28results about How to "Eliminate backlash" patented technology

The utility model discloses an automatic lifting cutting device, which relates to the technical field of optical fiber cutting and particularly comprises an electric lifting execution structure, a tool bit fixing structure and a guide reset structure. The tool bit fixing structure comprises a tool bit bearing platform, a baffle connected with the tool bit bearing platform, a tool bit fixing shaft movably connected with the middle of the top end of the tool bit bearing platform and a displacement sensor connected with one side of the top end of the tool bit bearing platform. The electric lifting executing mechanism comprises a motor mounting plate, an ejector rod movably connected with the motor mounting plate, a second servo motor connected with the motor mounting plate and a ball screw movably connected with the motor mounting plate, and the ejector rod is located below the baffle. According to the automatic lifting cutting device, real-time dynamic adjustment of working coordinates of the tool bit is achieved through the digital control system, intelligent matching of cutting parameters is achieved, and the adaptability and cutting precision of the device to optical fibers of different specifications are improved.

The present invention provides a rotation angle measuring device and a multi-angle driving vehicle, wherein the rotation angle measuring device comprises: a frame, comprising a rotatable central shaft; a gear assembly mechanism, comprising: two second gears and two third gears, the two second gears are coaxially arranged and respectively mesh with the first gear at two different points, each second gear is respectively connected to a third gear in transmission, the two third gears are sleeved on the central shaft and rotate synchronously with the central shaft, and a tensioning member is arranged between the two third gears, and the tension of the tensioning member on each third gear has a component force in the rotation direction of the third gear; an angle measuring instrument, used to measure the rotation angle of the central shaft. The present invention can eliminate the tooth gap between the first gear and the second gear, and between the second gear and the third gear by arranging the tensioning member between the two third gears, and the rotation angle of the gear measured is of high accuracy.

The invention relates to a multi-redundancy high-precision coaxial rudder angle feedback device, which comprises a feedback mechanism, a mounting seat and a control system, and is characterized in that the feedback mechanism is mounted on the mounting seat and is provided with a plurality of groups of feedback signal modules to realize cold and hot backup of feedback signals; during hot backup, a plurality of rudder angle feedback signals are simultaneously sent to a control system, and after an arbitration algorithm, an optimal feedback signal is output and participates in rudder angle closed-loop operation, so that the reliability of the feedback signals is improved, and the steering safety is effectively guaranteed. According to the method, a feedback signal hot backup mode is adopted, fault feedback signals can be automatically eliminated under a software algorithm, and the reliability of the feedback signals is improved. A standby feedback signal adopts a cold backup mode, so that a hot backup feedback module can be replaced in time when the service life of the hot backup feedback module is about to reach, and the safety of ship course control is ensured.

The invention relates to a precise machining system for a bridge steel tower. The precise machining system is characterized by comprising a lathe bed, a stand column, a sliding table and a lifting platform; the lathe bed and the stand column are made of iron castings subjected to multiple heat treatment procedures, the structure is stable, a spindle is driven by an alternating-current servo motor to rotate, high-speed and low-speed output is achieved through electrical speed change, and a light cutting face milling cutter disc which is good in rigidity and high in strength and is used for heavy-load rough machining is selected. The feeding transmission of each shaft adopts an advanced double-motor double-speed reducer gear driving mode, and a servo motor is provided with a brake to eliminate the backlash of a gear and a rack in the driving process, so that the gapless transmission is realized; protection structures are arranged on the machine body and the stand column, and meanwhile, a transmission gear, a rack and a lead screw of the machine tool are clean; the lifting platform is adopted as a centralized operation area, so that the part machining condition is convenient to operate and observe.

This utility model discloses a connection structure for mechanically clamped cutting tools, relating to the field of machining technology. It includes: a fixed base plate for mounting and fixing to a CNC machine tool; a connecting plate disposed on one side of the fixed base plate and maintaining a movable connection; tool mounting seats disposed on the top and bottom of the connecting plate, with transmission boxes disposed on the sides of the two tool mounting seats that are close to each other; a clamping plate disposed inside the tool mounting seats for clamping and fixing the mechanically clamped tool, achieving a fixed connection between the mechanically clamped tool and the CNC machine tool; and a directional pushing mechanism disposed inside the transmission boxes for pushing the clamping plate to move in a directional direction, achieving a fixed adjustment of the mechanically clamped tool. This utility model forms a highly compact overall structure through a rotary dual-station layout and a mechanical locking mechanism, not only saving the disassembly and reassembly time required for traditional tool changes, but also achieving dual-station functionality within a limited volume, significantly improving equipment space utilization and system rigidity.

