Gear cutting – milling – or planing – Milling – Including means to infeed rotary cutter toward work
Patent
1995-11-29
1996-10-22
Briggs, William R.
Gear cutting, milling, or planing
Milling
Including means to infeed rotary cutter toward work
408128, 474 72, B23Q 516, B23B 3900, F16H 700
Patent
active
055670946
ABSTRACT:
A speed change control mechanism including a motor for power output, a main shaft, a belt transmission mechanism driven by the motor to turn the main shaft, a gear box disposed at one side of the main shaft, the gear box comprising a gear shaft, a small gear slidably mounted around the gear shaft and stopped from rotary motion relative to the gear shaft, the small gear being moved into engagement with a big gear which is fixedly mounted around the main shaft, wherein a bearing means is fixedly secured to the small gear, a rack is fixedly mounted on the bearing means and meshed with a toothed shaft, the toothed shaft being rotated to move the small gear between the operative position, in which the small gear is engaged with the big gear of the main shaft for permitting the output power of the motor to be transmitted through the gear box to the main shaft for a low-speed milling operation, and the non-operative position, in which the small gear is disengaged from the big gear of the main shaft for permitting the output power of the motor to be transmitted through the belt transmission mechanism for a high-speed milling operation.
REFERENCES:
patent: 2145545 (1939-01-01), Johnson et al.
patent: 3718405 (1973-02-01), Keiter
patent: 5061124 (1991-10-01), Chen
Briggs William R.
Lei Alfred
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