298results about How to "Guaranteed rotation accuracy" patented technology

The invention discloses a hydraulic steering system for a front lifting crane. The hydraulic steering system is provided with a front shaft, a rear shaft and a steering device which is used for controlling the steering loop of a driving steering shaft, wherein both the front shaft and the rear shaft are both steering shafts, either the front shaft or the rear shaft serves as the driving steering shaft, and the other one serves as a driven steering shaft. The steering system further comprises a hydraulic valve and a controller, wherein the hydraulic valve is used for controlling the steering loop of the driven steering shaft, and the controller is used for outputting a control signal to the hydraulic valve according to a steering mode determined by user instructions, so as to adjust the flowing direction and flow rate of the steering loop of the driven steering shaft. Compared with the prior art, the steering system for the front lifting crane, disclosed by the invention, has the advantage that the requirements on two aspects, namely the performance of the steering system and the service lives of wheels, can be met effectively. Based on the steering system, the invention further provides the front lifting crane using the steering system.

The invention discloses an impacting-sliding composite frictional wear testing device and a method thereof. The method comprises the following steps that a spherical upper test piece is clamped on an upper clamp and a planar lower test piece is clamped by using a lower clamp; the lower clamp is controlled to move up and down by a precise screw lifting platform so that the upper test piece and the lower test piece come into contact; a servo motor drives the upper test piece to do up-down reciprocating motion at set frequency f, times N and displacement S by an eccentric disc, an upper knuckle bearing, a lower knuckle bearing, an impacting shaft, a spring leaf and an upper clamp, and carries out reciprocating impact on the lower test piece; in the impacting process, the spring leaf is deformed under the action of stress, so that impacting-sliding composite frictional wear between the upper test piece and the lower test piece is realized; and simultaneously, the force borne by the lower test piece is tested by a three-dimensional dynamic piezoelectric sensor connected with the lower clamp and is transmitted to a data acquisition control system, and a friction coefficient-cycle time curve is obtained by analysis. The impacting-sliding composite frictional wear testing device and the method disclosed by the invention have the advantages that the material can conveniently generate rigidity-adjustable impacting-sliding composite frictional wear, the automation degree is high and the repeatability of experimental data is good.

The invention discloses an automatic product GAP and STEP detection production line and a detection process. The automatic product GAP and STEP detection production line comprises a stander, a material belt which is arranged at the outer side of the stander, and a non-defective product material belt and a defective product material belt which are arranged at the rear end of the stander in parallel, wherein the defective product material belt is disposed at the inner side of the non-defective product material belt. The automatic product GAP and STEP detection production line also comprises a fixture, a positioning mechanism of the fixture, a loading mechanism, a rotating plate, a rotating and clamping mechanism, a product GAP detection mechanism, a first product STEP detection mechanism, a second product STEP detection mechanism and an unloading mechanism, and successively completes the steps of loading by the rotating plate, code scanning at the front end, GAP detection, first STEP detection, second STEP detection, unloading by the rotating plate, code scanning at the rear end and unloading. The GAP detection and the STEP detection are integrated to automatically complete the loading, unloading, workstation switching and 360-degree overall detection of products, so that the automation degree and the detection precision are high.

The invention relates to the field of automobile part machining, in particular to an automatic grinding machine for an automobile shifting fork. The automatic grinding machine comprises a base and further comprises a feeding station, a first grinding station, a second grinding station, a discharging station and a rotating workbench; the rotating workbench comprises a fixture installing table, thefixture installing table is horizontally arranged on an index plate and provided with four workpiece fixtures used for containing and clamping workpieces, and the feeding station, the first grinding station, the second grinding station and the discharging station are clockwise and sequentially arranged along the periphery of the fixture installing table and correspond to the workpiece fixtures arranged on the fixture installing table one to one in a working state; the feeding station comprises a feeding mechanical arm used for putting the workpieces on the workpiece fixtures; the first grinding station comprises a first grinding mechanism used for grinding the workpieces; the second grinding station comprises a second grinding mechanism used for grinding the workpieces; and the dischargingstation comprises a discharging mechanical arm. Therefore, the problems that the human cost input is high, and the yield is low are solved.

