119results about How to "Avoid backlash" patented technology

The invention discloses a numerical control precision micro-fine super-long deep hole drilling machine which comprises a workbench, a master control cabinet, a linear motor and a servo motor. An output shaft of the servo motor is provided with a drilling bit. The linear motor comprises a primary part installed on the master control cabinet and a secondary part where the servo motor is installed. The secondary part drives the servo motor to move so as to enable the drilling bit to stretch out or retract back above the workbench. The workbench comprises a lifting base and a workbench top arranged on the lifting base. A clamp for fixing a workpiece is installed on the workbench top. According to the numerical control precision micro-fine super-long deep hole drilling machine, the linear motor is used as a feeding power source of the drilling bit, intermediate transmission links such as a gear, a worm gear pair, a belt, a lead screw pair, a coupler and a clutch which are needed in an existing transmission chain from a motor used as a power source to a working component are abandoned, and rotational inertia, elastic deformation, a backlash, motion hysteresis, friction, vibration, noise and abrasion of the intermediate transmission links are avoided; the numerical control precision micro-fine super-long deep hole drilling machine is high in degree of automation, easy to operate, high in control precision, stable in motion, low in noise, long in service life, safe and reliable.

The invention relates to a rotating triple-prism beam scanning device comprising a rotating double-prism system, a rotating single-prism system, a guide rail, an adjustable support, and a fixed support. The rotating single-prism system comprises a base component, a prism and frame assembly, and a worm-and-gear mechanism. The prism and frame assembly comprises a flat washer, a wedge prism, a rubber pad, a wedge retainer ring, a threaded retainer ring, and a frame. The base component comprises a base, a base baffle, and a base insert. The worm-and-gear mechanism comprises a rotary motor, a motor stand, a coupling, a worm, a bearing support, a rolling bearing, a worm gear, an encoder support, and a rotary encoder. The rotating double-prism system is formed by assembling two rotating single-prism systems together. In the invention, the three wedge prisms are driven by the worm-and-gear mechanisms to do full-circumferential rotation, transmission is stable and accurate, and the scanning precision and stability of dynamic beams can be ensured; the prisms are independent of one another in rotation control, and diversified scanning modes can be achieved; and by introducing the third prism to the double-prism system, the scanning field of beams is enlarged significantly, and the problem that a double-prism system has scanning blind areas and control singular points is solved effectively.

The invention discloses an injection-molded part forming method requiring two stages of core pulling. During mold splitting, a core pulling oil cylinder drives a primary core pulling sliding block slidingly connected with the interior of a secondary core pulling sliding block to slide backwards, and the primary core pulling sliding block then drives a core pulling spindle slidingly connected with the primary core pulling sliding block to move backwards, so that primary core pulling is completed; the core pulling oil cylinder continues to act to pull the secondary core pulling sliding block to move backwards through the primary core pulling sliding block, so that secondary core pulling is completed; then, a product is ejected out of a movable mold; the core pulling oil cylinder acts backwards to allow the primary core pulling sliding block to move forwards, then to drive the core pulling spindle to move forwards and to stretch out of the forming end of the secondary core pulling sliding block; the core pulling oil cylinder continues to act to drive the secondary core pulling sliding block and the core pulling spindle to synchronously move forwards to reset, by this time, injection molding of a next product can begin. With the adoption method, a mould structure can be simplified, lateral core pulling in two any directions on one side of a product can be adapted, and backward movement of the core pulling spindle and the sliding blocks can be avoided.

A camera crane has a telescopically extendible arm with a camera platform supported at the front end of the arm. A mechanical leveling system is linked to the camera platform to keep the camera platform in a substantially horizontal or level position, regardless of the elevation angle of the arm. A counter weight moves along the arm as the arm extends and retracts, to help keep the arm balanced. A stabilizing system provides instantaneous corrective movements to the camera platform, to keep the camera platform level. The stabilizing system includes a sensor for sensing the angular position of the camera platform. An electronic controller provides a positive preload to a first motor, and a negative preload to the second motor, driving the camera platform, to avoid backlash. Upon sensing an out of level position, the controller provides a corrective signal to the motors, causing both motors to drive the camera platform back towards level.

