CN201059979Y

CN201059979Y - Precision centering trivets

Info

Publication number: CN201059979Y
Application number: CNU2007200798479U
Authority: CN
Inventors: 陈心一; 袁成忠; 周敬勇; 陶波; 姚云峰; 杨娱; 彭维国; 姜燮荣
Original assignee: CHENGDU PULUOMI NEW TECHNOLOGY Co Ltd
Current assignee: CHENGDU PULUOMI NEW TECHNOLOGY Co Ltd
Priority date: 2007-06-08
Filing date: 2007-06-08
Publication date: 2008-05-14
Anticipated expiration: 2017-06-08

Abstract

The utility model provides an accurate centring tripod mounting which can keep the height of surveying and mapping instrument to be a fixed value. The accurate centring tripod mounting comprises a tripod mounting body and two adjustment legs. A centring axis, a gradienter and a pedestal are arranged at the tripod mounting body. The centring axis and the two adjustment legs compose three supporting legs. The pedestal and the centring axis are respectively arranged in upper and lower two sides of the tripod mounting body. The distance between the pedestal and bottom of centring axis is a fixed value. Because the distance between the pedestal of the utility model used for putting surveying and mapping instruments and the bottom of centring axis is a fixed value, the distance between the surveying and mapping instruments and circular cone vertex in the centring axis bottom is also a fixed value. The instrument height never changes no matter how to change measuring point on the ground. Measurement error generated by manual measuring is avoided, thereby being more particularly suitable to the projects with higher requirements to measuring accuracy like high speed railway construction, etc.

Description

Accurate centering tripod

Technical field

The utility model relates to a kind of accurate centering apparatus for leveling of laying instrument of surveying and mapping, particularly relates to a kind of accurate centering tripod.

Background technology

Use instrument of surveying and mapping (comprising total powerstation, transit, spirit-leveling instrument, robot measurement, GPS etc.) before measuring, for convenience of the personnel operation instrument, instrument stand need be located at and carry out the centering leveling on the tripod with certain altitude, the purpose of centering is to allow the measured on same pedal line of the center of instrument of surveying and mapping and ground, the purpose of leveling is the vertical pivot vertical that makes instrument of surveying and mapping, the horizontal dial level.After the centering leveling is finished, need the artificial instruments such as steel tape or tape measure that use to measure the height of centre to the measured point, ground, so just the coordinate figure that instrument can be recorded is converted into the true coordinate value of ground measured point, because the own precision of survey instrument such as steel tape or tape measure are limited and be manual read's number, so the common tripod of this use sets up the method that instrument measures and can only be applied in the not high measurement of accuracy requirement.In order further to improve the precision of measuring, people adopt and to build cement observation pier set up instrument of surveying and mapping and measure on measured point, replace traditional tripod with fixing clump, nonetheless, the height of instrument of surveying and mapping still is not a definite value, because instrument of surveying and mapping all needed to flatten by three adjustment spirals of self pedestal before each the measurement, though instrument of surveying and mapping itself has a fixing height during fabrication, but whenever move instrument of surveying and mapping one time, height after its leveling all is difficult to be consistent, and highly still needs manually to measure.

The utility model content

Technical problem to be solved in the utility model provides and a kind ofly can guarantee that the height of instrument of surveying and mapping is the accurate centering tripod of a definite value.

The technical scheme that the utility model technical solution problem is adopted is: accurate centering tripod, comprise tripod main body and two adjustment pin, on described tripod main body, be equipped with axis, level meter and pedestal, described to axis and three feets of two adjustment pin formations, described pedestal is definite value with the upper and lower surface that axis is installed on the tripod main body respectively, described pedestal to the distance to the axis bottom.

The beneficial effects of the utility model are: is definite value owing to place the pedestal of instrument of surveying and mapping to the distance to the axis bottom, therefore, instrument of surveying and mapping also will be a fixed value to the distance to cone summit, axis bottom, change ground measurement point in any case, the height of instrument can not change, and has saved the measuring error of manually measuring and bringing.Be specially adapted to build high-speed railway etc. and the precision of measuring had the engineering of high request.

Description of drawings

Fig. 1 is the front view of accurate centering tripod.

