WO1999000317A1 - Poulie motrice a vitesse infiniment variable pour convoyeur a moteur c.c. sans balais - Google Patents

Poulie motrice a vitesse infiniment variable pour convoyeur a moteur c.c. sans balais Download PDF

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Publication number
WO1999000317A1
WO1999000317A1 PCT/US1998/012730 US9812730W WO9900317A1 WO 1999000317 A1 WO1999000317 A1 WO 1999000317A1 US 9812730 W US9812730 W US 9812730W WO 9900317 A1 WO9900317 A1 WO 9900317A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
shaft
drum
end cap
pulley
Prior art date
Application number
PCT/US1998/012730
Other languages
English (en)
Inventor
Frederick H. Thimmel
David Roessler
Robert Simons
Original Assignee
Bryant Products, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bryant Products, Inc. filed Critical Bryant Products, Inc.
Priority to AU81521/98A priority Critical patent/AU8152198A/en
Publication of WO1999000317A1 publication Critical patent/WO1999000317A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys
    • H02K7/1012—Machine arranged inside the pulley
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
    • B65G23/02—Belt- or chain-engaging elements
    • B65G23/04—Drums, rollers, or wheels
    • B65G23/08—Drums, rollers, or wheels with self-contained driving mechanisms, e.g. motors and associated gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear

Definitions

  • the present invention relates in general to the field of conveyor systems. More particularly, the present invention relates to systems having direct current (DC) brushless motorized pulleys.
  • DC direct current
  • Motorized conveyor pulleys have been used for several decades. For example, motorized pulleys are used to drive the belt or chains in conveyor systems and take the place of a separate drive motor, reduction gear box sheaves and drive belts or sprockets and chains. Motorized pulleys are usually used at the head of a conveyor and generally offer an electric drive motor and reduction gearing encased within the outer drum ofthe conveyor pulley.
  • AC motor alternating current
  • belt pull speed/torque
  • AC motorized drives There are several problems with AC motorized drives.
  • RPMs revolutions per minute
  • AC motor remain primarily of a single speed design with speeds changed by gearing.
  • These design limitations require the users to make many permanent choices with little flexibility for change if the unit is installed and the speed or torque is found to be deficient. From a manufacturing standpoint, the many choices reduce economies of scale and add to lead times since units cannot be pre-built. From a distribution standpoint, the varied choices of AC motors require a highly trained sales force which limits the ability to train and bring on line wide channels of distributors and sales agents.
  • AC drives run very hot making them impractical and dangerous for some applications.
  • United States Patent 4,365,187 discloses a brushless direct current motor with a permanent magnet rotor which employs a Hall switch to effect commutation.
  • United States Patent 5,088,596 discloses a motorized conveyor roller in which the motor and drive gear is contained inside the roller.
  • the conveyor roller is hollow and contains a motor which drives a drive member through a gear reducer assembly.
  • the periphery ofthe drive member is frictionally connected to the conveyor roller.
  • a preferred embodiment disclosed in this patent uses a conventional brush commutation DC motor.
  • the use of rare earth magnets on the rotor ofthe DC motor is not disclosed in this patent.
  • United States Patent 5,145,169 discloses a conveyor pulley having a motor contained therein where a rotor rotates about a stator in order to drive the cylinder body.
  • a variable reluctance-type stepping motor is disclosed in the preferred embodiment.
  • United States Patent 4,987,333 discloses a flat type brushless motor and pulley assembly which includes a flat stator having a cutout section formed therein. The stator works with a flat rotor which has multiple permanent magnets for rotating a pulley member.
  • United States Patent 5,228,558 discloses an accumulating conveyor which includes a drive roller having a DC motor and a gear assembly.
  • United States Patent 5,086,904 discloses a "parts supply arrangement" which involves two separate and interchangeable stationary portions of a brushless DC linear motor, and a carrier device on which parts are placed for transportation by attaching them to the moveable portion of the motor.
  • the parts supplying system disclosed in this patent is capable of automatically supplying parts to part mounting machines.
  • the present invention has an infinitely variable speed design that matches the maximum horsepower and torque values for generally any offering within a drum size, giving it a "one size fits all" approach for optimum marketing and mass distribution needs.
  • the speed ofthe pulley drum is selected by the user using the controller. Maximum torque remains constant at any speed setting assuring adequate conveyor belt pull.
