Frame front end of jaw crusher, jaw crusher and crushing plant

1. A front end of a frame of a jaw crusher having a throat which front end comprises a curved front wall having a curved shell structure which is curved in horizontal cross section for receiving a crushing force and an inner rib structure formed and joined to the curved front wall, wherein the inner rib structure includes a series of inner ribs each joined to an inner surface of the curved front wall, where the inner rib structure is adapted to receive a wear plate of the jaw crusher and where the inner ribs and the inner surface face the throat.

2. The front end of a frame of a jaw crusher according to claim 1 , wherein the front end comprises side wall parts of the frame which side wall parts are connected to the curved front wall and the side wall parts and the front wall are detachably joinable to a rear part of the frame of the jaw crusher.

3. The front end of a frame of a jaw crusher according to claim 2 , wherein the front end comprises joining flanges in the side wall parts via which joining flanges of the front end are detachably joinable to a rear part of the frame.

4. The front end of a frame of a jaw crusher according to claim 2 , wherein the front end comprises at least one first flange in the side wall parts providing a flange-screw joint for attaching the front end to rear part of the frame.

5. The front end of a frame of a jaw crusher according to claim 1 , wherein the front end further comprises an outer rib structure joined to an outer surface of the curved front wall.

6. The front end of a frame of a jaw crusher according to claim 1 , wherein the inner rib structure comprises horizontal ribs and/or vertical ribs.

7. The front end of a frame of a jaw crusher according to claim 1 , wherein the inner rib structure of the front wall comprises horizontal ribs and vertical ribs which are joined to the inner surface, and the vertical ribs are connected to the horizontal ribs.

8. The front end of a frame of a jaw crusher according to claim 1 , wherein the front end is configured as a unitary piece.

9. The front end of a frame of a jaw crusher according to claim 2 , wherein the front end comprises in the side wall parts at least one fork or at least one tongue which comprise pin holes for a pin providing a fork-pin joint for attaching the front end to a rear part of the frame.

10. A jaw crusher haying a throat for crushing mineral material comprising:

a frame; and

a front end of the frame comprising a curved front wall having a curved shell structure which is curved in horizontal cross section for receiving a crushing force and an inner rib structure formed and joined to the curved front wall, wherein the inner rib structure includes a series of inner ribs each joined to an inner surface of the curved front wall, where the inner rib structure is adapted to receive a wear plate of the jaw crusher and where the inner ribs and the inner surface face the throat.

11. A crushing plant having a throat comprising:

a frame; and

a front end of the frame comprising a curved front wall having a curved shell structure which is curved in horizontal cross section for receiving a crushing force and an inner rib structure formed and joined to the curved front wall, wherein the inner rib structure includes a series of inner ribs each joined to an inner surface of the curved front wall, where the inner rib structure is adapted to receive a wear plate of the aw crusher and where the inner ribs and the inner surface face the throat.