Showing papers on "Pulley published in 2007"

Manipulator for medical use

Abstract: In a manipulator, an actuator block contains motors and rotary shafts extending from the motors. A working unit of the manipulator contains a connecting portion, attachable to and detachable from the actuator block. The connecting portion has pulleys connectable to ends of the rotary shafts, and has a locking plate movable by alignment pins. The locking plate has slits, which are engaged with plate-shaped portions formed on the upper ends of the pulleys. A coil spring is placed between the locking plate and a top plate.

Surgical stapling apparatus with powered retraction

Abstract: A surgical stapling apparatus comprises a handle assembly, an actuation shaft having a connector, and a retraction mechanism positioned within the handle assembly. The retraction mechanism includes a motor coupled to a transmission shaft, a first gear rotatably mounted on the transmission shaft, the first gear configured to engage a second gear, a clutch operatively attached to the second gear, a main shaft rotatably connected to the clutch, and a pulley coupled to the main shaft, the pulley being operatively attached to the connector. The connector and the pulley may be attached via a cable. The retraction mechanism may include a spring motor for maintaining the cable in tension. The spring motor may have a spring element wrapped around and interconnecting at least two arbors.

Power transmission mechanism and manipulator

Abstract: A power transmission mechanism comprising: a flexible power transmission element; a pair of a drive pulley and a driven pulley on which the flexible power transmission element is wound, each the pulley having a pin-embedding hole formed to extend from the outer circumferential thereof toward the center thereof, and a slit elongated in the circumferential direction of the pulley to extend to opposite sides of the embedding hole and communicating with the embedding hole; and a pair of columnar or tapered anchor pins each having a path hole penetrating the anchor pin across the lengthwise direction thereof to receive the flexible power transmission element inserted therein, wherein each the anchor pin receiving the flexible power transmission element in the path hole thereof is embedded in the embedding hole of the associated pulley under pressure, and the flexible power transmission element is thereby held on the pulley

A2 pulley incision or one slip of the superficialis improves flexor tendon repairs.

Abstract: Outcomes of flexor tendon repairs in the area covered by major pulleys are often unpredictable. We performed an in vivo study to investigate biomechanical effects of pulley incision, Kapandji pulley plasty, excision of one slip of the flexor digitorum superficialis, or closure of the incised pulley on function of the profundus tendons. Both long toes (104 total) of 52 leghorn chickens were divided into four experimental groups and one control group. The pulley and flexor digitorum superficialis tendon were subjected to the above-mentioned treatments in four groups, with 22 toes per group, after tendon transection in the A2 pulley area. Eight weeks after surgery, incision of the pulley improved excursion of the flexor digitorum profundus tendon and decreased the work of digital flexion over pulley closure. Resection of the one slip of the flexor digitorum superficialis tendon had results similar to pulley incision. Kapandji pulley plasty did not increase tendon excursion and decrease the work compared with a simpler pulley incision. Adhesions were more severe with pulley plasty or closure than with pulley incision. In this avian model, incision of the pulley or partial flexor digitorum superficialis resection improved outcomes of tendon repairs compared with pulley closure. Kapandji pulley plasty did not improve the outcomes over a simple pulley incision.

Joint structure and robot arm

Abstract: A joint structure includes a rotating guide pulley, a fixed guide, and a rotating guide pulley. The rotating guide pulley is coaxial with a rotating shaft of a revolute joint, and is arranged so as to be rotatable about the rotating shaft. The fixed guide is arranged in a first structure, and has an arc portion. The arc portion has the same radius as the rotating guide pulley and is coaxial with the rotating guide pulley. The rotating guide pulley is arranged in a second structure so as to be relatively movable. A wire is put round the rotating guide pulley, the movable rotating guide pulley, and the fixed guide in the order of them.

