Offset impact mechanism for a hammer tool

Patent metadata

Field	Value
Publication number	US-12447597-B2
Application number	US-202418408083-A
Country	US
Kind code	B2
Filing date	Jan 9, 2024
Priority date	Apr 26, 2021
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

An impact mechanism for an impact tool having a housing with a housing longitudinal axis, wherein the impact mechanism includes an impact mechanism longitudinal axis that is offset and substantially perpendicular to the housing longitudinal axis. The impact mechanism includes a gear carrier adapted to be driven by a motor of the impact tool to rotate about the impact mechanism longitudinal axis, a hammer slidably coupled to the gear carrier and rotatable about the impact mechanism longitudinal axis, the hammer includes a radial surface with a hammer lug extending therefrom, and an intermediate bit adapted to receive impact force from the hammer lug and transfer impact force to a tool bit.

First claim

What is claimed is:

1. An impact hammer tool, comprising:
a housing having a bore extending in a first direction;
a motor disposed in the housing and having a motor axis that is substantially perpendicular to the first direction;
a tool bit operably coupled to and extending from the housing;
a hammer operably coupled to the motor; and
an intermediate bit slidably disposed in the bore and adapted to receive an impact force from the hammer when the motor is operated and impact the tool bit.

2. The impact hammer tool of claim 1 , wherein the housing further includes a battery interface and the motor is adapted to be powered by a rechargeable battery removably coupled to the battery interface.

3. The impact hammer tool of claim 1 , wherein the intermediate bit includes a radial protrusion adapted to restrict the intermediate bit from moving out of the bore in a direction towards the tool bit.

4. The impact hammer tool of claim 1 , wherein the housing has a housing longitudinal axis and the intermediate bit has a bit longitudinal axis substantially aligned with the housing longitudinal axis, and the intermediate bit is adapted to move axially along the housing longitudinal axis.

5. The impact hammer tool of claim 1 , wherein the hammer has a radial surface with hammer lugs.

6. The impact hammer tool of claim 5 , wherein the hammer is adapted to rotate when the motor is operated and the intermediate bit is adapted to receive the impact force from the hammer lug and transfer the impact force to the tool bit.

7. The impact hammer tool of claim 6 , further comprising a gear carrier operably coupled to and adapted to be driven by the motor.

8. The impact hammer tool of claim 7 , wherein the gear carrier includes a gear carrier ball groove adapted to receive a ball and the hammer includes a hammer ball groove disposed in a hammer aperture that is adapted to receive the ball.

9. The impact hammer tool of claim 8 , further comprising a biasing member adapted to bias the hammer away from the motor.

10. The impact hammer tool of claim 1 , wherein the tool bit is a chisel bit, a cutter bit, a scraper bit, a punch bit, or a hammer bit.

11. An impact hammer tool, comprising:
a housing having a bore extending in a first direction;
a motor disposed in the housing;
a tool bit operably coupled to and extending from the housing; and
an impact mechanism operably coupled to the motor and having an impact mechanism longitudinal axis that is substantially perpendicular to the first direction, wherein the impact mechanism includes an intermediate bit having opposing first and second ends, and the first end has a conical type shape, wherein the intermediate bit is slidably disposed in the bore and the first end is adapted to apply an impact force to the tool bit when the motor is operated, and wherein the bore has a shape that cooperatively matches the conical type shape of the first end.

12. The impact hammer tool of claim 11 , wherein the housing further includes a battery interface and the motor is adapted to be powered by a rechargeable battery removably coupled to the battery interface.

13. The impact hammer tool of claim 11 , wherein the intermediate bit includes a radial protrusion adapted to restrict the intermediate bit from moving out of the bore in a direction towards the tool bit.

14. The impact hammer tool of claim 11 , wherein the housing has a housing longitudinal axis and the intermediate bit has a bit longitudinal axis substantially aligned with the housing longitudinal axis, and the intermediate bit is adapted to move axially along the housing longitudinal axis.

15. The impact hammer tool of claim 11 , wherein the impact mechanism includes a hammer that is adapted to rotate about the impact mechanism longitudinal axis when the motor is operated, and the intermediate bit is adapted to receive the impact force from the hammer and transfer the impact force to the tool bit.

16. The impact hammer tool of claim 11 , wherein the tool bit is a chisel bit, a cutter bit, a scraper bit, a punch bit, or a hammer bit.

Assignees

• Snap On Incorporated

Inventors

• Beer Joshua M

Classifications

• B25D11/066

  using centrifugal or rotary impact elements · CPC title

• B25D2217/0015

  Anvils · CPC title

• B25D2211/003

  Crossed drill and motor spindles · CPC title

• B25D17/06

  Hammer pistons; Anvils {; Guide-sleeves for pistons} · CPC title

• B25B21/02

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