Impact tool

Patent metadata

Field	Value
Publication number	US-2021237249-A1
Application number	US-202117167615-A
Country	US
Kind code	A1
Filing date	Feb 4, 2021
Priority date	Feb 4, 2020
Publication date	Aug 5, 2021
Grant date	—

Abstract

An impact tool includes an electric motor and a housing containing the electric motor, the housing including a battery receptacle. The battery receptacle includes an isolation member configured to selectively and detachably couple to a battery pack to electrically connect the battery pack to the electric motor. The isolation member includes opposed rails configured to be received into sliding engagement with channels formed in the housing. The battery receptacle also includes an elastomeric damper supported within the housing. During operation of the impact tool, the isolation member is configured to translate relative to the housing and impact the elastomeric damper which, in turn, is configured to attenuate the transmission of vibration from the housing to the battery pack.

First claim

What is claimed is:

1 . An impact tool comprising:
an electric motor; a housing containing the electric motor; and a battery receptacle including
an isolation member configured to selectively and detachably couple to a battery pack to electrically connect the battery pack to the electric motor, the isolation member including opposed rails configured to be received into sliding engagement with channels formed in the housing, and
an elastomeric damper supported within the housing;
wherein during operation of the impact tool, the isolation member is configured to translate relative to the housing and impact the elastomeric damper which, in turn, is configured to attenuate transmission of vibration from the housing to the battery pack.

2 . The impact tool of claim 1 , wherein the battery receptacle further includes a pair of friction members, each friction member having a u-shaped cross-section and being coupled to a respective rail of the opposed rails.

3 . The impact tool of claim 1 , wherein the elastomeric damper is a first elastomeric damper, and wherein the battery receptacle further includes a second elastomeric damper supported within the housing and configured to attenuate transmission of vibration from the housing to the battery pack.

4 . The impact tool of claim 3 , wherein the isolation member defines a first stop surface that opposes the first elastomeric damper and a second stop surface that opposes the second elastomeric damper.

5 . The impact tool of claim 3 , wherein the housing defines a first damper seat configured to support the first elastomeric damper and an opposed second damper seat configured to support the second elastomeric damper.

6 . The impact tool of claim 1 , wherein the isolation member includes a pair of sidewalls, a top wall, and an end wall, and wherein the opposed rails project laterally outward from the sidewalls.

7 . The impact tool of claim 6 , wherein the pair of sidewalls, the top wall, and the end wall define a cavity configured to receive a connecting structure of the battery pack.

8 . The impact tool of claim 1 , wherein the housing defines a longitudinal axis, and wherein the rails are configured to slide within the channels along a direction of the longitudinal axis.

9 . An impact tool comprising:
an electric motor; a housing containing the electric motor; and a battery receptacle including an isolation member configured to selectively and detachably couple to a battery pack to electrically connect the battery pack to the electric motor, the isolation member including opposed posts configured to be received into cup-shaped elastomeric dampers supported within the housing.

10 . The impact tool of claim 9 , wherein the housing defines opposed damper pockets that receive the cup-shaped elastomeric dampers.

11 . The impact tool of claim 9 , wherein each post defines a y-shaped cross-section, and wherein each cup-shaped elastomeric damper defines a central bore having a corresponding y-shaped cross-section.

12 . The impact tool of claim 9 , wherein the isolation member includes a pair of sidewalls, a top wall, an end wall, and a central ridge protruding from the top wall, and wherein the opposed posts project laterally outward from the central ridge.

13 . The impact tool of claim 12 , wherein the pair of sidewalls, the top wall, and the end wall define a cavity configured to receive a connecting structure of the battery pack.

14 . The impact tool of claim 13 , wherein the top wall defines an aperture, and wherein the impact tool further includes a terminal block that extends through the aperture to reside within the cavity.

15 . The impact tool of claim 12 , wherein the cup-shaped elastomeric dampers are configured to attenuate transmission of vibrations from the housing to the battery pack along three orthogonal directions.

16 . An impact tool comprising:
a housing including a motor housing portion and a D-shaped handle portion coupled to the motor housing portion, the handle portion including a grip spaced from the motor housing portion to define an aperture between the grip and the motor housing portion; an electric motor positioned within the motor housing portion and including a motor shaft; a drive assembly configured to convert a continuous rotational input from the motor shaft to consecutive rotational impacts upon a workpiece; and a first battery receptacle and a second battery receptacle each extending from the handle portion and each configured to selectively and detachably couple to a battery pack.

17 . The impact tool of claim 16 , wherein the first battery receptacle and the second battery receptacle each include
an isolation member configured to selectively and detachably couple to the battery pack to electrically connect the battery pack to the electric motor, the isolation member including opposed rails configured to be received into sliding engagement with channels formed in the housing, and an elastomeric damper supported within the housing; wherein during operation of the impact tool, each isolation member is configured to translate relative to the housing and impact the corresponding elastomeric damper which, in turn, is configured to attenuate transmission of vibration from the housing to the battery pack.

18 . The impact tool of claim 17 , wherein each battery receptacle further includes a pair of friction members, each friction member having a u-shaped cross-section and being coupled to a respective rail of the opposed rails.

19 . The impact tool of claim 17 , wherein each isolation member includes a pair of sidewalls, a top wall, and an end wall, and wherein the opposed rails project laterally outward from the sidewalls.

20 . The impact tool of claim 17 , wherein the housing defines a longitudinal axis, and wherein the rails are configured to slide within the channels along a direction of the longitudinal axis.

21 . An impact tool comprising:
an electric motor; a housing including a motor housing portion containing the electric motor, and a handle portion coupled to the motor housing portion, a U-shaped channel defined within the handle portion; an elastomeric damper received into the U-shaped channel; and a circuit board having at least three edges received into grooves formed in the elastomeric damper; wherein the elastomeric damper is configured to attenuate vibration transmitted to the circuit board along a longitudinal direction of the housing, along a lateral direction of the housing perpendicular to the longitude direction, and along a vertical direction of the housing orthogonal to the longitudinal and lateral directions.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Fischer Scott R
• Brown Evan
• Sande Michael R

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• B25F5/006 Primary

  Vibration damping means · CPC title

• B25F5/02

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title

• B25B21/02

  with means for imparting impact to screwdriver blade or nut socket · CPC title

• B25D2250/121

  Housing details · CPC title