Continuously variable transmission

A continuously variable transmission including:

• an input pulley and an output pulley each having a movable disk and a fixed disk mounted on an input shaft and an output shaft, respectively;
• an endless V-belt extended between said input pulley and said output pulley;
• a first operating unit applying a pressing force to one pulley of said input and said output pulleys;
• a second operating unit applying an elastic force to the other pulley of said input and said output pulleys;
• first and second elastic devices individually compressed in series in said first and second operating units, respectively, to supply individually an elastic force to said input and output pulleys;
• said first operating unit capable of applying a control elastic force of a predetermined value or a controllable and arbitrary value passing through said first elastic device simultaneously and in parallel with said movable disk of said one pulley upon supply of said pressing force;
• and
• a controlling device carrying out a high efficient transmission between said input and output pulleys to a portion or a whole of a variable speed ratio area in accordance with supplying of said control elastic force and said elastic force applied individually thereto via said first and second operating units.

A continuously variable transmission including:

• input and output pulleys each having a movable disk and a fixed disk mounted on input shaft and output shafts, respectively, and an endless V-belt extended between said input and output pulleys;
• input and output pressing devices supplying a pressing force to one of said input and output pulleys, and an elastic force to another thereof;
• input and output elastic devices having an input and an output elastic member for supplying an elastic force to said input and output pulleys;
• a driving source for driving said input and output pressing devices synchronously or asynchronously;
• a controlling device applying individual pressing instructions to said input and output pulleys via said driving source;
• and
• switching means for switching and supplying an elastic force to said another pulley upon supply of a pressing force to said one of said pulleys, or switching and supplying the pressing force to said another pulley upon supply of the elastic force to said one of said pulleys.

A continuously variable transmission including:

• an input pulley and an output pulley applied to an input shaft and an output shaft, respectively, and each comprising a movable disk and a fixed disk;
• an endless V-belt applied between said pulleys disposed in a direction reversed to each other on said respective shafts;
• input and output operating units in which input and output compressing devices provided on input and output pressing devices correspond and for displacing said movable disk of each of said pulleys by a driving source;
• input and output elastic devices in which said input and output pressing devices have input and output elastic members for supplying an elastic force to each other said pulleys;
• said input and output pressing devices which have first input and output pressing devices for applying a pressing force not through said elastic member by each said compressing device, and second input and output pressing devices for applying an elastic force via said elastic member by each said compressing device, said input and output pressing devices distinguishing and supplying the elastic force or the pressing force to said movable disk of each pulley;
• a first transmitting device for applying a follower function to said input pulley in said second input pressing device and a reference function to said output pulley in said first output pressing device, respectively, by the operation of said operating units;
• a second transmitting device for applying the reference function to said input pulley in said first input pressing device and the follower function to said output pulley in said second output pressing device, respectively, by the operation of said operating units;
• switching means for alternatively switching said first transmitting device and said second transmitting device;
• and
• a controlling device synchronously switching both said operating units to operate said first transmitting device in the predetermined area of a variable speed area, and said second transmitting device in another area except said predetermined area thereof, respectively.

A continuously variable transmission including:

• an input pulley and an output pulley applied to in input shaft and an output shaft, respectively, and comprising a movable disk and a fixed disk;
• an endless V-belt applied between said pulleys disposed in a direction reversed to each other on said respective shafts;
• input and output operating units in which input and output pressing devices move said corresponding movable disk of each of said pulleys by a driving source;
• an individual pressing device which has a first pressing device for a first compressing device to press in series a contact device and apply a reference function caused by the pressing force corresponding to said pulley, and has a second pressing device for a second compressing device to press in series an elastic device and apply a follower function provided by the elastic force corresponding to said pulley, said individual pressing device switching and supplying the respective functions to the corresponding pulleys in accordance with a control instruction;
• a composite pressing device in which the contact device and the elastic device are pressed in series by a single compressing device and are further connected in parallel with each other, and said contact device causes a compressive displacement of said elastic device to be impossible at the time of contact motion and possible at the time of release of the contact, to distinguish and supply the pressing force or the elastic force to the corresponding pulley in accordance with the control instruction;
• said input and output operating units in which one of said input and output pressing devices is composed of said individual pressing device and the other is composed of said composite pressing device;
• and
• a controlling device for controlling the switching in order that one pulley of said input and output pulleys has a follower pulley function when the other pulleys has a reference function.

A continuously variable transmission including:

• an input pulley and an output pulley applied to an input shaft and an output shaft, respectively, and each comprising a movable disk and a fixed disk;
• an endless V-belt applied between said pulleys disposed in a direction reversed to each other on the respective shafts;
• input and output operating units in which input and output pressing devices move said corresponding movable disk of each of said pulleys by a driving source;
• an individual pressing device applying pressure to said movable disk of said input or output pulleys, including:
• a first pressing device for always applying an elastic force generated by pressing in series an elastic device by a first compressing device to impart a follower function caused by a variable pressing control to the corresponding pulley movable disk;
• and
• a second pressing device for applying a pressing force generated by pressing in series a contact device by a second compressing device at the time of a speed change to impart a reference function caused by a variable pitch positioning control for said V-belt to the corresponding pulley movable disk;
• said input or output operating units having an individual pressing device comprising said first and second pressing devices in order to supply one or both of the pressing force and the elastic force to said input or output pulley;
• and
• a controlling device applying control and switching instructions of the reference function or the follower function to each said operating unit in order that the other provides the follower function when one of said corresponding pulleys provides the reference function.

A continuously variable transmission including:

• an input pulley and an output pulley applied to an input shaft and an output shaft, respectively, and comprising a movable disk and a fixed disk;
• an endless V-belt applied between said pulleys disposed in a direction reversed to each other on the respective shafts;
• input and output operating units to which input and output pressing devices press and displace the corresponding movable disk of each of said pulleys by a driving source;
• a composite pressing device having an elastic pressing device for pressing in series a compressing device and an elastic device to supply an elastic force, and a non-elastic pressing device for pressing in series said compressing device and a contact device to supply a pressing force;
• wherein a compressive displacement of said elastic device connected in parallel with said contact devices is impossible at a time of contact motion and possible at a time of release of the contact motion to distinguish and supply at least the pressing force and the elastic force;
• said input or output operating units at least driving said composite pressing device for distinguishing the pressing force or the elastic force according to a control instruction relative to said input or output pulley to switch and supply a reference function or a follower function, so as to give one of said input and output pulleys the reference function and the other the follower function;
• and
• a controlling device supplying variable control instructions to said respective operating units.

A continuously variable transmission for transmitting between an input shaft and an output shaft, comprising;

• a first variable transmission device arranged such that a first operating unit individually controlling and giving one of two variable pitch pulleys a pressing force and the other an elastic force, variably press-controls a first transmitting device including said two variable pitch pulleys each having at least a movable disk, and an endless belt, so as to perform higher efficiency in a first speed ratio range than a second variable transmission device;
• said second variable transmission device arranged such that a second operating unit individually controlling and giving one of two variable pitch pulleys a pressing force and the other an elastic force, variably press-controls a second transmitting device including said two variable pitch pulleys each having at least a movable disk, and an endless belt, so as to perform higher efficiency in a second speed ratio range than said first variable transmission device;
• a switching device alternatively selecting said first and said second variable transmission devices to widen an entire transmittable range while keeping high efficiency by combining with said first speed ratio range and said second speed ratio range between said input and output shafts;
• and
• a controlling device giving said first and second operating units control instructions and giving said switching device a switching instruction.