Zenith instrument with calibration structure

Abstract

The invention relates to the technical field of measuring instruments, and discloses a zenith instrument with a calibration structure, the zenith instrument with the calibration structure comprises a calibration frame, a support rod is hinged to the lower surface of the calibration frame, a support plate is hinged to one end, away from the calibration frame, of the support rod, a protection mechanism is arranged below the support plate, and the protection mechanism is connected with the calibration frame. According to the zenith instrument with the calibration structure, when the calibration frame is collided and the supporting plate moves, a reset spring and an annular air bag deform to buffer the impact of the calibration frame, and meanwhile, a sliding ball is matched with the supporting plate to move, so that the calibration frame is prevented from being collided; a sliding ball makes contact with a retarding belt under the action of a cylindrical block and an extension spring for retarding to prevent the calibration frame from swinging back and forth to affect the precision of the calibration frame, a fixing plate is fixed to some special terrains through fixing nails, and a friction belt on the fixing plate is fixed to the stable terrains to guarantee the overall stability of a supporting rod. And the zenith instrument can be calibrated by the calibration frame more stably.

Description

Technical Field

[0001] The invention relates to the technical field of measuring instruments, in particular to a zenith instrument with a calibration structure. Background Art

[0002] The zenith meter is a measuring instrument that can supervise and inspect construction measurements during civil construction and equipment installation. The zenith meter is mainly used to transfer plane coordinate points up and down at the same plane position. In addition to being sent to a qualified calibration agency for calibration every year, the zenith meter used on the construction site also requires the user to perform a self-inspection of the instrument and calibrate the instrument for any deviations. The zenith meter has a large magnification, so the instrument with deviations needs to be fine-tuned during calibration, and then calibrated again after fine-tuning until it is qualified. The operation process needs to ensure a stable environment without interference.

[0003] According to a new type of portable calibration device (announcement number: CN218599346U) disclosed, when the portable tripod in the above application is placed on an outdoor cement slope, the zenith telescope is first calibrated horizontally by adjusting the length of the legs on the portable tripod. Subsequently, the pad, square frame groove, frame, square frame anti-slip pad and limit assembly cooperate with each other to make the portable tripod more stable when placed on the cement slope, and the friction between the portable tripod and the cement slope is large, so it is not easy to slide, which is conducive to the zenith telescope to measure on the cement slope.

[0004] However, in the actual use of the above equipment, the zenith instrument is a precision instrument. During the calibration process, the experimenter will inevitably collide with the calibration frame, causing the bracket for calibrating the zenith instrument to shake, damaging the balance of the support rod of the calibration frame, and reducing the precision of the zenith instrument. In view of this, we propose a zenith instrument with a calibration structure. Summary of the invention

[0005] The object of the present invention is to provide a zenith telescope with a calibration structure to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a zenith telescope with a calibration structure, comprising a calibration frame, a support rod hinged to the lower surface of the calibration frame, an end of the support rod away from the calibration frame hinged to a support plate, a protective mechanism is arranged below the support plate, an adjustment mechanism is arranged below the support plate, a promotion mechanism is arranged below the support plate, and the protective mechanism comprises:

[0007] A movable groove, wherein the movable groove is provided on the lower surface of the support plate, an annular airbag is fixedly installed on the inner wall of the movable groove, a return spring is fixedly connected to the inner wall of the movable groove, an end of the return spring away from the movable groove is fixedly connected to a fixed rod, and a lower surface of the fixed rod is fixedly connected to a fixed plate;

[0008] A through hole is provided on the surface of the support plate, the inner wall of the through hole is fixedly connected to a tension spring, one end of the tension spring away from the inner wall of the through hole is fixedly connected to a cylindrical block, a sliding ball is movably installed on the lower surface of the cylindrical block, a deceleration belt is fixedly installed on the upper surface of the fixed plate, and fixing nails are arranged on the lower surface of the fixed plate.

