Headstock structure of computer numerical control milling and boring machine tool

Patent metadata

Field	Value
Publication number	US-10124453-B2
Application number	US-201615352493-A
Country	US
Kind code	B2
Filing date	Nov 15, 2016
Priority date	Nov 15, 2016
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A headstock structure of computer numerical control milling and boring machine tool comprising a spindle, a conducting slip ring, a rotating plate, a mobile unit, two balancing units, a driving unit, and a cutter locking unit; the conducting slip ring being sleeved on a top end of the spindle; the rotating plate being rotated in horizontal direction under the drive of the spindle; the mobile being rotated in horizontal direction together with the rotating plate; the two balancing units being located on the rotating plate; the driving unit being configured to drive the mobile unit to perform horizontal radial movement; the cutter locking unit being configured to lock the cutter, so that the headstock structure can rotate and move up and down, and can perform horizontal radial motion.

First claim

We claim:

1. A headstock structure of computer numerical control milling and boring machine tool comprising:
the headstock structure ( 100 ) comprising a spindle ( 1 ), a conducting slip ring ( 2 ), a rotating plate ( 3 ), a mobile unit ( 4 ), two balancing units ( 5 ), a driving unit ( 6 ), and a cutter locking unit ( 7 );
the conducting slip ring ( 2 ) being sleeved on a top end of the spindle ( 1 );
the rotating plate ( 3 ) being disposed below a lower end of the spindle ( 1 ) and rotated in horizontal direction under the drive of the spindle ( 1 );
the mobile unit ( 4 ) being disposed below the rotating plate and rotated in horizontal direction together with the rotating plate ( 3 );
the two balancing units ( 5 ) being located on the rotating plate ( 3 ), and on two opposite sides of the spindle ( 1 ) respectively;
the driving unit ( 6 ) being located on one side of the rotating plate ( 3 ) and the mobile unit ( 4 ), and configured to drive the mobile unit ( 4 ) to perform horizontal radial movement;
the cutter locking unit ( 7 ) being located under the mobile unit ( 4 ) and configured to lock the cutter;
wherein the mobile unit ( 4 ) comprises two symmetrically spaced mobile linear guideways ( 41 ) connected to the rotating plate ( 3 ) and a mobile plate ( 42 ) located under the two mobile linear guideways ( 41 ) which can be shifted at the two mobile linear guideways ( 41 ).

2. The headstock structure of computer numerical control milling and boring machine tool according to claim 1 , wherein the balancing unit ( 5 ) comprises a balancing linear guideway ( 51 ) corresponding to the mobile linear guideway ( 41 ) and a balancing weight ( 52 ) located on the balancing linear guideway ( 51 ) which can be shifted on the balancing linear guideway ( 51 ).

3. The headstock structure of computer numerical control milling and boring machine tool according to claim 1 , wherein the driving unit ( 6 ) comprises a servo motor ( 61 ) with a shaft ( 611 ) located on the rotating plate ( 3 ) and electrically connected to the conducting slip ring ( 2 ); a first belt pulley ( 62 ) connected to the shaft ( 611 ) for the servo motor ( 61 ) to drive; a driving screw set ( 63 ) located under the rotating plate ( 3 ); a second belt pulley ( 64 ) connected to the driving screw set ( 63 ); and a belt ( 65 ) located between the first belt pulley ( 62 ) and the second belt pulley ( 64 ) for the first belt pulley ( 62 ) to drive the second belt pulley ( 64 ).

4. The headstock structure of computer numerical control milling and boring machine tool according to claim 3 , wherein the driving screw set ( 63 ) comprises a driving screw ( 631 ); two fixed blocks ( 632 ) located on both ends of the driving screw ( 631 ) and connected to the rotating plate ( 3 ); and a mobile base ( 633 ) located at the driving screw ( 631 ) and connected to the mobile plate ( 42 ) for the driving screw ( 631 ) to drive the mobile plate ( 42 ).

5. The headstock structure of computer numerical control milling and boring machine tool according to claim 1 , wherein the spindle comprises a slot ( 11 ) disposed at one side of the lower end thereof for holding the servo motor ( 61 ); the slot ( 11 ) comprises at least one fixing component ( 12 ) disposed outside thereof for fixing the servo motor ( 6 ), and the fixing component ( 12 ) has a punch hole ( 121 ) corresponding to the shaft ( 611 ); the rotating plate ( 3 ) comprises a gap ( 32 ) disposed at one side thereof for keeping the rotating plate ( 3 ) balanced during rotation, the gap ( 32 ) being located between the first belt pulley ( 62 ) and the second belt pulley ( 64 ) for the belt ( 65 ) to go through.

6. The headstock structure of computer numerical control milling and boring machine tool according to claim 1 , wherein the rotating plate ( 3 ) comprises a gear set ( 31 ) respectively disposed on two opposite sides thereof; the mobile unit ( 4 ) located on both sides of the mobile plate ( 42 ) respectively includes first tooth rows ( 43 ) corresponding to a side edge of the gear sets ( 31 ); the balancing unit ( 5 ) located under the two balancing weights ( 52 ) respectively includes second tooth rows ( 53 ) corresponding to the opposite side edge of the gear sets ( 31 ) for the two balancing weights ( 52 ) to move together with the mobile plate ( 42 ).

7. The headstock structure of computer numerical control milling and boring machine tool according to claim 6 , wherein the gear set ( 31 ) comprises a plurality of follower gears ( 311 ) for connecting the first tooth row ( 43 ) to the second tooth row ( 53 ) and a plurality of driven gears ( 312 ) disposed between the two follower gears ( 311 ).

8. The headstock structure of computer numerical control milling and boring machine tool according to claim 1 wherein the mobile unit ( 4 ) comprises an optical scale ( 44 ) disposed at one side of the mobile plate ( 42 ) and paralleled with the mobile linear guideway ( 41 ), and electrically connected to a master control circuit of machine tool.

Assignees

• Wong Tsung Hua
• Ya Gui
• Li Wei

Inventors

• Wong Tsung-Hua
• Ya Gui
• Li Wei

Classifications

• B23Q11/0035

  by adding or adjusting a mass, e.g. counterweights · CPC title

• B23Q1/46 Primary

  with screw pairs · CPC title

• Y10T408/8598

  Screw extending perpendicular to tool-axis · CPC title

• B23B2260/088

  Indication scales · CPC title

• B23B2250/04

  Balancing rotating components · CPC title