Blade control device for work machinery
a control device and work machinery technology, applied in mechanical machines/dredgers, soil-shifting machines/dredgers, constructions, etc., can solve the problems of limitative effect of insufficiently considered, and generated etc., to achieve effective suppressing waviness of execution surfaces
Pending Publication Date: 2021-10-21
KOBE STEEL LTD +1
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The invention provides a device that controls the raising and lowering of a blade on a work machine. The device helps to prevent the surface from being uneven when the blade is being used.
Problems solved by technology
The load control device recited in Patent Literature 1, however, has a problem of waviness of an execution surface generated due to raising and lowering operation of a blade.
In the blade control device of Patent Literature 2, therefore, an effect of suppressing waviness of the execution surface is limitative and cannot be always considered sufficient.
Method used
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Embodiment Construction
[0022]A preferred embodiment of the present invention will be described with reference to the drawings.
[0023][Overall Structure of Work Machine]
[0024]FIG. 1 is a side view showing a hydraulic excavator 1 as an example of a work machine in which a blade control device according to an embodiment of the present invention is provided. The hydraulic excavator 1 includes a travelling device 2 (lower travelling body) capable of travelling on the ground G, a vehicle body 3 (upper slewing body) mounted on the travelling device 2, a work device mounted on the vehicle body 3, and a blade 4 mounted on the travelling device 2 or the vehicle body 3. The travelling device 2 and the vehicle body 3 constitute a machine body of the work machine. The vehicle body 3 has a slewing frame, an engine, a driver's room, and the like.
[0025]The work device mounted on the vehicle body 3 includes a boom 5, an arm 6, and a bucket 7. The boom 5 has a base end portion supported at a front end of the slewing frame s...
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In a blade control device, a blade operation control part outputs a command for raising and lowering a blade such that a position deviation between a blade position calculated by a blade position calculating part and a blade target position approaches zero in a case where a blade load is equal to or less than a second load threshold value, and outputs a command for raising the blade in a case where the blade load is greater than the second load threshold value. In a case where an update condition is satisfied, the update condition being set in advance so as to associate the blade load and a first load threshold value with each other, a target position setting part updates the blade target position using the blade position obtained when the update condition is satisfied as a reference.
Description
TECHNICAL FIELD[0001]The present invention relates to a blade control device provided in a work machine including a blade.BACKGROUND ART[0002]Conventionally, a work machine including a blade for use in digging of the ground, land grading, transport of sediments, and the like has been used widely. Patent Literature 1 discloses a load control device for a bulldozer, the load control device automatically controlling raising and lowering operation of a blade such that a blade load applied on the blade becomes substantially constant. The load control device recited in Patent Literature 1, however, has a problem of waviness of an execution surface generated due to raising and lowering operation of a blade.[0003]Patent Literature 2 discloses a blade control device intended to cope with the above-described problem of Patent Literature 1. Patent Literature 2 discloses that the blade is controlled so as not to be closer to the designed surface than the virtual designed surface is, and can be ...
Claims
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IPC IPC(8): E02F3/84E02F9/26
CPCE02F3/844E02F3/964E02F9/262E02F3/7618E02F9/265
Inventor SAWAMURA, TOSHIAKIMAEKAWA, SATOSHISUGANO, NAOKINODA, DAISUKEKAMIMURA, YUSUKE
Owner KOBE STEEL LTD