[0009] Preferably, the adjustment mechanism includes a knob, which is movably mounted on the surface of the fixed plate, the inner wall of the knob is threadedly connected to a threaded rod, an adjustment ring is movably mounted on the lower surface of the threaded rod, the lower surface of the adjustment ring is fixedly connected to a telescopic spring, one end of the telescopic spring away from the adjustment ring is fixedly connected to a circular ring, a nail hole is provided on the lower surface of the fixed plate, and an adjustment groove is provided inside the fixed plate.

[0010] Preferably, the promotion mechanism includes a mounting block, which is fixedly mounted on the lower surface of the ring, and a movable groove is provided on the surface of the mounting block. The inner wall of the movable groove is fixedly connected to a movable spring, and one end of the movable spring away from the movable groove is fixedly connected to a fixing pin, and the arc surface of the fixing pin fixes the mounting protrusion, and a limiting groove is provided on the inner wall of the movable groove.

[0011] Preferably, a circular hole is provided on the surface of the fixing plate, the diameter of the circular hole is matched with the diameter of the threaded rod, and there are three circular holes. The three circular holes are provided in a circular array on the surface of the fixing plate, which is convenient for installing three knobs. The knobs can be adjusted from three directions, and the threaded rod can be moved to adjust the moving length of the fixing nail, thereby ensuring that the fixing nail is stably fixed to the ground.

[0012] Preferably, the maximum diameter of the annular airbag is adapted to the diameter of the movable groove, and the minimum diameter of the annular airbag is adapted to the diameter of the fixed rod. The annular airbag is sleeved on the surface of the fixed rod to buffer the movement of the support plate, thereby preventing the support plate from moving too fast, which would be detrimental to the balance of the support rod.

[0013] Preferably, the diameter of the through hole is matched with the diameter of the cylindrical block, and a through groove is provided on the surface of the cylindrical block, and the shape of the through groove is matched with the shape of the sliding ball, so that the sliding ball can rotate freely on the surface of the through groove, and the support plate can move better on the surface of the fixed plate under the action of the sliding ball.

[0014] Preferably, the diameter of the adjustment groove is matched with the diameter of the adjustment ring, and the diameter of the adjustment groove is matched with the diameter of the circular ring. The rotation of the knob drives the threaded rod to move, so that the adjustment ring moves and the circular ring moves inside the adjustment groove under the action of the telescopic spring.

[0015] Preferably, the diameter of the movable groove is matched with the end diameter of the fixing nail, the protrusion is circular, the shape of the protrusion is matched with the shape of the limiting groove, the number of the protrusions is provided in two groups, and the two groups of protrusions are fixedly installed in a circular array on the arc surface of the fixing nail to ensure that the protrusion can move along the limiting groove to drive the fixing nail to rotate.

[0016] Preferably, the deceleration belt is composed of a plurality of semicircular convex rings, and the plurality of semicircular convex rings are fixed on the surface of the fixed plate in a linear array with the same center. The diameters of the plurality of semicircular convex rings increase from the center to the outside, which has the effect of decelerating the movement of the sliding ball and preventing the support plate from swinging back and forth after moving, which is not conducive to the calibration accuracy of the calibration frame.

[0017] Preferably, there are several reset springs, which are fixedly installed in a circular array on the arc surface of the fixed rod, and cooperate with the annular airbag to ensure that the support plate is impacted to drive the calibration frame as a whole to shift, thereby buffering the impact force. Secondly, the reset spring and the annular airbag ensure that the support plate is reset.

[0018] Compared with the prior art, the present invention provides a zenith telescope with a calibration structure, which has the following beneficial effects:

[0019] 1. The zenith telescope with a calibration structure is provided with a protective mechanism. When the calibration frame is hit, the reset spring and the annular airbag are deformed when the support plate moves, so as to cushion the impact of the calibration frame. At the same time, the sliding ball moves with the support plate. Under the action of the cylindrical block and the tension spring, the sliding ball contacts the deceleration belt to decelerate and prevent the calibration frame from swinging back and forth to affect the accuracy of the calibration frame. Secondly, the fixing plate is fixed to some special terrains by fixing nails, and the friction belt on the fixing plate is fixed to the stable terrain to ensure the overall stability of the support rod, so that the calibration frame can calibrate the zenith telescope more stably and the calibration accuracy is better.

