Showing papers on "Pulley published in 1983"

Method and apparatus for controlling line pressure in continuously variable transmission

Abstract: A continuously variable transmission includes a V-belt running over a drive pulley and a driven pulley. Upon rapid shifting in reduction ratio, a line pressure is increased temporarily to provide a proper V-belt gripping force to prevent slipping of the V-belt.

Belt drive system

Abstract: A belt drive system comprising a toothed belt having a plurality of equally spaced teeth on the surface of the belt body and toothed pulleys having a plurality of equally spaced teeth to engage with the belt teeth on the surface of the pulley body of each pulley. The belt teeth have one or more cut grooves in the longitudinal direction of the belt and the toothed pulleys have one or more ribs, to engage with the cut grooves in the belt teeth, on the surface of the pulley body of each pulley.

Wire-driving device for window regulator

Abstract: A wire-driving device for a window regulator comprising a worm wheel rotatably contained in a housing, first and second pulleys arranged at both sides of the worm wheel respectively, means for transmitting torque from worm wheel to the pulleys and a worm meshing with the worm wheel and being driven by a motor, whereby first and second wires wound round the pulleys respectively are driven. The motor driven wire-driving device is thinner than conventional devices.

Power transmission chain-belt

Abstract: A power transmission chain-belt, especially adapted to transmit power between the pulleys of a pulley transmission, such as a variable ratio pulley transmission. The chain-belt is constructed of a plurality of ranks or sets of interleaved links, each rank being joined to the next adjacent rank by pivot means, such as round pins, or a pin and rocker, to permit articulation of the belt. Trapezoidal load blocks carried by the chain have angled edge surfaces to drivingly contact the flanges of the pulleys. In one embodiment of the invention, a block is located between each adjacent pair of pivot means and at least one block has a different width than the other load blocks, so that its edges are free of contact with the flanges of the pulleys and thus do not drivingly engage the flanges. Substantially the same effect is achieved by "skipping" one or more load blocks in the assembly, i.e. by eliminating one or more load blocks in the chain-belt. These arrangements change the generated noise pattern produced when the chain-belt engages the pulley flanges.

Resilient type exercising device

Abstract: A mechanical resistance assembly employs a resilient strap which is stretched by the use of a pulley system pulled by the user. The assembly has an adjustable mechanical advantage and in a preferred use thereof being selectively coupled to a rigid, stable frame in any one of a variety of different configurations permitting a corresponding variety of different exercises to be performed by the user, some with the aid of a lever fulcrummed to the frame, but being usable also when attached to a door jamb and door or to a wall stud.

V-belt type stepless transmission

Abstract: A V-belt type stepless transmission, comprising: an input pulley and an output pulley mounted on parallel input and output shafts, respectively, each pulley having a stationary flange and a movable flange axially displaceable relative to the stationary flange and rotatable integrally therewith; an endless V-belt lapped around the input and output pulleys to transmit power therebetween, a servo mechanism for the movable flange, including a drive member having a first screw or a second screw, the first screw formed on the movable flange or on a structure integrally connected to the movable flange, the second screw threadedly engaged with the first screw for axially displacing the movable flange by rotation of the second screw relative to the first screw, and a brake provided between the drive member and a transmission case for braking the drive member, and a torsion spring interposed between the movable flange and the drive member; and a cam mechanism provided at least on one of the input and output shafts to vary the belt gripping force of the stationary and movable flanges in proportion to the torque transmitted by the V-belt.

Multiple pulley sheave assembly with retainer pulleys

Abstract: Disclosed is a multiple pulley sheave assembly for supporting a cable comprising a plurality of pulleys, including a center pulley, mounted in an arcuate path on a support frame; a pair of retainer pulleys for keeping the bend of the cable constant around the center pulley; a cable monitor coupled to the center pulley for measuring the tension, footage, and cable speed; counter-balancing weights positioned above the support frame and rigidly connected thereto; and a suspension arrangement, connected at the center of the assembly, for providing rotation of the assembly about two perpendicular axes of rotation, whereby the cable stays within a plane defined by the arcuate path.

