CN105318903B - A-frame - Google Patents
A-frame Download PDFInfo
- Publication number
- CN105318903B CN105318903B CN201510919891.5A CN201510919891A CN105318903B CN 105318903 B CN105318903 B CN 105318903B CN 201510919891 A CN201510919891 A CN 201510919891A CN 105318903 B CN105318903 B CN 105318903B
- Authority
- CN
- China
- Prior art keywords
- leg
- gear
- cutting ferrule
- rack
- upper leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Hinges (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
The present invention provides a kind of A-frame, including main platform and three upper leg, three lower legs, three upper legs are hinged with main platform, and upper leg is slidably connected with lower leg, complete preliminary locking except being provided with the first cutting ferrule between the two, realize coarse adjustment, rack also is fixedly installed in lower leg, the second cutting ferrule is set with upper leg, the second cutting ferrule sets gear, wheel and rack is engaged, and realizes fine setting.By coarse adjustment and accurate adjustment respectively to three upper legs and lower leg collapsing length, realize and the levelness of A-frame is precisely adjusted, and it is simple in construction, it is with low cost, it is easy to operate.
Description
Technical field
The present invention relates to survey engineering field, more particularly to a kind of measuring instrument support.
Background technology
Measuring instrument equipment keeps the stabilization of a period of time after need to having been set up when using on a point, when setting up instrument
It is required for by " centering, leveling " the two steps, thick put down is to need to complete by telescopic foot stool leg in the link of leveling
Circle level(l)ing bubble on instrument is placed in the middle.
Existing measuring instrument A-frame has two kinds, and one kind is slidingtype Retractive leg A-frame, and another is
The overall telescopic A-frame of gear teeth meshing.Slip is only existed between the upper leg of slidingtype Retractive leg tripod and lower leg to match somebody with somebody
Close and locking device, it is difficult to realize high-precision levelness regulation；And the upper leg of the telescopic A-frame of overall gear teeth meshing
Overall gear teeth transmission coordinates between portion and lower leg, and the flexible of lower leg can only be by adjusting first gear, and flexible stroke is longer
When waste time and energy, and for save contraction time, increase telescopic step be commonly designed away from, the tooth pitch of its first gear and rack it is larger,
It is difficult to the requirement that levelness is adjusted in high precision.
The content of the invention
The purpose of the present invention uses three to provide a measuring instrument that is simple in construction and can realizing high precisely levelness regulation
Angle support.
The A-frame that the present invention is provided includes：Upper mounting plate, three upper legs and three lower legs；Upper mounting plate with it is each on
Leg is hinged, and each upper leg is slidably matched with a lower leg；Upper leg includes the first cutting ferrule, and the first cutting ferrule is fixed on leg
Subordinate end；Upper leg also includes the first bolt and the first cutting ferrule screw thread coordinates, and the end of the first bolt is selectively pressed on
In upper leg；It is characterized in that：A-frame also includes：Second cutting ferrule, the second cutting ferrule is slidably matched with upper leg；Second cutting ferrule
On be provided with first gear and the second cutting ferrule and rotate and be connected；Second bolt, the second bolt and the second cutting ferrule screw thread coordinate, and second
The end of bolt is selectively pressed on leg；The top of lower leg is provided with rack, and rack is nibbled with first gear transmission
Close.
From such scheme, due to being slidably matched between upper leg and lower leg while being provided with the first bolt compresses lock
Tightly, the first bolt increases certain upper stiction sufficiently large between leg and lower leg of thrust offer and goes to overcome gravity and prevent
Only both are relative slides；Original the second cutting ferrule slided relative to upper leg of the second bolt locking is reused, the second cutting ferrule is relative
It is static in upper leg, and the rack of first gear and the lower leg set in the second cutting ferrule coordinates, give the on the second cutting ferrule
One gear driving source, is driven by first gear, and lower leg produces microdisplacement.By to the thick of three upper legs and lower leg
Mediation accurate adjustment, realizes and the levelness of A-frame is precisely adjusted, and simple in construction, easy to operate.
