser flange located at the output end of the speed increaser. At least two sector-shaped bosses are evenly distributed around the center of the speed increaser flange on the end face of the speed increaser flange. Sector-shaped grooves matching the shape, position, number, and size of the sector-shaped bosses are provided on the mating end face of the coil flange. All sector-shaped bosses are embedded in the sector-shaped grooves to form radial and tangential constraints. At least two anti-shear pin holes are also paired on the speed increaser flange and the coil flange, and anti-shear pins are fitted into the anti-shear pin holes. This solution can effectively transmit torque, reduce bolt shear force, ensure high-speed rotational stability, and enhance impact resistance.

The utility model belongs to the technical field of constructional engineering, and particularly relates to a premixed concrete conveying hopper device which comprises a base, a first support, a second support, a speed reducer, a hydraulic motor, a stirring tank, a guide wheel, an eccentric monitoring mechanism and a material guiding mechanism, and the first support and the second support are fixedly connected to the left end and the right end of the upper surface of the base respectively. The speed reducer is fixedly connected to the top of the first bracket; the hydraulic motor is mounted at the left end of the speed reducer; the stirring tank is mounted on an output shaft of the speed reducer; the two guide wheels are installed at the front end and the rear end of the top of the second support respectively, the stirring tank is supported through the guide wheels, the stirring tank is locked on the second support through the binding band, and the stirring tank is prevented from falling off. According to the concrete mixing tank, the rotation stability of the mixing tank can be monitored, the mixing tank is prevented from falling off due to excessive swing, the concrete conveying safety is improved, the concrete discharging direction can be adjusted, and accurate concrete discharging is achieved.

This invention discloses a method for controlling the rotation of a cavity during two-color injection molding, relating to the field of precision injection molding technology. The method includes: collecting interface temperature, pressure, and micro-deformation data to construct an interface load-bearing capacity evaluation; completing a curing assessment and obtaining the interface load-bearing capacity evaluation; adjusting the floating support structure and wedge mechanism to form a decoupled floating state based on the interface load-bearing capacity evaluation; predicting the rotational stability window and generating a target rotation trajectory based on the interface load-bearing capacity evaluation; driving the turntable to rotate and recording interface micro-deformation to generate an interface deformation field; confirming the integrity of the mold cavity by centering the positioning pin and positioning cone after rotation; converting the interface deformation field into regionalized deformation weights to implement secondary injection molding compensation and obtaining a compensation effect evaluation; constructing a comprehensive performance evaluation based on the compensation effect evaluation and updating process parameters. This invention achieves interface offset correction and improved regional deformation uniformity through secondary injection molding compensation based on regionalized deformation weights generated from the interface deformation field.