Non-slip pulley and belt drive

Abstract: In a belt and pulley system wherein motion is transferred between the two members, the belt is a metal belt having a pulley engaging face made of a relatively soft material and the pulley is one having a regular pattern of small hard protuberances, such as formed by knurling, on its belt engaging face which press into the soft metal of the belt to form permanent depressions arranged in a matching pattern which mesh with the protuberances to provide a positive slip-free motion transfer The belt and pulley drive may be used advantageously in a device such as an X-Y plotter for accurately positioning, with good repeatibility and fine resolution, an associated member driven in one coordinate direction by the metal belt driven in turn by the knurled pulley

Power transmission casing in motorized two-wheeled vehicle

Abstract: Power transmission of the belt type which includes a transmission casing made up of a case and a cover. A drive shaft and a driven shaft each extend into the case. A drive pulley is mounted on the drive shaft and a driven pulley is mounted on the driven shaft. A belt extends over both the drive pulley and the driven pulley. A fan is mounted on at least one of the shafts. A partition plate extends the length of the casing dividing the casing into a case side compartment and a cover side compartment. The belt and the fan are positioned in the cover side compartment. The fan can be formed on an outer side of one of the pulleys including radially outwardly extending fins and side fins extending axially integrally from the radial fins. Air passages are formed between any two fins and between each side fin and the outer side of the pulley. All of the side fins together can form an annular disc.

V-belt type stepless speed change gear

Abstract: PURPOSE: To arbitrarily control a speed change gear without use of hydraulic pressure by providing a clutch for fixing relative rotation between a driving factor of a servo mechanism for axially displacing a movable flange of one of pulleys and said movable flange, and a brake for fixing said movable flange. CONSTITUTION: Sleeved hub portions 38, 47 connected with sleeved portions 33, 44 of fixed flanges 3A, 4A with a ball key are provided on movable flanges 3B, 4B of input/output pulleys 3, 4. These are respectively axially displaced by servo mechanisms 6, 7. The servo mechansims 6 is provided with a cam mechanism 9 including a cam race 94 in close contact with a cam race portion 38A of the hub portion 38 via a ball 35. In addition, the servo mechanism 7 is provided with a sleeve 72 by a driving factor connected with the outer circumference of a hub portion 47 by a ball screw, a brake 73 for down shifting for damping the sleeve 72, and an electromagnetic clutch 78 for fixing a relative rotation between the sleeve 72 and the movable flange 4B. COPYRIGHT: (C)1985,JPO&Japio

Valve actuating mechanism for engines

Abstract: A DOHC engine of the V-type has two cylinder heads each detachably secured to a cylinder block A crank shaft on the block drives two intermediate shafts, one on each cylinder head, by means of an endless flexible element An additional flexible endless element is provided in each cylinder head to drive two cam shafts from the intermediate shaft on that cylinder head Each endless flexible element together with its toothed pulleys or sprockets and its timing belt or chain is described as a wrap-around transmission

Variable pitch diameter torque sensing pulley assembly

Abstract: A variable pitch diameter torque sensing pulley assembly which includes a first pulley half with a hub and a second pulley half mounted on the hub for axial and rotational movement. The assembly includes two sets of cams and a set of cam followers for biasing the pulley halves toward each other with a force which varies directly as the torque being transmitted by the pulley assembly varies. The two sets of cams are arranged so that one set of cams transmits torque when the pulley halves are close together and biases the pulley halves toward each other with a relatively small axial force based upon the torque being transmitted and the other set of cams transmits torque when the pulley halves are far apart and biases the pulley halves toward each other with a relatively large axial force based upon the torque being transmitted.

