| 摘要 |
In a hydraulically controlled carrying and gripping device, of which solely the translatory cylinders (C1, C2) for the fork tines are shown, and in which clamping and opening movements by moving the fork tines towards and away from each other respectively may be performed under the control of a clamping valve (10), and in which the fork tines can be moved in the same direction to the right or left under the control of a lateral-shift valve (11), the main new feature is a volume limiter (12), e.g. in the form of a cylinder with a piston, inserted in the conduits to the lateral-shift valve (11), so as to limit the quantity of liquid flowing through this valve and hence through the translatory cylinders (C1, C2), so that the movements of the latter's piston rods and hence of the fork tines (not shown) are limited. With this arrangement, dangerously unsymmetrical loading of the carrying vehicle, e.g. a fork-lift truck (not shown) is avoided. |
