Attachment for a hand-held power tool

Patent metadata

Field	Value
Publication number	US-12220803-B2
Application number	US-202017606910-A
Country	US
Kind code	B2
Filing date	Apr 28, 2020
Priority date	May 2, 2019
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

An attachment for a hand-held power tool, wherein the attachment has an attachment housing and a drive element on a drive side, which drive element can be coupled to a machine output element of the hand-held power tool in order to drive the attachment and is firmly connected to an output element of the attachment or is motion-coupled via a gear to drive a working tool, wherein the attachment has a fastening device on the drive side for detachable fastening to the hand-held power tool, wherein the fastening device has at least one support surface that is stationary with respect to the attachment housing for providing support on the hand-held power tool in the direction of a support axis and at least one locking body adjustable between a locking position and an unlocking position and loaded into the locking position by a spring assembly.

First claim

The invention claimed is:

1. An attachment for a hand-held power tool, wherein the attachment comprises:
an attachment housing;
a drive element on a drive side, wherein the drive element can be coupled to a machine output element of the hand-held power tool in order to drive the attachment and firmly connected to an output element of the attachment or motion-coupled via a gear in order to drive a working tool; and
a fastening device on the drive side for detachable fastening to the hand-held power tool, wherein the fastening device comprises:
at least one support surface that is stationary with respect to the attachment housing for support on the hand-held power tool in a direction of a support axis; and
at least one locking body adjustable between a locking position and an unlocking position and loaded into the locking position by a spring assembly,

wherein the at least one locking body has at least one locking contour which, in the locking position, is in engagement with a counter-locking contour of the hand-held power tool when the at least one support surface is supported on the hand-held power tool, and, in the unlocking position, is out of engagement with the counter-locking contour in order to remove the attachment from the hand-held power tool, and wherein the at least one locking body is rotatably mounted about the support axis an the adjustment between the locking position and the unlocking position, and
wherein the attachment further comprises an actuating device for triggering a movement of the at least one locking body from the unlocking position into the locking position, wherein the actuating device has a blocking body which holds the at least one locking body in a blocking position against the force of the spring assembly in the unlocking position and which can be brought into a release position, by an operator action, in which the blocking body releases the at least one locking body for movement out of the unlocking position in a direction of the locking position.

2. The attachment according to claim 1 , wherein a tool mount for the working tool is arranged on the output element, so that the drive motor of the hand-held power tool can drive the working tool via the attachment.

3. The attachment according to claim 1 , wherein the locking contour is provided and/or designed for engagement with a counter-locking contour of the hand-held power tool, which is stationary with respect to a machine housing of the hand-held power tool.

4. The attachment according to claim 1 , wherein the at least one locking body and the drive element are rotatably mounted independently of one another and/or rotationally decoupled from each other with respect to the attachment housing or on the attachment housing.

5. The attachment according to claim 1 , wherein at least one locking contour is/or comprises a bayonet contour and/or has an arc shape and/or extends annularly around the support axis and/or comprises a locking cam.

6. The attachment according to claim 1 , wherein the at least one locking contour has at least one clamping contour, for clamping the attachment to the hand-held power tool.

7. The attachment according to claim 1 , wherein the at least one locking body is designed as an annular body extending around the support axis in a partially ring-shaped or ring-shaped manner.

8. The attachment according to claim 1 , wherein the at least one locking contour comprises at least two locking contours arranged at an angular distance on the at least one locking body.

9. The attachment according to claim 1 , wherein the at least one locking body cannot be actuated from the locking position in a direction of the unlocking position when the attachment is arranged on the hand-held power tool and/or wherein, on a side of the locking body facing the hand-held power tool, there is no actuating surface or actuating bevel arranged with the aid of which a contour of the hand-held power tool can actuate the at least one locking body from the locking position in the direction of the unlocking position.

10. The attachment according to claim 1 , wherein the at least one locking body has at least one gripping contour which can be grasped by an operator.

11. The attachment according to claim 1 , wherein the spring assembly comprises a torsion spring through which the support axis passes and which is supported, on the one hand, on the attachment housing and, on the other hand, on the at least one locking body.

12. The attachment according to claim 1 , wherein the drive element is arranged in an interior space of the spring assembly and/or of the at least one locking body.

13. The attachment according to claim 1 , wherein the blocking body is longitudinally displaceable, and/or is rotatably mounted on the attachment housing or with respect to the attachment housing.

14. The attachment according to claim 1 , wherein the blocking body is loaded in a direction of the blocking position by the spring assembly.

15. The attachment according to claim 1 , the blocking body has an actuating contour which can be actuated by the hand-held power tool to actuate the blocking body from the blocking position into the release position.

16. The attachment according to claim 1 , wherein the at least one anti-rotation contour is arranged on the blocking body and/or is designed to actuate the blocking body from the blocking position into the release position.

17. The attachment according to claim 1 , wherein an actuating gear is arranged between the at least one locking body and the blocking body, by means of which actuating gear the at least one locking body releases or actuates the blocking body for an adjustment from the release position of the blocking body into the blocking position of the blocking body when the at least one locking body moved from the locking position of the at least one locking body to the unlocking position of the at least one locking body.

18. The attachment according to claim 17 , wherein the actuating gear is a bevel gear and/or deflects or releases a rotary movement of the at least one locking body about the support axis into a linear movement of the blocking body parallel to the support axis and/or has inclined surfaces for engagement with one another.

19. The attachment according to claim 1 , wherein no torque-converting or speed-changing component is arranged between the drive element and the output element or wherein the gear is a speed-changing gear, and/or an angular gear is arranged and/or wherein the axes of rotation of the drive element and of the output element are angled to one another or have parallel spacing apart from one another.

20. The attachment according to claim 1 , wherein on an output side of the attachment, wherein the output side has the output element, fastening means are arranged which are compatible with the fastening device and comprise a support body for supporting the support surface of the fastening device and a counter-locking contour for engaging the at least one locking contour of the fastening device.

21. The attachment according to claim 1 , further comprising at least one anti-rotation contour for supporting the attachment on the hand-held power tool in a rotationally fixed manner with respect to the support axis, wherein the at least one anti-rotation contour is in engagement with a counter-anti-rotation contour of the hand-held power tool when the attachment is mounted on the hand-held power tool.

22. The attachment according to claim 21 , wherein the at least o

Assignees

• Festool Gmbh

Inventors

• Allgaier Benjamin
• Seiler Peter
• Lautenschläger Alexander

Classifications

• B25H1/0078 Primary

  Guiding devices for hand tools · CPC title

• B25F5/026

  in the form of an auxiliary handle (B25F5/024 takes precedence) · CPC title

• B23Q11/0071

  dust collectors for hand tools · CPC title

• B23Q11/0046

  by sucking · CPC title

• B25B21/007

  Attachments for drilling apparatus for screw or nut setting or loosening · CPC title