The invention relates to a main jacking device for pipe jacking construction through a pipe-roofing underground excavation method. The main jacking device comprises a base, a fixed back part connectedwith the base, a propelling assembly movably and slidably arranged on the base, power mechanisms fixedly arranged on the propelling assembly, a portal frame fixedly arranged on the base and located in front of the propelling assembly, and stopping mechanisms mounted on the portal frame and capable of conducting extending-retracting adjustment. The power mechanisms are connected with the fixed back part, and the propelling assembly is pushed through the power mechanisms to move forwards along the base; and sawtoothed faces matched with pipe sections are arranged on the stopping mechanisms, andthe sawtoothed faces are closely attached to the outer side faces of the pipe sections through extending-retracting adjustment of the stopping mechanisms. The phenomenon that the jacked pipe sectionsrecede when the pipe sections are additionally arranged during pipe jacking construction through the pipe-roofing underground excavation method can be well avoided, downward-inclining of the whole pipe sections due to sinking of a machine head in the propelling process can slow down, and stable propelling of the pipe sections can be ensured, and the construction efficiency is high.

The present invention provides a vehicle drive device which can generate a desired yawing moment when left and right reverse torque control is carried out and control first and second motors to be at any target rotating speed simultaneously. A back-wheel drive device is equipped with a left-wheel drive unit possessing a first motor and a first planetary gear reducer arranged on the transmission paths of the first motor and a left back-wheel; a right-wheel drive unit possessing a second motor and a second planetary gear reducer arranged on the transmission paths of the second motor and a right back-wheel; and a control unit. The first motor is connected with a sun gear of the first planetary gear reducer, and the second motor is connected with a sun gear of the second planetary gear reducer; the left back-wheel is connected on a planetary gear carrier of the first planetary gear reducer, the right back-wheel is connected on a planetary gear carrier of the second planetary gear reducer, and inner gears are connected with each other.

A fixation structure for a rear cover (1) in which a waterproofing grommet (5) is fixed to the wire lead-out side (4), from which a wire from a connector housing (2) is led out, of a connector (3) and which is assembled to the wire lead-out side (4) of the connector for (3) with the waterproofing grommet (5) in between. The grommet (5) is provided with a rib (7) that is in contact with the inner wall (protrusion (34)) (6) to hold the attitude of the grommet (5) relative to the rear cover (1).

The invention relates to a linear motor module for robot splicing. The linear motor module comprises a rotor assembly, a stator assembly, a brake and a controller, wherein the brake is connected to the rotor assembly, the rotor assembly sleeves the stator assembly, connection holes are formed in both of the rotor assembly and the stator assembly, the rotor assembly comprises a shell, a coil, a connector, a grating reading head, a first limit switch and a second limit switch, the stator assembly comprises a stator body, a permanent magnet and a grating, the brake comprises a wedge-shaped block,a braking spring, a piston, a braking block and an extrusion spring, and the grating reading head, the first limit switch, the second limit switch and the piston all are electrically connected with the controller.

The invention provides an M-type bag forming clamping device. The M-type bag forming clamping device solves the problems of complex and large structure, low matching degree and low packaging efficiency of an existing M-type bag clamping device. The M-type bag forming clamping device comprises a mounting frame, a bag clamping assembly, two bag supporting rod assemblies, two M-type bag forming assemblies and two lifting assemblies, wherein the mounting frame is connected with the lifting assemblies; the lifting assemblies are fixedly arranged on a discharging device and used for driving the mounting frame to move up and down; the bag clamping assembly is arranged at a discharging opening of the discharging device; the two bag supporting rod assemblies are arranged on the mounting frame, corresponding to two sides of the discharging device, and used for performing bag supporting action on an M-type bag; each bag supporting rod assembly comprises two bag supporting rods, two bag supportingcylinders, two swing frames and a swing cylinder; the two M-type bag forming assemblies are arranged on the mounting frame, correspondingly arranged on two sides of the discharging device, and used for performing M-type forming recovery action on the M-type bag; each M-type bag forming assembly comprises a forming frame, a forming sheet and a forming cylinder; and the movement area of the formingsheet is in the middle of the bag supporting rod assemblies.

