Light shielding device of theodolite

Abstract

The utility model relates to the technical field of optical measuring equipment, in particular to a theodolite shading device, which comprises an outer cover shell and an organ cover, a light hole is arranged on the outer cover shell, a driving motor is mounted at one end in the outer cover shell, the driving motor is connected with a transmission shaft, and the transmission shaft is connected with a transmission unit. The organ cover is located at the other end, opposite to the transmission shaft, in the outer cover shell and connected with the transmission unit. When the driving motor operates, the transmission unit can drive the organ cover to reciprocate so as to shield or open the light hole. According to the theodolite light shield, the motor can be used for driving the organ cover to automatically shield and transmit light to the primary mirror of the theodolite, all the parts are integrally installed in the outer shell, the theodolite light shield is compact in structure and easy to install, meanwhile, the power-off brake is used for achieving position locking of the organ cover, the organ cover can be prevented from sliding off and loosening, and the service life of the theodolite light shield is prolonged. And the shading and light-transmitting effects are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of optical measuring equipment, and specifically provides a theodolite shading device. Background Art

[0002] Theodolite is a measuring instrument designed according to the principle of angle measurement for measuring horizontal and vertical angles. It is usually divided into optical theodolites and electronic theodolites. Optical theodolites are mainly used for measuring longitudinal and transverse axis lines (center lines), verticality, horizontal angles and vertical angles, etc. Optical theodolites are mainly used for measuring plane control networks for mechanical and electrical engineering buildings (structures) and for controlling the plumbness of plant (workshop) column installations. They are used to measure longitudinal and transverse center lines, establish installation measurement control networks and perform measurement control throughout the installation process.

[0003] During the use of an optical theodolite, its main mirror needs to be shielded or transparent. The main mirror hood of the theodolite is an automatic light-transmitting and light-blocking mechanism. The earliest existing design is that the gear or toothed belt wheel on the motor drives the gear or toothed belt wheel on the transmission shaft to drive the accordion cover to move, and the accordion cover is fixed by magnetic steel. The design scheme of the existing technology has technical problems such as the structure is not compact enough and the accordion cover is easy to slide and fall off. After searching, the following schemes involve the shading device of the theodolite:

[0004] 1. The utility model patent with patent number "202222170270.X" and name "A total station shading plate adjustment device" includes a total station body, a receiving plate, a circular slide groove, a slider, a connecting column, a connecting block, a cavity, groove one, groove two, a blocking column, a spring, a connecting rod, groove three and groove four. The shading plate adjustment device in this scheme can realize automatic shading and light transmission of the total station lens, but its driving method is not suitable for the shading device of the theodolite.

[0005] 2. The utility model patent with the patent number "202020595475.0" and the name "An automatic light blocking device for the tray entering and exiting the bin of an optical detection system" includes an accordion cover, a Y-axis adsorption magnet and a positioning magnet. The fixed end of the accordion cover is fixed to the side wall of the light blocking channel opposite to the light leakage port, and an adsorption iron plate is fixed to the movable end of the accordion cover. A positioning magnet is fixed to the side wall of the light blocking channel where the light leakage port is provided, and a Y-axis adsorption magnet is fixed on the Y-axis platform. The light blocking device in this scheme has a technical problem similar to the prior art that the accordion cover is easy to slip and loosen.

[0006] 3. The invention patent with the patent number of "201010542657.2" and the name of "window assembly with motorized shading device" includes the first and second shading curtains, the first rod assembly, the second rod assembly, the first end connection, the second end connection, etc. This solution is mainly used for the automatic shading and light transmission device of vehicle windows, which is difficult to meet the shading requirements of theodolite.

