End brush

• US 4,408,367 A
• Filed: 04/20/1981
• Issued: 10/11/1983
• Est. Priority Date: 04/20/1981
• Status: Expired due to Fees

• Current Assignee: Milwaukee Brush Manufacturing Company, Inc.
• Original Assignee: Advance Brushes Incorporated
• Inventors: Pusterhofer, Ronald J.
• Primary Examiner(s): Feldman, Peter
• Application Number:
  US06/255,367
• Time in Patent Office: 904 Days
• Field of Search: 15/180, 15/198, 15/200, 15/179, 29/520, 29/523, 29/509, 29/522, 300/21
• US Class Current: 15/180
• CPC Class Codes: A46B 3/10 into rings or the like
• CPC Class Codes: Y10T 29/49915 Overedge assembling of seated part
• CPC Class Codes: Y10T 29/49938 Radially expanding part in cavity, aperture, or hollow body

Abstract

An end brush construction in which a cup-shaped bristle holder is permanently attached to an arbor by deforming the arbor in place on the holder. As disclosed, the arbor is caused to freely upset radially into a surrounding zone of the cup holder. Where the cup holder is formed from sheet material, it can be provided with an axially extending flange to increase the support area which is engaged by the expanded arbor.

Claims

1. A rotating end brush comprising a cup-shaped holder having an open face at one end and a generally circular, radially extending end wall at the opposite end, a generally cylindrical sidewall integral with and extending axially forwardly from the end wall, the sidewall terminating at an annular edge bounding said open end face, a multitude of bristles anchored in the cup holder and extending forwardly of the cup holder open end face, said cup holder end wall having a central aperture extending axially rearwardly from an area adjacent said sidewall a distance substantially greater than the thickness of said sidewall, a unitary arbor in the form of a generally circular body of stepped diameter, said arbor including successive head, hub, and stem sections, said head section being disposed in the cup holder and being larger in diameter than said aperture, said hub section being disposed in said aperture, and said stem section extending rearwardly away from said hub section and said end wall, said arbor being permanently assembled with said cup holder with an upset formed in said hub section by plastic deformation of the hub section of said arbor formed after positioning of said arbor in said aperture, said upset being limited to said hub section and having a final diametral dimension substantially larger than at least a portion of said aperture forward of said upset whereby said arbor is permanently locked on said cup holder.

2. A rotary end brush assembly as set forth in claim 1, wherein said upset is the result of free radial expansion of the stock of said arbor into said aperture whereby said arbor is locked onto said cup holder primarily by radial interference with said aperture.

3. A rotary end brush assembly as set forth in claim 2, wherein said aperture is formed at least in part by an axially extending flange integral with the remainder of the body of the cup holder.

4. A rotary end brush assembly as set forth in claim 3, wherein said arbor is initially provided as a cold forged part.

5. A rotary end brush assembly as set forth in claim 3, wherein said arbor is formed of a metal having a strength substantially greater than the material forming said cup holder.

7. A rotary end brush assembly as set forth in claim 3, wherein said bristles are folded over an annulus disposed in said holder, said bristles and annulus being retained in said holder by an inturned flange formed by said annular edge.

6. A rotary end brush assembly comprising a cup-shaped holder having an open face at one end and a generally circular, radially extending end wall at the opposite end, the end wall having a central aperture of an initial diameter, a generally cylindrical sidewall integral with and extending axially forwardly from the end wall, the sidewall terminating at an annular edge bounding said open end face, a multitude of bristles anchored in the cup holder and extending forwardly of the cup holder open end face, said cup holder end wall having a central aperture extending axially rearwardly from an area adjacent said sidewall a distance greater than the thickness of said sidewall, a unitary arbor in the form of a generally circular body of stepped diameter, said arbor including successive head, hub, and stem sections, said head section being disposed in the cup holder and being larger in diameter than said aperture, said hub section being disposed in said aperture, and said stem section extending rearwardly away from said hub section and said end wall, said arbor being permanently assembled with said cup holder with an upset formed in said hub section by plastic deformation of the hub section of said arbor formed after positioning of said arbor in said aperture, said upset being limited to said hub section and having a final diametral dimension substantially larger than at least a portion of said aperture forward of said upset whereby said arbor is permanently locked on said cup holder and said upset being the result of free radial expansion of the stock of said arbor into said aperture whereby said arbor is locked onto said cup holder primarily by radial interference with said aperture, said aperture being formed at least in part by an axially extending flange integral with the remainder of the body of the cup holder, said bristles being carried on a disc-like body, said disc-like body having a central aperture, said arbor including a hub portion passing through said disc-like body aperture, said arbor permanently locking said disc-like body to said holder.

