William Nawky Snowmobile Auction

Primary Clutch

Adaptable layshaft type gearbox using a planetary gearset

A gearbox comprises parallel primary or input and secondary or output shafts in a casing. An output gear train of two constant-mesh gearwheels is fastened to the secondary shaft.

An independent input gear train of four constant-mesh gearwheels and a first and a second clutch are mounted on the primary shaft. A third clutch is mounted on the secondary shaft. The first and third clutches respectively couple the input train to the primary shaft and to the secondary shaft.

Three-element planetary gearset concentric with the primary shaft comprises a sun gear fastened to the input train, a planet carrier coupled to the primary shaft by the second clutch and a ring gear fastened to the output train. Thus the gearbox features three gear ratios by respective combinations of pairs of the three clutches. This arrangement constitutes a basic gearbox.

More complex gearboxes derived from the basic gearbox comprise a supplementary gear train and a fourth clutch and/or a first brake and/or a second brake for respectively driving and/or immobilizing the sun gear and/or the planet carrier. This provides numerous additional forward and reverse gear ratios that are always well distributed and easy to control.

It is known to implement such gearboxes with a small number of gear ratios, for example two or three forward gear ratios--one of which is generally a direct drive--and one reverse gear ratio, with a primary shaft and a secondary shaft, a geartrain and a clutch for each gear ratio, and a separate special gear for the reverse gear ratio.

Such gearboxes are simple, rugged and efficient and of acceptable cost and overall size, but their performance remains somewhat limited and more often than not the reverse gear ratio is somewhat perfunctorily implemented by means of a dog typesystem.

Similarly, it is known to implement gearboxes with a larger number of gear ratios, for example four forward gear ratios and two or four reverse gear ratios, by combining two ranges of two gear ratios and one reversing unit, or with three forwardgear ratios and three reverse gear ratios, or again with five forward gear ratios and one reverse gear ratio, etc.

Such gearboxes are still rugged and efficient but entail multiple layshafts and clutches so that their complexity, cost and overall size increase out of proportion to the number of gear ratios if an adequate level of performance is to beachieved. Also, in dual range gearboxes changing the range entails a shifting sequence that is no longer a single operation but a double operation--that is to say involving the simultaneous control of four clutches instead of two--resulting in muchgreater variations in inertia and much more serious problems in controlling the shifting, while the steps in the gearbox are precisely the same in both ranges, imposing gear ratio distributions that are often inappropriate.

Finally, and in a general way, these known gearboxes do not have any braked neutral setting, that is to say a combination in which the input to the gearbox is free and the output is immobilized, corresponding to the specific case where the ratiobetween the output speed and the input speed is equal to zero. The advantages of this type of combination, which is lacking in the types of gearbox under discussion, are specifically to permit immobilization of the vehicle with the motor running,notably during momentary stops imposed by traffic conditions, without needing to constantly apply the brakes of the vehicle, to guarantee good control over and continuity of changes between the forward gear ratios and the reverse gear ratios onreversing, and so on, all these factors tending to increase significantly driver comfort.

The object of the present invention is thus a gearbox retaining the original qualities of simplicity, ruggedness and efficiency of the known gearboxes with few gear ratios mentioned above, but also featuring, with a minimum of components andacceptable cost and overall dimensions, an increasing number of forward and reverse gear ratios that are always well distributed, a braked neutral setting in addition to the conventional unbraked neutral setting, and shifting sequences that always entailsingle operations only from one end to the other of the range--that is to say from the highest reverse gear ratio to the highest forward gear ratio--lending itself perfectly to any kind of control system.

Depending on whether the speed ratio of the input train between the sun gear and the planetary gearset and the first clutch is less than, equal to or more than unity, the third gear ratio is respectively an overdrive ratio, a direct drive ratioor a less than one-to-one ratio, in this context direct drive meaning rotation of the planetary gearset as a whole.

This gearbox is the basic gearbox. In accordance with another feature of the invention, this gearbox is adaptable and has provision for implementing a whole series of highly standardized gearboxes with increasing numbers of gear ratios, bysimple addition of minimum additional components, as will now be explained.

By adding to the basic gearbox a first brake for immobilizing the sun gear and/or a second brake for immobilizing the planet carrier the gearbox is respectively provided with a fourth gear ratio and a first braked neutral setting by combinationof the first brake with the second and third clutches, and/or a reverse gear ratio and a second braked neutral setting by combination of the second brake with the first and third clutches, and a third braked neutral setting by combination of the firstbrake with the second brake.

When the gearbox has four forward gear ratios and one reverse gear ratio, for example, the first and third forward gear ratios and the reverse gear ratio are subject to slip whereas the second and fourth forward gear ratios are not subject toslip.

About the Author

Zhongyi Hydraulic Motor Company is a professional engaged in gearbox,radial piston motor,axial piston motor,piston motor,slewing transmission,danfoss motor,hydraulic orbital motor,hydraulic steering,hydraulic steering unit,hydraulic winch.All products are strictly tested before delivery by testing bench and comprehensive testing facilities to ensure the quality.

Traxxas Primary Clutch Assembly TRA5390 $28.98 Traxxas replacement primary clutch assembly for the Revo. This part is located within the twospeed transmission. Constructed of aluminum and steel. One 2 x 9.8mm pin and one 6 x 8 x 0.5mm washer are included.

