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EP-4735204-A1 - BACKING PAD DEVICE

EP4735204A1EP 4735204 A1EP4735204 A1EP 4735204A1EP-4735204-A1

Abstract

The invention relates to a backing pad device (10), in particular for mounting on a hand-held power tool (12), in particular an angle grinder, comprising a base support (14), an interface unit (16) for connecting to an output shaft (18) of the hand-held power tool (12), in particular an angle grinder, and a connection unit (20) for fastening an abrasive disc (22) to the base support (14), which connection unit has at least one connection portion (24) located on the base support (14) and a connection plate (26) which can be releasably connected to the base support (14) and which is provided for form- and/or force-lockingly holding the abrasive disc (22) on the base support (14). According to the invention, the connection unit (20) has at least one locking element (28) mounted on the connection plate (26) and provided for releasably fastening the connection plate (26) to the connection portion (24) in the axial direction, the connection plate (26) having at least one rotary drive element (30, 30') for connection to the base support (14) for conjoint rotation.

Inventors

  • BARTH, Daniel

Assignees

  • Robert Bosch GmbH

Dates

Publication Date
20260506
Application Date
20240613

Claims (15)

  1. 1 . Support plate device (10), in particular for mounting on a hand-held power tool (12), in particular an angle grinder, with a base support (14), with an interface unit (16) for connection to an output shaft (18) of the hand-held power tool (12), in particular an angle grinder, and with a connecting unit (20) for fastening a grinding wheel (22) to the base support (14), which has at least one connecting section (24) arranged on the base support (14) and a connecting plate (26) which can be detachably connected to the base support (14), which is intended to hold the grinding wheel (22) in a form-fitting and/or force-fitting manner on the base support (14), characterized in that the connecting unit (20) has at least one locking element (28) mounted on the connecting plate (26), which is intended to detachably fix the connecting plate (26) in the axial direction on the connecting section (24), wherein the Connecting plate (26) has at least one rotary drive element (30, 30’) for a rotationally fixed connection to the base support (14).
  2. 2. Support plate device according to claim 1, characterized in that the locking element (28) and the connecting plate (26) form a closure part (32), wherein the locking element (28) is captively connected to the connecting plate (26).
  3. 3. Support plate device according to claim 1 or 2, characterized in that the locking element (28) has at least one closing extension (34, 34') which, in a locking position of the locking element (28), is provided to at least partially engage behind the connecting section (24) of the connecting unit (20) arranged on the base support (14).
  4. 4. Support plate device according to claim 3, characterized in that the at least one closing extension (34, 34') of the locking element (28) is arranged overlapping the rotary drive element (30, 30') in an open position of the locking element (28).
  5. 5. Support plate device according to one of the preceding claims, characterized in that the connecting plate (26) has at least one stop (36, 36') which is provided to limit a rotational movement of the locking element (28) in at least one direction, in particular an opening direction (38).
  6. 6. Support plate device at least according to claim 3 and 5, characterized in that the stop (36, 36') is formed by an extension on the rotary drive element (30, 30') and is intended to cooperate directly with the at least one closing extension (34, 34') to limit the rotary movement of the locking element (28).
  7. 7. Support plate device according to one of the preceding claims, characterized in that the connecting unit (20) has an operating lever (40) arranged on the locking element (28) for rotating the locking element (28).
  8. 8. Support plate device according to claim 7, characterized in that the operating lever (40) is pivotally mounted on the locking element (28), wherein the operating lever (40) has an operating position and a stowage position in which the operating lever (40) is folded onto the locking element (28).
  9. 9. Support plate device according to one of the preceding claims, characterized in that the connecting plate (26) has a conical fixing surface (42) for fixing the grinding wheel (22).
  10. 10. Support plate device according to claim 9, characterized in that the connecting plate (26) has form-fitting extensions (44) on the fixing surface (42), which are intended to engage in recesses (46) of the grinding wheel (22).
  11. 11. Support plate device according to one of the preceding claims, characterized in that the connecting section (24) has at least one axial recess (48, 48') for receiving the rotary drive element (30, 30') and at least one radial fixing collar (50, 50') adjacent to the recess (48, 48'), which is intended to be engaged behind by a closing extension (34, 34') of the locking element (28) in a locking position.
  12. 12. Support plate device according to claim 11, characterized in that the fixing collar (50, 50') has at least one stop (52, 52') which is provided to limit a rotational movement of the locking element (28) in at least one direction, in particular a closing direction (54).
  13. 13. Support plate device according to one of the preceding claims, characterized in that the connecting section (24) is connected integrally, in particular in one piece, to the base support (14).
  14. 14. Hand-held power tool system with a hand-held power tool (12), in particular an angle grinder, and with a support plate device (10) according to one of the preceding claims.
  15. 15. Closure part of a support plate device (10) according to claim 2.