Removable sludge cleaner for tanks

Abstract: A portable removable sludge cleaner for tanks is provided in two sections, one of which rests on top of the tank and has a travelling bridge from which is suspended the second section. This second section is a suction head carrying frame unit deposited into one end of the tank with the aid of a crane or overhead pulley. The travelling bridge section is then deposited on top of the tank by the crane or pulley. The bridge is centered for balance during the mounting operation and after depositing on the tank, the bridge is moved over the suction head unit previously deposited in the end of the tank. Ramp hitches on the bridge then engage support pins on the head unit lifting its front end off of the bottom of the tank. Pipe couplings on the rear end of the unit are then connected to counterparts depending from the bridge to lift the rear end of the unit off of the tank bottom. The bridge travels on tracks provided by the frame and is propelled by a drive screw to traverse the length of the tank. Four suction heads on the bottom of the header unit are connected by individual pipes and valves to a suction pump on the bridge to be selectively evacuated to sweep sludge from the bottom of the tank for discharge over the side of the tank from the pump. The heads are positioned to each clean a quadrant of the tank bottom.

Control method for continuously variable transmission or the like

Abstract: In order to prevent belt slippage induced by overly rapid depressurization of a chamber forming part of a continuously variable transmission V-belt pulley control arrangement, and simultaneously endow the transmission with good response characteristics, the difference between a value indicative of the desired gear ratio (e.g., the desired gear ratio per se or the desired engine speed) and one indicative of the actual gear ratio, is produced, differentiated and added to itself. The maximum value of the addition is limited (by slicing or the like) and the result used to control the hydraulic pressure prevailing in the aforementioned chamber.

Conveying system for press work materials

Abstract: A device for conveying materials, particularly between presses. A moving member is mounted to a main body for horizontal reciprocal movement. A crank shaft is rotatably mounted to the moving member for horizontal movement therewith. A feed bar is supported for sliding horizontal movement by a feed bar guide which is connected to the crank shaft by a connecting rod. Holding members such as vacuum cups are mounted to opposite ends of the feed bar for holding the materials to be conveyed. A belt having a horizontally extending upper portion is carried by a pair of pulleys for reciprocal movement about the pulleys. A revolving member is mounted on the crank shaft and coupled with the upper portion of the belt so as to moved horizontally between the pulleys and revolve at each pulley a pre-set angle about each pulley in response to reciprocal movement of the belt. Revolution of the revolving member rotates the crank shaft so as to vertically move the connecting rod, the feed bar guide and the feed bar so that the feed bar move in vertical and horizontal directions when the belt is reciprocated.

Manufacture of poly-v sheet metal pulleys and product

Abstract: A sheet steel poly-V-grooved pulley having a special cross-sectional contour is made optionally by any one of three different cold working manufacturing procedures. Special physical properties or characteristics are developed in the pulley by the manner in which the metal in the V-groove body and single and double walled terminal flanges are cold worked. The cold working involves forming in stages of manufacturing from a cup-shaped blank to the finished pulley product a stepped inner body wall surface equivalent to a tapered surface with improved substantially uniform torque transmitting strength in the grooved body from web wall to open end. Also involved in the cold working is an increase in pulley diameter in certain portions of the finished pulley and a decrease in diameter in other portions from the diameter of the side wall of the cup shaped starting blank.

Flywheel driven vehicle comprising plural flywheel energizing means and a forward reverse planetary gear set

Abstract: Flywheel drive to operate a rear axle in a wheeled vehicle is provided and consists of a shaft having a rollbar bearing on each end mounted within the wheeled vehicle parallel and near the rear axle, a flywheel affixed to the shaft, a clutch coupled to the shaft, a variable pulley attached to one side of the clutch, means for rotating the shaft and flywheel to a maximum RPM with the clutch disengaged, means for transferring forward motion from the shaft to the rear axle and means for transferring reverse motion from the shaft to the rear axle.

Control mechanism for a variable ratio drive system

Abstract: A variable ratio pulley system has a pair of pulleys mounted on input and output shafts, respectively, and interconnected by a drive belt. The pulleys are adjustably controlled in axial width to establish the drive ratio between the shafts. Each pulley has a load cam sensitive to the torque load being imposed on the respective shaft. The load cams are interconnected by a linkage and preload spring which establishes the minimum axial force operable on the pulleys. The linkage transmits forces between the pulleys thereby imposing a tension force on the belt established by the greater of the forces generated at the load cams. A drive ratio selector is connected to one side of the input pulley to add or subtract a force so that the axial forces on the input and output pulleys are properly balanced when the desired drive ratio is established. The output shaft of the pulley system is connected through a starting mechanism to a forward-reverse gear arrangement and then to a final drive and gear differential.

