Transmission
First Claim
1. A transmission comprising:
- an input shaft connected to a prime mover, and supported by a transmission-case member;
an output shaft arranged parallel to the input shaft and supported by the transmission-case member;
an input disk on the input shaft and whose outer peripheral edge is arranged in close proximity to the output shaft;
an output disk on the output shaft and whose outer peripheral edge is arranged in close proximity to the input shaft; and
a pair of pressure-application devices configured to be movable along a two-axes connecting line, interconnecting an axis of the input shaft and an axis of the output shaft, within a disk overlapping area that the input and output disks overlap with each other, and further configured to sandwich both outside faces of the input and output disks while applying contact pressure from the outside disk faces at a position corresponding to a required transmission ratio, for creating a torque-transmission contacting portion by elastic deformation of the input and output disks, the air of pressure-application devices comprising;
a biasing device for producing a biasing force from which the contact pressure exerted on the torque-transmission contacting portion of the input and output disks arises; and
a biasing-force adjustment device for adjusting the biasing force, produced by the biasing device, to produce the contact pressure of a pressure value suited to a shifting condition,wherein the pair of pressure-application devices is configured to sandwich the input and output disks while applying the contact pressure to the input and output disks at a selected position of one of a plurality of positions corresponding to finite transmission ratios ranging from a low-speed shift stage to a high-speed shift stage, the selected position corresponding to a required transmission ratio, and the biasing-force adjustment device is configured to reduce the biasing force, produced during shifting from a first shift stage of two consecutive shift stages to a second shift stage, to below both the biasing force produced at the first shift stage and the biasing force produced at the second shift stage.
1 Assignment
0 Petitions
Accused Products
Abstract
In a transmission having an input disk installed on an input shaft and an output disk installed on an output shaft, a pair of pressure rollers is provided to be movable along a two-axes connecting line of the axes of the input and output shafts, within a disk overlapping area that the input and output disks overlap with each other. The pressure roller pair is configured to sandwich the input and output disks while applying contact pressure from the outside disk faces at a position corresponding to a required transmission ratio, for creating a torque-transmission contacting portion by elastic deformation of the disks. A biasing device is provided for producing a biasing force from which the contact pressure arises. A biasing-force adjustment device is also provided for adjusting the biasing force to produce an appropriate magnitude of contact pressure suited to a shifting condition.
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Citations
7 Claims
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1. A transmission comprising:
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an input shaft connected to a prime mover, and supported by a transmission-case member; an output shaft arranged parallel to the input shaft and supported by the transmission-case member; an input disk on the input shaft and whose outer peripheral edge is arranged in close proximity to the output shaft; an output disk on the output shaft and whose outer peripheral edge is arranged in close proximity to the input shaft; and a pair of pressure-application devices configured to be movable along a two-axes connecting line, interconnecting an axis of the input shaft and an axis of the output shaft, within a disk overlapping area that the input and output disks overlap with each other, and further configured to sandwich both outside faces of the input and output disks while applying contact pressure from the outside disk faces at a position corresponding to a required transmission ratio, for creating a torque-transmission contacting portion by elastic deformation of the input and output disks, the air of pressure-application devices comprising; a biasing device for producing a biasing force from which the contact pressure exerted on the torque-transmission contacting portion of the input and output disks arises; and a biasing-force adjustment device for adjusting the biasing force, produced by the biasing device, to produce the contact pressure of a pressure value suited to a shifting condition, wherein the pair of pressure-application devices is configured to sandwich the input and output disks while applying the contact pressure to the input and output disks at a selected position of one of a plurality of positions corresponding to finite transmission ratios ranging from a low-speed shift stage to a high-speed shift stage, the selected position corresponding to a required transmission ratio, and the biasing-force adjustment device is configured to reduce the biasing force, produced during shifting from a first shift stage of two consecutive shift stages to a second shift stage, to below both the biasing force produced at the first shift stage and the biasing force produced at the second shift stage. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transmission comprising:
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an input shaft connected to a prime mover, and supported by a transmission-case member; an output shaft arranged parallel to the input shaft and supported by the transmission-case member; a primary disk stack constructed by a plurality of axially-arranged input disks which are installed on the input shaft and whose outer peripheral edges are arranged in close proximity to the output shaft; a secondary disk stack constructed by a plurality of axially-arranged output disks which are installed on the output shaft and whose outer peripheral edges are arranged in close proximity to the input shaft; and a pair of pressure-application devices configured to be movable along a two-axes connecting line, interconnecting an axis of the input shaft and an axis of the output shaft, within a disk overlapping area that the input and output disks overlap with each other, and further configured to sandwich both outside faces of the input and output disk while applying contact pressure from the outside disk faces within the disk overlapping area at a position corresponding to a required transmission ratio, for creating torque-transmission contacting portions of the input and output disks, arising from elastic deformation of the input and output disks, and further configured to shut off torque transfer from the input disks to the output disks by elastic recovery power of the input and output disks when the contact pressure is removed, the pair of pressure-application devices comprising; (a) a biasing device for producing a first biasing force from which the contact pressure exerted on the torque-transmission contacting portions of the input and output disks arises, the biasing device comprising a first mechanical spring device that produces a second biasing force acting in a direction for decreasing the contact pressure and a second mechanical spring device that produces a third biasing force acting in a direction increasing the contact pressure, the first biasing force being determined as a biasing-forcing difference between the third biasing force and the second biasing force; and (b) a biasing-force adjustment device for adjusting the first biasing force by varying the biasing-force difference to produce the contact pressure of a pressure value suited to a shifting condition.
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Specification