  • One pu ⁇ ose ofthe DC brushless motorized conveyor pulley is to offer an infinitely variable speed conveyor system, running at constant high torque levels that confronts the user with less choices, makes the training of sales personnel easier and therefore opens markets through a broad distribution network and makes the use of such a device more attractive to users who have avoided installing motorized pulleys in the past.
  • a primary object ofthe invention is to provide a brushless DC motorized drum conveyor pulley that has infinitely variable speeds, has a soft start, stop, and restarts and is reversible. Another object ofthe invention is to provide an apparatus that is ruggedized and reliable, thereby decreasing down time and operating costs. Another object ofthe invention is to provide an apparatus that has one or more ofthe characteristics discussed above, but which is relatively simple to manufacture, assemble using a minimum of equipment, and use.
  • Another object ofthe invention is to provide an apparatus that has one or more ofthe characteristics discussed above but which is relatively simple to setup and operate using relatively low skilled workers.
  • Another object ofthe invention is to provide a motorized drum pulley that offers significantly greater control options for conveyor systems such as reversibility, dynamically changeable speed control, synchronization between a series of conveyors within a system, and the ability to pause, stop, start or incrementally advance a belt.
  • an apparatus comprising a motorized conveyor pulley which utilizes a brushless, DC motor.
  • rotary motion in the conveyor pulley is generated by a motor core which may comprise a series of NEO rare earth magnets or magnets of another material bonded to a fixed center shaft which rotates within the motor housing having a stationary motor winding.
  • the field ofthe motor winding may be advanced or commutated by the solid state Hall effect ring which is bonded to one face ofthe motor winding.
  • the brushless DC Motor may also use a mechanically rigid, continuous center through shaft.
  • It is yet another object to provide a conveyor that: avoids the use of brush commutation which requires periodic replacement ofthe brushes and turning ofthe split ring commutators, offers low cost, generally infinitely variable speed using an inexpensive DC controller and speed control as the standard control, offers generally flat torque values over a wide range of RPMs making variable speed practical, generally offers higher energy efficiency than AC counte ⁇ arts because of lower current draw, offers generally greater thermal efficiency and lower temperatures because a DC motor runs cooler than an AC motor and heat dissipation is accomplished more easily because the DC motor is generally smaller, and provides feedback as to armature position within the motor and RPM as a function design.
  • This design virtually eliminates offset shaft and cantilevered loads as found in conventional and current designs. This in turn eliminates moment loading of bearings and gears, reduces the number of moving parts, evenly distributes loads through the device, and more fully supports even load distribution to the rotating drum via cycloidal or planetary gears.
  • Another object is to provide the ability to synchronize the speeds of a series of conveyors using a motorized conveyor pulley or one conveyor using several ofthe motorized conveyor pulleys. Another object is to provide a system that through internal feedback can maintain constant speed ofthe system under varying loads, provide for soft starts and stops, stop-restart, dwell, jogging and the ability to incrementally advance the pulley, and provide the conveyor with a preset incremental length. Yet another object is to provide the ability to easily control the motorized conveyor pulley with a PC, digital front end or PLC.
  • FIG. 1 illustrates a generally schematic side elevational view of a conveyor system ofthe present invention
  • FIG. 1A illustrates a generally schematic side elevational view of a plurality of conveyor systems according to the present invention
  • FIG. 2 illustrates a longitudinal section view taken through the line 2-2 of FIG. 1 ;
  • FIG. 2A is an exploded view of one end of another embodiment ofthe present invention.
  • FIG. 3 illustrates a section view taken through the line 3-3 of FIG. 2;
  • FIG. 4 illustrates a section view taken through the line 4-4 of FIG. 2;.
  • FIG. 5 illustrates a front elevational view of one embodiment ofthe gearing assembly of the present invention
  • FIG. 6 illustrates a front elevational view of another embodiment ofthe gearing assembly ofthe present invention.
  • FIG. 7 is a graph showing the torque graphed as a function of speed in terms of RPMs and of amperage for the pulley motor ofthe present invention.
  • outer end plates are fixed to the pulley drum via bolts, threaded pins, welding or a press fit. Either O-rings or a liquid sealant are used to seal this surface.
  • a mechanically fixed assembly rotates about a fixed center through shaft assembly and is comprised of a series of mechanically joined, non-rotating elements (gear end end cap and first stationary shaft, three gear pins, motor end cap, motor housing and drive end cap and second stationary shaft).
  • Shaft sealing that is sealing the interior ofthe device against outside contamination, may be accomplished by an outer stamped metal bearing seal over a washer style plastic seal that fits over a shaft seal that is contained within a machined recess in the outer casing. Washdown duty seals and labrynith seals are also contemplated. Both stationary shafts may be clamped to the conveyor bed by means of a take-up or other device.
