Showing papers on "Reducer published in 1988"

Electric motor with frictional planetary speed reducer

Abstract: An electric motor having a frictional planetary speed reducer comprises a hollow cylindrical rotor disposed inside a stator. The speed reducer is at least partly accommodated in the rotor.

Telescopic screw jack for the adjustment of an element such as a vehicle seat

Abstract: The jack comprises a tubular primary screw (10) provided with an outer screw thread and an inner screw thread having opposite thread hands, a secondary screw (11) cooperative with the inner screw thread and having an end (11a) articulated to a fixed point, a nut (9) fixed in rotation and connected to move in translation with the element to be adjusted and cooperative with the outer screw thread, a speed reducer associated with a motor (M) for driving the primary screw (10) in rotation, and means for preventing a rotation of the speed reducer (13) relative to the nut (9). These means comprise an articulated compass structure (18) having two branches (18a, 18b) articulated together. One of the branches is also articulated to the speed reducer (13) while the other branch is articulated to a part (9) of the jack which is fixed in rotation. The compass structure (18) considerably reduces the friction and improves the efficiency of the jack.

A stepless speed reducer

Abstract: A stepless speed reducer includes the mechanical power transmission lines for high speed and low speed, the two lines being selectively concluded to effect power transmission. When the working speed ratio comes near a predetermined critical speed ratio, the operation is maintained at the critical speed ratio while the pump motor for low speed is kept inoperative and no pressure difference exists between the transmission circuits, thereby transmitting power through the line for high speed.

Combination accessory drive and speed reducer

Abstract: In combination with a conventional vehicle accessory drive pulley directly mounted and driven by a crankshaft 10 an epicyclic gear speed reducer set (F) is assembled as a unit A which comprises input and reaction sun gears (B,C). A combination planet carrier and drive casing (D) carries a plurality of compound planets (40,42), and an idler gear (43). Drive casing (D) of the assembly includes an integral pulley (34). Locking the reaction sun gear (C) to the carrier drive casing (D) produces a direct drive between the crankshaft and accessory. Braking the reaction sun gear to the engine frame (58), will switch the pulley assembly from direct drive to a reduction drive. This is accomplished automatically at a predetermined vehicle speed.

Portable aircraft moving device

Abstract: A portable aircraft moving device comprising a portable electric drill containing a drive shaft extending from the drill output shaft to a worm gear reducer having an output shaft connected to a drive wheel that is mounted temporarily to the front wheel of an airplane above the airplane wheel, the drive shaft located inside a straight hollow support tube attached between the drill and the gear reducer, so that by actuating the trigger on the drill, causes the drive shaft to be turned and produce, through the gear reducer, rotation of the drive wheel on an axis parallel to the axis of the airplane's wheel. Pivotal means are employed to allow the drive wheel to be rotated into contact with the airplane wheel, by lowering the drill, to impart rotation to the airplane's wheel and movement to the airplane.

Motor-speed reducer device including safety means for driving an element

Abstract: A motor-speed reducer includes a driving input shaft, an output shaft and a deformable coupling coupling the input shaft to the output shaft. The coupling includes a worm and a speed reducer driven by the worm. A sensor is also provided for detecting torque between the input shaft and the output shaft during operation of the device which causes deformation of the coupling. The sensor includes two electrically conductive tracks. One track is associated with an input side of the coupling and the other track is associated with an output side of the coupling. An electrical circuit is connected to the tracks and monitors movement of each track to detect a change in torque as a function of a change in the movement of one of the electrically conductive tracks relative to the other track.

Pressure reducer for pure gases

Abstract: A pressure reducer, especially adapted for the supply of very pure gas in the electronics industry, which comprises a final stage having an inlet, pressure-reducing means and a low-pressure outlet. A filter having a filtration threshold lower than a micron is interposed between the pressure-reducing means and the low pressure outlet.