Full-automatic multi-station tube end forming machine

Abstract: A full-automatic multiple working position pipe end shaping machine is provided, which belongs to a new product type for the pipe end shaping machine of air conditioner tubing The utility model comprises a function control circuit, a oil pressure providing device, an air pressure providing device, a machine stand and a mechanical execution device, and is characterized in that: the mechanical execution device comprises a feeding mechanism, a working position transferring mechanism, a shaping mechanism and a shedding mechanism; the feeding mechanism comprises a trough, a vibration feed stand, a vibration speed regulation motor and a feeding cylinder group; the working position transferring mechanism comprises a rotor axis, a cam, a rotary disc, an auxiliary ring, a working piece clamp, a propping block, a ratchet wheel, a ratchet claw, a swing link, a position transferring cylinder group and a positioning cylinder group; the shaping mechanism comprises a mounting plate, a slide board, a guide rod, a shaping cylinder group, a contraction or expansion mould and the mould stand, a level opening or chamfering tool seat pole and relevant cuter, belt pulley, belt and electromotor Compared with the existing semi-chemical pipe end shaping machine, the utility model has advantages of that: firstly, high automation level and high average personal working efficiency; secondly high process precision and yield rate; thirdly, little labor intensity; fourthly, convenient, reliable, stable and safe application; fifthly, wide processing scope, thus ensuring the pipes with the diameter of 635 to 127mm and the length of 40 to 1,500mm

Operating and mounting system for a window covering

Abstract: An operating unit (5) for operating a window covering. The operating unit (5) includes a housing (11), a rotatable drive pulley (13) having an axis of rotation and first and second mounting positions in the housing, with respect to the axis of rotation, an engagement device (15), rotatable about the axis of rotation, and a brake mechanism (45, 47, 49) for, in use, arresting the engagement device when the drive pulley (13) is not rotated and preventing the engagement device and drive pulley from being back driven by the window covering. The engagement device (15) has a plurality of circumferentially spaced pins (19) parallel to the axis of rotation. The drive pulley (13) has a corresponding plurality of openings (17) facing the pins (19). In the first mounting position, the pins on the engagement device (15) engage with the corresponding openings (17) in the drive pulley and the engagement device rotates with the drive pulley. In the second mounting position, the pins (19) do not so engage and the engagement device (15) thereby can rotate relative to the drive pulley (13).

From transmission error measurement to Pulley-Belt slip determination in serpentine belt drives: influence of tensioner and belt characteristics

Abstract: Serpentine belt drives are often used in front end accessory drive of automotive engine. The accessories resistant torques are getting higher within new technological innovations as stater-alternator, and belt transmissions are always asked for higher capacity. Two kind of tensioners are used to maintain minimum tension that insure power transmission and minimize slip : dry friction or hydraulic tensioners. An experimental device and a specific transmission error measurement method have been used to evaluate the performances of a generic transmission by determining the pulley–belt slip for these two kinds of tensioner. Transmission error between pulleys, pulley/belt slip are deduced from pulley rotation angle measurements. Results obtained show that : the use of tensioner limits belt slip on pulleys, pulley–belt slip is reachable from transmission error measurement, belt non uniform characteristics are responsible of low frequency modulations of transmission error.

Belt conveyor and method

Abstract: A belt conveyor includes at least one belt module defined by at least one drive pulley and at least one other pulley that is generally an idler pulley positioned between opposite sidewalls of the conveyor, and having a continuous belt routed around the drive pulley and the other pulley. The drive pulley is operable to drive the continuous belt around the pulleys to move articles along the zone assembly. The belt conveyor may incorporate features that allow for improved maintenance methods and reduced down time during service intervals. These features may include a removable belt module, at least one pulley mounted on at least one pivot arm, or a combination thereof. The belt may have a low modulus characteristic and may be initially stretched when the belt is reeved or routed around the pulleys and the pivot arms are moved into their operating position.

Continuously variable transmission with external cam

Abstract: A continuously variable transmission includes: (a) at least one external, three-dimensional cam; (b) at least four follower assemblies, each including a planet pulley, a roller shaft, and at least one follower roller, the roller shaft being mounted on the planet pulley, the roller shaft being connected to the follower roller; (c) at least two sun assemblies, each including a sun pulley, at least one sprag clutch, and a differential pulley, the differential pulley being mounted to the sun pulley, the sun pulley driving the sprag clutch; (d) an input assembly including a sun pulley shaft, the sun pulley shaft being connected to the at least two sun pulley assemblies through the respective sprag clutches; and (e) at least one differential mechanism connecting each of the sun pulleys to at least two of the planet pulleys; wherein the cam is external to the follower assemblies.

Speed ratio change control device and method for belt type continuously variable transmission

Abstract: This invention is a speed ratio change control device for a belt type continuously variable transmission that a maximum thrust that can be generated by the primary pulley is calculated on the basis of an upper limit value of the line pressure (S3), an upper limit value of a shift speed is calculated on the basis of the maximum thrust (S5), and the target speed ratio is set on the basis of the upper limit value of the shift speed (S9).

