Showing papers on "Reducer published in 2007"

Theoretical and Experimental Analysis of a Cycloidal Speed Reducer

Abstract: Compared with common speed reducers, the cycloidal ones (also known as cycloid drives) cover a wider range of transmission ratios, have a higher load-carrying capacity, are smaller, exhibit a smoother running and a good efficiency. These characteristics make them attractive for industrial applications, especially for robotics applications, machine tools and linear axis positioning in assembly machinery. In this paper, a theoretical and experimental investigation on an innovative cycloidal speed reducer will be presented. The typical cycloid drive has a planet wheel, the profile of which is the inner offset of an epitrochoid, meshing with cylindrical rollers connected to the case. This reducer, on the contrary, has an external ring gear, the transverse profile of which is the external offset of an epitrochoid, and engages with the planet wheel by means of cylindrical rollers. This paper will investigate the structural characteristics and the kinematical principles of this type of reducer. A theoretical approach based on the envelope theory (following Litvin’s approach) will be developed and compared with a development of Blanche and Yang’s approach. Furthermore, a simplified procedure to calculate force distribution on cycloid drive elements, as well as its power losses and theoretical mechanical efficiency will be presented. The effects of design parameters on the values of the forces will be studied, for an optimal design of this type of reducer. The theoretical model will be then tuned using the results of tests on a specific rig. As a result of the experimental tests, the reducer mechanical efficiency dependency on speed and torque will be described. The aim of this work is to perform the fine tuning of a theoretical model in order to predict the operating behavior of the cycloid drive, and to improve its design procedure.Copyright © 2007 by ASME

Geometric Design Using Hypotrochoid and Nonundercutting Conditions for an Internal Cycloidal Gear

Abstract: This paper uses the theory of gearing to derive the mathematical model of an internal cycloidal gear with tooth difference. Whereas the outer rotor profile is based on a curve equidistant to a hypotrochoidal (or extended hypocycloid) curve, the inner rotor design generally depends upon type of use-e.g., when used as a speed reducer, it is a pin wheel. Therefore, this analysis proposes designs for both a gerotor and a speed reducer. Specifically, for an inner rotor used as a gerotor pump, it outlines a mathematical model to improve pump efficiency and derives a dimensionless equation of nonundercutting. For the speed reducer, it develops and demonstrates with numerical examples, a feasible design region without undercutting on the tooth profile or interference between the adjacent pins.

Offset drive system for utility vehicles

Abstract: A wheel driven utility vehicle includes a frame and two small volume high speed alternating current electric motors arranged side by side for driving the vehicle. Alternatively high speed direct current, hydraulic or pneumatic direct current motors may be used with suitable controls. Each motor has an output shaft which drives an offset planetary gear reducer. Each offset planetary gear reducer is affixed to the electric motor and includes an output carrier interconnected with an output shaft. Each output shaft includes first and second chain drive sprockets which drive chains interconnected with shafts driving the front and rear wheels respectively. Each offset planetary gear reducer enables use of space saving high speed relatively low-torque alternating current electric motors with attendant large speed reductions. Gear reduction enables the production of sufficient torque at the wheels of the vehicle. Applications in addition to utility vehicles are also specifically contemplated.

Wheel drive device

Abstract: PROBLEM TO BE SOLVED: To set a connection part of a lower arm and a wheel support member to the optimum position and to prevent interference of the connection part with a speed reducer in a wheel drive device. SOLUTION: The wheel 11 is drivably constituted by decelerating rotation force of a motor 31 arranged in the wheel 12 by a plurality of speed reducers 32, 33 and transmitting it to the wheel 12. The motor 31 and the respective speed reducers 32, 33 are stored in a housing 26, and a lower ball joint 62 for connecting the lower arm 61 and the knuckle arm 29 is arranged so as to be opposed to a radial direction of the first speed reducer 32 and the wheel 12. A housing body 27 and an outer peripheral part of a ring gear 41 of the first speed reducer 32 are connected by a spline 45, and tooth lack parts 27c, 41b are formed at positions opposed to the lower ball joint 62 in the circumferential direction of the spline 45. COPYRIGHT: (C)2009,JPO&INPIT

Break-away multi-purpose flooring transition

Abstract: The invention is a joint cover assembly for covering a gap adjacent an edge of a panel that covers a sub-surface, and a method of covering such a gap. The assembly can be manipulated to form an end molding, a T-molding, a hard surface reducer, a carpet reducer, and/or a stair nose molding.

