DE10348976A1 - Vibration damped handgrip especially for a power hand tool has a cylindrical grip positioned with an internal damping mass on elastomer mountings - Google Patents

Abstract

A vibration damped handgrip, e.g. for a power hand tool, has a cylindrical grip (2) with an inner space (4) and incorporating a damping mass (5) held by elastomer dampers (6). The size of the mass is selected to best match the machine and its application. The grip is connected to the machine via an elastomer block (7) and incorporating a second damping mass (8). The elastomer material and the damping masses are selected to dampen a wide range of frequencies with reduced risk of resonance.

Description

The The present invention relates to a vibration-damped handle, in particular for carrying and / or guiding a driven by a drive unit The implement, like drill, motor chainsaw or similar.

State of technology

at hand-held, in particular driven by a drive unit, machines it comes through various excitation mechanisms (imbalance, nonlinearities in the drive, Polygon effects) and / or simultaneously stimulating different eigenmodes the machine in resonance to vibrations on the handles. Such Vibrations are undesirable, since they are too early Fatigue when working with the machine.

presentation the invention

task The invention is a handle, in particular for carrying and / or To lead a power unit driven by a drive unit to provide in which the transmitted from the drive unit to the handle Vibrations are significantly reduced.

These Task is with a handle with all features of the claim 1 solved. Advantageous embodiments of the invention are described in the subclaims.

According to the invention is in a handle, in particular for carrying and / or guiding a driven by a drive unit working device, such as Drill, motor chainsaw or the like, which is a substantially cylindrical grip element and a device side arranged mounting portion includes, provided that the Handle element as a sleeve is formed, in the inner cavity of a damper mass mounted vibratory is. The inventive arrangement The absorber mass has the effect of having special narrowband frequency ranges can be significantly reduced, without the leadership stability of the handle to worsen.

The Connection of the absorber mass in the cavity can be used for the different spatial and rotational directions are performed with different stiffnesses. This would be nice can be realized in a simple manner that the elastomeric Connections of absorber mass in the different spatial directions have different shape.

to Connection of the absorber mass in the cavity are preferably holding means made of elastomeric material because the properties stiffness and damping can be varied in a wide range. But also other materials, like For example, sheets of spring steel are conceivable.

The Tilgermasse is preferably made of steel. Preferably the absorber mass as a rod-shaped Element formed, since thus the absorber mass optimally in the Handle can integrate.

In a further preferred embodiment invention, the attachment portion comprises an intermediate piece made of rubber-elastic, preferably elastomeric material for vibration decoupling of Handle on.

The connecting piece made of rubber-elastic material can here in two sections be divided, wherein between the two sections as a Vibration damper designed intermediate ring can be provided. By this measure is the connection to the device housing compared to a pure Elastomer connection stabilized.

Of the Inventive vibration-damped handle can be everywhere to use where man with his hands directly to the vibrations of a Machine is exposed, especially in hand-held work machines, such as drills, angle grinders, demolition hammers, concrete vibrators, chainsaws, woodworking tools, Brushcutters, lawnmowers, Snow blowers, Sweepers, chop saws, Orbital sanders, vibration saws, Raw grinder, milling cutter, electric sheet metal working tools and the like, but also in hand-held Food processors, like mixers, juicers and the same. Further fields of application are handles of means of transportation, such as bicycles, Motorcycles, Motor vehicles of all kinds, tree rails, agricultural machinery, aircraft and the same.

following The invention will be explained in more detail with reference to FIG.

It shows:

1 in a schematic side sectional view of a preferred embodiment of a handle according to the invention.

One recognizes in 1 a handle according to the invention 1 in particular for carrying and / or guiding a drive unit driven by a drive unit, such as a power cutter, motor chain saw or the like, which has a substantially sleeve-shaped outer handle element 2 and a Befestigunssabschnitt 3 for mounting the handle 1 Having on a device housing, not shown here or the like. According to the Er is the handle element 2 is formed as a sleeve, in its inner cavity 4 a damper mass 5 is mounted vibratory. The connection of the absorber mass 5 in the cavity 4 can be designed for the different spatial and rotational directions with different stiffness. To connect the absorber mass in the cavity are in the in 1 illustrated embodiment without restrictions on the general holding means 6 made of elastomeric material. According to a preferred embodiment of the invention, the attachment portion 3 in the illustrated embodiment, an intermediate piece 7 made of rubber-elastic, preferably elastomeric, material for vibration decoupling of the handle. The intermediate piece 7 is divided in the illustrated embodiment into two sections, wherein between the two sections designed as a vibration absorber intermediate ring 8th is arranged. By this measure, the connection to the device housing is stabilized against a pure elastomer connection.

Claims (5)

Vibration-damped handle ( 1 ), in particular for carrying and / or guiding a drive unit driven by a drive unit, such as a drill, motor chain saw or the like, comprising a substantially cylindrical grip element ( 2 ) and a device-side mounting portion ( 3 ), whereby the handle element ( 2 ) is formed as a sleeve, in the inner cavity ( 4 ) an absorber mass ( 5 ) is mounted oscillatory. Vibration-damped handle according to claim 1, characterized in that the connection of the absorber mass ( 5 ) in the cavity ( 4 ) is designed for the different space and rotation directions with different stiffness. Vibration-damped handle according to claim 1 or 2, characterized in that for the connection of the absorber mass ( 5 ) in the cavity ( 4 ) Holding means ( 6 ) are provided of elastomeric material. Vibration-damped handle according to one of claims 1 to 3, characterized in that the fixing portion ( 3 ) an intermediate piece ( 7 ) made of rubber-elastic, preferably elastomeric, material for vibration isolation of the handle ( 1 ) having. Vibration-damped handle according to claim 4, characterized in that the intermediate piece ( 7 ) is divided into two sections from rubber-elastic material and that between the two sections designed as a vibration absorber intermediate ring ( 8th ) is provided.