Abstract: A conveyance device holds a sheet medium in a roll and includes a drive roller that feeds the sheet medium from the roll to a conveyance path; and a roll rotating unit that rotates the roll forward to convey the sheet medium toward the drive roller and in reverse to rewind the sheet medium and that has multiple drive modes with different speeds of rotation. A control unit controls driving the drive roller and the roll rotating unit, such that, when starting a reverse conveyance operation that rewinds the sheet medium, the control unit selects the drive mode to be used in the reverse conveyance operation based on a first conveyance distance, which is the distance the sheet medium is to be conveyed in the reverse conveyance operation, and the diameter of the roll stored as roll diameter information and as calculated after an immediately previous reverse conveyance operation.

Abstract: Among V-faces (48) of a pulley (15), a portion (48a) that is radially further inside than a predetermined position P1 is susceptible to slip against a metal belt (19), but making a shape of the generatrix of the portion (48a) on the radially inner side into a straight line enables a large coefficient of friction against the metal belt (19) to be ensured, thereby reliably preventing slip from occurring. Furthermore, by making, among the V-faces (48) of the pulley (15), a shape of the generatrix of a portion (48b) that is radially further outside than the predetermined position P1 into a curved line that curves in a direction that compensates for misalignment (C) of the metal belt (19) ensures that the metal belt (19) smoothly bites into the V-faces (48), thereby enabling the durability of the metal belt (19) or the pulley (15) to be enhanced.

Abstract: A transmission controller determines whether a shift is a kickdown, and when the shift is determined as the kickdown, the target line pressure is increased to a first target pressure corresponding to an input torque to a continuously variable transmission increased by the kickdown; the transmission controller then determines whether the line pressure has reached the first target pressure, and if determined that the line pressure has reached the first target pressure, the target line pressure is increased to a second target pressure higher than the first target pressure.

Abstract: Pulley assembly for a continuously-variable vehicle transmission, comprising a support element having an axis, a first half-pulley rotationally connected to the support element, a second half-pulley facing the first half-pulley to define a seating adapted to house a drive belt, the second half-pulley being axially and circumferentially mobile in relation to the support element, and cam means functionally inserted between the second half-pulley and the support element to control the position of the second half-pulley. The cam means define a plurality of circumferential cavities carried by a peripheral portion of the second half-pulley, said cavities being defined by the first and second sides which are transverse to axis, and comprise a plurality of cam-followers which are connected to the support element and housed in the corresponding circumferential cavities to cooperate selectively with the first and second sides.

Abstract: A system for a self-propelled vehicle with variable travel speed, such as a mowing tractor, includes, between the primary driving shaft of the vehicle and an output shaft, such as the wheel drive shaft of the vehicle, at least one controlled variable speed drive with a belt and controlled mechanism for reversing the direction of travel of the vehicle, the primary driving shaft transmitting, via the variable speed drive, its motion to the input shaft of the reversal mechanism, itself able to directly or indirectly engage the output shaft, such as the wheel drive shaft of the vehicle, in such a way as to allow the vehicle to travel forward or in reverse respectively, at a variable travel speed. This transmission system is characterized in that the variable speed drive and the mechanism for reversing the direction of travel of the vehicle are controlled selectively from the same control device.

Abstract: An electronic control V-belt continuously variable transmission mechanism is applied in a power transmission system having an engine and support shafts for a driving pulley and a driven pulley, characterized by driving the driving pulley with power supplied by a pulley driving system such that a movable portion of the driving pulley moves axially to the driving-pulley support shaft, thereby enabling a movable portion of a driven pulley connected to the driving pulley to move in response to the axial distance variation, thus changing the rotational speed of the driven pulley. The contact between a cam guide groove of a bearing base of the pulley driving system and a cam guide device is transmitted through rolling friction, and the transmission efficiency is increased by a complex lead angle effect formed between a lead angle of the cam guide groove and a lead screw.

