Power tool including a battery pack isolation system

• US 10,232,479 B2
• Filed: 05/06/2014
• Issued: 03/19/2019
• Est. Priority Date: 05/06/2013
• Status: Active Grant

• Current Assignee: Milwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
• Original Assignee: Milwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
• Inventors: Thorson, Troy C., Wackwitz, Jeffrey M., Weber, Andrew J.
• Primary Examiner(s): Truong, Thanh
• Assistant Examiner(s): Wittenschlaeger, Thomas
• Application Number:
  US14/270,547
• Publication Number:
  US 20140326477A1
• Time in Patent Office: 1,778 Days
• Field of Search: 1731621
• CPC Class Codes: B23Q 11/0032 Arrangements for preventing or isolating vibrations in parts of the machine B23B29/022, B23D47/005 take precedence; means for damping or suppressing vibrations, in general F16F
• CPC Class Codes: B25F 5/006 Vibration damping means
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A power tool includes a housing, a motor positioned substantially within the housing, a drive mechanism supported by the housing and coupled to the motor, a battery pack electrically coupled to the motor, and an isolation system. The isolation system includes an interface member positioned substantially within the housing. The interface member receives a portion of the battery pack to electrically couple the battery pack to the motor. The isolation system also includes a plurality of isolators coupled between the housing and the interface member to isolate the battery pack from the housing during operation of the power tool.

Claims

1. A power tool comprising:

a housing including two clamshell halves defining a cavity;

a motor positioned within the housing;

a drive mechanism supported by the housing and coupled to the motor;

a battery pack electrically coupled to the motor; and

an isolation system including

an interface member having opposing sidewalls, each sidewall defining an outwardly facing surface facing away from the other sidewall and an inwardly facing surface facing toward the other sidewall, the outwardly and inwardly facing surfaces of the interface member positioned within the cavity of the housing such that the outwardly facing surfaces are located between the two clamshell halves, the interface member receiving a portion of the battery pack to electrically couple the battery pack to the motor, and

a plurality of isolators coupled between the housing and the interface member to isolate the battery pack from the housing during operation of the power tool;

wherein each sidewall of the interface member includes a plurality of posts extending from the outwardly facing surface, and wherein each isolator is received on one of the plurality of posts.

2. The power tool of claim 1, wherein the interface member includes an upper surface connecting the opposing sidewalls, and wherein at least some of the plurality of isolators are located between each sidewall and the housing.

3. The power tool of claim 2, wherein the interface member includes a projection extending from the upper surface of the interface member, wherein the projection includes a post, and wherein one of the plurality of isolators is received on the post of the projection.

4. The power tool of claim 1, wherein each isolator is an annular member.

5. The power tool of claim 4, wherein each isolator has a double-taper design where the isolator decreases in diameter from a mid portion of the isolator to both outer faces of the isolator.

6. The power tool of claim 1, wherein the interface member includes an elastomeric member that engages the battery pack.

7. The power tool of claim 6, wherein the interface member includes two parallel, spaced apart rails that slidably receive the battery pack.

8. The power tool of claim 7, wherein the elastomeric member is supported by the interface member adjacent one of the two rails, and wherein the elastomeric member is positioned at an end of the interface member opposite from an open end through which the battery pack is slidably received.

9. The power tool of claim 1, wherein the isolation system includes a terminal block having a plurality of terminal connectors that electrically couples the battery pack to the motor, and wherein the terminal block is supported by the interface member so that the plurality of terminal connectors is positioned within the cavity of the housing such that the plurality of terminal connectors is located between the two clamshell halves.

10. The power tool of claim 1, wherein the portion of the battery pack is positioned within the cavity of the housing such that the portion of the battery pack is located between the two clamshell halves when the interface member receives the portion of the battery pack.

11. The power tool of claim 1, wherein a majority of the isolation system is positioned within the cavity of the housing.

12. The power tool of claim 11, wherein the entire isolation system is positioned within the cavity of the housing.

13. An isolation system for a power tool, the power tool including a housing having two clamshell halves defining a cavity, a motor positioned within the housing, a drive mechanism supported by the housing and coupled to the motor, and a battery pack electrically coupled to the motor, the isolation system comprising:

an interface member having opposing sidewalls, each sidewall defining an outwardly facing surface facing away from the other sidewall and an inwardly facing surface facing toward the other sidewall, the outwardly and inwardly facing surfaces of the interface member positioned within the cavity of the housing such that the outwardly facing surfaces are located between the two clamshell halves, the interface member configured to receive a portion of the battery pack to electrically couple the battery pack to the motor; and

a plurality of isolators coupled between the housing and the interface member to isolate the battery pack from the housing during operation of the power tool;

wherein each sidewall of the interface member includes a plurality of posts extending from the outwardly facing surface, and wherein each isolator is received on one of the plurality of posts.

14. The isolation system of claim 13, wherein the interface member includes an upper surface connecting the opposing sidewalls, and wherein at least some of the plurality of isolators are located between each sidewall and the housing.

15. The isolation system of claim 14, wherein the interface member includes a projection extending from the upper surface of the interface member, wherein the projection includes a post, and wherein one of the plurality of isolators is received on the post of the projection.

16. The isolation system of claim 13, wherein each isolator is an annular member.

17. The isolation system of claim 16, wherein each isolator has a double-taper design where the isolator decreases in diameter from a mid portion of the isolator to both outer faces of the isolator.

18. The isolation system of claim 13, wherein the interface member includes an elastomeric member that engages the battery pack.

19. The isolation system of claim 18, wherein the interface member includes two parallel, spaced apart rails configured to slidably receive the battery pack, wherein the elastomeric member is supported by the interface member adjacent one of the two rails, and wherein the elastomeric member is positioned at an end of the interface member opposite from an open end through which the battery pack is slidably received.

20. The isolation system of claim 13, wherein the isolation system includes a terminal block having a plurality of terminal connectors configured to electrically couple the battery pack to the motor, and wherein the terminal block is supported by the interface member so that the plurality of terminal connectors is positioned within the cavity of the housing such that the plurality of terminal connectors is located between the two clamshell halves.

21. An isolation system for a power tool, the power tool including a housing having two clamshell halves defining a cavity, a motor positioned within the housing, a drive mechanism supported by the housing and coupled to the motor, and a battery pack electrically coupled to the motor, the isolation system comprising:

an interface member having opposing sidewalls, each sidewall defining an outwardly facing surface facing away from the other sidewall and an inwardly facing surface facing toward the other sidewall, the outwardly and inwardly facing surfaces of the interface member positioned within the cavity of the housing such that the outwardly facing surfaces are located between the two clamshell halves, the interface member configured to receive a portion of the battery pack to electrically couple the battery pack to the motor; and

a plurality of isolators coupled between the housing and the interface member to isolate the battery pack from the housing during operation of the power tool;

wherein the interface member includes an upper surface connecting the opposing sidewalls, and wherein at least some of the plurality of isolators are located between each sidewall and the housing; and

wherein the interface member includes a projection extending from the upper surface of the interface member, wherein the projection includes a post, and wherein one of the plurality of isolators is received on the post of the projection.