A-frame

A tripod and leg technology, applied in the field of measurement engineering, can solve the problems of difficult to achieve high-precision level adjustment, increase the telescopic step distance, difficult to high-precision adjustment, etc., and achieve the requirements of simple structure, adjustment, and reduction of manufacturing progress. Effect

Inactive Publication Date: 2016-02-10
NO 7 ENG CO LTD OF CHINA RAILWAY 19 BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is only a sliding fit and a locking device between the upper and lower legs of the sliding telescopic leg tripod, which makes it difficult to achieve high-precision level adjustment; while the integral gear teeth engage the upper and lower legs of the telescopic tripod The overall

Method used

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  • A-frame
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Examples

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Embodiment Construction

[0027] Such as figure 1 as shown, figure 1 It is the structural diagram of the triangular bracket of this embodiment; the triangular bracket includes an upper platform 100 and three legs 200 with the same structure, and the upper platform 100 is provided with levelness judgment tools such as level bubbles, and the three legs 200 are all retractable structures , and the array of three legs 200 is arranged under the upper platform 100, and the three legs 200 are hinged with the upper platform 100, and the upper platform 100 is realized by adjusting the different swing angles and telescopic lengths of the three legs 200. Level.

[0028] Such as figure 2 as shown, figure 2 It is a structural diagram of the leg 200 in this embodiment; the leg 200 includes an upper leg 210 and a lower leg 220; the upper leg 210 includes two long profiles 211, the long profiles 211 are made of wood, and the two long profiles 211 are fixed Installed on the connection block 214, and the two long ...

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PUM

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Abstract

The invention provides an A-frame. The A-frame comprises a main platform, three upper leg parts and three lower leg parts, wherein the three upper leg parts are all hinged with the main platform and are connected with the lower leg parts in a sliding manner, first clamping sleeves are arranged between the upper leg parts and the lower leg parts to complete primary locking, so that the rough adjustment is realized; racks are fixed at the lower leg parts, second clamping sleeves are arranged on the upper leg parts in a sleeving manner and are provided with gears, and the gears and the racks are meshed, so that the fine adjustment can be realized. The accurate levelness adjustment of the A-frame can be realized through coarse adjustment and fine adjustment on stretching lengths of the three upper leg parts and three lower leg parts. The A-frame has a simple structure, and is low in cost and convenient to operate.

Description

technical field [0001] The invention relates to the field of surveying engineering, in particular to a bracket for a surveying instrument. Background technique [0002] When the measuring instrument is used, it needs to be stable for a period of time after being erected at one point. When erecting the instrument, it is necessary to go through the two steps of "centering and leveling". Tripod legs to complete centering of circular level bubbles on the instrument. [0003] There are two kinds of existing tripods for measuring instruments, one is a sliding tripod with telescopic legs, and the other is an integral gear meshing telescopic tripod. There is only a sliding fit and a locking device between the upper and lower legs of the sliding telescopic leg tripod, which makes it difficult to achieve high-precision level adjustment; while the integral gear teeth engage the upper and lower legs of the telescopic tripod The overall gear teeth transmission between the lower legs ca...

Claims

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Application Information

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IPC IPC(8): G01D11/30
CPCG01D11/30
Inventor 杨新民
Owner NO 7 ENG CO LTD OF CHINA RAILWAY 19 BUREAU GRP
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