Abstract: An apparatus and a method control a continuously variable transmission of a motor vehicle which includes a power transmitting member for power transmission by use of friction. A controller of the apparatus detects slippage of the power transmitting member in a predetermined period of running of the vehicle, and increases a clamping pressure that is applied to the power transmitting member when slippage of the power transmitting member is detected. The controller also stores a state of increase of the clamping pressure in a memory, and increases the clamping pressure applied to the power transmitting member in accordance with a previous state of increase of the clamping pressure that was stored in the memory in a previous period of operation of the vehicle.

Abstract: Disclosed is a continuously variable transmission in which when a shaft torque is secured by the belt friction force generated by externally pressing a pulley, the disablement of transmission caused by a belt rolling-in phenomenon within a pulley resulting from instability of the friction force or the friction coefficient as the pressing force is applied, or the deterioration of efficiency caused by the short or surplus of the friction force of input and output pulleys in a big ratio area are overcome, as a consequence of which the stable friction transmission with high efficiency can be achieved without depending on the kind of belts such as a tension type or a compression type.

Abstract: A chain-belt transmission with a continuously variable transmission ratio has input and output shafts, each carrying a pair of conical disks, with a chain belt running in a loop around the disk pairs and transmitting torque from the input to the output shaft. The friction surfaces of the conical disks and the end surfaces of the force-transfer elements of the chain belt have contour shapes that provide greater resistance to wear and thereby increase the operating life of the transmission.

Abstract: A continuously variable transmission (1) is provided with: an endless transmission (14) for transmitting a driving torque; a clamping force (13-1, 13-2) coupled with the endless transmission (14) for applying a clamping force thereon; a controller (15) coupled with the clamping force (13) for influencing the driving torque by controlling the clamping force applied on the endless transmission (14); and a clutch (16) coupled with the controller (15), whereby the controller (15) is arranged to control the clutch such that the clutch (16) is allowed to slip continuously. The net effect of a practical implementation of the transmission in a vehicle is a fuel saving which, if a slip of around 5 rpm is permitted, amounts about 3-4%.

Abstract: A one-way bearing or clutch is provided to decouple a continuously variable transmission from the final drive member during reverse torque conditions.

Abstract: The invention comprises a continuously variable transmission pulley. The pulley comprises at least one axially moveable sheave section which is coaxial with a second sheave section. Each sheave section has a series of radial grooves which are axially and radially aligned. The radial grooves are arranged in pairs between each sheave section. The belt blocks span between the sheave sections, each having opposing arcuate ends that slidingly engaging a pair of grooves. The belt blocks are arranged circumferentially about an axial sheave centerline. Each belt block also has a surface for receiving a multi-ribbed belt. At least one elastic member encircles the belt blocks so as to control their relative positions, keeping them in contact with the sheave grooves as the pulley rotates. As the movable sheave is moved axially, each belt block moves radially within its respective grooves so as to increase or decrease the effective diameter of the pulley.

Abstract: The invention comprise a continuously variable transmission pulley. The pulley comprises at least one axially moveable sheave section which is coaxial with a second sheave section. Each sheave section has a series of radial grooves which are axially and radially aligned. The radial grooves are arranged in pairs between each sheave section. The belt blocks span between the sheave sections, each having opposing arcuate ends that slidingly engaging a pair of grooves. The belt blocks are arranged circumferentially about an axial sheave centerline. Each belt block also has a surface for receiving a multi-ribbed belt. At least one elastic member encircles the belt blocks so as to control their relative positions, keeping them in contact with the sheave grooves as the pulley rotates. As the movable sheave is moved axially, each belt block moves radially within its respective grooves so as to increase or decrease the effective diameter of the pulley.

Abstract: A pulley system for use in a constant variable transmission includes a pair of pulley sheaves or flanges mechanically linked by a belt so that the outer surfaces of the belt interact with the inner surfaces of the flanges. At least one of the pulley flanges has an inclined inner surface disposed at an angle that changes progressively based on a curve have a variable radius. For example, the sheave angle can change progressively from 9 degrees to 12 degrees or from 12 degrees to 14 degrees, with no sharp or stepped edges. The belt can have a complementary angled surface also. The progressively variable angle allows the flange surface to more closely match the side surface of the belt, which can increase the belt life be reducing stress experienced by the belt. The pulley system is useable in a transmission for a vehicle, for example a snowmobile or an all terrain vehicle.