Further scheme is that work box is provided with the second cutting ferrule, and first gear is located inside work box, and rack is optional
Put in selecting or through work box.
Therefore, because first gear and rack are in work box, extraneous unfavorable factor can be prevented to the first tooth
Wheel and rack cause the lost of life even consequence such as unrepairable damage, and can store lubricating oil, it is ensured that the smoothness that the gear teeth coordinate
Degree.
Further scheme is also to include a second gear in working box and be connected with work box rotation, second gear
Engage simultaneously between first gear and rack and with both first gear, rack.
Therefore, second gear is set in work box as the drive between first gear, rack-driving chain, can
Lower the manufacture schedule requirement to first gear, while the big I for changing second gear produces different micro-shifting unit quantities, realize
The regulation of different accuracy requirement.
Further scheme is that upper leg includes a contiguous block and two root architecture identical long profiles, two long profiles
Be fixedly connected between the both sides of the contiguous block bottom surface, two long profiles and form space, lower leg be located at two long profiles it
Between.
Further scheme is that rack is arranged in the centre position on the top of lower leg, and tooth surface of rack faces outwardly setting.
Therefore, because rack is located at medium position, the stress of lower leg is preferable, effectively extends A-frame
Service life；Because upper leg is two long profiles components, lower leg is exposed between two long profiles, and it is convenient that rack faces outer end
Observe rack service condition and cleaning maintenance.
Further scheme is that the adjusting knob of first gear is arranged at the outward surface of the second cutting ferrule.
Therefore, it is more convenient during regulation levelness in the outward surface that the second cutting ferrule is arranged at due to adjusting knob.
Further scheme is that the end of the second bolt presses on the side of leg.
Further scheme is that two long profiles of upper leg are timber.
Therefore, it is simple in construction because the major part of upper leg is made of timber, reduce cost and replace easy.
Further scheme is that lower leg is made using wood materials.
Therefore, lower leg is made up of wood materials, simple in construction, reduces cost and replaces easy.
Further scheme, which is that lower leg lower end is provided with, grabs lower margin, grabs lower margin and is made using metal material.
Therefore, because geological property is uncertain, setting grab lower margin and using metal material can effectively prevent geology because
Element wooden lower leg caused it is rotten it is rotten wait influence, and metal material grabs lower margin energy steady.
Brief description of the drawings
Fig. 1 is the structure chart of A-frame of the embodiment of the present invention；
Fig. 2 is the structure chart of leg in the embodiment of the present invention；
Fig. 3 is the partial enlarged drawing of leg in the embodiment of the present invention；
Simultaneously reference implementation below in conjunction with the accompanying drawings, the present invention is described in detail.
Embodiment
As shown in figure 1, Fig. 1 is the structure chart of the present embodiment A-frame；A-frame includes upper mounting plate 100 and three knots
The levelness such as level(l)ing bubble are provided with structure identical leg 200, upper mounting plate 100 and judge instrument, three legs 200 are to stretch
Shrinking structure, and three arrays of leg 200 are arranged in the lower section of upper mounting plate 100, and three legs 200 are hinged with upper mounting plate 100,
The level degree of upper mounting plate 100 is realized by adjusting the different outer swinging in three legs 200 and collapsing length.
As shown in Fig. 2 Fig. 2 is the structure chart of leg 200 in the present embodiment；Leg 200 includes upper leg 210 and lower leg
220；Upper leg 210 includes two long profiles 211, and long profiles 211 are wooden, and two long profiles 211 are fixedly installed in connection
On block 214, and two long profiles 211 are arranged parallel to；Two bottoms of long profiles 211 are provided with the first cutting ferrule 212, the first card
Set 212, which is coated in the middle of two long profiles 211, two long profiles 211, a clearance space, and lower leg 220 is blocked through first
The opening of set 212 simultaneously reaches the clearance space between two long profiles 211, and the first cutting ferrule 212 limits the lower part of leg 220
Freedom of movement, being slidably matched between leg 210 and lower leg 220 in formation.It is provided with the side of first cutting ferrule 212
The first bolt 213 coordinated with its screw thread；The coaxial knob being connected to of the first bolt 213 is twisted, the end of the first bolt 213 can be made
End presses on the side of leg 210, and certain elastic deformation occurs for the long profiles 211 of upper leg 210, and upper leg 210 is with
Leg 220 is converted into the state of compressing by being slidably matched, and stiction makes both geo-stationaries in certain field of load between the two.
