80results about How to "Small transmission clearance" patented technology

The invention relates to a hollow type drive and control integrated intelligent modular joint. The hollow type drive and control integrated intelligent modular joint comprises an outer shell, an incremental encoder, an absolute value encoder, a braking device, a harmonic reducer, a motor output shaft, an output flange, a control device, a left end cover, and a hollow wiring pipe. The hollow type drive and control integrated intelligent modular joint is characterized in that the joint further comprises a hollow frameless torque motor; the control device, the incremental encoder, the braking device, the hollow frameless torque motor, the harmonic reducer and the absolute value encoder respectively sequentially sleeve the motor output shaft and the output flange; the output flange, the outer shell and the left end cover form a closed space; the closed space is internally provided with the incremental encoder, the absolute value encoder, the hollow frameless torque motor, the braking device, the harmonic reducer, the motor output shaft, the control device and the hollow wiring pipe; and the hollow wiring pipe penetrates through an inner cavity of the output flange, a flexible gear and a rigid gear of the harmonic reducer, a wave generator, and the motor output shaft.

The invention provides a winding head mechanism which comprises a base, a sliding ring, a following plate, a station change motor and at least one winding main body, wherein the sliding ring comprises a rotor and a stator which can rotate relatively; the stator is fixed on a limiting bracket; the following plate is fixedly connected with the rotor of the sliding ring, and can rotate relative to a main supporting part. According to the winding head mechanism provided by the invention, due to the rotatable matching between the rotor and the stator in the sliding ring, the problem that a cable is knotted in the prior art is solved; meanwhile, a winding motor is mounted on the following plate to directly drive a winding driving shaft to rotate and further drive a winding needle to work, so that a transmission gap and an error can be reduced; furthermore, the response speed can be greatly increased, and the winding quality and the efficiency are improved; moreover, speeding up of variable rotating speed control is facilitated, so that the production efficiency is greatly improved, and the equipment cost and the production cost are reduced.

The invention discloses a missile wing single side wing face folding mechanism which comprises a through-connection connector, a missile wing connector, bearings, a missile wing rotary shaft, a pretightening nut, a fastening nut, an actuating device and a spring locking pin. The through-connection connector, the missile wing connector and the bearings are assembled into a rotary pair through the missile wing rotary shaft, the pretightening nut and the fastening nut. The wing face folding mechanism is connected with a missile through the through-connection connector. The missile wing connector and a missile wing are integrally formed or connected through fasteners. The actuating device transmits power to the missile wing connector through a lug piece on the missile wing connector, so that the missile wing connector is made to drive the missile wing rotary shaft and inner rings of the springs to rotate around outer rings of the springs; when unfolding is conducted in place, the missile wing connector is locked through the spring locking pin, and the missile wing is locked. The missile wing single side wing face folding mechanism is modular, simple and reliable in structure and convenient to dismount and mount; mounting space occupied by modules is small, and the space utilization rate of the missile is saved; a transmission clearance and a joint movement clearance are small, and the transmission efficiency of the mechanism is high; the missile wing single side wing face folding mechanism can be applied to multiple missile wing folding and unfolding mechanisms in linear missile wing layout through refitting.

The invention discloses a breaking loading roadway repairing machine. A vehicle body part comprises a worktable, a driving device, a running device, an oil tank and a supporting leg, wherein the driving device and the running device adopt a hydraulic transmission mode, the driving device is a hydraulic driving device, is arranged at the rear portion of the worktable and comprises an explosion-proof diesel engine and an oil pump, the explosion-proof diesel engine transmits the oil pump through a coupler, an input port of the oil pump and the oil tank are communicated through an oil path, and an output port of the oil pump and two sets of oil path control valves are communicated through oil paths. Liquid is supplied to the running device and each oil cylinder through the two sets of oil path control valves, the H-shaped supporting leg is arranged at the rear portion of a support of the vehicle body, and the supporting leg is matched with a supporting leg guide rail in a sliding mode.

The embodiment of the invention provides an electromechanical actuator and a control method thereof, and belongs to the technical field of electromechanical servo. The actuator comprises a first motorassembly, a second motor assembly, a first actuating rod and a second actuating rod, wherein the first actuating rod is driven by the first motor assembly, the second actuating rod is driven by the second motor assembly, the first actuating rod is of a hollow structure, the first actuating rod and the second actuating rod move relative to each other under driving of the first motor assembly and/or the second motor assembly, and the second actuating rod partially moves in a cavity of the first actuating rod. By the actuator, dual-redundancy control can be achieved, a normal working mode and abackup working mode can be set, and switching between the working modes is performed according to a special fault; and compared with a hydraulic servo system and an electromechanical hydrostatic servosystem, the actuator has the advantages that the actuator has more flexible and reliable redundancy management mode, and the problem of a fault caused by a roller or a ball screw which is stucken isprevented.