Abstract: The invention comprises a single drive ring CVT coupler. Opposing inclined planar sides on outer circumferences of the drive ring have a high friction coefficient for enhanced engagement and power transmission between the pulleys and the drive ring. The drive ring rotationally operates between the cooperating pulleys of a moveable sheave CVT transmission. The opposing sides are inclined at an angle to each other for proper fit between the sheaves of the driver pulley and driven pulley. The drive ring operates between the outboard portions of each pulley.

Abstract: A variable speed transmission including a housing, a drive shaft having an axis of rotation and rotatably supported in the housing, an output shaft having an axis of rotation and rotatably supported in the housing, a first pulley and a second pulley both having a common axis of rotation, a third pulley having an axis of rotation and rotatably attached to the drive shaft, and a belt. The output shaft is operatively connected to the drive shaft. The first pulley and the second pulley each have a variable pitch diameter and changes in the first and second pulley variable pitch diameters being inversely proportional. The third pulley and one of the first and the second pulleys are in engagement though the belt.

Abstract: The invention comprises a drive ring CVT belt. In a CVT transmission, each variable diameter pulley has a drive ring trained around the sheaves. Each drive ring may comprise any high modulus material such as plastic or metal. An endless flexible tensile member or belt is trained between the drive rings. Each drive ring further comprises a sleeve that is trained around an outer surface of each drive ring. Each sleeve slides in a bushing on its respective drive ring. The belt has a tensile load that presses each of the drive rings together on the sleeves. The relative arrangement of the axis of rotation of each drive ring is maintained by the contact between the sleeves and the drive rings. The effective diameter or radius of each pulley is adjusted by movement of each drive ring in each pulley. Movement of the pulley sheaves causes the axis of rotation of each drive ring to move eccentrically with respect to the axis of rotation of the pulley.

Abstract: The invention comprises a belt drive ring CVT coupler. Drive rings are rotatably connected to each end of a frame. Belts are trained around the drive rings. The relative spatial arrangement of the axis of rotation of each set of drive rings is maintained by the frame, which holds the drive rings in a pre-determined relationship between the pulley sheaves. The drive ring on the driver pulley turns in the same direction as the driver pulley through frictional contact with the sides of the CVT driver pulley sheaves. The drive ring on the driven pulley side rotates in the same direction to the drive ring on the driver pulley, since they are mechanically connected by the belts. The driven drive ring is then in frictional contact with the sides of the driven pulley sheaves, thereby driving the driven pulley. The effective diameter or radius of each pulley is adjusted by movement of the pulley sheaves.

Abstract: A variable speed mechanism for propelling an associated lawn mowing apparatus has a variable pitch pulley assembly, a belt which connects the variable pitch pulley assembly to a transmission, a control arm assembly for controlling the variable pitch pulley assembly, and a speed selector for selectively adjusting the control arm assembly. The speed selector is positioned corresponding to the desired lawn mowing apparatus ground speed. This creates tension in a cable which moves a control arm. When the control arm is moved, it rotates about a pivot shaft adjusting the position of a bearing cup which, in turn, adjusts the position of the moveable pulley half within variable pitch pulley assembly. Once the pulley assembly has been positioned, the effective belt diameter is set. If the effective belt diameter is increased, the speed supplied to the transmission is increased assuming a fixed pulley size on the transmission input.

Abstract: Various configurations of a continuously variable transmission include a drive pulley, a driven pulley and a belt extending therebetween. The drive pulley is generally comprised of a moveable sheave half and a fixed sheave half. The moveable sheave half is freely rotatable relative to the drive shaft and the fixed sheave half. Torque is transferred between the moveable sheave half and the stationary sheave half through the use of a roller bearing and channel race arrangement; however, the roller bearings are freely translatable within the channel races. The continuously variable transmission also features a differential positioned between the two output pulleys and an articulating member positioned between the two input pulleys. These two members operate together to eliminate bucking of the belts caused by differences in driven speeds of the two driven pulleys in a parallel configuration of the variable speed transmission. Additionally, a method of assembling the transmission is also described.

Abstract: A belt clamp force regulator is provided for controlling the clamp force exerted on a drive belt in a continuously variable transmission. The regulator seeks to maintain a clamp force greater than that required to transmit the mechanical load consistent with the output of the generator. This ensures that the belt will not slip. However, the controller reduces belt clamp when it can so as to improve the service life of the belt.

