Right angle impact driver

• US 20050279519A1
• Filed: 06/17/2004
• Published: 12/22/2005
• Est. Priority Date: 06/17/2004
• Status: Abandoned Application

• Current Assignee: One World Technologies (Techtronic Industries Company Limited)
• Original Assignee: One World Technologies (Techtronic Industries Company Limited)
• Inventors: Clark, Weldon H.
• Application Number:
  US10/870,815
• Publication Number:
  US 20050279519A1
• Time in Patent Office: Days
• US Class Current: 173/216
• CPC Class Codes: B25B 21/02 with means for imparting impact to screwdriver blade or nut socket
• CPC Class Codes: B25B 21/026 Impact clutches

Abstract

A hand held power tool has a housing, a motor, a power source, a cam shaft, a hammer, an integrated anvil-gear, a second gear, and an output. The motor is disposed in the housing and has a motor axis. The power source energizes the motor. The cam shaft is driven by the motor and the hammer is driven by the cam shaft. The integrated anvil-gear has an anvil end and a first gear end, and the anvil end is impacted by the hammer. The second gear engages the first gear end and defines an output axis that is at a predefined angle with respect to the motor axis. An output is coupled to the second gear.

Claims

1. An angle impact driver comprising:

a. a hammer; and

b. an integrated anvil-gear having an anvil and a gear, wherein the hammer impacts the anvil.

2. A hand held power tool comprising:

a. a housing;

b. a motor disposed in the housing defining a motor axis;

c. a power source that energizes the motor;

d. a cam shaft driven by the motor;

e. a hammer driven by the cam shaft;

f. an integrated anvil-gear having an anvil end and a first gear end, with the anvil end impacted by the hammer;

g. a second gear engaging the first gear end, wherein the second gear defines an output axis at a predefined angle with respect to the motor axis; and

h. an output coupled with the second gear.

3. The hand held power tool of claim 2, wherein the motor is an electric motor or a pneumatic motor and wherein the power source is a battery, AC line current, or pneumatic pressure.

4. The hand held power tool of claim 2, wherein the first gear end and the second gear are bevel gears.

5. The hand held power tool of claim 4, wherein the first gear end and the second gear are Zerol bevel gears.

6. The hand held power tool of claim 2, wherein the integrated anvil-gear is rotationally supported by a split bearing with two halves.

7. The hand held power tool of claim 2, wherein the second gear is integral with an output shaft.

8. The hand held power tool of claim 2, wherein the predefined angle is approximately ninety degrees.

9. An angle impact driver comprising:

a. a housing;

b. a motor disposed in the housing defining a motor axis;

c. a power source that energizes the motor;

d. a transmission driven by the motor;

e. a cam shaft coupled with the transmission;

f. a hammer axially aligned with the cam shaft, wherein the hammer is driven rotationally and axially by the cam shaft;

g. an integrated anvil-gear rotationally impacted by the hammer and having an anvil end and a first gear end;

h. a second gear engaging the first gear end, wherein the second gear defines an output axis at a predefined angle with respect to the motor axis; and

i. an output coupled with the second gear.

10. The angle impact driver of claim 9, wherein the motor is an electric motor or a pneumatic motor and wherein the power source is a battery, AC line current, or pneumatic pressure.

11. The angle impact driver of claim 9, wherein the transmission further comprises:

a. a sun gear driven by the motor; and

b. a plurality of planet gears driven by the sun gear, wherein the plurality of planet gears engage a ring gear and are rotatably mounted to a carrier, and wherein the cam shaft is coupled with the carrier for rotation with the carrier.

12. The angle impact driver of claim 9, wherein the first gear end and the second gear are bevel gears.

13. The angle impact driver of claim 12, wherein the first gear end and the second gear are Zerol bevel gears.

14. The angle impact driver of claim 9, wherein the integrated anvil-gear is rotationally supported by a split bearing with two halves.

15. The angle impact driver of claim 9, wherein the second gear is integral with an output shaft.

16. The angle impact driver of claim 9, wherein the predefined angle is substantially ninety degrees.

17. A power tool for tightening and loosening fasteners comprising:

a. a motor defining a motor axis;

b. a transmission driven by the motor;

c. a hammer coupled with the transmission;

d. an integrated anvil-gear having an anvil at a first end and a first gear at a second end, with the anvil impacted by the hammer;

e. a second gear engaging the first gear, wherein the second gear defines an output axis at a predefined angle with respect to the motor axis; and

f. an output coupled with the second gear.

18. The power tool of claim 17, wherein the first and second gears are Zerol bevel gears.

19. The power tool of claim 17, wherein the integrated anvil-gear is rotationally supported by a split bearing with two halves.

20. The power tool of claim 17, wherein the second gear is integral with an output shaft.