Product Overview
The Super Shifter includes hardware for both pneumatic shifting and servo shifting (the
pneumatic cylinder is not included). Hardware for the pneumatic shifting method is installed for shipment while the servo-shifting hardware is packed in the hardware baggie.
This transmission is a two-speed, shift-on-the-fly gearbox, using a dog shifting method. Motor input includes two
CIM motors, or two
AM Planetary Gearboxes or a combination of either. The output shaft is a 1/2" 4140 steel shaft with a 1/8" keyway. Two sets of reduction gears are available, while the ratio between high and low gear is 2.56:1.
Three differences compared to the AM Shifter design:
An extra reduction stage has been added. Two gear sets are available to be used on this stage. A 2.25:1 reduction set (45 and 20 tooth gears) is standard, while an optional 2.82:1 ratio, using (48 and 17 tooth gears) are available for purchase. This added stage allows for direct drive applications of 6" and 8" wheels.
The output shaft is extended from the side of the gearbox, as opposed to being captured within the side plates as on the AM Shifter transmissions.
A 2" long extruded aluminum box tube is used as a protective spacer, enclosing the gearbox. This is a safety improvement over the AM Shifter gearboxes.
Shift Style:
Two shifting methods are available for the Super Shifter. The pneumatic method is much stronger and faster than the servo method.
Pneumatic: A pneumatic cylinder, Bimba model 04-0.5-DP, 3/4" bore x 1/2" stroke, (not included) shifts between high and low gear. This cylinder mounts with a 5/8-16 nut (not included). This is a strong, fast method of shifting, lasting under 0.5 seconds and pushing with 26 pounds of force (if using 60 psi). This pneumatic shift can be done while a robot is accelerating.
Servo: A Hi-Tech Servo, model HS-322HD is included, using an actuation fork to shift between the 2 gear settings. This is a slow, weaker method of shifting (compared to pneumatic), taking 1.5-2 seconds and pushing with up to 8 pounds of force. A robot driver may need to back off of the throttle to let a servo shift gears while moving.
Weight
4.0 lbs., without motors or pneumatic cylinder installed
Hardware:
Shielded, flanged ball bearings
4140 steel 20 dp gears, w/ 14.5 degree pressure angle
1/4" thick aluminum side plates
encoder, cable and servo included
Loose Hardware:
(shipped in a bag, with gearbox)
Two - CIM gears (12 tooth)
Two - 5/16" retaining clips
Two - 2mm x 2mm machine keys
Four - #10-32 screws, for motor mounting
One - servo w/ aluminum servo arm
One - 1/4-28 screw for servo actuation
One - 1/4" id, 1/2" long bushing for servo actuation
One - 1/4-28 nut
Six - 5/16" id washer to space out CIM gear (3 for each motor)
One - US Digital CA-3285-1FT encoder cable
Encoder alignment
The encoder wheel fits on the back end of the
Wheel Shaft so that the outer face of the encoder wheel is aligned at the same level as the tips of the encoder clip posts, as shown in this picture:
Pictures for mounting the Servo Shifting hardware
Motor Input:
Designed for 2 (or 1) motor inputs
Use CIM motors or AM Planetary Gearboxes or a combination of both
Gear Reduction:
STANDARD GEARING
Ratio between High and Low gears: 2.56:1
FINAL STAGE, w/ 45:20 gear set
Low Gear: 24.0:1
High Gear: 9.4:1
OPTIONAL "FINAL STAGE" GEARING
(available as optional parts)
FINAL STAGE w/ 48:17 gear set
Low Gear: 30.1:1
High Gear: 11.8:1
OPTIONAL "OUTPUT" GEARING
(available as optional parts)
Ratio between High and Low gears: 4:1
Replace the standard 35 Tooth Small Output Gear (am-0023) and the standard 28 tooth Medium Cluster Gear (am-0025) with the 28 Tooth Small Output Gear and the 35 Tooth Medium Cluster Gear, to get these new output ratios below
FINAL STAGE, w/ 45:20 gear set
Low Gear: 24.0:1
High Gear: 6.0:1
FINAL STAGE w/ 48:17 gear set
Low Gear: 30.1:1
High Gear: 7.5:1
Optional Super Shifter output shafts
Long SS Wheel Shaft (output shaft, sticking out 3.94")
Long SS Hex Shaft: this is an extended intermediate shaft, used if the final stage is not needed
Hex SS Wheel Shaft provides a hex output shaft, if a FR8ZZ-Hex bearing is used.
Hex SS Long Wheel Shaft provides a longer hex output shaft, if a FR8ZZ-Hex bearing is used.
Weight Reduction
An aluminum Hex SS Wheel Shaft can replace the standard steel Wheel Shaft
Four 2" long spacers can replace the black box extrusion, but this exposes interior gearing.
Common parts
The Super Shifter uses many of the same fabricated parts as the AM Shifter (
Gen.1 or
Gen.2) transmissions:
CIM gears (12 tooth),
Large Cluster Gear,
Medium Cluster Gear,
Small Output Gear,
Large Output Gear,
Dog Gear, Cylinder plate, Shifter Shaft, and
Shift BlockLayout drawing
Print showing dimensions and shifting methods (.pdf)
CAD Files
These are in .stp format, right click and "save as", then open them in your solid modeling software.
Pneumatic Super Shifter with motors and air cylinder
Servo Super Shifter
Pneumatic Super Shifter with long 500 Key shaft
Pneumatic Super Shifter with hex output shaft
Pneumatic Super Shifter with long hex output shaft