The invention discloses a repairing machine for a broken loading roadway. The machine comprises a vehicle body part and an execution mechanism, wherein the vehicle body part comprises a work table, a driving device, a walking device, an oil tank and supporting legs, the driving device is in hydraulic transmission with the walking device, is a hydraulic driving device placed at the rear part of the work table and comprises an anti-explosion motor and an oil pump, the anti-explosion motor drives the oil pump by a coupler, the input opening of the oil pump is communicated with the oil tank by an oil-way, and the output opening of the oil pump is communicated with two oil-way control valves by the oil-way; liquid is supplied to the walking device and each oil cylinder by the two oil-way control valves.

The invention discloses a variable-transmission-ratio circulating ball type electro-hydraulic steering system and a control method thereof. The variable-transmission-ratio circulating ball type electro-hydraulic steering system comprises a steering wheel module, a variable-transmission-ratio hydraulic power assisting module, a mechanical transmission module, a motor power assisting module and a main controller module. According to the electro-hydraulic steering system, different motor power-assisted modes can be selected according to transmission ratio signals of different working conditions, steering is controlled through coordination of the hydraulic power-assisted motor and the electric power-assisted motor, the magnitude of steering power can be adjusted along with the transmission ratio signals of harmonic rotation angles, the three advantages of fast electric response, large hydraulic assistance and good variable transmission ratio stability are fused, the response speed is increased, the anti-interference capability is enhanced, and the overall energy consumption is reduced to a certain extent.

The invention provides a compact steering engine and a steering engine cabin. The compact steering engine comprises a motor, a coupling, a lead screw, a lead screw fixing frame, a lead screw nut, a nut seat, a connecting piece, a connecting rod, a joint bearing, a first dialing pin and a second dialing pin. The motor is connected with the lead screw through the coupling. Power of the motor is transmitted to the lead screw. The lead screw is fixed on the lead screw fixing frame. The lead screw nut is mounted on the lead screw and is fixedly connected with the nut seat. The connecting piece is connected with the connecting rod through the second dialing pin. The connecting rod and the connecting piece have no relative displacement in the z-axis direction while can rotate relatively in the xyplane. The compact steering engine is simple in structure, high in mechanical transmission efficiency and small in transmission gap.

The invention provides an electronic digital display lever indicator which is related to a displacement metrologic instrument. The indicator comprises a main body, a surveying rod, a handsetting lever, a lever arm and a bell crank lever; wherein, the surveying rod is hinge jointed on the main body and provided with a measuring head, the handsetting lever of a deflector rod is arranged in the main body and provided with an upper contact side face and a lower contact side face, the lever arm is hinge jointed on the main body and provided with a upper pulling pin and a lower pulling pin which are matched with the upper contact side face and the lower contact side face on the deflector rod in the handsetting lever, the bell crank lever of a bell crank lever arm is at right angles to the lever arm and provided with a contact terminal, the lower end of a movable shaft which is arranged on the main body and can move upward and downward is contacted with the contact terminal on the bell crank lever arm, the movable grid in a capacitance grid electronic digital display assembly which is provided with a movable grid, a fixed grid and a signal processing circuit with a display screen is connected to a movable shaft, and the resolving power of the capacitance grid electronic digital display assembly is 0.01 mm or 0.001 mm. The invention uses lever reversion and lever operation to digitally display results, and has the advantages of visualized and exact reading and low manufacture cost; and in addition, the resolving power is 0.01 mm or 0.001 mm.

The invention discloses a commercial vehicle variable-transmission-ratio electric steering system and a control method of the variable-transmission-ratio electric steering system. The variable-transmission-ratio electric steering system comprises a steering wheel module, a variable-transmission-ratio transmission module, a double-winding motor power assisting module and a main controller module. According to the invention, a harmonic gear mechanism drives a circulating ball type steering gear to achieve the variable transmission ratio function, the transmission ratio range is large, the bearing capacity is high, the transmission is stable, and the precision is high; and meanwhile, the working modes of the motor can be accurately switched according to the transmission ratio of the steering system under different working conditions, the active safety of the vehicle is enhanced, the requirements for steering sensitivity during low-speed driving and steering stability during high-speed driving of the vehicle are both considered, and the characteristics of large transmission ratio and large torque needed by a commercial vehicle are met at the same time.

