Interchangeable coaxial automatic fine tuning lifting device and mounting method thereof

Abstract

The invention relates to a lifting device, in particular for large lifting heights. It has a basic frame, a lifting frame and a driving device. The driving device includes a first hydraulic drive unit and a second hydraulic drive unit arranged symmetrically on the left and right, and several table sensors, which are used to detect whether a certain side of the lifting frame reaches the target. table top; a third hydraulic drive unit is arranged between the lifting frame and the basic frame, and the hydraulic cylinder of the first or second hydraulic drive unit is coaxial or collinear with the hydraulic cylinder of the third hydraulic drive unit; the first The first, second and third hydraulic drive units have the same performance and size. Since the third hydraulic drive unit can perform interchangeable coaxial automatic fine-tuning on the lifting frame when the lifting frame is tilted, the lifting frame can be automatically leveled during multiple round trips without tilting, effectively improving the stability of the lifting frame performance, reliability and applicability.

Description

technical field [0001] The invention relates to a large lifting device / lifting platform, especially suitable for large lifting heights, the lifting device has a basic frame, a lifting frame for receiving the working load and at least one set for positioning the lifting frame relative to the basic frame Vertical lift drive. Background technique [0002] This lifting device is used to lift the working load placed on the lifting frame. For example, in industrial production, the lifting device is used to lift or lower the material to a height of preferably 0.5m or even 20m or more, so that the material leaves the initial platform and reaches the target platform. [0003] Known lifting devices such as those described in PCT / EP2007 / 003519 are mainly suitable for small lifting heights, and cannot be used in applications with large lifting heights. Known lifting devices such as the lifting devices described in CN201120139819.8, etc. are suitable for large lifting heights and large...

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Problems solved by technology

[0003] Known lifting devices such as those described in PCT/EP2007/003519 are mainly suitable for small lifting heights, and cannot be used in applications with large lifting heights

Known lifting devices such as the lifting devices described in CN201120139819.8, etc. are suitable for large lifting heights and large-sized materials, but the driving devices on the left and right sides tend to have asynchronous problems when the center of gravity of the materials laterally deviates from the center of the lifting frame table top. Cause the lifting frame to tilt left and right, which brings inconvenience to production and use

[0004] At present, the traditional lifting device used to realize the vertical lifting of materials, especially the four-column lifting device, often relies on improving the hydraulic circuit to achieve synchronization. The disadvantage is that the hydraulic circuit is relatively complicated, and its synchronization is affected by various factors. Such as manufacturing errors, leakage, etc., and the reliability is limited, and it is still prone to out-of-sync problems after a period of use

If a high-end hydraulic circuit with high precision and reliability is used, its cost is relatively expensive, and the system stability and reliab

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