Component conveyor apparatus

Abstract: A conveyor apparatus for transporting elongated, flat electronic component assemblies or the like through a surface treatment chamber in a predetermined orientation. A continuous belt is provided with two parallel spaced rows of retention pins which are automatically separated in the loading zone to facilitate positioning of the assemblies on the conveyor. A wedge-shaped shoe member forces the respective pins transversely outwardly and is provided with an aperture permitting the insertion of the assemblies therethrough. Secure retention of the assemblies in the treatment chamber is assured by an inverted U-shaped channel which urges the retention pins into engagement with the component assemblies. The pins may be bent outwardly to enhance the compressive forces exerted by the pin pairs comprising the respective rows. A center-ribbed exit belt pulley deforms the belt along its longitudinal center axis thereby spreading the pin rows to aid removal of the assemblies following surface treatment. A U-shaped pin member defines a pair of retention pins. Each pin member is positioned in a given pin row thereby maintaining maximum belt flexibility enabling belt deformation over the ribbed exit pulley.

Variator drive system

Abstract: A belt drive arrangement is provided which employs a variator to interconnect a powered drive belt and a belt driven to operate either a transaxle or a transmission of a ground-engaging vehicle. The variator is secured to a pivotally mounted support member. The support member is joined to a speed control shaft which is rotatable in response to the actuation of either a foot pedal or a handle. Rotation of the speed control shaft repositions the variator with respect to idler pulleys associated with the driven belt so as to alter the vehicle's speed. Means are provided to rotate the speed control shaft by actuation of the pedal independently of the position of said handle.

Reduction ratio controlling mechanism for a continuously- variable automatic transmission of a vehicle

Abstract: A reduction ratio controlling mechanism provided within the hydraulic control system of a continuously variable automatic transmission of a vehicle including a V-belt type continuously variable transmission which comprises an input pulley and an output pulley, the effective diameter of each of said pulleys being variable by means of a corresponding hydraulic servomechanism, and a V-belt extending between said input and said output pulleys, for changing the reduction ratio of said continuously variable transmission by supplying a hydraulic fluid to and by draining same from the hydraulic servomechanism of said input pulley. The reduction ratio controlling mechanism comprises an electromagnetic up-shift valve and an electromagnetic down-shift valve each capable of producing a solenoid pressure corresponding to the running condition of the vehicle by regulating the line pressure applied thereto, and a reduction ratio control valve having a spool movable under the control of the spring force of a spring provided on one side of the spool and the solenoid pressure applied to the other side of the spool. The spring force of the spring works in the direction of movement of the spool during down-shift operation.

Clutch assembly for a planetary forward-reverse gear set

Abstract: A transmission mechanism in particular for automobiles with a front wheel drive comprises a planetary forward-reverse gear set and a continuously variable pulley drive that is drivingly connected to a differential gearing. A forward friction disk clutch provided for obtaining a forward driving direction of the transmission mechanism may be selectively operated by a servo piston that is fixedly connected in an axially stationary manner to the adjusting piston of a hydraulic adjusting means provided for the selective adjustment of the movable sheave of a primary pulley of said pulley drive whereby the mutual arrangement is chosen in such a manner that the adjusting cylinder being fixedly connected to this movable sheave at least partly surrounds the servo piston. By this particular arrangement the axial dimension of the entire transmission mechanism may be reduced without the requirement of a separate starting clutch for the entire clutch assembly.

