Self-propelled remote-controlled stone crusher designed to operate inside trenches

• US 5,823,707 A
• Filed: 11/15/1996
• Issued: 10/20/1998
• Est. Priority Date: 01/29/1996
• Status: Expired due to Term

• Current Assignee: Offcine Meccaniche Laurini Lodovico & CSNC
• Original Assignee: Offcine Meccaniche Laurini Lodovico & CSNC
• Inventors: Lodovico, Laurini
• Primary Examiner(s): Bagnell, David J.
• Assistant Examiner(s): Hartmann, Gary S.
• Application Number:
  US08/751,112
• Time in Patent Office: 704 Days
• Field of Search: 241/33, 241/101.742, 241/186.5, 404/90, 404/91, 299/30, 299/39.2, 299/39.6, 299/39.9
• US Class Current: 404/91
• CPC Class Codes: E02F 3/20 with tools that only loosen the material , i.e. mill-type wheels

Abstract

A self-propelled stone crusher includes systems designed to operate the various machine functions by remote control (30), for operating on open ground or inside trenches, collecting and crushing rocks and stones which are then unloaded and levelled behind the machine. The chassis (3) of the machine is hinged to a shaft (11) integral with a crawler support structure (5) so that the machine can be tilted to a greater or lesser extent, depending on the lie of the land, and the crusher has a hammer mill (10) at the front, the perimeter of which is formed by a grid consisting of a number of bars (25), the distance between which varies, depending on the required particle size of the crushed material.

Claims

1. A self-propelled stone crusher comprising:

a machine chassis (3);

an engine unit (2) fixed to and moveable with said machine chassis;

a stone crushing mill (10) fixed to and moveable with said chassis, said stone crushing mill being connected to said engine unit for crushing stones introduced into said mill;

a crawler support structure (5);

a chassis support shaft (11) connected to and supported by said crawler support structure;

a crawler (4) moveably mounted to said crawler support structure and operatively connected to said engine unit for driving said crawler support structure with said horizontal shaft in a forward direction;

said chassis (3) being pivotally mounted to said chassis support shaft for moving in the forward direction with said crawler support structure; and

inclination control means (12) connected between said crawler support structure and said chassis for controlling an inclination of said chassis with respect to said crawler support structure by pivoting said chassis on said chassis support shaft and thereby controlling an inclination of said crushing mill with respect to said crawler support structure and with respect to said crawler while said crawler moves said chassis in the forward direction.

2. A stone crusher according to claim 1 including a remote control for remotely operating said engine unit.

3. A stone crusher according to claim 2 wherein said stone crushing mill comprises a cage having an inlet opening (H) for receiving stones as the chassis moves in the forward direction, the cage with outlet openings for discharging stones that are crushed and a plurality of hammers (23) rotatable in said cage for crushing stones and moving crushed stones through outlet openings in said cage.

4. A stone crusher according to claim 3 wherein said chassis includes forward side walls (20) on opposite sides of said inlet opening in said cage for guiding stones into said stone crushing mill when said chassis moves in the forward direction.

5. A stone crusher according to claim 3 wherein said chassis includes a lower inclined plate (26) which is inclined with respect to a bottom of said chassis and which is behind said stone crushing mill with respect to the forward direction for scooping up crushed stones discharge through said outlet openings in said cage from said stone crushing mill as said chassis moves in the forward direction.

6. A stone crusher according to claim 5 wherein said inclined plate has a forward end with respect to the forward direction which is lower than a rear end of said inclined plate when said chassis is horizontal, for raising crushed stones upwardly alone said inclined plate and allowing them to fall from the rear end of the inclined plate as the chassis moves in the forward direction.

7. A stone crusher according to claim 6 including a conveyer (27) connected to said chassis rearwardly of said inclined plate for conveying crushed stones transversely to the forward direction as crushed stones are received from the rear end of said inclined plate as said chassis moves in the forward direction.

8. A stone crusher according to claim 7 wherein said conveyer comprises a screw conveyer.

9. A stone crusher according to claim 1 wherein said stone crushing mill comprises a milling shaft rotatable to crushed stones introduced into said stone crushing mill with movement of the chassis in the forward direction, said chassis comprising a pair of front side walls (18) each having a slit (19) for removably receiving said milling shaft without requiring axial movement of said milling shaft.

10. A stone crusher according to claim 9 wherein said chassis includes a pair of removable supports (17) removably connected to said front side walls, said chassis including a pair of rear side walls (13) positioned rearwardly of said front side walls with respect to the forward direction, said support (17) being welded to said rear side walls (13), said rear side walls being pivotally connected to said chassis support shaft (11).