Oscillating multi-tool system

Patent metadata

Field	Value
Publication number	US-10940605-B2
Application number	US-201816200111-A
Country	US
Kind code	B2
Filing date	Nov 26, 2018
Priority date	May 6, 2013
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

A power tool includes a housing and a motor disposed in the housing. The motor has an axial face and a motor shaft extending from the axial face. The power tool also includes a spindle driven by the motor about an output axis, a motor plate having a central opening defining an inner surface of the motor plate, and a tolerance ring coupled to the inner surface of the motor plate. The tolerance ring has deformable waves. The motor plate is coupled to the motor by engagement of the deformable waves with the motor to take up tolerances between the motor plate and the motor.

First claim

What is claimed is:

1. A power tool, comprising:
a housing;
a motor disposed in the housing, the motor having an axial face and a motor shaft extending from the axial face;
a spindle driven by the motor about an output axis;
a motor plate having a central opening defining an inner surface of the motor plate;
a tolerance ring coupled to the inner surface of the motor plate, the tolerance ring having deformable waves, wherein the motor plate is coupled to the motor by engagement of the deformable waves with the motor to take up tolerances between the motor plate and the motor.

2. The power tool of claim 1 , wherein the motor plate engages a boss on the motor.

3. The power tool of claim 1 , wherein the motor plate is spaced no closer than 0.020 inches from the axial face of the motor.

4. The power tool of claim 1 , further comprising:
an eccentric shaft coupled to the motor shaft; and
a motor plate bearing disposed between the eccentric shaft and the motor plate such that the eccentric shaft is supported during rotation.

5. The power tool of claim 4 , wherein the eccentric shaft includes a body portion receiving the motor shaft and an eccentric portion extending from the body portion, wherein the motor plate bearing is disposed on an outer surface of the body portion of the eccentric shaft.

6. The power tool of claim 4 , further comprising a fork for converting rotational motion of the eccentric shaft into oscillating motion of the spindle.

7. The power tool of claim 1 , wherein the motor plate includes at least one projection engaged by the housing to inhibit rotation of the motor plate relative to the housing.

8. The power tool of claim 1 , further comprising shoulder pins extending from the axial face of the motor, wherein the motor plate includes recesses extending radially inwards towards the motor shaft, wherein the shoulder pins are disposed in the recesses to inhibit relative rotation between the motor and the motor plate.

9. The power tool of claim 1 , further comprising an elastomeric member disposed at a distal end portion of the motor opposite from the motor plate, the elastomeric member disposed between the distal end portion of the motor and the housing to support the distal end portion of the motor relative to the housing.

10. A power tool, comprising:
a housing;
a motor disposed in the housing, the motor having an axial face and a motor shaft extending from the axial face;
a spindle driven by the motor about an output axis;
a motor plate coupled to the motor;
an eccentric shaft coupled to the motor shaft; and
a motor plate bearing disposed between the eccentric shaft and the motor plate such that the eccentric shaft is supported by the motor plate bearing during rotation.

11. The power tool of claim 10 , wherein the motor plate is inhibited against rotation relative to the housing.

12. The power tool of claim 10 , wherein the eccentric shaft includes a body portion receiving the motor shaft and an eccentric portion extending from the body portion, wherein the motor plate bearing is disposed on an outer surface of the body portion of the eccentric shaft.

13. The power tool of claim 12 , wherein an aperture is formed in an outer surface of the body portion to counterbalance the eccentric portion.

14. The power tool of claim 13 , wherein the motor plate bearing is disposed around the body portion of the eccentric shaft and substantially covers the aperture to inhibit debris from filling the aperture.

15. The power tool of claim 12 , further comprising a fork for converting rotational motion of the eccentric shaft into oscillating motion of the spindle, and wherein an eccentric bearing is disposed on the eccentric portion and in driving engagement with the fork.

16. The power tool of claim 10 , wherein the motor plate bearing includes an outer race that engages the motor plate and an inner race that engages the eccentric shaft.

17. The power tool of claim 10 , wherein the motor plate bearing protrudes axially beyond an outer face of the motor plate such that axial loads act on the motor plate bearing rather than the motor plate.

18. A power tool, comprising:
a housing;
a motor disposed in the housing, the motor having an axial face and a motor shaft extending from the axial face;
a spindle driven by the motor about an output axis;
an eccentric shaft coupled to the motor shaft; and
a fork configured to convert eccentric rotational motion of the eccentric shaft into oscillating motion of the spindle;
wherein the eccentric shaft includes a body portion receiving the motor shaft and an eccentric portion extending from the body portion, wherein an aperture is formed in an outer surface of the body portion to counterbalance the eccentric portion.

19. The power tool of claim 18 , further comprising:
a motor plate coupled to the motor; and
a motor plate bearing disposed between the body portion of the eccentric shaft and the motor plate such that the eccentric shaft is supported during rotation.

20. The power tool of claim 18 , further comprising an eccentric bearing disposed on the eccentric portion and between the eccentric portion and the fork.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Thorson Troy C
• Wackwitz Jeffrey M
• Doberstein Emily
• Wekwert James

Classifications

• B24B45/006

  Quick mount and release means for disc-like wheels, e.g. on power tools · CPC title

• B23B31/4073

  Gripping the work or tool between planes almost perpendicular to the axis · CPC title

• B27B5/30 Primary

  for mounting or securing saw blades or saw spindles · CPC title

• B24B23/04

  with oscillating grinding tools; Accessories therefor · CPC title

• Y10T279/33

  Member applies axial force component · CPC title