Drive control apparatus for forklift
AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorsHidenori Oka, Tadashi Yamada, Toshikazu Kamiya, Masayuki Takahashi, Kimihide Hasegawa, Hirokazu Kobayashi
Life of this patent
Estimating the term…
Abstract
A load determining section of a drive control apparatus for forklift determines a load state related to a loading attachment. In a case where a connection determining section determines switching to a connection state, if the load state determined by the load determining section requires that driving of a vehicle body be limited, a disconnection control section forcibly disconnects a transmission of a driving force to a drive wheel. Thus, the forklift is prevented from being started in a state that is likely to make the driving of the forklift unstable.
Claims21
A drive control apparatus for a forklift,
- wherein the forklift includes a vehicle body, a drive wheel provided to the vehicle body, an engine, a power transmission mechanism interposed between the engine and the drive wheel, and a loading attachment that is provided at a front portion of the vehicle body and mounts a load, and
- wherein the power transmission mechanism is switchable between a connection state for transmitting power of the engine to the drive wheel and a disconnection state for not transmitting the power of the engine to the drive wheel, wherein the forklift travels using the power of the engine as a driving force, the drive control apparatus comprising:
- a connection determining section that determines whether the power transmission mechanism is switched from the disconnection state to the connection state in response to an operation by a driver;
- a load determining section that determines a load state related to the loading attachment;
- and
- a disconnection control section, wherein, in a case where the connection determining section determines switching to the connection state, if the load state determined by the load determining section requires that the driving of the vehicle body be limited, the disconnection control section forcibly disconnects the transmission of the driving force to the drive wheel.
A drive control apparatus for a forklift, wherein the forklift includes a vehicle body, a drive wheel provided to the vehicle body, an engine, a power transmission mechanism interposed between the engine and the drive wheel, and a loading attachment that is provided at a front portion of the vehicle body and mounts a load,
- wherein the power transmission mechanism is switchable between a connection state for transmitting power of the engine to the drive wheel and a disconnection state for not transmitting the power of the engine to the drive wheel, wherein the forklift travels using the power of the engine as a driving force, the drive control apparatus comprising:
- a connection determining section that determines whether the power transmission mechanism is switched from the disconnection state to the connection state in response to an operation by a driver;
- an engine speed determining section for determining an engine speed, wherein a limitation engine speed is set higher than at least an idle speed of the engine, and
- a disconnection control section, wherein, in a case where the connection determining section determines switching to the connection state, if the engine speed determined by the engine speed determining section is equal to or greater than the limitation engine speed, the disconnection control section forcibly disconnects the transmission of the driving force to the drive wheel.
Dependencies are inferred from the claim text.