Balanced moment lift system and method

Abstract: A lift system having a first pulley and a biasing member having a first portion operatively coupled to the first pulley. A first tension member can be operatively coupled to the first pulley. The lift system may be configured to provide a constant force to the first tension member during a defined angle of rotation of the first pulley. Such a constant force can be used to counterbalance the weight of a display supported by a stand.

Control method of hybrid vehicle

Abstract: A hybrid vehicle includes an internal-combustion engine, an engine starter ISG motor, a main motor that drives rear wheels, a CVT pulley belt disposed between an engine output shaft and a front wheel shaft, a clutch connected between the output shaft of the internal-combustion engine and an input shaft of the CVT, a battery, and a hybrid controller. When the hybrid controller determines that there is a need to add a traction force of the engine from a state where the vehicle is driven by the main motor alone, the hybrid controller controls the respective components so as to start the engine by the ISG motor in a state where the clutch is disengaged, control a speed ratio of the CVT so that a CVT input speed achieves a target speed for starting clutch engagement, detects the engine rotation speed, detects the CVT input speed, and engages the clutch when a difference between those speeds falls within a predetermined range.

System for manipulating a continuously variable transmission

Abstract: A shifter for use with a continuously variable transmission includes a grip portion and a hub portion. Specifically, the shifter is designed for use on a bicycle, but could also be used with any light vehicle. The grip portion is characterized by a rotatable adjuster that is coupled to a cable. The cable is also coupled to a hub portion. As the adjuster is rotated, the cable is pulled, in turn rotating a pulley assembly in the hub portion. As the pulley assembly is rotated, it advances a rod within a continuously variable transmission. The rod adjusts the power adjusters as described above. The grip portion is also unique in its display of information to the rider. The grip portion includes a display showing the ratio of input to output. The display also includes a filament that curves as the ration is adjusted. A high ratio renders the filament flat while the filament takes on a steep curve as the ratio is adjusted to make riding up hills easier.

Pulley tensioner for an oil wet belt drive

Abstract: A tensioner (1) for a belt drive, comprises a base (2) defining an axis (A), a mobile eccentric element (3) hinged about axis (A) and loaded by a spring (5), a pulley (4) idly connected to the mobile element (3). Specifically, the pulley (4) defines a single body with the external ring of a rolling bearing (6) mounted on the mobile element (3) and the spring (5) is helical and presents a square or rectangular cross section.

Continuously variable drivetrain

Abstract: Drivetrains and frames for vehicles, equipment, machines, etc. Some embodiments of the drivetrains and frames are particularly suited for human powered machines, such as bicycles and exercise equipment. In some embodiments, a drivetrain includes a reciprocating crank coupled to a crank pivot. A lever couples to the crank via a lever pivot positioned on the crank. A lever stop cooperates with a lever guide surface to guide a motion of the lever as the lever pivots about the lever pivot. The lever and/or the crank are operably coupled to a drive pulley, idler pulley, and/or compound pulley. In some embodiments, a drive cable operably couples the lever and/or the crank to the drive pulley, idler pulley, and/or the compound pulley. In one embodiment, one or more pulleys couple to the lever's distal ends. In some embodiments, the drivetrain includes a wheel hub adapted to receive torque from the crank via a drive pulley.

Air Conditioning for Belt-Alternator-Starter Hybrid Electric Vehicle

Abstract: A hybrid electric vehicle having an air conditioning system, an engine and a belt-alternator-starter motor-generator, and a method of operation, is disclosed. A torque transfer assembly, such as a pulley and belt assembly, engages the engine and motor-generator, and includes a clutched member for selectively disconnecting the torque transfer between the engine and motor-generator. A refrigerant compressor includes a compressor shaft rotationally coupled to and driven by the motor-generator shaft. The compressor may be driven by the motor-generator when the engine is not operating.

