CN106969757B - A kind of automatic leveling tripod - Google Patents
A kind of automatic leveling tripod Download PDFInfo
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- CN106969757B CN106969757B CN201710226663.9A CN201710226663A CN106969757B CN 106969757 B CN106969757 B CN 106969757B CN 201710226663 A CN201710226663 A CN 201710226663A CN 106969757 B CN106969757 B CN 106969757B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/30—Supports specially adapted for an instrument; Supports specially adapted for a set of instruments
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- Engineering & Computer Science (AREA)
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Abstract
The present invention relates to engineering surveying instrument fields, and in particular to a kind of automatic leveling tripod, comprising: triangular leg, the rack platform and levelling mechanism, locking mechanism and instrument erecting bed that three foot supporting leg upper ends are arranged in；An adjusting hole up and down is provided in the middle part of the rack platform, levelling mechanism is hung on rack platform by adjusting hole vertical, make the installation site automatic leveling of instrument erecting bed, then by locking mechanism by the sealed fixation of levelling mechanism, the horizontality of instrument is maintained from structure.Using the above scheme, automatic leveling tripod apparatus provided by the invention can greatly simplify the leveling process of measuring instrument, reduce the operating time adjusted repeatedly and energy consumption, easy to operate, quick, improve leveling precision and efficiency.
Description
Technical field
The present invention relates to engineering surveying instrument fields, and in particular to a kind of automatic leveling tripod.
Background technique
Modern society is increasingly stringent to the quality requirement of engineering construction, and the precision of the quality and design and construction of engineering is direct
Correlation, and accurately design and on the basis of construction must be set up accurate engineering survey.Common instrument master in engineering survey
Have level, theodolite, total station etc., function is different, but no matter which kind of instrument, required one when in use
Stable support device --- tripod.Traditional tripod due to its structure is simple, the good characteristics of supporting & stablizing and pass use
So far, but only drawback is that, typical tripod is needed before use, Levelling operation is troublesome, time-consuming by repeatedly to tripod
Three support legs and instrument on micromatic setting leveled, just the bubble on instrument can be made placed in the middle, reach measurement
The requirement that instrument is accurately placed, extremely consumes personal energy when adjustment, and precision of its leveling is more or by operating
The experience of person determines.Entire leveling process accuracy is difficult to control, troublesome in poeration, takes a long time, seriously affects engineering survey
Precision and efficiency.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of automatic leveling tripod, the tune of measuring instrument can greatly be simplified
Flat process reduces the operating time adjusted repeatedly and energy consumption, easy to operate, quick, improves leveling precision and efficiency.
A kind of automatic leveling tripod including with ground face contact and three height-adjustable foot supporting legs, and is arranged three
The rack platform of foot supporting leg upper end, which is characterized in that further include: levelling mechanism, locking mechanism and instrument erecting bed；The leveling
Mechanism is one using plumb line as the axisymmetric body of symmetrical centre, includes: the support stick of vertical setting, is horizontally set on support stick top
The support platform of the truncated cone-shaped in portion, be arranged in support stick bottom spherical irony weight body, and be positioned close to the branch
Support the spherical rotary shaft body on the support stick of platform；An adjusting hole up and down is provided in the middle part of the rack platform,
The lower part of the adjusting hole is arranged to the concave spherical surface to match with the lower half portion of the rotary shaft body；The levelling mechanism is by turning
The cooperation of axis body and the adjusting hole is rotatably hung on rack platform, and levelling mechanism is made to remain vertical；The lock
Position mechanism is detachably arranged on the three feet supporting leg, comprising: electromagnetic adsorption plate and three are evenly distributed on electromagnetic adsorption
Fixed feet on edges of boards edge；Three fixed feet correspondences snap fitted on three foot supporting legs, and electromagnetic adsorption plate is transversely fixed to institute
It states on three foot supporting legs below levelling mechanism, the electromagnetic adsorption plate adsorbs the weight body after being powered with the fixation leveling machine
Structure；The upper surface of the instrument erecting bed is equipped with the fixed mechanism of retainer instrument, and card is arranged on the lower surface of instrument erecting bed
Foot；The upper surface of the support platform sets the bayonet to match with the card base, by the cooperation of the bayonet and card base, by instrument
Device erecting bed is horizontally mounted to the top of support platform.
