Screen lift mechanism for variable slope vibrating screens

• US 9,010,542 B2
• Filed: 08/08/2012
• Issued: 04/21/2015
• Est. Priority Date: 08/10/2011
• Status: Active Grant

• Current Assignee: Terex Usa, LLC (Terex Corporation)
• Original Assignee: Terex Usa, LLC (Terex Corporation)
• Inventors: Schirm, Payton, Young, Gregory
• Primary Examiner(s): Gonzalez, Luis A
• Application Number:
  US13/570,009
• Publication Number:
  US 20130037454A1
• Time in Patent Office: 986 Days
• Field of Search: 209/413, 209/420, 209/421, 209/404, 209/405, 209/412, 209/260
• US Class Current: 209/413
• CPC Class Codes: B02C 23/10 with separator arranged in discharge path of crushing or disintegrating zone
• CPC Class Codes: B07B 1/005 Transportable screening plants
• CPC Class Codes: B07B 1/28 Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
• CPC Class Codes: B07B 1/286 with excentric shafts
• CPC Class Codes: B07B 1/46 Constructional details of screens in general; Cleaning or heating of screens
• CPC Class Codes: B07B 13/16 Feed or discharge arrangements
• CPC Class Codes: B07B 2201/04 Multiple deck screening devices comprising one or more superimposed screens
• CPC Class Codes: Y10S 209/922 Miscellaneous feed conveyors
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A compact mobile variable angle vibrating screen with a suspension and dampening system configured to rapidly accommodate variable angles and exhibit acceptable vibration levels; especially during power up and power down surge vibration at the variable angles. The system comprises a group of bi-directional dual pivot leg vibration damper mechanisms, including nesting tubes, one with holes for receiving pins and the other with a semi-circular cutout at the bottom edge.

Claims

1. A variable slope vibrating screen for material processing comprising:

a frame;

a support structure which is configured to be adjusted to variable angles with respect to said frame;

a variable slope vibrating screen configured for sorting aggregate by size, said variable slope vibrating screen being supported at variable slopes by said support structure;

a discharge output configured for creating a pile of sorted aggregate; and

a hydraulic system configured to apply a biasing damping force which is directed for biasing a portion of said support structure, so as to reduce relative movement between said frame and said support structure;

further comprising an accumulator for maintaining said biasing damping force over a period of time, despite pressure reducing leaks in said hydraulic system.

2. A variable slope vibrating screen for material processing comprising:

a frame;

a support structure which is configured to be adjusted to variable angles with respect to said frame;

a variable slope vibrating screen configured for sorting aggregate by size, said variable slope vibrating screen being supported at variable slopes by said support structure;

a discharge output configured for creating a pile of sorted aggregate; and

a hydraulic system configured to apply a biasing damping force which is directed for biasing a portion of said support structure, so as to reduce relative movement between said frame and said support structure

wherein said support structure comprises;

an outer adjustable support leg;

an inner adjustable support leg; and

a locking pin;

wherein said outer adjustable support leg comprises, at a bottom terminal end a half circle cut out for partially surrounding said locking pin when said locking pin is disposed in a predetermined hole in said inner adjustable support leg;

further comprising an accumulator for maintaining said biasing damping force over a period of time despite pressure reducing leaks in said hydraulic system.

3. A variable slope vibrating screen for material processing comprising:

a frame;

a support structure which is configured to be adjusted to variable angles with respect to said frame;

a vibrating screen configured for sorting aggregate by size, said vibrating screen being supported at variable slopes by said support structure;

an output configured for creating a pile of sorted aggregate; and

a system configured to apply a biasing force which is directed for biasing a portion of said support structure, so as to reduce relative movement between said frame and said support structure;

wherein said support structure comprises;

an outer adjustable support leg;

an inner adjustable support leg; and

a locking pin; and

wherein said outer adjustable support leg comprises, at a bottom terminal end, a half circle cut out for partially surrounding said locking pin when said locking pin is disposed in a predetermined hole in said inner adjustable support leg.

4. The screen of claim 3 further comprising an accumulator for maintaining said biasing force over a period of time despite pressure reducing leaks in said system.

5. A variable slope vibrating screen for material processing comprising:

a frame;

a support structure which is configured to be adjusted to variable angles with respect to said frame;

a vibrating screen configured for sorting aggregate by size, said vibrating screen being supported at variable slopes by said support structure;

an output configured for creating a pile of sorted aggregate; and

a system configured to apply a biasing force which is directed for biasing a portion of said support structure, so as to reduce relative movement between said frame and said support structure;

further comprising an accumulator for maintaining said biasing force over a period of time, despite pressure reducing leaks in said system.

6. A variable slope vibrating screen for material processing comprising:

a frame;

a support structure which is configured to be adjusted to variable angles with respect to said frame;

a variable slope vibrating screen configured for sorting aggregate by size, said variable slope vibrating screen being supported at variable slopes by said support structure;

a discharge output configured for creating a pile of sorted aggregate;

a hydraulic system configured to apply a biasing damping force which is directed for biasing a portion of said support structure, so as to reduce relative movement between said frame and said support structure;

wherein the biasing damping force is at least partially directed downwardly;

wherein said support structure comprises;

an outer adjustable support leg;

an inner adjustable support leg; and

a locking pin;

wherein said hydraulic system comprises a cylinder which is capable of both forcibly extending and retracting;

wherein said outer adjustable support leg comprises, at a bottom terminal end, a half circle cut out for partially surrounding said locking pin when said locking pin is disposed in a predetermined hole in said inner adjustable support leg; and

further comprising;

an accumulator for maintaining said biasing damping force over a period of time, despite pressure reducing leaks in said hydraulic system.