Abstract: A continuously variable transmission includes a set of pulleys mounted on respective pulley shafts (35, 36) and mounted with an endless transmission element for transmitting rotational movement from one pulley to the other, whereby the pulleys are incorporated in the transmission pre-mounted on an common support plate (22). The transmission thereby is provided with a favorable produced housing.

Abstract: A pulley belt installer has a pulley holder (6) for holding one pulley (2) of a pair of pulleys, a held pulley width expander (5) for expanding the groove width of the pulley held by the pulley holder, a pulley belt holder (8) for holding a pulley belt in the condition in which part of the pulley belt (PB) is located in the groove of the pulley held by the pulley holder, and a pulley rotator (16) for rotating the other pulley (1) at least 90 degrees in the condition in which another part of the held pulley belt is located in the groove of the other pulley, so that the center axes of both pulleys about a rotation axis intersecting with the center axis of the other pulley are parallel, thereby assembly the pulley belt without causing overlap between the surfaces of the two V-grooves of the pair of pulleys.

Abstract: The invention comprises a geared drive ring coupler. The geared drive ring coupler comprises two pairs of adjacent drive rings rotatably connected to each end of a frame. Each pair of drive rings is meshed together with the cooperating pair of drive rings on the opposing end of the frame. The relative spatial arrangement of the axis of rotation of each set of drive rings is maintained by the frame, which in turn holds the drive rings in a predetermined relationship between the pulley sheaves. The drive rings on the driver pulley turn in the same direction as the driver pulley through frictional contact with the sides of the CVT driver pulley sheaves. The drive rings on the driven pulley side rotate in the opposite direction to the drive rings on the driver pulley, since they are meshed together. The driven drive rings are then in frictional contact with the sides of the driven pulley sheaves, thereby driving the driven pulley.

Abstract: A continuously variable chain-belt transmission has two cone-disk pulleys (pairs of conical disks) (4, 5), a chain belt (2) as well as a noise-damping device (23) for damping the noise generated by the chain-belt running over the cone-disk pulleys. The noise-damping device is arranged at the bearings of the conical disks (4, 5) and prevents sound waves from being transmitted through material portions of the transmission from the conical disks to adjacent parts.

Abstract: In a belt-type continuously variable transmission having a primary pulley provided on a primary shaft, a belt wound and hung around the primary pulley, a carrier fitted to the primary pulley in a power transmissible manner, and a bearing supporting the primary pulley, a gap allowing the primary shaft and the carrier to intersect with each other is provided between outer and inner teeth for fitting the primary shaft and the carrier to each other.

Abstract: In a V-belt type transmission having a V-belt entrained on a pulley, the pulley includes a fixed pulley half fixed to an end portion of a crankshaft and a movable pulley half supported on the crankshaft but axially slidable in opposition to the fixed pulley half. The fixed pulley half is secured with a bolt that is threaded and engaged with a female screw formed inside an end portion of the crankshaft. The V-belt type transmission is capable of securely clamping a fixed pulley half and is capable of preventing the entry of dust and water into a fixed pulley half threaded portion formed in an end portion of the crankshaft. This arrangement protects against the formation of rust and corrosion.

Abstract: A pulley useable with a driving belt in a continuously variable transmission, including a moveable pulley half having an integral cylinder portion integrally formed therewith by plastic working. The moveable pulley half includes an axially extending hollow shaft portion, a radially outwardly extending flange portion having a contact surface frictionally contacted with the driving belt, and the integral cylinder portion axially extending at near an outer peripheral portion of the flange portion. The plastic working includes forming a workpiece, machining the workpiece, spinning the workpiece to form the integral cylinder portion, heat-treating the workpiece and finishing the workpiece to complete the moveable pulley half.

Abstract: A belt-type continuously variable transmission is provided with a housing end wall that is formed with a bearing mounting hole, through which one end portion of a primary shaft penetrates, a rolling bearing that rotatably supports, in a state that it is fitted in the bearing mounting hole, the one end portion of the primary shaft having a primary pulley, a flange that projects from the inside circumferential surface of the bearing mounting hole on the housing inward side, a bearing retainer that is provided on the outside surface of the end wall and cooperates with the flange to pinch the bearing, and a cover that is connected to the housing and covers the one end portion of the primary shaft and the bearing retainer.