  • Rotary motion is generated by the motor core.
  • This is comprised of a series of NEO rare earth magnets bonded and fixed to a center shaft.
  • the motor core's rotating motion is contained by two radial bearings. Both bearings preferably press fit into two elements ofthe non-rotating through shaft assembly - one into the motor end cap and the other into the drive end cap and stationary shaft.
  • the motor core is rotated by the electrical field ofthe motor winding.
  • the field is advanced or commutated in the motor winding by a Hall effect device which is bonded to one face ofthe motor winding.
  • Power is brought to the motor windings via leads that are passed through the hollow center of the drive end cap and stationary shaft. These leads are terminated exterior to the open end of the stationary shaft where they can be connected to a variety of controllers.
  • a controller may be used to regulate the speed, direction, and allow for integration into computer, PLC, or digitally based control system.
  • a planetary or cycloidal gear set is provided.
  • the sun gear is mechanically fixed to the shaft of the motor core. It causes the planet gear or gears to rotate about the gear pins fixed between the motor end cap and gear end cap and stationary shaft.
  • the rotation ofthe planet gears transmits rotary motion to the output ring gear which is mechanically fixed to the interior surface ofthe pulley drum.
  • a twin disk cycloidal gear arrangement is used.
  • the present invention relates to a motorized pulley system 5, preferably a conveyor system 5, for moving an article 8 or articles which preferably includes a belt 10, a plurality of rollers 12, and a motorized pulley assembly 15 for driving the belt 10.
  • the conveyor system 5 is shown where the motorized pulley assembly 15 is comprised of an outer pulley drum 18 containing a brushless DC motor 24 for providing variable speed to the pulley.
  • the drum 18 and the rollers 12 may be mounted to the floor of factory by a mounting post 20.
  • the rollers 12 and the drum 18 may be secured to the posts 20 by a clamp 19 as is known in the art.
  • the motorized pulley system 5 ofthe present invention may be used in web feed rollers (such as those disclosed in U.S. Patent No. 5,657,941 , inco ⁇ orated herein by referenced), film feed rollers, shrink wrap systems (such as those disclosed in U.S. Patent No. 5,575,138, inco ⁇ orated herein by reference), slider bed conveyors, troughing conveyors, slat conveyors, table-top conveyors, roller bed conveyors, plastic chain conveyors, and other such systems.
  • web feed rollers such as those disclosed in U.S. Patent No. 5,657,941 , inco ⁇ orated herein by referenced
  • film feed rollers such as those disclosed in U.S. Patent No. 5,575,138, inco ⁇ orated herein by reference
  • shrink wrap systems such as those disclosed in U.S. Patent No. 5,575,138, inco ⁇ orated herein by reference
  • slider bed conveyors such as those disclosed in U.S. Patent No. 5,575,138, inco ⁇ o
  • the conveyor system 5 Most parts ofthe conveyor system 5 are constructed of stainless steel although some other low carbon steel or other suitable material will suffice.
  • the conveyor system 5 may be also constructed of other suitable materials such as aluminium, steel, and plastic.
  • the conveyor system 5 ofthe present invention generally provides consistent torque output over a wide range of RPMs. Further, most parts ofthe system 5 are lubricated with synthetic lubricators to ensure maximum lubrication protection and cleanliness.
  • the belt 10 may be made of rubber or some other suitable material.
  • the belt 10 may also be constructed of multiple steel chain links. Additionally, the belt 10 may be constructed of webbing, lattice or a variety of other materials and in different configurations as is known in the art.
  • the belt 10 has a speed range which may be 30-300 feet per minute (FPM) which is generally equivalent to about 21-214 RPM.
  • At least one roller 12 is in operable association with the conveyor belt 10 and driven by the motorized pulley assembly 15.
  • the plurality of rollers 12 are spaced generally every one to three feet along the conveyor system 5.
  • Each ofthe rollers 12 is preferably in operable association with the conveyor belt 10 and indirectly relies on the motorized pulley assembly 15 for rotation.
  • some rollers may not be associated with the belt 10 and may rotate under their own power.
  • a pair of stationary shafts 34, 50 connect to the pulley assembly 15 to conveyor belt 10.
  • the rollers 12 have preferably a similar outer design as the pulley assembly 15 and have connecting shafts 14 as well.