Multi-functional tool assembly for processing tool of material processing machine

Abstract: A multi-functional tool assembly for a material processing machine includes a single tool including a head and a shaft integrally formed therein. The head has a cavity with an arcuate surface. The multi-functional tool assembly also includes a material reducer adapted to reduce material within the waste processing machine. The material reducer is disposed in the cavity and has an arcuate surface complementary to the arcuate surface of the cavity.

Three-cylinder plunger pump with worm wheel and worm reducer for oil well operation

Abstract: The utility model relates to an oil well used three-cylinder piston pump with a worm and gear wheel reducer which solves the problems of that the gear pair reducer of the prior art has small deceleration ratio, can not transmit large torsions, thus the discharging pressure and the discharging power of the pump is restricted, which causes the application range is narrow In order to solve the problem, the technical key points adopted by the utility model are that the reducer is the worm and gear reducer; a pump valve box is fission-type; a suction valve and a discharging valve are integrated in the pump valve box The utility model can be applied to the oil well operation, has the outstanding advantages of that the discharging pressure and the discharging power are reinforced, the application range is widened, the weight is light, the disassembly and assembly are simple, etc, and is especially suitable for the field oil well operation and the seal platform oil well operation

Exhaust emission control device

Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device provided with a mechanism for preventing accumulation of deposition urea in a breather of a reducer tank. SOLUTION: In the exhaust emission control device having the reducer tank 1 storing liquid reducer provided with the breather 8 opening an inside of the reducer tank to atmosphere includes a blowing pipe 10 branching off of a tank connection part 8a of the breather 8, an air tank 11 feeding air to the blowing pipe 10, and is provided with a breather cleaning device blowing air into the reducer tank 1 from the blowing pipe 10 through the tank connection part 8a of the breather 8. COPYRIGHT: (C)2008,JPO&INPIT

Power-driven wheel for a military vehicle

Abstract: There is described a power-driven wheel for a military vehicle, having an axial-flow electric motor, and a hub connected functionally to the motor and rotating about an axis; the motor has an output member housed inside the hub; and the wheel has an epicyclic reducer interposed functionally between the hub and the output member.

In-wheel motor drive

Abstract: PROBLEM TO BE SOLVED: To provide an in-wheel motor drive, in which an overload state of an in-wheel motor unit including a motor and a reducer is simply determined, a vehicle is driven with the in-wheel motor unit in the optimum state, and reliability of the motor and the reducer are secured. SOLUTION: The in-wheel motor drive comprises a bearing A for a wheel, the motor B, the reducer C provided between the motor B and the bearing A for a wheel, and a controller 51 to control driving of the motor B. A temperature sensor 56 is provided to measure the temperature of the in-wheel motor unit U comprising the bearing A for a wheel, the motor B, and the reducer C. A temperature-respondent motor control means 57 is provided to limit drive current to the motor B, or decrease the motor rotation number in accordance with temperature information measured by the temperature sensor. Vibration detection may be applied for control instead of temperature detection. COPYRIGHT: (C)2008,JPO&INPIT

Hydrate inhibited latex flow improver

Abstract: A system for reducing pressure drop associated with turbulent fluid flow through subsea conduits. Such reduction in pressure drop is accomplished by transporting a hydrate inhibited drag reducer through a long conduit of small diameter, and thereafter injecting the drag reducer into a host fluid at the subsea location, to make a treated fluid. The treated fluid is then extracted from the subsea location via a production/transportation conduit. The presence of the drag reducer in the treated fluid reduces pressure drop associated with flow through the production/transportation conduit.

A gas pressure reducer, and an energy generation and management system including a gas pressure reducer

Abstract: A gas pressure reducer comprising at least one gas expansion device (4,1) for allowing the gas to expand and thereby reduce in pressure, and at least one means (20,22,24,34) for raising the temperature of the gas in the vicinity of the gas expansion device and wherein the means for raising the temperature of the gas comprises a liquid or solid fuel heater or a liquid fuelled engine (34).

Mini micro-acoustic wall-climbing robot based on vacuum adsorption principle

Abstract: The invention relates to a small scale micro sound wall climbing robot based on vacuum absorption principle, comprising the vacuum generator installed on the displacement structure, and the sucker on the displacement structure, the said vacuum generator composed of drive generator single post plug pump and the film pump connected with it, and the two position three way valve. The said displacement structure is six leg walking structure, with each leg's drive joint made of the generator, harmonic decelerator installed at both ends of the generator and the planetary reducer connected to it and they are forming into a module with the umbrella gear connected to the planetary reducer, with both ends of the module linked with the passive pole through the joint with the machine, the sucker installed on the passive pole through the passive joint and connected to the two position three way valves. It is small in size, low in noise, free from cables. It has extensive applications.