[0020] 2. The zenith telescope with a calibration structure is provided with an adjustment mechanism. By turning the knob, the threaded rod is moved to drive the adjustment ring to move, so that the telescopic spring is deformed to facilitate the movement of the fixing nail on the ring from the inside of the nail hole, and some soft soil is inserted to better fix the fixing nail. When facing different soil types, the knob is adjusted to make the threaded rod continue to move downward, ensuring that the fixing nail is fixed to a suitable position, ensuring the stability of the calibration frame, and facilitating the subsequent calibration frame to adjust the accuracy of the zenith telescope.

[0021] 3. The zenith telescope with a calibration structure is provided with a promotion mechanism. During the adjustment process of the adjustment mechanism, when the fixed nail moves downward, the fixed nail encounters some soil blocks that are difficult to insert. Under the action of the movable spring, the fixed nail moves inside the mounting block, so that the protrusion on the fixed nail moves inside the limiting groove, driving the fixed nail to rotate, so that the fixed nail can be better inserted into the ground, ensuring that the fixed nail is better fixed to the ground, and ensuring the stability of the calibration frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of the main structure of the calibration frame of the present invention;

[0023] FIG2 is a schematic diagram of a partial explosion structure of a support plate according to the present invention;

[0024] FIG3 is a schematic diagram of a partial cross-sectional structure of a fixing plate of the present invention;

[0025] FIG4 is a partial cross-sectional schematic diagram of a structural fixing plate of the present invention;

[0026] FIG5 is a schematic diagram of a partial structure of an adjustment ring of the present invention;

[0027] FIG. 6 is a schematic diagram of a partial explosion structure of a fixing nail of the present invention.

[0028] In the figure: 1. calibration frame; 2. support rod; 3. protection mechanism; 301. movable groove; 302. reset spring; 303. fixed rod; 304. annular airbag; 305. through hole; 306. tension spring; 307. cylindrical block; 308. sliding ball; 309. retarder; 310. fixed plate; 311. fixing nail; 4. adjustment mechanism; 401. knob; 402. threaded rod; 403. adjustment groove; 404. adjustment ring; 405. telescopic spring; 406. circular ring; 407. nail hole; 5. promotion mechanism; 501. mounting block; 502. movable groove; 503. movable spring; 504. limit groove; 505. protrusion; 6. support plate. DETAILED DESCRIPTION

[0029] As shown in Figures 1 to 6, the present invention provides a technical solution: a zenith telescope with a calibration structure, including a calibration frame 1, the lower surface of the calibration frame 1 is hinged to a support rod 2, the support rod 2 is hinged to a support plate 6 at one end away from the calibration frame 1, a protective mechanism 3 is arranged below the support plate 6, an adjustment mechanism 4 is arranged below the support plate 6, and a promotion mechanism 5 is arranged below the support plate 6, the protective mechanism 3 includes a movable groove 301, a reset spring 302, a fixed rod 303, an annular airbag 304, a through hole 305, a tension spring 306, a cylindrical block 307, a sliding ball 308, a deceleration belt 309, a fixed plate 310, and a fixing nail 311.

[0030] In one embodiment of the present invention, a movable groove 301 is provided on the lower surface of a support plate 6, an annular airbag 304 is fixedly installed on the inner wall of the movable groove 301, a reset spring 302 is fixedly connected to the inner wall of the movable groove 301, one end of the reset spring 302 away from the movable groove 301 is fixedly connected to a fixed rod 303, a lower surface of the fixed rod 303 is fixedly connected to a fixed plate 310, a through hole 305 is provided on the surface of the support plate 6, a tension spring 306 is fixedly connected to the inner wall of the through hole 305, one end of the tension spring 306 away from the inner wall of the through hole 305 is fixedly connected to a cylindrical block 307, a sliding ball 308 is movably installed on the lower surface of the cylindrical block 307, a deceleration belt 309 is fixedly installed on the upper surface of the fixed plate 310, a fixing nail 311 is provided on the lower surface of the fixed plate 310, and an adjustment groove 403 is provided inside the fixed plate 310.

