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Motor and reducer

Part of the Drivetrain section. Motor + belt drive + reducer mounting and the primary vibration/torque input to the machine.

Introduction

This subassembly defines the motor/reducer selection, belt drive layout, and mounting/tensioning approach. It sets the drivetrain’s radial loads (from belt tension), vibration into the frame, and the reducer output torque that drives the gear train.

Catalog links

• WEG W22 IEC TEFC catalog (IE2) — WEG catalog listing
• Sumitomo Cyclo 6000 catalog (PDF) — Sumitomo PDF

Colour key & components

Key components; colours may differ between figures. Primary intent is to specify interfaces and what contractors must validate.

Figures

Motor/reducer figures are currently shown in the Drivetrain main gallery. Add dedicated closeups here later (pulley alignment, tensioning travel, mounting features).

Discussion

Rough design & intent

• Primary goal — Deliver stable reducer output torque to the gear train while keeping belt tensioning, pulley alignment, and vibration manageable.
• Mounting orientation — Current concept mounts the motor with its shaft pointing vertically downward, and the reducer input shaft is also oriented vertically downward. A belt transfers power between these vertical shafts.
• Major unknown — Belt center distance and tensioning mechanism must be finalized because it sets bearing radial loads, vibration, and stiffness requirements on the mount plate.

Known issues & risks

• Radial loads from belt tension — Contractor must quantify belt tension and resulting radial loads on motor and reducer shafts.
• Vibration — Motor/reducer vibrations transmit into the frame; mount stiffness and damping/isolation must be considered.
• Shaft extensions — Machine layout requires extending reducer input/output shafts; contractor to propose a safe, manufacturable extension/adaptor approach and tolerances.
• Belt guard not designed — A pulley/belt guard is required; mounting rails/structure on the back of the machine may be needed to support guarding.

DFM & manufacturing (China)

• Mounting — Recommend a motor/reducer mounting that supports easy belt tensioning and pulley alignment check.
• Guarding — Provide a practical pulley/belt guard that is safe yet removable for maintenance.
• Tensioning concept — Current owner concept is a “standoff stud adjustment” mount: motor sits on multiple through-studs/bolts with stacked nuts/washers (nut below plate, nut/washer above plate, motor foot, nut above foot) so motor position can be adjusted for belt tension. Contractor to propose a cleaner and more robust alternative if preferred.

Questions for contractor

1. Propose a belt tensioning design (center distance, adjustment travel, locking method) and provide belt tension/radial load estimates.
2. Confirm the exact Cyclo 6000 model/ratio required for ~70 rpm output and provide mounting/lubrication requirements.
3. Propose input and output shaft extension/adaptor design(s) (materials, fit classes, keying/splines, runout targets) and an assembly/inspection plan.
4. Evaluate an alternative architecture: mount the motor in a conventional orientation and use a right-angle/angle gearbox to drive the vertical reducer input. Would this improve vibration, service, or safety? Provide trade-offs and sourcing options.
5. Propose a guarding concept for the belt/pulleys that can be mounted on the back of the machine (what rails/brackets are needed and how it is removed for maintenance).

Interfaces and tolerances

Known interfaces and tolerances. Links go to related subsystems.

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