  • the preferably cylindrical drum 18 may have a variety of configurations.
  • the drum 18 may have a crowned or straight profile.
  • the drum may have a machined or knurled outer casing or finish for added friction.
  • the pulley drum 18 is preferably a standard 5.45" outer diameter pulley for adoption into generally any existing conveyor system. However, a variety outer diameters, such as 4.25", 8.0", and 30" are contemplated.
  • FIG. 1A shows a series of conveyor systems 5 ofthe present invention, one of which utilizes a telescoping take-up member 22.
  • the pulley drum 18 is mounted to the by clamp 19 which is secured to the mounting post 20 by bolts 19a (Fig. 2).
  • the telescoping take-up 22 may be connected to the conveyor system 5 by preferably four bolts 22a as shown or other fasteners.
  • the motorized pulley assembly 15 has a pulley drum 18 which has a first end 28, a second end 30, and an inner cavity 32.
  • a first outer casing end plate 26a seals off the first end 28 ofthe pulley drum 18.
  • the outer casing end plate 26a has a bore 26b therethrough.
  • a first stationary shaft 34 has a first shaft portion 34a and a second shaft portion 34b. The first stationary shaft 34 first shaft portion.34a is received in the first outer casing bore 26b.
  • a gear end cap 35 may be connected to the second portion 34b ofthe stationary shaft 34.
  • End plates 26a, 26c are secured to the drum 18 by a plurality of bolts 18a, 18b, respectively, or other suitable fasteners which be tightened to seal the inner cavity 32 ofthe drum 18 and the motor 24 from liquids or other potentially harmful contaminates.
  • the motorized conveyor pulley assembly may also have a magnetic particle trap (not shown) to collect particles which could otherwise damage the motor 24 and gears.
  • the brushless DC motor 24 may include a center shaft 31. Magnets 33 are fixed around the center shaft 31.
  • the motor 24 also includes a motor core 39 having a hole therethrough.
  • a motor winding 40 generally surrounds the motor core 39.
  • the motor winding 40 may be constructed of copper or some other suitable material, as is known in the art.
  • a motor end cap 44 has a hole 44a therein for receiving the shaft 31.
  • a solid state Hall effect ring 27 may be bonded to one face ofthe motor winding 40.
  • a second stationary shaft 50 is received in the hole 48a ofthe drive end cap 48.
  • the first and second stationary shafts 34 have a portion that sticks out ofthe ends 28, 30 ofthe drum 18.
  • these first portions 34a, 34c ofthe shafts 34, 50 may have flatten sides which help clamps 19 keep the shafts 34, 50 from rotating.
  • the motor 24 may also have a skewed stator design to minimize cogging a low RPM.
  • leads 82 fit into the hollow first portion 37c ofthe second shaft 50 connect the motor 24 to a AC power source 84 which may be a conventional outlet.
  • the leads 82 bring power to the motor windings 40.
  • the leads terminate exterior to the open end ofthe second stationary shaft 50 and connect to controller 72. No slip ring is necessary because the leads 82 run directly into the stationary shaft.
  • the brushless DC motor 24 is operable within a voltage range between 100 and 250 DC volts.
  • the DC motor 24 is preferably capable of producing at least one horsepower of torque at the pulley drum 18, although a variety of torque outputs are contemplated including a motor capable of producing 100 HP of torque.
  • the motor 24 may also be used to incrementally advance the conveyor belt 10.
  • the motor 24 also preferably has class "H" insulation for added safety.
  • the motor 24 ofthe conveyor system of the present invention may also be more energy efficiency than prior art motors because of low current draw. For example at 1 HP, the draw would be about 5.8 amps. This also may also increase the motor's thermal efficiency.
  • the magnets 33 may be rare earth magnets or magnets of another suitable material.
  • the magnets 33 are preferably constructed from neodymium (NEO). Iron and boron are preferably combined with the NEO. Any other rare earth magnets, such as those made samarium cobalt, which possess excellent magnetic performance may be used.
  • the NEO rare earth magnets 33 provide for higher HP and torque output from the motor 24.
  • a gear assembly 43 is provided to transmit rotational power to the drum, reduce the motor's speed and increase output torque.
  • an output ring gear 36 ofthe gear assembly 36a may be adjacent to the gear end cap 35.
  • at least one planet gear 37 is operably associated with the output ring gear 36.
  • a sun gear 38 is connected to the center shaft 31 ofthe motor 24.
  • the sun gear 38 may be in operable communication with one or more planet gears 37, 37a, 37b, as shown in FIG. 5, to drive the planet gears.