The present invention provides a mobile power tool which is compact and has high reliability. This mobile power tool is provided with a motor 1, a driving transmission section 2 for transmitting the driving power of the motor 1 to the output section 3, a mounting rack for supporting the driving transmission section 2, a body housing 5 for covering the motor 1 and maintaining the mounting rack, and a tubular cover 4 for covering and rotatablely supporting the output section 3. Furthermore, by fitting the body housing 5 and the driving section cover 4 so that the internal space of the two can communicate in the mobile power tool, wherein the body housing 5 is provided with an advance or retreat engaging section of the driving section cover for constraining the advance or retreat movement of the driving section cover 4 by being engaged with the driving section cover 4, and a rotational engaging section of the diving section cover for constraining the rotational movement of the driving section cover 4 by being engaged with the driving section cover 4.

The invention relates to a conical air floating shaft system, which comprises an air floating main shaft, an air floating inner shaft sleeve, an air floating outer shaft sleeve, and positioning plates, wherein the air floating inner shaft sleeve is arranged on the outer side of the air floating main shaft, and is matched with the air floating main shaft, the air floating outer shaft sleeve is arranged on the outer side of the air floating inner shaft sleeve, and is matched with the air floating inner shaft sleeve, and the positioning plates are arranged on both ends of the air floating main shaft. The positioning plates are fixedly connected with the air floating main shaft. Both ends of the air floating outer shaft sleeve are provided with an anti-thrust plate. The anti-thrust plate is fixedly connected with the positioning plate. In the prior art, the positioning accuracy of the existing air floating shaft system is not high, and the dry friction is easily generated. With the present invention, the technical problems in the prior art are solved, and the conical air floating shaft system is provided, wherein the conical air floating shaft system integrates the advantages of the air floating main shaft, the air floating main shaft is matched with the air floating shaft sleeves so as to effectively improve the stiffness of the shaft system, the conical surface match is adopted so as to provide high centering accuracy, and it can be ensured that the air floating shaft system of the present invention has high accuracy when the off-axis end surface is high.

The invention provides a high-accuracy sleeve main shaft structure for a machine tool, which prevents a bearing from deflection during preloading, ensures the running accuracy of a main shaft, and further ensures the high accuracy of the sleeve main shaft. The high-accuracy sleeve main shaft structure for the machine tool comprises the main shaft and a sleeve, wherein the main shaft penetrates through the sleeve and is supported at the inner sleeve wall via a front-end bearing and a back-end bearing, the front end part of the main shaft is embedded and sleeved at the front end part of the sleeve, and a back end press cover is arranged at the back end part of the sleeve; and the high-accuracy sleeve main shaft structure for the machine tool is characterized in that the back end of the main shaft is sleeved with a back end oil press sleeve, the back end oil press sleeve is in interference fit with the back end of the main shaft, the inner end surface of the back end oil press sleeve is in close contact with the back-end bearing, the external circular surface at the outer end of the back end oil press sleeve is in close contact with the internal circular surface of the back end press cover, the front end of the main shaft is sleeved with a front end oil press sleeve, the front end oil press sleeve is in interference fit with the front end of the main shaft, and one end surface of the front end oil press sleeve is in close contact with the front-end bearing.

The invention relates to the technical field of rehabilitation medical instruments, in particular to a lower limb rehabilitation robot, which is provided with a bracket and a treadmill, and is characterized in that the bracket is provided with a parallel buffer mechanism and a leg tralvel assisting mechanism,the parallel buffer mechanism consists of four connecting rods and a back plate. The leg travel assisting mechanism is arranged on the front surface of the back plate; the leg travel assisting mechanism consists of a group of width adjusting components, two groups of leg travel assisting components and four groups of driving adjusting components; the width adjusting component consists of a support, an tooth-reversed screw rod, a sliding seat plate and a hand wheel; the leg travel assisting component consists of a transverse hip rod and a vertical swing rod; the driving adjusting component consists of a support plate, a servo motor, a belt, a driving wheel, a driven wheel, a sleeve,a sleeve rod, a ball screw rod and a mounting hinge head. The treadmill is arranged below the leg travel assisting mechanism to assist the patient in performing ankle rehabilitation training, and therobot has the advantages of simple structure, low cost, convenient use, high popularity, and convenient household use.

