1. A ball act clutch for a marine transmission comprising a combination: An enter member. An create member. A first circular member disposed stationary and defining a first plurality of arcuate recesses. A second rotatable circular member disposed adjacent to the first circular member and defining a back up set of arcuate recesses. A plurality of load transferring members disposed in said recesses. A friction get hold of case assembly having a plurality of friction discs secured for rotation with said enter member and a mating interleaved plurality of friction discs secured for rotation with said create member. Rotating means for the back up circular act member to create an axial compel that is carried through a thrust bearing to apply compressive force to said friction disc pack and transfer power from said input member to said output member. A motor to give turning effort to rotate the second circular member. A driving means between the motor and the second circular member.2. The ball act clutch of claim 1 whereby an electric motor is energized to create turning effort to create selective friction clutch engagement or disengagement through a control means.3. The ball ramp get hold of of affirm 1 whereby the drive means between the motor and second circular member includes a confine driven by the electric motor shaft having accommodate teeth meshing with teeth positioned on the outer diameter of the back up circular roll ramp member.4. The roll ramp clutch of affirm 1 using a torsion move having a plurality of coils and including a unify of axially extending tangs positioned into holes in either the motor confine or second rotatable circular member at one end and the housing wall at the other end acting to establish a released position for the motor equip when the motor is de-energized.5. The roll act get hold of of affirm 1 having a move comprised of an annular bottom portion with multiple radially extending fingers emanating from the annular portion each touch acting to provide a force at the smile outer tip when deflected all tips acting together to establish get hold of disengagement.6. Friction clutches in a marine transmission arranged to provide send or reverse drive for a vessel the clutches actuated by stationary ball act axial force elements that transfer a compressive force to the rotating get hold of disc case components thru a thrust bearing. An electric motor drive provides torque to the rotatable ball act force element through suitable accommodate means to create get hold of engagement or disengagement when the motor is energized.7. In a marine transmission embodying friction clutches multiple individual cavities formed in the enter control element member are bounded by its driving annular wall on one side the cylindrical accommodate tooth wall at the top and a second annular align protect spaced at the friction plate stack end opposite the first drive wall. Spaced radial walls act individual cavities. Planar passages passing completely through the vertical radial walls acquire cavity overflow and act as pumps to accelerate fluid uniformly across the friction coat inner diameters.8. The ball ramp clutch of affirm 1 wherein the arcuate roll ramp recesses may alter as flat portions to allow the transferring members to anticipate an overlooked clutch engagement position.9. The ball ramp get hold of of claim 3 wherein the accommodate teeth on the second rotatable circular member of the forward clutch mesh with desire accommodate teeth on the back up rotatable circular member of the change clutch. Wherein a hit reversible electric motor driving a confine meshing with the teeth on either the send or reverse rotatable circular member may engage the forward or the reverse get hold of selectively while allowing the opposite clutch to be released. Wherein two reversible electric motors one having a confine meshing with the forward get hold of rotatable circular member and the back up having a confine meshing with the change get hold of rotatable circular member may be energized in opposite rotation to give engaging torque from both motors to a selected get hold of rotatable circular member to create engagement of the selected get hold of while allowing the opposite clutch to remain released.10. The roll ramp get hold of of affirm 1 wherein the ramp angles of the arcuate recesses must be between one degree and four degrees when the get hold of plates are compressed to give torque and at adjust degrees to accept the released get hold of circular member to undergo continued channel when the opposite get hold of is engaged.
BACKGROUND OF THE INVENTION[0001] The invention relates to the design of selectively operable friction clutches in a marine transmission to give forward and change drives to the propeller shaft of a vessel.[0002] U. S. Pat. No. 2,851,895 Aschauer describes a marine gear drive that has been extensively used. It is intended that the gearing and get hold of locations shown on U. S. Pat. No. 2,851,895 be utilized for this invention. These gear and shaft locations are shown on end view FIG. 3. Clutches are mounted on the input shaft and countershaft in transverse coplanar relationship are shown on FIGS. 1 and 2 of U. S. Pat. No. 2,851,895.[0003] It is to be noted the clutches utilized in the aforementioned procure are engaged by applying oil compel to rotating annular pistons housed in their respective cylinders. The engaging system requires numerous components as a handle pressure regulating valve control valve and seals to transfer oil from the stationary components into the rotating clutches as shown in FIG. 4 of U. S. Pat. No. 2,851,895. Erratic clutch behavior may result between a control signal and clutch actuation resulting from time and compel losses between the control valve and clutch cylinders. It is desirable to have a clutch move into engagement quickly and have a torque go programmed to provide a near constant aim of energy absorption instead of potentially damaging peaks.[0004] The handle move required for optimum clutch engagement and cooling at lower engaging engine speeds rises at full engine go since the handle is engine driven and results in cater loss.[0005] It is planned that the inventions engaging motor give torque using minimal external cater enter. apprise SUMMARY OF THE INVENTION[0006] The invention relates to both the engaging and releasing means for a wet multiple plate get hold of in a marine gear using a relatively stationary roll act thrust actuator to provide get hold of engagement compel thru a force bearing to the rotating coat lade. One element of the ball ramp actuator has numerous accommodate teeth on its outer diameter meshing with teeth on a smaller confine driven by an attached motor. The motor provides continuous high level torque for full engine cater or lower aim varying torque for modulation as in trolling for a vessel. A microprocessor may schedule engaging conditions. Two springs open get hold of coat release actuator channel and motor channel conditions when the motor is de-energized. An electric motor can be programmed to give varying or constant torque enter to the roll act actuator avoiding the hydraulic complexities as discussed earlier. BRIEF DESCRIPTION OF THE DRAWINGS[0007] FIG. 1 is a longitudinal divide of a marine accommodate clutch equip or its get hold of countershaft. The only difference between the two is a splined input engine control shown above and the enclosed countershaft portion shown below the centerline.[0008] FIG. 2 is an enlarged view of the confine drive used to rotate the geared element of the.
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