Jaw crusher, crushing plant and crushing method

Patent metadata

Field	Value
Publication number	US-10543487-B2
Application number	US-201315036146-A
Country	US
Kind code	B2
Filing date	Nov 14, 2013
Priority date	Nov 14, 2013
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

A jaw crusher including a fixed jaw and a movable jaw for forming a crushing chamber therebetween which is open at the top, the fixed jaw including a first wear part mounted thereto and the movable jaw including a pitman and a second wear part mounted thereto. The crushing chamber includes an upper section, a middle section, and a lower section having equal heights (h). The pitman is bearing-mounted to an eccentric shaft and to at least one slide member. The at least one slide member is configured to slide in a direction substantially perpendicular to the vertical diagonal of the crushing chamber. A method for crushing mineral material in a jaw crusher or a crushing plant is also disclosed.

First claim

The invention claimed is:

1. A jaw crusher comprising:
a fixed jaw and a movable jaw for forming a crushing chamber therebetween which is open at the top, the fixed jaw comprising a first wear part mounted thereto and the movable jaw comprising a pitman and a second wear part mounted thereto;
wherein the crushing chamber comprises an upper section, a middle section, and a lower section having equal heights;
wherein the pitman is coupled to an eccentric shaft and to at least one slide member such that a horizontal line passing through a center of the eccentric shaft passes through the middle section of the crushing chamber and through the at one least one slide member; and
wherein the at least one slide member restricts the vertical movement of the pitman and the slide member is configured to slide along a linear movement path that is perpendicular to a vertical bisecting line of the crushing chamber in an attachment region between the at least one slide member and the pitman.

2. The jaw crusher of claim 1 , wherein the horizontal line passing through the center of the eccentric shaft passes through the centerline of the crushing chamber thus dividing the crushing chamber into two parts of equal height.

3. The jaw crusher of claim 1 , wherein the slide member is configured to receive vertically both compression and tension forces.

4. The jaw crusher of claim 1 , wherein the slide member is arranged to move relative to the pitman or relative to side plates of the jaw crusher; and a fixing member attached to said slide member is correspondingly attached to the side plates or to the pitman.

5. The jaw crusher of claim 1 , wherein the vertical bisecting line of the crushing chamber has the direction of the gravitation.

6. The jaw crusher of claim 1 , wherein a first slide member of the at least one slide member is arranged between the vertical bisecting line of the crushing chamber and the eccentric shaft.

7. The jaw crusher of claim 6 , wherein the jaw crusher further comprises a second slide member which is arranged behind the eccentric shaft when viewed from the direction of the first slide member.

8. The jaw crusher of claim 6 , wherein the jaw crusher comprises a crank connected between an eccentric portion of the eccentric shaft and a fixing member of the first or second slide member.

9. The jaw crusher of claim 6 , wherein a first distance between the eccentric shaft and the first slide member is arranged larger than a second distance between the vertical bisecting line of the crushing chamber and the first slide member.

10. The jaw crusher of claim 7 , wherein the jaw crusher comprises a third slide member which is arranged between the eccentric shaft and the pitman.

11. The jaw crusher of claim 10 , wherein the third slide member is configured to transfer the eccentric movement of the eccentric shaft to the horizontal movement of the pitman.

12. The jaw crusher of claim 1 , wherein a rotatable eccentric element is coupled between the pitman and the eccentric portion of the eccentric shaft which is located at a front end of the pitman close to the crushing chamber, and wherein the eccentricity and rotational speed of the eccentric element and the eccentric shaft are arranged equal so that a linear movement of the pitman is achieved.

13. The jaw crusher of claim 12 , wherein the slide member is arranged behind the eccentric shaft when viewed from the direction of the crushing chamber.

14. The jaw crusher of claim 1 , wherein the jaw crusher comprises a safety device with lower and upper hydraulic cylinders coupled between the at least one slide member and the pitman, wherein the lower and upper cylinders are configured with a specific safety pressure limit arranged to support vertically the at least one slide member.

15. A crushing plant, wherein the crushing plant comprises the jaw crusher of claim 1 .

16. A method for mineral material crushing in a jaw crusher or a crushing plant, the jaw crusher or the crushing plant comprising a fixed jaw and a movable jaw for forming a crushing chamber therebetween which is open at the top, the fixed jaw comprising a first wear part mounted thereto and the movable jaw comprising a pitman and a second wear part mounted thereto; wherein the crushing chamber comprises an upper section, a middle section, and a lower section having equal heights; wherein the pitman is coupled to an eccentric shaft and to at least one slide member, wherein a horizontal line passing through a center of the eccentric shaft passes through the middle section of the crushing chamber and through the at least one slide member; further comprising directing a linear crushing stroke to the material to be crushed in the crushing chamber by sliding the at least one slide member of the movement mechanism of the jaw crusher in a direction perpendicular to a vertical bisecting line of the crushing chamber, wherein the at least one slide member restricts the vertical movement of the pitman to sliding along a linear path in an attachment region between the at least one slide member and the pitman.

17. The method of claim 16 , wherein the slide member is configured to vertically receive both compression and tension loads.

18. The method of claim 16 , further comprising moving the slide member relative to the pitman or relative to side plates of the jaw crusher.

19. The method of claim 16 , further comprising coupling the eccentric movement of the eccentric shaft by a crank to the slide member.

Assignees

• Metso Minerals Inc

Inventors

• Viilo Keijo

Classifications

• B02C1/04 Primary

  with single-acting jaws · CPC title

• B02C1/02

  Jaw crushers or pulverisers · CPC title

• B02C1/06

  with double-acting jaws · CPC title

• B02C21/02

  Transportable disintegrating plant · CPC title

• B02C21/00

  Disintegrating plant with or without drying of the material (for grain B02C9/04) · CPC title