The present application relates to diesel engine technical field, specifically to a kind of big power transmission's noise reduction timing gear train for diesel engine, including idler gear component and transition gap elimination gear component, the two sides of the idler gear component are engaged with fuel pump driving gear and camshaft driving gear respectively, when there is tooth side gap between crankshaft timing gear, hydraulic pump driving gear and transition gap elimination gear component, the maximum gear knock sound occurs, rear end gap elimination gear pair, gap elimination master gear and crankshaft timing gear form a pair of gear pair, and the tooth side gap between this pair of gear pair is eliminated by rear end gap elimination gear pair;Front end gap elimination gear pair, gap elimination master gear and hydraulic pump driving gear form a pair of gear pair, and the tooth side gap between this pair of gear pair is eliminated by front end gap elimination gear pair, realize double gear pair elastic pre-tightening gap elimination structure, and each component works cooperatively by three mechanisms of axial positioning, elastic pre-tightening and limit locking, complete gapless transmission.

The utility model discloses a kind of high-precision semiconductor device special equipment positioning adjusting device, it is related to semiconductor manufacturing and testing field, solve the problem of traditional device adsorption uneven, low positioning accuracy and angle adjustment deficiency.The device includes rack, positioning table, drive mechanism, sliding assembly and other units.Positioning table adopts honeycomb vacuum adsorption groove, adsorption through-hole diameter 0.2mm, cooperate diamond positioning column and silicon carbide wear-resistant ball head, realize submicron adsorption and positioning accuracy.Drive mechanism is composed of piezoelectric push rod, flexible hinge and grating displacement sensor, realize X, Y high-precision displacement control;Angle fine adjustment assembly is cooperated by eccentric adjusting cam, arc-shaped guide slide rail and silicon nitride ceramic steel ball, realize 0.001 ° level angle adjustment.Scheme integrates high-precision adsorption, displacement closed-loop control and angle fine adjustment, significantly improve the precision and reliability of semiconductor device processing and testing, prolong equipment service life.

The invention relates to the technical field of wave plate processing, in particular to a material bearing device adaptive to wave plates of multiple sizes and specifications, which comprises a rack assembly, a driving assembly, a driven assembly, a material rod assembly and a material bearing disc, the driving assembly is arranged on the rack assembly and can drive the driven assembly to rotate. The driven assembly is arranged on the rack assembly and connected with the material rod assembly. Wave plates can be placed on the material bearing disc, limiting grooves are formed in the material bearing disc, and the limiting grooves are evenly distributed along the center of the material bearing disc. The material rod assembly can penetrate through the limiting groove and is driven by the driven assembly to move in the limiting groove, the material rod assembly can limit the wave plate, the whole device is composed of the machine frame, the driving assembly, the driven assembly, the material rod and other modular assemblies, the connection relation between the parts is clear, the gear system can be driven through the rotary knob, the cam set is driven to conduct synchronous adjustment, and operation is visual, easy and convenient. Due to the simple and efficient design, the manufacturing, assembling and subsequent maintenance cost of the equipment is reduced, and good practicability and economical efficiency are embodied.

This application discloses a composite structure phase-determining cycloidal oilless crossed roller guide, belonging to the technical field of crossed roller guides. It mainly includes a rotating ring, a sealing ring, a first positioning ring, and a second positioning ring. A V-shaped track groove is formed in the middle of the rotating ring facing the first and second positioning rings. A pin mounting cavity is formed on the rotating ring away from the V-shaped track groove, and pin teeth are distributed along the circumferential direction within the pin mounting cavity. This application achieves coaxial integration of drive and guide through the rotating ring, first positioning ring, second positioning ring, rotating ring, roller, pin mounting cavity, pin, pin shaft drive, and V-shaped track groove, eliminating assembly eccentricity and backlash. The phase-determining cycloidal structure achieves zero cumulative error and high repeatability accuracy. The combination of self-lubricating metal and engineering plastic enables completely oil-free operation and eliminates the need for lubrication maintenance. The composite pin tooth structure of the pin shaft and pin reduces friction, noise, and heat generation, improving durability.