  • the gears act to evenly distribute radial load and motion to an inner diameter of a rotating drum.
  • the gears may rotate about gear pins fixed between the motor end cap and the gear end cap and stationary shaft.
  • the planet gears transmit rotary motion to an output ring gear which is mechanically fixed to the interior surface ofthe pulley drum.
  • the gear assembly 43 may consist of a compound planetary gear assembly which may include spur gears, helical gears, and planetary gears.
  • the motor 24 rotates on a first motor bearing 42 having a hole therethrough in communication with the second shaft portion 34d at the drive end cap 48.
  • the motor end cap 44 and the gear end cap 35 may be secured by bolts 44a and 35a, respectively.
  • a second motor bearing 46 has a hole 46a therethrough for receiving the motor core 39.
  • a drive end cap 48 may have a hole 48a for receiving a second motor bearing 46.
  • a motor housing 56 protects the motor 24 and core 39. The housing 56 surrounds the motor 24 and is located between the motor end cap 44 and the drive end cap 48.
  • the shafts 31 , 34, and 50 act mechanically as single center shaft. Basically, all rotating elements rotate around a fixed center through shaft comprised of a number of mechanically joined components that act as a single mechanically locked, rigid, continuous center through shaft.
  • the shafts 31, 34, 50 act as a single power-transferring shaft for driving power along a single central axis.
  • this fixed center through shaft is comprised of a series of mechanically joined elements including the gear end, the end cap and the first stationary shaft, three gear pins, the motor end cap, the motor housing and the drive end cap and the second stationary shaft. This configuration has many benefits including fewer components which makes it a simpler unit that is potentially less expensive, easier to maintain, and cheaper to repair.
  • a bearing such as a spherical roller bearing 68, 68a may be located at the first end 28 and second end 30 ofthe pulley drum 18.
  • the bearings 68, 68a surround the stationary shafts 34, 50 and fit into the outer casing end plates 26a, 26c which have recesses 25a, 25b for receiving the spherical roller bearings 68, 68a.
  • a pair of shaft seals 94 abut a pair of plastic seals 92.
  • the plastic seals 92 abut a pair of bearing seals 70 which act in cooperation to seal the drum 18.
  • Other shaft sealing members 86 such as O-rings 88 may be also present.
  • the sealing member 86 may include an outer metal bearing seal 90 over a plastic seal 92 that fits over a shaft seal 94 contained within the recess in the outer casing end plates.
  • the sealing members 86 may consist of a sealing gel.
  • a controller 72 is preferably capable of varying the speed ofthe conveyor belt 10 between 20 and 200 feet per minute, although faster and slower speeds are contemplated.
  • the central function ofthe controller 72 is to regulate the speed and direction and allow constant speed control regardless of motor load.
  • the controller 72 may be mounted directly to the conveyor system 5 or be remotely mounted.
  • the controller 72 has a National NEMA 4/12 stand alone enclosure to provide maximum protection and safety.
  • the controller 72 may also have a speed control output which is accurate +/-.5% ofthe desired set speed. Further, the controller may control the conveyor belt's preset belt advance lengths, start points, stop points, and pause points.
  • the configuration ofthe controller 72 also provides for maximum efficiency, overload protection, stall protection, size advantage, and constant torque through the full range of speeds.
  • a digital front end with programmable logic controls (PLC) or personal computer controls may also be used to maintain constant speed under varying loads.
  • PLC programmable logic controls
  • a removably connected digital DC controller plug-in may be provided for dynamically changing the speed of the conveyor.
  • suitable connections for serial input/output connector such as RS232, RS422, RS485 or analog connector including a 0-10 volt DC or 4-20 ma connector may be supplied.
  • the conveyor system may be capable of any variable speed from 0 RPM to the maximum design RPM ofthe DC motor.
  • a removably connected tachometer readout 58 may also be provided on the conveyor system 5.
  • the sensor for the tachometer is preferably part ofthe Hall effect sensor.
  • the tachometer 58 may be a digital LED system.
  • the motor 24 may also have a switch or control input 56 for selectably reversing the direction of travel ofthe conveyor belt 10.
  • the switch 56 may provide electrically switched on-the-fly reverse motion to the conveyor system 5.
  • the conveyor system 5 also preferably has a built in internal feedback system 80 for
  • the feedback system 80 also allows the conveyor system 5 to maintain constant speed under varying loads. For example, one way the feedback system 80 does this is by determining armature position within the motor and then calculating the number of RPMs ofthe drum 18. _ .
