12results 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.

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 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.

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 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 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.

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.

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.