[0007] In summary, based on the technical problems existing in the aforementioned prior art, how to design a theodolite shading device with good shading and light transmission effects and an accordion cover that is not easy to slip off is a problem that urgently needs to be solved. Utility Model Content

[0008] In order to solve the above problems, the utility model provides a theodolite shading device, which can realize automatic shading and light transmission for the main mirror of the theodolite, and various components are integrated in an outer shell, which has a compact structure and is easy to install. At the same time, the accordion cover can be prevented from sliding and loosening, thereby ensuring the shading and light transmission effects.

[0009] The present invention provides a theodolite shading device, comprising an outer cover shell and an accordion cover; the outer cover shell is provided with a light-transmitting hole, a driving motor is installed in the outer cover shell, the driving motor is connected to a transmission shaft, and the transmission shaft is connected to a transmission unit; the accordion cover is located at an end of the outer cover shell opposite to the transmission shaft and is connected to the transmission unit, and when the driving motor is running, the accordion cover is driven to reciprocate through the transmission unit to block or open the light-transmitting hole.

[0010] Furthermore, the transmission unit includes a toothed belt, and both ends of the transmission shaft are respectively connected to a driving toothed belt pulley, and a passive toothed belt pulley is provided at the front end of the accordion cover. The driving toothed belt pulley drives the passive toothed belt pulley to rotate through the engagement of the toothed belt, and a driving beam is provided between the two passive toothed belt pulleys and the driving beam is connected to the accordion cover.

[0011] Furthermore, a locking device is connected to the transmission shaft to lock the rotation of the transmission shaft.

[0012] Furthermore, the locking device is a power-loss brake connected to the transmission shaft.

[0013] Furthermore, bearing seats are connected to the two ends of the outer cover shell near the transmission shaft, and the optical axis bearings are sleeved in the bearing seats. The transmission shaft passes through the optical axis bearings and is connected to the active toothed belt pulley; toothed belt pulley seats are installed at the two ends of the outer cover shell near the accordion cover, and the passive toothed belt pulley is installed on the toothed belt pulley seats.

[0014] Furthermore, the toothed belts on both sides are connected with fixed blocks, and the fixed blocks are connected to the driving crossbeam.

[0015] Furthermore, a position detection device is installed on the upper part of the toothed belt on one side and in the outer cover shell, and when the fixed block moves with the toothed belt, the position detection device can be triggered to generate a position signal.

[0016] Furthermore, a pressure plate 1 is connected between the driving crossbeam and the accordion cover, and a pressure plate 2 is connected between the accordion cover and the outer cover shell.

[0017] Furthermore, the driving motor is installed inside the outer cover shell through a motor seat, the power-off brake is installed inside the outer cover shell through a brake seat, and the transmission shaft is connected to the driving motor and the power-off brake through a coupling.

[0018] Furthermore, a locking ring is connected to the transmission shaft on one side of the bearing seat.

[0019] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0020] 1. The theodolite light shield in the utility model can utilize a motor to drive the accordion cover to automatically shield and transmit light to the main mirror of the theodolite. All components are integrated and installed in an outer shell, with a compact structure and easy installation.

[0021] 2. The theodolite hood in the utility model can utilize a power-off brake to lock the position of the accordion hood, thereby preventing the accordion hood from slipping and loosening, and ensuring the effects of shading and light transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the shading device provided by the embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of removing the upper cover of the shading device provided by the embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the internal structure of the shading device provided by the embodiment of the utility model;

[0025] Figure 4 It is a cross-sectional view of the shading device provided by an embodiment of the utility model along the axis of the driving shaft.

[0026] The accompanying drawings include: outer cover shell 1, active toothed belt pulley 2, toothed belt 3, optical axis bearing 4, bearing seat 5, locking ring 6, transmission shaft 7, coupling 8, motor seat 9, drive motor 10, light transmission hole 11, power-off brake 13, brake seat 14, pressure plate 1 16, pressure plate 2 17, Hall sensor 18, drive beam 20, fixing block 21, passive toothed belt pulley 23, toothed belt pulley seat 24, accordion cover 26, reinforcing ribs 27, upper cover 28, and fixing embedded nails 29. DETAILED DESCRIPTION

[0027] In the following, reference will be made to the Figure 1-4 Describe the embodiment of the utility model. In the following description, the same modules are represented by the same reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, the detailed description thereof will not be repeated.