  • the Hall effect device or sensor 27 is operably connected to the motor controller 72 and operably associated with the pulley drum 18 for providing a control signal.
  • the Hall effect sensor further allows for smooth transitions between starting and stopping, as well as, soft starting and stopping of the brushless DC motor 24 and serves as source for the tachometer 58.
  • the motor 24 has a fixed number of poles, and the Hall effect sensor 27 senses the position of a given pole at a given point in time to determine the relative position ofthe pulley drum 18.
  • the DC motor 24 also may act as a servo with aid ofthe Hall sensor 27 to incrementally move and advance the conveyor belt 10 forward and stop.
  • Hall effects are magnetic sensors 27 preferably built into the core 39 or rotor ofthe motor 24.
  • the sensor 27 senses the rotor's position relative to the stator and sends a signal to the controller 72 telling the controller when to send power to the stator. This causes the shaft 31 of the motor 24 to turn.
  • the gear assembly 36a includes a cycloidal gear arrangement or reducer 61 which acts in communication with the motor shaft 31.
  • the gear arrangement 61 includes two main disks 74a, 74b having offset elliptical rotations.
  • the two disk system is used to increase torque capacities and offer an exceptionally smooth vibrationless drive.
  • at least 2/3 of gear arrangement's teeth share the shock of overload, and each tooth is cycloidally shaped so it cannot be sheared off.
  • the cycloidal gear arrangement also has a unique capacity for frequent stop-start and severe reversing.
  • flywheel (WR ) effect in the reducer 61 may be reduced to a minimum, so that it responds quickly in these applications.
  • the shear-free cycloidal teeth also make the reducer 61 ideal for those applications which quickly wear out competitive reducers. Moreover, although the cycloidal reducers 61 may be considerably smaller than conventional reducers, they don't sacrifice efficiency in the higher rations as other compacts must. Further, the reducer's smooth, almost frictionless operation may all but eliminate the conventional limitations due to heat.
  • Figure 7 is a graph showing the torque graphed as a function of speed in terms of RPMs and of amperage for the motor ofthe present invention. As is shown, it can be seen that the torque may have a relatively flat and generally smooth output curve over the full speed range of the system. This flat torque over varying speeds is a function ofthe motor, Hall senser and controller. The preferred motor, Hall senser and controller combination will deliver a flat torque at maximum torque over the entire speed range ofthe motorized pulley.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)

Abstract

L'invention porte sur une poulie motrice pour convoyeurs et autres applications industrielles comportant un tambour (18) cylindrique lui étant liée. Le tambour, qui présente une première et une deuxième extrémité et des joues sur chacune d'elles, peut également comporter un carter extérieur ou une finition. On peut également prévoir divers joints tels que des joints toriques, pour isoler le carter extérieur, les joues, et l'intérieur du carter de la pollution. L'arbre central traversant fixe peut être muni de plusieurs éléments non tournants fixés mécaniquement tels qu'une buté d'engrenage, une joue (35) et un premier arbre fixe (34), trois axes de pignons, un flasque (44) de fermeture du moteur, le carter (65) du moteur, un flasque (48) de protection du moteur côté entraînement, et un deuxième arbre (50) fixe ou un train d'engrenages cycloïdes de substitution. Les deux arbres fixes assurent par ailleurs la liaison entre le tambour et la bande du convoyeur. Le tambour contient le moteur dont le rotor, qui assure entraînement, comporte une série d'aimants (33), de terres rares NEO ou d'un matériau adapté, collés et fixés à l'arbre moteur. La rotation du rotor se fait autour de deux paliers radiaux (42, 46) montés à force dans les joues et dans le moteur. Le rotor est entraîné par le champ électrique de ses enroulements. Le champ progresse dans les enroulements sous l'action d'un dispositif (27) à effet Hall monté sur une de leurs faces. Une unité de commande réglant la vitesse et la direction, permet de maintenir la vitesse constante indépendamment de la charge. Les conducteurs (82) alimentant les enroulements du moteur en courant traversent le centre du flasque de protection du moteur côté entraînement et de l'arbre fixe creux et sortent du côté ouvert de l'arbre fixe pour se raccorder à l'unité de commande. On peut prévoir un train d'engrenages pour transmettre la force motrice au tambour, et pour réduire la vitesse du moteur et augmenter le couple.
