Geodetic survey device with thermal imaging

Abstract

The invention relates to the technical field of geodetic measuring instruments, in particular to a geodetic measuring device with thermal imaging, which comprises a rotating mechanism, and a supporting mechanism is rotatably arranged on the rotating mechanism in a matched manner; a driving mechanism is arranged on the rotating mechanism; the driving mechanism is connected with the mounting mechanism in a matched mode. Two mounting plates are symmetrically fixed on the mounting mechanism; a fixing mechanism is connected to the mounting plate in a matched mode. A main body mechanism is fixed on the mounting mechanism in a matched manner; the supporting height of the supporting mechanism can be adjusted by rotating the supporting mechanism with hands, so that the placement height of the main body mechanism can be adjusted conveniently; the rotating driving mechanism drives the mounting mechanism to rotate when rotating in the rotating mechanism, so that the measurement direction of the main body mechanism can be adjusted conveniently; and when the fixing mechanism is pulled and rotated, the fixing mechanism can slide into the mounting plate from the interior of the mounting mechanism, so that an operator can mount and dismount the main body mechanism conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of geodetic instruments, in particular to a geodetic device with thermal imaging. Background Art

[0002] Geodesy, a combined precision instrument for surface measurement. It consists of a theodolite, a total station, a GPS, a sighting card and a laser plummet. Existing geodetic instruments can be used for various types of surveys, such as setting out at construction sites.

[0003] However, when using a geodetic instrument equipped with a thermal imaging camera, operators need to adjust the position of the instrument. Generally, geodetic instruments support the instrument through a mounting bracket. When adjusting the angle of the instrument, the mounting bracket needs to be moved together, which is troublesome to operate. When the bracket is moved, the original position of the instrument is prone to deviation, which is not conducive to improving the accuracy of the measurement of the measuring instrument. The measuring instrument is fixed to the mounting bracket by bolts. Although the stability of the instrument during use can be improved, when it needs to be disassembled or repaired, it is necessary to use tools to remove it from the bracket first, which is inconvenient to take, which is not conducive to the use efficiency of the instrument. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a geodetic measuring device carrying thermal imaging.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a geodetic measuring device with thermal imaging, comprising a rotating mechanism, on which a supporting mechanism is rotated in cooperation; a driving mechanism is provided on the rotating mechanism; the driving mechanism is connected with a mounting mechanism; two mounting plates are symmetrically fixed on the mounting mechanism; a fixing mechanism is connected with the mounting plate; a main body mechanism is fixed with the mounting mechanism;

[0006] The fixing mechanism includes a fixing rod, a fixing rod is fixedly connected to the mounting plate, a connecting rod is slidably connected to the fixing rod, the end of the connecting rod is arranged in an inclined surface, a telescopic spring is sleeved on the connecting rod, and the connecting rod is cooperated with the fixing rod through the telescopic spring, the connecting rod is fixedly connected to the rotating rod, the rotating rod is in contact with the fixing rod, and the rotating rod is rotatably connected to the mounting plate, the fixing mechanism also includes a slide groove, a slide groove is provided on the mounting plate, and the rotating rod and the connecting rod are slidably cooperated with the slide groove.

[0007] Specifically, the mounting mechanism includes a turntable, the mounting plate is fixedly connected to the turntable, a chuck is mounted on the turntable, two positioning grooves are symmetrically provided on the chuck, and the mounting mechanism also includes a rubber pad, the turntable is bonded with a rubber pad, and the rubber pad is in contact with the chuck.

[0008] Specifically, the main body mechanism includes a connecting block, the connecting block is mounted on the chuck, the connecting block is fixedly connected to the mounting seat, and the measuring instrument body is fixed on the mounting seat.

[0009] Specifically, the driving mechanism includes a rotating shaft, the rotating disc is fixedly connected to the rotating shaft, a worm wheel is fixedly mounted on the rotating shaft, a worm is meshed on the worm wheel, and the worm is fixedly connected to the rotating block.

[0010] Specifically, the rotating mechanism includes a support block, the worm gear is rotationally connected to the support block, the support block is fixedly connected to a chassis, a plurality of protrusions are fixedly installed on the support block in a ring shape at equal intervals, the installation mechanism also includes balls, a plurality of balls are rotationally cooperated and equidistantly installed on the turntable in a ring shape, and the balls are rollingly connected to the chassis.

[0011] Specifically, the support mechanism includes a connecting shaft, the protrusion is rotatably connected to the connecting shaft, the connecting shaft is fixedly installed with a support rod, the support rod is fixedly connected to a plurality of fixed blocks, the support mechanism also includes a limit block, the support rod and the limit block are fixedly connected, the limit block is threadedly connected with a support rod, and the end of the support rod is an inverted cone structure.