The invention discloses a laboratory measurement method for the optical properties of satellites, comprising the following steps: step 1, simulating the attitude motion of a satellite and establishing a satellite attitude motion model; step 2, establishing a light source model projected to a satellite model based on the satellite attitude motion model, and simulating the illumination of the sun to the satellite; and step 3, establishing a detector model simulating the detection angle of a detector based on the satellite attitude motion model and the light source model, wherein the direction of the detector in the detector model faces the satellite model in the satellite attitude motion model. Through equivalent treatment of the process of space optical observation, optical observation of a satellite is simulated in the laboratory; through satellite attitude control turntable scheme design, turntable rotation shafts clamping a target model are designed to simulate satellite attitude control; an around-center rotating part controlling the rotation of the detector is designed to simulate the relative motion of the optical detector; and a three-axis turntable and a detector are designed in a combined manner to simulate omni-directional observation based on a semicircular detection slide rail.

The invention discloses an off-line-type gas bag polishing tool finisher, and relates to a gas bag polishing device. The off-line-type gas bag polishing tool finisher is high in efficiency, low in cost, easy to operate and high in reliability. The off-line-type gas bag polishing tool finisher is provided with a swing motor, a planetary reducer, a swing main shaft box, a base, a swing shaft, a gas bag main shaft box, a swing arm, a driving wheel, a belt, a rotary connector, a rotary connector support, a driven wheel, a feeding motor, a protective cover, a gas bag main shaft, a gas bag tool, a lead screw support, a grinding wheel main shaft, a finishing grinding wheel, a grinding wheel main shaft box, a lead screw, a sliding block, a swing arm supporting base, a supporting bearing, a barb frame, a barb bearing, an arc guide rail, a guide rail, a gas bag driving motor and a grinding wheel driving motor. The off-line-type gas bag polishing tool finisher can effectively improve the working efficiency of a gas bag polishing machine and meanwhile has obvious effects in the aspects of improving the finishing efficiency of the gas bag tool, improving the reliability of the finishing process, reducing the cost and the size of finishing equipment and the like.

The invention provides a large-tonnage rotation movement hydraulic machine, and belongs to the technical field of hydraulic machines. The large-tonnage rotation movement hydraulic machine comprises a hydraulic machine frame, a hydraulic station, a pressure head mechanism and a workbench, wherein the hydraulic machine frame comprises an upper beam, a lower beam and stand columns. The hydraulic station is located on the top of the hydraulic machine frame. The pressure head mechanism is hoisted below the hydraulic station. The workbench comprises a movement workbench and a rotation workbench, wherein the rotation workbench is located on an inner cavity of the movement workbench. Four travelling jack-up cylinders are symmetrically arranged below the movement workbench, three rotation jack-up cylinders which are evenly distributed are arranged below the rotation workbench in the circumferential direction of the rotation workbench, rolling wheels are arranged at the bottoms of the travelling jack-up cylinders, and rolling bearings are arranged between the rotation jack-up cylinders and the rotation workbench. The large-tonnage rotation movement hydraulic machine can be used for forming and machining large-tonnage plates, and the machining accuracy of the large-tonnage rotation movement hydraulic machine can be effectively guaranteed.

The present invention provides an automatic feeder device for lathe. Said automatic feeder device is placed by workpiece holder of lathe, and includes the following several portions: material-supporting pipe placed on the machine frame, material-feeding cylinder placed at one side of said material-supporting pipe, slide plate fixedly connected on said material-feeding cylinder and can be axially moved along the material-supporting pipe and two material-feeding devices through which the rod material can be passed are placed on the machine frame. Said two material-feeding devices include one mobile material-feeding device and one fixed material-feeding device. Its operation is convenient, stable and reliable.

