Jaw crusher retraction assembly

Patent metadata

Field	Value
Publication number	US-10549283-B2
Application number	US-201616471951-A
Country	US
Kind code	B2
Filing date	Dec 21, 2016
Priority date	Dec 21, 2016
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

A jaw crusher retraction assembly having a base, a first and second mount boss, a resiliently biased component and an actuating cylinder. The cylinder and resiliently biased component are mounted axially between respective regions of the base and the first and second bosses so as to minimize stress in the retraction assembly components and to provide a compact overall design.

First claim

The invention claimed is:

1. A jaw crusher retraction assembly comprising:
a base mountable to a frame part of a jaw crusher;
a first boss separated from the base and a second boss separated from the first boss, the second boss positioned furthest from a movable jaw of the jaw crusher relative to the first boss and the base;
at least one resiliently biased component mounted to extend between and arranged to resiliently of separate the first boss and the base;
a first and second retraction rod each having first and second ends, the first and second rods being mounted at the respective first ends to the second boss and extending past the first boss and the base for attachment at each of the respective second ends to the movable jaw; and
a cylinder having a barrel, a cylinder rod and a piston mounted to couple and act between the first boss and second boss, wherein the barrel is mounted to extend from the first boss in a direction towards the base and one end of the cylinder rod is positioned at the second boss such that the cylinder rod extends from the barrel and between the first boss and the second boss.

2. The assembly as claimed in claim 1 , wherein the at least one resiliently biased component is at least one spring.

3. The assembly as claimed in claim 2 , wherein the at least one resiliently biased component is a pair of springs each spring extending between the base and the first boss.

4. The assembly as claimed in claim 3 , wherein each of the springs of the pair of springs is a coil spring that extends respectively around a portion of the length of the respective first and second retraction rods.

5. The assembly as claimed in claim 4 , wherein the coil springs are positioned side-by-side and the barrel is mounted at the first boss to be positioned laterally between the coil springs.

6. The assembly as claimed in claim 4 , wherein an axial length of the coil springs is approximately equal to an axial length of the barrel.

7. The assembly as claimed in claim 1 , wherein each of the first and second boss is a plate.

8. The assembly as claimed in claim 7 , wherein the first boss includes first boss apertures and the first and second retraction rods pass respectively through the first boss apertures.

9. The assembly as claimed in claim 1 , wherein the base includes base apertures, the first and second retraction rods passing respectively through the base apertures.

10. The assembly as claimed in claim 1 , wherein the barrel includes a first and a second end, the cylinder being mounted at the first boss at the first end of the barrel.

11. The assembly as claimed in claim 1 , wherein substantially a full length of the barrel extends from one side of the first boss.

12. The assembly as claimed in claim 1 , wherein substantially a full length of the cylinder rod extends from one side of the second boss.

13. A jaw crusher comprising:
a first jaw and a second movable jaw; and
a jaw mounting assembly arranged to enable the second movable jaw to oscillate back and forth relative to the first jaw, wherein the jaw mounting assembly includes a jaw crusher retraction assembly comprising: a base mountable to a frame part of a jaw crusher; a first boss separated from the base and a second boss separated from the first boss, the second boss positioned furthest from the second movable jaw of the jaw crusher relative to the first boss and the base; at least one resiliently biased component mounted to extend between and arranged to resiliently separate the first boss and the base; a first and second retraction rod each having first and second ends, the first and second rods being mounted at respective first ends to the second boss and extending past the first boss and the base for attachment at each respective second ends to the movable jaw; and a cylinder having a barrel, a cylinder rod and a piston mounted to couple and act between the first boss and second boss, wherein the barrel is mounted to extend from the first boss in a direction towards the base and one end of the cylinder rod is positioned at the second boss such that the cylinder rod extends from the barrel and between the first boss and the second boss.

14. The crusher as claimed in claim 13 , wherein the jaw mounting assembly includes a back-frame-end, the base of the jaw crusher retraction assembly being mounted to an underside region of the back-frame-end.

Assignees

• Sandvik Intellectual Property

Inventors

• Sjobeck Roger
• Lindberg Marten

Classifications

• B02C1/025

  Jaw clearance or overload control · CPC title

• B02C1/04 Primary

  with single-acting jaws · CPC title

• B02C1/10

  Shape or construction of jaws · CPC title