To be stablized after standing by three foot supporting legs, shape is the levelling mechanism of axisymmetric body under the action of centrifugal force, with
Centered on spherical rotary shaft body, it is automatically adjusted to vertical state, keeps the upper surface holding of support platform horizontal；At this point, lock-bit machine
The electromagnetic adsorption plate of structure, which is powered, generates magnetic force, adsorbs weight body so that entire levelling mechanism to be locked in current vertical state, from
The horizontality of support platform is maintained in structure；The instrument erecting bed for being equipped with instrument is finally snapped fitted into the upper of support platform
Portion directly makes instrument be in the higher horizontality of precision, greatly simplifies the leveling process of measuring instrument, and reduction adjusts repeatedly
Operating time and energy consumption, leveling work that is simple, quick, being efficiently completed instrument.
Further, the length of above-mentioned support stick is adjustable, comprising: upper tube body and to be actively plugged in upper tube intracorporal flexible
Bar；The top of the upper tube body connects the rotary shaft body, and the telescopic hole coaxial with upper tube body, upper tube body is arranged in the lower part of upper tube body
Lower end one middle part be removably set offer end cap with the telescopic hole coaxial through-hole；The top of the telescopic rod be with
The coaxial slide mass of the telescopic hole, the lower end of telescopic rod are that diameter is less than the slide mass and the body of rod coaxial with slide mass；
The slide mass set is inserted in the telescopic hole, and the through-hole that the body of rod passes through on the end cap is projected into the lower part of upper tube body, and
A spring is arranged on the body of rod between the slide mass and end cap；The lower end of the body of rod is removable by screw thread and the weight body
The connection unloaded.Keep the length of support stick adjustable by above structure, adapts to three foot supporting legs under different opening and height condition, weight
Hammer body can be contacted smoothly with electromagnetic adsorption plate and firmly be adsorbed by it, achieve the effect that level lock-bit.Meanwhile weight
Body is connected through a screw thread with support stick, can at any time be split weight body and support stick, convenient to dismantle or assemble if necessary leveling
Mechanism, using more convenient.
Further, above-mentioned slide mass is in long strip, and is less than the dumb-bell shape at both ends for interlude diameter, guarantees telescopic rod
While coaxially guiding in telescopic hole, friction area is reduced to reduce frictional force.
Further, above-mentioned electromagnetic adsorption plate includes: electromagnetism pole plate and the setting that electromagnetic adsorption plate upper surface is arranged in
Battery in electromagnetic adsorption plate lower part, the electromagnetism pole plate is electrically connected with battery, and is arranged one between electromagnetism pole plate and battery
A switch generates magnetic force or power-off demagnetization by the energization of the switch control electromagnetism pole plate.
Further, above-mentioned switch is remote control switch, and by a hand-held remote control control, it is powered or powers off,
It avoids external force intervention from having an impact the leveling state of three foot supporting legs, further ensures the precision of leveling.
Further, above-mentioned fixed feet is fixed by the way that the anchor ear of its outer end is arranged in three foot supporting legs, and the anchor ear includes:
Two holding bodies of symmetrical setting, two described one end for holding body tightly and fixed feet are hinged, the pairing of two holding bodies
A hasp is arranged in portion；The movable end and fixing end of the hasp are separately fixed on a holding body, pass through the movable end
And the combination of fixing end with separate, so that anchor ear closure is held the three feet supporting leg tightly, or open anchor ear and unclamp described three
Foot supporting leg.
Further, above-mentioned holding body includes the hinged hold bar of multistage；The design of multi-segment structure, when being closed anchor ear
Shape can more be matched with the shape of three foot supporting legs, guarantee the solid and reliable of obvolvent.
Further, the top of the adjusting hole is provided with counter sink, and a gland, institute are arranged in the counter sink
The top for stating gland is provided with the convex edge extended horizontally outward, and is hung and be sitting on the rack platform by the convex edge, described
The lower part of gland is inserted into counter sink, and the lower surface of gland be arranged to match with the top half of the rotary shaft body it is recessed
Spherical surface limits leveling machine by the post-receiving chamber to match with the rotary shaft body that cooperatively forms of the gland and adjusting hole
Structure moves up and down.