Abstract: A continuously variable drive mechanism has a variator with two conical disks, at least one of the conical disks being axially movable, a belt running at a variable running radius axially between the conical disks, and a disk-tightening device pushing the axially movable conical disk against the other of the two conical disks, thereby applying axial pressure to the flexible torque-transmitting device. The disk-tightening device works with guiding means converting a rotational displacement into an axial displacement.

Abstract: A pulley for use with an endless metal belt, including pulley halves rotatable about an axis. The pulley halves include truncated conical portions symmetrically opposed to each other and outer surfaces disposed on the truncated conical portions so as to be engageable with the belt. The outer surface of each pulley half has a centerline average roughness (Ra) of 0.1 to 0.5 &mgr;m, a Vickers hardness (Hv) of not less than 850 at a load of 200 g, and a microstructure with random fine irregularities in which a great number of recesses and projections are randomly located. A continuously variable transmission including the pulley is also disclosed.

Abstract: A rotary device comprising two elements (12, 20/22) supported for rotation about an axis (11) and movable relative to one another along said axis, and diaphragm spring means (33) urging said elements axially relative to one another, said diaphragm spring means having radially inner and outer portions connected respectively to said elements and arranged such that said elements are constrained to movement in opposite directions by the same or substantially the same distance as one another about an axially fixed position.

Abstract: A power transmission mechanism using metal belts including a driving pulley having first and second driving pulley-halves capable of advancing and retreating in an axial direction of a driving axis, the first and second driving pulley-halves having first and second belt guiding portions formed thereon to face each other, respectively, a driven pulley having first and second driven pulley-halves installed at a driven axis parallel to the driving axis to be capable of advancing and retreating along the driven axis, the first and second driven pulley-halves having third and fourth belt guiding portions formed thereon to face each other, respectively; and at least two metal belts capable of circulating around the belt guiding portions of the driving pulley and the driven pulley without interference, wherein each of the belt guiding portions is formed of an inclined surface having a predetermined curvature such that angular velocities of all belts can be identical at an arbitrary speed rate between the driving pul

Abstract: A relay pulley (1) for endless power transmission between a drive pulley (2) and a driven pulley (3). The relay pulley (1) comprises a rotatable hub (6) carrying, between two external fixed plates (7A, 7B), at least one member (8) movable axially on the hub (6) to delimit with the fixed plates (7A, 7B) two parallel grooves (9A, 9B) of variable dimension adapted to receive respectively a belt (4, 5) of a first (T1) or second (T2) endless belt transmission. The movable member (8) comprises at least two hollow plates (8A, 8B) mounted on the hub (6), which include facing bearing surfaces (10A, 10B) in sliding contact. The bearing surfaces (10A, 10B) are arranged to permit the approach or respectively the movement apart of the movable plates (8A, 8B).

Abstract: A pulling device transmission includes an stepless V-belt connection two pulleys wherein at least one of the pulleys is an adjusting pulley which is composed by two halves between which the belt runs through. The operative diameter of the adjusting pulley is adjustable relative to the belt plane where the belt runs thereon and the adjusting pulley halves are symmetrically pre-stressed with respect to the belt plane. A variator unit is designed for displacing the travel path of the belt in the respective to the adjusting pulley.

Abstract: A parking apparatus of a continuously variable transmission includes a manual shaft vertically provided at the front of a primary shaft for driving both parking mechanism and manual valve operating mechanism. The parking mechanism comprises a lock arm, a parking rod, a parking pawl and a parking gear provided in a secondary pulley. The parking rod is rigidly fitted to a spacer and also it is slidably fitted to a cam. The cam abuts against the spacer by the biasing force of a spring. When a select lever is not positioned at a parking range, the spacer slides on a supporter so as to disengage the parking pawl with the parking gear. When the select lever is positioned at the parking range, the cam pushes upward the parking pawl so as to engage the parking pawl with the parking gear.

Abstract: A belt transmission having an adjustable transmission ratio and a drive end and an output end. The belt of the belt transmission establishes an operative mechanical connection where the slip can be influenced between the drive end and the output end, where an influencing device influences the slip of the belt means. At least two sensor units are provided and are arranged in the area of the belt and between the drive end and an output end. The signals of these sensor units are then sent to the influencing device to influence the slip of the belt. With the sensor units arranged in this manner, it is possible in a simple manner to detect the actual slip with a high accuracy and to use this to influence the slip.