Roller variator for actuating continuously variable transmissions

Abstract: A continuously variable transmission (CVT) with a roller variator as an actuator for adjusting the speed ratio of the CVT. The CVT is of the variable-diameter pulley type and has first and second variable-diameter pulleys mechanically linked by a drive belt or other flexible drive member, the pulleys each having first and second relatively axially movable pulley portions. A roller variator is operatively connected to the first pulley, preferably the drive pulley, for control of its effective diameter. The roller variator has first and second disks mounted on the axis of the first pulley, a roller interconnecting the disks, and a roller support adapted to tilt the spin axis of the roller so as to change its points of contact with the disks and thereby change the speed ratio of the variator. The first disk is rotatably fixed with respect to the first pulley portion of the first pulley, for example, the pulley portion fixed to an engine shaft. In certain embodiments, the second disk directly drives the second pulley portion relative to the first, and, in other embodiments, the second disk drives the second pulley portion through a threaded connection, for example, one having directly engaging male and female threaded parts, or a ball screw.

Non-linear vibration and stability analysis of a partially supported conveyor belt by a distributed viscoelastic foundation

Abstract: The main source of transverse vibration of a conveyor belt is frictional contact between pulley and belt Also, environmental characteristics such as natural dampers and springs affect natural frequencies, stability and bifurcation points of system These phenomena can be modeled by a small velocity fluctuation about mean velocity Also, viscoelastic foundation can be modeled as the dampers and springs with continuous characteristics In this study, non-linear vibration of a conveyor belt supported partially by a distributed viscoelastic foundation is investigated Perturbation method is applied to obtain a closed form analytic solutions Finally, numerical simulations are presented to show stiffness, damping coefficient, foundation length, non-linearity and mean velocity effects on location of bifurcation points, natural frequencies and stability of solutions

Push/pull exercise apparatus, device, and method

Abstract: An apparatus, a device, and corresponding methods for exercise which involve a frame having a substantially right-angle configuration for facilitating its accommodation into a corner of a room and for optimizing its footprint in the room, a pulley system having an adjustable resistance device using a pulley ratio technique, a fixed high pull mechanism, a fixed low pull mechanism, a cross-over exercise mechanism, and a lifting bar, the lifting bar having linear bearings and handles, and the handles subtending an angle in a range of approximately 0 degrees to approximately 45 degrees.

Hydraulic control apparatus and method for belt-type continuously-variable transmission

Abstract: A hydraulic control apparatus includes a continuously-variable transmission; a line-pressure control section configured to produce a line pressure by adjusting a discharge pressure of an oil pump; a first hydraulic-pressure control section configured to adjust a first hydraulic pressure based on the line pressure, the first hydraulic pressure being supplied to the drive pulleys; and a second hydraulic-pressure control section configured to adjust a second hydraulic pressure based on the line pressure, the second hydraulic pressure being supplied to the driven pulleys. The continuously-variable transmission includes a pair of drive pulleys including a first movable pulley and a first fixed pulley; a pair of driven pulleys including a second movable pulley and a second fixed pulley; and a belt wound between the pair of drive pulleys and the pair of driven pulleys. The line-pressure control section is configured to adjust the line pressure to a value set by adding a margin pressure to higher one of the first hydraulic pressure and the second hydraulic-pressure, and configured to reduce the margin pressure when the first hydraulic pressure is higher than the second hydraulic pressure.

Apparatus for secure display of small electronic devices having an essential signal or power cord

Abstract: There is provided an apparatus for secure display of a portable electronic device wherein the device has an attached electrically conductive cable that is integral to the device and essential to the operation thereof, the device cable having a first end connected to the device and a second end, and an intermediate section, the apparatus comprising: device support means normally supporting the device and means for extending and retracting the device cable. The means for extending and retracting the cable includes pulley means having a first set of pulleys having a fixed position and a second set of linearly movable spring loaded pulleys. As the device is moved from the device support the second set of pulleys is urged towards the first set of pulleys thereby extending the device cable against the resistance of the spring loading, thereby creating retractive force for retraction of the cable. When the device is released the cable is retracted to the device support until halted by a cable stop. Headsets and earbud sets are examples of devices that are suitable for display on the apparatus.

