Auxiliary device for a hand-held power tool

• US 7,871,227 B2
• Filed: 10/05/2006
• Issued: 01/18/2011
• Est. Priority Date: 11/08/2005
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Mohd, Zaidi Ahmad, Stevens, James B., Adamczak, Wolfgang, Braun, Marco
• Primary Examiner(s): Cadugan; Erica E
• Application Number:
  US11/908,813
• Publication Number:
  US 20080199269A1
• Time in Patent Office: 1,566 Days
• Field of Search: 409/231, 409/134, 409/182, 409/175, 409/180, 409/232, 409/234, 409/181, 408/238, 408/239.R, 408/240, 408/197, 144/136.95, 144/154.5, 279/125, 279147-148
• US Class Current: 409/182
• CPC Class Codes: B25F 5/001 Gearings, speed selectors, clutches or the like specially adapted for rotary tools
• CPC Class Codes: B27C 5/10 Portable hand-operated wood-milling machines; Routers
• CPC Class Codes: Y10T 279/3437 Safety feature; e.g., ejector, interlock
• CPC Class Codes: Y10T 409/30392 with means to protect operative or machine [e.g., guard, safety device, etc.]
• CPC Class Codes: Y10T 409/306608 End mill [e.g., router, etc.]
• CPC Class Codes: Y10T 409/308624 with limit means to aid in positioning of cutter bit or work [e.g., gauge, stop, etc.]
• CPC Class Codes: Y10T 409/309352 Cutter spindle or spindle support

Abstract

The invention relates to an auxiliary device for a portable tool, comprising a receptacle (2) for a motor-operated portable tool (22) having an output shaft (26), and comprising a drive train (9) which has a tool receptacle (8), to be opened and closed by rotation, and which can be connected to the output shaft (26) of the motor-operated portable tool (22) via a coupling device. Provision is made for the auxiliary device (1) for the portable tool to have an anti-rotation locking means (13) acting on the drive train (9).

Claims

1. An auxiliary device for a hand-held power tool, the auxiliary device including a fitting for releasable holding a motor-operated, hand-held power tool having a drive shaft, the auxiliary device also including a drive train which includes a tool fitting, which tool fitting is rotated to be opened or closed, and which drive train includes a rotatable shaft (7) that is parallel to the drive shaft and that can be rotationally connected to the drive shaft of the motor-operated, hand-held power tool via a coupling device, the auxiliary device further comprising an anti-rotation locking device (13), which acts on the drive train (9), wherein the anti-rotation locking device (13) includes a non-rotatable locking element (35), wherein the rotatable shaft (7) includes a polygonal portion which interacts with the non-rotatable locking element (35) to rotationally lock the drive train (9) when the non-rotatable locking element (35) is moved in the direction of the rotational axis of the rotatable shaft (7).

2. The auxiliary device for a hand-held power tool as recited in claim 1, wherein the non-rotatable locking element (35) includes an opening that slides over the polygonal portion as the non-rotatable locking element (35) is moved in the direction of the rotational axis of the rotatable shaft (7).

3. The auxiliary device for a hand-held power tool as recited in claim 1, wherein the coupling device is designed as a belt drive (27).

4. The auxiliary device for a hand-held power tool as recited in claim 1, further comprising a workpiece-supporting device (17) for supporting the auxiliary device against a workpiece.

5. The auxiliary device for a hand-held power tool as recited in claim 4, wherein the workpiece-supporting device (17) is height-adjustable.

6. The auxiliary device for a hand-held power tool as recited in claim 1, wherein the drive train (9) is enclosed in a protective housing (36).

7. The auxiliary device for a hand-held power tool as recited in claim 6, wherein the protective housing (36) is designed as a handle (39).

8. The auxiliary device for a hand-held power tool as recited in claim 6, wherein the protective housing (36) is designed to insulate against heat produced during operation.

9. The auxiliary device for a hand-held power tool as recited in claim 6, wherein the protective housing (36) is located such that it is laterally offset from the fitting (2) for releasably holding the motor-operated, hand-held power tool.

10. The auxiliary device for a hand-held power tool as recited in claim 6, further comprising a manual actuating element (12), which acts on the locking element (35) and is displaceably supported in the housing (36).

11. The auxiliary device for a hand-held power tool as recited in claim 6, wherein the drive train (9) is electrically insulated by the protective housing (36).

12. The auxiliary device for a hand-held power tool as recited in claim 1, wherein the drive train (9) is located such that it extends parallel to the drive shaft of the motor-operated hand-held power tool (22) located in the fitting (2) for releasably holding the motor-operated, hand-held power tool.

13. The auxiliary device for a hand-held power tool as recited in claim 1, wherein the polygonal portion (33) interacts with the non-rotatable locking element (35) in a form-fit manner.

14. The auxiliary device for a hand-held power tool as recited in claim 1, wherein the polygonal portion (33) is located on the end of the drive train (9) opposite to the tool fitting (8).