Apparatus for testing braking characteristic of rotation transmitting body

Abstract: PURPOSE:To evaluate the various characteristics of a rotation transmitting body, by quick-starting and-braking a tachogenerator and rotary encoder integral type servo motor being the drive motor to the rotation transmitting body. CONSTITUTION:When a drive motor 1 is quick-braked from steady rotation, since the input shaft of a speed reducer 4 as an object to be tested is ready to stop but a fly wheel 6 as load is ready to continuously rotate by its inertia, said quick braking acts on the output shaft of the speed reducer 4 as quick load. The braking characteristic of the speed reducer 4 at this time is measured. That is, load torque is measured by a torque meter 5, an input rotational speed is measured by a drive side DC tachometer 2, an input signal of rotation and a rotational speed are measured by a drive side rotary encoder 3, an output rotational speed is measured by a load side DC tachometer 8, and an output rotational speed and an angle of rotation are measured by a load side rotary encoder 7. By this method, various characteristics of a rotation transmitting body can be evaluated.

Nc mechanical press for powder molding

Abstract: PURPOSE:To improve quality and productivity by providing a control system which makes decision as to the adequateness or inadequateness of molding from the pressurizing forces generated by respective punches, the calculation of an adequate packing depth and the change of molding conditions at every molding cycle, thereby maintaining the specified molding pressure. CONSTITUTION:This press has an upper punch 41 driving mechanism having a servo motor, speed reducer, and link mechanism, etc., a lower 1st punch 13 driving mechanism likewise having a servo motor, etc., and a lower 2nd punch 28 driving mechanism having a servo motor, etc., and precision guides. The press has a powder feed means installed movably rectilinearly back and forth on a feeder table. The press has molding pressure detecting means consisting of the load cells of the respective punches and the position detecting means of the respective punches. The press is constituted of the control system consisting of a computer, NC controller and sequencer for executing the formation of operation data and NC programs and monitoring of the operating condition of the press. All of the setting of the positions and moving quantity of the respective punches are executed by the computer in this way and, therefore, the setting is exact and has reproducibility and the productivity is improved.

Waistband reducer for pants

Abstract: A waistband reducer for pants including an elongate generally elastic and flexible element or strap having a plurality of fastener elements for connection along a waistband to contract the waistband about the wearer's waist.

The design and control of a robot finger for tactile sensing

Abstract: This article describes the design and control of a lightweight robot finger intended for tactile sensing research. The finger is a three-link planar chain with the joints actuated through cables by two motors. Kinematic coupling of the three joints provides two degrees of freedom for finger tip manipulation, and a curling action of the finger for enclosing an object. Hall effect sensors in each joint provide position feedback, and strain gage sensors on each cable provide tension information. To minimize weight and power consumption, a high speed low torque motor together with a 172:1 speed reducer is used as the actuator. A force control loop around the motor speed reducer system reduces the effect of the friction inherent in the speed reducer. Flat mounting plates are provided on each link for special purpose grasping surfaces and sensors.

Handy image reader

Abstract: PURPOSE:To eliminate an influence due to an individual difference as much as possible and to obtain a stable scan speed in a subscanning direction by driving by a motor in which a travelling roller is internally mounted in a main body case. CONSTITUTION:The main body case 2 is placed on an original surface 1, and a switch 17 is pressed, thereby, the light source of an LED array 6 is lighted, at the same time, the motor 10 is rotated, the travelling roller 7 is rotated through a speed reducer 11, reduction gears 14-16 and the main body case 2 is moved in parallel to the sub-scanning direction at a prescribed set speed to read the original. In the other rotation axis of the motor 10, a rotary encoder disk 12 is rotated, pulses corresponding to the number of rotations are generated by a photoelectric transfer device 13 to form the moving pulse to the sub- scanning direction and synchronize a main scanning and the sub-scanning.

Multistep speed reducer

Abstract: PURPOSE:To aim at the promotion of miniaturization and lightweightiness by setting at least the final step down to an inscribed engaging type epicyclic reduction gear, and making a difference in the number of teeth between the engaging internal gear and the external gear into more than two teeth, in case of a multistep speed reducer for driving a robot arm of the like. CONSTITUTION:External gears 441 and 442 are fitted in eccentric bodies 421 and 422 of an intermediate accentric body shaft 41 at the side of an input shaft via a roller 43, and the trochoidal external gear is inscribedly engaged with a circular tooth profile consisting of an outer pin 46 of an internal gear 45, constituting a first step speed reducing part. At a second step speed reducing part, external gears 651 and 652 are fitted in eccentric bodies 631 and 632 of the hollow eccentric body shaft 62 connected to the first external gear 44 via a roller 66 by an inner roller 48, and the trochoidal tooth profile is inscribedly engaged with a circular tooth profile consisting of an outer pin 69 of an internal gear 68, thus outputted from an output flange 72 by an inner pin 71. Here, a difference in the number of teeth between the internal gear 68 and the external gear 65 is made into more than two teeth. Thus, a high reduction gear ratio capable of transferring a large torque is secured, and the promotion of miniaturization and lightweightiness can be made possible.