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the following Figure 1-4 It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation on the present invention.

[0029] A theodolite shading device, such as Figure 1-Figure 4 As shown, it includes an outer cover shell 1, which has a light-transmitting hole 11. A driving motor 10 is installed at one end inside the outer cover shell 1, and the driving motor 10 is connected to the transmission shaft 7. The transmission shaft 7 is connected to the transmission unit. The theodolite shading device also includes an accordion cover 26, which is located at the end of the outer cover shell 1 opposite to the transmission shaft 7 and is connected to the transmission unit. When the driving motor 10 is running, the accordion cover 26 can be driven by the transmission unit to reciprocate to block or open the light-transmitting hole 11.

[0030] In this embodiment, the size of the light-transmitting hole 11 matches the main mirror of the theodolite. The outer cover shell 1 is a rectangular frame structure. Reinforcing ribs 27 are connected around the light-transmitting hole 11 to ensure the mechanical strength of the entire structure. The outer cover shell 1 has a detachable upper cover 28. Fixed nails 29 are pre-embedded on the back of the outer cover shell 1. The device and the main mirror of the theodolite can be easily assembled using the fixed nails 29.

[0031] The transmission unit includes a toothed belt 3, and a driving toothed belt wheel 2 is connected to both ends of the transmission shaft 7, and a passive toothed belt wheel 23 is provided at the front end of the accordion cover 26. The driving toothed belt wheel 2 drives the passive toothed belt wheel 23 to rotate through the meshing of the toothed belt 3. A driving beam 20 is provided between the two passive toothed belt wheels 23, and the driving beam 20 is connected between the two passive toothed belt wheels 23. The driving beam 20 is connected to the accordion cover 26. The transmission stability of the toothed belt 3 is good, and a driving toothed belt wheel 2 is connected to both ends of the transmission shaft 7, and the driving toothed belt wheels 2 on both sides drive the passive toothed belt wheels 23 to rotate through the toothed belt 3. Driven by the driving beam 20, the accordion cover 26 can maintain a balanced torque during the stretching process, and will not deflect and jam due to uneven force.

[0032] A locking device is also connected to the transmission shaft 7 for locking the rotation of the transmission shaft 7. The locking device is a power-off brake 13 connected to the transmission shaft 7. The power-off brake 13 can controllably lock and brake the transmission shaft 7, and can also be locked after the power is cut off from the device, thereby ensuring that the accordion cover 26 will not slip or loosen.

[0033] The outer cover shell 1 is connected to the two ends near the transmission shaft 7 with bearing seats 5, and the optical axis bearings 4 are sleeved in the bearing seats 5. The transmission shaft 7 passes through the optical axis bearings 4 and is connected to the active toothed belt wheel 2. Toothed belt wheel seats 24 are installed at the two ends near the accordion cover 26 inside the outer cover shell 1, and the passive toothed belt wheel 23 is installed on the toothed belt wheel seat 24. Fixed blocks 21 are connected to the toothed belts 3 on both sides, and the fixed blocks 21 are connected to the driving beam 20. The fixed block 21 is L-shaped in this embodiment and can be vertically connected to the driving beam 20.

[0034] A position detection device is installed on the upper part of the toothed belt 3 on one side and in the outer cover shell 1. When the fixed block 21 moves with the toothed belt 3, it can trigger the position detection device to generate a position signal. In this embodiment, the position detection device is a Hall sensor 18. When the fixed block 21 approaches the Hall sensor 18, it can trigger a position signal to obtain the position information of the accordion cover 26. Alternatively, the position detection device can also be a proximity switch or an infrared sensor, etc.

