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US 12,565,755 B2Granted
Work machine and operating device for work machine
AssigneeSumitomo Construction Machinery Co., Ltd.
InventorYouji Misaki
Life of this patent
Estimating the term…
Abstract
A work machine includes an operating device operable in a first direction and a second direction, a hydraulic pump configured to supply hydraulic oil, a hydraulic actuator, a directional control valve configured to control the hydraulic oil flowing from the hydraulic pump to the hydraulic actuator, and a hardware processor configured to control the directional control valve based on the amount of operation of the operating device. The operating device is structured or placed such that a force is likely to escape in the first direction when the operating device is operated in the second direction. The operating device is configured such that a dead area increases with respect to the first direction in which the force is likely to escape.
Claims10
A work machine comprising:
- an operating device including
- an operating lever configured to tilt in a first direction, a second direction, a third direction, and a fourth direction, the first direction and the second direction being opposite to each other, the third direction and the fourth direction being opposite to each other;
- a cam fixed to the operating lever;
- and
- a first pusher, a second pusher, a third pusher, and a fourth pusher contacting the cam and configured to be pushed by the cam when the operating lever tilts in the first direction, the second direction, the third direction, and the fourth direction, respectively, the first pusher including a single first return spring configured to return the operating lever tilted in the first direction to a neutral position, the second pusher including a single second return spring configured to return the operating lever tilted in the second direction to the neutral position, the third pusher including a single third return spring configured to return the operating lever tilted in the third direction to the neutral position, the fourth pusher including a single fourth return spring configured to return the operating lever tilted in the fourth direction to the neutral position;
- a hydraulic pump configured to supply hydraulic oil;
- a hydraulic actuator;
- a directional control valve configured to control the hydraulic oil flowing from the hydraulic pump to the hydraulic actuator;
- and
- a hardware processor configured to control the directional control valve based on an amount of operation of the operating lever,
- wherein the hardware processor is configured to set a dead area such that the dead area increases with respect to the first direction and the second direction as the operating lever tilts in the second third direction or the fourth direction,
- the operating lever is configured to tilt with a maximum operation amount to maximize a spool stroke amount of the directional control valve, and
- the hardware processor is configured to set the maximum operation amount of the operating lever such that the maximum operation amount in each of the first direction and the second direction decreases as the amount of operation in the third direction or the fourth direction increases.
10 more elements
An operating device for a work machine, the operating device comprising:
- an operating lever configured to tilt in a first direction, a second direction, a third direction, and a fourth direction, the first direction and the second direction being opposite to each other, the third direction and the fourth direction being opposite to each other;
- a cam fixed to the operating lever;
- and
- a first pusher, a second pusher, a third pusher, and a fourth pusher contacting the cam and configured to be pushed by the cam when the operating lever tilts in the first direction, the second direction, the third direction, and the fourth direction, respectively, the first pusher including a single first return spring configured to return the operating lever tilted in the first direction to a neutral position, the second pusher including a single second return spring configured to return the operating lever tilted in the second direction to the neutral position, the third pusher including a single third return spring configured to return the operating lever tilted in the third direction to the neutral position, the fourth pusher including a single fourth return spring configured to return the operating lever tilted in the fourth direction to the neutral position,
- wherein a dead area of the operating device is so set as to increase with respect to the first direction and the second direction as the operating lever tilts in the third direction or the fourth direction,
- the operating lever is configured to tilt with a maximum operation amount to maximize a spool stroke amount of the directional control valve, and
- the hardware processor is configured to set the maximum operation amount of the operating lever such that the maximum operation amount in each of the first direction and the second direction decreases as the amount of operation in the third direction or the fourth direction increases.
4 more elements
Dependencies are inferred from the claim text.