Further, it is provided with rotatable briquetting on the rack platform on the outside of above-mentioned gland, rotates the briquetting and compresses
The gland is fixed or unclamped, guarantees the reliability to levelling mechanism axial limiting, and easy to disassemble.
Further, above-mentioned bayonet is the square shrinkage pool that the support platform upper surface middle part is arranged in, the card base
The medium position of instrument erecting bed lower surface, and the square protrusions to match with the square shrinkage pool are set；
By the cooperation of square shrinkage pool and boss, the installation of instrument is simpler, quick.
In conclusion automatic leveling tripod provided by the invention, can greatly simplify the leveling process of measuring instrument,
The operating time adjusted repeatedly and energy consumption are reduced, it is easy to operate, quick, improve leveling precision and efficiency.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is structure half-section diagram of the invention；
Fig. 3 is the structural profile illustration of levelling mechanism of the present invention；
Fig. 4 is the structural schematic diagram of locking mechanism of the present invention；
Fig. 5 is the structural schematic diagram of anchor ear of the present invention.
Appended drawing reference: tri- foot supporting leg of 1-；2- rack platform；21- adjusting hole；22- gland；23- post-receiving chamber；24- briquetting；3-
Levelling mechanism；31- support stick；311- upper tube body；3111- telescopic hole；312- telescopic rod；3121- slide mass；The 3122- body of rod；
313- end cap；314- spring；32- support platform；321- bayonet；33- weight body；34- rotary shaft body；4- locking mechanism；41- electromagnetism
Adsorption plate；411- electromagnetism pole plate；412- switch；413- remote controler；42- fixed feet；43- anchor ear；431- holds body tightly；4311- is embraced
Tight item；432- hasp；4321- movable end；4322- fixing end；5- instrument erecting bed；51- card base
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.
As shown in Figures 1 to 5, a kind of automatic leveling tripod provided in an embodiment of the present invention, comprising: three foot supporting legs 1, branch
Body panel 2, levelling mechanism 3, locking mechanism 4 and instrument erecting bed 5.Three foot supporting legs 1 include three and are uniformly distributed and height and angle
The supporting leg that can be adjusted is spent, and realizes the effect for stablizing support by supporting leg and ground face contact.Rack platform 2 is arranged in three feet
The upper end of supporting leg 1, the middle part is provided with an adjusting holes 21 up and down, to install levelling mechanism 3.
Referring to Fig. 3, levelling mechanism 3 is one using plumb line as the axisymmetric body of symmetrical centre, comprising: the branch of vertical setting
Support stick 31, be horizontally set on the top of support stick 31 truncated cone-shaped support platform 32, the spherical iron of 31 bottom of support stick is set
The weight body 33 of matter, and the spherical rotary shaft body 34 being positioned close on the support stick 31 of 32 position of support platform.To adapt to
The different opening and height condition of three foot supporting legs 1, the length of support stick 31 is adjustable.Support stick 31 is mainly by a upper tube body 311
It is formed with a telescopic rod being actively plugged in upper tube body 311 312；The top of the upper tube body 311 connects rotary shaft body 34, upper tube
The lower part of body 311 is arranged the telescopic hole 3111 coaxial with upper tube body 311, and is spirally connected one middle part in the lower end of upper tube body 311
Offer the end cap 313 of the through-hole coaxial with the telescopic hole 3111.The top of telescopic rod 312 is coaxial with the telescopic hole 3111
Slide mass 3121, and the slide mass 3121 is in long strip, and section diameter is less than both ends formation dumb-bell shape among it, guarantees telescopic rod
312 in telescopic hole 3111 while be coaxially oriented to, and reduces friction area to reduce frictional force；The lower end of telescopic rod 312 is straight
Diameter is less than slide mass 3121 and the body of rod 3122 coaxial with slide mass 3121.The set of 3121 precision-fit of slide mass is inserted in telescopic hole
In 3111, the through-hole that the body of rod 3122 passes through on end cap 313 is projected into the lower part of upper tube body 311, and in slide mass 3121 and end cap
It is arranged a spring 314 on the body of rod 3122 between 313, so that support stick 31 has retractility, guarantees the difference in three foot supporting legs 1
Under aperture and height condition, weight body can be contacted smoothly with electromagnetic adsorption plate and firmly be adsorbed by it, increase lock-bit
Reliability.The lower end of the body of rod 3122 is removably connect by screw thread with weight body 33, can be at any time by weight body and support stick
It splits, it is convenient to dismantle or assemble if necessary levelling mechanism, using more convenient.