DIAGNOSTIC METHOD AND DIAGNOSTIC DEVICE IN NOx CLEANING DEVICE

Abstract: PROBLEM TO BE SOLVED: To provide a NOx cleaning device for cleaning NOx by selectively adding urea water or ammonia as a reducer to a selective reduction NOx catalyst contained in an exhaust passage of an internal combustion engine, wherein the deterioration of the selective reduction NOx catalyst itself is diagnosed from a vehicle-mounted state or the like. SOLUTION: The diagnostic method is composed of a step for determining whether or not the temperature of an NOx catalyst 44 is a temperature in a prescribed temperature region which is lower than a NOx cleaning temperature region and is included in an ammonia adsorbing temperature region, a step for adding a reducer until ammonia leaks to an exhaust passage on the NOx catalyst 44 downstream side when it is determined affirmative in the determining step, and a step for determining that the NOx catalyst 44 is deteriorated when an actual addition amount or a value equivalent thereto as a total amount of the reducer added to the NOx catalyst 44 by the step for adding a reducer is not higher than a threshold γ1 for the determination of the deterioration of the NOx catalyst 44. COPYRIGHT: (C)2009,JPO&INPIT

Lifting self-swinging type cleaning machine

Abstract: The utility model relates to a self-swinging cleaning machine with automatic elevation function. It includes a motor, a pin cycloid reducer, a rotating shaft, a roller, and several cleaning brushes arranged around the roller. The pin cycloid reducer is arranged on the support frame. A elevation screw is connected with an elevation worm gear reducer unit and the elevation screw is arranged on the track. Up/down stop switches are arranged at the two ends of the screw and the switches are connected with the motor switch. The screw is equipped with a platform which has a shaft. A movable seating is arranged on the screw and the seating is connected with the support frame. The platform is also equipped with a skid positioner and it is connected with the support frame, too. The utility model is easy to install and operate. It can not only rise or fall, but also has electric self lock function. More importantly, it can swing automatically and make sure that the surface beside the water trough outlet as well as the bottom is cleaned.

Method of operating an internal combustion engine arrangement

Abstract: A method is provided for operating an internal combustion engine arrangement and to an internal combustion engine arrangement, which includes, but is not limited to an internal combustion engine, which can be operated with gaseous fuel, a pressure reducer for reducing the gas pressure of the gaseous fuel, which is fed to the internal combustion engine. The pressure reducer is connected on the high-pressure side in a fluid-conducting manner via a gaseous fuel line to at least one gas tank for storing gaseous fuel, and the pressure reducer is connected on the low-pressure side in a fluid-conducting manner by means of a gaseous fuel line to at least one controllable gas injection valve for regulating the gas flow of the gaseous fuel, which is fed to the internal combustion engine, a controllable high-pressure shutoff valve, which is arranged on the high-pressure side of the pressure reducer and is connected in a fluid-conducting manner to the pressure reducer, for shutting off the gas flow of the gaseous fuel which is fed to the pressure reducer from the gas tank. The high-pressure shutoff valve includes, but is not limited to a pilot valve with a relatively small opening cross-sectional area and a main valve with a relatively large opening cross-sectional area, and an electronic control device which is used at least for controlling the high-pressure shutoff valve and the at least one gas injection valve. In order to assume operation of the internal combustion engine with gaseous fuel, controlled by the electronic control device, the pilot valve of the high-pressure shutoff valve is opened in chronological order before the at least one gas injection valve.

Glass lining reaction tank speed reduction machine frame

Abstract: The utility model relates to a glass lining reaction tank speed reduction machine frame which comprises a machine frame and a transmission shaft; wherein the top of the transmission shaft is connected with a shaft coupling, the shaft coupling is connected with a speed reducer and the lower end of the transmission shaft is connected with an agitation shaft of the glass lining reaction tank. The utility model is characterized in that a bearing box is mounted in the machine frame, the transmission shaft penetrates the bearing box and is mounted in the bearing box by an upper bearing and a lower bearing, and upper bearing, the lower bearing and the transmission shaft between the upper bearing and the lower bearing are the same in diameter. A shaft sleeve may be added between the upper bearing and the lower bearing and is not necessary. The utility model needs not to cut grooves in the transmission shaft, is simple to process, improves the torsion strength of the transmission shaft, saves the shaft sleeve, saves the material and reduces the production cost. The disassembling and the installation are simple and convenient. The bearing box seat is flat to make the production easy and simple.

