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US 4,294,338 AGranted
Transmission shift control apparatus with countershaft brake
AssigneeBorg-Warner Corporation
InventorJohn P. Simmons
Life of this patent
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AssigneeBorg-Warner Corporation
InventorJohn P. Simmons
Estimating the term…
Shift control apparatus for a multiple speed, sliding gear manual transmission is characterized by the provision of a main shift rail which is rotatable for crossover selection and axially slidable for engaging the selected gear. A synchronizing clutch/brake mechanism is axially slidable in one direction for engaging a forward speed ratio and in another direction for braking and releasing the transmission countershaft. A reverse idler gear is axially slidable in said one direction for engaging a reverse speed ratio. Linkage is provided for sliding the mechanism in said one direction upon axial sliding movement of the main shift rail in a first direction, and for sliding the mechanism in said other direction and the reverse idler gear in said one direction upon axial sliding movement of the main shift rail in a second direction.
Apparatus comprising a ground member, a shaft rotatable relative to said member, a sleeve rotatable with and slidable relative to said shaft, said sleeve defining a spline, at least one thrust-transmitting strut in break-away connection with said sleeve for rotational and sliding movement therewith, and a blocker ring in rotational lost-motion connection with said strut adjacent said member, said blocker ring defining blocker teeth rotatable into and out of alignment with said spline, said sleeve being slidable for sliding said strut into thrust-transmitting engagement with said blocker ring such that said blocker ring establishes frictional braking contact with said member and said blocker teeth rotate out of alignment with said spline, said blocker teeth being rotatable into alignment with said spline upon braking of said shaft such that said sleeve is further slidable to release said break-away connection and thereby release said shaft for further rotation.
In a synchronizing clutch/brake mechanism, a non-rotatable member, first and second rotatable members, first and second synchronizer elements drivingly associated with said first member and shiftable for establishing frictional contact respectively with said second and non-rotatable members, and drive means drivingly connected to said first member and shiftable in one direction relative thereto for sequentially establishing frictional synchronizing contact of said first element with said second member and a positive drive connection between said first and second members, said drive means being shiftable in another direction relative to said first member for sequentially establishing frictional braking contact of said second element with said non-rotatable member and release thereof.
In a transmission having a housing, a shaft rotatable relative to said housing, and a gear rotatable relative to said shaft;
In a multiple speed ratio power transmission having a housing, an input shaft, a countershaft, and an output shaft, gears defining a plurality of forward speed ratios and a reverse speed ratio selectively engageable for establishing torque delivery paths between said input and output shafts, and shift control means for selectively engaging said speed ratios;
A transmission comprising a housing, an input shaft, an output shaft, an input gear connected to said input shaft, first, second and third output gears rotatably supported on said output shaft, a fourth output gear secured to said output shaft, a countershaft, drive, first, second, third and reverse countershaft gears secured to said countershaft with said drive gear engaging said input gear and said first, second and third countershaft gears respectively engaging said first, second and third output gears, a fourth countershaft gear rotatably supported on said countershaft and engaging said fourth output gear, a first synchronizing clutch supported by said output shaft and including a first sleeve shiftable in first and second directions respectively for connecting said first and second output gears to said output shaft, a reverse output gear secured to said first sleeve, a second synchronizing clutch supported by said output shaft and including a second sleeve shiftable in said first and second directions respectively for connecting said third output gear and said input gear to said output shaft, a synchronizing clutch/brake supported by said countershaft and including a third sleeve shiftable in said first and second directions respectively for braking said countershaft and connecting said fourth countershaft gear to said countershaft, a reverse idler shaft, a reverse idler gear rotatably supported on said reverse idler shaft and shiftable in said second direction for engagement with said reverse countershaft gear and said reverse output gear, and means for shifting said first and second synchronizing clutches, said synchronizing clutch/brake and said reverse idler gear selectively in said first and second directions.
Apparatus comprising a non-rotatable member, a rotatable member, and means associated with one of said members and shiftable in one direction for sequentially establishing and releasing braking engagement of said members such that said rotatable member is sequentially braked and released.
A transmission comprising a housing, a shaft rotatable relative to said housing, and a brake mechanism, said brake mechanism including a cone secured to said housing, a sleeve rotatable with said shaft and slidable to a position spaced from said cone, a strut coupled to said sleeve by a break-away connection, and a blocker ring, said sleeve being slidable toward said position such that sequentially said strut effects frictional contact of said blocker ring with said cone to thereby brake said shaft and then said break-away connection yields to relieve said frictional contact and thereby free said shaft for rotation.
Dependencies are inferred from the claim text.