The invention proposes a high repetition frequency narrow pulse laser emitting circuit. It includes a driving circuit and a temperature control circuit of the laser diode; the driving circuit includes a trigger signal source, a charging and discharging circuit and a switching circuit; the driving circuit controls the closing of the switching circuit through the triggering signal, and then controls the frequency and frequency of the laser diode emitting laser through the charging and discharging circuit. pulse width to realize high repetition frequency and narrow pulse laser emission; the temperature control circuit includes a thermoelectric cooler and a peripheral circuit based on a control chip; the thermoelectric cooler is attached to a laser diode for temperature sensing, and the obtained temperature value is input to the The peripheral circuit of the chip, the peripheral circuit realizes the cooling control of the thermoelectric cooler by controlling the chip, thereby reducing the temperature of the laser diode and making it work at a constant temperature. The invention realizes the emission of pulsed laser and effectively improves the working distance and precision of laser ranging.

The invention discloses an efficient charging pile for a new energy vehicle, and relates to the technical field of automobile charging piles. In order to improve the safety during charging, The charging pile specifically comprises two main bodies symmetrically installed on a base, operation screens are arranged on the outer walls of one sides of the two main bodies correspondingly, second supports are fixed to the outer walls of the adjacent sides of the two main bodies through screws, handles are clamped to the second supports correspondingly, the handles are connected into internal circuits of the main bodies through roll type charging wires, and charging heads are arranged at one ends of the handles; and the circumferential outer wall, close to the charging head, of the handle is in threaded connection with a protective cover. By arranging the protective cover, the annular air cushion and other structures, the protective cover can be rotated to the handle through threads according to needs, then the charging head and a charging port of an automobile are protected, the automobile charging device is particularly suitable for external rainy and snowy weather, water can be effectively prevented from entering, and the size of the annular air cushion can be adjusted through the air bag according to actual conditions; therefore, the sealing performance is improved.

The invention relates to a guide shoe (10) for a carding head (7) of a carding bar (1) of a card (K). Said shoe can be pushed onto the carding head (7) in an axial direction (AR). The shoe comprises at least one sliding section (14), which can be positioned between the carding head (7) and a flexible arc (53) and which comprises a sliding surface (11) that co-operates with the flexible arc (53) and is situated on the side facing the latter (53). The sliding section (14) comprises a contact surface (15) on the side facing the carding head (7), said surface being applied, without leaving a gap, to a corresponding supporting surface (30) of the carding head (7). The invention also relates to a corresponding carding head and carding bar.

The invention relates to the field of metal plates, in particular to a slotting type metal plate bending device. According to the technical scheme, the slotting type metal plate bending device comprises a working machine bottom plate, a slotting system, a pressurizing bending system and a bending seam welding system; and the slotting system, the pressurizing bending system and the bending seam welding system are sequentially connected to the upper portion of the working machine bottom plate. The center of a plate is slotted before bending, normal bending of materials is guaranteed, the phenomenon that the left side and the right side of a fold line in a central fold line area extrude each other and then protrude reversely is avoided, a thin metal plate is bent in positioned and protected modes through slotting, obtuse-angle and acute-angle bending with the accurate angle is achieved, and a crack on the outer side of the bent part in the bending process of the acute-angle metal plate isrepaired in positioned and welded modes.

The invention relates to the technical field of basement building construction, in particular to the technical field of high-water-level elevator foundation pit or sump construction, and particularly discloses a component for tubular well precipitation construction in an elevator foundation pit or sump. The component comprises a hollow sleeve, wherein a horizontal support plate, perpendicular to the sleeve, is arranged at the lower part of the sleeve, the sleeve is provided with an eave board above the support plate, the sleeve penetrates through the eave board and the support plate, and the eave board and the support plate are fixed with and in seamless connection with the sleeve; and the part, below the support plate, of the lower part of the sleeve is inserted into a tubular well, and the support plate is horizontally erected outside the opening of the tubular well and used for supporting the sleeve. The invention further discloses a construction method. The construction method comprises the following steps of tubular well precipitation, earth excavation, component mounting, cushion layer construction, water-proof layer construction, foundation raft concrete pouring, earth backfilling, tubular well blocking and the like. By applying the component and the construction method, the construction of the cushion layer, the water-proof layer and the foundation raft of the elevator foundation pit or sump can be conveniently carried out, the construction water-proof quality can be ensured, the construction efficiency can be improved, and the construction cycle can be shortened.

