Lock Device for Power Tool Adjustment

Patent metadata

Field	Value
Publication number	US-2018281135-A1
Application number	US-201715478411-A
Country	US
Kind code	A1
Filing date	Apr 4, 2017
Priority date	Apr 4, 2017
Publication date	Oct 4, 2018
Grant date	—

Abstract

A base assembly for a power tool, such as a router, includes a base member, an adjustment mechanism, and a lock member. The base member is configured to accept a motor housing of the power tool. The adjustment mechanism is configured to adjust a position of the motor housing relative to the base member via rotation of a first contact portion of the adjustment mechanism. The lock member is moveable relative to the adjustment mechanism between a first position that prevents rotation of the adjustment mechanism and a second position that permits rotation of the adjustment mechanism. The lock member includes a second contact portion positioned proximate to the first contact portion and configured to be actuated to position the lock member in the second position. The position of the motor housing is adjusted by simultaneously actuating the first contact portion and the second contact portion.

First claim

What is claimed is:

1 . A base assembly for a power tool, comprising:
a base member configured to accept a motor housing of the power tool; an adjustment mechanism attached to the base member and configured to adjust a position of the motor housing relative to the base member; and a lock member attached to the base member, the lock member moveable relative to the adjustment mechanism between a first position that prevents rotation of the adjustment mechanism and a second position that permits rotation of the adjustment mechanism, wherein the adjustment mechanism includes a first contact portion configured to be actuated to rotate the adjustment mechanism, wherein the lock member includes a second contact portion positioned proximate to the first contact portion and configured to be actuated to position the lock member in the second position, the position of the motor housing adjusted by simultaneous actuation of the first contact portion and the second contact portion by a user.

2 . The base assembly of claim 1 , wherein the lock member has a locking portion that prevents rotation of the adjustment mechanism by contact between the locking portion and a portion of the first contact portion when the lock member is in the first position.

3 . The base assembly of claim 2 , wherein the locking portion is spaced from the first contact portion when the lock member is in the second position.

4 . The base assembly of claim 2 , wherein the first contact portion is a peripheral surface of the adjustment mechanism and wherein the locking portion is configured to engage a geometric pattern in the peripheral surface.

5 . The base assembly of claim 4 , wherein the locking portion is further configured to engage the geometric pattern at a plurality of positions spaced about the peripheral surface.

6 . The base assembly of claim 4 , wherein the geometric pattern includes a plurality of straight grooves and wherein the locking portion includes straight detent that engages in a corresponding one of the straight grooves.

7 . The base assembly of claim 2 , wherein the first contact portion is a peripheral surface of the adjustment mechanism and wherein the locking portion includes a deformable pad configured to at least partially deform on the peripheral surface.

8 . The base assembly of claim 2 , wherein the first contact portion is a peripheral surface of the adjustment mechanism and wherein the locking portion includes a friction surface configured to generate a frictional force that opposes rotation of the adjustment mechanism.

9 . The base assembly of claim 1 , further comprising a resilient member configured to bias the lock member in the first position.

10 . The base assembly of claim 1 , wherein the adjustment mechanism is rotatable about a rotation axis passing through the adjustment mechanism and concentric with the first contact portion and wherein the lock member is movable via rotation about a pivot axis spaced from and parallel to the rotation axis.

11 . The base assembly of claim 1 , wherein the lock member is moveable via translation along a linear path or a curvilinear path.

12 . The base assembly of claim 2 , wherein the adjustment mechanism is rotatable about a rotation axis passing through the adjustment mechanism and concentric with the first contact portion and wherein the lock member has a planar body portion disposed perpendicular to the rotation axis of the adjustment mechanism.

13 . The base assembly of claim 12 , wherein the locking portion is disposed on a first tab extending from a first side of the planar body portion and wherein the second contact portion is disposed on a second tab extending from a second side of the planar body portion in a direction opposite the extension of the first tab.

14 . The base assembly of claim 12 , wherein:
the adjustment mechanism includes an adjusting portion extending concentrically along the rotation axis, the adjusting portion configured to cooperate with the motor housing to adjust the position of the motor housing, and the planar body portion of the lock member defines a central opening through which the adjusting portion extends, the central opening sized so as to provide clearance to the adjusting portion in the first and second positions of the lock member.

15 . The base assembly of claim 13 , wherein:
the first contact portion has a first contour, the second contact portion has a second contour defined by the second tab, and the second contour is aligned with the portion of the first contour configured to be actuated by the user when viewed in a plane normal to the rotation axis and when the lock member is in the first position.

16 . The base assembly of claim 13 , wherein:
the first contact portion has a first contour, the second contact portion has a second contour defined by the second tab, and the second contour is one of radially inward or radially outward from the portion of the first contour configured to be actuated by the user when viewed in a plane normal to the rotation axis and when the lock member is in the first position.

17 . The base assembly of claim 5 , wherein:
the locking portion includes a first locking portion disposed on a first locking tab extending from the lock member and a second locking portion disposed on a second locking tab extending form the lock member, the second tab spaced from the first tab about a periphery of the lock member, and the lock member has a clearance profile between the first and second locking tabs, the clearance profile providing a predetermined clearance to a tool attached to the power tool.

18 . The base assembly of claim 1 , wherein the base member has a first opening extending therethrough and defining an axial direction, a portion of the motor housing accepted within the first opening so as to cooperate with the adjustment mechanism.

19 . The base assembly of claim 18 , further comprising a door positioned on a periphery of the base member, the door moveable to cover a second opening through the periphery of the base member in a first position and partially expose the second opening in a second position,
wherein the adjustment mechanism and the lock member are moveable together with the door without movement relative to the door as the door moves between the first and second positions.

20 . The base assembly of claim 1 , wherein the first contact portion and the second contact portion are actuated simultaneously by a single digit of the user to adjust the position of the motor housing.

Assignees

• Bosch Gmbh Robert

Inventors

• Wierzchon Peter Jack
• Barrett Craig Thomas

Classifications

• B23Q9/0028 Primary

  the guide means being fixed only on the machine · CPC title

• B27C5/10 Primary

  Portable hand-operated wood-milling machines; Routers · CPC title

• B23Q16/001

  Stops, cams, or holders therefor · CPC title

• B25F5/021

  with guiding devices (guiding devices for hand tools on stands or supports B25H1/0078) · CPC title

• B25F5/003

  Stops for limiting depth in rotary hand tools (for drilling tools: B23B49/003) · CPC title