Overload protection device for electric hoist crane
An overload protection, electric hoist technology, used in safety devices, transportation and packaging, load hanging components, etc., can solve problems such as the limit of the lifting height of the hook, inaccurate information collected, hidden dangers, etc. Smooth, volume-reducing effect
Inactive Publication Date: 2010-06-02
TIANJIN HOISTING EQUIP
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Problems solved by technology
see Figure 4 , the existing one mainly installs a tension plate on the suspension beam, a lifting weight limiter for collecting tension plate tension is installed on the tension plate, and a wedge sleeve is installed at the lower end of the tension plate. This structure has the advantages of large volume, high cost, and the hook The rising height of the tension plate is limited to a certain extent; in addition, because the tension plate is in a stressed state for a long time, the tensile deformation of the tension plate will change over time, resulting in inaccurate information collection. Hidden danger
Method used
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[0015] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
[0016] see Figure 1 to Figure 3 , an overload protection device for an electric hoist crane, including a suspension beam 1 installed on a lanyard device (not shown in the figure), a lifting weight limiter 2, and a wedge sleeve 4 with a wire rope 3 installed, the suspension beam 1 The wedge sleeve 4 is installed inside through the pin shaft 5, and the eccentric moment plate 6 is also installed on the pin shaft 5. The middle bending part 6-1 of the eccentric moment plate 6 is installed on the suspension beam 1 through the pin shaft 6-2, and the eccentric moment plate The signal acquisition end 6-3 of 6 is made into a horizontal section, and a horizontal bottom plate 6-4 is installed on the top of the horizontal section, and an elastic element ...
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The invention relates to an overload protection device for an electric hoist crane, which comprises a suspending beam, a hoist weighting limiter and a taper sleeve provided with a hoisting cable, and is characterized in that: the inside of the suspending beam is provided with the taper sleeve through a pin roll; an eccentric moment plate is arranged on the pin roll; the middle bent part of the eccentric moment plate is arranged on the suspending beam through a pin roll; a signal acquisition end of the eccentric moment plate is made into a horizontal section; the upper part of the horizontal section is provided with a horizontal bottom plate on which an elastic element is arranged; the hoist weighting limiter is arranged over the elastic element, and is a pressure type hoist weighting limiter; a gap is reserved between the bottom surface of the hoist weighting limiter and the elastic element; and the suspending beam on the outer side of the elastic element is provided with a sensor for measuring displacement and deformation of the elastic element in the horizontal direction. The overload protection device has the advantages of compact structure, small volume, high sensitivity and high safety performance.
Description
technical field [0001] The invention belongs to the technical field of crane manufacturing, in particular to an overload protection device for an electric hoist crane. Background technique [0002] At present, cranes are widely used in aviation, aerospace, nuclear power and other fields, and electric hoists are an important part of cranes, and they are widely used in many fields. Due to the particularity of many workplaces, for the purpose of safety protection, it is forbidden to lift heavy objects with overload. The General Administration of Quality Supervision, Inspection and Quarantine issued on February 21, 2008, and officially implemented on August 1, 2008, the "Safety Technical Supervision Regulations for Hoisting Machinery - Bridge Cranes". Article 69 stipulates that all cranes must be installed The weight limiter shows the importance of installing safety protection devices. see Figure 4 , the existing one mainly installs a tension plate on the suspension beam, a l...
Claims
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IPC IPC(8): B66C15/06B66C13/16
Inventor 马金桥李福森
Owner TIANJIN HOISTING EQUIP