Speed reduction mechanism vibration isolator

Abstract: PURPOSE:To negate the torque fluctuations and reduce the resonance vibration by setting the gear ratio between a motor shaft pulley and the input shaft pulley of a harmonic driven speed reducer to 1:2 and making the motor shaft pulley eccentric. CONSTITUTION:The gear ratio between a motor shaft pulley 3 and the input shaft pulley 4 of a harmonic drive speed reducer 2 is set to 1:2, and both pulleys 3, 4 are connected by a timing belt 5. The motor shaft pulley 3 is formed in an eccentric pulley. Accordingly, two torque fluctuations generated due to the harmonic driven speed reducer 2 for each rotation of the speed reducer input shaft are negated, and the resonance vibration of a robot arm or the like can be reduced.

Chute driving mechanism in raw material charging apparatus in blast furnace

Abstract: PURPOSE: To simplify a raw material charging apparatus and to reduce equipment cost and operation cost by rotating a vertical chute with a swing motor through a revolving Roballo (cylinder) and rotating a lower chute with an inclinable motor through transmitting shaft longitudinally penetrating the vertical chute. CONSTITUTION: At furnace center part in a bell-less type blast furnace, the vertical chute 1 and a charging chute 2 protruding downward to radius direction from the lower part thereof are fitted, and further, at the end part of the charging chute 2, the lower chute 3 is fitted to be inclinable. In the above raw material charging apparatus in the blast furnace, the vertical chute 1 is rotated by driving the turning motor 13 through the revolving Roballo 11 and a differential reducer 14 fitted on outer circumference of the vertical chute 1. On the other hand, the above lower chute 3 is rotationally inclinedly revolved by driving the inclinable motor 16 through gears 18, 19, the transmitting shaft 12 longitudinally penetrating the vertical chute 1 and the differential reducer 14. By the raw material charging apparatus having simple chute driving mechanism, the raw material for the blast furnace is charged in the prescribed position in the furnace. COPYRIGHT: (C)1990,JPO&Japio

Vibration isolating device for speed reducing mechanism

Abstract: PURPOSE:To reduce the resonance vibration, by making the gear ratio of an idler pulley to a speed reducer input shaft pulley 1 to 2, and making the idler pulley have a proper eccentricity. CONSTITUTION:A motor shaft pulley 3, a speed reducer input shaft pulley 4, and an eccentric idler pulley 5 are connected by a timing belt 6. The number of teeth of the eccentric idler pulley 5 is restricted to 1/2 of that of the speed reducer input shaft pulley 4. Thus, the torque fluctuation attributable to a harmonic drive speed reducer is compensated by the torque fluctuation caused by the timing belt, and the resonance vibration can be reduced.

Structure for revolving barrel of industrial robot

Abstract: PURPOSE: To reduce the number of mechanism parts and to improve the reliability of a robot performance by providing a bearing integrally assembled in a speed reducer as the bearing for rotation support between a fixed base and robot revolving barrel. CONSTITUTION: A speed reducer 60 is composed by equipping an input rotating shaft 61, a 1st speed reducing part 60a, 2nd speed reducing part 60b, output rotating shaft 62, outer case 64 and a pair of bearings 65. The bearings 65 are interposed as the incorporated element integrated between the 1st and 2nd speed reducing parts 60a, 60b and outer case 64, forming the rotating bearings of between an input system and output system and functioning as the bearing performing the rotating support of between the robot fixing base and robot revolving barrel. Accordingly, the robot parts of the bearing which was necessitated in the past, the holder holding it, etc., are reduceable and the number of the robots parts can be reduced. Also, the reliability is high as well because of the speed reducer parts equipped integrally in the speed reducer 60. COPYRIGHT: (C)1990,JPO&Japio

