Super Shifter

Product Availability

There is approximately a 2-3 day delay between placing an order for this part and the part being shipped out from our location.

    

Product will include hardware for both pneumatic shifting and servo shifting (except the pneumatic cylinder is not included). The Super Shifter is shipped with the pneumatic shifting version installed and the hardware for the servo version packed in the hardware baggie.

This is a 2 speed shift-on-the fly gearbox, using a dog shifting method. Accepts 2 small CIM motors, 2 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.

5 improvements compared to the AM Shifter design:

1. An extra stage of reduction has been added. 2 gear sets are available to be used on this stage. A 2.25:1 reduction set (45 and 20 tooth gears) will be shipped with the gearbox, while a 2.82:1 (48 and 17 tooth gears) are available for purchase. This added stage allows for direct drive applications of 6" and 8" wheels.
2. 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.
3. Both the servo and the pneumatic shifting hardware is included with a Super Shifter, with the exception of the pneumatic cylinder.
4. A US Digital E4P-250-250 encoder is included and mounted to the final stage shaft, providing the ability for feedback. Also, the 4-wire encoder cable (US Digital CA-3285-1FT) with bare leads is provided, packed in the hardware baggie.
5. 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:

Servo: A Hi-Tech Servo, model HS-322HD (included) swings +/- 30 degrees is provided, rotating a fork that actuates the shift shaft between the 2 gear settings. This is a slow, weak method of shifting, taking about 1.5-2 seconds and pushing with approximately 5 pounds of force. A robot driver may need to back off of the throttle to let a servo shifter shift gears while moving.
Pneumatic: A Bimba cylinder (look to page 23 of that link), model 04-0.5-DP (not included) shifts between high and low gear. This is a 3/4" diameter bore, 1/2" long stroke air cylinder. This cylinder mounts with a 5/8-18 mounting nut. You will need to supply this nut separately or buy a 04-0.5-DXP cylinder, which is supplied with 2 mounting nuts. This is a very strong, fast method of shifting, lasting under 0.5 seconds and pushing with approximately 25 pounds of force. This pneumatic shift can be done while a robot is accelerating.

Weight:

4.6 lbs.

Hardware:

Shielded, flanged ball bearings
4140 steel 20 dp gears, w/ 14.5 degree pressure angle
1/4" thick aluminum side plates
encoder and servo included

Loose Hardware:

(shipped in a bag, with gearbox)
2 - CIM gears (12 tooth)
2 - 5/16" retaining clips
2 - 2mm x 2mm machine keys
4 - #10-32 screws
1 - servo w/ aluminum servo arm
1 - 1/4-28 screw for servo actuation
1 - 1/4" id, 1/2" long bushing for servo actuation
1 - 1/4-28 nut
6 - 5/16" id washer to space out CIM gear
1 - US Digital CA-3285-1FT encoder cable

Motor Input:

Designed for 2 (or 1) motor inputs.
FIRST kit 2.5" CIM Motor (1 or 2) or AndyMark AM Planetary gearbox (1 or 2), or a combination of these 2.
Motors are not included.

Additional parts

An output shaft with 2" in additional length will be available.
An output shaft from the shifting stage will be available, providing the option of not having the final reduction.
2" aluminum spacers will be available to install in place if the black box enclosure.
48:17 final stage gears will be available as additional parts.

Gear Reduction:

Many combinations can create numerous gear ratios.

STANDARD GEARING (this is what is shipped with a Super Shifter order)
Ratio between High and Low gears: 2.56:1
FINAL STAGE, w/ 45:20 GEARS:
Low Gear: 24.0:1
High Gear: 9.4:1

OPTIONAL "FINAL STAGE" GEARING,
FINAL STAGE w/ 48:17 TOOTH GEARS
Low Gear: 30.1:1
High Gear: 11.8:1
(not standard, but available as additional parts)

OPTIONAL "OUTPUT" GEARING,
New 4:1 high/low ratio Using 28 Tooth Small Output Gear and 35 Tooth Medium Cluster Gear, these ratios are available:
FINAL STAGE, w/ 45:20 GEARS:
Low Gear: 24.0:1
High Gear: 6.0:1
FINAL STAGE w/ 48:17 TOOTH GEARS
Low Gear: 30.1:1
High Gear: 7.5:1

New optional long Hex Shifting shaft

The Long SS Hex Shaft, listed as a non-standard part below, is available for users to have a longer shaft before the final ratio. The final ratio could even be removed in order for this structure to be similar to the gearing available in our AM Shifters.

Common parts

The Super Shifter uses some 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
Shift Block

Downloads

pdf Assembly drawings of both the pneumatic and servo style Super Shifter
stp CAD file of the servo setup for the Super Shifter
stp CAD file of the pneumatic setup for the Super Shifter