Showing papers on "Reducer published in 1987"

Intermittent drive mechanism

Abstract: An intermittent drive mechanism includes a pair of non-circular dirve and driven gears (13, 14) for translating a constant velocity rotary motion of an input shaft (12) into a non-uniform velocity rotary motion of an intermediate shaft (15), the latter-­mentioned rotary motion having a sinusoidal angular speed pattern, and a harmonie speed reducer (17) drivingly connecting the intermediate shaft (15) to an output shaft (16) which is connected to a flexible spline of the speed reducer (17). A rigid circular spline of the speed reducer (17) is angularly reciprocated under the control of an eccentric cam (32) on the input shaft (12) in such a manner that the motion of the sinusoidal angular speed pattern is transmitted from the intermediate shaft (15) to the output shaft (16) in a certain decelerated condition only while the intermediate shaft (15) turns through a half of each turn. The motion transmission takes plane gently without causing undesired shock at the beginning and the end of the motion.

Roll driving apparatus for rolling mills

Abstract: A driving apparatus in which the power of a single electric motor is distributed to two shafts via a neck roller, the power distributed to these shafts being then transmitted to rolls via a speed reducer. Internal planetary gears are used as the speed reducer, so that the transmission of a large torque can be done by small gears.

Polymeric drag reducer performance by injection through a land-length die

Abstract: Drag reduction in fluids flowing through conduits is improved by the injection of high molecular weight fluid soluble drag-reducing polymers through land-length dies having multiple openings.

Dynamic vibration reducer

Abstract: PURPOSE:To facilitate simplification, adjustment and maintenance of a structure by inserting a porous partitioning member soaked in a tank and giving resistance to motion of the inner fluid in a dynamic vibration reducer in which the inner fluid having free surface is stored in the tank and anti rolling is made by sloshing of the inner fluid. CONSTITUTION:A tank 1a is designed to attenuate its motion with viscosity resistance of inner fluid by a mesh type baffle 2a against vibration on the x-z plane and against that on the y-z plane. Thus, by inserting a porous partitioning member, structure simplification, easy adjustment and maintenance can be realized. Therefore, attenuation value and specific vibration number can easily be adjusted and aged deterioration is less as there is no vibration part. And the direction to which the reducer works can be set variously to 1 direction, 2 directions or non direction by changing the shape of the vessel. Further, specific vibration number can set to a desired number by the shape of the tank and its liquid amount.

Shaft aligned backstop for a reducer

Abstract: A backstop for a reducer having a casing comprises a one-way cylindrical clutch having a plurality of circularly arranged locking elements therein engaged by the periphery a reducer input shaft passing axially therethrough. To achieve a precise concentricity of the reducer shaft and the circularly arranged locking elements so that each element is stressed, the clutch is loosely housed in and loosely keyed to a clutch casing which is in turn firmly attached to a portion of the reducer casing and the one-way clutch and circularly arranged locking elements are then bushing aligned concentric with the reducer input shaft extending axially therethrough.

Gas purification system through a filter system, especially applicable to internal combustion engines

Abstract: A gas purification system through a filter system, especially applicable to an internal combustion engine, comprising engine exhaust ducting, an exhaust pipe, an expander on the exhaust pipe between a muffler and the exhaust ducting, a duct connected to the expander for diverting escape gases from the exhaust pipe, a pressure reducer on the duct to suck the gases from the exhaust pipe, a series of filtering parts serially interconnected on the duct between the expander and the pressure reducer to filter the gases, a regulator located between the pressure reducer and the filtering parts, a relay connected to the pressure reducer to start or stop the operation of the pressure reducer, a contactor connected to the engine to detect changes in the engine speed, an electronic circuit connected to both the relay and contactor so as to signal the relay when the contactor detects that the engine is idling or beginning to accelerate, and a delay switch connected to both the relay and electronic circuit so as to momentarily delay the shutoff signal from the electronic circuit to the relay.

