Grinding means device, in particular grinding-disc device or backup-pad device

Patent metadata

Field	Value
Publication number	US-11865667-B2
Application number	US-201816488362-A
Country	US
Kind code	B2
Filing date	Mar 13, 2018
Priority date	Apr 12, 2017
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

A grinding-means device, in particular a grinding-disc device or backup-pad device, for arranging at least one grinding means, in particular at least one grinding wheel, on a portable power tool, in particular a grinding machine, includes at least one receiving unit, in particular a grinding disc or backup pad, which is fixable in a thread-free manner on an output unit of the tool and on which at least one grinding means is arranged. The grinding-means device includes at least one securing unit formed separately from the receiving unit and configured to axially fix the receiving unit and/or the grinding means to the output unit of the tool in a tool-free manner, and/or at least to axially fix the grinding means to the receiving unit in a tool-free manner.

First claim

The invention claimed is:

1. A grinding device for arranging at least one grinding apparatus on a portable machine tool, the grinding device comprising:
at least one receiving unit configured to be fixed on an output unit of the portable machine tool and configured for the at least one grinding apparatus to be arranged on the at least one receiving unit; and
at least one securing unit configured for axially fixing the at least one receiving unit and/or the at least one grinding apparatus on the output unit of the portable machine tool, wherein the at least one securing unit is configured to (i) axially fix the at least one receiving unit and/or the grinding apparatus on the output unit of the portable machine tool in a tool-free manner with the at least one receiving unit and/or the grinding apparatus clamped between the at least one securing unit and the output unit, and/or (ii) axially fix the grinding apparatus on the at least one receiving unit in a tool-free manner with the grinding apparatus clamped between the at least one securing unit and the at least one receiving unit,
wherein the at least one securing unit is configured to couple to and de-couple from the at least one receiving unit in a tool-free manner, and
wherein the at least one securing unit comprises at least one axial securing element, which is mounted movably on a main body of the at least one securing unit.

2. The grinding device as claimed in claim 1 , wherein the at least one axial securing element engages at least partially in a receiving recess of the at least one receiving unit to axially fix the at least one receiving unit and/or the grinding apparatus in the tool-free manner.

3. The grinding device as claimed in claim 1 , wherein the at least one axial securing element is configured to be deflected in a spring-elastic manner.

4. The grinding device as claimed in claim 1 , wherein the main body of the at least one securing unit has at least one movement-guiding element, which includes a guide groove configured to guide the at least one axial securing element during a movement relative to the main body of the at least one securing unit.

5. The grinding device as claimed in claim 1 , wherein the main body of the at least one securing unit has at least one movement-limiting element that limits a maximum movement distance of the at least one axial securing element relative to the main body of the at least one securing unit.

6. The grinding device as claimed in claim 1 , wherein the at least one receiving unit includes at least one torque-transmitting element adjacent to a receiving recess in which the at least one securing unit at least partially engages, said torque-transmitting element being configured to interact with a torque-transmitting projection of the portable machine tool when the at least one receiving unit is arranged on the output unit of the portable machine tool.

7. The grinding device as claimed in claim 1 , wherein the at least one receiving unit includes at least one torque-transmitting element, which has at least one bearing face at least substantially parallel to a radial direction of the at least one receiving unit.

8. The grinding device as claimed in claim 1 , wherein:
the at least one receiving unit defines at least one receiving recess in which the at least one securing unit at least partially engages, and
the at least one receiving unit includes at least one edge region at least partially delimiting the receiving recess, the at least one edge region including at least one contact face configured to transmit at least one of a drive force and a drive torque to the at least one securing unit.

9. The grinding device as claimed in claim 1 , wherein:
the at least one receiving unit defines at least one positioning recess configured for positioning the at least one securing unit, and
the at least one positioning recess is arranged adjacent to a receiving recess defined in the at least one receiving unit, the receiving recess at least partially delimited by at least one edge region of the at least one receiving unit, said at least one edge region being configured to transmit at least one of a drive force and a drive torque to the at least one securing unit.

10. The grinding device as claimed in claim 1 , wherein the at least one securing unit includes at least one form-fitting element configured to transmit at least one of a drive force and a drive torque to the at least one grinding apparatus.

11. The grinding device as claimed in claim 10 , wherein the at least one form-fitting element is arranged on a clamping face of the at least one securing unit which is configured to be placed against the at least one grinding apparatus to axially fix the at least one grinding apparatus on the at least one receiving unit and/or on the output unit.

12. A grinding device as claimed in claim 1 , wherein:
the portable machine tool is a grinding machine,
the grinding device is a grinding-disk device or a backup-pad device,
the at least one grinding apparatus includes at least one grinding wheel, and
the at least one receiving unit is a grinding disk or backup pad.

13. The grinding device as claimed in claim 1 , wherein the at least one receiving unit is configured to be fixed in a thread free manner on the output unit.

14. The grinding device as claimed in claim 1 , wherein
an axis of movement of the at least one axial securing element runs parallel to an axis of rotation of the at least one securing unit.

15. A grinding apparatus comprising:
a grinding wheel configured to be fixed on a grinding machine by a grinding device that comprises:
a receiving unit configured to be fixed on an output unit of the grinding machine and by which the grinding apparatus is arranged on the receiving unit; and
a securing unit configured for axially fixing the receiving unit and/or the grinding apparatus on the output unit of the grinding machine,

wherein the securing unit is configured to axially fix the grinding wheel on the output unit of the portable machine tool in a tool-free manner with the grinding wheel clamped between the securing unit and the output unit, and/or to axially fix the grinding wheel on the receiving unit in a tool-free manner with the grinding wheel clamped between the securing unit and the receiving unit,
wherein the securing unit is configured to couple to and de-couple from the receiving unit in a tool-free manner, and
wherein the securing unit comprises an axial securing element, which is mounted movably on a main body of the securing unit.

16. The grinding apparatus as claimed in claim 15 , further comprising:
at least one coupling unit configured to connect to the securing unit of the grinding device,
wherein the coupling unit has at least two differently designed connecting elements configured as connecting recesses to connect with the securing unit.

17. The grinding apparatus as claimed in claim 16 , wherein
the at least two differently designed connecting elements have different maximum width extensions,
the securing unit includes at least one axial securing element, and
an axis of movement of the at least one axial securing element runs parallel to an axis of rotation of the securing unit.

18. An insert tool comprising:
a grinding apparatus; and
a grinding device comprising:
a receiving unit configured to be fixed on an output unit of a portable machine tool and by which the grinding apparatus is arranged on the receiving unit; and
a securing unit configured for axially fixing the receiving unit and/or the grinding apparatus on the

Assignees

• Bosch Gmbh Robert

Inventors

• Sinzig Bruno
• Christen Stefan
• Laett Michael
• Quebatte Laurent
• Winistoerfer David

Classifications

• B24B45/006 Primary

  Quick mount and release means for disc-like wheels, e.g. on power tools · CPC title

• B23B45/02 Primary

  driven by electric power · CPC title

• B23D45/16

  Hand-held sawing devices with circular saw blades · CPC title

• B27B5/32

  Devices for securing circular saw blades to the saw spindle · CPC title

• B24B45/00

  Means for securing grinding wheels on rotary arbors (suppression of vibrations in systems F16F15/00; testing static or dynamic balancing of machines G01M1/00) · CPC title