Tamper tool and associated holder

Abstract

A tamper tool is provided for use in adjusting railroad ballast and constructed and arranged for use with a tamper tool holder attached to a railroad tamping machine. Included on the tool is a shaft with a first portion, a second portion, and a central portion disposed between the first and second portions, and a front surface, a rear surface, and two side surfaces. The first portion has through bores extending from the front surface to the rear surface, and the central portion has a first cross-section at an upper end, a second cross-section at a lower end. An area of the first cross-section is greater than an area of the second cross-section, and the shaft tapers between the first cross-section and the second cross-section. A paddle for tamping is attached at a free end of the second portion.

Claims

1. A holder configured for use with a tamper tool on a railroad tamping machine, comprising: a generally planar body having a first surface, a second surface, and a pair of side edges; a mounting point with a bore disposed on said first surface between said side edges; each said side edge having a lip projecting generally transversely relative to said first surface, each said lip forming a general U-shape with said mounting point, and defining a seat for receiving a shaft of the tamper tool, the shaft having a plurality of facets disposed at obtuse angles relative to each other, wherein at least one of said facets abuts said lip, and wherein at least one of said facets abuts said mounting point, and wherein said shaft abuts said first surface, such that said holder engages the shaft in a non-rotating relationship; and said first surface has a plurality of mounting holes projecting normally to said seat for receiving at least one fastener securing said holder to the tamper tool using said mounting holes, the mounting holes being constructed and arranged so that the at least one fastener projects normally to said seat so that each tool is secured to said holder in said seat only by the at least one fastener and engagement between the shaft and said seat.

2. The holder of claim 1, wherein the bore is tapered.

3. The holder of claim 1, wherein the bore is keyed.

4. The holder of claim 1, wherein the seat comers are radiused.

5. A combination of a tamper tool and a tamper tool holder for use in a railroad maintenance machine, comprising: a tamper tool, having a shaft with a first portion, a second portion, and a central portion disposed between said first and second portions, and a front surface, a rear surface, and two side surfaces; said first portion having through bores extending from the front surface to the rear surface; a tamper tool holder having a generally planar body having a first surface, a second surface, and a pair of side edges; said tamper tool holder having a mounting point with a bore disposed on said first surface between said side edges; each said side edge having a lip projecting generally transversely relative to said first surface, each said lip forming a general U-shape with said mounting point, and defining a seat for receiving said shaft of said tamper tool; said first surface has a plurality of mounting holes; said two side surfaces are faceted, said facets extending transverse to an axis of said shaft and each said facet disposed at an obtuse angle relative to the other, such that said facets are received by said seat of said holder; said seat is constructed and arranged for receiving said first portion of said tamper tool shaft, wherein at least one of said facets abuts said lip, and wherein at least one of said facets abuts said mounting point, and wherein said shaft abuts said first surface at the front surface of said shaft, such that said seat receives said first portion of said tamper tool shaft in a non-rotating relationship; said mounting holes of said first surface and said through bores of said first portion are in registry; and at least one fastener securing said holder to said tamper tool using the through bores and projecting normally to said seat so that each said tool is secured to said tool holder in said corresponding seat only by said at least one fastener and engagement between said shaft and said seat.

6. The combination of claim 5 wherein said tool holder includes a pair of said seats for accommodating a pair of said tools in spaced, parallel relationship to each other.

7. The combination of claim 5 wherein said at least one fastener projects transversely to a longitudinal axis of said shaft.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a rear elevation view of the present combination tamper tool and holder;

(2) FIG. 2 is a left side view of the combination of FIG. 1;

(3) FIG. 3 is a front elevation of the combination of FIG. 1;

(4) FIG. 4 is a top view of same;

(5) FIG. 5 is a top perspective front view of the combination of FIG. 1;

(6) FIG. 6 is a front elevation view of the present tamper tool;

(7) FIG. 7 is a right side view of FIG. 6;

(8) FIG. 8 is a front perspective view of the present tamper tool;

(9) FIG. 9 is a rear perspective view of the present tamper tool;

(10) FIG. 10 is a top view of the present tamper tool;

(11) FIG. 11 is a rear perspective view of the present tamper tool holder;

(12) FIG. 12 is a front perspective view of the holder of FIG. 11;

(13) FIG. 13 is a top view of the holder of FIG. 11;

(14) FIG. 14 is a rear elevation of the present tamper tool holder;

(15) FIG. 15 is a side elevation of the present tamper tool holder; and

(16) FIG. 16 is a bottom view of the present tamper tool holder.