[0012] The beneficial effects of the present invention are:

[0013] (1) The geodetic measuring device with thermal imaging described in the present invention can adjust the support height by manually rotating the support mechanism, thereby facilitating the adjustment of the placement height of the main mechanism, that is, when fixing the geodetic measuring instrument, the operator can first manually rotate the rod sleeve provided on the support rod, and since the support rod is threadedly connected to the limit block fixed on the support rod, the support rod is rotated to rotate within the limit block, thereby facilitating the adjustment of the height of the support rod, and the end of the support rod is arranged in an inverted cone structure, a fixed block is fixedly installed on the support rod, and a connecting shaft is fixed on the support rod. When the connecting shaft rotates along the protrusion fixed on the support block, the expansion angle of the support rod can be adjusted, thereby facilitating the adjustment of the support rod support angle according to the height of the terrain, thereby facilitating the support rod and the support rod to stably support the support block while also facilitating the adjustment of the height of the measuring instrument body.

[0014] (2) The geodetic measuring device with thermal imaging described in the present invention has a rotating driving mechanism, which drives the installation mechanism to rotate when it rotates in the rotating mechanism, thereby facilitating the adjustment of the measuring orientation of the main mechanism, namely: a worm is rotatably connected to the support block, and the end of the worm is fixedly connected to the rotating block. When the operator rotates the rotating block by hand, the rotating block can drive the worm to rotate in the support block. A worm wheel is meshed on the worm, and the worm wheel is fixedly connected to the rotating shaft. When the worm drives the worm wheel to rotate, the worm wheel can drive the rotating shaft to rotate. A rotating shaft is fixedly installed with a rotating wheel. The turntable has a plurality of balls which are equidistantly rotated in an annular shape. When the rotating shaft drives the turntable to rotate, the balls can rotate along the chassis. The chassis and the support block are fixedly connected. The arrangement of the balls can also improve the rotation effect of the turntable. A chuck is mounted on the turntable. The connecting block fixed on the mounting seat is connected with the chuck by bolts. The measuring instrument body is fixed on the mounting seat. When the rotating shaft drives the turntable to rotate, the chuck can drive the mounting seat to rotate, thereby facilitating the adjustment of the placement orientation of the measuring instrument body, thereby improving the use efficiency of the measuring instrument body.

[0015] (3) The geodetic measuring device with thermal imaging described in the present invention can slide the fixing mechanism from the mounting mechanism to the mounting plate when the fixing mechanism is pulled and rotated, thereby facilitating the operator to install and disassemble the main mechanism. That is, when the measuring instrument body needs to be taken down, the operator can pull and rotate the rotating rod by hand. The rotating rod is fixedly connected to the connecting rod. The rotating rod is engaged with the fixing rod fixed in the mounting plate. A telescopic spring is sleeved on the connecting rod. The connecting rod is connected to the fixing rod through the telescopic spring. When the rotating rod drives the connecting rod to move, the end of the connecting rod can slide from the positioning groove provided in the chuck to the mounting plate, thereby causing the connecting rod to squeeze the telescopic spring during the sliding process. The sliding of the connecting rod separates the rotating rod from the fixing rod. The rotating rod is rotated and loosened, thereby causing the end of the rotating rod to contact the end of the fixing rod during the sliding process, thereby causing the end of the connecting rod to be inside the mounting plate. This makes it convenient for the operator to take the chuck out of the rotating disk and also to take down the measuring instrument body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of a geodetic measuring device with thermal imaging provided by the present invention;

[0018] Figure 2 for Figure 1 An enlarged schematic diagram of the structure of section A is shown;

[0019] Figure 3 for Figure 1 An enlarged schematic diagram of the structure of part B is shown;

[0020] Figure 4 for Figure 1 An enlarged schematic diagram of the C-section structure is shown;

[0021] Figure 5 It is a schematic diagram of the connection structure between the rotating rod and the mounting plate of the present invention;

[0022] Figure 6 for Figure 5 An enlarged schematic diagram of the D-section structure is shown;

[0023] Figure 7 for Figure 5 An enlarged schematic diagram of the structure of part E is shown;

[0024] Figure 8 It is a schematic diagram of the connection structure between the rotating shaft and the supporting block of the present invention.

