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6. 发明授权

US6082212A Multi-function control handle 失效
标题翻译：多功能控制手柄
公开(公告)号：US6082212A
公开(公告)日：2000-07-04
申请号：US119100
申请日：1998-07-20
申请人： Brent A. Bergman , Allen T. Trego
发明人： Brent A. Bergman , Allen T. Trego
IPC分类号： G05G9/047 , G05G5/03
CPC分类号： G05G9/047 , G05G2009/04766 , G05G2009/04774 , Y10T74/20201
摘要： A handle mounted generally horizontally on a fork lift truck for controlling forward and reverse speed of movement of the truck and raising and lowering forks is carried by a control device. The control device includes a shaft with a centrally positioned spherical section contained in a socket in a support member. The shaft is therefore free to rotate about the center of the sphere. A ramp cam is mounted on the support member surrounding the shaft. A slider mounted on the shaft is pressed against the cam by action of a spring. This arrangement assures that the shaft and control handle remain centered until acted upon by an operator of the truck. Two linear potentiometers provide electrical output signals representing the X (horizontal) and Y (vertical) positions of the end of the shaft opposite the control handle. The cam is provided with four distinct compound surfaces. For vertical movement of the handle, the slopes of the two lower surfaces are greater than the slopes of the two upper surfaces. The slopes of each surface are also different in the forward and reverse direction. This arrangement provides the illusion that the same force is required to move the handle in any direction. A detent in the center of the cam requires a slightly greater force to move the handle from the center position.
摘要翻译：大体上水平地安装在叉式起重车上的把手用于控制卡车的前进和后退的速度以及提升和降低叉的手柄由控制装置承载。控制装置包括具有中心定位的球形部分的轴，容纳在支撑构件中的插座中。因此，轴可以围绕球体的中心自由旋转。斜坡凸轮安装在围绕轴的支撑构件上。安装在轴上的滑块通过弹簧的作用被压靠在凸轮上。这种布置确保轴和控制手柄保持居中，直到卡车的操作者作用。两个线性电位器提供表示与控制手柄相对的轴端部的X（水平）和Y（垂直）位置的电气输出信号。凸轮设有四个不同的复合表面。对于手柄的垂直运动，两个下表面的斜面大于两个上表面的斜面。每个表面的斜面在正向和反向方向上也不同。这种布置提供了在任何方向上移动手柄所需的相同的力的错觉。在凸轮中心的棘爪需要稍微更大的力来将手柄从中心位置移动。

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