It is set with outside upper leg 210 on the second cutting ferrule 230, the second cutting ferrule 230 and is provided with the second bolt 231, the second bolt
231 and the screw thread of the second cutting ferrule 230 coordinate, the external rotating of the second bolt 231 from the second cutting ferrule 230 puts in the second cutting ferrule 230
It is internal, it is possible on the side for being pressed on leg 210.When the second bolt 231 is not pressed on upper leg 210, second
Cutting ferrule 230 and upper leg 210 are mutually slidably matched；When the second bolt 231 is pressed on upper leg 210, the He of the second cutting ferrule 230
The upper geo-stationary of leg 210.
The top of wooden lower leg 220 is fixedly connected with the rack 221 arranged vertically, coordinates for being driven, lower leg 220
Lower section be provided with metal material grab lower margin 222.
As shown in figure 3, Fig. 3 is the partial enlarged drawing of leg 200；Work box 240 is provided with second cutting ferrule 230, is worked
First gear 232 is provided with case 240, first gear 232 and the body pivot of work box 240 coordinate, in hanging down for work box 240
Directly in the casing that second gear 233, second gear 233 and work box 240 are provided with another surface of the rotating shaft of first gear 232
It is rotatably assorted, and second gear 233 is engaged with the transmission of first gear 232；The upper and lower of work box 240 is provided with opening, supplies
Rack 221 is passed through.
The opening of rack 221 from work box 240 is passed in casing, and rack 221 is engaged with the transmission of second gear 233,
When second gear 233 is rotated, band carry-over bar 221 is slided up and down.First gear 232 it is coaxially connected adjusting knob 234, twisting
Adjusting knob 234 makes the synchronous axial system of first gear 232, is driven to by second gear 233 at rack 221, and rack 221 drives again
Lower leg 220 is moved up and down.
As shown in Figure 2 and Figure 3, due to first gear 232 by second gear 233 give the unit translational movement of rack 234 compared with
It is small, when the first cutting ferrule 212 is compressed by 213 pairs of upper legs 210 of the first bolt, make between leg 210 and lower leg 220
Producing certain quiet frictional force enables both to keep geo-stationary in the range of certain effect power, in temporary stabilization state.
When twisting adjusting knob 234, second gear 233 acts power by the flank of tooth to rack 221, when active force is supported
Disappear quiet frictional force between upper leg 210 and lower leg 220 when, upper leg 210 with occurring relative move again before lower leg 220
It is dynamic, realize fine setting.
Preferably, the rotating shaft of adjusting knob 234 and first gear 232 is arranged at the table outwardly of the second cutting ferrule 230
On face, adjusting knob 234 is located on the front of the second cutting ferrule 230, use when being easy to the user to adjust；Settable rack 221
Outwardly, the service condition for the rack 221 that convenient use person's observation is contacted with the external world is convenient to repair for flank of tooth side.
Finally it is emphasized that the foregoing is only the preferred embodiments of the present invention, it is not intended to limit the invention, it is right
For those skilled in the art, the present invention can have various change and change, within the spirit and principles of the invention,
Any modification, equivalent substitution and improvements done etc., should be included in the scope of the protection.
