# US 2014/0360388 A1 · Press machine

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- Number: US 2014/0360388 A1
- Document ID: US20140360388A1
- Status: Published application
- Kind: A1
- Application number: 14/371,012
- Filed: 2013-01-08
- Published: 2014-12-11
- Earliest claimed: 2012-01-10
- Assignees: Amada Company, Limited
- Applicants: Amada Company, Limited
- Inventors: Makoto Aoki
- Web page: https://patentgrep.com/patent/US20140360388A1

## CPC

- B30B 1/181: {the screw being directly driven by an electric motor}
- B30B 1/18: by screw means {(B30B9/3064 takes precedence)}
- B30B 15/068: {Drive connections, e.g. pivotal}
- B30B: PRESSES IN GENERAL (producing ultra-high pressure or ultra-high pressure and high temperature to effect modifications of a substance, e.g. for making artificial diamonds B01J3/00 ){(compressing means for refuse receptacles B65F1/1405)}

## Abstract

In a press machine vertically moving a ram by turning a threaded member, the ram has a bearing holder that holds a bearing whose outer ring is solidly engaged with the bearing holder and whose inner ring is solidly fitted to a lower end part of the threaded member. A fine clearance is formed between a lower face of the threaded member and a bottom face of the bearing holder so that the threaded member and bearing holder are allowed to rotate relative to each other. The fine clearance is set so that, when load is applied to the ram to cause a relative slight movement in a vertical direction between the inner and outer rings of the bearing, the lower face of the threaded member and the bottom face of the bearing holder come into contact with each other.

## Claims

### Claim 1

A press machine vertically moving a ram by turning a threaded member, wherein:
the ram has a bearing holder that holds a bearing whose outer ring is solidly engaged with the bearing holder and whose inner ring is solidly fitted to a lower end part of the threaded member;
a fine clearance is formed between a lower face of the threaded member and a bottom face of the bearing holder so that the threaded member and bearing holder are allowed to rotate relative to each other; and
the fine clearance is set so that, when load is applied to the ram to cause a relative slight movement in a vertical direction between the inner and outer rings of the bearing, the lower face of the threaded member and the bottom face of the bearing holder come into contact with each other.

### Claim 2 (depends on 1)

The press machine according to claim 1, wherein
the bearing is a thrust bearing or an angular bearing and a plurality of the bearings are laid one on another.

### Claim 3 (depends on 1)

The press machine according to claim 1, wherein:
a lower part of the threaded member is provided with an upper flange to restrict a relative vertical movement of the inner ring of the bearing;
an upper side of the upper flange is solidly provided with a pulley to rotate the threaded member;
the bearing holder is solidly provided with a motor support bracket to support a motor having a drive pulley; and
a belt is stretched around the drive pulley and the pulley.