The invention discloses a drawing folding device for petroleum pipeline design. The device structurally comprises a bottom plate, a fixing rod, a torsion spring, a pressing strip and a folding device.The fixing rod is welded to the middle of the bottom plate, the fixing rod is sleeved with the torsion spring, one end of the torsion spring is embedded to the bottom plate, the other end of the torsion spring is embedded into the top face of the pressing strip, the pressing strip is in fit with the bottom plate, and the folding device is connected to the side face of the bottom plate. The drawing folding device has the beneficial effects that the paper page turning action of the human body can be simulated through a paper pick-up mechanism, the excessive paper page turning phenomenon can beavoided, the skidding phenomenon is avoided since timely power is provided by an electromagnetic device for a push device, drawing can be pushed rightwards when the drawing is unfolded, page turning is assisted, the back falling phenomenon is prevented, the drawing flying phenomenon can be avoided through the pressing block, automatic page turning is achieved through the folding device, the excessive page turning phenomenon is avoided, and the error rate is reduced.

The invention discloses a seven-axis machine tool. The seven-axis machine tool comprises a machine tool body and a workbench installed on the machine tool body, the workbench can move in the directionof the machine tool body, the two sides of the machine tool body are each provided with a stand column, a cross beam is installed on the two stand columns, a ram is movably installed on the surface of the cross beam through a sliding rail, a one-axis connecting piece is installed on the ram through a power speed reduction component, a two-axis connecting piece is installed on the surface of the tail end of the one-axis connecting piece through the power speed reduction component, a three-axis connecting piece is installed on the surface of the tail end of the two-axis connecting piece throughthe power speed reduction component, a four-axis connecting piece is installed on the surface of the tail end of the three-axis connecting piece through the power speed reduction component, and a machining main shaft is installed on the surface of the tail end of the four-axis connecting piece through the power speed reduction component. According to the seven-axis machine tool, a series of structures are arranged, so that the seven-axis machine tool has the seven-axis five-linkage function, a Z-axis component of a traditional machine tool is omitted, the structure is simplified, and machining multiple faces of a large workpiece can be carried out.

The present invention relates to an apparatus for rotating and aligning a substrate, and more specifically to an apparatus for rotating and aligning a substrate which aligns a substrate on a mask in a deposition process. The present invention may include: a connection pillar connected to a settling part on which the substrate is settled; a rotating stage which is circular-shaped, fixed with the connection pillar, and a protruding part and a concave part are alternately formed; a power delivering unit which has multiple roller pins arranged separately from one another at fixed intervals, and delivers the power to the rotating stage by rotating in the state that at least one roller pin is pressured and adhered to the concave part at a region of the rotating stage; and a fixing unit which adheres at least one fixing pin to the concave part at another region in the rotating stage in order to have the opposite force of vector to the force applied to the rotating stage of the power delivering unit.

The invention provides a robot end executor. The robot end executor comprises a spindle module, a feeding module and a connecting assembly; the spindle module comprises a spindle and a spindle shell wrapping the periphery of the spindle, the feeding module comprises a screw, a feeding motor driving the screw to rotate and a sliding block fixed to the screw, a machine shell is arranged on the outer side of the screw, the connecting assembly comprises a mounting part fixed to the spindle shell, and the mounting part is fixedly connected with the sliding block. According to the robot end executor, rotation motion of the feeding motor is converted into the linear motion of the spindle through the screw, the influence caused by the reverse gap in a robot transmission chain can be avoided, and the machining precision is improved.

The invention relates to the technical field of cycloid tooth profile design and mechanical transmission of speed reducers, in particular to a cycloid tooth profile matching modification method of a precision speed reducer for a robot, which has the advantages of adapting to the requirement of the robot on the transmission performance of the precision speed reducer under a large-load working condition, and meeting the mutual matching of a cycloid modification tooth profile and meshing contact force; the cycloid tooth profile modification gap is uniform, and the transmission error mean value caused by tooth profile modification is reduced; the normal force at the meshing point of the meshing tooth surface is reduced, and the speed reducer obtains better transmission performance; the methodcomprises the following steps: S1, calculating according to a classical cycloid tooth profile contact force formula to obtain a normal contact force curve; s2, taking the normal contact force curve asa modification parameter to calculate the modification amount of the tooth profile of the cycloid gear in the rectangular coordinate system; s3, on the basis, removing the modification amount coordinate values from the theoretical cycloid tooth profile to obtain a modified cycloid tooth profile; and S4, further calculating the normal backlash generated after cycloid gear tooth profile modification through the modification amount coordinates.