Abstract: In a V-belt continuously variable transmission (CVT) of an ATV, a movable sheave half of a primary sheave is disposed on the outer side in the vehicle width direction with respect to a fixed sheave half, and a sheave drive mechanism for controlling the respective groove widths of the primary sheave and a secondary sheave through a driving force by an electric motor is located on the outer side in the vehicle width direction with respect to the movable sheave half of the primary sheave. A footboard of the ATV is located on the outer side of the V-belt CVT in the vehicle width direction and below a primary sheave shaft and a secondary sheave shaft. A portion of the electric motor is located above and in front of the primary sheave shaft as viewed in the sheave shaft direction. A straddle-type vehicle having the compact, yet durable V-belt continuously variable transmission achieves a speed change operation highly responsive to the vehicle running condition.

Abstract: A variable speed transmission of the continuously variable type. The transmission includes an input pulley having primary and secondary sheaves and an output pulley having primary and secondary sheaves. The primary and secondary sheaves of the input pulley are mounted on a first axle shaft carried by an actuator plate and the primary and secondary sheaves of the output pulley are carried on a second axle shaft carried by the actuator plate. The input shaft of the transmission carries pin mounted roller bearings which are received in skewed slots in an actuator sleeve so that the actuator sleeve is moved axially along the input shaft in response to variations in torque loading. The actuator plate is annular and includes a central circumferential groove receiving pin mounted roller bearings carried by the actuator sleeve so that the actuator plate, and the axle shafts carried thereby, undergoes the same axial movement as the actuator sleeve in response to variations in torque loading.

Abstract: The following steps are performed in the control method: determining a mode of operation from amongst a permanent mode and a transient mode, as a function of a set of variables comprising said estimated values; correcting the value of the speed of rotation of the outlet shaft in such a manner that: if the mode has been determined as being the permanent mode, then the moving average (L?) of the gear ratio (L) over a period (T) of a plurality of unit time intervals lies between a first threshold value (S1) that is negative and a second threshold value (S2) that is positive; and if the mode has been determined as being the transient mode, then said moving average (L?) of the gear ratio (L) lies outside the range of values defined by the first and second threshold value (S1, S2).

Abstract: A power transmission device for utility machinery is disclosed, the device including: a) a sleeve supporting a first sheave member having a first face; b) a hub received through said sleeve and moveable axially in relation thereto, said hub supporting a second sheave member having a second face that opposes said first face such that said first and second faces define therebetween a groove adapted to receive a belt and relative axial movement between said sleeve and said hub being adapted to vary at least one of pitch diameter and grip imparted to said belt from said sheaves; and c) an actuator mechanism adapted, through control of relative axial displacement between said sleeve and said hub, to vary at least one of said pitch and grip, said actuator mechanism comprising a control rod disposed substantially perpendicularly to the line of action of said axial displacement and connected to said hub through a link mechanism, said control rod being adapted to rotate and said link mechanism being adapted to transl

Abstract: A wind turbine variable speed transmission is provided. The wind turbine includes a rotor, an RPM amplifier coupled to the rotor and a variable speed transmission clutch coupled to the RPM amplifier. The wind turbine further includes a generator coupled to the variable speed transmission clutch and configured to generate power from a rotation of the rotor.

Abstract: A belt continuously variable transmission apparatus having a case which includes a power transmission case (which is part of a crankcase of an engine), a power transmission case cover, and an actuator cover assembled forwardly of the power transmission case cover (displaced forwardly on a vehicle body). The actuator cover is formed as a separate member from the power transmission case cover, and supports a motor for driving a movable part of a driving pulley. In addition, the actuator cover covers a gear system. The actuator cover is integrated with a cover of the water pump. The resulting configuration improves the assembling of the actuator cover of the belt continuously variable transmission apparatus.

Abstract: A hybrid power system, comprising a first power unit, a secondary shaft, a first transmission device, an auxiliary power unit, and a second transmission device. The first power unit has a primary shaft. The secondary shaft is driven by the primary shaft in a rotational movement. The first transmission device is placed between the primary shaft and the secondary shaft, having a transmission belt, transmitting torque from the primary shaft to the secondary shaft. The auxiliary power unit has an electric motor with a driving shaft, which is parallel to the primary shaft. The second transmission device is placed between the primary shaft and the driving shaft, transmitting torque from the electric motor to the primary shaft.