Eccentric pulley for inelastic timing belt

Abstract: Apparatus for maintaining substantially constant tension in an inelastic timing belt driven by a rigid, swinging arm, including a driven, circular pulley, an eccentrically mounted, circular idler pulley, an inelastic timing belt mounted about the driven and idler pulleys to provide minimum tension at mid-motion and maximum tension at the start and end of motion, and a rigid swinging arm pivotably mounted equidistant from the centers of the driven and idler pulleys and secured at one end to the timing belt.

Power transmission belt

Abstract: A composite load block for a power transmission belt constructed of at least one endless band and especially adaptable for use in a variable pulley transmission, comprising an assembly of first and second block members, the second block member embracing parts of the first block member and providing an elastically yielding component between the endless band and the first block member and having a lip portion received in a notch in the next adjacent composite load block, and the power transmission belt so constructed.

Easy access pulley box

Abstract: A cover plate for an easy access pulley box conduit coupler has pairs of split ear elements extending normal thereto, which each define a slot structure. A pulley shaft extends through opposed walls of the pulley box. In assembly of the box and the cover plate, each slot structure snap fits onto an extended end of said pulley shaft.

Electromagnetic coupling device

Abstract: PURPOSE:To effectively utilize electron beam welding in the manufacture of the electromagnetic coupling device by a structure wherein a rotor, a pulley and a non-magnetic spacer are made into one piece by electron beam welding. CONSTITUTION:When an exciting coil 2 is deenergized, because of no magnetic flux, an armature 7 is separated from the rotor 3 by means of the elastic force of a plate spring 8, resulting in transmitting no power. When the coil 2 is energized, the magnetic flux PHI is developed, resulting in attracting the armature 7 to the rotor 3 and consequently transmitting the turning force transmitted to the pulley 6 to a driven shaft. Because the diameter of the spacer 4 of the rotor 3 is designed to be larger than the pulley 6, the pulley 6, the spacer 4 and the remaining parts of the rotor 3 are manufactured separately and then made into one piece by electron-beam-welding therebetween at the portions 13, 14, 15, 16 and 18. The thermal strains develped in the respective parts due to electron beam are so small that no double matching is eliminated. The welding is performed in their thrust direction or from their outer periphery in their radial direction.

Power transmission chain-belt

Abstract: A power transmission chain-belt (30), especially adapted to provide a drive and transmit power between the pulley of a pulley transmission, such as a variable ratio pulley transmission. In such each pulley has a pair of flanges, at least one of which is axially movable with respect to the other. The chain-belt is constructed of a plurality of ranks or sets of interleaved links, each rank being joined to the next adjacent rank by pivot means, such as round pins, or a pin and rocker, to permit articulation of the belt. Generally trapezoidal-shaped load blocks (44, 46) are located between the pivot means of each rank or set of links, which blocks have opposite edge surfaces to drivingly contact the flanges of the pulleys. At least one load block has a different width than the other load blocks, so as to contact the flanges of the pulley at a different radial location and different time than the other load blocks. Because of this construction, the generated noise pattern produced when the chain-belt engages the pulley flanges is modified.

Fluid filtering device

Abstract: A filtering apparatus with interconnected, rotatable drive wheel apparatus and driven wheel apparatus for rotating a pump impeller (32), preferably dual drive and driven pulley wheels (36 and 40) and an interconnecting belt (41) is described. A motor (13) is mounted on the underside (12a) of a housing (12) adjacent an outside sidewall 100a of a tank (100) which rotates the drive pulley wheel (40), the belt (41) and the driven pulley wheel (36). The driven pulley wheel (36) is mounted on a shaft (33) supporting a submerged impeller (32) inside a pump body (15). The filtering apparatus with the drive and driven wheel (36 and 40) provides positive fluid flow without priming and good balance for the filtering apparatus when mounted on the tank (100).

Toothed belt drive

Abstract: Toothed belt drive consisting of two toothed pulleys and a toothed belt wrapped around them. To reduce noise, air channels are machined into the toothed pulleys, either in the form of grooves on the circumference between the teeth or as radial holes at the base of the gaps between the teeth. In the case of flanged toothed pulleys, the flanges are perforated or slotted, allowing the air to escape sideways.