This utility model relates to the field of fixing device technology, and in particular to an impact-resistant rotor shaft fixing device for a railway switch machine motor. It includes a motor body and a reducer. The main shaft of the motor body is fixedly connected to an axial rotating rod assembly via a coupling. A buffer protection assembly is installed on the outside of the axial rotating rod assembly. A shock-absorbing protection assembly is fixedly connected to the outside of the buffer protection assembly. A connecting frame assembly is fixedly connected to the rear end of the buffer protection assembly. The connecting frame assembly is fixed to the main shaft of the reducer via a clutch. The buffer protection assembly includes an arc-shaped shell, with a center plate fixedly connected to the inner side of the arc-shaped shell. A connecting groove is opened on the inner side of the center plate, and a first spring is fixedly connected to the outer side of the center plate. In this utility model, after the train departs, the device can eliminate transmission chain idleness and lag, ensuring micron-level accuracy of the switch rail opening and tightness gap, eliminating the need for repeated gauge calibration, and significantly improving adjustment efficiency and the reliability of the railway signaling system.

The utility model discloses an encoder installing and connecting device, which comprises a driving disc and a transmission mechanism, the driving disc is connected with a tested part, the transmission mechanism comprises two driving rods and a driven rod, the two driving rods are respectively arranged on one side of the driving disc far away from the tested part through a sliding adjusting mechanism, one end of the driven rod is arranged between the two driving rods, and the other end of the driven rod is arranged on the driven rod. According to the utility model, the problem that the measurement precision cannot be ensured when the encoder is connected by adopting an existing transmission rod in a non-coaxial manner is solved.

The utility model provides a driving device and processing equipment, the driving device comprises a mounting bracket, a lifting bracket and a driving structure, the lifting bracket is movably connected with the mounting bracket, and the lifting bracket is used for mounting a processing head; the driving structure is arranged on the mounting support and connected with the lifting support, and the driving structure is used for driving the lifting support to move. According to the technical scheme, the precision of the driving device in the moving process can be improved, and the automation degree of machining equipment is improved.

A working turntable locking structure of a shoulder injection machine comprises a machine table, a turntable is arranged on the machine table, shoulder injection core rods are evenly distributed on the outer ring of the turntable, shoulder injection stations are installed on the periphery of the turntable, the bottom of the turntable is connected with a working shaft, the working shaft is driven by a motor below, and a circle of locking positioning holes are evenly distributed in the working shaft. A mounting support is arranged on the side face of the working shaft, a front supporting plate and a rear supporting plate are connected to the mounting support, a guide column is arranged between the front supporting plate and the rear supporting plate, a sliding block is mounted on the guide column, a positioning pin is connected to the surface of the sliding block, and a spring is arranged between the back face of the sliding block and the rear supporting plate. The elastic force of the spring enables the positioning pin to be clamped into the locking positioning hole, an air cylinder is installed on the installation support, a push rod is installed at the piston end of the air cylinder, a protruding block is arranged on the sliding block, and the push rod pushes the protruding block towards the direction of the rear supporting plate. According to the utility model, the positioning pin is clamped into the locking positioning hole, so that the shoulder injection core rod on the turntable is ensured to accurately stay below each station.

A novel machining process for a heavy-duty, high-precision reducer with low tooth difference is disclosed. The process includes: an eccentric shaft and two eccentric wheels integrally formed, with the eccentric phase of the two eccentric wheels being 180°; two separate internal gears, with backlash eliminated by adjusting the installation phase angle of the two internal gears; the teeth of the external and internal gears are double-circular-arc tooth profiles, with the pressure angle α of the double-circular-arc tooth profile ranging from 10° to 25°, the eccentric wheel deformation coefficient b ranging from 0.3 to 0.7, and the tooth addendum coefficient a ranging from 0.1 to 0.5; the bearing holes, pin shaft inner holes, and tooth portions of the two external gears are integrally machined. This machining process uses two separate internal gears, eliminates backlash by adjusting the installation phase angle, and simultaneously controls the pressure angle, eccentric wheel deformation coefficient, tooth addendum coefficient, and tooth dedendum coefficient to create internal and external gears with double-circular-arc tooth profiles. This results in a reducer with a large number of meshing teeth and a large meshing surface.