Abstract: A device for converting a rotational movement into an axial movement includes driven planetary rollers (10) and a sliding body (5) that can be axially displaced by means of the planetary rollers (10). The planetary rollers (10) are fixed axially in a driven carrier (9), are rotationally mounted and are provided with grooves (11). The grooves (11) of these planetary rollers (10) engage in a thread-type groove of the sliding body (5). In the center of the carrier (9) a bearing body (7) is provided, which engages in the grooves (11). The grooves (11 and 12) have a mutually adapted gradient, and the planetary rollers (10) and the bearing body (7) engage with one another without slip. Also the carrier (9) and the bearing body (7) engage with one another without slip. The carrier (9) and the bearing body (7) are driven in a rotational relationship, which guarantees that no slip occurs between the planetary rollers (10) and the sliding body (5).

Abstract: A belt type infinite variable-speed drive using a ball-screw mechanism is compact and noise-free. A nut of the ball-screw mechanism is fixed to a casing and a threaded shaft is rotatably coupled to a movable pulley member through a ball bearing so that ball circulating portions on the nut will not rotate while the movable pulley member is movable axially. Also, the ball circulating portions, which are low in load bearing capacity, are oriented in such a direction that a load hardly acts on the ball-screw mechanism. This makes it possible to compactly and rationally design a belt type infinite variable-speed drive and to suppress noise due to vibration of balls in the ball circulating portions.

Abstract: A method and apparatus for adjusting the torque output of a power train of a motor vehicle. An engine is connected to the input end of a continuously variable belt-type transmission. The output end of the belt-type transmission is operably connected to the drivable wheels of a motor vehicle. Open-loop torque control for the power train of the motor vehicle is effected based on specific operating states of the power train and the mechanical tension acting on the belt of the continuously variable belt-type transmission.

Abstract: A continuously variable transmission including a driving pulley, a driven pulley, an endless dry-type belt wound around both pulleys, a tension-adjusting device for pressing the slack side of the belt to generate belt tension, stroke mechanisms provided on both pulleys for axially shifting the movable sheaves, a ratio-changing motor, and a gear mechanism for transmitting the rotational force generated by the motor to both stroke mechanisms in such a way that the movable sheaves of both pulleys can be shifted synchronously and axially oppositely in relation to the fixed sheaves. With this arrangement, the belt is prevented from slipping, the transmission ratio can be controlled precisely and stably, and the shift-response of this transmission can be improved. The motor can be reduced both in its size and its consumption of electric power.

Abstract: A continuously variable transmission comprises a driving pulley (11), a driven pulley (21), an endless dry-type belt (15) wound around both pulleys, a tension-adjusting device (50) arranged between the driving and driven pulleys for pressing the slack side of the belt to generate belt tension, stroke mechanisms (14, 22) provided on the driving and driven pulleys respectively for axially shifting the movable sheaves depending on inputted rotational force, a ratio-changing motor (40), and a gear mechanism for transmitting the rotational force generated by the motor to both stroke mechanisms as well as for mechanically connecting both stroke mechanisms in such a way that the movable sheaves of both pulleys can be shifted synchronously and axially oppositely in relation to the fixed sheaves. With this arrangement, the belt is prevented from slipping, the transmission ratio can be controlled precisely and stably, and the shift-response of this transmission can be improved.

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: An indexing and braking mechanism for a manual transmission having a shifting mechanism and at least one rotatable drive shaft is disclosed. The mechanism includes an indexing mechanism for controlling movement of the shifting mechanism between at least a first position and a neutral position. The indexing mechanism has a plate having a plurality of notches formed thereon, wherein one notch corresponds to the first position and another notch corresponds to the neutral position. A locking mechanism is provided for selectively limiting movement of one of the at least one rotatable drive shaft. The locking mechanism is adapted to selectively engage the plurality of notches to selectively maintain the indexing mechanism in one of the first position and the neutral position. The locking mechanism includes an indexing lever having a projection extending from one side thereof. The projection is sized to be received within one of the plurality of notches.