Movable teeth resonance speed retardation device

Abstract: The utility model relates to a movable tooth resonance speed reducing device which is a mechanically driven speed reducer. The movable tooth resonance speed reducing device utilizes a movable teeth mechanism to match with a tooth groove of a fixed gear which is provided with definite profile curves to realize speed reducing drive. The utility model has no flexible gear of the common resonance speed reducing device which is difficult to process, and has no W output mechanism of a speed reducer with very little tooth difference or a cycloid pin gear speed reducer which is easy to be damaged. The utility model has the advantages of simple structure, easy fabrication, small volume for transferring the same power (or output torque) under the same speed ratio, stable operation, low noise, high efficiency, etc.

Compressor built-in spray gun

Abstract: PURPOSE:To provide an inexpensive spray gun excellent in a uniform coating property, by mounting a battery in the spray gun and utilizing compressed air sucked by the rotating of a motor to spray paint. CONSTITUTION:A motor 2 is started by the power of a battery 8. After the rotatory power of the motor 2 is reduced by a speed reducer 3, a cam 4 is rotated by larger torque and compressed air is obtained by the sucking compression operation of an air compressing member 5 and guided to a spray nozzle 7 from an exhaust valve 62 by piping. A gas nozzle 71 has an orifice at the leading end part thereof and the compressed air enhanced in the flow speed at said orifice sucks up the liquid in a liquid receiving tank 10 by siphon action to atomize the same from a liquid nozzle 72. By operating a spray amount control needle 73, a fine blow-off width of about 5-50mm is obtained.

Rolling method for reducing rolling mill for seamless steel tube

Abstract: PURPOSE:To prevent generation of seizing of a roll caliber part and of flaws at edge parts of a seamless steel tube by forming an oil film of a lubricating oil on an area in the caliber part of a grooved roll whose roll peripheral speed difference from that of the caliber central part exceeds a specific value. CONSTITUTION:In a roll lubricator, a lubricating oil 15 is supplied to respective stands through a pump 14, distributor 12. The oil 15 is mixed and sprayed with an air 16 supplied to respective stands by an air distributor 13 by a mixer 11 at a prescribed ratio. The spray is equally distributed toward edge parts 4 at both end of a stretch reducer roll 1 through a lubricating oil injection pressure control valve 10 and a lubricating oil equalizer 9 in a roll stand. The oil 15 is sprayed onto the edge parts 4 by injection nozzles 7 to form lubrication areas 6 whose spread width is over an area whose roll peripheral speed difference from that of the roll caliber central part is >=0.45 m/sec. A roll cooling water 17 is injected from an injection nozzle 18 to form a non-lubricating area 5. Thus, seizing of the roll caliber part is prevented.

Dual gear reducer

Abstract: The utility model relates to a dual gear speed reducer which is a novel machine rotary device and overcomes the disadvantages of small transmission speed ratio and big volume existing in the prior cylinder gear speed reducer, making the utility model become a speed reducer with simple structure, easy manufacture, big transmission speed ratio which can reach to one to a plurality of hundred thousand, and reversibility. The utility model is characterized in that the dual gear speed reducer is only provided with an output axle and an input axle, one dual gear or more than one dual gear is connected to the axles in series, the dual gears are sheathed on the axles by bearings, and the center distance of each pair of gears is equal. The utility model has the purpose that the utility model can be used as the driving devices of various complete machines and is widely applied to machines, metallurgy and mines.

Less tooth difference planet speed-reducer series

Abstract: The present invention provides a series of less teeth difference planet speed reducer which belongs to the technical field of common mechanical transmission. This invention uses the axle sleeve of hydrostatical pin with throttle tail board in the W output mechanism and provides a necessary overlapping interference coefficient Gs for avoiding the teeth-shape interference phenomenon formed by teeth-shape accumulative error in case of high transmission ratio. In addition, a slotted elastic support of high-speed bearing for using to match the high-speed power machine is provided. So that the power transmission equipment possesses single-stage high transmission ratio, high efficiency and high speed of driving shaft.