Air motor harmonic drive slice lip automation device

Abstract: A compact system for converting a rotational movement, of relatively low torque, into an accurate linear movement, of relatively high force. The system includes a low torque actuator and a backlash-free gear reducer. A linearly movable shaft, capable of exerting a high linear force in either direction, has a long axis in direct line with the long axis of the actuator. A direct linkage, essentially free of backlash, connects the actuator to the shaft through the gear reducer. A body and housing enclose the system.

Dynamic roadway speed reducer for the regulation of road traffic

Abstract: A speed reducer for road vehicles which comprises at least one speed-reducing bar 7 mounted to move at the top, on a support 1 which can be bedded in the roadway in such a position that the bar extends transversely to the direction of travel of the vehicles while being flush with the surface S of the roadway. The speed-reducing bar is also subjected to the action of an operating device 14 capable of raising it or lowering it. This operating device is preferably formed by a wedge 14 which can be displaced in translation in one direction or another over a horizontal supporting plane 16, the upper sloping face 13 of which interacts with a lower sole 11, at the same slope, of the speed-reducing bar 7.

Motor-driven tool

Abstract: PURPOSE: To enable a compact and light motor-driven tool to be used for multi- purposes by providing a speed reducer, capable of being mounted/demounted, in the end portion of a case in which an electric motor is enclosed and providing a tool mounting portion on the output shaft of the speed reducer. CONSTITUTION: An electric motor 2 is enclosed in the case 1 of a motor-driven tool, and the shaft 3 of this electric motor 2 is extended on one side. A coupling 4 is provided on this shaft 3, and a speed reducer 6 provided in the end portion of the case 1 is connected to the shaft 3 of this electric motor 2 through the coupling 4. A reduction ratio is set by exchanging this speed reducer 6 for an optional one so as to set the rotating speed of a tool suitable for machining so that the machining is performed by the tool such as a drill or the like attached to the tool mounting portion 7 of the speed reducer 6. Further, without limiting to rotating tools, an axial reciprocating interlocking mechanism or the like is provided on the speed reducer 6 so as to be able to use the motor- driven tool for multi-purposes. COPYRIGHT: (C)1989,JPO&Japio

Converting rotational movement into linear movement

Abstract: A compact system for converting a rotational movement, of relatively low torque, into an accurate linear movement, of relatively high force. The system includes a low torque actuator (41) and a backlash-free gear reducer (42-46). A linearly movable shaft (55), capable of exerting a high linear force in either direction, has a long axis in direct line with the long axis of the actuator. A direct linkage (51-53), essentially free of backlash, connects the actuator to the shaft through the gear reducer. A body (58) and housing (60) enclose the system.

Optimizing Join Queries in Distributed Database

Abstract: A reduced cover set of the set of full reducer semijoin programs for an acyclic query graph for a distributed database system is given. An algorithm based on this reduced cover set is then presented which determines the minimum cost full reducer program. We show that the computational complexity of finding the optimal full reducer for a single relation is of the same order as that of finding the optimal full reducer for all the relations. The optimization algorithm is able to handle query graphs where more than one attribute is common between the relations. We also present a method for determining the optimum profitable semijoin program. The computational complexities of finding the optimum cost semijoin program is high. We present a low cost algorithm which determines a near optimal profitable semijoin program. We do this by converting a semijoin program into a partial order graph. This graph also allows us to maximize the concurrent processing of the semijoins. It is shown that the minimum response time is given by the largest cost path of the partial order graph. We can use this reducibility as a post optimizer for the SDD-1 query optimization algorithm. Finally, it is shown that the least upper bound on the length of any profitable semijoin program is N*(N−1) for a query graph of N nodes.

Method and device for self defence of vulnerable points of premises or vehicles

Abstract: The invention relates to a method and a device for self defence of vulnerable points of premises or vehicles. The device comprises at least one reservoir of products to be dispersed 10, a source of high-pressure compressed gas 12 linked to the said reservoir by means of at least one valve, for example electropneumatic 18 and by a pressure reducer 14, and a plurality of dispersion nozzles 16 distributed at the periphery of the point or points to be defended and linked by ducting 17 to the said reservoir.