The utility model discloses a driving device, multimedia equipment with the driving device and a vehicle with the driving device. The rotating shaft is sleeved with the matching shaft sleeve so as to drive the rotating shaft to rotate; and the driving gear is arranged on the rotating shaft in a sleeving mode, and the driving gear is matched with the inclined face of the matched shaft sleeve so as to be suitable for positioning the driving gear in the axial direction and the radial direction. According to the driving device provided by the embodiment of the utility model, the position of the driving gear is limited from the axial direction and the radial direction of the rotating shaft, so that the meshing clearance between the driving gear and other gears is convenient to eliminate, the transmission stability of the driving gear and other gears is convenient to improve, and the noise or abnormal sound generated in the transmission process is reduced.

The invention relates to the technical field of equipment control, and discloses an automatic feeding and discharging system for a blood cell image analyzer, comprising: a scanning module for scanning a bar code of a glass slide, decoding to obtain a shunting offset and a Y-axis target position of an objective table, and calculating a comprehensive position error of the glass slide; the channel switching module is used for updating the Y-axis target position according to the shunting offset and driving the linear guide rail sliding block to perform channel switching when the glass slide is away from the shunting node by a preset distance, synchronously starting the vacuum pump to extract air from the adsorption cavity to obtain a measured negative pressure value, and adjusting the air extraction rate according to the target negative pressure value and the measured negative pressure value to form stable adsorption force; and the transmission module is used for setting a target speed according to the comprehensive position error, calculating a motor driving current according to the target speed and an actual speed, and transmitting the glass slide to the objective table. The precision and efficiency of automatic feeding and discharging of the glass slides of the blood cell image analyzer are improved.

The utility model provides a rotary joint and a surgical robot, the surgical robot comprises the rotary joint, and the rotary joint comprises a driving part used for outputting rotary motion; the driving wheel is connected with the output end of the driving part; the output wheel is in meshing transmission with the driving wheel; the driven wheel is in meshing transmission with the output wheel; the damping structure is connected with the driven wheel and used for providing preset rotation resistance for the driven wheel; the first brake is used for braking the driving wheel; the second brake is used for braking the driven wheel. When the driving part drives the driving wheel to rotate, due to the fact that the damping structure has the preset rotation resistance to the driven wheel, the tooth surface of the driven wheel is attached to the tooth surface of the output wheel all the time, and therefore the back clearance between gear transmission can be eliminated, the transmission precision is improved, and the surgical risk is reduced. The driving wheel and the driven wheel are braked through the first brake and the second brake respectively, the tooth faces on the two sides of the output wheel can be effectively braked, the braking effectiveness of the output wheel is improved, and shaking in the braking process is avoided.

The utility model provides a built-in compression spring type concentric rotation mechanism, including drive shaft sleeve and the cam assembly that is located its outside, the compression spring is provided in the inside of cam assembly, the outer sleeve of cam assembly is provided with the center gear ring, the both sides of center gear ring are respectively meshed with large gear plate and pinion plate. Through built-in compression spring in the inside of cam assembly, and utilize the tension provided by this compression spring directly acts on center gear ring through cam assembly, effectively eliminated the meshing gap between center gear ring and bilateral large, small gear plate.

The utility model belongs to the field of biological medicine container equipment manufacturing, and discloses a flange structure which comprises a flange base, the flange base is provided with an upper surface, a lower surface opposite to the upper surface and a through hole penetrating through the upper surface and the lower surface, and the lower surface is detachably and fixedly connected with an external connecting surface. The upper surface is detachably and fixedly connected with a flange pressing plate, and the flange pressing plate is provided with at least two flange holes used for installing external configuration. The problem that the reserved gap between the two sterile flanges installed on the liquid storage tank end socket is insufficient is solved.