Transient Dynamics of the Metal V-Belt CVT: Effects of Pulley Flexibility and Friction Characteristic

Abstract: A continuously variable transmission (CVT) offers a continuum of gear ratios between desired limits The present research focuses on developing a continuous one-dimensional model of the metal V-belt CVT in order to understand the influence of pulley flexibility and friction characteristics on its dynamic performance A metal V-belt CVT falls under the category of friction-limited drives as its performance and torque capacity rely significantly on the friction characteristic of the contact patch between the belt element and the pulley Since the friction characteristic of the contact patch may vary in accordance with the loading and design configurations, it is important to study the influence of the friction characteristic on the performance of a CVT Friction between the belt and the pulley sheaves is modeled using different mathematical models which account for varying loading scenarios Simple trigonometric functions are introduced to capture the effects of pulley deformation on the thrust ratio and slip behavior of the CVT Moreover, since a number of models mentioned in the literature neglect the inertial coupling between the belt and the pulley, a considerable amount of effort in this paper is dedicated towards modeling the inertial coupling between the belt and the pulley and studying its influence on the dynamic performance of a CVT The results discuss the influence of friction characteristics and pulley flexibility on the dynamic performance, the axial force requirements, and the torque transmitting capacity of a metal V-belt CVT drive

Whirling head and its use

Abstract: The frame of the whirling head comprises the rigid casing ( 7 ), in which the part ( 10 ) contains the drive pulley ( 15 ) solidly attached to the coupling member ( 17 ) connected to the drive shaft of the spindle ( 26 ). By means of the belt ( 19 ), this pulley ( 15 ) drives the pulley ( 8 ) solidly attached to the connecting cone ( 4 ), which in turn comprises the internal milling cutter ( 1 ) which cuts the thread of the screw shaft ( 27 ) supported between the bar advance unit ( 28 ) and the tailstock centre ( 29 ). The latter is mounted as an exchangeable tool on the return unit ( 32 ).

Flat-belt-like supporting and drive means with tensile carriers

Abstract: A supporting and drive belt including a belt body or sheathing which encloses tensile carriers. The running surface of the belt can be flat and parallel to the belt back or have trapezium-shaped or semicircular ribs and grooves, wherein the profile of a drive pulley or of a deflecting pulley is approximately complementary to the running surface of the belt. One or more tensile carriers are provided for each rib, wherein the tensile carriers are laid or stranded alternately in the “Z” direction and the “S” direction.

Low friction, direct drive conveyor with a raked tooth drive

Abstract: A conveyor includes an endless belt having teeth with drive faces raked away from the direction of travel. The conveyor also includes a drive pulley having sheaves with drive faces raked toward the direction of travel. The drive faces on the sheaves engage the drive faces on the teeth to move the belt and the raked angle tends to pull the belt inwardly. A stationary foot assists removing a driven tooth from its corresponding sheave.

Damper pulley assembly having a safety device

Abstract: A damper pulley assembly (1, 30) has a hub (2); a seismic mass (4) connected to the hub to define a dynamic torsional vibration damper; a pulley (3) connected to the hub (2); elastic means (10) for connecting the pulley (3) in torque-transmitting mode to the hub (2); and one-way stop means (22, 23) for arresting the pulley (3) in a first stop position with respect to the hub (2) or the seismic mass (4) in a first direction, when the elastic means (10) reach a predetermined torsional load.

Neck exercise machine

Abstract: A neck exercise machine including a frame, a seat, a set of pulleys, a head band, an adjustable tensioner, and a cable adjustably attached to the head band, threaded through the pulleys, and removably connected to the adjustable tensioner, such that when a user sits in the seat and attaches the head band, they can exercise their neck muscles in a variety of different angles, rotations, and tensions. Elastic bands, an analog/digital force gauge, or hydraulic cylinder may be used as the adjustable tensioner and incorporate processor, memory, and data output mechanisms for performance analyses. The machine can also be broken down into numerous parts for easy transport and reassembly.

Wire type window regulator

Abstract: In a window regulator 10, when a pin bolt 42 provisionally attached to a pulley 22 and a pulley support 54 is fastened to a door panel 14 by a nut 52, the pulley 22 and the pulley support 54 are supported on the pin bolt 42 and attached to a predetermined position on the door panel 14. Here, in the above-described provisionally attached state, the pin bolt 42 is held in the pulley 22 by pin member holding claws 74 of the pulley 22, and the pulley 22 is held in the pulley support 54 by pulley holding claws 68 of the pulley support 54. Consequently, when the pin bolt 42 is to be fastened to a body panel, the pulley 22, the pulley support 54, and the pin bolt 42 can be handled as a single part. Thus, the work of attaching a pulley and a pulley support to a body panel of a vehicle can be facilitated.