Referring to fig. 2, after three foot supporting legs 1 expansion placement is stablized, the cooperation by adjusting hole 21 and rotary shaft body 34 will level machine
Structure 3 is hung on rack platform 2, and levelling mechanism 3 is made to remain vertical.The lower part of adjusting hole 21 is arranged to and rotary shaft body 34
The top of the concave spherical surface that lower half portion matches, adjusting hole 21 is equipped with counter sink, and a gland 22, the pressure are arranged in counter sink
The top of lid 22 is provided with the convex edge extended horizontally outward, and is hung and be sitting on rack platform 2 by the convex edge；The lower part of gland 22
It is inserted into the counter sink, and the lower surface of gland 22 is arranged to the concave spherical surface to match with the top half of the rotary shaft body 34；
By the post-receiving chamber to match with rotary shaft body 34 23 that cooperatively forms of gland 22 and adjusting hole 21, levelling mechanism 3 is by being somebody's turn to do
The activity cooperation of rotary shaft body 34 and post-receiving chamber 23, can universal rotational snap fitted on rack platform 2, the outer surface of rotary shaft body 34 with
And the inner surface of post-receiving chamber 23 passes through finishing and forms the minimum shiny surface of surface roughness, and adds in the mating surface of the two
Lubricating oil is infused to form lubricating oil film, makes frictional force very little at the cooperation of the two, rotary shaft body 34 can flexibly turn in post-receiving chamber 23
It is dynamic, so that levelling mechanism 3 is remained vertical under gravity.Meanwhile to guarantee to the reliable of 3 axial limiting of levelling mechanism
Property, multiple rotatable briquettings 24 are provided on the rack platform 2 in the outside of gland 22, are rotated the briquetting 24 and are fixed or pine
Gland 22 is opened, it is easy to disassemble.
As shown in Figure 4 and Figure 5, locking mechanism 4 includes: that electromagnetic adsorption plate 41 and three are evenly distributed on electromagnetic adsorption plate
Fixed feet 42 on 41 edges, three fixed feets 42 respectively pass through the three of an anchor ear 43 that its outer end is arranged in and three foot supporting legs 1
A supporting leg is fixed, and is fixed on electromagnetic adsorption plate 41 on three foot supporting legs 1 in the state of general horizontal in the lower section of levelling mechanism 3,
Play the role of stablizing three foot supporting legs 1 simultaneously.Referring to Fig. 5, anchor ear 43 is mainly by two holding bodies 431 of symmetrical setting
Composition is held body 431 tightly and is hingedly formed by multistage hold bar 4311, and shape when anchor ear 43 being enable to be closed is outer with three foot supporting legs 1
Shape more matches, and guarantees the solid and reliable of obvolvent；One end and the fixed feet 42 for holding body 431 tightly are hinged, the pairing of two holding bodies 431
A hasp 432 is arranged in portion, and the movable end 4321 and fixing end 4322 of the hasp 432 are separately fixed on a holding body 431:
Combination by movable end 4321 and fixing end 4322 with separate, so that the closure of anchor ear 43 is held three foot supporting legs 1 tightly to fix lock-bit machine
Structure 4, or open anchor ear 43 and unclamp three foot supporting legs 1, locking mechanism 4 is unloaded with easy disassembly.
