Self-Propelled Crusher and Management System for Self-Propelled Crusher

• US 20090114750A1
• Filed: 05/09/2007
• Published: 05/07/2009
• Est. Priority Date: 05/10/2006
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Maeda, Yukinori, Yamazaki, Kazuyuki, Nishida, Yasutaka, Yoshida, Hiroshi, Togashi, Ryoichi
• Granted Patent: US 7,942,355 B2
• Time in Patent Office: Days
• US Class Current: 241/34
• CPC Class Codes: B02C 1/025 Jaw clearance or overload control
• CPC Class Codes: B02C 21/026 self-propelled
• CPC Class Codes: B02C 23/04 Safety devices in general F16P ; for rotary mills B02C13/31

Abstract

A self-traveling crushing machine includes: a traveling device; a crushing device that is provided on the traveling device and crushes a to-be-crushed object supplied; an overload escaping section that escapes an overload of the crushing device; and a controller that controls the crushing device. In the self-traveling crushing machine, the crushing device is a jaw crusher in which the to-be-crushed object is supplied to a V-shaped space formed by a fixed jaw and a movable jaw and the movable jaw swings relative to the fixed jaw to crush the to-be-crushed object, and the controller includes: an escape-operation determining section that determines whether or not the overload escaping section has operated; and an information output section that sends the escape operation information to an outside when the escape-operation determining section determines that the escape operation has been conducted.

Claims

1. A self-traveling crushing machine comprising:

a traveling device;

a crushing device that is provided on the traveling device and crushes a to-be-crushed object supplied;

an overload escaping section that escapes an overload of the crushing device; and

a controller that controls the crushing device, wherein

the crushing device is a jaw crusher in which the to-be-crushed object is supplied to a V-shaped space formed by a fixed jaw and a movable jaw and the movable jaw swings relative to the fixed jaw to crush the to-be-crushed object, and

the controller comprises;

an escape-operation determining section that determines whether or not the overload escaping section has operated; and

an information output section that sends escape operation information to an outside when the escape-operation determining section determines that escape operation has been conducted.

2. The self-traveling crushing machine according to claim 1, wherein

the overload escaping section is a hydraulic cylinder with a close fit mechanism having a first end connected to a crushing device body on which the fixed jaw is fixed and a second end connected to the movable jaw, the hydraulic cylinder with the close fit mechanism having a stroke that changes when the movable jaw is overloaded, and

the escape-operation determining section conducts determination of the escape operation based on a detection signal from a stroke sensor that detects a change of the stroke of the hydraulic cylinder with the close fit mechanism.

3. The self-traveling crushing machine according to claim 1, wherein

the overload escaping section is a hydraulic cylinder with a close fit mechanism having a first end connected to a crushing device body on which the fixed Jaw is fixed and a second end connected to the movable jaw, the hydraulic cylinder with the close fit mechanism having a stroke that changes when the movable jaw is overloaded,

the hydraulic cylinder with the close fit mechanism is connected to the crushing device body via a link member, and

the escape-operation determining section conducts determination of the escape operation based on a detection signal from an angle sensor that detects an angle change of the link member caused by a change of the stroke of the hydraulic cylinder with the close fit mechanism.

4. The self-traveling crushing machine according to claim 1, wherein

the overload escaping section is a toggle plate, the toggle plate having a first end connected to a crushing device body on which the fixed jaw is fixed and a second end connected to the movable jaw, the toggle plate buckling when the movable jaw is overloaded, and

the escape-operation determining section conducts determination of the escape operation based on a detection signal from a stress sensor that detects a change of a stress generated in the toggle plate.

5. The self-traveling crushing machine according to claim 4, wherein

the escape-operation determining section determines presence of the escape operation when the stress sensor detects a detection stress greater than a threshold stress that is set in advance to be smaller than a rupture stress of the toggle plate.

6. The self-traveling crushing machine according to claim 1, wherein

the overload escaping section is a toggle plate, the toggle plate having a first end connected to a crushing device body on which the fixed jaw is fixed and a second end connected to the movable jaw, the toggle plate buckling when the movable jaw is overloaded,

the toggle plate is connected to a reaction-force supporting mechanism, the reaction-force supporting mechanism being provided to the crushing device body and supporting a force applied to the movable jaw, and

the escape-operation determining section conducts determination of the escape operation based on a detection signal from a stress sensor that detects change of a stress applied to the reaction-force supporting mechanism.

7. An administrative system of a self-traveling crushing machine, the administrative system comprising:

at least one self-traveling crushing machine that comprises a traveling device, a crushing device that is provided on the traveling device and crushes a to-be-crushed object supplied, an overload escaping section that escapes an overload of the crushing device, and a controller that controls the crushing machine; and

a server communicatively coupled to the self-traveling crushing machine, wherein

the crushing device is a jaw crusher in which the to-be-crushed object is supplied to a V-shaped space formed by a fixed jaw and a movable jaw and the movable jaw swings relative to the fixed jaw to crush the to-be-crushed object,

the controller comprises;

an escape-operation determining section that determines whether or not the overload escaping section has operated; and

an information output section that sends escape operation information to an outside when the escape-operation determining section determines that escape operation has been conducted, and

the server comprises;

an information receiving section that receives the escape operation information sent from the information output section; and

an escape-operation information accumulating section that accumulates the escape operation information received by the information receiving section in association with the self-traveling crushing machine from which the escape operation information is sent.

8. The administrative system of the self-traveling crushing machine according to claim 7, wherein

the server further comprises:

an escape-operation count determining section that determines whether or not a count of the escape operation information accumulated in the escape-operation information accumulating section is not less than a predetermined threshold; and

a notifier that notifies that the count is not less than the threshold when the escape-operation count determining section determines that the count is not less than the threshold.

9. The administrative system of the self-traveling crushing machine according to claim 8, wherein

the notifier comprises an alarm-information sending section that sends alarm information to a notification target selected from the at least one self-traveling crushing machine, and

the controller of the self-traveling crushing machine comprises an alarm calling section that calls an alarm when the alarm information is received.