PCT/US1998/012730 1997-06-19 1998-06-18 Poulie motrice a vitesse infiniment variable pour convoyeur a moteur c.c. sans balais WO1999000317A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU81521/98A AU8152198A (en) 1997-06-19 1998-06-18 Infinitely variable speed motorized conveyor pulley using a brushless dc motor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5023897P 1997-06-19 1997-06-19
US60/050,238 1997-06-19

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001049591A1 (fr) * 2000-01-05 2001-07-12 Emerson Electric Co. Poulie de bande transporteuse motorisee a charge interne reduite
WO2002040933A1 (fr) * 2000-11-17 2002-05-23 Outokumpu Oyj Dispositif de frittage sur bande en continu
DE10337529A1 (de) * 2003-06-20 2005-01-13 Rulmeca Faa Gmbh Trommelmotor
WO2005019070A1 (fr) * 2003-07-31 2005-03-03 SSI Schäfer PEEM GmbH Rouleau de transport motorise, dispositif de commande de rouleau de transport, systeme de rouleaux de transport et procede de commande de systeme de rouleaux de transport
EP1666387A1 (fr) * 2004-12-06 2006-06-07 Rockwell Automation Technologies, Inc. Poulie motorisée
WO2007036267A1 (fr) * 2005-09-23 2007-04-05 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Presse a fonctionnement continu
EP2184836A1 (fr) * 2008-11-10 2010-05-12 Interroll Trommelmotoren GmbH Moteur à barillet avec refroidissement amélioré
US7777440B2 (en) 2005-08-01 2010-08-17 Itoh Denki Co., Ltd. Motor driving circuit and method for controlling a motorized roller
WO2011124313A1 (fr) * 2010-04-07 2011-10-13 Sew-Eurodrive Gmbh & Co. Kg Entraînement par galets
CN102320454A (zh) * 2011-09-23 2012-01-18 大连精意科技有限公司 气动辊筒
WO2013023203A2 (fr) 2011-08-11 2013-02-14 Mol Belting Systems, Inc. Agencement d'enveloppe de tambour motorisé
CN105529867A (zh) * 2014-09-29 2016-04-27 财团法人金属工业研究发展中心 驱动滚筒
EP3138791A1 (fr) * 2015-08-24 2017-03-08 Interroll Holding AG Moteur a tambour et cartouche de capteur pour un moteur a tambour
US9688473B2 (en) 2015-03-02 2017-06-27 Lorin Reed Conveying systems and methods of use
WO2017123441A1 (fr) * 2016-01-11 2017-07-20 Laitram, L.L.C. Poulie motorisée et système d'entraînement de bande
DE102016114524A1 (de) * 2016-08-05 2018-02-08 Interroll Holding Ag Trommelmotor mit Frequenzumrichter und optionalem Bandspannungssensor
US10618740B2 (en) 2017-11-22 2020-04-14 Lorin Reed Produce conveying and sizing equipment

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Cited By (42)

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WO2001049591A1 (fr) * 2000-01-05 2001-07-12 Emerson Electric Co. Poulie de bande transporteuse motorisee a charge interne reduite
US6443295B1 (en) 2000-01-05 2002-09-03 Emerson Electric Co. Motorized conveyor pulley with reduced internal loading
WO2002040933A1 (fr) * 2000-11-17 2002-05-23 Outokumpu Oyj Dispositif de frittage sur bande en continu
US6805235B2 (en) 2000-11-17 2004-10-19 Outokumpu Oyj Device for continuously operated belt sintering
CN100358786C (zh) * 2000-11-17 2008-01-02 奥托库姆普联合股份公司 用于连续作业的带式烧结的装置
DE10337529A1 (de) * 2003-06-20 2005-01-13 Rulmeca Faa Gmbh Trommelmotor
US7207433B2 (en) 2003-07-31 2007-04-24 Ssi Schaefer Peem Gmbh Motor-operated conveying roll, control device for a motor-operated conveying roll, roller conveying system and control method for a roller conveying system
EP1671901A1 (fr) * 2003-07-31 2006-06-21 SSI Schäfer Peem GmbH Rouleau de transport motorisé,dispositif de commande de rouleaux de transport, système de rouleaux de transport et procédé de commande de système de rouleaux de transport