Clutch $119 Clutch

Chrome Vented Primary Cover $279.95 Drag Specialties Chrome Vented Primary Cover For use with belt drive systems that fit in stock primary covers Custom look for your bike Increased airflow keeps the clutch and belt cool for longer life Uses three-hole derby cover

Primary Case Lubricant Oil $11.99 100% Synthetic Primary Case Lube specifically designed for Harley-Davidson motorcycles. Advanced additives reduce clutch and fluid drag while lubricating gears, sprockets, chains and all critical primary case components. Superior film strength for greater protection against shock loads. Ester Synthetics provide decreased operating temperatures.

Primary Chaincase Lubricant $9.99 Bel-Ray Primary Chaincase Lubricant Bel-Ray Primary Chaincase Lubricant is premiumy motorcycle oil specially formulated for the primary chaincase of all big twin motorcycles. Ideally suited to stand up to high pressures, its exclusive Bel-Ray antiwear chemistry ensures long service life for the primary chain. Superior oxidation protection for extended performance, and prevents clutch slipping and chatter for consistent engagement. Distinctive red color makes it easier to detect leaks in multiple lubrication cavity engines. Formulated for primary chains and wet clutches Wear protection extends primary chain life Prevents clutch slipping and chatter for consistent engagement Distinctive red color for leak detection For Big Twin, air-cooled / liquid-cooled primary chaincases

Scorpion Billet Clutch $494.99 Barnett Scorpion Billet Clutch Twice the friction area of your stock clutch with positive engagement and release CNC-machined from billet aluminum Designed to use six heavy-duty coil springs instead of a diaphragm spring to handle increased horsepower Friction plates are compatible with any primary oil No machining necessary for installation; bolt it on using the original clutch shell Kits include clutch hub, drive plates, , driven platestwo sets of clutch springs, pressure plate and necessary hardware **Note: 00-06 FLST/FXST and 99-06 FLT?models with OEM hydraulic clutch

Primary Chaincase Lube $12.99 V-Series Primary Chaincase is a selective blend of synthetic and petroleum based fluids designed to protect all critical drive components found in Harley? and aftermarket chaincases. Provides the highest degree of protection and smooth, positive clutch operation. Features: Synthetic blend technology Excellent shock load and extreme pressure protection Provides smooth, positive clutch activation Superior anti-rust and oxidation protection

2107 16t Clutch bell $4.23 Clutch

86040 clutch chip unit $5.64 clutch

Primary $6 Primary - Diane Birch

Jalda Deniz Clutch Clutch $235.39 Jalda Deniz Clutch Clutch

Norton Primary Drive Locking Bar - FL. Each $32.63 Manufacturer: Norton. Each. Features and Benefits: This tool is used to lock the primary chain for removal and installation of the sprocket and clutch nuts Fits: all 4 speed Big Twins and 5 speed FXST models Black Oxidized finish Made in the U.S.A. 2 ye

50029 Clutch Bell Bush for V1 or V2 only $4.87 Clutch

50029N Clutch Bell Bush for V3 only $29.89 Clutch

Clutch Bell $26.1 Clutch Bell

Clutch Shoes $7.25 Clutch Shoes

Clutch Rod $17.99 Clutch Rod;

Whiting & Davis The Edge Clutch Clutch $210 Whiting & Davis The Edge Clutch Clutch

Jalda Original Clutch Chain Clutch $250 Jalda Original Clutch Chain Clutch

Rebecca Minkoff Beau Clutch Clutch $395 Rebecca Minkoff Beau Clutch Clutch

Norton Primary Drive Locking Bar - Big Twins. Each $33.21 Manufacturer: Norton. Each. Features and Benefits: This tool is used to lock the primary chain for removal and installation of the sprocket and clutch nuts Fits: 5 speed FXR and FLT Big Twins Black Oxidized finish Made in the U.S.A. 2 year manufacturers

Norton Primary Drive Locking Bar - Twin Cam. Each $33.21 Manufacturer: Norton. Each. Features and Benefits: This tool is used to lock the primary chain for removal and installation of the sprocket and clutch nuts Fits: 2006 Dyna and 2007 Twin Cam Black Oxidized finish Made in the U.S.A. 2 year manufacturers d

Northcoast Tool NCT5611T Primary Drive Locking Bar Twin Cam $51.3 This tool is used to lock the primary chain for removal and installation of the sprocket and clutch nuts. Fits: 2006 Dyna and 2007 Twin Cam. Black Oxidized finish. Made in the U.S.A. Dimension: 9 L x 7 W x 0.5 H.

Northcoast Tool NCT5611B Primary Drive Locking Bar Big Twins $51.3 This tool is used to lock the primary chain for removal and installation of the sprocket and clutch nuts. Fits: 5 speed FXR and FLT Big Twins. Black Oxidized finish. Made in the U.S.A. Dimension: 9 L x 7 W x 0.5 H.

Northcoast Tool NCT5611F Primary Drive Locking Bar FL $51.3 This tool is used to lock the primary chain for removal and installation of the sprocket and clutch nuts. Fits: all 4 speed Big Twins and 5 speed FXST models. Black Oxidized finish. Made in the U.S.A. Dimension: 9 L x 7 W x 0.5 H.

Primary Fear $10.49 Primary Fear

Primary Colours $4.49 Primary Colours

Primary Transmission $7.49 Primary Transmission

Primary Colors $4.99 Primary Colors