Description

Description support plate device State of the art A support plate device has already been proposed, in particular for mounting on a hand-held power tool, in particular an angle grinder, with a base support, with an interface unit for connection to an output shaft of the hand-held power tool, in particular an angle grinder, and with a connecting unit for fastening a grinding wheel to the base support, which has at least one connecting section arranged on the base support and a connecting plate which can be detachably connected to the base support and which is intended to hold the grinding wheel positively and/or non-positively on the base support. Furthermore, EP 0 904 896 A2 already discloses a support plate device, in particular for mounting on a hand-held power tool, in particular an angle grinder, with a base support, with an interface unit for connection to an output shaft of the hand-held power tool, in particular an angle grinder. disclosure of the invention The invention is based on a support plate device, in particular for mounting on a hand-held power tool, in particular an angle grinder, with a base support, with an interface unit for connection to an output shaft of the hand-held power tool, in particular an angle grinder, and with a connection unit for fastening a grinding wheel to the base support, which has at least one connecting portion and a connecting plate which can be detachably connected to the base support and which is intended to hold the grinding wheel in a form-fitting and/or force-fitting manner to the base support. It is proposed that the connection unit has at least one locking element mounted on the connection plate, which is intended to releasably fix the connection plate in the axial direction to the connection section, wherein the connection plate has at least one rotary drive element for a rotationally fixed connection to the base support. Preferably, the locking element is intended to fix the connection plate to the base support, wherein the connection plate in turn is intended to fix a grinding wheel, in particular sandpaper and/or a fiber disc, to the base support. Preferably, the connection plate is intended to provide a fixation in the circumferential direction, while the is intended to provide a fixation in the axial direction. Preferably, the locking element and the connection plate are designed to be completely separable from the base support. Preferably, the locking element and the connection plate are intended to be removed from the base support in order to change a grinding wheel. Particularly preferred is a fixation of the grinding wheel to the base support independently of a fixation of the support plate device to the hand-held power tool. The connection unit is in particular designed separately from the interface unit and independently of it. Preferably, the connection unit can be opened and released, regardless of whether the interface unit is connected to a hand-held power tool. A “support plate device” is preferably understood to mean at least a part of a support plate, in particular for a grinding wheel, preferably for fiber discs and/or sandpaper, which is intended for direct arrangement on a hand-held power tool, in particular an angle grinder. In particular, the support plate device can also comprise the entire support plate. The support plate device is in particular intended for direct arrangement and fastening on a tool interface of the hand-held power tool. The fact that an object is intended for a specific function is preferably understood to mean that the object has this fulfills and/or carries out a specific function in at least one application and/or operating state. An "operating state" should preferably be understood as a state in which the support plate device is ready for a turning process and/or is at least coupled to the motor and/or the hand-held power tool and/or is in a turning operation. A "hand-held power tool" should be understood in particular as a machine for machining workpieces, but advantageously as a drill, a hammer drill and/or impact hammer, a saw, a plane, a screwdriver, a milling machine, a grinder, an angle grinder, a garden tool and/or a multi-function tool. The base support in particular forms a base body of the support plate device. The base support preferably forms a plate which serves to support a grinding wheel. The base support in particular has a plate shape. In this context, an “interface unit” is to be understood as a unit which is used to connect to an output shaft of the hand-held power tool. The interface unit is used in particular for a direct, detachable connection to a tool holder, in particular a tool chuck, of the hand-held power tool. The interface unit is arranged in particular on a side of the support plate device facing away from a workpiece. The interface unit is particularly intended to fasten the support plate device directly to a tool holder of a hand-held power tool in a way that is detachable by