The invention discloses a gravity opening-closing-type deodorization floor drain, and belongs to the technical field of indoor sanitary pipeline devices. The gravity opening-closing-type deodorizationfloor drain includes a gravity opening-closing-type valve element, a copper or stainless steel valve and a valve pipeline design mode. According to the device, gravity generated by the valve elementitself is utilized, so that an upper annular conical surface of the valve element is in contact with a valve annular valve base, upper and lower cavities of the floor drain are sealed, and odor of a drainage pipeline is prevented from returning to a room or the ground; moreover, insects and mice are prevented, water-free isolation is achieved, and the floor drain can be kept in the sealed state all the time; when there is water flow, the water flow enters a water storage container at the bottom of the valve through a valve channel, and the valve element generates buoyancy and the floor drain is opened after water is stored in the water storage container at the bottom of the valve; when the drainage pipeline has reverse surge, the floor drain is automatically closed to prevent the reverse surge. By means of the floor drain, the floor drain is continuously kept closed when there is no water, gas in the drainage pipeline is effectively prevented from overflow, the indoor air quality is improved, and the purpose of deodorization of indoor sanitary pipelines is achieved.

The invention provides a gear box forming a retarding mechanism by chassis, and a massage appliance with a certain axial distance between worm gear and worm. The massage appliance comprises: massage unit (30), which is formed by embarking the massage axis (72) equipped with treating finger (40), massage generator (71) driving said massage axis and reducing mechanism connected by way of transmitting force between massage axis and massage generator on metal chassis (90). The massage appliance is characterized in that the gear box (95) on reducing mechanism is formed by bending the metal board (93) on chassis.

The invention discloses an electromechanical telescopic control mechanism. The electromechanical telescopic control mechanism comprises an inner shell, a partition plate is fixedly connected to the inner wall of the inner shell, a lifting cavity is formed in a position, corresponding to the top of the partition plate, of the interior of the inner shell, a transmission cavity is formed in the position, corresponding to the bottom of the partition plate, of the interior of the inner shell, a rotary lubricating mechanism is arranged at the position, corresponding to the bottom of the transmission cavity, of the interior of the inner shell, and the rotary lubricating mechanism comprises a shaft seat, a lifting rod, a rotating groove and a supporting spring. The electromechanical telescopic control mechanism is scientific and reasonable in structure and safe and convenient to use, the rotary lubricating mechanism is arranged, the lifting rod is driven to rotate through the shaft seat, and therefore the lifting rod is rotated out, and maintaining is conveniently carried out on the lifting rod; and meanwhile, in the process that the shaft seat pushes the lifting rod to be embedded into the rotating groove, a supporting plate is pushed to contract, an upper pushing block in the interior of the rotating groove descends to push a lower pushing block to slide, and meanwhile through cooperation of a connecting rod, the lower pushing block in the interior of an oil storage cavity slides to push the upper pushing block to ascend.

The invention discloses a five-axis numerical control machine tool. The five-axis numerical control machine tool comprises a chip collecting vehicle, a chip removing machine, a left front shield, a tool magazine perspective door, a machine head cover, a movable door, a system controller, a water tank, an oil-water separator, a rear shield, a right movable door, horizontal ground feet, a machine tool base, a tool magazine support, a tool magazine, a telescopic protective cover, a machine head casting, a drag chain, a ram, a spindle, a double-support stand column, a cradle, a workbench, a telescopic protective cover, a guide rail, a lead screw support seat, a lead screw, a servo motor and a machine head casting linear rail. According to the five-axis numerical control machine tool, the amplitude and the inherent frequency can be greatly reduced; a cradle B/C shaft adopts a torque motor direct drive structure, so that the precision of the machine tool can be greatly improved; the high-speed motorized spindle is used as the spindle of the machine tool, the problems of vibration and noise can be well solved, the machining precision and the machining surface roughness of the machine toolare improved, high speed change can be rapidly achieved, that is, the spindle has great angular acceleration during rotation, and the production efficiency can be greatly improved.