Ejector assembly having a pivotal upper member

• US 4,197,049 A
• Filed: 03/20/1978
• Issued: 04/08/1980
• Est. Priority Date: 03/20/1978
• Status: Expired due to Term

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Tractor Co (Caterpillar Incorporated)
• Inventors: Gee, James E., Stedman, Robert N.
• Primary Examiner(s): Kunin, Stephen G.
• Assistant Examiner(s): Siemens, Terrance L.
• Application Number:
  US05/890,722
• Time in Patent Office: 750 Days
• Field of Search: 214/82, 214/146 E, 214/510, 37/124, 37/129, 37/126 AB, 37/126 AE, 414/509, 414/511, 414/513, 414/516, 414/725, 414/726, 414/492, 414/493
• US Class Current: 414/493
• CPC Class Codes: E02F 3/6481 with scraper bowls with an ejector having translational movement for dumping the soil E02F3/649 takes precedence
• CPC Class Codes: E02F 3/656 Ejector or dumping mechanisms for buckets mounted on a dipper-arm or bucket arms E02F3/407

Abstract

A self loading scraper has upper and lower members of an ejector pivotally interconnected at a pivot. The upper member is automatically pivoted about the pivot rearwardly relative to the lower member as the ejector is moved forwardly for ejecting the load from the bowl.

Claims

1. An ejector mechanism for a self loading scraper having an elongate bowl, said bowl having forward and rearward ends, a pair of spaced sidewalls, and a floor interconnecting the bottom edge portion of the sidewalls, comprising:

an ejector assembly having upper and lower members and a hinge pin hingedly connecting the upper member to the lower member, said ejector assembly being slidably positioned within the bowl between the sidewalls and both the upper and lower members being translatable relative to the sidewalls between a first position adjacent the rearward end and a second position adjacent the forward end; and

means for automatically pivoting the upper member about the hinge pin rearwardly relative to the lower member in response to the upper and lower members of the ejector assembly being translated from the first position to the second position.

2. The ejector mechanism of claim 1 wherein said means is connected to at least one sidewall forwardly of the ejector assembly at the first position of the ejector assembly.

3. The ejector mechanism of claim 2 wherein said means includes an elongate link having first and second end portions, a first pivot pin pivotally connecting the first end portion of the link to one sidewall of the bowl, and a second pivot pin pivotally connecting the second end portion of the link to the upper member.

4. The ejector mechanism of claim 3 wherein said second pivot pin is spaced a first distance from the hinge pin and a second distance from the first pivot pin, said first and second distances being substantially equal, said hinge pin and said first pivot pin being positioned in a plane substantially parallel to said floor.

5. The ejector mechanism of claim 2 wherein said means includes a roller rotatably connected to the sidewall in the pathway of the upper member for engagement therewith prior to the ejector assembly reaching said second position.

6. The ejector mechanism of claim 5 including first stop means for limiting the rearward pivoting of the upper member relative to said lower member.

7. The ejector mechanism of claim 5 including second means for automatically pivoting the upper member about said hinge pin forwardly relative to the lower member in response to the ejector assembly being moved from the second position to the first position.

8. The ejector mechanism of claim 7 wherein said second means includes a second roller rotatably connected to the upper edge portion of the upper member and a guide cam connected to the scraper bowl rearwardly of the ejector assembly and positioned in the pathway of the second roller.

9. The ejector mechanism of claim 8 including second stop means for limiting the forward pivoting of the upper member relative to said lower member.

10. An ejector mechanism for a self loading scraper having an elongate bowl, said bowl having forward and rearward ends, a pair of spaced sidewalls, and a floor interconnecting the bottom edge portion of the sidewalls, comprising:

an ejector assembly having upper and lower members and a hinge pin hingedly connecting the upper member to the lower member, said ejector assembly being slidably positioned within the bowl between the sidewalls and being movable between a first position adjacent the rearward end and a second position adjacent the forward end;

means for automatically pivoting the upper member about the hinge pin rearwardly relative to the lower member in response to the ejector assembly being moved from the first position to the second position, said means including an elongate link having first and second end portions, a first pivot pin pivotally connecting the first end portion of the link to one sidewall of the bowl forwardly of the ejector assembly at the first position of the ejector assembly, and a second pivot pin pivotally connecting the second end portion of the link to the upper member.

11. The ejector mechanism of claim 10 wherein said second pivot pin is spaced a first distance from the hinge pin and a second distance from the first pivot pin, said first and second distances being substantially equal, said hinge pin and said first pivot pin being positioned in a plane substantially parallel to said floor.