2450 results about "Rocker arm" patented technology

The invention discloses a welding fixture for machining a turbine shell, which belongs to the technical field of turbocharger machining and comprises a turntable and adjustable welding clamping mechanisms uniformly distributed in the circumferential direction of the turntable, the adjustable welding clamping mechanism comprises a fixed rack, a movable machine base, an inner supporting type clamping assembly for clamping the turbine shell, an adjustable limiting assembly for positioning the end face of an air inlet of the turbine shell and an adjustable shifting assembly for pushing the turbine shell to rotate. According to the welding clamp for machining the turbine shell, automatic and rapid positioning of the turbine shell can be achieved so that a rocker arm can be welded conveniently, and the welding clamp can adapt to turbine shells of different models.

The utility model relates to a variable-configuration tilting quad-rotor unmanned aerial vehicle which comprises rotors (1), motors (2), main wings (3), a fuselage (4), a vertical fin (7), a power supply unit (8), a control unit (9), tilting steering engines (10), driving rocker arms (11), tilting connecting rods (13), tilting rod supports (16), front tilting rods (17), rear tilting rods, front driven rocker arms (18) and rear driven rocker arms. The tilting mechanism is simple in configuration form, the appearance of the whole tilting mechanism is not greatly changed in the tilting process, and the pneumatic influence in the tilting process is relatively small. When the rotors tilt forwards, a conventional rotor fixed wing aircraft mode is adopted, when the rotors tilt upwards, a conventional four-rotor unmanned aerial vehicle mode is adopted, and various modes and modes such as vertical take-off and landing, hovering and forward flying can be achieved.

The invention relates to a CL imaging system based on multi-axis motion control, the CL imaging system comprises a platform, a side table, a large hollow rotary table, supporting legs and a control system, the platform is provided with an X translation table, the X translation table is located below the large hollow rotary table, the X translation table is slidably connected with a Z lifting table, the Z lifting table is slidably connected with a ray source support, and the ray source support is provided with a ray source; a hollow double-drive XY translation table is arranged above the large hollow rotary table, and the hollow part of the hollow double-drive XY translation table and the hollow part of the large hollow rotary table are overlapped; the side table is arranged close to the side edge of the platform, the side table is perpendicular to the platform and provided with a rocker arm driving rotary table, the rocker arm driving rotary table is connected with a rocker arm translation table, the rocker arm translation table is slidably connected with a detector support, and a detector is fixedly arranged on the detector support. According to the invention, the relative position of the radiation source and the detector is adjusted through the high-precision multi-axis motion control mechanism according to the characteristics of large thickness and large size of a PCB, and full-angle and local flexible CL data acquisition is realized.

The invention relates to the technical field of intelligent unmanned ships, in particular to a wave self-adaptive unmanned ship, a self-adaptive control system and a control method.The wave self-adaptive unmanned ship comprises a main ship body, a front arch, a rear arch, a suspension system, a propelling nacelle, a rigid sliding plate and a buoy, the main ship body is connected with the rear arch and the front arch, and the rigid sliding plate is fixed to the buoy; the propulsion nacelle is installed at the tail of the rigid sliding plate, the rear arch and the rigid sliding plate are installed through two bearings perpendicular to each other, the suspension system comprises a rocker arm, a plate spring and a TPMLM actuator, the rocker arm is connected to the rigid sliding plate, the plate spring and the TPMLM actuator are connected between the rocker arm and the rigid sliding plate and support the rocker arm to be in an upward inclined posture, and the rear arch is connected to the rigid sliding plate. The front arch is connected with the rocker arm, the plate spring and the TPMLM actuator are installed in parallel in the vertical direction, the TPMLM actuator is used for outputting active control force for restraining movement of the ship body, and the unmanned ship, the self-adaptive control system and the self-adaptive control method have the advantages that wave loads can be actively counteracted, and therefore movement restraining is achieved.

