Weldment bolting system including a rod bolt dowel

• US 6,385,869 B1
• Filed: 08/09/2000
• Issued: 05/14/2002
• Est. Priority Date: 08/09/2000
• Status: Expired due to Term

• Current Assignee: Joy Global Surface Mining Inc. (Komatsu Ltd.)
• Original Assignee: Harnischfeger Technologies Inc. (Komatsu Ltd.)
• Inventors: Cavaiani, William L., Steineman, Greg E.
• Primary Examiner(s): BATSON, VICTOR D
• Application Number:
  US09/634,154
• Time in Patent Office: 643 Days
• Field of Search: 373/98, 373/97, 373/94, 374/66, 374/00, 373/95, 403/408.1
• US Class Current: 37/397
• CPC Class Codes: E02F 9/0816 Welded frame structure
• CPC Class Codes: E02F 9/10 Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
• CPC Class Codes: Y10T 403/75 having a joining piece extending through aligned openings in plural members

Abstract

A bolting system for securing a first weldment including two spaced apart wall members, and a cross member connected to and extending between the wall members, to a second weldment including a wall member adjacent and in face to face contact with one of the first weldment wall members. The bolting system comprises a first plurality of least two openings in the one of second weldment wall member and the adjacent first weldment wall member, and a second opening in the other of the spaced apart first weldment wall members. The first plurality of openings are larger than the second opening. The bolting system further includes a rod bolt dowel in a tight fit in the first plurality of openings, the rod bolt dowel having an enlarged end which will not pass through the first plurality of openings, and having an opening through its center aligned with the second opening. The bolting system further includes a rod bolt loosely fitted in the rod bolt dowel opening and in the second opening, the rod bolt having a nut on the first end providing an enlargement that will not pass through either the rod bolt dowel opening or the second opening, and a nut releasably secured to the other end of the rod bolt and providing an enlargement that will not pass through either the rod bolt dowel opening or the second opening.

Claims

1. A bolting system for securing a first weldment including two spaced apart wall members, and a cross member connected to and extending between said wall members, to a second weldment including a wall member adjacent and in face to face contact with one of said first weldment wall members, said bolting system comprising

a first plurality of at least two openings in said second weldment wall member and said adjacent one of said first weldment wall members, and a second opening in the other of said spaced apart first weldment wall members, said first plurality of openings being larger than the second opening,

a rod bolt dowel in a tight fit in said first plurality of openings, said rod bolt dowel having an enlarged end which will not pass through said first plurality of openings, and having an opening through its center aligned with said second opening,

a rod bolt loosely fitted in said rod bolt dowel opening and in said second opening, the rod bolt having first end means on one end of the rod bolt providing an enlargement that will not pass through either said rod bolt dowel opening or said second opening, and

second end means releasably secured to the other end of the rod bolt and providing an enlargement that will not pass through either said rod bolt dowel opening or said second opening.

2. A bolting system in accordance with claim 1 wherein said one first weldment wall member has a top, and wherein said second weldment wall member has a top shear ledge that sits on top of the one first weldment wall member top.

3. A bolting system in accordance with claim 1 wherein said rod bolt dowel other end is tapered.

4. A power shovel including a crawler frame including two spaced apart wall members, and a cross member connected to and extending between said wall members, a car body including a wall member adjacent and in face to face contact with one of said crawler frame wall members, and a plurality of bolting systems securing the crawler frame to the car body, each bolting system including

a first plurality of at least two openings in said one crawler frame wall member and said adjacent car body wall member, and a second opening in the other of said spaced apart crawler frame wall members, said first plurality of openings being larger than the second opening,

a rod bolt dowel in a tight fit in said first plurality of openings, said rod bolt dowel having an enlarged end which will not pass through said first plurality of openings, and having an opening through its center aligned with said second opening,

a rod bolt loosely fitted in said rod bolt dowel opening and in said second opening, the rod bolt having first end means on one end of the rod bolt providing an enlargement that will not pass through either said rod bolt dowel opening or said second opening, and

second end means releasably secured to the other end of the rod bolt and providing an enlargement that will not pass through either said rod bolt dowel opening or said second opening.

5. A power shovel in accordance with claim 4 wherein said one wall member has a top, and wherein said other wall member has a top shear ledge that sits on top of the one wall member top.

6. A power shovel in accordance with claim 4 wherein said rod bolt dowel other end is tapered.