ROTATION CONTROL DEVICE FOR WORKING MACHINE

• US 20080082240A1
• Filed: 09/26/2007
• Published: 04/03/2008
• Est. Priority Date: 09/29/2006
• Status: Active Grant

• Current Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Original Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Inventors: KAGOSHIMA, Masayuki, KOMIYAMA, Masayuki
• Granted Patent: US 8,798,872 B2
• Time in Patent Office: Days
• US Class Current: 701/50
• CPC Class Codes: E02F 9/123 Drives or control devices specially adapted therefor E02F9/125 and E02F9/128 take precedence
• CPC Class Codes: E02F 9/2075 of the hybrid type for vehicles in general B60W20/00

Abstract

In a rotation control device for rotating a rotation motor at speed in accordance with a boom raising operation amount, at the time of a combined operation for simultaneously performing a rotation action and a boom raising action, a limitation value of rotation torque in accordance with the boom raising operation amount is determined by rotation torque limitation value setting means of a controller, the limitation value serving as a rotation torque limitation value is sent to rotation speed control means, and a command value of the rotation torque is torque-limited by rotation torque limiting means.

Claims

1. A rotation control device for working machine, comprising:

a rotation body;

a rotation motor for rotating and driving said rotation body;

a hydraulic actuator driven by pressure oil from a hydraulic pump;

rotation operation means for sending a rotation signal to said rotation motor;

hydraulic actuator operation means for sending an action signal to said hydraulic actuator;

rotation operation amount detecting means for detecting a rotation operation amount which is an operation amount of said rotation operation means;

hydraulic actuator operation amount detecting means for detecting a hydraulic actuator operation amount which is an operation amount of said hydraulic actuator operation means; and

control means for controlling said rotation motor on the basis of the signals from both said operation amount detecting means, the control means being adapted;

(A) to control said rotation motor at speed in accordance with the rotation operation amount, and

(B) to torque-control said rotation motor in the direction of slowing down acceleration of the rotation in accordance with an increase in the hydraulic actuator operation amount at the time of a combined operation for simultaneously performing a rotation action and a hydraulic action by said hydraulic actuator.

2. The rotation control device for working machine according to claim 1, wherein

said control means torque-controls said rotation motor in the direction of reducing rotation torque in accordance with the increase in the hydraulic actuator operation amount at the time of the combined operation.

3. The rotation control device for working machine according to claim 1, wherein

said control means torque-controls said rotation motor in the direction of reducing the rotation acceleration in accordance with the hydraulic actuator operation amount at the time of the combined operation.

4. The rotation control device for working machine according to claim 1, wherein

a boom cylinder for raising and lowering a boom is provided as said hydraulic actuator, boom raising operation means for sending a command for raising the boom is provided as said hydraulic actuator operation means, boom raising operation amount detecting means for detecting an operation amount of said boom raising operation means is provided as said hydraulic actuator operation amount detecting means, and said control means torque-controls said rotation motor in the direction of slowing down the acceleration of the rotation in accordance with an increase in the boom raising operation amount.