Fig. 2 is the vertical view of accurate centering tripod.

Fig. 3 is the partial sectional view of the side view of accurate centering tripod.

Fig. 4 is the A-A cut-open view of Fig. 1.

Embodiment

As Fig. 1, Fig. 2 and shown in Figure 3, accurate centering tripod of the present utility model is made up of pedestal 74 and the tripod main body 75 axis 71, two being adjusted pin 72, long tube bubble 73, place instrument of surveying and mapping, axis 71, two are adjusted pin 72, long tube bubble 73 and pedestal 74 and all be installed on the tripod main body 75, described three feets to axis 71 and adjustment pin 72 formations accurate centering tripod of the present utility model, described pedestal 74 and the upper and lower surface that axis 71 is installed on tripod main body 75 respectively.

Bottom to axis 71 is cone, and the summit of cone overlaps with shaft centre line to axis 71, is used to aim at ground known point during measurement, and axis 71 and tripod main body 75 are closely linked together.The center of the pedestal 74 of placement instrument of surveying and mapping overlaps with the shaft centre line to axis 71, and described pedestal 74 adopts the metal column 78 of three level altitudes closely to link to each other with tripod main body 75.

In order to make the vertical pivot vertical of instrument of surveying and mapping, the horizontal dial level, the utility model has adopted to be adjusted pin 72 and replaces three of the traditional pedestal adjustment spirals that are used to flatten instrument of surveying and mapping, adjusts pin 72 and is made up of coarse adjustment knob 76 and tangent screw 77, as shown in Figure 4.In use, adopt coarse adjustment knob 76 to carry out coarse adjustment earlier, when the bubble in two long tube bubbles 73 during near the middle part, using tangent screw 77 instead accurately adjusts, accurately after the leveling, the vertical pivot of instrument of surveying and mapping, to the shaft centre line of axis 71, cone summit, the ground survey point of axis 71 bottoms all is on the pedal line.

Said base 74 has been to save three adjustment spirals that are used to flatten instrument of surveying and mapping with the difference of traditional pedestal, and use the metal column 78 of level altitude closely to link to each other with tripod main body 75, thereby the height of pedestal 74 is definite values, and the height of axis 71 is also fixed, therefore, pedestal 74 also is a definite value to the distance to cone summit, axis 71 bottom, because instrument of surveying and mapping itself has a fixing height, so, instrument of surveying and mapping also will be a fixed value to the distance to cone summit, axis 71 bottom, change ground measurement point in any case, the height of instrument can not make because having adjusted three adjustment spirals that are used to flatten and highly change, and has saved the measuring error of manually measuring and bringing.

Of the present utility model to being welding between axis 71 and the tripod main body 75, also can be to adopt web member to be installed together, as long as to being close installation between axis 71 and the tripod main body 75, and can not produce relatively move just passable; In addition, also can adopt other connected mode between pedestal 74 and the tripod main body 75, not relatively move and highly certain as long as can not produce between pedestal 74 and the tripod main body 75; Long tube bubble 73 also can adopt the level meter of other form, and these all belong to the scope of the utility model protection.

Claims

1. accurate centering tripod, comprise tripod main body (75) and two adjustment pin (72), it is characterized in that: on described tripod main body (75), be equipped with axis (71), level meter and pedestal (74), described to axis (71) and three feets of two adjustment pin (72) formation, described pedestal (74) is definite value with the upper and lower surface that axis (71) is installed on tripod main body (75) respectively, described pedestal (74) to the distance to axis (71) bottom.

2. accurate centering tripod as claimed in claim 1 is characterized in that: described bottom to axis (71) is a cone.

3. accurate centering tripod as claimed in claim 2 is characterized in that: the center of described pedestal (74), to the shaft centre line of axis (71) and to the cone summit of axis (71) bottom on the same axis line.

4. accurate centering tripod as claimed in claim 1 is characterized in that: described level meter is long tube bubble (73)

5. accurate centering tripod as claimed in claim 1 is characterized in that: described adjustment pin (72) is made of coarse adjustment knob (76) and tangent screw (77).

6. accurate centering tripod as claimed in claim 1 is characterized in that: described pedestal (74) is installed on the tripod main body (75) by metal column (78).