A symmetrical link servo driving device, relating to the technical field of servo motors. The symmetrical link servo driving device comprises a driving mechanism, an electric motor, a gear reduction mechanism and a servo shaft rocker arm mechanism, wherein the gear reduction mechanism is in transmission connection with an output shaft of the electric motor, a servo shaft rocker arm mechanism is provided on the side of the gear reduction mechanism facing away from the electric motor, the servo shaft rocker arm mechanism comprises a base body, a servo shaft is rotationally connected to an inner cavity of the base body, and a crank is provided at a shaft body of the servo shaft; a self-locking mechanism capable of locking the servo shaft is provided at the bottom of the inner cavity of the base body; and a driving mechanism is provided on one side of the electric motor, the driving mechanism comprises a housing, a lead screw is rotationally connected in the housing, and the lead screw is correspondingly in transmission connection with an output gear of the gear reduction mechanism. The present invention has a simple structure, and the electric motor and the driving mechanism are arranged in parallel to effectively reduce the overall volume, such that the whole device is compact and small. The self-locking mechanism capable of locking the servo shaft is provided at the bottom of the inner cavity of the base body, that is, when the servo shaft stops rotating, the servo shaft can be locked by means of the self-locking mechanism, thereby preventing an external force from being transmitted to the driving mechanism by means of the servo shaft.

A five-degree-of-freedom zero-gravity simulation suspension device for a space complex unfolding track belongs to the technical field of space mechanism zero-gravity simulation unfolding and mainly comprises a rocker arm frame mounting plate, a rocker arm frame assembly, a spring suspension assembly, a guide rail fine adjustment assembly, a movable constant-force suspension assembly and a mass center point connecting assembly. Wherein the guide rail fine adjustment assembly is used for adjusting the levelness of a guide rail in the movable constant-force hanging assembly. During installation, the rocker arm frame assembly is installed on the rocker arm frame installation plate through screws, the three spring hanging assemblies are installed on the rocker arm frame through the rocker arm frame embracing rings, the movable constant-force hanging assembly is installed on the rocker arm frame through the three guide rail fine adjustment assemblies, and the mass center point connecting assembly is installed on the movable constant-force hanging assembly through the spring buckles. According to the invention, the movable constant-force hanging assembly is added to realize gravity follow-up unloading in the vertical direction, and the mass center connecting assembly containing the spherical hinge assembly is superposed for use, so that the zero-gravity unfolding test requirement of a complex mechanism with five-degree-of-freedom unfolding in space can be met.

A rocker arm system for an internal combustion engine valvetrain includes a base member, a first rocker arm, a second rocker arm, and a saddle. The base member includes a first tower having a first tower recess, a second tower having a plurality of saddle mounting holes, a third tower having a third tower recess, a first rocker gap between the first tower and the second tower, and a second rocker gap between the second tower and the third tower. Each rocker arm includes an arm with a shaft extending through a shaft hole in the arm. A first tower recess central axis and a third tower recess central axis form a first angle having a measurement in a range of between 0° and 25°. The saddle is configured to connect to the second tower by passing a plurality of fasteners through plurality of corresponding saddle through holes in the saddle and into a plurality of corresponding saddle mounting holes in the second tower.

The invention belongs to the technical field of aircraft recovery, and provides an aircraft controllable parachute recovery device which comprises a parachute opening motor (1), a motor support (2), a motor rocker arm (3), a connecting rod (4), a recovery parachute cabin (5), a parachute cabin cover (6), a parachute cabin locking block torsional spring (9), a locking block rotating shaft (10), a driving rod (11), an unlocking hook (12), a spring guide rod (13), an initial locking rod (14), a parachute opening shaft (21), a parachute opening compression spring (18), a parachute hanging screw (17), a recovery parachute (19), a tower spring (20) and a tower spring pressing plate (15). According to the technical scheme, the motor drives the connecting rod mechanism to unlock, the tower spring and the pressure spring are combined to open the parachute, and the problems that an initiating explosive device is low in safety, poor in testability, unrepeatable in recovery and the like are solved.

The utility model discloses a film covering, fixed-point film breaking and soil covering all-in-one machine, which comprises a moving unit, a film covering unit and a soil covering unit, and is characterized in that the moving unit comprises a frame, a first gasoline engine arranged on the frame, walking wheels arranged on the frame, and a transmission part provided with a first transmission wheel; the film breaking unit comprises a second transmission wheel rotatably mounted on the frame, a crank rocker arm mechanism connected with the second transmission wheel, a film breaking rod mounted on the crank rocker arm mechanism and a drill bit mechanism mounted on the film breaking rod, and a transmission chain is mounted between the second transmission wheel and the first transmission wheel; the film mulching unit comprises a film cylinder frame, a film pressing wheel and a soil guiding wheel which are sequentially installed below the frame and in front of the drill bit mechanism from front to back, and the film pressing wheel and the soil guiding wheel are located on the two sides of the frame respectively; according to the equipment, two links of film mulching and fixed-point soil covering are seamlessly integrated, the soil filling and hole sealing operation procedure is moved forwards, the problem that labor is difficult to use in the links is effectively solved, and meanwhile convenience is provided for subsequent transplanting operation.

A door lock device and a vehicle, the door lock device comprising a lock tongue, a locking arm, a matching rocker, a matching rocker arm and an inside opening assembly, the locking arm is used for clamping with the lock tongue; the matching rocker is used for driving the matching rocker arm to rotate when the matching rocker moves; the inside opening assembly is connected with the matching rocker arm, when the inside opening assembly is unlocked, the inside opening assembly drives the matching rocker arm to rotate, the matching rocker arm drives the locking arm to rotate, so that the locking arm and the lock tongue are converted from clamping to separation, and the matching rocker does not move. The inside opening movement and the outside opening movement of the above-mentioned door lock device are separated, so as to ensure that the inside opening stroke and the outside opening stroke do not affect each other.

The invention relates to a rocker arm assembly with roller deactivation. More specifically, a variable valve lift rocker arm assembly may include an outer rocker arm body having a valve end and a cam end and configured to rotate about a first shaft. The inner rocker arm body may be configured to rotate about a first shaft or a second shaft and selectively and operably locked to the outer rocker arm body via a latch assembly. The latch assembly may have a first latch pin actuated by a latch pin spring, a second latch pin, and a third latch pin driven hydraulically, mechanically or pneumatically. The latch assembly may have a locked mode in which relative movement between the inner rocker arm body and the outer rocker arm body is locked, and an unlocked mode in which relative movement between the inner rocker arm body and the outer rocker arm body is permitted.

This technology provides an advantage in reducing manufacturing costs when incorporating pin bodies into eccentric oscillating gear systems. [Solution] The system comprises a crankshaft 14 having an eccentric portion 12, a rocking member 16 that is rocked by the eccentric portion 12, an external gear group 18 that rocks together with the rocking member 16, an internal gear 20 that meshes with the external gear group 18, a first lateral member 22 positioned on one axial side with respect to the rocking member 16, and a pin body 46 that synchronizes the rotational component of the rocking member 16 with the first lateral member 22, with contact being made with a first recess 50 provided in the rocking member 16 and a second recess 52 provided in the first lateral member 22, respectively, wherein the pin body 46 is rotatably provided inside the first recess 50 and the second recess 52, respectively.

The invention relates to the technical field of design of an air suction prevention scheme for a hydraulic rocker gear oil cooling circulating pump of a coal mining machine, in particular to an air suction prevention method for the hydraulic rocker gear oil cooling circulating pump of the coal mining machine and the coal mining machine. Aiming at the problem of air suction damage of a circulating pump caused by change of the inclination angle of the rocker arm, oil suction ports are formed in the lowest liquid level positions of the positive and negative inclination angles of the rocker arm respectively, the inclination angles are monitored in real time through an angle sensor, and an electric control box controls an electric proportional reversing valve to act according to inclination angle signals and drives a hydraulic control reversing valve to be switched to a corresponding working position. And the gear oil circulating pump is always communicated with the current lowest liquid level oil suction port. According to the scheme, the pumping air corrosion risk is thoroughly eliminated, the service life of the pump body and the gear set is prolonged, and meanwhile system energy consumption is reduced. According to the preferable scheme, the filter and the cooler are integrated to form a closed-loop purification cooling loop, and the cleanliness and the thermal stability of the oil are further guaranteed. According to the invention, the adaptability defect of the fixed oil suction port under the dynamic dip angle working condition is overcome, and reliable guarantee is provided for high-load continuous operation of the coal mining machine.

The utility model relates to the technical field of pasture processing equipment, in particular to a wire feeding and knotting device of a square bale collecting machine. Comprising a knotter assembly, a driving assembly and a large needle assembly, the knotter comprises a gear ring, an eagle beak, a rope clamping disc and a cutter arm, the main shaft is installed on a machine frame of the square bale collecting machine, and the main shaft is connected with the driving assembly; the large needle assembly comprises large needles and a U-shaped frame, the multiple large needles are installed on a cross beam of the U-shaped frame, and supporting legs of the U-shaped frame are installed on a rack of the straw bundle collecting and bundling machine and connected with the driving assembly through a rocker arm. The driving assembly drives the main shaft to rotate and drives the large needle to rotate towards the knotter through the rocker arm, the large needle drives the knotting rope to penetrate through the rope clamping disc, the gear ring and the eagle beak, and the rope clamping disc is matched with the tool arm to act to complete knotting operation. Needle threading and knotting actions are ensured to be strictly synchronous, a large needle assembly is ensured to accurately deliver a rope, and a knotter quickly completes knotting; and the knotting quality is high, and the knotted rope fastener is firm, reliable and free of loosening.

The invention relates to the technical field of power construction machinery, in particular to a single rocker arm derrick for hoisting a large-span derrick, which comprises a movable arm, one end of the movable arm is connected to an upper support, a lower support is arranged below the upper support, a transition joint is arranged below the lower support, and a connecting seat A is arranged below the transition joint; the connecting seat A is horizontally connected with two telescopic rods, and the rod heads of the telescopic rods are provided with connecting seats B; the included angle between the two telescopic rods is 90 degrees, and the connecting base A and the two connecting bases B are installed on corresponding iron tower top main materials respectively. The other end of the movable arm is connected with a hook; a rotary support is arranged on the bottom face of the movable arm and connected to the upper support. The derrick can be conveniently and efficiently hoisted.

A rocker arm mechanism comprises a shell, a rocker rod rotationally installed in the shell, a shifting piece fixed outside the rocker rod, a positioner and an elastic piece, and the rocker rod comprises a rotating shaft and a follow-up rod integrally extending in the radial direction of the rotating shaft. The positioner comprises a first positioning piece which is limited in the shell and cannot rotate and a second positioning piece which is fixed to the rotating shaft and rotates along with the rotating shaft, and the elastic piece provides elastic force for the first positioning piece or the second positioning piece. The first positioning piece and the second positioning piece are matched with each other to define a first position and a second position of rotation of the rocker, and the follow-up rod is switched between the first position and the second position on the inner side of the shell along with rotation of the rotating shaft. The shell comprises a base body plate part, a first outer protruding part, a second outer protruding part and an inner concave part, wherein the first outer protruding part and the second outer protruding part protrude outwards from the two longitudinal ends of the base body plate part, the inner concave part is formed by concaving inwards from the middle of the first outer protruding part and the middle of the second outer protruding part, and an inner groove is formed after the inner concave part is concaved. A shaft hole is formed in the inner side of the second outer protruding part and communicated into the inner groove through a through hole, and the elastic piece, the positioner and the shifting piece are contained in the inner groove. The utility model also comprises a rocker switch and a head-mounted device.