The invention discloses a dial external spline gear ring radial pulsation measuring apparatus, which comprises a measuring stand, an internal spline ring, an adjusting handle, an adjusting screw, a pressure spring and a measuring indicator, wherein the internal spline ring and the measuring indicator are arranged on the measuring stand respectively; the internal spline ring is formed by assembling three coaxial internal splines, namely a first spline, a second spline and a third spline; the first spline and the third spline are fixedly connected with each other and have completely corresponding tooth shape; the second spline is movably connected between the first spline and the third spline and can perform concentric rotation; the adjusting handle is inserted into the second spline and the third spline; and the adjusting screw and the pressure spring are arranged inside concave holes which are arranged inside the second spline and the third spline. The measuring apparatus has the advantages of convenient, accurate and direct measurement, easy maintenance, low requirement on a measuring environment, low cost, high efficiency and the like, and is particularly suitable for mass production field detection.

The invention relates to a big slewing ring bearing three guide post worm gear screw lifting vertical type coil winding machine, comprising a lifting system and a winding slewing system connected with the lifting system, wherein the lifting system comprises a lifting base, three or four worm gear screw lifters which are fixed on the lifting base and move on the lead screws, and a lifting driving device which drives the worm gear screw lifters to lift; the winding system comprises a slewing face plate connected with the lifting base by the big slewing ring bearing, a big gear fixed on the lower part of the slewing face plate, a small gear meshed with the big gear, a slewing reducer and a variable frequency main motor; the slewing reducer and the variable frequency main motor are directly connected with the small gear. The invention has the advantages of high efficiency, multifunction, stable running, high automatization control level, easy operation, fault-free, correct number of turns of the coiling and low manufacturing cost, etc.

The invention relates to an electrochemical polishing method for a bearing retainer. The electrochemical polishing method for the bearing retainer comprises the steps of: preparing, electrochemical polishing, electrolyte mixing, cleaning by using cold water, passivating, cleaning by using hot water, drying and rust preventing; the electrolyte is prepared from phosphoric acid, water and chromic anhydride in a volume ratio of 8:4:1; the temperature of the electrolyte is controlled to be below 40 DEG C; in the electrochemical polishing step, the current density is 35A/square decimeter, the working voltage is 8-10V, the distance between the negative pole of an electrochemical polishing machine and a processed workpiece is 5-10mm, and the electrochemical polishing time is 90s; the preparing step comprises the sub-steps of: preparing the electrolyte, adding the electrolyte in an electrolytic vessel, placing a lead plate in the electrolytic vessel, connecting the lead plate and the negative pole of the electrochemical polishing machine, and preparing the processed workpiece; and the step of preparing the processed workpiece comprises the following sub-steps of: performing oil removing and cleaning on the processed workpiece, cleaning by using hot water, cleaning by using cold water, hanging on a hanger, and connecting the processed workpiece with the positive pole of the electrochemical polishing machine. According to the electrochemical polishing method, the clamping as well as the material charging and discharging are convenient, the occupying area is small, the cost is low, the burr removing effect is good, the labor intensity is obviously reduced, and the time and the labor are saved.

An energy-storing type compensator of a stirrer belongs to the technical field of mechanical sealing and comprises a press sleeve, a bearing press cover, an end cover, an expansion joint assembly and a shaft sleeve, a bearing inner sleeve, a bearing, an oil storage sleeve internally provided with lubricating oil and a mechanical seal, wherein the shaft sleeve, the bearing inner sleeve, the bearing, the oil storage sleeve internally provided with lubricating oil and the mechanical seal are arranged in the expansion joint assembly. Two ends of the expansion joint assembly are respectively connected with the bearing press cover and the end cover, the shaft sleeve is arranged in the expansion joint assembly, the bearing inner sleeve and the oil storage sleeve are respectively sleeved at two ends of the shaft sleeve, the bearing is installed on the bearing inner sleeve, the mechanical seal is installed in a cavity defined by the bearing press cover, the expansion joint assembly, the bearing inner sleeve, the bearing and the oil storage sleeve, and the press sleeve is connected with the end portion of the bearing inner sleeve. When the energy-storing type compensator works, the shaft sleeve is installed on a driving shaft of the stirrer, and the end cover is fixed on a stirrer machine body. The compensator organically combines the mechanical seal and the expansion joint assembly, is compact in structure, convenient to disassemble and stable and reliable in use and resolves the problem of sealing of rotating shafts of such equipment, thereby being suitable for sealing of vertical rotating shafts with swinging and axial jumping.