The invention discloses a long-stroke large-load dual-drive horizontal linear motion platform which can bear large loads and large overturning moment, is wide in motion range and meanwhile, and has quite high positioning precision. The platform comprises a base, a platform board, sizing blocks, guide rails, sliding blocks, rollers, racks, drive devices, laser distance meters and limiting blocks, wherein the leveling sizing blocks are installed below the base and can level the base; and the rollers are installed on output shafts of the drive devices and engaged with the racks, and the platform board can be made to do horizontal linear motion along the guide rails installed on the base. Meanwhile, a feedback device feeds back signals in real time. The limiting devices are installed on the two sides of the base.

The invention discloses a rotary printing online punching device which comprises a first side plate, a second side plate, an upper connecting rod, a lower connecting rod, an upper mold shaft, a lower mold shaft, an upper mold, a lower mold, shaft sleeves, an adjusting mechanism and transmission gears. The first side plate and the second side plate are arranged in parallel. The two ends of the upper connecting rod are fixedly connected with the upper portion of the first side plate and the upper portion of the second side plate respectively, and the two ends of the lower connecting rod are fixedly connected with the lower portion of the first side plate and the lower portion of the second side plate respectively. The upper mold shaft and the lower mold shaft are installed on the first side plate and the second side plate with the upper axis and the lower axis in parallel. The upper mold shaft and the lower mold shaft are connected with the first side plate and the second side plate through the shaft sleeves, and one end of the upper mold shaft and one end of the lower mold shaft are meshed together three the two transmission gears. The rotary printing online punching device is convenient to operate, simple in structure, high in efficiency and precision and wide in applicability.

The invention provides a compact vehicle-borne antenna lifting device which comprises a base and a shell. The base and the shell are fastened through screws to form a cavity. The base is equipped with a stepper motor. The output end of the stepper motor is connected to a worm shaft via a coupling, the other end of the worm shaft is provided with a bearing and a bearing end cover. One side of the coupling is provided with a large gear which is connected to an operation shaft via a small gear. The worm shaft is connected to a rotation shaft via a worm wheel. Two ends of the rotation shaft extend out of the shell and are connected to connection rods. The connection rods and an antenna mounting base are connected in a fastening way, and the connection rods can rotate with the rotation shaft. The compact vehicle-borne antenna lifting device has the advantages of simple operation, high bearing capacity, high reliability, a compact structure, and good waterproof and dustproof performance.

The invention relates to the technical field of vehicle auxiliary instruments, and aims to provide a lifting device. According to the technical scheme, the lifting device comprises a base, a lifting frame, a lifting assembly and a driving assembly; the lifting frame is rotationally connected with the base; one end of the lifting assembly is rotationally connected with the lifting frame, and the other end of the lifting assembly is rotationally connected with the end, away from the lifting frame, of the base. The driving assembly is arranged on the base and used for driving the lifting assembly to stretch or retract. The lifting assembly comprises a ball screw pair, a positioning sleeve and a supporting rod, the end of a screw of the ball screw pair is sleeved with the positioning sleeve, the positioning sleeve is rotationally connected with the base, one end of the supporting rod is rotationally connected with the lifting frame, and the other end of the supporting rod is connected with a nut of the ball screw pair; the driving assembly comprises a servo motor, and the output end of the servo motor is in transmission connection with a screw of the ball screw pair. The device is high in positioning precision, fast in motion response, small in transmission gap, compact in structure and applicable to special vehicles.

The invention relates to an electronic hydraulic brake comprising a penetrating rod, a shell, a push rod, a sleeve, an elastic element, a gear nut, a lead screw, a sliding block, a displacement sensor, a main cylinder piston, a main cylinder, a motor, a gear set, a pedal and an ECU. The penetrating rod passes through the shell and then is fixed to the main cylinder. The push rod connects the pedaland the elastic element; the push rod and the sleeve slide in the screw rod; the sleeve clings to the push rod and the slide block; the elastic element is connected with the push rod and the slidingblock; the outer ring of the lead screw is meshed with the gear nut; the sliding block is connected with the elastic element and the displacement sensor; the sliding block and the main cylinder pistonare spaced; the displacement sensor is fixed to the shell and one end of the displacement sensor is attached to the sliding block; the main cylinder is fixedly connected with the penetrating rod; themotor is fixed to the shell, one end of the motor is connected with the gear set, the gear set is fixed to the shell, and the pedal is connected with the push rod.The ECU receives signals of the displacement sensor and controls the motor to act. With the combination mode of the gear set and the lead screw nut, the structural space is saved, and the transmission gap is reduced.