Claims (6)
1. A-frame, including：
Upper mounting plate, three upper legs and three lower legs；
The upper mounting plate is hinged with each upper leg, and each upper leg is slidably matched with a lower leg；
The upper leg includes the first cutting ferrule, and first cutting ferrule is fixed on the lower end of the upper leg；Also wrap the upper leg
The first bolt is included, first bolt coordinates with the first cutting ferrule screw thread, and the end of first bolt is selectively supported
It is pressed on the upper leg；
It is characterized in that：The A-frame also includes：
Second cutting ferrule, second cutting ferrule is slidably matched with the upper leg；First gear is provided with second cutting ferrule, institute
First gear is stated to be connected with second cutting ferrule rotation；
Second bolt, second bolt and the second cutting ferrule screw thread coordinate, and second bolt end selectively
Press on the upper leg；
The top of the lower leg is provided with rack, and the rack is engaged with first gear transmission；
Work box is provided with second cutting ferrule, the first gear is located inside the work box, and the rack may be selected
Ground is put in or through the work box；
Second gear, the second gear and institute are provided with the work box on the surface of the first gear rotating shaft
State work box rotate connection, the second gear be located between the first gear and the rack and simultaneously with first tooth
Wheel, rack engagement；
The rack is arranged in the upper middle position of the lower leg, and the teeth face outwards of the rack are set, and described first
The adjusting knob of gear is arranged at the outward surface of second cutting ferrule.
2. A-frame according to claim 1, it is characterised in that：
The upper leg includes a contiguous block and two root architecture identical long profiles, and two long profiles are fixedly connected on institute
State and space is formed between the both sides of contiguous block, two long profiles, the lower leg is located between two long profiles
In space.
3. A-frame according to claim 2, it is characterised in that：
The end of second bolt presses on the side of the upper leg.
4. A-frame according to claim 3, it is characterised in that：
Two long profiles of the upper leg are timber.
5. A-frame according to claim 4, it is characterised in that：
The lower leg is made using wood materials.
6. A-frame according to claim 5, it is characterised in that：
The lower leg lower end, which is provided with, grabs lower margin, and the lower margin of grabbing is made using metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510919891.5A CN105318903B (en) | 2015-12-10 | 2015-12-10 | A-frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510919891.5A CN105318903B (en) | 2015-12-10 | 2015-12-10 | A-frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105318903A CN105318903A (en) | 2016-02-10 |
| CN105318903B true CN105318903B (en) | 2017-09-29 |
Family
ID=55246796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510919891.5A Expired - Fee Related CN105318903B (en) | 2015-12-10 | 2015-12-10 | A-frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105318903B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106931952B (en) * | 2017-03-10 | 2019-03-19 | 浙江荣庆工程管理有限公司 | Total station triangular support bracket |
| CN108758271B (en) * | 2018-05-07 | 2020-04-28 | 海门市知舟工业设计有限公司 | Tripod support on equatorial telescope |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD143821A1 (en) * | 1979-07-02 | 1980-09-10 | Rudi Heinze | THREE-FUSED SCREW FOR MEASURING DEVICES |
| DE202005015263U1 (en) * | 2005-09-27 | 2006-01-05 | STABILA Messgeräte Gustav Ullrich GmbH | measuring arrangement |
| CN202066525U (en) * | 2011-04-29 | 2011-12-07 | 王海春 | Novel horse for measuring instrument |
| CN102865887B (en) * | 2012-09-11 | 2015-12-02 | 中国人民解放军总装备部军械技术研究所 | Photoelectric instrument full landform erection calibration apparatus |
| CN104295869B (en) * | 2014-08-15 | 2017-01-25 | 湖北三江航天万峰科技发展有限公司 | Tripod capable of being fast leveled |
| CN204269138U (en) * | 2014-12-22 | 2015-04-15 | 中国葛洲坝集团股份有限公司 | Surveying instrument tripod |
| CN104949704A (en) * | 2015-07-28 | 2015-09-30 | 安徽工程大学 | Tripod for measurement |
| CN204854782U (en) * | 2015-08-14 | 2015-12-09 | 郭晓波 | Novel hydrology prospecting RTK equipment fixed baseplate |
| CN205209520U (en) * | 2015-12-10 | 2016-05-04 | 中铁十九局集团第七工程有限公司 | Triangular support |
-
2015
- 2015-12-10 CN CN201510919891.5A patent/CN105318903B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105318903A (en) | 2016-02-10 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170929 Termination date: 20211210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |