CN205209520U - Triangular support - Google Patents
Triangular support Download PDFInfo
- Publication number
- CN205209520U CN205209520U CN201521027563.6U CN201521027563U CN205209520U CN 205209520 U CN205209520 U CN 205209520U CN 201521027563 U CN201521027563 U CN 201521027563U CN 205209520 U CN205209520 U CN 205209520U
- Authority
- CN
- China
- Prior art keywords
- cutting ferrule
- gear
- leg
- tooth bar
- bolt
- 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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- Component Parts Of Construction Machinery (AREA)
Abstract
The utility model provides a triangular support, including main platform and three shank, the three shank down gone up, three to go up the shank all articulated with main platform, goes up shank and the equal sliding connection of shank down, accomplishes preliminary locking except being provided with first cutting ferrule between the two, realizes the coarse adjusting, still at the fixed rack that sets up of shank down, and suit second cutting ferrule on last shank again, the second cutting ferrule sets up the gear, and wheel and rack meshes, and the realization is finely tuned. Through respectively to three coarse adjusting and accurate adjustment of going up shank and the flexible length of lower shank, realize the accurate regulation of triangular support's levelness, and simple structure, low cost, convenient operation.
Description
Technical field
The utility model relates to survey engineering field, particularly relates to a kind of surveying instrument support.
Background technology
The stable of rear maintenance a period of time need have been set up on a some during surveying instrument equipment use, all need by " centering, leveling " these two steps when setting up instrument, thick flat in the link of leveling is that the round leveling bubble that needs to be completed on instrument by telescopic foot stool leg is placed in the middle.
Existing surveying instrument A-frame has two kinds, and one is slidingtype Retractive leg A-frame, and another is the telescopic A-frame of overall tooth mesh.Only exist between the upper leg of slidingtype Retractive leg tripod and lower leg and be slidably matched and locking device, be difficult to realize high-precision levelness and regulate; And overall gear teeth transmission coordinates between the upper leg of the telescopic A-frame of overall tooth mesh with lower leg, the flexible of lower leg can only pass through adjustment first gear, waste time and energy when flexible stroke is longer, and for saving contraction time, increasing telescopic step distance, the tooth pitch of its first wheel and rack designs comparatively large usually, is difficult to the requirement realizing the adjustment of levelness high precision.
Utility model content
The purpose of this utility model is for providing a structure simple and can realizing the surveying instrument A-frame of high accurate levelness adjustment.
The A-frame that the utility model provides comprises: upper mounting plate, three upper legs and three lower legs; Upper mounting plate and each upper leg hinged, each upper leg and a lower leg are slidably matched; Upper leg comprises the first cutting ferrule, and the first cutting ferrule is fixed on leg lower end; Upper leg also comprises the first bolt and the first cutting ferrule threaded engagement, and the end of the first bolt selectively presses in upper leg; It is characterized in that: A-frame also comprises: the second cutting ferrule, the second cutting ferrule and upper leg are slidably matched; Second cutting ferrule is provided with the first gear and the second cutting ferrule is rotationally connected; Second bolt, the second bolt and the second cutting ferrule threaded engagement, and the end of the second bolt selectively presses on leg; The top of lower leg is provided with tooth bar, and tooth bar engages with the first gear drive.
From such scheme, be provided with the first bolt owing to being slidably matched between upper leg and lower leg simultaneously and compress locking, the first bolt increases certain snap-in force to be provided enough large stiction between leg and lower leg to go to overcome gravity and prevents both relative slidings; Re-use the second bolt-locking originally relative to the second cutting ferrule that upper leg slides, second cutting ferrule is static relative to upper leg, and the first gear arranged in the second cutting ferrule coordinates with the tooth bar of lower leg, give the first gear driving source on the second cutting ferrule, by the first gear drive, lower leg produces microdisplacement.By going up coarse adjustment and the accurate adjustment of legs and lower leg to three, realize precisely regulating the levelness of A-frame, and structure is simple, easy to operate.
Further scheme is, is provided with work box in the second cutting ferrule, and the first gear is positioned at work box inside, and tooth bar selectively puts in or passes work box.
Therefore, because the first gear and tooth bar are in work box, can prevent extraneous unfavorable factor from causing the lost of life even consequence such as unrepairable damage to the first gear and tooth bar, and lubricating oil can be stored, ensure the fluency that the gear teeth coordinate.
Further scheme is, also comprises second gear and work box is rotationally connected in working box, and the second gear is between the first wheel and rack and engage with the first gear, tooth bar simultaneously.
Therefore, second gear is set in work box as the power wheel between the first gear, rack-driving chain, can lower the manufacture schedule requirement to the first gear, the large I simultaneously changing the second gear produces differently micro-ly moves unit quantity, realizes the adjustment of different accuracy requirement.
Further scheme is, upper leg comprises the contiguous block long profiles identical with two root architectures, and two long profiles are fixedly connected on the both sides of described contiguous block bottom surface, forms space between two long profiles, and lower leg is between two long profiles.
Further scheme is, tooth bar is arranged in the centre position on the top of lower leg, and tooth surface of rack faces outer setting.
Therefore because tooth bar is positioned at medium position, the stress of lower leg is desirable, effectively extends the serviceable life of A-frame; Because upper leg is two long profiles assemblies, lower leg is positioned between two long profiles and exposes, and tooth bar faces outer end convenient observation tooth bar service condition and clean maintenance.
Further scheme is, the adjusting knob of the first gear is arranged at the outward surface of the second cutting ferrule.
Therefore, because adjusting knob is arranged in the outward surface of the second cutting ferrule, more convenient during adjustment levelness.
Further scheme is, the end of the second bolt presses on the side of leg.
Further scheme is, two long profiles of upper leg are timber.
Therefore because the major part timber of upper leg is made, structure is simple, reduces costs and replace easily.
Further scheme is, lower leg uses wood materials to make.
Therefore lower leg is that wood materials is made, structure is simple, reduces costs and replaces easily.
Further scheme is, lower leg lower end is provided with grabs lower margin, grabs lower margin and uses metal material to make.
Therefore, because geological property is uncertain, arrange grab lower margin and adopt metal material can effectively prevent geologic agent on wooden lower leg cause rotten rotten wait impact, and metal material grab lower margin energy steady.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the utility model embodiment A-frame;
Fig. 2 is the structural drawing of leg in the utility model embodiment;
Fig. 3 is the partial enlarged drawing of leg in the utility model embodiment;
Below in conjunction with accompanying drawing and reference example, the utility model is described in detail.
Embodiment
As shown in Figure 1, Fig. 1 is the structural drawing of the present embodiment A-frame; A-frame comprises upper mounting plate 100 leg 200 identical with three structures, upper mounting plate 100 is provided with the levelnesss such as leveling bubble and judges instrument, three legs 200 are Collapsible structure, and three leg 200 arranged in arrays are in the below of upper mounting plate 100, and three legs 200 are all hinged with upper mounting plate 100, realized the level degree of upper mounting plate 100 by the outer swinging that regulates three legs 200 different and collapsing length.
As shown in Figure 2, Fig. 2 is the structural drawing of leg 200 in the present embodiment; Leg 200 comprises leg 210 and lower leg 220; Upper leg 210 comprises two long profiles 211, and long profiles 211 is wooden, and two long profiles 211 are all fixedly installed on contiguous block 214, the layout and two long profiles 211 are parallel to each other; Two long profiles 211 bottoms are provided with the first cutting ferrule 212, first cutting ferrule 212 is coated at two long profiles 211, a clearance space is had in the middle of two long profiles 211, lower leg 220 is through the opening of the first cutting ferrule 212 and the clearance space arrived two long profiles 211, first cutting ferrule 212 limits the freedom of movement of lower leg 220 part, being slidably matched in formation between leg 210 and lower leg 220.The side of the first cutting ferrule 212 is provided with the first bolt 213 with its threaded engagement; Twist the coaxial knob be connected to of the first bolt 213, the end of the first bolt 213 can be made to press on the side of leg 210, there is certain elastic deformation in the long profiles 211 of upper leg 210, upper leg 210 is converted into by being slidably matched the state of compressing with lower leg 220, and stiction makes both geo-stationary in certain field of load between the two.
The second cutting ferrule 230 is set with outside upper leg 210, second cutting ferrule 230 is provided with the second bolt 231, second bolt 231 and the second cutting ferrule 230 threaded engagement, second bolt 231 puts in the inside of the second cutting ferrule 230 from the external rotating of the second cutting ferrule 230, and can be pressed on the side of leg 210.When the second bolt 231 is not pressed on upper leg 210, the second cutting ferrule 230 and upper leg 210 are slidably matched mutually; When the second bolt 231 is pressed on upper leg 210, the second cutting ferrule 230 and upper leg 210 geo-stationary.
The top of wooden lower leg 220 is fixedly connected with the tooth bar 221 vertically arranged, coordinates for transmission, and what the below of lower leg 220 was provided with metal material grabs lower margin 222.
As shown in Figure 3, Fig. 3 is the partial enlarged drawing of leg 200; Second cutting ferrule 230 is provided with work box 240, the first gear 232 is provided with in work box 240, first gear 232 coordinates with the body pivot of work box 240, the second gear 233 is provided with on the surface perpendicular to another of the first gear 232 rotating shaft at work box 240, second gear 233 coordinates with the body pivot of work box 240, and the second gear 233 engages with the first gear 232 transmission; The upper and lower of work box 240 is provided with opening, passes for tooth bar 221.
