Loading machine control device and control method

Patent metadata

Field	Value
Publication number	US-11286638-B2
Application number	US-201816647723-A
Country	US
Kind code	B2
Filing date	Aug 13, 2018
Priority date	Jan 31, 2018
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

An avoidance position specification unit specifies an interference avoidance position that is higher than a loading object and has no loading object therebelow. A timing determination unit determines a swing start timing based on a remaining swing angle formed by a straight line that extends from a center of swing to a work equipment and a straight line that extends from the center of swing to an interference avoidance position, and a height of the interference avoidance position. An operation signal output unit outputs an operation signal of the work equipment in a case of not reaching the swing start timing and outputs an operation signal for swinging a swing body at swing speed higher than that when not reaching the swing start timing and an operation signal of the work equipment, in a case of reaching the swing start timing.

First claim

The invention claimed is:

1. A control device for controlling a loading machine including a swing body that swings around a center of swing and a work equipment that is attached to the swing body and has a bucket, the control device comprising:
an avoidance position specification unit that is configured to specify an interference avoidance position which is a bucket position that is higher than a loading object and has no loading object therebelow;
a timing determination unit that is configured to determine a swing start timing based on a remaining swing angle and a height of the interference avoidance position, the remaining swing angle being formed by a straight line that extends from the center of swing to the work equipment and a straight line that extends from the center of swing to the interference avoidance position in a plan view from above; and
an operation signal output unit that is configured to output an operation signal of the work equipment in a case of not reaching the swing start timing, and output an operation signal for swinging the swing body at swing speed higher than that when not reaching the swing start timing and an operation signal of the work equipment, in a case of reaching the swing start timing.

2. The control device according to claim 1 , further comprising:
a swing time specification unit that is configured to specify a required swing time required for swinging the swing body by the remaining swing angle; and
an arrival time specification unit that specifies an arrival time until a height of the bucket position reaches the height of the interference avoidance position,
wherein the timing determination unit determines the swing start timing based on the arrival time and the required swing time.

3. The control device according to claim 1 , further comprising:
an arrival time specification unit that is configured to specify an arrival time until a height of the bucket position reaches the height of the interference avoidance position; and
an angle estimation unit that is configured to specify an estimated swing angle by which swing is possible for the arrival time,
wherein the timing determination unit determines the swing start timing based on the estimated swing angle and the remaining swing angle.

4. The control device according to claim 1 , further comprising:
a swing time specification unit that is configured to specify a required swing time required for swinging the swing body by the remaining swing angle; and
a height estimation unit that is configured to specify an estimated bucket height to which the height of the bucket position is able to rise for the required swing time,
wherein the timing determination unit determines the swing start timing based on the estimated bucket height and the height of the interference avoidance position.

5. A control method of a loading machine including a swing body that swings around a center of swing and a work equipment that is attached to the swing body and has a bucket, the control method comprising the steps of:
specifying an interference avoidance position which is a bucket position that is higher than a loading object and has no loading object therebelow;
determining a swing start timing based on a remaining swing angle and a height of the interference avoidance position, the remaining swing angle being formed by a straight line that extends from the center of swing to the work equipment and a straight line that extends from the center of swing to the interference avoidance position in a plan view from above; and
outputting an operation signal of the work equipment in a case of not reaching the swing start timing; and
outputting an operation signal for swinging the swing body at swing speed higher than that when not reaching the swing start timing and an operation signal of the work equipment, in a case of reaching the swing start timing.

Assignees

• Komatsu Mfg Co Ltd

Inventors

• Saigo Yusuke
• Hatake Kazuhiro

Classifications

• E02F9/2033 Primary

  Limiting the movement of frames or implements, e.g. to avoid collision between implements and the cabin (sub-groups of E02F3/431 of E02F3/435 take precedence; for turntables E02F9/123) · CPC title

• E02F3/435 Primary

  for dipper-arms, backhoes or the like · CPC title

• E02F9/262

  with follow-up actions to control the work tool, e.g. controller · CPC title

• E02F3/439

  Automatic repositioning of the implement, e.g. automatic dumping, auto-return (E02F3/438 takes precedence) · CPC title

• E02F9/2296

  Systems with a variable displacement pump · CPC title