A vehicle rocker assembly includes a sill outer and a sill inner that together define an elongated hollow interior. The vehicle rocker assembly also includes a rocker insert disposed within the elongated hollow interior. The rocker insert includes a stiffening member defining a wave-shaped structure and including at least one sheet defining a fore edge, an aft edge, a first side edge and a second side edge opposite the first side edge. Additionally, the fore edge and the aft edge are disposed at different locations along the length of the rocker insert. Moreover, a crest of the wave-shaped structure extends between the first side edge and the second side edge and is configured to carry a load path laterally between the inboard and outboard wall portions.

A symmetrical multi-unit railroad freight car, such as a 3-pack railroad intermodal well car, has body units that are connected symmetrically. The body units have a symmetrical arrangement of end trucks and shared trucks. The end trucks are 70 Ton Trucks. The shared trucks are 125 Ton trucks. The trucks have passive steering using geometric rocker stiffnesses. The rockers in the end trucks have a smaller radius of curvature than the rockers in the shared trucks. The spring groups in the shared trucks are stiffer than the spring groups in the end trucks. The spring groups in the end trucks have a different proportion of damping when empty, a shorter live load range of travel, and greater reserve travel than the shared trucks. The end trucks and the shared trucks have four-cornered damper groups that have the same sized damper wedges. The damper wedges have non-metallic wear pads.

The utility model relates to the technical field of filtering equipment, in particular to a high-efficiency bag filter which comprises a barrel and a supporting foot stool, a barrel cover is arranged at the top of the barrel, a hand wheel rocker arm lifting mechanism is connected to the barrel cover, a liquid inlet pipe and a liquid outlet pipe are arranged on the barrel, and a partition plate is arranged below a barrel opening of the barrel. The inner cavity of the barrel body is divided into an upper cavity body and a lower cavity body by the partition plate, a plurality of filtering openings are uniformly distributed in the circumferential direction of the partition plate, a filtering component is mounted on each filtering opening, a liquid inlet pipe outlet is formed in the position, corresponding to the liquid inlet pipe, of the partition plate, and a flow guide component for guiding waste liquid into the filtering openings is further arranged above the partition plate. By arranging the flow guide cone and the guide plate, waste liquid is guided to flow into the filter bag, the waste liquid is prevented from being retained on the platform for containing the net cylinder, and the problems that the filter bag is blocked, the entering of the waste liquid is influenced under the condition that the entering amount of the waste liquid and the filtering amount are unbalanced, and the continuity of waste liquid recovery operation is influenced are solved. And finally, the continuity of industrial production is influenced.

The invention relates to the field of mechanical engineering, and provides an intelligent centralized control system for a seated double-rocker-arm derrick, which comprises the following steps of: firstly, acquiring real-time attitude data of the seated double-rocker-arm derrick, and inquiring a balance compensation amount; then synchronous swing data of the double rocker arms are collected, a phase difference value is calculated, and arm body correction points are extracted; identifying weight distribution data of the hoisted object, and calculating a torque adjustment value; then, a double-rocker-arm coordination instruction is generated based on the three, and a hydraulic executing mechanism is adjusted; finally, safe operation configuration is collected, a balance threshold value is analyzed to correct the coordination control quantity, an intelligent adjusting signal is generated, and intelligent centralized control over derrick operation is achieved. According to the invention, the operation reliability and automation level of the ground double-rocker-arm derrick under complex working conditions can be improved.