Electric medicine masher

Abstract: The utility model relates to an electric medicine pounder, which is characterized in that the pounder is provided with a bottom plate and a collateral plate arranged on the bottom plate. A motor and a reducer which is connected with the output shaft of the motor are fixed on the collateral plate; the output shaft of the reducer is provided with a cam. The collateral plate is articulated provided with a cantilever bar having a bearing, and an outer orb is connected with the cam. The front end of the cantilever bar is provided with a medicine pounding hammer to which an iron pot corresponding is arranged on the bottom plate. The utility model has the advantages of fast pounding, alleviating labor intensity of staff, saving pounding time, being convenient and practical, and high efficiency, compared with the prior art.

Wave gear sspeed reducer and variable transmission ratio steering device

Abstract: PROBLEM TO BE SOLVED: To provide a wave gear speed reducer capable of further reducing vibration and a variable transmission ratio steering device using the same. SOLUTION: In this wave gear speed reducer, a flexible external gear 33 is partially meshed with a rigid internal gear 32 and a sub rigid internal gear 31, and the meshed position of these gears is circumferentially moved by rotating a wave generator to differentiate the rigid internal gear from the sub rigid internal gear. The inner surface of the rigid internal gear including the ridge line of the addendum 31T and the inner surface of the sub rigid internal gear including the ridge line of the addendum 31T are formed in conical surfaces symmetrically reduced or increased in diameter. The outer surface of the flexible external gear including the ridge line of the addendum 33T is formed in an elliptic cylindrical surface parallel to the axial direction. The flexible external gear is so elastically deformed so that the elliptic cylindrical surface is tilted along the conical surface at the meshed portions of the flexible external gear with the rigid internal gear and the sub rigid internal gear. COPYRIGHT: (C)2009,JPO&INPIT

Fluid jet water mixer

Abstract: The utility model discloses a fluidic water mixer applied in the heating system, which can adjust the water temperature of the water supply system The utility model comprises a water supplying and pressure increasing reducer connecting pipe sleeved on the constant diameter connecting pipe, a pressure expanding pipe and a water mixing pipe forming an integer with the constant diameter connecting pipe; wherein, the brim of the water mixing pipe is provided with a water outputting flange, the constant diameter connecting pipe is communicated with an induction tunnel of negative pressure, thereby forming a three way structure, the front end of the water supplying and pressure increasing reducer connecting pipe is provided with a cone without any contact with the water supplying and pressure increasing reducer connecting pipe, the cone is provided with three liquid guiding board, the other end of the liquid guiding board is fixed on the inner wall of the pressure expanding pipe, the big diameter end of the cone is fixedly provided with a turbine spindle which is provided with a churning turbine, and the liquid guiding board is a burble type curved surface The utility model can self regulate the temperature of the input water according to weather outside, improve efficiency of the boiler, economize fuel and decrease difference in temperature of the backwater of the system water supply

Pipe-pulling device

Abstract: A whole drawn tube device comprises a connecting rod, a pin, a rocker, a resilient roller, an electric motor, a cycloid speed reducer, an electric motor seat, a sheath, a crank and a support. The electric motor and the cycloid speed reducer are horizontally connected into one entity by bolt, while the output shaft of the electric motor is connected with the gear in the cycloid speed reducer by key; the output shaft of the cycloid speed reducer is connected with the sheath by key. The cycloid speed reducer is fixed on the electric motor seat by bolt, and the sheath is welded with the crank and the other end of the crank is connected with the connecting rod and the other corresponding crank by pin and the other end of the other crank is connected with the support by pin and the support is fastened with the foundation; and the other end of the connecting rod is connected with the hooking part of the rocker by pin, and the lower part of the rocker is connected with the support of the resilient roller by pin. The utility model adopts the working principle of crank and rocker organ so as to realize the goal of turning the heavy drill pipe and solve the problems that the air cylinder is frozen in winter to impact its use and air tube line is aging to result in air leakage and waste of human resources and huge laboring intensity toward the employees when the air cylinder was formerly applied and the drill pipe was rolled by manpower.

Patient Support Apparatus Having A Brake/Steer Mechanism With A Foot Pedal Gear Reducer

Abstract: A patient support apparatus includes a brake mechanism and a steer mechanism operated by a foot pedal. A gear reducer is coupled to the foot pedal. The gear reducer reduces the amount that the foot pedal is depressed to operate the brake mechanism and steer mechanism.

