CN202956131U - Locking mechanism for measuring instrument - Google Patents
Locking mechanism for measuring instrument Download PDFInfo
- Publication number
- CN202956131U CN202956131U CN 201220736672 CN201220736672U CN202956131U CN 202956131 U CN202956131 U CN 202956131U CN 201220736672 CN201220736672 CN 201220736672 CN 201220736672 U CN201220736672 U CN 201220736672U CN 202956131 U CN202956131 U CN 202956131U
- Authority
- CN
- China
- Prior art keywords
- needle roller
- roller pin
- rotation axis
- rotating shaft
- fixed sleeve
- 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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- Details Of Measuring And Other Instruments (AREA)
Abstract
The utility model discloses a locking mechanism for a measuring instrument, which comprises a fixed sleeve, a rotating shaft, an ejection rod and three roller pins, namely a roller pin 1, a roller pin 2 and a roller pin 3. The upper end of the circular interior of the fixed sleeve is provided with the rotating shaft. The lower end of the rotating shaft is provided with the roller pin 2 and the roller pin 3. The lower end of the roller pin 1 is provided with the ejection rod. The locking mechanism has the advantages of simple and reasonable structure and firm and reliable locking effect, and can eliminate the phenomena of jogging and backlash. Meanwhile, although both the coordination requirement of the rotating shaft with the fixed sleeve and the coordination requirement of the ejection rod with the fixed sleeve are lowered, the purposes of locking and non-backlash jogging are still realized.
Description
Technical field
The utility model relates to the accessory field that the exact instrument rotation axis is used, particularly a kind of surveying instrument latch mechanism.
Background technology
The rotation axis General Requirements of exact instrument has locking and fine motion function, in order to make the motion parts of instrument be arranged to rapidly and exactly desired position.Three kinds of latch mechanisms of general employing in exact instrument: top-closed structure, banding formula, clamped-in style.Wherein top-closed structure is most widely used general, and it is comprised of rotation axis, medium element, push rod and decompression brake(-holder) block.The decompression brake(-holder) block of exact instrument generally is comprised of 3 special-shaped blocks, and the specification of these 3 special-shaped blocks need coordinate the specification that is braked element, and manufacturing cost and manufacture difficulty are larger.
Summary of the invention
Goal of the invention of the present utility model is in order to overcome the shortcoming of above-mentioned background technology, provides a kind of simple and reasonable for structure, locks solid and reliable, as to eliminate fine motion backlash latch mechanism.
Goal of the invention of the present utility model is achieved by the following technical solution: a kind of surveying instrument latch mechanism, it comprises fixed cover, rotation axis, push rod, needle roller, described needle roller has three, be respectively needle roller one, needle roller two, needle roller three, the circular interior upper end position place of described fixed cover is provided with rotation axis, the lower end of described rotation axis is provided with needle roller two and needle roller three, and the lower end of described needle roller one is provided with push rod.
Described needle roller can adopt different diameter combination.
The beneficial effects of the utility model are: the utility model is simple and reasonable for structure, locks solid and reliablely, can eliminate fine motion backlash phenomenon; And the utility model in the situation that reduce to rotation axis and fixed cover coordinate requirement and push rod and fixed cover coordinate requirement still can realize locking and fine motion without the purpose of backlash.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is structural representation under the utility model relaxation state;
Fig. 3 is structural representation under the utility model locking state;
Wherein: 1, fixed cover, 2, transmission shaft, 3, needle roller two, 4, push rod, 5, needle roller one, 6, needle roller three.
Embodiment
The present embodiment is a kind of surveying instrument latch mechanism, and it comprises fixed cover 1, rotation axis 2, push rod 4, needle roller.
Needle roller has three as shown in Figure 1, is respectively needle roller 1, needle roller 23, needle roller 36, and the circular interior upper end position place of fixed cover 1 is provided with rotation axis 2, and the lower end of rotation axis 2 is provided with needle roller 23 and needle roller 36, and the lower end of needle roller 1 is provided with push rod 4.
As shown in Figure 2, when push rod 4 is subject to thrust upwards, push rod 4 moves up and promotes needle roller 1 and move up, when needle roller 1 moves up, thrust is put on to needle roller 23 and needle roller 36, the stressed rear movement of needle roller 23 and needle roller 36, be hampered in rotation axis 2 and fixed cover 1, thereby rotation axis 2 and fixed cover 1 are fixed together, as shown in Figure 3.
Claims (1)
1. a surveying instrument latch mechanism, it is characterized in that it comprises fixed cover, rotation axis, push rod, needle roller, described needle roller has three, be respectively needle roller one, needle roller two, needle roller three, the circular interior upper end position place of described fixed cover is provided with rotation axis, the lower end of described rotation axis is provided with needle roller two and needle roller three, and the lower end of described needle roller one is provided with push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220736672 CN202956131U (en) | 2012-12-28 | 2012-12-28 | Locking mechanism for measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220736672 CN202956131U (en) | 2012-12-28 | 2012-12-28 | Locking mechanism for measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202956131U true CN202956131U (en) | 2013-05-29 |
Family
ID=48461698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220736672 Expired - Fee Related CN202956131U (en) | 2012-12-28 | 2012-12-28 | Locking mechanism for measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202956131U (en) |
-
2012
- 2012-12-28 CN CN 201220736672 patent/CN202956131U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20130529 Termination date: 20151228 |
|
| EXPY | Termination of patent right or utility model |