CN216246395U - Automatic leveling type porro prism - Google Patents
Automatic leveling type porro prism Download PDFInfo
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- CN216246395U CN216246395U CN202122363888.3U CN202122363888U CN216246395U CN 216246395 U CN216246395 U CN 216246395U CN 202122363888 U CN202122363888 U CN 202122363888U CN 216246395 U CN216246395 U CN 216246395U
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Abstract
The utility model relates to an automatic leveling type Porro prism, which comprises a base, a prism support, a ridge prism, a pressure plate, a gasket, an outer cover, a level gauge component and a low rolling resistance bearing, wherein the base is provided with a support base; the base is fixedly connected with the outer cover in a buckling manner, and a prism assembly installation cavity is formed inside the base; a bearing mounting hole is formed in the inner bottom surface of the base and used for mounting a low rolling resistance bearing, and the outer ring of the low rolling resistance bearing is matched with the bearing mounting hole and fixedly connected with the base through a screw; the prism assembly is composed of the prism support, the roof prism, the pressing plate, the gasket and the level gauge component; the low rolling resistance bearing inner ring is matched with the shaft end of the prism support and fixedly connected with the prism support flange through a screw, a V-shaped mounting groove matched with the shape of the roof prism is formed in the prism support, and the roof prism is fixed in the V-shaped mounting groove through a gasket and a pressing plate which are arranged inside and outside in sequence; a horizontal reference mounting surface is arranged on the prism support, and the level gauge component is fixed on the horizontal reference mounting surface. According to the utility model, when the inertial navigation equipment is in an inclined state, the effect of automatically adjusting the prism to a horizontal state is realized.
Description
Technical Field
The utility model belongs to the technical field of reference equipment led out by an inertial navigation system, and particularly relates to an automatic leveling type porro prism.
Background
The orientation leading-out and the orientation measurement of the inertial navigation system are necessary conditions when the inertial navigation system is used. Accurate and rapid direction extraction and measurement of the inertial navigation system are new requirements for adapting to wartime development. The Porro prism is used as a reference device for guiding out the azimuth of the inertial navigation system, and the installation base of the Porro prism is in a horizontal state under the condition of normal operation. With the continuous expansion of the application field of the inertial navigation system, the inertial navigation system is required to be capable of rapidly extracting and measuring the azimuth in a tilting working state in many new application environments, so that the structure of the porro prism needs to be designed again to meet new use requirements.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides the automatic leveling type porro prism which has the advantages of simple and compact structure, high reliability, good stability, small occupied equipment space and wide application range.
The above object of the present invention is achieved by the following technical solutions:
an automatic leveling type porro prism is characterized in that: the device comprises a base, a prism support, a roof prism, a pressure plate, a gasket, an outer cover, a level gauge component and a low rolling resistance bearing;
the base is fixedly connected with the outer cover in a buckling manner, and a prism assembly installation cavity is formed inside the base; a bearing mounting hole is formed in the inner bottom surface of the base, the low rolling resistance bearing is mounted in the bearing mounting hole, and the outer ring of the low rolling resistance bearing is matched with the bearing mounting hole and is fixedly connected with the base through a screw; the low rolling resistance bearing inner ring is matched with the shaft end of the prism support and fixedly connected with the prism support flange through a screw, a V-shaped mounting groove matched with the shape of the roof prism is formed in the prism support, and the roof prism is fixed in the V-shaped mounting groove through the gasket and the pressing plate which are arranged inside and outside in sequence; a horizontal reference mounting surface is arranged on the prism bracket, and the level gauge component is fixed on the horizontal reference mounting surface; the prism assembly is symmetrically designed by taking a vertical plane where the rotation axis of the low rolling resistance bearing is located as a reference plane.