WO2005019070A1 (fr) * 2003-07-31 2005-03-03 SSI Schäfer PEEM GmbH Rouleau de transport motorise, dispositif de commande de rouleau de transport, systeme de rouleaux de transport et procede de commande de systeme de rouleaux de transport
EP1666387A1 (fr) * 2004-12-06 2006-06-07 Rockwell Automation Technologies, Inc. Poulie motorisée
US7299915B2 (en) 2004-12-06 2007-11-27 Reliance Electric Technologies, Llc Motorized pulley
US7777440B2 (en) 2005-08-01 2010-08-17 Itoh Denki Co., Ltd. Motor driving circuit and method for controlling a motorized roller
WO2007036267A1 (fr) * 2005-09-23 2007-04-05 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Presse a fonctionnement continu
EP2184836A1 (fr) * 2008-11-10 2010-05-12 Interroll Trommelmotoren GmbH Moteur à barillet avec refroidissement amélioré
WO2011124313A1 (fr) * 2010-04-07 2011-10-13 Sew-Eurodrive Gmbh & Co. Kg Entraînement par galets
CN103875165A (zh) * 2011-08-11 2014-06-18 摩尔转动带系统有限公司 机动化滚筒壳体安排
JP2014525723A (ja) * 2011-08-11 2014-09-29 モル ベルティング システムズ，インコーポレイテッド 電動ドラムシェル装置
WO2013023203A3 (fr) * 2011-08-11 2013-04-25 Mol Belting Systems, Inc. Agencement d'enveloppe de tambour motorisé
KR20140053286A (ko) 2011-08-11 2014-05-07 몰 벨팅 시스템즈, 인코포레이티드. 모터형 드럼 셸 장치
CN103857607A (zh) * 2011-08-11 2014-06-11 摩尔转动带系统有限公司 就地清洗系统和密封性监测
WO2013023203A2 (fr) 2011-08-11 2013-02-14 Mol Belting Systems, Inc. Agencement d'enveloppe de tambour motorisé
WO2013023204A3 (fr) * 2011-08-11 2014-09-25 Mol Belting Systems, Inc. Montage de réducteur cyclo
US9919875B2 (en) 2011-08-11 2018-03-20 Mol Belting Systems, Inc. Motorized drum shell arrangement
CN104115376A (zh) * 2011-08-11 2014-10-22 摩尔转动带系统有限公司 发行星针轮减速机安排
JP2014531180A (ja) * 2011-08-11 2014-11-20 モル ベルティング システムズ, インコーポレイテッドMol Belting Systems, Inc. サイクロ減速機装置
US20140346906A1 (en) * 2011-08-11 2014-11-27 Mol Belting Systems, Inc. Motorized drum shell arrangement
EP2742582A4 (fr) * 2011-08-11 2015-03-04 Mol Belting Systems Inc Agencement d'enveloppe de tambour motorisé
US9321595B2 (en) 2011-08-11 2016-04-26 Mol Belting Systems, Inc. Cyclo reducer arrangement
CN102320454A (zh) * 2011-09-23 2012-01-18 大连精意科技有限公司 气动辊筒
CN105529867A (zh) * 2014-09-29 2016-04-27 财团法人金属工业研究发展中心 驱动滚筒
US9688473B2 (en) 2015-03-02 2017-06-27 Lorin Reed Conveying systems and methods of use
US10118769B2 (en) 2015-03-02 2018-11-06 Lorin Reed Conveying systems and methods of use
US10457491B2 (en) 2015-03-02 2019-10-29 Lorin Reed Conveying systems and methods of use
US10815065B2 (en) 2015-03-02 2020-10-27 Lorin Reed Conveying systems and methods of use
EP3138791A1 (fr) * 2015-08-24 2017-03-08 Interroll Holding AG Moteur a tambour et cartouche de capteur pour un moteur a tambour
WO2017123441A1 (fr) * 2016-01-11 2017-07-20 Laitram, L.L.C. Poulie motorisée et système d'entraînement de bande
US10589935B2 (en) 2016-01-11 2020-03-17 Laitram, L.L.C. Motorized pulley and belt-drive system
DE102016114524A1 (de) * 2016-08-05 2018-02-08 Interroll Holding Ag Trommelmotor mit Frequenzumrichter und optionalem Bandspannungssensor
DE102016114524B4 (de) * 2016-08-05 2020-09-03 Interroll Holding Ag Trommelmotor mit Frequenzumrichter und optionalem Bandspannungssensor
US10618740B2 (en) 2017-11-22 2020-04-14 Lorin Reed Produce conveying and sizing equipment
US10934098B2 (en) 2017-11-22 2021-03-02 Lorin Reed Methods of conveying and sizing produce
US11319157B2 (en) 2017-11-22 2022-05-03 Lorin Reed Produce conveying and sizing equipment

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