Retaining body for flexible grinding means, grinding system and grinding tool

Patent metadata

Field	Value
Publication number	US-10029349-B2
Application number	US-201214345444-A
Country	US
Kind code	B2
Filing date	Jul 30, 2012
Priority date	Sep 20, 2011
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A retaining body for a grinding structure, in particular a grinding wheel, includes a fixing layer with a fixing surface. The fixing surface has a fixing structure configured to fix a flexible grinding structure, and includes a support body with a support surface. The support surface supports a fixing layer retaining surface that lies opposite the fixing surface, and is connected to the retaining surface. The support body is air- and dust-permeable, and includes an air- and dust-permeable material. The fixing layer is configured such that the fixing surface is substantially air- and dust-permeable in a direction that runs substantially perpendicular to the fixing surface, and such that an air flow can pass from the fixing surface through the fixing layer in a substantially perpendicular manner relative to the fixing surface.

First claim

The invention claimed is:

1. A retaining body for a grinding structure, comprising:
a fastening layer with a fastening surface, having a fastening structure configured to fasten a flexible grinding structure; and
a support body with a support surface configured to support a retaining surface, wherein:
the support body is air and dust permeable;
the fastening layer is configured such that the fastening surface, in a direction running substantially perpendicular to the fastening surface, is substantially air and dust permeable, so that an air flow can pass from the fastening surface, substantially perpendicular to the fastening surface, through the fastening layer;
the support body has a recessed surface that is recessed from the support surface, the recessed surface defining a dust chamber;

the support body further includes a knobbed structurization that includes a plurality of supporting projections protruding from the recessed surface and which are separated from one another by at least one of ducts, channels and grooves configured to guide an air flow, the plurality of supporting projections including an outer surface that form at least a portion of the support surface.

2. The retaining body as claimed in claim 1 , wherein:
the air flow running substantially perpendicular to the fastening surface, after having passed through the fastening layer, undergoes at least a partial diversion into a crossflow through the support body; and
the crossflow runs, from a perspective of the grinding structure, substantially behind the fastening layer.

3. The retaining body as claimed in claim 2 , wherein the at least partial diversion of the air flow takes place substantially in the dust chamber.

4. The retaining body as claimed in claim 1 , wherein:
the fastening structure is configured as a mechanical fastening structure for fastening of a flexible grinding structure; and
at least one of loops and hooks protrude from the fastening surface.

5. The retaining body as claimed in claim 1 , wherein the fastening layer includes an open-pore material.

6. The retaining body as claimed in claim 1 , wherein the fastening layer includes a textile material having at least one of loops, hooks, and mushroom heads.

7. The retaining body as claimed in claim 1 , wherein the fastening layer substantially covers the fastening surface.

8. The retaining body as claimed in claim 1 , wherein the support body has at least one suction air bore, which, in an air and dust permeable manner, connects the dust chamber to a surface lying opposite the support surface, and through which air can be extracted from the dust chamber.

9. The retaining body as claimed in claim 1 , wherein the support body has at least one fresh air line, via which an air stream can be conducted into a region in front of the fastening layer of the retaining body.

10. The retaining body as claimed in claim 1 , wherein:
the support body has a connection surface lying substantially opposite the support surface;
the connection surface has a smaller surface area than a surface area of the support surface; and
at least one extraction opening is located in the connection surface.

11. The retaining body as claimed in claim 10 , wherein:
the support body has at least a supporting element and a cover plate
the supporting element extends between the support surface and the cover plate and is air and dust permeable; and
the cover plate substantially covers the connection surface or forms the connection surface.

12. The retaining body as claimed in claim 10 , wherein:
the support body has a protective element; and
a radial outer contour, facing toward the support surface, of the protective element substantially resembles an outer contour of the support surface.

13. The retaining body as claimed in claim 12 , wherein:
the protective element has a contact surface, which lies in a plane of the support surface; and
the fastening layer is connected, at least at the contact surface, to the protective element.

14. A grinding system comprising:
at least one retaining body for a flexible grinding structure that includes:
a fastening layer with a fastening surface having a fastening structure configured to fasten a flexible grinding structure; and
a support body with a support surface configured to support a retaining surface, wherein:
the support body is air and dust permeable;
the fastening layer is configured such that the fastening surface, in a direction running substantially perpendicular to the fastening surface, is substantially air and dust permeable; and
the support body has a recessed surface that is recessed from the support surface, the recessed surface defining a dust chamber;
the support body further includes a knobbed structurization that includes a plurality of supporting projections protruding from the recessed surface and which are separated from one another by at least one of ducts, channels and grooves configured to guide an air flow, the plurality of supporting projections including an outer surface that form at least a portion of the support surface; and

at least one at least partially air and dust permeable grinding structure configured to be fastened to the fastening surface of the retaining body.

15. The grinding system as claimed in claim 14 , further comprising a drive unit configured to drive the at least one retaining body.

16. A retaining body for a grinding structure, comprising:
a fastening layer with a fastening surface, having a fastening structure configured to fasten a flexible grinding structure; and
a support body with a support surface configured to support a retaining surface, wherein:
the support body is air and dust permeable;
the fastening layer is configured such that the fastening surface, in a direction running substantially perpendicular to the fastening surface, is substantially air and dust permeable, so that an air flow can pass from the fastening surface, substantially perpendicular to the fastening surface, through the fastening layer,
the support body has a dust chamber, that, from a perspective of the support surface, has a knobbed structurization, and is permeated by at least one of ducts, channels and grooves configured to guide an air flow, and
the support body has at least one fresh air line, via which an air stream can be conducted into a region in front of the fastening layer of the retaining body.

Assignees

• Christen Stefan
• Schnyder Juerg
• Mathys Thomas
• Bosch Gmbh Robert

Inventors

• Christen Stefan
• Schnyder Juerg
• Mathys Thomas

Classifications

• B24D9/085

  Devices for mounting sheets on a backing plate · CPC title

• B24B55/10

  specially designed for portable grinding machines, e.g. hand-guided · CPC title

• B24D9/08 Primary

  Circular back-plates for carrying flexible material · CPC title

• B24D9/10

  with suction means for securing the material · CPC title