Interchangeable coaxial automatic fine tuning lifting device and mounting method thereof

Abstract

The invention relates to a lifting device particularly for a large lifting height. The lifting device comprises a basic frame, a lifting frame and a driving device, wherein the driving device comprises a first hydraulic driving unit and a second hydraulic driving unit which are arranged in left-right symmetry, and a plurality of table sensors; the table sensors are used for detecting whether one side of the lifting frame reaches a target table or not; a third hydraulic driving unit is arranged between the lifting frame and the basic frame; a hydraulic cylinder of the first or second hydraulicdriving unit is coaxial or collinear with a hydraulic cylinder of the third hydraulic driving unit; the first, second and third hydraulic driving units have the same performance and size. According tothe lifting device, the third hydraulic driving unit can perform interchangeable coaxial automatic fine tuning on the lifting frame when the lifting frame inclines, the lifting frame is automaticallylevelled and is not liable to incline during the multiple-time back-and-forth process, and stationarity, reliability and adaptability of the lifting frame are effectively improved.

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 reliability are easily affected by adverse environments or poor maintenance and greatly reduced

[0005] On the other hand, the force application position of the adjustment device that reduces the inclination of the lifting frame is often different from the force application position of the drive device of the lifting device itself, and the extra torque during the adjustment process is likely to cause a new inclination and increase the internal resistance of the lifting device , reducing the stability and service life of the lifting device

When the force application position of the adjustment device for reducing the inclination of the lifting frame is the same as the force application position of the driving device of the lifting device itself, it is generally necessary to use a driving device different from the driving device of the lifting device itself, which is not convenient for mutual interaction between hydraulic cylinders. It is not convenient to simplify the design and manufacture

[0006] In particular, solving the tilting problem of the lifting frame by manual operation will easily increase the workload of the operator, require special training for the operator, require high quality of the operator, and have a high risk of misoperation by the operator

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