[0035] A pressure plate 16 is connected between the driving beam 20 and the accordion cover 26, and a pressure plate 2 17 is connected between the accordion cover 26 and the outer cover shell 1. The pressure plate 16 and the pressure plate 2 17 are respectively located at the head and tail ends of the accordion cover 26, and can press and tighten the folded accordion cover 26 to prevent it from loosening.

[0036] The driving motor 10 is installed inside the outer cover shell 1 through the motor seat 9, the power-off brake 13 is installed inside the outer cover shell 1 through the brake seat 14, the transmission shaft 7 is connected to the driving motor 10 and the power-off brake 13 through the coupling 8, and a locking ring 6 is connected to the transmission shaft 7 on one side of the bearing seat 5, and the locking ring 6 can prevent the transmission shaft 7 from loosening.

[0037] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0038] The above specific implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A theodolite shading device, characterized in that: The invention comprises an outer cover shell (1) and an accordion cover (26); the outer cover shell (1) is provided with a light-transmitting hole (11); a driving motor (10) is installed in the outer cover shell (1); the driving motor (10) is connected to a transmission shaft (7) and the transmission shaft (7) is connected to a transmission unit; the accordion cover (26) is located at an end of the outer cover shell (1) opposite to the transmission shaft (7) and is connected to the transmission unit; when the driving motor (10) is in operation, the accordion cover (26) is driven to reciprocate through the transmission unit to cover or open the light-transmitting hole (11).

2. The theodolite shading device according to claim 1, characterized in that: The transmission unit comprises a toothed belt (3), two ends of a transmission shaft (7) are respectively connected to driving toothed belt wheels (2), a front end of an accordion cover (26) is provided with a passive toothed belt wheel (23), the driving toothed belt wheel (2) drives the passive toothed belt wheel (23) to rotate through meshing with the toothed belt (3), a driving crossbeam (20) is provided between the two passive toothed belt wheels (23), and the driving crossbeam (20) is connected to the accordion cover (26).

3. The theodolite shading device according to claim 2, characterized in that: The transmission shaft (7) is connected with a locking device to lock the rotation of the transmission shaft (7).

4. The theodolite shading device according to claim 3, characterized in that: The locking device is a power-off brake (13) connected to the transmission shaft (7).

5. The theodolite shading device according to claim 2, characterized in that: The outer cover shell (1) is connected to bearing seats (5) at both ends close to the transmission shaft (7), and an optical axis bearing (4) is sleeved in the bearing seats (5). The transmission shaft (7) passes through the optical axis bearing (4) and is connected to the active toothed belt wheel (2); toothed belt wheel seats (24) are installed at both ends close to the accordion cover (26) inside the outer cover shell (1), and the passive toothed belt wheel (23) is installed on the toothed belt wheel seat (24).

6. The theodolite shading device according to claim 5, characterized in that: The toothed belts (3) on both sides are connected with fixed blocks (21), and the fixed blocks (21) are connected to the driving crossbeam (20).

7. The theodolite shading device according to claim 6, characterized in that: A position detection device is installed on the upper part of the toothed belt (3) on one side and inside the outer cover shell (1); when the fixed block (21) moves with the toothed belt (3), the position detection device can be triggered to generate a position signal.

8. The theodolite shading device according to claim 7, characterized in that: A pressure plate 1 (16) is connected between the driving cross beam (20) and the accordion cover (26), and a pressure plate 2 (17) is connected between the accordion cover (26) and the outer cover shell (1).

9. The theodolite shading device according to claim 2, characterized in that: The drive motor (10) is installed inside the outer housing (1) via a motor seat (9), the power-off brake (13) is installed inside the outer housing (1) via a brake seat (14), and the transmission shaft (7) is connected to the drive motor (10) and the power-off brake (13) via a coupling (8).

10. The theodolite shading device according to claim 5, characterized in that: A locking ring (6) is connected to the transmission shaft (7) on one side of the bearing seat (5).

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