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Drive control apparatus for forklift

A technology for equipment and forklifts, which is applied in the field of drive control equipment, can solve the problems that the drop of engine speed cannot be executed early enough, the drive is unstable, and the stability cannot be guaranteed.

Active Publication Date: 2009-07-29
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under severe loading conditions, for example, when the load is carried at a relatively high position, the stability may not be guaranteed
As a result, depending on the load state, the reduction in engine speed cannot be performed early enough (engine control is not early enough)
This makes the drive unstable at startup

Method used

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  • Drive control apparatus for forklift
  • Drive control apparatus for forklift
  • Drive control apparatus for forklift

Examples

Experimental program
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Embodiment Construction

[0035] Refer to the attached Figures 1 to 9 A drive control device CD for a forklift 10 according to a first embodiment of the present invention is described. Hereinafter, the direction in which the driver of the forklift 10 faces is defined as the front. Rear, above, below, left, and right are defined with reference to the front.

[0036] figure 1 is a side view of the forklift 10 . Such as figure 1 As shown in , the forklift 10 includes a carrying device 12 located at the front of the vehicle body 11 . A cab 13 is formed in a middle portion of the vehicle body 11 . Drive wheels (front wheels) 14 are located at the front and lower side of the vehicle body 11 , and steering wheels 15 are located at the rear and lower side of the vehicle body 11 . The vehicle body 11 is also equipped with a transmission 18 having a torque converter 17 . The torque converter 17 forms a power transmission mechanism. Engine 16 is connected to drive wheels 14 via a transmission 18 having a...

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Abstract

A load determination section (54) of a drive control device (52, 53) for a forklift (10) determines a load state related to a load carrying device (22). In the case that the connection determination section (54, S20) determines to switch to the connection state, if the load state determined by the load determination section (54, S10) requires the driving of the vehicle body (11) to be limited, the disconnection control section (54 , S25) forcibly disconnect the transmission of driving force to the drive wheel (14). Therefore, the forklift (10) is prevented from being started in a state that may make driving of the forklift unstable.

Description

[0001] Field technology [0002] The present invention relates to a drive control device for controlling the drive of a forklift. Background technique [0003] Generally, forklifts are widely used as industrial vehicles to handle loads (lift and place loads) in factories. Due to their specific application, the driving stability of such trucks varies greatly depending on the load state. For example, the center of gravity of the vehicle changes and there is a difference in driving stability between unloaded and loaded. When a load is carried, the driving stability varies depending on the weight of the load, the height of the fork supporting the load, and the inclination angle of the fork. Therefore, generally, a technique of limiting driving of a forklift according to a load state to improve driving stability of a vehicle is disclosed in Japanese Patent Laid-Open No. 2001-163597. In the document of Publication No. 2001-163597, the minimum acceleration value that causes the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66F9/075
Inventor 冈秀顺山田忠神谷利和高桥正幸长谷川公秀小林弘和
Owner TOYOTA IND CORP
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