The invention discloses a disc type tool magazine utilizing a harmonic reducer. The disc type tool magazine utilizing the harmonic reducer comprises a rigid gear, a flexible gear and a wave generator. The wave generator is connected with a motor. The rigid gear or the flexible gear is connected with a driven module and the driven module is connected with a cutterhead. Fixtures are arranged on the cutterhead. According to the disc type tool magazine, the transmission clearance can be small during the transmission and the transmission clearance would not be increased when the tool magazine is used in the way that the transmission from the motor to the cutterhead is completed by the harmonic reducer, so that a clearance eliminating structure does not need to be arranged and the integral structure of the tool magazine can be simplified; the motor and the harmonic reducer both work within the rated rotating speed, so that wear and heat generating can be effectively reduced, and the service life of the motor and the reducer can be improved; a harmonic transmission mechanism can obtain larger reduction ratio directly and the position accuracy when the tool magazine rotates is high; the transmission ratio and the transmission accuracy can be controlled stably and the transmission noise is lower than a worm gear because of a smaller wear; the output mode can be switched according to the load requirement, for example, a user can fix the rigid gear and use the flexible gear for output, or fix the flexible gear and use the rigid gear for output.

The invention belongs to the technical field of new energy, and in particular relates to a high-efficiency solar tracker, which includes a fixed column, a rotating column is arranged on the fixed column, and a first speed reducer is arranged between the fixed column and the rotating column. Both sides of the rotating column are respectively connected with a first diagonal brace and a second diagonal brace, and the first diagonal brace and the second diagonal brace are connected with a main beam, and the main beam includes a first support arm and a second support arm. , one end of the first support arm is provided with a second reducer, a support frame is provided between the first support arm and the second support arm, the first brace is connected to the first support arm, and the first support arm is connected to the first support arm. The two diagonal braces are connected with the second support arm, the interior of the rotating column is hollow, and there are input pipes and output pipes inside, the first conversion joint and the second conversion joint are provided on the input pipe, and the output pipe is provided with For the third conversion joint and the fourth conversion joint, a first vertical shelf, an intermediate vertical shelf and a second vertical shelf are arranged on the top of the main beam.

The invention discloses a small planetary gear reducer with a large transmission ratio. The dear reducer comprises a box body. The periphery of the box body is provided with fixed inner gear. A sun wheel is arranged in the box body as the input end. Planet wheels are placed between the inner circular area and the outer circular area of the box body. The outer circulars of the planet wheels simultaneously mesh with sun wheel outer circle and an inner gear ring of the fixed inner gear. The planet wheels make the combined motion of rotation and revolution under the restrictions of both the sun wheel and the fixed inner gear. An output shaft has one side located in the box body. A floating inner gear is placed in the box body, and is arranged at one end of the output shaft. An inner gear ring of the floating inner gear meshes with the outer circle of the planet wheels. A planet carrier is located in the box body. One end of the planet carrier is coupled with one end of the output shaft by a first bearing, and the first bearing also supports the planet carrier to make the output shaft and the floating inner gear suspend, and plays a function of axial positioning. The planet carrier comprises a side plate. The side plate is connected with the planet wheels through planet wheel rotation shafts. The small planetary gear reducer with a large transmission ratio can reduce a transmission clearance to suit the situations of shock load and frequent positive inversion.

The invention provides a total immersion liquid numerical control turntable for an electric spark machine tool. The numerical control turntable comprises a sealed turntable box; an alternating current servo motor, a harmonic transmission speed reducer, a transmission mechanism and a rotating main shaft are arranged in the turntable box; the output shaft of the alternating current servo motor is directly connected with the input shaft of the harmonic transmission speed reducer; the harmonic transmission speed reducer and the rotating main shaft are arranged in the turntable box; the output shaft of the harmonic transmission speed reducer is arranged in parallel to the rotating main shaft connected with the numerical control turntable; the transmission mechanism is arranged between the output shaft of the harmonic transmission speed reducer and one end of the rotating main shaft; and the other end of the rotating main shaft extends out of the turntable box in a sealing manner, an electric brush is connected to the rotating main shaft, and a pneumatic chuck capable of supporting a quick change system is assembled on the extending end. The rotating component of the numerical control turntable is high in sealing property, precision guarantee technology and reliability; and the numerical control turntable is simple in manufacturing process and good in protective property.