Chapter 5 Installation
51
5.2.3. Installing the motor
Install the motor with an attached input gear in the
reduction gear already mounted with the motor
mounting flange. The following is an installation
example when sealing the input gear with an oil seal.
Perform steps 1 to 3 by taking care regarding the
following precautions.
• Attach an oil seal to the motor mounting
Step 1
flange.
• Install the input gear on to the motor shaft, and then directly insert the motor into the reduction
Step 2
gear.
• Do not forcibly press down on the motor.
• Take extra care so that the gear section of the input gear does not scratch the lip surface of the oil
seal.
• Take extra care so that no scratch will be made on the gear section due to interference between the
input gear and spur gear.
• For the product with two spur gears, insert the motor so that the input gear is in the correct position
as illustrated in Fig. 5-37 “Correct built-in position”. Then, confirm that the motor and motor
mounting flange are closely attached with each other without any tilt. If there is a clearance
between the motor and motor mounting flange surface, the motor could be in an incorrect position
as illustrated in Fig. 5-37 “Incorrect built-in position”. Do not tighten the bolt to eliminate the
clearance.
If the motor is forcibly pressed down, it could damage the input gear, spur gear, and motor.
If the gear section of the input gear scratches the lip surface of the oil seal, it could cause leakage of
the lubricant.
If the gear section is scratched due to interference between the input gear and spur gear, it could
cause abnormal noise.
• Using the hexagon socket head cap screw, fix the motor to the motor mounting flange.
Step 3
• Confirm that the centering shaft of the motor is correctly fitted into the centering hole of the motor
mounting flange.
• Check that there is no foreign matter adhering to the mounting surface.
Note
Fig. 5-37
Correct built-in
position
Incorrect
built-in position