The present application belongs to the technical field of coal mine, especially a directional drilling machine near drilling measurement and intelligent analysis device for coal mine, and the following scheme is proposed: a plane plate, a plurality of threaded pipes are fixedly arranged at the bottom of the plane plate; a movable cover is fixedly penetrated in the middle of the plane plate; an adjusting plate is movably arranged above the plane plate; an analysis device is detachably arranged at the top of the adjusting plate; a touch screen is embedded at the top of the analysis device; a supporting mechanism is arranged on the plane plate; the supporting mechanism comprises: a plurality of fixed blocks fixedly arranged at the top of the plane plate. The present application is provided with a plurality of threaded pipes, each threaded pipe is internally screwed with a threaded rod with external threads, the bottom end of the threaded rod is integrated with a cross-shaped fixing frame and a conical supporting block, forming an independent adjustable floor supporting leg, the conical supporting block can be directly inserted into the soft coal and rock floor, forming an anchoring effect, preventing the whole machine from slipping, and having the advantages of stable support.

The present application provides a high-precision leveling device, a leveling platform, and a leveling method, which belong to the field of high-precision leveling technology. In view of the problem of how to reduce the control difficulty and operating cost of the active leveling mechanism when the leveling device has a high-precision leveling function, the present application provides a high-precision leveling device, including a drive assembly and a transmission assembly. Based on the ball screw and the rigid support, the rotation stroke of the ball screw can be converted into a displacement on the height of the support surface of the rigid support. Through the stretching assembly, the return clearance between the rigid support and the ball screw is eliminated to ensure the support stability after the rigid support is in place; and multiple displacement detection devices are used to achieve precise monitoring of the displacement of the rigid support; thereby, by adopting a mechanical transmission type active leveling solution, the stability and reliability after leveling are guaranteed, and at the same time, various measures are taken to eliminate errors in the mechanical transmission process to ensure the adjustment accuracy of the leveling device.

The invention provides an angle measurement system which comprises a final-stage gear, a driving unit, a clockwise rotation double-piece gear set, an anticlockwise rotation double-piece gear set, a solid shaft, a hollow shaft, a first encoder, a second encoder and a shell, and the final-stage gear is used for being connected with a load; the driving unit is connected with the last-stage gear to drive the last-stage gear to rotate; the clockwise rotation double-piece gear set is installed at one end of the solid shaft. The end, away from the clockwise rotation double-piece gear set, of the solid shaft is located in the hollow shaft and rotationally assembled together with the hollow shaft. The reverse rotation double-piece gear set is coaxially arranged on one side of the forward rotation double-piece gear set. The end, away from the reversing double-piece gear set, of the hollow shaft is located in the shell and rotationally assembled together with the shell. The first encoder is arranged in the shell and is connected with the solid shaft; and the second encoder is arranged in the shell and is connected with the hollow shaft. The problem of high-precision measurement during forward and reverse rotation can be effectively solved. And error compensation can be carried out on the angle, and high-precision angle measurement is completed.

This invention, within the field of wind turbine technology, discloses a control method for inertial backlash elimination in wind turbine nacelles and a yaw system. The yaw motor circuit is divided into two independently controlled power supply branches: a first drive branch and a second drive branch. After yaw wind alignment, the shutdown sequence of the two yaw motors is precisely controlled to achieve staggered shutdown, utilizing mechanical inertia to eliminate gear meshing backlash. This invention calculates the power-off delay time Δt of the two drive branches based on nacelle inertia, gear backlash, and motor characteristics. According to the direction of the unit's previous yaw action, the electromagnetic brake engagement time is coordinated with the power-off sequence of the two drive branches of the yaw motor to achieve rapid locking after the unit reaches the "backlash elimination" state. This invention, through time-sharing shutdown and inertial backlash elimination, fundamentally improves the stress state at the end of the yaw system, solving problems such as uneven load distribution and uneven force distribution between the drive teeth and bearing teeth.

The utility model discloses a kind of car central control rotary screen structure, including mounting substrate and central control screen, the elliptic arc opening is opened in the mounting substrate, and vertical fixed with guide rod, slidingly cooperate with slider on guide rod, the elliptic arc opening is engaged with gear, gear and connecting rod one end are hinged, connecting rod other end and slider are hinged, central control screen back and connecting rod are connected.The utility model can realize the rotation function of car central control screen, and can effectively avoid the interference problem caused by tangential movement in screen rotation process.