Laser beam treatment machine tool with working piece hole controlled by micro-computer

Abstract: The utility model relates to a laser beam treatment machine tool with working piece hole controlled by micro-computer, which adopts the structural scheme of not moving on the laser beam, but lifting, rotating and shifting on the working piece. Two sets of step motors are controlled by the micro-computer, a lifting sleeve is raised and dropped and a rotating shaft is rotated which are through a leadscrew, a splined shaft respectively and a worm wheel speed reducer, so the lifting and the rotating of the working piece are realized. The working piece is installed on a sliding table, and the shifting of the sliding table and the working piece is realized through the pneumatic logic control technique, the gas and liquid changing technique and the rotating shaft pneumatic transfering technique. The utility model has the advantages of compact structure, high rigidity and safe operation. Besides the quality of the laser treatment is high, and the laser beam treatment machine tool with working piece hole controlled by micro-computer is suited for the production line in industry.

Peak voltage reducer circuit for fluorescent lamps

Abstract: A rapid start fluorescent system which has its starting capacitance connected to a tap on the secondary of the ballast transformer which tap is located at a predetermined number of turns of the secondary.

Electronic explosion-proof hoisting winch

Abstract: The utility model relates to an electronic explosion-proof hoisting winch. The winch can be used for the fixing winch in wells of oil fields and mines having the explosion and combustion danger, and the utility model is especially suitable for lifting drills and loads on drillers in the oil field. The utility model adopts an explosion-proof cone-shaped motor, and the integral structure is that the explosion-proof cone-shaped motor (1), a roller (2) and a speed reducer (4) are arranged on a same axis. One side of the roller is provided with a rope guiding device (3) which makes the height of the lifted object be increased.

Flexible gear speed reducer

Abstract: PURPOSE: To enable the title speed reducer to be used only by inserting a motor shaft into a hub by providing a face plate between a casing and a motor fitting flange, and by supporting the hub of a bearing unit by a bearing provided between the hub and the face plate so as to set the position in the axial direction. CONSTITUTION: On the inner circumference of a casing 6, the internal teeth 8 of a fixed internal gear 7 are integrally formed. Between the casing 6 and a motor flange 21, a face plate 31 is interposed. The hub 11 having been connected with an elliptical cam 10 is supported by a bearing 32 provided between the face plate 31 and itself so as to set the position in the axial direction. The thrust force acting on the hub 11 is supported by this bearing 32. Thus, users can use the title speed reducer only by inserting a motor shaft into the hub. COPYRIGHT: (C)1989,JPO&Japio

Electric actuator unit

Abstract: PURPOSE:To reduce the occupied spaces and weight and improve the responsiveness and movable range by containing the rotor and stator of a motor in the flex spline of a harmonic drive speed reducer CONSTITUTION:The stator 1, rotor 2 of a motor and a rotor detection control unit 3 for position-controlling the rotor 1 are arranged in spaces other than a wave generator 5 in the flex spline 6 of a harmonic drive speed reducer A fixed shaft 9 and a bearing 10 are likewise arranged, one end of the fixed shaft 9 is fixed to a cover 8, and the cover 8 is fitted to a circular spline 7 Accordingly, the occupied spaces and weight are reduced, and the responsiveness and movable range of a device applying this can be improved

Safety device for passenger conveyor

Abstract: PURPOSE: To increase the workabillty of functional inspection by rotating a rotating plate usually together with an input shaft of a speed reducer so as to detect the traveling speed of a passenger conveyor and, when the functional inspection of a speed detector is made, fixing the rotating plate to the input shaft with bolts so as to enable rotation of the rotating plate as a single body. CONSTITUTION: A rotating plate 4 is fixed to a boss 5 fitted closely onto an input shaft 3 of a speed reducer with bolts 6 and, therefore, it operates as the detector of a speed detector for the input shaft 3 of the speed reducer. Also, when the bolts 6 are removed, the rotating plate 4 is released from the input shaft 3 of the speed reducer and can be rotated as a single body. Then a retaining ring 8 is installed in the ring groove of the input shaft 3 of the speed reducer so that the rotating plate 4 is not come out of the input shaft 3 while the single body is rotating, and a liner 9 is installed between the retaining ring 8 and the rotating plate 4 so that the rotating plate 4 is made in contact with the boss with a proper contact force so as to suppress the rotating plate 4 from swinging while the single body is rotating. Thus the functional inspection of the speed detector can be made by the single body rotational test of the rotating plate 4 so as to increase the workability of the inspection.