Tooth bar 221 is passed in casing from the opening of work box 240, and tooth bar 221 engages with the second gear 233 transmission, and when the second gear 233 rotates, band carry-over bar 221 slides up and down.First gear 232 is coaxially connected to adjusting knob 234, and twisting adjusting knob 234 makes the first gear 232 synchronous axial system, drives to tooth bar 221 place through the second gear 233, and tooth bar 221 drives lower leg 220 to move up and down again.
As shown in Figure 2 and Figure 3, the unit translational movement giving tooth bar 234 through the second gear 233 due to the first gear 232 is less, when the first cutting ferrule 212 is compressed upper leg 210 by the first bolt 213, making to produce certain quiet frictional force between leg 210 and lower leg 220 makes both can keep geo-stationary within the scope of certain effect power, is in temporary stabilization state.
When twisting adjusting knob 234, the second gear 233 produces acting force by the flank of tooth to tooth bar 221, when acting force offsets upper quiet frictional force between leg 210 and lower leg 220, again relative movement occurs, realize fine setting before upper leg 210 and lower leg 220.
Preferably, the rotating shaft of adjusting knob 234 and the first gear 232 is arranged on the surface outwardly of the second cutting ferrule 230, and adjusting knob 234 is positioned on the second cutting ferrule 230 front, is convenient to use when user regulates; Can arrange the flank of tooth side of tooth bar 221 outwardly, person easy to use observes the service condition with the tooth bar 221 of extraneous contact, convenient for maintaining.
Finally it is emphasized that; the foregoing is only preferred embodiment of the present utility model; be not limited to the utility model; for a person skilled in the art; the utility model can have various change and change; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. A-frame, comprising:
Upper mounting plate, three upper legs and three lower legs;
Described upper mounting plate and each described upper leg hinged, each described upper leg and a described lower leg are slidably matched;
Described upper leg comprises the first cutting ferrule, and described first cutting ferrule is fixed on the lower end of described upper leg; Described upper leg also comprises the first bolt, described first bolt and described first cutting ferrule threaded engagement, and the end of described first bolt selectively presses on described upper leg;
It is characterized in that: described A-frame also comprises:
Second cutting ferrule, described second cutting ferrule and described upper leg are slidably matched; Described second cutting ferrule is provided with the first gear, and described first gear and described second cutting ferrule are rotationally connected;
Second bolt, described second bolt and described second cutting ferrule threaded engagement, and the end of described second bolt selectively presses on described upper leg;
The top of described lower leg is provided with tooth bar, and described tooth bar engages with described first gear drive.
2. A-frame according to claim 1, is characterized in that:
Be provided with work box in described second cutting ferrule, it is inner that described first gear is positioned at described work box, and described tooth bar selectively puts in or passes described work box.
3. A-frame according to claim 2, is characterized in that:
Also comprise second gear in described working box, described second gear and described work box are rotationally connected, and described second gear also engages with described first gear, described tooth bar with between described tooth bar at described first gear simultaneously.
4. A-frame according to claim 3, is characterized in that:
Described upper leg comprises the contiguous block long profiles identical with two root architectures, and two described long profiles are fixedly connected on the both sides of described contiguous block, forms space between two described long profiles, in the space of described lower leg between two described long profiles.
5. A-frame according to claim 4, is characterized in that:
Described tooth bar is arranged in the upper middle position of described lower leg, and the teeth face outwards of described tooth bar is arranged.
6. A-frame according to claim 5, is characterized in that:
The adjusting knob of described first gear is arranged at the outward surface of described second cutting ferrule.
7. A-frame according to claim 6, is characterized in that:
The end of described second bolt presses on the side of described upper leg.
8. A-frame according to claim 7, is characterized in that:
Two described long profiles of described upper leg are timber.
9. A-frame according to claim 8, is characterized in that:
Described lower leg uses wood materials to make.
10. A-frame according to claim 9, is characterized in that:
Described lower leg lower end is provided with grabs lower margin, described in grab lower margin use metal material make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521027563.6U CN205209520U (en) | 2015-12-10 | 2015-12-10 | Triangular support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521027563.6U CN205209520U (en) | 2015-12-10 | 2015-12-10 | Triangular support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205209520U true CN205209520U (en) | 2016-05-04 |
Family
ID=55847230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521027563.6U Expired - Fee Related CN205209520U (en) | 2015-12-10 | 2015-12-10 | Triangular support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205209520U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318903A (en) * | 2015-12-10 | 2016-02-10 | 中铁十九局集团第七工程有限公司 | A-frame |
-
2015
- 2015-12-10 CN CN201521027563.6U patent/CN205209520U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318903A (en) * | 2015-12-10 | 2016-02-10 | 中铁十九局集团第七工程有限公司 | A-frame |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160504 Termination date: 20171210 |