32results about How to "Guaranteed displacement accuracy" patented technology

The invention discloses a device for measuring friction force and film thickness of a lubricating oil film under different surface speeds, and the device comprises an experiment bench which is provided with a translation platform, and the translation platform can move linearly under the drive of a drive device. A main shaft system is arranged on the experiment bench, a glass disc is arranged on the main shaft system, and the glass disc can rotate. An arc-shaped guide rail is arranged on the translation platform. The rotating base is installed on the arc-shaped guide rail and can move along thearc-shaped guide rail, the loading system is installed on the rotating base, a steel ball of the loading system and the glass disc move relatively, and a rotating bearing in the rotating base converts friction force generated by relative movement into pressure which can be collected by a pressure sensor on the rotating base.

The invention relates to a shape-correcting device special for an aerial irregularly shaped extruding structure component. The shape-correcting device is composed of two parts, i.e., a hardware system and a software system, wherein the hardware system mainly comprises a roller system, a main driving system, a screw rod feeding system and a frame; the software system is divided into two parts; one part takes a displacement sensor as a main part for controlling the feeding precision; the other part takes a force sensor as a main part for optimizing the correcting according to a correcting experience. Compared with the prior art, the shape-correcting device has the advantages that the bending-torsion compound correcting is adopted, and the correcting precision is high; the digital correcting is adopted, so that the efficiency is high; parts in different sizes are corrected, and the flexibility is high.

The invention discloses an adjustable pressure distortion simulator and a transmission device of the adjustable pressure distortion simulator. The transmission device is used for moving distortion simulation inserting plate assemblies and comprises a stepping motor, a first bevel gear, a second bevel gear, a worm assembly, a lead screw, a lead screw nut and a guiding rod, the first bevel gear is driven by the stepping motor, the second bevel gear is matched with the first bevel gear, the worm assembly and the second bevel gear are connected and synchronously move, the lead screw is transmitted by the worm assembly through a worm wheel, the lead screw nut is matched to the lead screw, the guiding rod is parallel to the lead screw, the guiding rod is connected with the distortion simulation inserting plate assemblies through a linear bearing movably arranged on the guiding rod in a sleeved mode, and the lead screw nut drives the linear bearing and the distortion simulation inserting plate assemblies to move up and down when the lead screw rotates. The transmission device is reliable in structure, small in space size, high in displacement accuracy and high in use reliability.

The invention discloses an automatic splined hub machining equipment with the function of integrally forming a tooth profile, and relates to the technical field of automobile part production. The equipment specifically comprises a conveying belt, a quantitative conveying mechanism, an inner hole end face axial linkage clamp, a movable clamping mechanism and a tooth profile forming composite die, wherein the quantitative conveying mechanism is arranged at the top end of the conveying belt, and the movable clamping mechanism is arranged on one side of the top end of the conveying belt. Accordingto the automatic splined hub machining equipment with the function of integrally forming the tooth profile, the tooth profile forming composite die is arranged, so that the problems that in the background art, the efficiency is low and the production cost is high due to common sequential single-tooth machining of existing splined hub material outer tooth spline machining equipment are perfectly solved; due to the design of the die, integral forming and final shaping of tooth bottoms, tooth tops and tooth sides of outer teeth of a splined hub are achieved, it is guaranteed that the dimensionalprecision of a workpiece meets the requirement after extrusion forming through uniform distribution of rolling components and release frames located in inner cavities of two layers of annular supports, and the applicability is higher.

The invention discloses a lift car gravity center tester which is simple in structure, convenient to operate and capable of rapidly capturing a lift car gravity center. The lift car gravity center tester comprises a lift car installation seat (1), an upper support (2) and a lower support (3), the lift car installation seat (1) is fixedly arranged at a central position of the upper support (2), an X shaft double-wheel bearing device (4) doing free motion along an X shaft and a Y shaft double-wheel bearing device (5) doing free motion along a Y shaft are arranged between the upper support (2) and the lower support (3), the upper support (2) is in floating connection with the lower support (3) through the X shaft double-wheel bearing device (4) and the Y shaft double-wheel bearing device (5), a pressure sensor (6) is arranged on both the X shaft double-wheel bearing device (4) and the Y shaft double-wheel bearing device (5), and the pressure sensors (6) are electrically connected with a peripheral control platform. The lift car gravity center tester can be used in the field of elevator lift cars.

The invention discloses a closed-loop AF automatic focusing lens driving device comprising a frame, two clamping slots, balls, a moving unit and a driving feedback unit; the moving unit comprises a lens supporting body, a driving magnet, and a feedback magnet; the driving feedback unit comprises a Hall element, a drive coil, and a circuit board; two clamping slots are formed between the lens supporting body and the frame; the two clamping slots are located at diagonal positions; the two clamping slots are loaded with balls therein; the circuit board has an integral forming structure and can be mounted on the frame through a slot-embedded structure. The beneficial effects of the driving device are: the device has simple structure, easy assembling, small moving frictional force, high displacement precision, and stable product quality.