Referring to fig. 4, electromagnetic adsorption plate 41 includes: that the electromagnetism pole plate 411 of 41 upper surface of electromagnetic adsorption plate is arranged in and sets
The battery in 41 lower part of electromagnetic adsorption plate is set, electromagnetism pole plate 411 is electrically connected with battery, and between electromagnetism pole plate 411 and battery,
The energization that a control electromagnetism pole plate 411 is arranged generates magnetic force or powers off the switch 412 of demagnetization；To avoid external force intervention to three
The leveling state of foot supporting leg 1 has an impact, and to further ensure the precision of leveling, which is remote control switch, leads to
It crosses a hand-held remote controler 413 and is remotely controlled its energization or power-off.
To be stablized after standing by three foot supporting legs 1, shape is the levelling mechanism 3 of axisymmetric body under the action of centrifugal force,
Centered on spherical rotary shaft body 34, it is automatically adjusted to vertical state, keeps the upper surface holding of support platform 32 horizontal；At this point,
Control locking mechanism 4 electromagnetic adsorption plate 41 be powered generate magnetic force, absorption weight body 33 so that its automatically adjust length after with electricity
Magnetic attached plate 41 contacts, and entire levelling mechanism 3 is locked in current vertical state, and the water of support platform 32 is maintained from structure
Level state obtains the higher instrument of precision and places basis.
Later, by instrument by the fixed mechanism for the retainer instrument being arranged on 5 upper surface of instrument erecting bed, by instrument stabilizer
It is installed on instrument erecting bed 5, is then aligned with the bayonet 321 of the square shrinkage pool shape of 32 upper surface middle part of support platform setting,
Card base 51 by the square protrusions shape to match with the bayonet 321 being arranged on 5 lower surface of instrument erecting bed is easily inserted
It is attached in support platform 32；Because instrument erecting bed 5 is the parallel column of upper and lower surfaces, kept in 32 upper surface of support platform
In the case where level, instrument keeps horizontal naturally, without carrying out cumbersome Levelling operation again.
In conclusion using the above scheme, automatic leveling tripod provided by the invention can greatly simplify measuring instrument
The leveling process of device reduces the operating time adjusted repeatedly and energy consumption, easy to operate, quick, improves leveling precision and effect
Rate.
It should be noted that preferred embodiment above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that: it is still
Can modify to technical solution documented by previous embodiment, or some or all of the technical features are carried out etc.
With replacement；And these are modified or replaceed, technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
Range should all cover within the scope of the claims and the description of the invention.
Claims (9)
1. a kind of automatic leveling tripod, including with ground face contact and three height-adjustable foot supporting legs, and it is arranged in three feet
The rack platform of supporting leg upper end, which is characterized in that further include: levelling mechanism, locking mechanism and instrument erecting bed；
The levelling mechanism is one using plumb line as the axisymmetric body of symmetrical centre, includes: the support stick of vertical setting, level sets
Set the weight body of the support platform of the truncated cone-shaped at the top of support stick, the spherical irony that support stick bottom is set, and setting
Spherical rotary shaft body on the support stick close to the support platform；
Be provided with an adjusting hole up and down in the middle part of the rack platform, the lower part of the adjusting hole be arranged to it is described
The concave spherical surface that the lower half portion of rotary shaft body matches；The levelling mechanism can be rotated by the cooperation of rotary shaft body and the adjusting hole
Be hung on rack platform, so that levelling mechanism is remained vertical；
The locking mechanism is detachably arranged on the three feet supporting leg, comprising: electromagnetic adsorption plate and three are uniformly distributed
Fixed feet on electromagnetic adsorption edges of boards edge；Three fixed feet correspondences snap fitted on three foot supporting legs, and electromagnetic adsorption plate is horizontal
To on three foot supporting legs being fixed to below the levelling mechanism, the electromagnetic adsorption plate adsorbs the weight body after being powered with fixation
The levelling mechanism；
The upper surface of the instrument erecting bed is equipped with the fixed mechanism of retainer instrument, and card is arranged on the lower surface of instrument erecting bed
Foot；The upper surface of the support platform sets the bayonet to match with the card base, by the cooperation of the bayonet and card base, by instrument
Device erecting bed is horizontally mounted to the top of support platform；
The length of the support stick is adjustable, comprising: upper tube body and is actively plugged in the intracorporal telescopic rod of upper tube；
The top of the upper tube body connects the rotary shaft body, and the telescopic hole coaxial with upper tube body, upper tube is arranged in the lower part of upper tube body
The end cap offered in the middle part of in the of one with the telescopic hole coaxial through-hole is removably arranged in the lower end of body；The top of the telescopic rod is
The coaxial slide mass with the telescopic hole, the lower end of telescopic rod are that diameter is less than the slide mass and the bar coaxial with slide mass
Body；The slide mass set is inserted in the telescopic hole, and the through-hole that the body of rod passes through on the end cap is projected into the lower part of upper tube body, and
A spring is arranged on the body of rod between the slide mass and end cap；It the lower end of the body of rod can by screw thread and the weight body
The connection of disassembly.
