Shovel

Patent metadata

Field	Value
Publication number	US-2022010520-A1
Application number	US-202117448728-A
Country	US
Kind code	A1
Filing date	Sep 24, 2021
Priority date	Mar 29, 2019
Publication date	Jan 13, 2022
Grant date	—

Abstract

A shovel includes an attachment attached to a revolving upper body; and a control device including a memory and a processor configured to execute estimating a center of gravity of loaded matter loaded in the attachment, and calculating a weight of the loaded matter based on the estimated center of gravity of the loaded matter.

First claim

What is claimed is:

1 . A shovel comprising:
an attachment attached to a revolving upper body; and a control device including a memory and a processor configured to execute
estimating a center of gravity of loaded matter loaded in the attachment, and
calculating a weight of the loaded matter based on the estimated center of gravity of the loaded matter.

2 . The shovel as claimed in claim 1 , wherein the attachment includes a boom, an arm, and a bucket, and
wherein the estimating estimates the center of gravity of the loaded matter loaded in the bucket in a state of the bucket regarded as taking a predetermined angle.

3 . The shovel as claimed in claim 2 , wherein the state of the bucket regarded as taking the predetermined angle is a state of the boom being at a location higher than a predetermined position.

4 . The shovel as claimed in claim 2 , further comprising:
a space recognition device configured to capture an image of the bucket, wherein whether or not the bucket is in the state regarded as taking the predetermined angle is determined based on the image captured by the space recognition device.

5 . The shovel as claimed in claim 1 , wherein the attachment includes a boom, an arm, and a bucket, the shovel further comprising:
a boom cylinder configured to drive the boom; an arm cylinder configured to drive the arm; and a bucket cylinder configured to drive the bucket, wherein the estimating estimates the center of gravity of the loaded matter based on a flow of hydraulic oil to the bucket cylinder.

6 . The shovel as claimed in claim 5 , further comprising:
a spool valve configured to control the flow and a direction of the hydraulic oil supplied to the bucket cylinder; and a spool displacement sensor configured to detect displacement of the spool valve, wherein the estimating estimates the center of gravity of the loaded matter based on the displacement of the spool displacement sensor.

7 . The shovel as claimed in claim 1 , wherein the processor is further configured to execute calculating a target excavation weight based on the weight of the loaded matter and a remaining loadable weight.

8 . The shovel as claimed in claim 7 , wherein the processor is further configured to execute setting a target trajectory as a trajectory to be traced by a predetermined part of the attachment, based on an excavation weight.

9 . The shovel as claimed in claim 8 , wherein the processor is further configured to execute using information on a landform before excavation starts, when setting the target trajectory.

10 . The shovel as claimed in claim 7 , wherein data related to a target construction surface is stored in advance in the memory in the control device.

11 . A control device of a shovel used in the shovel including an attachment attached to a revolving upper body, wherein the control device control device includes a memory and a processor configured to execute
estimating a center of gravity of loaded matter loaded in the attachment, and calculating a weight of the loaded matter based on the estimated center of gravity of the loaded matter.

12 . The control device of the shovel as claimed in claim 11 , wherein the processor is further configured to execute calculating a target excavation weight based on the weight of the loaded matter and a remaining loadable weight.

13 . The control device of the shovel as claimed in claim 11 , wherein the processor is further configured to execute setting a target trajectory as a trajectory to be traced by a predetermined part of the attachment, based on an excavation weight.

14 . The control device of the shovel as claimed in claim 13 , wherein the processor is further configured to execute using information on a landform before excavation starts, when setting the target trajectory.

Assignees

• Sumitomo Heavy Industries

Inventors

• Sano Yusuke
• Wu Chunnan
• Hiranuma Kazunori

Classifications

• E02F3/437

  providing automatic sequences of movements, e.g. linear excavation, keeping dipper angle constant · CPC title

• E02F9/2296

  Systems with a variable displacement pump · CPC title

• E02F9/265

  with follow-up actions (e.g. control signals sent to actuate the work tool) · CPC title

• E02F9/2292

  Systems with two or more pumps · CPC title

• E02F9/264

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