Shovel

Patent metadata

Field	Value
Publication number	US-11242666-B2
Application number	US-201916357784-A
Country	US
Kind code	B2
Filing date	Mar 19, 2019
Priority date	Sep 30, 2016
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

A shovel includes a traveling body, an upper turning body turnably provided on the traveling body, an attachment including a boom, an arm, and a bucket and attached to the upper turning body, and a processor. The processor is configured to correct the motion of the attachment in such a manner as to control a slip of the traveling body toward the back in the extension direction of the attachment.

First claim

What is claimed is:

1. A shovel comprising:
a traveling body;
an upper turning body turnably provided on the traveling body,
an attachment including a boom, an arm, and a bucket and attached to the upper turning body; and
a processor configured to correct a motion of the attachment such that F 1 sin η 1 <μMg holds, where η 1 is an angle formed by a boom cylinder of the attachment and a vertical axis, F 1 is a force exerted on the upper turning body by the boom cylinder, μ is a coefficient of static friction, M is a weight of a vehicle body of the shovel, and g is gravitational acceleration.

2. The shovel as claimed in claim 1 , further comprising:
a sensor configured to detect a motion of the traveling body,
wherein the processor is configured to correct the motion of the attachment in response to detection of a slip of the traveling body or a sign thereof based on an output of the sensor.

3. The shovel as claimed in claim 1 , wherein the processor is configured to be disabled from correcting the motion of the attachment such that F 1 sin η 1 <μMg holds, based on an input of an operator.

4. The shovel as claimed in claim 1 , wherein the processor is further configured to notify an operator of and alert the operator to an occurrence of a slip of the traveling body.

5. The shovel as claimed in claim 1 , wherein the processor is configured to correct a motion of the boom cylinder.

6. The shovel as claimed in claim 2 , wherein the processor is configured to correct the motion of the boom cylinder based on a rod pressure and a bottom pressure of the boom cylinder.

7. The shovel as claimed in claim 1 , wherein the processor is further configured to control a rod pressure of the boom cylinder.

8. The shovel as claimed in claim 1 , wherein the processor is further configured to correct a motion of an arm cylinder of the attachment.

9. The shovel as claimed in claim 8 , wherein the processor is configured to correct the motion of the arm cylinder in such a manner as to prevent a bottom pressure of the arm cylinder from exceeding a maximum allowable value.

Assignees

• Sumitomo Heavy Industries

Inventors

• Okada Junichi
• Hiranuma Kazunori

Classifications

• E02F3/425

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

• E02F9/264

  Sensors and their calibration for indicating the position of the work tool · CPC title

• E02F9/2221

  Control of flow rate; Load sensing arrangements (E02F9/2203 take precedence over E02F9/2221) · CPC title

• E02F9/2004

  Control mechanisms, e.g. control levers (control levers per se G05G) · CPC title

• E02F9/2037 Primary

  Coordinating the movements of the implement and of the frame · CPC title