2. automatic leveling tripod according to claim 1, which is characterized in that
The slide mass is in long strip, and is less than the dumb-bell shape at both ends for interlude diameter.
3. automatic leveling tripod according to claim 1, which is characterized in that
The electromagnetic adsorption plate includes: that the electromagnetism pole plate of electromagnetic adsorption plate upper surface is arranged in and is arranged under electromagnetic adsorption plate
The battery in portion, the electromagnetism pole plate are electrically connected with battery, and a switch is arranged between electromagnetism pole plate and battery, by described
The energization of switch control electromagnetism pole plate generates magnetic force or power-off demagnetization.
4. automatic leveling tripod according to claim 3, which is characterized in that
The switch is that remote control switchs, and by a hand-held remote control control, it is powered or powers off.
5. automatic leveling tripod according to claim 1, which is characterized in that
The fixed feet is fixed by the way that the anchor ear of its outer end is arranged in three foot supporting legs, and the anchor ear includes: symmetrical sets
The two holding bodies set, two described one end for holding body tightly and fixed feet are hinged, and the pairing portion of two holding bodies is arranged one and takes
Button；The movable end and fixing end of the hasp are separately fixed on a holding body, pass through the knot of the movable end and fixing end
It closes and separates, so that the anchor ear closure is held the three feet supporting leg tightly, or open anchor ear and unclamp the three feet supporting leg.
6. automatic leveling tripod according to claim 5, which is characterized in that
The holding body includes the hinged hold bar of multistage.
7. automatic leveling tripod according to claim 1, which is characterized in that
The top of the adjusting hole is provided with counter sink, and a gland, the top of the gland are arranged in the counter sink
It is provided with the convex edge extended horizontally outward, and is hung and is sitting on the rack platform by the convex edge, the lower part of the gland is inserted
In counter sink, and the lower surface of gland is arranged to the concave spherical surface to match with the top half of the rotary shaft body, passes through institute
The post-receiving chamber to match with the rotary shaft body that cooperatively forms of gland and adjusting hole is stated, limitation levelling mechanism, which is done, to be moved down
It is dynamic.
8. automatic leveling tripod according to claim 7, which is characterized in that
It is provided with rotatable briquetting on rack platform on the outside of the gland, rotates the briquetting and is fixed or unclamps institute
State gland.
9. automatic leveling tripod according to claim 1, which is characterized in that
The bayonet is the square shrinkage pool that the support platform upper surface middle part is arranged in, and the card base is arranged in the instrument
The medium position of erecting bed lower surface, and the square protrusions to match with the square shrinkage pool.
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| CN201710226663.9A CN106969757B (en) | 2017-04-09 | 2017-04-09 | A kind of automatic leveling tripod |
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| CN201710226663.9A CN106969757B (en) | 2017-04-09 | 2017-04-09 | A kind of automatic leveling tripod |
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| CN106969757B true CN106969757B (en) | 2019-07-05 |
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| US3776496A (en) * | 1972-01-26 | 1973-12-04 | C Reed | Instrument mount |
| KR101356754B1 (en) * | 2013-08-19 | 2014-02-04 | 에스제이공간정보(주) | Tripod fixing apparatus for geodetic surveying instrument |
| CN103913153A (en) * | 2014-04-30 | 2014-07-09 | 国家电网公司 | Automatic leveling laser measurement instrument |
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| CN106969757A (en) | 2017-07-21 |
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