Suspension device for the support legs of a jack-up oil platform

Abstract: The suspension device for the support legs of a jack-up oil platform having a hull movable along the legs includes a driving mechanism having a plurality of output gear pinions cooperating with racks mounted along at least a part of the legs. Each of the output gear pinions is drivable by an electric motor associated with a speed reducer which is pivotally mounted on a structure which is connected to the hull and has at least one bearing which allows a given angular movement of the speed reducer and each corresponding output gear pinion. Each speed reducer cooperates with an energy absorbing mechanism including at least one torsionally elastically yieldable support element connected to a corresponding speed reducer and affording a progressive absorption of shock particularly at the moment when the legs contact the sea floor.

Spring loaded pendulum-type dynamic vibration reducer

Abstract: PURPOSE:To stabilize damping force by providing a damping device between mechanical elements adapted to relatively displace periodically, thereby to absorb kinetic energy. CONSTITUTION:When external force is applied to pendulums in the movable direction, weights 12, 12a are vibrated in the directions of arrows 18, 18a nearly with their natural frequencies (n1). When springs 6, 6a, 6b, 6c are loaded on the pendulums, and external force is similarly applied thereto, the weights are vibrated with their natural frequencies (n2). Accordingly, if the natural frequency (n2) of a dynamic vibration reducer is matched with the natural frequency N of a vibration controlled structure, both the reducer and the structure resonate, and kinetic energy of resonance is converted to thermal energy to stabilize the damping force.

Motor-driven tilt steering device

Abstract: PURPOSE:To make the reverse rotation of a motor unnecessary by pivotally connecting one end of a link to an eccentric shaft performing the crank motion and pivotally connecting the other end to a tilt bracket. CONSTITUTION:A motor 10 is fixed to the side wall of a mounting bracket 1, and an eccentric shaft 13 is provided on the output wheel 12 of its speed reducer 11. One end of a link 14 is pivotally connected to the eccentric shaft 13, and the other end of the link 14 is connected via a pin 15 protruded below a tilt bracket 2 and a long hole 16. The long hole 16 is bent nearly in a dogleg shape to form a slide section 16a and a lock section 16b, and the link 14 can be shifted in the longitudinal direction and the width direction.

Dynamic vibration reducer provided with electric-type variable damping device

Abstract: PURPOSE:To enable a damping value to be set freely by causing a generator to be driven in a rotational motion varied in its vibration amplitude so that the vibrational energy is absorbed by applying load to the generator, and then varying the load applied to or the field current streamed into the generator CONSTITUTION:The relative displacement between a vibrational body 2 and an additional mass 4 is converted into a rotational motion by means of a translation-rotation converter, and moreover, it is accelerated by means of a transmission so as to cause a generator 10 to be operated Hereupon, the kinetic energy is converted into electricity, and the energy is absorbed after it is converted into heat and the like by means of a resistor 12 added to the generator 10 That is, at this point, the damping effect can be adjusted by way of varying the resistance value of the resistor 12 Thereby, the damping factor can easily be changed by way of either varying the acceleration factor by means of a transmission or varying the resistance value of a resistor

Motorised handling roller

Abstract: Motorised handling roller for producing a transport path. It includes an electric motor whose rotor is connected kinematically to a tubular cylinder 1 via a speed reducer (reducing gear). Between the speed reducer (reducing gear) 4 and the tubular cylinder 1 is arranged a friction coupling 17, 18, 19 which can be adjusted from the outside of the roller through an axial passage 21 of the shaft 2. The speed reducer (reducing gear) as well as the motor are thus protected against excessive braking forces or acceleration forces caused by the load transported.