Abstract: Drive and driven pulley necessary axial thrusts (Qdrnec, Qdnnec) necessary for power transmission without belt slippage are found in accordance with the input torque and transmission ratio; the vehicle speed and degree of accelerator opening target transmission ratio (itgt) and target rate of change of transmission ratio (ditgt) are found; this axial thrust (Qdnnec) is set as the driven pulley target axial thrust (Qdncmd); and the drive pulley axial thrust necessary to obtain the target values (itgt) and (ditgt) is set as the drive pulley target axial thrust (Qdrcmd). Then, if (Qdrcmd)<(Qdrnec), this axial thrust (Qdrnec) is altered and set as the drive pulley target axial thrust (Qdrcmd) and the driven axial thrust necessary for obtaining the target values (itgt), (ditgt) is altered and set as the driven pulley target axial thrust (Qdncmd). Drive and driven pulley axial thrust control is performed such that these target axial thrusts (Qdrcmd, Qdncmd) are obtained.

Abstract: A variable diameter pulley comprises a pair of pulley main bodies (18, 19) connected to a rotating shaft (15), and a power transmission ring (20) interposed between the pulley main bodies. A belt (2) is passed around an outer periphery of the power transmission ring (20). The power transmission ring (20) is made eccentric relative to an axis (15a) of the rotating shaft (15) so as to be varied in its contact diameter (D). Both pulley main bodies (18, 19) are threadedly connected to the rotating shaft (15) by a torque cam mechanism (T) composed of a pair of thread connection mechanisms, which are inversely threaded to each other. Torque for effecting rotation of the respective pulley main bodies (18, 19) relative to the rotating shaft (15) is converted into a force, which causes both pulley main bodies (18, 19) to approach each other in equal amounts of stroke.

Abstract: An infinitely variable-speed transmission for use in the power train of a motor vehicle has two rotary sheaves and an endless flexible element trained over the sheaves to transmit torque from the flanges of one of the sheaves to the flanges of the other sheave when the one sheave is driven by the prime mover of the vehicle. The flanges have exposed conical surfaces which are frictionally engaged by the exposed end surfaces of pintles forming part of the flexible element when the latter transmits torque. The flanges are hardened, cushioned, roughened and/or otherwise treated at their exposed surfaces to promote the ability of the sheaves to eliminate or reduce noise on contact with the pintles, to stand long periods of use without extensive wear, and/or to transmit pronounced and variable torques.

Abstract: A torque-responsive clutch has an output shaft and an output pulley mounted with respect to the shaft. The output pulley includes a first sheave fixed with respect to the shaft and a second sheave axially movable with respect to the shaft. A helix is mounted with respect to the shaft. In the improvement, a roller container is mounted for driven engagement with the shaft and such container has an interior surface with a plurality of helix-contacting devices, e.g., rollers, mounted adjacent thereto. The helix extends into the container and contacts the devices. In other aspects of the improved clutch, the roller container and the second sheave define a chamber and the helix-contacting devices are confined in such chamber.

Abstract: In a continuously variable transmission, a hydraulic actuator for axially moving a movable sheave has an outer cylinder which includes a radial portion extending radially from a boss on the stationary sheave. A bearing is disposed abutting the surface of the radial portion. The inner race of the bearing has a large diameter so that the inner race contacts at least a predetermined area of the surface of the radial portion, preferably, the entire area of that surface. One side of the inner race has a recess in which a nut for axially fixing the outer cylinder, the bearing and the like is disposed, thereby reducing the axial dimension of the continuously variable transmission.

Abstract: A powered concrete finishing trowel comprises a variable ratio drive train to power one or more revolving rotors. One or more internal combustion motors power two or more downwardly projecting rotors comprising blades that frictionally contact the concrete surface. The rotors are shaft driven by reduction gear boxes. By tilting the rotors steering forces are developed. A variable gear drive unit comprises a variable ratio pulley driven by the motor. A second pulley drives the gear box input shaft, with a drive belt entrained between the pulleys. A linear actuator projecting outwardly from a stationary mounting plate terminates at a bracket assembly whose opposite end is pivoted to a rigid stabilizer that structurally compliments the linear actuator, establishing a fulcrum action applied to the bracket center. The linear actuator deflects the bracket assembly to axially displace portions of the variable ratio pulley to change the effective pulley diameter.

