OPERATION DEVICE AND HYDRAULIC SYSTEM

• US 20180142709A1
• Filed: 11/24/2017
• Published: 05/24/2018
• Est. Priority Date: 11/24/2016
• Status: Active Grant

• Current Assignee: Kawasaki Jukogyo Kabushiki Kaisha
• Original Assignee: Kawasaki Jukogyo Kabushiki Kaisha
• Inventors: KONDO, Akihiro, SHIMIZU, Hiroaki
• Granted Patent: US 10,443,629 B2
• Time in Patent Office: Days
• CPC Class Codes: F15B 11/10 in which the servomotor position is a function of the pressure also pressure regulators as operating means for such systems, the device itself may be a position indicating system
• CPC Class Codes: F15B 19/002 Calibrating
• CPC Class Codes: F15B 2211/20546 variable capacity
• CPC Class Codes: F15B 2211/255 Flow control functions
• CPC Class Codes: F15B 2211/329 actuated by fluid pressure
• CPC Class Codes: F15B 2211/6316 the pressure being a pilot pressure
• CPC Class Codes: F15B 2211/6346 representing a state of input means, e.g. joystick position
• CPC Class Codes: F15B 2211/6652 Control of the pressure source, e.g. control of the swash plate angle
• CPC Class Codes: F15B 2211/6654 Flow rate control
• CPC Class Codes: F15B 2211/6656 Closed loop control, i.e. control using feedback

Abstract

An operation device includes: an operating unit; a pilot valve that outputs a pilot pressure corresponding to an operating amount of the operating unit; an operating amount detection sensor that outputs an operating amount signal corresponding to the operating amount of the operating unit; a first bar code provided on the pilot valve and containing pilot pressure actual measurement information indicating a relationship between the operating amount of the operating unit and an actual measurement value of the pilot pressure outputted from the pilot valve; and a second bar code provided on the pilot valve and containing operating amount signal actual measurement information indicating a relationship between the operating amount of the operating unit and an actual measurement value of the operating amount signal outputted from the operating amount detection sensor.

Claims

1. An operation device comprising:

an operating unit;

a pilot valve that outputs a pilot pressure corresponding to an operating amount of the operating unit;

an operating amount detection sensor that outputs an operating amount signal corresponding to the operating amount of the operating unit;

a first bar code provided on the pilot valve and containing pilot pressure actual measurement information indicating a relationship between the operating amount of the operating unit and an actual measurement value of the pilot pressure outputted from the pilot valve; and

a second bar code provided on the pilot valve and containing operating amount signal actual measurement information indicating a relationship between the operating amount of the operating unit and an actual measurement value of the operating amount signal outputted from the operating amount detection sensor.

2. The operation device according to claim 1, wherein

at least one of the first bar code and the second bar code contains reading error prevention information for preventing an error when the at least one of the first bar code and the second bar code is read by a bar code reader.

3. The operation device according to claim 2, wherein

each of the pilot pressure actual measurement information and the operating amount signal actual measurement information contains a plurality of actual measurement points, and

the reading error prevention information contains a plurality of imaginary points set around each of the plurality of actual measurement points.

4. A hydraulic system comprising:

the operation device according to claim 1;

a control valve that is moved by the pilot pressure outputted from the pilot valve of the operation device;

a variable displacement pump that supplies hydraulic oil to an actuator via the control valve;

a flow rate adjuster that adjusts a discharge flow rate of the pump; and

a controller that controls the flow rate adjuster based on the operating amount signal outputted from the operating amount detection sensor of the operation device, wherein

the controller generates a map for modifying the operating amount signal outputted from the operating amount detection sensor based on the first bar code and the second bar code that are read by a bar code reader connected to the controller.

5. The hydraulic system according to claim 4, wherein

the controller stores the generated map in a storage device, and

when the operation device is operated, the controller performs arithmetic operation based on the stored map.