Further: the level part comprises a level seat, a bubble and an end cover; the lower end of the level seat is fixedly installed on a horizontal reference installation surface of the prism support through screws, a bubble installation cavity is formed in the level seat, the bubble is fixed in the bubble installation cavity through gypsum after being adjusted to be in a horizontal state, and the end cover is fixed at the opening end of the bubble installation cavity.
The utility model has the advantages and positive effects that:
1. the prism support, the pressing plate, the gasket and the level gauge component ensure that parts and components have strict central symmetry during design, and the prism support and the base are positioned and matched by the low rolling resistance bearing with small rolling resistance, so that the prism component automatically vertically swings to a vertical plane where a rotating center is positioned under the action of gravity only, and the effect of automatically adjusting the prism to a horizontal state is realized.
2. The prism has the advantages of simple and compact structure, high reliability, good stability and small occupied equipment space, compared with the traditional Porro prism, the prism has wider applicability, can meet the requirement of quickly and conveniently finishing the azimuth extraction and measurement work of an inertial navigation system or other equipment in an inclined state, and can also meet the requirement of quickly finishing the azimuth extraction and measurement work of a vehicle-mounted inertial navigation system in an idle state in a field operation environment.
Drawings
FIG. 1 is a schematic external view of the present invention;
FIG. 2 is a schematic front view of the interior of a Porro prism of the present invention (with the outer cover removed);
FIG. 3 is a schematic diagram of the internal structure of a Porro prism of the present invention;
FIG. 4a is a front view of a level assembly of the present invention;
FIG. 4b is a top view of a level assembly of the present invention;
figure 4c is a side view of a level assembly of the present invention.
Detailed Description
The structure of the present invention will be further described by way of examples with reference to the accompanying drawings. It is to be understood that this embodiment is illustrative and not restrictive.
Referring to fig. 1 to 4c, an automatic leveling porro prism has the following features: the device comprises a base 1, a prism support 8, a roof prism 6, a pressure plate 3, a gasket 5, an outer cover 2, a level gauge component 4 and a low rolling resistance bearing 7.
The base is buckled with the outer cover and is fixedly connected with the outer cover through screws positioned at four corner positions, and a prism assembly mounting cavity is formed inside the base and the outer cover. The inner bottom surface of the base is provided with a bearing mounting hole, the low rolling resistance bearing is mounted in the bearing mounting hole, and an outer ring 7.1 of the low rolling resistance bearing is matched with the bearing mounting hole and is fixedly connected with the base through a screw. The bottom of the prism support is provided with a shaft end and a flange which are matched with the bearing inner ring 7.2, and the shaft end is matched with the inner ring of the low rolling resistance bearing and is fixedly connected with the bearing inner ring through the flange. The prism support is provided with a V-shaped mounting groove matched with the shape of the roof prism, the roof prism is fixed in the V-shaped mounting groove through a gasket and a pressing plate which are sequentially arranged inside and outside, and the gasket is made of polytetrafluoroethylene materials. The gasket plays a role in compressing and protecting the ridge prism. The prism support is provided with a horizontal reference mounting surface which is used for matching with the bottom surface of the level gauge base, so that certain geometric tolerance requirements need to be met, the bottom surface of the prism support needs to meet the geometric tolerance requirement of flatness 0.005, and the horizontal reference mounting surface of the prism support needs to meet the geometric tolerance requirement of flatness 0.005 and parallelism 0.012 to the bottom surface of the prism support. The prism assembly is symmetrically designed by taking a vertical plane where the rotation axis of the low rolling resistance bearing is located as a reference plane.
The level part is of a self-made structure and comprises a level seat 4.1, a bubble 4.2 and an end cover 4.3; wherein, the blister is the purchase piece, and blister surface is provided with marking and reading. Be provided with the bubble mounting chamber on the spirit level seat, the shape of bubble mounting chamber is cylindrical, and its diameter size will be a bit more than the external diameter size of bubble, is provided with the trompil in the one end that corresponds the bubble mounting chamber at least to the realization is put into the bubble mounting chamber with the bubble, and sets up in the upper end of bubble mounting chamber and observes the trompil. After inserting the bubble installation cavity, the position of adjustment bubble in the spirit level seat, when the bubble tends to between two parties, fix the bubble with the gypsum, treat the gypsum and air-dry the shaping back, with end cover fixed mounting at the trompil end, adjust the bubble reading to 0 through the mode of scraping the spirit level seat bottom surface, after the adjustment finishes, with the spirit level part installation of adjusting to the horizontal reference installation face of prism support on.