[0031] In addition, the adjustment mechanism 4 includes a knob 401, which is movably mounted on the surface of the fixed plate 310, the inner wall of the knob 401 is threadedly connected to the threaded rod 402, and the lower surface of the threaded rod 402 is movably mounted with an adjustment ring 404, the lower surface of the adjustment ring 404 is fixedly connected with a telescopic spring 405, and one end of the telescopic spring 405 away from the adjustment ring 404 is fixedly connected with a circular ring 406, and a nail hole 407 is provided on the lower surface of the fixed plate 310, and the promotion mechanism 5 includes a mounting block 501, the mounting block 501 is fixedly mounted on the lower surface of the circular ring 406, a movable groove 502 is provided on the surface of the mounting block 501, the inner wall of the movable groove 502 is fixedly connected with a movable spring 503, and one end of the movable spring 503 away from the movable groove 502 is fixedly connected with the fixing nail 311, the arc surface of the fixing nail 311 is fixedly mounted with a protrusion 505, and the inner wall of the movable groove 502 is provided with a limiting groove 504.

[0032] In the embodiment of the present invention, a circular hole is provided on the surface of the fixing plate 310, and the diameter of the circular hole is matched with the diameter of the threaded rod 402. There are three circular holes, and the three circular holes are provided on the surface of the fixing plate 310 in a circular array, so as to facilitate the installation of three knobs 401. The knobs 401 are adjusted from three directions, and the threaded rod 402 is moved to adjust the moving length of the fixing nail 311 to ensure the stability of the fixing nail 311 fixed to the ground. The maximum diameter of the annular airbag 304 is matched with the diameter of the moving groove 301, and the minimum diameter of the annular airbag 304 is matched with the diameter of the fixing rod 303. The annular airbag 304 is sleeved on the surface of the fixing rod 303 to play a role in the movement of the support plate 6. The buffering effect prevents the support plate 6 from moving too fast, which is not conducive to the balance of the support rod 2. The diameter of the through hole 305 is adapted to the diameter of the cylindrical block 307. A through groove is provided on the surface of the cylindrical block 307. The shape of the through groove is adapted to the shape of the sliding ball 308, so that the sliding ball 308 can rotate freely on the surface of the through groove, so that the support plate 6 can be better moved on the surface of the fixed plate 310 under the action of the sliding ball 308. There are three support rods 2, and the three support rods 2 are hinged to the lower surface of the calibration frame 1 in a circular array. The hinged support rod 2 can well ensure the angle of movement of the support rod 2. The support plate 6 hinged at one end of the support rod 2 ensures the stability of the calibration frame 1.

[0033] Furthermore, the diameter of the adjusting groove 403 is matched with the diameter of the adjusting ring 404, and the diameter of the adjusting groove 403 is matched with the diameter of the circular ring 406. The threaded rod 402 is moved by rotating the knob 401, driving the adjusting ring 404 and the circular ring 406 to move inside the adjusting groove 403, adjusting the length of the fixing nail 311 inserted into the ground, and ensuring the stability of the movement of the adjusted threaded rod 402 and the fixing nail 311. The diameter of the movable groove 502 is matched with the end diameter of the fixing nail 311, the protrusion 505 is circular, and the shape of the protrusion 505 is matched with the shape of the limiting groove 504. There are two groups of protrusions 505, and the two groups of protrusions 505 are fixedly installed on the arc surface of the fixing nail 311 in a circular array. The limiting groove 504 is a small section of the spiral downward arc, ensuring that the protrusion 505 can move along the limiting groove 504 to drive the fixing nail 311 to rotate. The deceleration belt 309 is composed of a plurality of semicircular convex rings, which are fixedly mounted on the surface of the fixed plate 310 in a linear array with the same center. The diameters of the plurality of semicircular convex rings increase from the center to the outside, which has a deceleration effect on the movement of the sliding ball 308. The support plate 6 moves back and forth under the action of the reset spring 302 and the annular airbag 304, so that the support plate 6 is reset, and the support plate 6 swings back and forth under the action of the sliding ball 308. The deceleration belt 309 decelerates the movement of the sliding ball 308, so that the sliding ball 308 is quickly decelerated, which facilitates the calibration frame 1 to quickly stabilize after the swing, thereby accelerating the calibration efficiency of the calibration frame 1.

[0034] There are several reset springs 302, which are fixedly installed on the arc surface of the fixing rod 303 in a circular array, and cooperate with the annular airbag 304 to ensure that the support plate 6 is impacted and drives the calibration frame 1 as a whole to deviate, thereby buffering the impact force. Secondly, the reset spring 302 and the annular airbag 304 ensure that the support plate 6 is reset, and the end of the fixing rod 303 away from the fixing plate 310 is movably installed in the movable groove 301 to ensure that the support plate 6 can move on the surface of the fixing rod 303. A friction belt is provided on the lower surface of the fixing plate 310. The diameter of the nail hole 407 is adapted to the diameter of the fixing nail 311. There are several nail holes 407, and several The nail holes 407 are arranged in a circular array on the lower surface of the fixing plate 310 to ensure that multiple groups of fixing nails 311 can be accommodated, so that the fixing nails 311 can fix the fixing plate 310 on the ground at multiple angles, further ensuring the stability of the calibration frame 1, and allowing the fixing nails 311 to be protected inside the nail holes 407. When facing some smooth ground, the fixing plate 310 is better fixed to the ground through the friction belt, and the fixing nails 311 can be stored in the nail holes 407 for protection by adjusting the knob 401. For some uneven ground, the knob 401 can be adjusted to fix the fixing nails 311 on the ground, thereby ensuring the overall stability of the calibration frame 1 and facilitating the next step of calibrating the zenith instrument.

[0035] In the present invention, when in use, the calibration frame 1 is hit, and the reset spring 302 and the annular airbag 304 are deformed when the support plate 6 moves, thereby cushioning the impact of the calibration frame 1. At the same time, the sliding ball 308 cooperates with the support plate 6 to move. Under the action of the cylindrical block 307 and the tension spring 306, the sliding ball 308 contacts the deceleration belt 309 to decelerate, thereby preventing the calibration frame 1 from swinging back and forth and affecting the accuracy of the calibration frame 1. Secondly, the fixed plate 310 is fixed to some special terrain by the fixing pin 311, and the friction belt on the fixed plate 310 is fixed to a smooth terrain to ensure the overall stability of the support rod 2, so that the calibration frame 1 can calibrate the zenith instrument more stably and with better calibration accuracy.

[0036] Secondly, turn the knob 401 to move the threaded rod 402 and drive the adjustment ring 404 to move, so that the telescopic spring 405 is deformed to facilitate the movement of the fixing nail 311 on the circular ring 406 from the inside of the nail hole 407, and insert some soft soil to better fix the fixing nail 311. Faced with different soil types, adjust the knob 401 to make the threaded rod 402 continue to move downward to ensure that the fixing nail 311 is fixed to the appropriate position, thereby ensuring the stability of the calibration frame 1 and facilitating the subsequent calibration frame 1 to adjust the accuracy of the zenith telescope.

[0037] Furthermore, when the fixing nail 311 moves downward during the adjustment of the adjustment mechanism 4, the fixing nail 311 encounters some soil blocks that are difficult to insert. Under the action of the movable spring 503, the fixing nail 311 moves inside the mounting block 501, and the protrusion 505 on the fixing nail 311 moves inside the limiting groove 504, driving the fixing nail 311 to rotate, so that the fixing nail 311 can be better inserted into the ground to ensure that the fixing nail 311 is better fixed to the ground, thereby ensuring the stability of the calibration frame 1. After the calibration frame 1 is fixed, the zenith telescope is placed on the surface of the calibration frame 1, and the zenith telescope is calibrated to ensure the accuracy of the calibrated zenith telescope.

