Hoisting clamp of well lid milling machine
A milling machine and fixture technology, which is applied in the direction of hoisting device, hoisting device, etc., can solve problems such as apex slippage, single nut design is large, bulky, etc., and achieve the effect of reduced nut specification, easy tightening, and simple structure
Pending Publication Date: 2019-11-01
SHANDONG IND TECH RES INST OF ZHEJIANG UNIV +1
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Problems solved by technology
[0005] The main defects of the hoisting fixture of the known manhole cover milling machine at present: 1) a single nut is tensed, and the force on the four plugs is uneven. In actual situations, only three or two points can be tightened, and one apex is likely to slip when lifting; 2) A single nut is tensioned and cannot provide sufficient jacking force, or the design of a single nut is very large and cumbersome
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[0024] The structures involved in the present invention or the technical terms used are further described below. These descriptions are only used as examples to illustrate how the present invention is implemented, and do not constitute any limitation to the present invention.
[0025] Such as Figure 1-3 As shown, a hoisting fixture for a manhole cover milling machine includes a lifting disc 1 and a tensioning mechanism 2. The tensioning mechanism 2 includes a tensioning member 21 arranged on the lifting disc 1, a nut 22 and a nut 22 sleeved outside the tensioning member 21. The top pressure piece 23, the tension piece 21 is in clearance fit with the top pressure piece 23, the nut 22 is screwed on the tension piece 21, and the tension mechanism is provided with two groups, which are respectively located on both sides of the lifting plate. The tensioning mechanism 2 is provided with two groups, and each group has a tensioning piece 21, a nut 22 and a pressing piece 23. When in...
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The invention discloses a hoisting clamp of a well lid milling machine. The hoisting clamp comprises a lifting disc and tension mechanisms, wherein each tension mechanism comprises a tension piece arranged on the lifting disc, a nut and a jacking piece sleeving the outside of the tension piece; the tension pieces are in clearance fit with the jacking pieces, the nuts are screwed on the tension pieces, and the two tension mechanisms are arranged at the two sides of the lifting disc respectively. The two tension mechanisms are symmetrically arranged, the two nuts are screwed tightly to squeeze the inner wall of a wellhead, four vertexes are uniformly stressed simultaneously, and when the lifting disc is lifted, the phenomenon of single-point slippage does not easily occur.
Description
technical field [0001] The invention relates to the field of clamps, more specifically, it relates to a hoisting clamp for a manhole cover milling machine. Background technique [0002] The following background art is provided to help the reader understand the present invention and is not to be admitted as prior art. [0003] In the city, many inspection wells can be set due to the needs of water supply, electric power, telecommunications, gas pipelines, etc.; usually the weakest and most easily broken places of inspection wells are inspection well covers and edge roads. At present, the technical solution for repairing the manhole cover and its edge is usually to separate the manhole cover from the surrounding cement pavement, and then use the clamp to take out the manhole cover. Fixtures for manhole mouths of different specifications. [0004] At present, the principle of the tooling fixture for extracting the inspection well seat adopts the principle of helical tension, ...
Claims
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IPC IPC(8): B66F19/00
CPCB66F19/005
Inventor 王彪邵立宗兆浩张红武杨超黄冬梅
Owner SHANDONG IND TECH RES INST OF ZHEJIANG UNIV