Abstract: A process for presuming a power-transmitted state in a metal belt-type continuously variable transmission and for controlling axial thrust in a metal belt-type continuously variable transmission wherein it is presumed that a vector sum of friction coefficients .mu..sub.TDN and .mu..sub.RDN of a driven pulley is 0.1; a friction coefficient .mu..sub.RDR of a drive pulley is 0, and a friction coefficient .mu..sub.SDR or .mu..sub.SDN of the one of the pulleys which has a smaller winding radius is 0.1. A speed ratio i, a number N.sub.IN of rotations of the drive pulley, an input torque T.sub.IN to the drive pulley and an axial thrust Q.sub.DN of the driven pulley are measured, and the measured values are introduced into relational equations of the balance of forces on various portions of a metal belt-type continuously variable transmission. In this manner, an axial thrust Q.sub.DR of the drive pulley, urging forces E.sub.1 and E.sub.2 between the blocks and the pulleys, an axis-axis force FS, ring tensions T.sub.

Abstract: An automatic transmission for an automotive vehicle includes a continually variable drive mechanism having one sheave assembly fixed to an intermediate shaft and the input sheave assembly supported on an input shaft, a low speed gearset driveably connected to the input shaft and an output shaft, a fixed ratio drive mechanism in the form of a chain drive providing a torque delivery path between the intermediate shaft and the carrier of the gearset, a transfer clutch for connecting and releasing the first sheave of the variable drive mechanism and input shaft, a low brake, a reverse gearset, a reverse brake, and a clutch for selectively driveably connecting the output of the fixed drive mechanism and a front output shaft.

Abstract: A pulley assembly of a belt type continuously variable transmission having a stationary sheave, a moving sheave and a hydraulic actuator connected at an edge thereof with the moving sheave for controlling a groove width between the stationary sheave and the moving sheave comprises, an annular groove provided at the back face of the moving sheave and an annular projection provided on the bottom surface of the annular groove for regulating a plastic flow of the edge into a fork-shape when the edge is caulked into the annular groove. Thus constituted structure of the pulley assembly provides an enough connecting strength between the hydraulic actuator and the moving sheave with a small amount of caulking.

Abstract: A fluid is guided inside a spool in which an orifice and drain holes are formed. The spool is displaced according to a hydraulic fluid pressure difference across the orifice. An outflow port, which is always connected with the orifice, and a drain passage, which overlaps with the drain holes according to a displacement position of the spool, are formed in the casing housing the spool. A stopper that limits the spool displacement beyond a position at which the overlap between the drain holes and drain passage is maximized is further provided. In this way, drainage of a fluid via the drain holes and drain passage is maintained at a maximum level even when fluid flows into the spool at a flow rate exceeding a predetermined level, and sharp increases of fluid flow rate from the orifice are thereby suppressed. By limiting excessive displacement of the spool, hysteresis is also prevented from occurring in the flow rate characteristics.

Abstract: In a metal V-belt type continuously variable transmission having a driving pulley and a driven pulley, the inclination angle .alpha. of a V-groove in the pulleys is set in a range represented by tan.sup.-1 .mu.a<.alpha.<tan.sup.-1 .mu.s, wherein .mu.s represents the static friction coefficient between the pulley and an endless belt, and .mu.a represents the dynamic friction coefficient between the pulley and the endless belt. In a conventional metal V-belt type continuously variable transmission, the inclination angle .alpha. is set in a range represented by .alpha.>tan.sup.-1 .mu.s. If the transmittable torque Tin is increased, the tensile force of the endless belt is increased to produce slipping between the endless belt and the pulley. However, according to the present invention, by decreasing the inclination angle .alpha. to reduce the tensile force of the endless belt, the transmittable torque Tin can be increased while preventing slipping of the endless belt.

Abstract: Rocker link elements (32, 33), which are located in pairs for connection of plate links (40), have end facing friction surfaces (43) which are essentially part spherical, for cooperation with essentially part spherical cone surfaces of cone disks (3, 4, 7, 8, 24-27). A base or central surface line is located approximately at a radial position of engagement with the end facing surfaces (43) of the rocker elements (32, 33) with the cone surfaces of the cones when the transmission is set for a transmission ratio of 1:1. To prevent engagement of edge regions of the rocker link elements with the respective cone disks, surface lines (54, 55) located radially outwardly, or inwardly, respectively, from a central surface line (49, 53), are inclined by an angle (.delta.), with respect to the base or central surface line. The angle of inclination (.delta.