Automatically-tracking focus static solar cooker

Abstract: A novel automatic tracking focus still solar cooker is provided The utility model is characterized in that the longitude tracking is designed to be a transmission rotation style that a turntable is meshed with a motor reducer output gear or a chain wheel, the latitude tracking is designed to be a transmission rotation style that a fixed half gear outside a turning parabola curved photospot plate is meshed with a motor reducer output gear, a latitude center line of a rotating support and a flat placing photospot focus of the turning parabola curved photospot plate are on the same level namely the turning parabola curved photospot plate is pivot by the level of the focus, a collector of the solar cooker is impendinly fixed on the flat placing photospot focus of the turning parabola curved photospot plate through another set of frame-shaped plate, only a turn plate and the photospot plate track the system rotation The utility model realizes the complete separation of the collector and the photospot plate greatly reduces the driving power of the tracking motor, is perfect solar- powered tracking photospot utilization equipment

Supporting platform for dismounting automobile engine

Abstract: Disclosed is a supporting platform for dismounting the vehicle engine, which is designed for solving the problem of that the current maintenance of engines on the ground is inconvenient and laborious The utility model comprises a rack, which is characterized in that the rack is arranged with an elevating gear and an elevating guide post transversely, and a supporting working table is connected at the upper end of the elevating gear and the elevating guide post; the rack is vertically arranged with a worm gear-worm speed reducer, the worm shaft is provided with a handwheel, the worm gear shaft is arranged fixedly with a manipulator of the engine When rotating the handwheel, the engine fixed on the manipulator can rotate at all angles randomly along with the handwheel, therefore all the parts on the engine can be easily mended or split and assembled

Hybrid drive system in type of multiple series connection stepless speed change

Abstract: A drive system with mixed power and stepless speed variation is composed of engine with crankshaft output, the first and the second motors and their high-voltage circuits and drive controller, clutch, drive shaft, differential speed reducer, the first and the second semi-shafts, energy accumulator, and the high-voltage circuit for the energy accumulator.

Exhaust emission control device and mixer unit of internal combustion engine

Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device and a mixer unit in which a reducer is efficiently mixed and diffused in exhaust gas, and the distribution of the spray of the passing reducer is brought into a steady state, and the reducer is allowed to flow to the inlet of a reduction catalyst. SOLUTION: This exhaust emission control device of an internal combustion engine comprises the reduction catalyst disposed in the exhaust passage of the internal combustion engine, and a reducer injection part for injecting the reducer in the exhaust passage on the upstream side of the reduction catalyst. This mixer unit for mixing and diffusing the reducer and the exhaust gas is disposed on the upstream side of the reduction catalyst and the downstream side of the injection position of a reducer injection part. The mixer unit comprises a mixer body part formed by arranging a plurality of wire meshes in the flowing direction of the exhaust gas and a diffusing member attached to the reduction catalyst side of the mixer body part. COPYRIGHT: (C)2009,JPO&INPIT

Motor equipped with reducer and method of manufacturing the same

Abstract: A motor equipped with a reducer includes a motor section, and a reducer section assembled to the motor section. The motor section has a first bearing provided at the center of a bottom portion of a closed-bottomed tubular casing, a second bearing provided at the center of an end bell fitted to an opening portion of the casing, and a rotating shaft which is supported by the first bearing and the second bearing and extends outward from the motor section in such a manner that a distal end of the rotating shaft is rotatably supported by a third bearing provided within the reducer section. The motor equipped with a reducer further includes a fourth bearing adapted to support the rotating shaft and provided within the reducer section, and a bearing holder for fixedly holding the fourth bearing between the bearing holder and a stopper portion provided on the gear box.

Internal gear ring outputting planetary speed reducer

Abstract: The invention mainly includes an input gear shaft, 2-8 straight-toothed or helical driven gears, 2-8 offset crankshafts firm-jointed with the driven gears, an annular gear, 1-4 annular plates, a disc support, an output shaft, two end caps and a box Because of outputting power through a output mechanism made up of the annular gear and the output shaft, the invention has large transmission ratio and high operating efficiency

Eccentric oscillating type speed reducer and apparatus for rotating stabilizer shaft using the eccentric oscillating type speed reducer

Abstract: The present invention reduces the manufacturing cost of an eccentric oscillating type speed reducer 11 while preventing the torque transmitting capability of the eccentric oscillating type speed reducer 11 from being degraded. A part of a case 12 , which is in a meshing region 50 in which internal teeth of the case 12 mesh with external teeth of pinions 20 , is enabled to bend in a direction in which the radius of curvature thereof decreases. Thus, even when the concentration of a meshing load on the vicinity of a part, at which the manner of meshing between the internal teeth and the external teeth most differs from an ideal manner in the meshing region 50 , a part of the case 12 , which is in the vicinity of the part, bends in a direction in which the radius of curvature decreases. Consequently, the meshing load can be uniformized by being dispersed in the circumferential direction of the case 12.