8. A rotary end brush assembly comprising a stamped sheet metal cup holder, said cup holder having an open face at one end and a generally radially extending end wall at its opposite end, said cup holder including a cylindrical sidewall integral with said end wall and extending from said end wall axially forwardly to said open end, said end wall having a central aperture formed at least in part by an axially extending flange integrally formed on the end wall, bristle material anchored in said cup holder, a unitary arbor extending through said aperture and being permanently affixed to the cup holder, said arbor being a generally circular body of stepped diameter, a head section of said arbor forming its major diameter and being larger in diameter than said aperture, said head section being disposed in said cup holder adjacent said end wall, a hub section of said arbor seated in said aperture, and a cylindrical stem section of said arbor extending rearwardly of said hub section, said arbor being affixed to said cup holder by a high degree of radial interference between said hub section and said aperture as a result of free radial upsetting of said hub section in said aperture while said head and stem sections are substantially devoid of distortion.

9. A rotary end brush assembly comprising a stamped sheet metal cup holder, said cup holder having an open face at one end and a generally radially extending end wall at its opposite end, said cup holder including a generally cylindrical sidewall integral with said end wall and extending from said end wall axially forwardly to said open end, said end wall having a central aperture extending axially rearwardly from an area adjacent said sidewall a distance substantially greater than the thickness of said sidewall, bristle material anchored in said cup holder, a unitary arbor extending through said aperture and being permanently affixed to the cup holder, said arbor being a generally circular body of stepped diameter, said arbor including a head section, said head section being generally disposed on one side of said end wall and having a diameter greater than that of said aperture, a hub section of said arbor seated in said aperture, and a cylindrical stem section of said arbor extending rearwardly of said end wall, said arbor being affixed to said cup holder by a high degree of radial interference between said hub section and said aperture as a result of free radial upsetting of said hub section in said aperture, said hub section having a conical configuration opposing said head section such that it increases it diameter in a direction away from said head section and is thereby permanently locked to said cup holder as a result of said radial upsetting, said cylindrical stem section having a diameter smaller than the major diameter of said hub section and an axial length greater than the combined length of said head and hub sections.

10. A method of manufacturing an end brush comprising the steps of providing a cup-shaped metal holder having a central aperture in the end wall thereof with the aperture having an axial length substantially greater than the thickness of the sidewall, providing a metal arbor having head, hub, and stem sections, with the head section having a diameter larger than the aperture, inserting the arbor hub section into the cup holder aperture so that the stem section extends rearwardly away from said cup holder, axially compressing the head and hub sections with opposed tool elements in a manner wherein said hub section is caused to upset by plastic deformation into a diameter greater than at least a portion of said aperture to thereby permanently lock said arbor onto said cup holder, and positioning and securing bristle material in said cup holder.

11. A method as set forth in claim 10, wherein said cup holder is provided with an axially extending flange integrally formed therewith and forming at least a part of said aperture, said upsetting of said hub section resulting in a conical configuration of said hub section opposed to and increasing in diameter away from said head section.

12. A method as set forth in claim 11, wherein said arbor is selected from a metal material substantially stronger than the metal material forming said cup holder.

13. A method as set forth in claim 11, wherein said arbor is provided with said hub section intermediate said head section and said stem section, said arbor being assembled to said cup holder by positioning said arbor into said aperture stem first from the open face of said cup holder.

14. A method of manufacturing an end brush comprising the steps of providing a cup-shaped sheet metal holder having a central aperture in the end wall thereof with the aperture having an axial length substantially greater than the thickness of the sidewall, providing a metal arbor having head, hub, and stem sections, with the head section having a diameter larger than the aperture, inserting the arbor hub section into the cup holder aperture so that the stem section extends rearwardly away from said cup holder, axially compressing the head and hub sections with opposed tool elements in a manner wherein said hub section is caused to upset by plastic deformation into a diameter greater than at least a portion of said aperture to thereby permanently lock said arbor onto said cup holder, and positioning and securing bristle material in said cup holder, said cup holder being provided with an axially extending flange integrally formed therewith and forming at least a part of said aperture, said upsetting of said hub section resulting in a conical configuration of said hub section opposed to and increasing in diameter away from said head section, said arbor being provided with said hub section intermediate said head section and said stem section, said arbor being assembled to said cup holder by positioning said arbor into said aperture stem first from the open face of said cup holder, said bristle material being assembled on a carrier disc having a central aperture, said carrier disc being disposed in said cup holder with its aperture aligned with the cup holder aperture, said arbor hub section extending through both of said apertures and being arranged such that said hub section when upset locks said carrier disc in said cup holder.