Abstract: A belt-type automatic transmission wherein the engine brake can automatically work when a vehicle runs on a downward slope, comprising a pair of sheaves 21 provided on a driving shaft 20, the pair of sheaves 21 having a fixed sheave 22 and a movable sheave 23 which is caused to approach the fixed sheave 22 by the force which is increased with a revolution speed, a pair of sheaves 31 provided on a driven shaft 30, the pair of sheaves 31 having a fixed sheave 32 and a movable sheave 33 which is caused to approach the fixed sheave 32 by elastic force, a V belt 28 mounted around the pairs of sheaves 21 and 31, wherein the maximum opening between the sheaves 21 on the driving shaft 20 is restricted so as not to loosen the V belt 28, a clutch 15 for starting movement provided between an engine 1 and the driving shaft 20, and shift-up prevention means 40 for automatically giving the force for the movable sheave 33 to approach the fixed sheave 32 when revolving torque is transmitted from the driven shaft 30 to the pa

Abstract: A drive arrangement includes an endless flexible drive element which cooperates with a pulley of variable effective diameter having two sheave members and a drive ring between the sheave members and able to run eccentrically when the sheave members move apart. The drive arrangement also includes a stabilising member for cooperating with the drive ring so as to maintain the axis of rotation of the drive ring at least substantially parallel to the axis of rotation of the sheave members.

Abstract: A process is proposed to regulate a continuously variable transmission (2) with a clutch (9). The slip torque of the clutch is cyclically or anticyclically determined and the intensity of the clutch thrust is compared with a characteristic curve. This comparison sets a correction value used for modifying the characteristic curve.

Abstract: In a continuously variable transmission, a bolt hole of a casing and a female screw hole of a bearing fixing plate are arranged such that the bolt hole positionally corresponds to the female screw hole when an outer diameter portion of a bearing is engaged with a recess of the plate, and a pin of the plate is inserted into a positioning hole of the casing.

Abstract: Variable effective diameter pulleys comprise identical interleaved sheaves mounted on identical hubs that in turn engage balls in key ways or splines. A single helical spring within the pulley assembly urges the hubs apart to thereby increase the effective pulley diameter. The pulley design is symmetric about the central pulley plane perpendicular to the axis of the pulley. In one embodiment all of the pulley parts with the exception of the spring and balls are conveniently formed with simple sheet metal stampings. Permanent assembly requires only circumferential external welding or circumferential mechanical fastening near the periphery of each sheave. In another embodiment the stamped parts may alternatively be die cast or otherwise formed and welded together. Both embodiments of the pulley are particularly suited to automated assembly and mass production.

Abstract: A cam for axially shifting the pulley faces of a variable width, torque sensing V-belt pulley in a variable speed, belt-type transmission system. The cam includes a plurality of cam lobes that extend in an axial direction at a predetermined radial distance from the pulley axis. Each cam lobe is triangular and is symmetrical about a cam lobe axis that is parallel with the pulley axis, and each cam lobe includes two cam surfaces that engage with respective cam followers to change the pulley face spacing as the load on the belt changes. The cam surfaces are convex and are in the form of circular arcs. The transmission system incorporating the cam structure is particularly suitable for vehicular use, and it provides improved performance by reducing engine overspeed upon initial acceleration and provides a smoother backshift when climbing hills.

Abstract: A variable speed drive system for use with a self-propelled device is coupled by a belt to an engine which is mounted to the device. The variable speed drive system includes a variable pitch pulley held in spaced-apart relation to the drive shaft by a fixture and rotates about the drive shaft between a first position proximal to the engine and a second position distal to the engine. In the first position, the drive system is disengaged from the engine and the speed of the self-propelled device is zero, the belt being slack and providing no drive force to the drive system. In the second position, the drive system is moved a maximum amount about the drive shaft and is positioned to achieve a maximum speed. The drive system can also assume any intermediate position between the first and second positions, with the speed of the self-propelled device being determined by the amount of movement about the drive shaft toward the second position.