The rolling damping of the low rolling resistance bearing is small, so that the level error caused by the rolling damping is less than 5 "and can be obtained by reading a level gauge on the prism support.
The automatic leveling type porro prism has the following specific use process:
1. cleaning a mounting surface of a porro prism base and a mounting surface of equipment, aligning and abutting the two mounting surfaces, and fastening the two mounting surfaces by using screws after the two mounting surfaces are abutted;
2. taking down the outer cover of the Porro prism;
3. and after the prism assembly is stabilized, checking the reading of the level gauge, and if the reading is 0, indicating that the prism is in a horizontal state, and leading out the azimuth. If the reading is not 0, applying a tiny rotation disturbance to the prism assembly, aiming at avoiding the rotation blockage caused by the long-time disuse of the Porro prism, checking the reading of the level again after the prism assembly is stabilized again, if the reading is still not 0, repeating the test for a plurality of times, recording the reading of the level in each test and taking the average value as A '(A' is generally less than or equal to 5 '), and leading out the azimuth led out by the Porro prism at the moment, namely leading out the azimuth when the horizontal inclination A' is realized;
4. after the azimuth leading-out measurement work is finished, the outer cover is installed, the screw is screwed tightly, and parts and components inside the prism are protected in a sealing mode.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit of the utility model and the scope of the appended claims, and therefore the scope of the utility model is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (2)
1. An automatic leveling type porro prism is characterized in that: the device comprises a base, a prism support, a roof prism, a pressure plate, a gasket, an outer cover, a level gauge component and a low rolling resistance bearing;
the base is fixedly connected with the outer cover in a buckling manner, and a prism assembly installation cavity is formed inside the base; a bearing mounting hole is formed in the inner bottom surface of the base, the low rolling resistance bearing is mounted in the bearing mounting hole, and the outer ring of the low rolling resistance bearing is matched with the bearing mounting hole and is fixedly connected with the base through a screw; the low rolling resistance bearing inner ring is matched with the shaft end of the prism support and fixedly connected with the prism support flange through a screw, a V-shaped mounting groove matched with the shape of the roof prism is formed in the prism support, and the roof prism is fixed in the V-shaped mounting groove through the gasket and the pressing plate which are arranged inside and outside in sequence; a horizontal reference mounting surface is arranged on the prism bracket, and the level gauge component is fixed on the horizontal reference mounting surface; the prism assembly is symmetrically designed by taking a vertical plane where the rotation axis of the low rolling resistance bearing is located as a reference plane.
2. The auto-leveling porro prism of claim 1, wherein: the level part comprises a level seat, a bubble and an end cover; the lower end of the level seat is fixedly installed on a horizontal reference installation surface of the prism support through screws, a bubble installation cavity is formed in the level seat, the bubble is fixed in the bubble installation cavity through gypsum after being adjusted to be in a horizontal state, and the end cover is fixed at the opening end of the bubble installation cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122363888.3U CN216246395U (en) | 2021-09-28 | 2021-09-28 | Automatic leveling type porro prism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122363888.3U CN216246395U (en) | 2021-09-28 | 2021-09-28 | Automatic leveling type porro prism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216246395U true CN216246395U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122363888.3U Active CN216246395U (en) | 2021-09-28 | 2021-09-28 | Automatic leveling type porro prism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216246395U (en) |
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2021
- 2021-09-28 CN CN202122363888.3U patent/CN216246395U/en active Active
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