The invention relates to a CT scanning bed lifting control system, a CT scanning bed and a control method. The system comprises a control unit, a push rod driving motor set, a speed measurement sensorset and a height sensor, wherein the push rod driving motor set, the speed measurement sensor set and the height sensor are connected to the control unit. The push rod driving motor set comprises a first push rod driving motor connected to a first push rod and a second push rod driving motor connected to a second push rod, the speed measurement sensor set comprises a first speed measurement sensor connected to a rotating shaft of the first push rod driving motor and a second speed measurement sensor connected to a rotating shaft of the second push rod driving motor, and the height sensor is used for acquiring actual height data of a bed body. Compared with the prior art, the control precision is high, the reliability is high, and the safety is high.

The invention discloses a control method for a multi-axis synchronous movement with a high speed and a high precision based on a double clock, and the final purpose is to output a pulse sequence and direction signals to a servo drive of each shaft. The method comprises steps of: determining an output time and a direction of a pulse through the calculation; determining a size clock period accordingto the maximum movement speed of each shaft and the input pulse range; converting the time and direction signals into pulse direction numbers, and storing the pulse direction data in a data file in the form of a two-dimensional array; reading and analyzing the pulse direction number of the two-dimensional array format in the data file by a numerical control device; uninterruptedly converting thepulse direction numbers of the two-dimensional array format into pulse and direction signals, by the switch and the timer, and the large-cycle clock is used as the synchronization signal; and inputting the signals to the servo drive, so that the trajectory movement is completed. According to the control method for the multi-axis synchronous movement with the high speed and the high precision basedon the double clock, the method realizes the control of the multi-axis synchronous movement with the high speed and the high precision through the calculation and hardware synchronous output method;improves the processing efficiency by the high speed; and improves the processing quality of the product with the high precision.

The invention discloses a pressing type travel switch resisting severe environment. The pressing type travel switch is composed of a shell, a drive body assembly, a base assembly and a pressing spring. The base assembly comprises a base body and at least one set of contact bars. The drive body assembly comprises a drive body, a button and at least one drum-like contact spring part. The number of the drum-like contact spring parts is the same as that of the sets of the contact bars. A locating boss on the base body and a locating blind hole in the drive body are located on the same axis. The upper end of the pressing spring is fixedly embedded into the locating blind hole. The lower end of the pressing spring is fixedly embedded outside the locating boss. The shell is a housing with a penetration hole formed in the center of the top. According to the travel switch, the drum-like bundling type contact springs with multiple elastic contacts are adopted, multi-point elastic surrounding uniform contact with the contact bars can be achieved, and the travel switch has the advantages of being high in impact resistance, high in vibration resistance, miniaturized, high in reliability, low in cost and the like.

The embodiment of the invention provides a motion parameter processing method, device and system and a storage medium. The method includes the steps that a motion parameter sequence of a target jointis obtained; whether direction changing parameter sets exist in the motion parameter sequence or not is detected; each direction changing parameter set includes motion parameters making the motion direction of a motion part changed, wherein three time data of the motion parameters are adjacent; and if at least one direction changing parameter set is detected, at least one direction changing motionparameter is inserted in each of at least one direction changing parameter set so as to obtain a new motion parameter sequence, and at least one direction changing motion parameter is used for indicating the return clearance generated when the motion part completes direction changing in preset time. The direction changing motion parameter is inserted in the motion parameters making the motion direction of the motion part changed so that the return clearance can be compensated for, the displacement accuracy of the motion part can be better ensured, and it can be better ensured that a robot reaches the set position with the set speed within set time.

The invention discloses an EtherCAT bus-based control system for a three-axis parallel mechanical arm. The control system comprises a PC linux master station, a human-computer interaction interface, an EtherCAT controller I, an EtherCAT controller II, an input module, a storage module, a generation module, a motion controller module, a three-axis parallel mechanical arm motion module and a visualdetection system module; the PC linux master station comprises an Ethernet card; the Ethernet card is connected with the EtherCAT controller II and the human-computer interaction interface; the EtherCAT controller II is connected with the three-axis parallel mechanical arm motion module through the motion controller module; the man-machine interaction interface is connected with the input module and the EtherCAT controller I; and the EtherCAT controller I is connected with the motion controller module through the generation module. With the control system adopted, the real-time performance andstability of the control of the three-axis mechanical arm can be effectively guaranteed. The control system has the advantages of low cost and good expansibility.

The invention discloses a horizontal loading asphalt mixture stability tester and a test method thereof. One end of the horizontal loading device extends into the constant-temperature water bath, the force value sensor is located on the horizontal loading device, the driving device is connected with the horizontal loading device and drives the horizontal loading device to move left and right, and a displacement sensor is arranged between the driving device and the horizontal loading device. A signal feedback end of the displacement sensor, a signal feedback end of the force value sensor and a signal opening and closing end of the driving device are respectively connected with the control unit, and a test piece to be tested is clamped on the horizontal loading device and is positioned in the constant-temperature water bath. Through the force value and displacement sensors, the stress state is displayed in real time through the display, a force value and displacement curve is formed, the condition of the test piece in the stress process can be effectively identified, and the strength attenuation state of the asphalt mixture can be represented.