An oil distribution system for an internal combustion engine valvetrain includes a rocker arm base member and a base plate. The rocker arm base member includes a distribution slot disposed into a base lower surface, a plurality of receiving holes extending from a sidewall and / or from the base upper surface of the rocker arm base member into the distribution slot, and a plurality of oil distribution holes passing from the distribution slot through the base upper surface. The base plate being configured to cover at least a portion of the base lower surface including at least a portion of the distribution slot. In operation, the distribution slot receives oil from the plurality of oil receiving holes, passes at least a first portion of the oil to the plurality of oil distribution holes, and the plurality of oil distribution holes discharge at least a second portion of the oil past a base upper surface to provide lubrication to a portion of a rocker arm or other valvetrain components.

The invention relates to a reciprocating type electric shaver with a self-cleaning function, and relates to the technical field of shavers, the reciprocating type electric shaver comprises a body, a tool bit system and a reciprocating type electric shaver of a driving motor, the reciprocating type electric shaver is further provided with a mechanical linkage type air pump module, the mechanical linkage type air pump module comprises a double-chamber air pump, and an air inlet one-way valve and an air outlet one-way valve are arranged on a piston. An air blowing channel and an air suction channel are communicated with the corresponding one-way valves respectively, an outlet and an inlet are communicated with the interior of the tool bit system, a dust collection bin with a filter screen is arranged on a path of the air suction channel, a driving rod transmits power of a driving motor to a piston through a T-shaped rocker arm and a power rod, and the T-shaped rocker arm, an air cylinder, the channel, the dust collection bin and other components are specifically arranged. According to the reciprocating type electric shaver, the technical effects that the reciprocating type electric shaver has the self-cleaning function, beard chippings in the shaver head system can be effectively cleaned, meanwhile, the structure is optimally designed, and the operation stability and the sealing performance are guaranteed are achieved.

The invention discloses a novel stranding machine, and relates to the technical field of stranding machines. The device comprises a bottom plate, supporting frames are fixed to the two sides of the top of the bottom plate, a first inner shaft and a second inner shaft are rotationally installed on the two supporting frames correspondingly, a first outer shaft and a second outer shaft are rotationally installed on the sides, close to each other, of the first inner shaft and the second inner shaft correspondingly, and a U-shaped rocker arm is fixed between the first outer shaft and the second outer shaft; a cradle piece is arranged at the position of the U-shaped rocker arm, a third branch wheel disc, a fourth branch wheel disc, a first branch wheel disc and a second branch wheel disc are fixed to the exteriors of the first inner shaft, the second inner shaft, the first outer shaft and the second outer shaft correspondingly, and wire guide wheels are rotationally installed on the inner walls of the first inner shaft, the second inner shaft, the first outer shaft and the second outer shaft correspondingly. By twisting the metal wires for four times, the production efficiency is doubled under the same spindle rotating speed, and the spindle rotating speed can be reduced by half if the same production efficiency is kept, so that the energy consumption is obviously reduced.

The invention provides a lifting reversing mechanism and a four-way shuttle vehicle, and relates to the field of warehouse logistics, the lifting reversing mechanism comprises a lifting driving device, a rocker arm assembly, a Y-direction walking wheel assembly and a jacking reversing gear box, the lifting driving device is in transmission connection with the rocker arm assembly through the jacking reversing gear box, and the Y-direction walking wheel assembly is in transmission connection with the Y-direction walking wheel assembly; an output shaft of the jacking reversing gear box is located on the central axis of the frame or symmetrically arranged about the central axis of the frame and used for driving the rocker arm assembly to rotate; the rocker arm assembly rotates on the frame, the rocker arm assembly is in transmission connection with the Y-direction walking wheel assembly, and the rocker arm assembly can drive the Y-direction walking wheel assembly to ascend and descend when rotating, so that the Y-direction walking wheel assembly is matched with the X-direction walking wheel assembly on the frame to switch the walking direction. The output shaft is centered to guarantee that power is evenly distributed between the gears on the two sides, load imbalance caused by uneven power transmission is avoided, the Y-direction walking wheel assembly is driven to ascend and descend through the rocker arm assembly, and the bearing capacity and operation stability of the whole structure are improved.