A worm and gear heavy-load compact automatic anti-backlash mechanism is applied to the technical field of precision mechanical transmission. The worm gear and the worm are mounted in the box body, the bearing is connected with a driving end at one end of the worm, the other end of the worm is provided with a sliding bearing seat, the sliding bearing seat and a bearing component in the sliding bearing seat are axially fixed with the worm, and an anti-backlash spring group is arranged on one side, far away from the worm gear, of the sliding bearing seat; a limiting nut of the anti-backlash spring group is in threaded connection with the box body and is arranged in the concave spherical surface direction of the box body and the sliding bearing seat; a connecting flange connected to the box body is in threaded connection with the jacking screw rod; the small end of the mandrel penetrates through the spring and is sleeved in an inner hole of the outer spherical pad; two ends of the spring are pressed between the positioning blind hole of the outer spherical pad and the positioning shaft shoulder of the large end of the mandrel; the convex spherical surface of the outer spherical pad is matched and contacted with the concave spherical surface of the jacking screw rod; and the convex spherical surface of the large end of the mandrel is matched and contacted with the concave spherical surface of the sliding bearing seat. The device is high in integration level, high in bearing capacity, easy to use, low in cost and capable of achieving automatic clearance elimination of the tooth surface of the worm gear and the worm.

This utility model discloses a backlash elimination mechanism for a fork rotary gear transmission, relating to the field of cargo handling technology. The device includes a bridge frame and a drive motor, a driven motor, and a gear shaft mounted thereon. A drive gear is connected to the output end of the drive motor, and a driven gear is connected to the output end of the driven motor. Both the drive gear and the driven gear mesh with the gear shaft. By controlling the drive motor to output a driving torque that rotates the drive gear, and simultaneously controlling the driven motor to output a reverse damping torque that causes the driven gear to abut against the gear shaft, the bidirectional force completely eliminates the backlash between the drive gear, the driven gear, and the gear shaft. This solves the fork wobbling problem caused by backlash in traditional single-motor gear transmissions, significantly improves the fork rotation positioning accuracy, simplifies the overall structure of the mechanism, and reduces manufacturing and maintenance costs.

The invention relates to an irradiation treatment system for local modification of a semiconductor, and belongs to the technical field of semiconductor processing. The irradiation treatment system for local modification of the semiconductor comprises a bearing table, a shielding mechanism, a positioning detection assembly and a control module, wherein the bearing table is used for bearing and fixing a semiconductor wafer; the shielding mechanism comprises a shielding plate and a driving assembly, and a radiation opening is formed in the shielding plate; the surface, facing the radioactive source, of the wafer is a processing surface; the edge position of the shielding plate is fixed, and the driving assembly is connected with the center point of the shielding plate and drives the center point to ascend and descend in the axial direction, so that the shielding plate generates elastic deformation to form an arc-shaped surface; the positioning detection assembly is used for detecting contact between the shielding plate and the machining face. The control module controls the center point of the shielding plate to ascend and descend according to the contact signal, so that the arc-shaped face shape of the shielding plate is matched with the arc-shaped shape of the machining face. According to the irradiation treatment system for semiconductor local modification, the reliability and the yield of a semiconductor local modification process can be improved.

The utility model discloses a kind of gravure printing machine plate roller axial fine adjustment devices, it is related to printing maintenance equipment technical field, to solve the problem of the mechanical positioning component long-time use is easy to wear in the process of using traditional axial fine adjustment device, further lead to the axial clearance of plate roller, affect printing precision, including plate roller assembly, adjusting assembly and compensation assembly;The plate roller assembly includes base, the vertical plate of being set at the top of base both sides, the rotating shaft of being set between vertical plate, the plate roller main body of being set at the surface of rotating shaft;The adjusting assembly is set at the side of vertical plate;The compensation assembly includes the hydraulic oil cylinder of being set at the top of base both sides, the floating joint of being set at the output end of hydraulic oil cylinder top, the thrust bearing of being set at the top of floating joint and being connected at the surface of rotating shaft. The utility model passes through design compensation assembly, effectively avoid the pattern misregistration, color overlapping problem caused by wear gap, guarantee the consistency of printed matter overprint precision.