US 5,850,110 AGranted

Unbalanced mass vibration generator

AssigneeNetter GmbH

InventorDietrich Kroger

Life of this patent

Estimating the term…

Loading patent…

Abstract

An electric motor-driven unbalanced vibration generator with an electric motor which is enclosed in a motor housing and the extended motor shaft of which is provided with at least one unbalanced body which can rotate and which is provided in a region which lies radially outside of a radial segment of the unbalanced body, with an additional segment which extends over the motor housing and which can rotate around it. The axial segment of the unbalanced body represents the critical part of the unbalanced mass. As a result of the axial extension of the unbalanced body over the motor housing, and thus the shifting of the center of mass of the unbalanced mass to between the bearings of the motor, a second unbalanced mass at the other end of the motor is no longer necessary. In addition, as a result of the outside radial position of the main segment of the unbalanced body, the unbalanced mass can easily be changed by means of additional masses which can be inserted into the segment and removed from it.

Claims12

Dependent claims

A motor-driven unbalanced vibration generator comprising:

a motor housing provided with fastening means for fastening the vibration generator at its installation site,
a rotor body of the motor, which is placed inside the motor housing in such a way that it can rotate and which is provided with one shaft journal at each of its opposite ends,
at least one bearing for each of the shaft journals, in which the rotor body is supported by means of the shaft journals in such a way that said rotor body can rotate, and
at least one rotatable unbalanced body on at least one of the shaft journals, which can be joined with the shaft journal in such a way that the unbalanced body cannot turn relative to said joined shaft journal, wherein the unbalanced body on the shaft journal includes a segment which lies radially outside and which extends axially over the motor housing and can rotate around said motor housing;
wherein the center of inertia of each unbalanced body lies in an axial section plane along the axis of the shaft journals and between the bearings of the shaft journals which bearings are placed directly adjacent to the rotor body.

2 more elements

Dependencies are inferred from the claim text.