Quick disconnect burnisher pad driver

• US 6,651,286 B2
• Filed: 01/07/2002
• Issued: 11/25/2003
• Est. Priority Date: 01/07/2002
• Status: Expired due to Fees

• Current Assignee: Tennant Company
• Original Assignee: Tennant Company
• Inventors: Pierce, Paul M.
• Primary Examiner(s): Warden, Sr., Robert J.
• Assistant Examiner(s): KARLS, SHAY LYNN
• Application Number:
  US10/041,922
• Publication Number:
  US 20030126729A1
• Time in Patent Office: 687 Days
• Field of Search: 15/491, 15/98, 151/80, 152/30, 153/85, 153/403, 153/404
• US Class Current: 15/98
• CPC Class Codes: A47L 11/164 Parts or details of the brushing tools
• CPC Class Codes: A47L 11/4038 Disk shaped surface treating tools
• CPC Class Codes: A47L 11/4069 Driving or transmission means for the cleaning tools
• CPC Class Codes: B24B 45/006 Quick mount and release means for disc-like wheels, e.g. on power tools
• CPC Class Codes: Y10T 29/47 Burnishing

Abstract

A quick disconnect hub which is secured to the motor drive shaft receives a high pitch threaded pad driver disk to which a burnishing pad is mounted. The hub includes a conically tapered surface, as does the driver disk for centering. A spring-loaded locking pin extends between the burnishing motor and selectively locks the drive hub against rotation for removal of the driver disk by rotating approximately one or two times, thus allowing the removal of the pad driver from the motor and allowing the centered mounting of the burnishing pad to the driver remote from the machine. In a preferred embodiment of the invention, an interlock switch is coupled to the spring-loaded locking pin such that, when the hub is locked against rotation for removal of the driver disk, the switch prevents inadvertent activation of the motor when the hub is locked.

Claims

1. A quick disconnect driver allows the easy replacement of a burnishing pad of a burnishing machine which operates at speeds in excess of about 1500 rpm comprising:

a drive hub including an aperture for securing the drive hub to a drive shaft of a burnishing motor, said drive hub having a conically tapered surface for engaging a driver disk for a burnishing pad;

a driver disk for a burnishing pad having a mating conically tapered surface for engaging said tapered surface of said hub; and

a quick disconnect structure for releasably coupling said driver disk to said hub, wherein said quick disconnect structure comprises mating threads on said hub and driver disk.

2. The driver as defined in claim 1 wherein said quick disconnect structure includes at least one detent formed in one of said hub and driver disk and a spring-loaded locking pin in the other of said hub and driver disk which engages said detent.

3. A quick disconnect driver allows the easy replacement of a burnishing pad of a burnishing machine which operates at speeds in excess of about 1500 rpm comprising:

a drive hub including an aperture for securing the drive hub to a drive shaft of a burnishing motor, said drive hub having a conically tapered surface for engaging a driver disk for a burnishing pad;

a driver disk for a burnishing pad having a mating conically tapered surface for engaging said tapered surface of said hub; and

a quick disconnect structure for releasably coupling said driver disk to said hub, wherein said hub includes at least one locking notch and further including a motor housing and a locking pin extending between said motor housing and said drive hub to engage said notch to selectively lock said hub against rotation to permit said driver disk to be removed for replacing a burnishing pad.

4. The driver as defined in claim 3 and further including an interlock switch mounted to said housing and actuated by said locking pin for preventing actuation of the drive motor when said hub is locked against rotation.

5. A quick disconnect driver assembly for a burnishing machine comprising:

a motor housing;

an electrical motor coupled to said housing and having a drive shaft;

a drive hub including an aperture for securing the drive hub to said drive shaft of said motor;

a driver disk for releasably holding a burnishing pad; and

a quick disconnect structure for releasably coupling said driver disk to said hub, wherein said quick disconnect structure comprises mating threads on said hub and driver disk and wherein said drive hub has a conically tapered surface for engaging said driver disk and said driver disk has a mating conically tapered surface for engaging said tapered surface of said hub.

6. The driver assembly as defined in claim 5 wherein said quick disconnect structure includes a detent formed in said hub and a spring-loaded locking pin in said driver disk.

7. The driver assembly as defined in claim 6 wherein said hub and driver disk include engaging surfaces for transmitting torque from said hub to said driver disk.

8. A burnishing machine which operates at speeds above about 1500 rpm having a pad driver for removal from a drive motor to allow the easy replacement of a burnishing pad comprising:

a motor housing;

an electrical motor coupled to said housing and having a drive shaft;

a drive hub including an aperture for securing the drive hub to said drive shaft of said motor, said drive hub having a conically tapered surface for engaging a driver disk for a burnishing pad;

a driver disk for a burnishing pad having a mating conically tapered surface for engaging said tapered surface of said hub; and

a quick disconnect structure for releasably coupling said driver disk to said hub, wherein said quick disconnect structure comprises mating threads on said hub and driver disk.

9. The burnishing machine as defined in claim 8 wherein said quick disconnect structure includes at least one detent formed in one of said hub and driver disk and a spring-loaded locking pin in the other of said hub and driver disk which engages said detent.

10. A burnishing machine which operates at speeds above about 1500 rpm having a pad driver for removal from a drive motor to allow the easy replacement of a burnishing pad comprising:

a motor housing;

an electrical motor coupled to said housing and having a drive shaft;

a drive hub including an aperture for securing the drive hub to said drive shaft of said motor, said drive hub having a conically tapered surface for engaging a driver disk for a burnishing pad;

a driver disk for a burnishing pad having a mating conically tapered surface for engaging said tapered surface of said hub; and

a quick disconnect structure for releasably coupling said driver disk to said hub, and

a locking pin extending between said motor housing and said drive hub to selectively lock said drive hub against rotation to permit said driver disk to be removed for replacing a burnishing pad.

11. The burnishing machine as defined in claim 10 and further including an interlock switch mounted to said housing and actuated by said locking pin for preventing actuation of the drive motor when said drive hub is locked against rotation.

12. A quick disconnect driver assembly for a burnishing machine comprising:

a motor housing;

an electrical motor coupled to said housing and having a drive shaft;

a drive hub including an aperture for securing the drive hub to said drive shaft of said motor; and

a driver disk for releasably holding a burnishing pad, wherein said driver disk and said hub include mating threads defining a quick disconnect structure for releasably coupling said driver disk to said hub, wherein said drive hub has a conically tapered surface for engaging said driver disk and said driver disk has a mating conically tapered surface for engaging said tapered surface of said hub.

13. The driver assembly as defined in claim 12 and further including a motor housing and a locking pin extending between said motor housing and said drive hub to selectively lock said hub against rotation to permit said driver disk to be removed for replacing a burnishing pad.

14. The driver assembly as defined in claim 13 and further including an interlock switch mounted to said housing and actuated by said locking pin for preventing actuation of the drive motor when said hub is locked against rotation.

15. The driver assembly as defined in claim 14 wherein said motor rotates said driver disk at a speed of from about 2000 rpm to about 2500 rpm.