Vibration exciter

Patent metadata

Field	Value
Publication number	US-10488300-B2
Application number	US-201715654175-A
Country	US
Kind code	B2
Filing date	Jul 19, 2017
Priority date	Jul 27, 2016
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A vibration-sensor-integrated vibration exciter 4 has a chassis 21 , an excitation unit 22 , a magnet 23 , a yoke 24 , a vibration sensor 25 , a fixed plate 26 , a moving plate 27 , coil springs 28 a to 28 d , a retaining plate 29 , and a crisscross plate 30 . Shafts 31 a to 31 d are fixed to the fixed plate 26 . The excitation unit 22 is fixed to the crisscross plate 30 . Four vibration-proof rubber members 32 a to 32 d are installed to the crisscross plate 30 at 90-degree pitches with same radius centering on the excitation axis of the fixed excitation unit 22 . The crisscross plate 30 is installed to the retaining plate 29 through the vibration-proof rubber members 32 a to 32 d . A vibration applied to the chassis 21 is absorbed by the vibration-proof rubber members 32 a to 32 d , to prevent the yoke 24 from being dislocated in lateral direction due to the vibration.

First claim

What is claimed is:

1. A vibration exciter comprising:
a chassis;
a magnet fixed to an interior of the chassis;
an excitation unit which comes in contact with a work to vibrate the work;
a vibration generating unit which is integral with the excitation unit, around which a coil is wound, and which generates a vibration cooperatively with the coil and the magnet;
a vibration sensor which is installed on an excitation axis of the excitation unit and which detects a resonance vibration of the work that is being vibrated;
a support member which supports the excitation unit;
a retaining plate which has a size larger than a size of the chassis such that an outer portion of the retaining plate extends beyond the chassis; and
vibration-proof members which retain the support member at three or more locations equidistant in a radial direction from the excitation axis of the excitation unit and spaced at regular intervals in a circumferential direction, and which are mechanically fixed to the chassis, via the retaining plate by contacting a lower surface of the retaining plate at an outer side than the chassis, in such a state as to retain the support member.

2. The vibration exciter according to claim 1 ,
wherein a distal end surface of the excitation unit that comes in contact with the work is formed to have a spherical surface that provides a constant distance from the distal end surface to the vibration sensor.

3. The vibration exciter according to claim 1 , further comprising:
a pressing unit which presses the excitation unit against the work to prevent the excitation unit from being separated from the work in the case where a vibration is imparted by the excitation unit.

4. A vibration exciter comprising:
a chassis;
a magnet fixed to an interior portion of the chassis;
an excitation unit which comes in contact with a work to vibrate the work;
a vibration generating unit which is integral with the excitation unit, around which a coil is wound, and which generates a vibration cooperatively with the coil and the magnet;
a vibration sensor which is installed on an excitation axis of the excitation unit and which detects a resonance vibration of the work that is being vibrated;
a fixed plate which has an outer diameter larger than an outer diameter of the chassis;
a plurality of shafts having one end side attached to the fixed plate;
a moving plate which has an outer diameter larger than an outer diameter of the chassis, and which is provided with a through-hole in which the shafts are inserted;
a support member which supports the excitation unit;
a retaining plate which has a size larger than a size of the chassis such that an outer portion of the retaining plate extends beyond the chassis, and to which other end side of the plurality of shafts is fixed;
a plurality of spring members each of which is inserted into the plurality of shafts, and one end contacts the moving plate and other end contacts the retaining plate, and
vibration-proof members which retain the support member at three or more locations equidistant in a radial direction from the excitation axis of the excitation unit and spaced at regular intervals in a circumferential direction, and which are mechanically fixed to the chassis via the retaining plate by contacting a lower surface of the retaining plate at an outer side than the chassis, in such a state as to retain the support member.

Assignees

• Honda Motor Co Ltd

Inventors

• Kobayashi Kota
• Kono Ichiro
• Kondo Takeshi
• Yamada Taishi

Classifications

• G01M7/02

  Vibration-testing {by means of a shake table} · CPC title

• B06B1/045

  using vibrating magnet, armature or coil system · CPC title

• G01H1/00 Primary

  Measuring {characteristics of} vibrations in solids by using direct conduction to the detector (G01H9/00, G01H11/00 take precedence) · CPC title

• G01H11/04

  using magnetostrictive devices · CPC title

• G01M13/028 Primary

  Acoustic or vibration analysis · CPC title