DETAILED DESCRIPTION

(17) Referring now to FIGS. 1-5 and 11-16, a tamper assembly is generally designated 10 and includes a tamper tool holder 12, and at least one and preferably two tamper tools 14. In the preferred embodiment, the tamper tool 14 has a shaft 16 with a first portion 18, a second portion 20, and a central portion 22 located between the first and second portions. Also included on the shaft is a front surface 24, a rear surface 26, and two side surfaces 28. The first portion 18 has through bores 30 (FIG. 6) extending from the front surface 24 to the rear surface 26.

(18) Configured for retaining the tamper tool 14 so that axial rotation is prevented during tamping, the tamper tool holder 12 includes a generally planar body 32 having a first surface 34, a second surface 36 opposite the first surface, and a pair of side edges 38. A mounting point 40 with a bore 42 is disposed on the first surface 34 between the side edges 38. The bore 42 is constructed and arranged with a tapered configuration and a keyway 46 for receiving a tamper workhead drive shaft (not shown). Each side edge 38 has a lip 44 projecting generally transversely relative to the first surface 34, forming a U-shape with the mounting point 40 when viewed from above (FIG. 4). This U-shape defines a seat 48 for receiving the first portion 18 of the tamper tool shaft 16 in a non-rotating relationship. A pair of such seats 48 are provided in the holder 12, one on each side of the mounting point 40 so that two tools 14 are accommodated in spaced, parallel relationship to each other. The body 32 has a plurality of mounting holes 50. Upon assembly of the tamper assembly 10, the mounting holes 50 of the holder 12 and the through bores 30 of the shaft 16 are in registry. At least one and preferably two fasteners 52 secure each tamper tool 14 to the holder 12 using the through bores 30 and the mounting holes 50. Thus, the fasteners 52 extend in a direction transverse to a longitudinal axis of the tool 14. In the preferred embodiment, the fastener 52 is a nut and bolt, however other suitable fasteners used in the rail maintenance industry are contemplated, including pins with retaining clips and the like.

(19) Referring now to FIGS. 6-10, the shaft 16 of the tamper tool 14 also has the central portion 22, which is defined by a first cross-section 54 at an upper end 56 located below a lowermost through bore 30, a second cross-section 58 at a lower end 60, adjacent an upper edge 62 of a paddle 64. In the preferred embodiment, an area of the first cross-section 54 is greater than an area of the second cross section 58. In other words, the tamper tool shaft 16 tapers between the first cross-section 54 and the second cross section 58. This tapered configuration of the shaft 16 is visible from the front and rear surfaces 24, 26, as well as from the side surface 28 (FIGS. 6-9). The paddle 64 is integrally attached at a free end 66 of the second portion 20 of the tamper tool shaft 16.

(20) Referring now to FIG. 10, it is preferred that the tamper tool shaft 16 is hexagonal in transverse cross-section defined by side surfaces 28. The side surfaces 28 have facets 68 extending transverse to an axis of the shaft 16, and each facet is preferably disposed at an obtuse angle a relative to each other. The angle a is defined between the two facets 68. It is also contemplated that a may be at a right angle. It is also preferred that the shaft 16 has radiused corners 70 at junctions of the front 24 and rear 26 surfaces with respective side surfaces 28.

(21) While a particular embodiment of the present tamper tool and associated holder has been described herein, it will be appreciated by those skilled in the art that changes and modifications may be made thereto without departing from the invention in its broader aspects and as set forth in the following claims.