Angle impact tool

Patent metadata

Field	Value
Publication number	US-9550284-B2
Application number	US-201414251567-A
Country	US
Kind code	B2
Filing date	Apr 12, 2014
Priority date	Feb 23, 2011
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

An angle impact tool includes a handle assembly extending along a first axis, a prime mover in the handle, an output shaft rotatable about the first axis, and a work attachment connected to the handle assembly. An output drive is supported in the work attachment for rotation about an output axis perpendicular to the first axis. A gear assembly including a spur gear is positioned within the work attachment to transfer torque from the prime mover about the first axis to the output drive about the output axis. An impact mechanism is positioned within the work attachment and includes a hammer and an anvil. The hammer rotates under the influence of the prime mover and is operable to periodically deliver an impact load to the anvil. The output drive rotates about the output axis under the influence of the impact load being transmitted to the output drive by the anvil.

First claim

The invention claimed is:

1. An angle impact tool comprising:
a handle assembly extending along a first axis and supporting a motor, the motor including a shaft configured to rotate about the first axis;
a work attachment coupled to the handle assembly, the work attachment comprising:
an impact mechanism including an anvil configured to rotate about a second axis that is non-parallel to the first axis and a hammer configured to rotate about the second axis to periodically deliver an impact load to the anvil to cause rotation of the anvil about the second axis; and
an angle housing and an angle housing plate coupled to one another to cooperatively support the impact mechanism, the angle housing plate abutting the angle housing and separable from the angle housing perpendicular to the first axis;

wherein the angle housing is formed to include a first bore extending along the first axis, a second bore extending along the second axis, and a third bore extending along a third axis that is parallel to the second axis, the third bore being positioned between the first and second bores; and
wherein the angle housing plate is formed to include (i) a fourth bore that is concentric with the second bore of the angle housing and (ii) a fifth bore that is concentric with the third bore of the angle housing.

2. The angle impact tool of claim 1 , wherein the hammer is further configured to reciprocally translate along the second axis as it rotates about the second axis.

3. The angle impact tool of claim 1 , wherein the first axis is parallel to the separation between the angle housing plate and angle housing.

4. The angle impact tool of claim 3 , wherein the first axis is spaced apart from the separation between the angle housing plate and angle housing.

5. The angle impact tool of claim 4 , wherein the first axis intersects the second axis between (i) a position of the anvil along the second axis and (ii) separation between the angle housing plate and angle housing.

6. The angle impact tool of claim 1 , wherein the angle housing plate also abuts the angle housing perpendicular to the first axis.

7. The angle impact tool of claim 6 , wherein the second axis is parallel where the angle housing plate also abuts the angle housing.

8. The angle impact tool of claim 1 , wherein the work attachment further comprises a gear assembly supported by the angle housing and the angle housing plate, the gear assembly configured to transfer rotation from the shaft of the motor to the hammer of the impact mechanism.

9. The angle impact tool of claim 1 , wherein the second bore of the angle housing and the fourth bore of the angle housing plate cooperate to support the impact mechanism.

10. The angle impact tool of claim 1 , wherein the work attachment further comprises a gear assembly supported by the angle housing and the angle housing plate, the gear assembly including a first bevel gear positioned in the first bore of the angle housing and configured to rotate about the first axis and a second bevel gear positioned in the third bore of the angle housing and configured to rotate about the third axis, wherein the second bevel gear meshes with the first bevel gear.

11. The angle impact tool of claim 1 , wherein the angle housing plate is removably coupled to the angle housing by a plurality of fasteners.

12. The angle impact tool of claim 11 , wherein each of the plurality of fasteners extends through a corresponding aperture formed in the angle housing plate and is received in a corresponding bore formed in the angle housing.

13. A work attachment comprising:
a housing extending along an input axis and configured to be coupled to a motorized tool including a rotatable output shaft;
an output drive supported by the housing and configured to rotate about an output axis that is non-parallel to the input axis;
an impact mechanism supported in the housing and configured to drive rotation of the output drive about the output axis, the impact mechanism including a hammer configured to rotate about the output axis to periodically deliver an impact load to an anvil to cause rotation of the anvil about the output axis; and
a gear assembly supported in the housing and configured to be coupled to the rotatable output shaft of the motorized tool such that rotation of the output shaft about the input axis drives rotation of the hammer about the output axis;
wherein the housing is partitioned perpendicular to the output axis;
wherein the housing is formed to include a first bore extending along the input axis, a second bore extending along the output axis, and a third bore extending along a third axis that is parallel to the output axis, the third bore being positioned between the first and second bores; and
a housing plate formed to include (i) a fourth bore that is concentric with the second bore of the housing and (ii) a fifth bore that is concentric with the third bore of the housing.

14. The work attachment of claim 13 , wherein the input axis is parallel to and spaced apart from the partitioned housing.

15. The work attachment of claim 14 , wherein the input axis intersects the output axis between (i) a position of the output drive along the output axis and (ii) a point at which the output axis intersects the partitioned housing.

16. The work attachment of claim 13 , wherein the housing is separable from the housing plate and is removably coupled to the housing by a plurality of fasteners.

17. The work attachment of claim 16 , wherein:
the housing includes a shoulder extending away from the output drive and perpendicular to the input axis; and
the housing plate abuts the shoulder when the housing plate is removably coupled to the housing.

18. The work attachment of claim 17 , wherein the housing includes a first end supporting the output drive and a second end configured to be coupled to the motorized tool, the shoulder being located closer to the second end of the housing than the first end of the housing.

Assignees

• Ingersoll-Rand Company

Inventors

• Seith Warren Andrew
• Taylor Lucas James

Classifications

• B25B21/026 Primary

  Impact clutches · CPC title

• B25F5/02

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

• B25B21/023

  for imparting an axial impact, e.g. for self-tapping screws · CPC title

• B25B21/02 Primary

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