ROTATING PARKING BRAKE CONTROL DEVICE FOR CONSTRUCTION MACHINERY

• US 20130060432A1
• Filed: 05/13/2011
• Published: 03/07/2013
• Est. Priority Date: 05/13/2010
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Morinaga, Jun, Take, Hiroaki, Akushichi, Shuki
• Granted Patent: US 9,212,467 B2
• Time in Patent Office: Days
• US Class Current: 701/50
• CPC Class Codes: E02F 9/128 Braking systems
• CPC Class Codes: E02F 9/2095 Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans control of hydraulic driven equipment E02F9/22
• CPC Class Codes: F15B 11/16 with two or more servomotors

Abstract

The disclosed rotating parking brake control device obviates the need for an operator to operate an emergency-stop switch. A hybrid controller, to which a brake is connected, outputs a drive control signal to a rotating electric motor to control drive of an upper rotating body and also controls the brake by generating a brake release command signal and outputting the brake release command signal to the brake. A pump controller also generates a brake release command signal, and the brake release command signal generated by the pump controller is transmitted to the hybrid controller through an inter-controller signal line. The brake release command signal is outputted to the brake only when the brake release command signal is generated by the hybrid controller and the brake release command signal is transmitted from the pump controller through the inter-controller signal line.

Claims

1. A rotating parking brake control device for construction machinery to control a rotating parking brake of the construction machinery, comprising:

first control means which controls drive of a rotation electric motor; and

second control means which is control means independent of the first control means and generates a brake release command signal to output it to the brake.

2. The rotating parking brake control device for construction machinery according to claim 1, wherein:

the first control means and the second control means each generates the brake release command signal; and

the brake release command signal is transmitted from one control means to the other control means, and when the brake release command signal is inputted to the other control means, the other control means outputs the brake release command signal to the brake.

3. The rotating parking brake control device for construction machinery according to claim 2, wherein:

the brake release command signal is transmitted from the one control means to the other control means through a signal transmission line for supplying an electric power to an electric equipment.

4. The rotating parking brake control device for construction machinery according to claim 2, wherein the first control means and the second control means are connected through an in-vehicle network.

5. The rotating parking brake control device for construction machinery according to claim 1, further comprising:

detection means which detects that an operation member for rotational operation of an upper rotating body was operated from its neutral position, wherein;

the first control means and the second control means generate the brake release command signal when the detection means detects that the operation member was operated from its neutral position.

8. The rotating parking brake control device for construction machinery according to claim 3, wherein the first control means and the second control means are connected through an in-vehicle network.

9. The rotating parking brake control device for construction machinery according to claim 2, further comprising:

detection means which detects that an operation member for rotational operation of an upper rotating body was operated from its neutral position, wherein;

the first control means and the second control means generate the brake release command signal when the detection means detects that the operation member was operated from its neutral position.

10. The rotating parking brake control device for construction machinery according to claim 3, further comprising:

detection means which detects that an operation member for rotational operation of an upper rotating body was operated from its neutral position, wherein;

the first control means and the second control means generate the brake release command signal when the detection means detects that the operation member was operated from its neutral position.

11. The rotating parking brake control device for construction machinery according to claim 4, further comprising:

detection means which detects that an operation member for rotational operation of an upper rotating body was operated from its neutral position, wherein;

the first control means and the second control means generate the brake release command signal when the detection means detects that the operation member was operated from its neutral position.

6. A rotating parking brake control device for construction machinery, which is provided with control means which controls a rotating parking brake of the construction machinery, wherein:

the control means is configured to include;

first control means connected to the brake, which controls drive of an upper rotating body, and generates a brake release command signal;

second control means which is control means independent of the first control means, and generates a brake release command signal; and

an inter-control means signal line which transmits the brake release command signal generated by the second control means to the first control means; and

the first control means is configured to output the brake release command signal to the brake when the brake release command signal is generated by the first control means and the brake release command signal is transmitted from the second control means through the inter-control means signal line.

7. A rotating parking brake control device for construction machinery, which is provided with control means which controls a rotating parking brake of the construction machinery, wherein:

the control means is configured to include;

first control means which controls drive of an upper rotating body and generates a brake release command signal;

second control means which is control means independent of the first control means, connected to the brake, and generates a brake release command signal; and

an inter-control means signal line which transmits the brake release command signal generated by the first control means to the second control means, and

the second control means is configured to output the brake release command signal to the brake when the brake release command signal is generated by the second control means and the brake release command signal is transmitted from the first control means through the inter-control means signal line.