The invention relates to the technical field of radial drilling machines, in particular to a radial drilling machine for machining an electric aluminum shell, which comprises a stand column part, a rocker arm part capable of rotating around the stand column part and moving up and down, and a spindle box capable of moving along the length direction of the rocker arm part, the feeding outer pipe is controlled to ascend and descend through the spindle box, and the rotating inner shaft is controlled to rotate through the spindle box while synchronously following the lifting movement of the feeding outer pipe. The machining efficiency of the electric power aluminum shell is greatly improved, the position of the drill bit part relative to the electric power aluminum shell is more stable through the arranged center inserting cylinder, and the problem that a radial drilling machine is poor in stability is solved.

A pipe cutting device includes a cutting element, a counter-holder, and a C-shaped working head. The counter-holder is formed by the working head and the cutting element protrudes into a C-opening. The working head merges into a foot part and the cutting element is accommodated in a displacement part. The displacement part is movably arranged with the cutting element in an offset part and / or the counter-holder has rollers, and each two rollers are mounted in pairs on a rocker part. A further pipe cutting device has an offset part and a counter-holder which are formed on a C-shaped working head. The working head merges into a foot part which can also be used as a handle area, and the offset part can be offset relative to the foot part in order to change an opening width of the working head. In addition, the offset part has a cutting element.

The invention belongs to the technical field of helicopter rotor calibration, and discloses a rotor total pitch calibration device and method.The rotor total pitch calibration device comprises a variable pitch pull rod, one end of the variable pitch pull rod is connected with a rotor fork lug, the other end of the variable pitch pull rod is connected with a steering engine rocker arm fork lug, and rotor blades are calibrated by adjusting the axial length of the variable pitch pull rod and the relative angle of the end faces of knuckle bearings at the two ends; the auxiliary calibration device is provided with an angle measurement mechanism and a distance measurement mechanism, the distance measurement mechanism is connected to the angle measurement mechanism and can move relatively, and the angle measurement mechanism and the distance measurement mechanism are connected with the knuckle bearings at the two ends of the variable-pitch pull rod through positioning connectors respectively; the gradienter is used for measuring the mounting angle of the rotor blade at the reference position and feeding back the mounting angle to the ground detection equipment; the ground inspection equipment converts the mounting angle into a variable pitch amount and sends the variable pitch amount to the flight control system; and the flight control system generates a control instruction according to the variable pitch quantity and sends the control instruction to a steering engine, and the steering engine manipulates a variable pitch pull rod to achieve total pitch calibration of the rotor wings. According to the method, the problem that existing helicopter rotors are difficult to calibrate is solved, and the total pitch of the rotors can be calibrated with high precision and high efficiency.

The utility model discloses a rolling compression roller device for a large tubular pile forming machine, which comprises a compression roller and stand columns arranged at two ends of the compression roller, each stand column is hinged with a rocker arm connected with the compression roller, two ends of the compression roller are provided with roller shafts, two ends of each roller shaft are provided with shaft sleeves through bearings, one rocker arm is provided with a fixed seat, and the other rocker arm is provided with a fixed seat. A connecting seat connected with the fixed seat is arranged on the shaft sleeve at the same end, and an opening and closing device clamped on the shaft sleeve at the same end is arranged on the other rocker arm; the opening and closing device comprises a fixed clamping groove formed in the outer end of the rocker arm and a movable clamping groove matched with the fixed clamping groove to be clamped on the shaft sleeve, and a hydraulic cylinder used for driving the movable clamping groove to be opened and closed is arranged on the rocker arm. By arranging the opening and closing device, the compression roller is more convenient to replace and maintain, the whole compression roller is replaced by arranging the compression roller sleeve and the wedge-shaped compression ring and detaching the bolts and replacing the deformed two ends, the maintenance period is shortened, and materials are saved.