Oscillatory linear actuator and cutting device

Patent metadata

Field	Value
Publication number	US-10538003-B2
Application number	US-201815947895-A
Country	US
Kind code	B2
Filing date	Apr 9, 2018
Priority date	Apr 19, 2017
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

An oscillatory linear actuator includes: an output movable element which is reciprocated by a periodically varying magnetic field and performs work on an object; and a vibration absorbing movable element which is reciprocated at a phase opposite to a phase of the output movable element and reduces vibration of the oscillatory linear actuator. The output movable element includes: a first driver which generates a thrust force which is reciprocated by a magnetic field; a work part which performs work on the object at a predetermined distance away from the first driver; a shaft which connects the work part and the first driver; a first weight opposite to the work part relative to the first driver; and a weight support which connects the work part and the first weight.

First claim

What is claimed is:

1. An oscillatory linear actuator comprising:
an output movable element which is reciprocated by a periodically varying magnetic field and performs work on an object; and
a vibration absorbing movable element which is reciprocated at a phase opposite to a phase of the output movable element and reduces vibration of the oscillatory linear actuator,
wherein the output movable element includes:
a first driver which generates a thrust force which is reciprocated by a magnetic field;
a work part which performs work on the object at a predetermined distance away from the first driver;
a shaft which is coupled to the work part and the first driver;
a first weight opposite to the work part relative to the first driver; and
a weight support which is coupled to the first driver and the first weight,

wherein the vibration absorbing movable element includes:
a second driver disposed parallel to the first driver, and disposed on a line extending from and parallel with the shaft;
a second weight disposed on a work part side of the first driver; and
a connector which connects the second driver and the second weight, and

wherein the first weight is disposed at a position farther from the second driver than the second weight is.

2. The oscillatory linear actuator according to claim 1 ,
wherein, in a direction in which the first driver and the second driver are arranged, a center of mass of the output movable element is disposed at a position which satisfies at least one of (a) a condition that the center of mass of the output movable element is identical to a center of mass of the vibration absorbing movable element and (b) a condition that the center of mass of the output movable element is on a first driver side relative to an intermediate position between the first driver and the second driver.

3. The oscillatory linear actuator according to claim 1 , further comprising:
an attachment part to which the first driver is attached,
wherein the attachment part, the shaft, and the weight support are integrally formed.

4. A cutting device comprising:
the oscillatory linear actuator according to claim 1 ;
a movable blade which serves as the work part; and
a stationary blade which rubs against the movable blade.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Murakami Tomoaki
• Kobayashi Noboru
• Inoue Hiroki
• Moriguchi Masashi

Classifications

• H02K7/00

  Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines · CPC title

• B26B19/06

  involving co-operating cutting elements both of which have shearing teeth · CPC title

• H02K16/02

  Machines with one stator and two {or more} rotors · CPC title

• H02K7/104

  with eddy-current brakes · CPC title

• B26B19/282 Primary

  Motors without a rotating central drive shaft, e.g. linear motors · CPC title