Abstract: Disclosed is a continuously variable transmission in which when a shaft torque is secured by a belt friction force generated by externally pressing a pulley, difficulties of transmission and deteriorations of efficiency caused by short or surplus of the friction force of input and output pulleys are overcome, as a consequence of which the stable friction transmission with high efficiency and widened ratio range can be achieved. The continuously variable transmission includes a first transmission device performing higher efficiency in a big ratio range of the transmittable range than a second transmission device, the second transmission device performing higher efficiency in a small ratio range of the transmittable range than the first transmission device, and a switching device changeably selecting in the alternative the first and the second transmission devices, to combine with the big and small ratio ranges to enlarge an entire transmittable range while keeping high efficiency.

Abstract: A belt type infinite variable-speed drive using a ball screw is proposed which is compact and noise-free. The nut of the ball screw mechanism is fixed to a casing and the threaded shaft is rotatably coupled to a movable pulley member through a ball bearing so that ball circulating portions on the nut will not rotate while the movable pulley member is movable axially. Also, the ball circulating portions, which are low in the load bearing capacity, are oriented in such a direction that load hardly acts on the ball screw mechanism. This makes it possible to compactly and rationally design a belt type infinite variable-speed drive and to suppress noise due to vibration of the balls in the ball circulating portions.

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: In a constant-horsepower transmission having a primary pulley, a secondary pulley and a belt extended between the primary and the secondary pulley, a predetermined frictional force acting between the pulley and the belt is secured by an external instruction, and the pulley is capable of automatic alignment and shock absorption to ensure stable power transmission from the belt to the pulley. A first compressing device compresses an elastic device in response to an external instruction, a first pressing device including the elastic device applies a pressure and an elastic force produced by the compressed elastic device to the belt through the pulley. A predetermined frictional force is secured by the pressure and stable power transmission is insured by the elastic force. A first pressure application controller executes a variable pressure application control operation to apply an optional pressure to the belt by displacing or not moving the movable disk of the pulley.

Abstract: A vehicle drive assembly includes a directional control transmission assembly and a variable speed drive assembly. A transmission drive belt extends between the variable speed drive assembly and the directional control transmission assembly to transmit force from the variable speed drive assembly to the transmission assembly when the transmission assembly is in a forward drive condition and when the transmission assembly is in a reverse drive condition. A main drive belt extends between the variable speed drive assembly and a source of power to transmit force to the variable speed drive assembly. The drive assembly includes a linkage assembly operable to move the variable speed drive assembly toward the directional control transmission assembly to change the variable speed drive assembly from a first condition in which the directional control transmission assembly is driven at a relatively low speed and a second condition in which the directional control transmission assembly is driven at a high speed.

Abstract: In a power transmission device of an engine, an opening 37 is formed in a gear case 36 to allow an output shaft 11 to be pulled out of the gear case 36 from one end of the output shaft 11 toward the other end thereof. A lid member 33 is removably attached to the gear case 36 such that it covers the opening 37. The first support member 13 is removably attached to the gear case 36 for rotatably supporting the output shaft 11. A first shim 15 is interposed between the first support member 13 and the gear case 36. A second support member 23 is removably attached to the gear case 36 for rotatably supporting the drive shaft 21. A second shim 25 is interposed between the second support member 23 and the gear case 36.

Abstract: A variable ratio belt drive of the type in which each pulley has an axially movable pulley half for varying the effective drive diameter and speed ratio in a continuous, stepless manner. The drive includes a primary control assembly in one pulley having a threaded interconnection between the drive shaft and one of the pulley halves for effecting a change in the drive diameter upon application of a brake band to a collar mounting the pulley half. In one preferred embodiment, two collars and two brake bands are provided while in another, only a single band and collar is used. The other pulley is provided with a secondary control assembly which automatically responds to the primary control assembly and preferably includes cam means for precluding belt slippage.