[0038] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A zenith telescope with a calibration structure, comprising a calibration frame (1), the lower surface of the calibration frame (1) being hinged to a support rod (2), and one end of the support rod (2) away from the calibration frame (1) being hinged to a support plate (6), characterized in that: A protection mechanism (3) is provided below the support plate (6), an adjustment mechanism (4) is provided below the support plate (6), and a promotion mechanism (5) is provided below the support plate (6), and the protection mechanism (3) comprises: A movable groove (301), wherein the movable groove (301) is provided on the lower surface of the support plate (6), an annular airbag (304) is fixedly mounted on the inner wall of the movable groove (301), a return spring (302) is fixedly connected to the inner wall of the movable groove (301), an end of the return spring (302) away from the movable groove (301) is fixedly connected to a fixed rod (303), and a lower surface of the fixed rod (303) is fixedly connected to a fixed plate (310); A through hole (305), wherein the through hole (305) is provided on the surface of the support plate (6), the inner wall of the through hole (305) is fixedly connected to a tension spring (306), one end of the tension spring (306) away from the inner wall of the through hole (305) is fixedly connected to a cylindrical block (307), a sliding ball (308) is movably mounted on the lower surface of the cylindrical block (307), a deceleration belt (309) is fixedly mounted on the upper surface of the fixed plate (310), and a fixing nail (311) is provided on the lower surface of the fixed plate (310).

2. The zenith telescope with a calibration structure according to claim 1, characterized in that: The adjustment mechanism (4) comprises a knob (401), wherein the knob (401) is movably mounted on the surface of the fixing plate (310), the inner wall of the knob (401) is threadedly connected to a threaded rod (402), an adjustment ring (404) is movably mounted on the lower surface of the threaded rod (402), a telescopic spring (405) is fixedly connected to the lower surface of the adjustment ring (404), one end of the telescopic spring (405) away from the adjustment ring (404) is fixedly connected to a circular ring (406), a nail hole (407) is provided on the lower surface of the fixing plate (310), and an adjustment slot (403) is provided inside the fixing plate (310).

3. The zenith telescope with a calibration structure according to claim 1, characterized in that: The promotion mechanism (5) comprises a mounting block (501), wherein the mounting block (501) is fixedly mounted on the lower surface of the circular ring (406), a movable groove (502) is provided on the surface of the mounting block (501), an inner wall of the movable groove (502) is fixedly connected to a movable spring (503), an end of the movable spring (503) away from the movable groove (502) is fixedly connected to a fixing pin (311), an arc surface of the fixing pin (311) fixes a mounting protrusion (505), and a limiting groove (504) is provided on the inner wall of the movable groove (502).

4. The zenith telescope with a calibration structure according to claim 2, characterized in that: The surface of the fixing plate (310) is provided with a circular hole, the diameter of the circular hole is matched to the diameter of the threaded rod (402), the number of the circular holes is three, and the three circular holes are provided in a circular array on the surface of the fixing plate (310).

5. The zenith telescope with a calibration structure according to claim 1, characterized in that: The maximum diameter of the annular airbag (304) matches the diameter of the movable groove (301), the minimum diameter of the annular airbag (304) matches the diameter of the fixed rod (303), and the annular airbag (304) is sleeved on the surface of the fixed rod (303).

6. The zenith telescope with a calibration structure according to claim 1, characterized in that: The diameter of the through hole (305) matches the diameter of the cylindrical block (307); a through groove is provided on the surface of the cylindrical block (307); and the shape of the through groove matches the shape of the sliding ball (308).

7. The zenith telescope with a calibration structure according to claim 2, characterized in that: The diameter of the adjustment groove (403) matches the diameter of the adjustment ring (404), and the diameter of the adjustment groove (403) matches the diameter of the circular ring (406).

8. The zenith telescope with a calibration structure according to claim 3, characterized in that: The diameter of the movable groove (502) is matched to the end diameter of the fixing pin (311); the protrusion (505) is circular; the shape of the protrusion (505) is matched to the shape of the limiting groove (504); the number of the protrusions (505) is two groups; the two groups of protrusions (505) are fixedly mounted on the arc surface of the fixing pin (311) in a circular array.

9. The zenith telescope with a calibration structure according to claim 1, characterized in that: The deceleration belt (309) is composed of a plurality of semicircular convex rings, and the plurality of semicircular convex rings are fixedly mounted on the surface of the fixed plate (310) in a linear array with the same center.

10. The zenith telescope with a calibration structure according to claim 1, characterized in that: The number of the return springs (302) is set to be a plurality, and the plurality of return springs (302) are fixedly mounted on the arc surface of the fixing rod (303) in a circular array.

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