Elastic plastic area tightening screw performance testing device

Abstract: PURPOSE:To test the actions of a bolt nut up to the plastic area with a single testing device by fitting a load cell which can mutually separate and detect the screw surface torque, the bearing surface torque, the tightening torque, the shaft force and the external force on the bolt nut when the tightening screw performance of the bolt nut is tested. CONSTITUTION:When the tightening screw performance to a bolt nut is tested, the bolt nut 1 is sandwiched by up and down load cells 2 and a displacement gauge 3, and to the lower side displacement gauge 3, the pressure is added by a servo motor 4 and speed reducers 5 and 6. Also to the cell 2 at the upper side, the pressure from a hydraulic cylinder 7 through an oil pressure source 8 and a servo valve 9 is applied, and a potentiometer 10 is fitted to the peak part of the cylinder 7 and a tachogenerator 12 is fitted to the servo meter 10. Thus, the output of a rotary encoder 62 to assemble the cell 2 and the speed reducer 6 is applied to a signal input output device 15 which comes to be the calculating processing part, and a floppy disk 18, a control box, etc., are actuated.

Arrangement of an air-conditioning unit in a motor vehicle

Abstract: The air-conditioning unit comprises a heat exchanger 6 and a pressure reducer 7 housed in a casing 8 fixed into the passenger compartment and connected to pipes 17 arranged in the engine compartment. It is characterised in particular in that the partition 3 separating the passenger compartment 1 from the engine compartment 2 comprises an opening 4, the casing 8 is fixed on this partition and comprises an open face 8a, 8b arranged opposite the said opening 4, the pressure reducer 7 projecting through the said open face, the pipes 17 connected to the pressure reducer being held by means of fastening members 26 interacting with a member 21 which is situated in the engine compartment and which blocks off the said opening 4 in a sealed fashion.

Marine propulsion machinery

Abstract: PURPOSE:To ensure the lowest ship speed by means of a fixed pitch propeller and release the restriction of torque at operation on the reduced number of cylinders by providing a variable epicycle reduction gear between a main engine and its propeller in a ship and controlling rotational speed on both the input and output sides of the reducer. CONSTITUTION:A main engine 1 drives a fixed pitch propeller 4 through a variable epicycle reduction gear 2. The output of the main engine 1 is transmitted to the sun gear 5 of the variable planetary gear reducer 2. A planet gear 6 meshing with the sun gear 5 meshes with a ring gear 7. An output taken out of the epicyclic gear 6 at reduced speed drives the fixed pitch propeller 4. A controller 8 is connected to both a rotational detector 9 on the input side of the epicycle reduction gear 2 and a rotational detector 10 on its output side. A driving machine 11 driven by a signal sent out by the controller 8 drives a gear 12 and the ring gear 7 meshing with it to control the number of revolution on the output side of the reducer 2.

Instrument for measuring dust

Abstract: PURPOSE: To prevent sticking of dust in a gas sampling pipe and to make exact measurement by providing a destaticizing device around said pipe. CONSTITUTION: Cleaned air is blown by a blower 12 through an introducing piping 13 and a filter 14 into a material 11 to be measured in a measuring chamber 10. The air including the dust generated from the material 11 is discharged through a bell mouse reducer 15 to a discharge piping 16. Part of the air in the piping 16 is sampled by the sampling pipe 3 and the concn. of the dust is counted by a measuring instrument 2. The destaticizer 4 is provided around the sampling pipe 3 so that the static electricity in the sampling pipe is removed. Then, the dust is no longer stuck to the inside of the pipe and the measurement is exactly carried out. COPYRIGHT: (C)1988,JPO&Japio

Paper feeder of facsimile equipment

Abstract: PURPOSE:To reduce considerably a width in dimension by forming a motor and a reducer in one body and arranging the reducer outside right- and left-hand side plates comprising a mechanism part and the motor between both side plates. CONSTITUTION:On the side plate 3 a notch part 18 is formed, and so constituted that the unit of the motor 2 with the integrally constructed reducer 1 can be easily attached and detached on the side plate 3. The motor 2 which is made to a unit formed integrally with the reducer 1 can be easily attached to the side plate 3 erected on the bottom plate 4 of the main mechanism part of a facsimile equipment, and the reducer 1 is positioned outside the side plate 3. Output spindles 6 and 7 transmit drive force to drive rollers.