The invention relates to a bidirectional pressure regulating pre-tensioner for an electric spindle angular contact ball bearing and belongs to the field of mechanical design and manufacturing. The bidirectional pressure regulating pre-tensioner comprises a pressure ring (a), a load-adding sheath (b), an elastic element (c) and a bidirectional force sensor (d), wherein the pressure ring is formed by a bearing outer ring supporting sleeve, a bearing sealing ring and a thrust ring; the load-adding sheath consists of a left-handed stud, a hexagonal sleeve and a right-handed stud; and the elastic element consists of both left and right fixed plates, two tension spring sleeves which are symmetrically distributed, two pull rods which are symmetrically distributed, four compression springs, two pressure rods which are symmetrically distributed, and two pressing sleeves which are symmetrically distributed. The bidirectional pressure regulating pre-tensioner realizes bidirectional quantitive constant-pressure pre-tensioning on a bearing pack, can ensure that an axial pre-tensioning force of the bearing pack is constant when the electric spindle bearing generates axial displacement, ensures rotating accuracy and rigidity of the electric spindle bearing in the high-speed rotating process, also can quantitively regulate the pre-tensioning force and avoids the phenomenon that the bearing is blocked and burnt down due to excessively high heat generation.

The invention discloses a device for precisely boring a lug hole of a hinge beam, which comprises a boring jig frame, a power device and a boring rod, wherein one end of the boring rod is connected with an output shaft of the power device through a universal joint coupler, the bottom of the boring jig frame is provided with a lifting rotating mechanism, a plurality of groups of boring rod supports are symmetrically arranged on the boring jig frame, positioning holes of each group of boring rod supports are positioned on the same axle line; the boring rod supports comprise bases, glands and bearing bodies, the bases and the glands are of a split structure, the bearing bodies are arranged in the boring rod supports; and a smaller gap between the boring rod and a sliding connecting sleeve ofthe bearing bodies is in the term of meeting the requirement of precision processing. The device has high processing precision, saves processing time and increases production efficiency by above 50 percent.

The invention relates to a rotary display panel detection device. The rotary display panel detection device comprises a rotating disc assembly and an optical-mechanical assembly. Four stations are arranged at positions corresponding to the four directions of the rotating disc assembly; the rotating disc assembly rotates; display panels on rotating disc jigs sequentially penetrate through the fourstations to complete operations on the corresponding stations; and an operator can complete feeding and discharging, erasing, camera photographing detection and burning re-judgment on one of the stations through a set of equipment, so that the production cycle of the display panels is greatly shortened. A cam divider and a four-index inductor are arranged at the bottom of a rotating disc to ensurethe rotating precision of the rotating disc. An outer cover is provided with a safety door lock, a safety grating, a man-machine interface, an operation window and the like, and doors and windows arearranged on the upper and lower peripheries to facilitate maintenance. The optical-mechanical assembly is composed of two sets of optical-mechanical modules, linkage servo modules are arranged, and an optical-mechanical part is provided with a quick-disassembling type darkroom, so that simple and quick up and down joint debugging on an optical machine is achieved.

The invention discloses a numerical control machine tool spindle box system with an embedded braking mechanism. The numerical control machine tool spindle box system comprises a box body and a spindleand further comprises a spindle brake, a bearing sealing system, a bearing pre-tightening clearance eliminating device and a bearing lubricating system. According to the spindle box system, during active braking, braking resistance is provided mainly through a braking protrusion embedded in a radial groove, the friction abrasion speed of an embedding ring in the braking process is small, and theservice life is long. The bearing sealing system of the spindle box system can have a dust and dirt preventing protection function on a bearing and can also have a temperature reducing and cooling function on the inner ring of the bearing and the spindle, the rigidity of the spindle and the inner ring of the bearing can be improved, and the spindle rotation precision is kept. The bearing pre-tightening clearance eliminating device can automatically eliminate clearances generated due to bearing abrasion, the rigidity of a first deep groove ball bearing and a second deep groove ball bearing is greatly improved, the rigidity of the spindle system can be greatly improved, and the spindle rotation precision and the machine tool machining precision are improved.