Work machine

Patent metadata

Field	Value
Publication number	US-10052729-B2
Application number	US-201214411323-A
Country	US
Kind code	B2
Filing date	Jun 25, 2012
Priority date	Jun 25, 2012
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A work machine includes: a bed having a table positioned on the upper surface thereof; sidewalls positioned to the left and right of the bed and projecting to the rear of the rear surface of the bed; support members for each supporting the bed in relation to a floor surface by using two points on the sidewalls to the left and right of the bed, and using at least one other point; a vertically moving body for moving along a pair of left and right vertical guides positioned in the vertical direction down to the vicinity of the floor surface on the rear surface of the bed; and a vertical drive means for moving the vertically moving body as one of the abovementioned relative movements, and having a pair of left and right feed screws positioned in parallel with the vertical guides.

First claim

The invention claimed is:

1. A machine tool for machining a workpiece, which is attached to a table, by moving a tool attached to a spindle and the workpiece relative to each other, the machine tool comprising:
a bed providing a base and defining a top to which a table is disposed;
a pair of left and right side walls for the bed extending rearward from a rear side of the bed;
a front supporting member disposed at a center of a front side of the bed so as to support the bed on a floor, the front side of the bed being perpendicular to an axial direction of the spindle and facing a tip of the spindle, and the rear side being perpendicular to the axial direction of the spindle and being opposite from the front side;
rear supporting members disposed at rear ends of the left and right side walls so as to support the bed on the floor, the rear ends of the side walls being ends of the side walls at the rear side of the bed;
a vertically moving body moving vertically along a pair of left and right vertical guides mounted to the rear side of the bed so as to extend near the floor;
a vertically driving member for moving the vertically moving body as one of relative motions, the vertical driving member comprising a pair of left and right feed screws extending parallel to the vertical guides and disposed outside the vertical guides and inside the pair of left and right side walls, feed motors coupled to lower ends of the feed screws, for rotationally driving the feed screws, and motor brackets in direct contact with the side walls so as to extend from inner side surfaces of the side walls,
a left-right moving body mounted atop the vertically moving body so as to move in a left-right direction;
a front-rear moving body mounted atop the left-right moving body so as to move in a front-rear direction; and
a spindle head rotationally supporting the spindle and mounted to the front-rear moving body so that the vertical guides, the feed screws and the feed motors are disposed below the spindle head,
wherein the motor brackets are disposed adjacent and above the rear supporting members and inside the pair of left and right side walls for the bed, whereby downward forces acting on the motor brackets are received by the rear supporting members.

2. A machine tool according to claim 1 , wherein the vertically moving body has a pair of downwardly extending legs in the form of a bifurcated fork, and
the pair of left and right vertical guides are disposed to be overlapped by the pair of downwardly extending bifurcated legs of the vertically moving body when the vertically moving body is mounted to the rear side of the bed.

Assignees

• Suzuki Toshihiro
• Mayumi Kazuya
• Kobayashi Satoshi
• Makino Milling Machine

Inventors

• Suzuki Toshihiro
• Mayumi Kazuya
• Kobayashi Satoshi

Classifications

• B23Q1/015 Primary

  Frames, beds, pillars · CPC title

• B23Q1/017

  Arrangements of ways · CPC title

• B23Q11/0053

  using the gravity force · CPC title

• B23Q5/40

  by feed shaft, e.g. lead screw · CPC title

• B23Q1/626

  followed perpendicularly by a single sliding pair · CPC title