Suspension device for supporting the legs of a self-lifting oil platform

Abstract: not available for EP0271377Abstract of corresponding document: US4880336The suspension device for the support legs of a jack-up oil platform having a hull movable along the legs includes a driving mechanism having a plurality of output gear pinions cooperating with racks mounted along at least a part of the legs. Each of the output gear pinions is drivable by an electric motor associated with a speed reducer which is pivotally mounted on a structure which is connected to the hull and has at least one bearing which allows a given angular movement of the speed reducer and each corresponding output gear pinion. Each speed reducer cooperates with an energy absorbing mechanism including at least one torsionally elastically yieldable support element connected to a corresponding speed reducer and affording a progressive absorption of shock particularly at the moment when the legs contact the sea floor.

Portable and autonomous laser emitter

Abstract: Laser comprising a source emitting laser radiation, a beam- divergence reducer, an optical sight, and a portable, temporarily switchable power supply. This device essentially comprises a cylindrically shaped intermediate stand 2 containing a laser emitter 3 in an elongate housing 15, and extended by a beam-divergence reducer 1. An optical telescope sight 5 is fixed onto the stand 2 with an adjustable fixing 4. The assembly of these elements is mechanically fixed onto the stock 7. An electrically cabled power supply 6, 14, 20 is provided from a bag 9 containing an electrical accumulator 10, an electric power supply 11, and a current amplifier 12. The bedding is provided by synthetic foam 16. A switch 8 is mounted on the stock, the wires being dismountably connected by connections 13, 23. Application to remote control, lighting and various dazzle systems.

Electric winding device for flexible water pipes for removing dust

Abstract: The utility model relates to an electric winding device for flexible water delivering pipes for removing dust, which can be used on various bulk material loading-unloading machines. The device is designed according to the characteristics of a torque motor and is mainly composed of an electric torque motor, a brake wheel coupling, a speed reducer, a transmission mechanism, a hollow shaft, a winding disk, rotary joints, water delivery hoses, etc. The winding disk of the water delivery hose is driven by the torque motor through the transmission mechanism. The utility model has the advantages of simple structure, reliable running, long service life, wide application range, etc., and the received force of the water delivery hose is small.

Power-driven rice transplanter

Abstract: The utility model discloses a power driven rice transplanter, comprising an assembly of a traction rod with double handles (1), a supporting bracket (2), a machine frame of a boat bottom and a box moving mechanism assembly (3), a division plugging mechanism assembly (4), a connecting rod assembly (5), a crank (6), a speed reducer (7) with a clutch and an engine (8) and other components. The power is transmitted to the speed reducer (7) by the engine (8). The speed reducer (7) drives the division plugging mechanism assembly (4) to conduct vertical wobbling and push-and-pull movement by the crank (6) and the connecting rod assembly (5) to complete the rice transplanting motion. The operator only needs to pull the handle of the traction rod and forward drags according to the required plant space to complete the rice transplanting motion.

Teaching device for robot for automatic seam welding

Abstract: PURPOSE:To perform the teaching with light force and yet at slower speed by linking the speed reducer at the output side of a robot with each encoder via the speed reducer for model and by arranging the arithmetic unit for the speed of a driving source as well. CONSTITUTION:The welding zone of a work W is fed into the rolls 1021, 1022 for teaching simultaneously with their rotations at the lower speed than that of the robot actual working time by holding the work W by a robot model 9. The positional signal transmitted from the encoder 1201-1204 of each axis is sampled on each sampling period of a sampling period transmitter 123 and stored in a memory 127. The sampled positional data are made the control data of the robot by performing various operations and by calculating each arm speed at the robot actual working time. The teaching at slower speed is thus enabled.

Differential gear self-locking planetary reductor

Abstract: The utility model discloses a differential gear self-locking planetary reductor, which bases on the reducing theory of planetary gears Standard planetary gears are engaged with sun wheels and supporting wheels on the same divided circle through the positive and negative changing position of the sun wheel and the supporting wheel, which can realize self-locking of reversing stroke The number of the planetary wheel of the reductor can exceed the number of teeth difference of sun wheels and supporting wheels The utility model has the advantages of small size and high efficiency The reducer can be used for self-locking reducing mechanisms of cranes, electric hoists, manual hoists and places needing self-locking reducing mechanisms