[0025] In the figure: 1. main mechanism; 101. measuring instrument body; 102. mounting seat; 103. connecting block; 2. supporting mechanism; 201. supporting rod; 202. fixing block; 203. limiting block; 204. resisting rod; 205. connecting shaft; 3. driving mechanism; 301. rotating block; 302. worm; 303. worm wheel; 304. rotating shaft; 4. fixing mechanism; 401. rotating rod; 402. connecting rod; 403. slide groove; 404. fixing rod; 405. telescopic spring; 5. mounting mechanism; 501. chuck; 502. rotating disk; 503. rubber pad; 504. positioning groove; 505. ball bearing; 6. mounting plate; 7. rotating mechanism; 701. chassis; 702. supporting block; 703. convex block. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0027] like Figure 1-Figure 8 As shown, a geodetic measuring device with thermal imaging according to the present invention comprises a rotating mechanism 7, on which a supporting mechanism 2 is rotated in cooperation; a driving mechanism 3 is provided on the rotating mechanism 7; the driving mechanism 3 is connected in cooperation with a mounting mechanism 5; two mounting plates 6 are symmetrically fixed on the mounting mechanism 5; a fixing mechanism 4 is connected in cooperation with the mounting plate 6; and a main body mechanism 1 is fixed in cooperation with the mounting mechanism 5;

[0028] The fixing mechanism 4 includes a fixing rod 404, a fixing rod 404 is fixedly connected to the mounting plate 6, a connecting rod 402 is slidably connected to the fixing rod 404, an end of the connecting rod 402 is arranged in an inclined surface, a telescopic spring 405 is sleeved on the connecting rod 402, and the connecting rod 402 is cooperated with the fixing rod 404 through the telescopic spring 405, the connecting rod 402 is fixedly connected to the rotating rod 401, the rotating rod 401 is in conflict with the fixing rod 404, and the rotating rod 401 is rotatably connected to the mounting plate 6, the fixing mechanism 4 also includes a sliding groove 403, the mounting plate 6 is provided with a sliding groove 403, the rotating rod 401 and the connecting rod 402 are slidably cooperated, when the fixing mechanism 4 is pulled and rotated, it can slide from the mounting mechanism 5 into the mounting plate 6, so as to facilitate the operator to install and disassemble the main mechanism 1, that is: when the measuring instrument body 101 needs to be taken down, the operator can use Pull and rotate the rotating rod 401 by hand, the rotating rod 401 is fixedly connected with the connecting rod 402, and the rotating rod 401 is engaged with the fixed rod 404 fixed in the mounting plate 6. A telescopic spring 405 is sleeved on the connecting rod 402, and the connecting rod 402 is connected with the fixed rod 404 through the telescopic spring 405. When the rotating rod 401 drives the connecting rod 402 to move, the end of the connecting rod 402 can slide from the positioning groove 504 provided in the chuck 501 to the mounting plate 6. As a result, the connecting rod 402 squeezes the telescopic spring 405 during the sliding process, and the connecting rod 402 slides to separate the rotating rod 401 from the fixed rod 404. The rotating rod 401 is rotated and released, so that the end of the rotating rod 401 contacts the end of the fixed rod 404 during the sliding process, and the end of the connecting rod 402 is located inside the mounting plate 6, so that the operator can take out the chuck 501 from the turntable 502 and the measuring instrument body 101 can be taken down at the same time.

[0029] Specifically, the mounting mechanism 5 includes a turntable 502, the mounting plate 6 is fixedly connected to the turntable 502, a chuck 501 is mounted on the turntable 502, two positioning grooves 504 are symmetrically provided on the chuck 501, and the mounting mechanism 5 also includes a rubber pad 503, the turntable 502 is bonded with a rubber pad 503, and the rubber pad 503 is in conflict with the chuck 501.

[0030] Specifically, the main body mechanism 1 includes a connecting block 103 , the connecting block 103 is mounted on the chuck 501 , the connecting block 103 is fixedly connected to the mounting seat 102 , and the measuring instrument body 101 is fixed on the mounting seat 102 .

[0031] Specifically, the driving mechanism 3 includes a rotating shaft 304, the rotating disk 502 is fixedly connected to the rotating shaft 304, a worm wheel 303 is fixedly installed on the rotating shaft 304, a worm 302 is meshed on the worm wheel 303, the worm 302 is fixedly connected to the rotating block 301, and the rotating driving mechanism 3 is rotated so that when it rotates in the rotating mechanism 7, it drives the mounting mechanism 5 to rotate, thereby facilitating the adjustment of the measuring orientation of the main mechanism 1, that is, the worm 302 is rotatably connected to the supporting block 702, and the end of the worm 302 is fixedly connected to the rotating block 301. When the operator rotates the rotating block 301 by hand, the rotating block 301 can drive the worm 302 to rotate in the supporting block 702, the worm 302 is meshed with a worm wheel 303, and the worm wheel 303 is fixedly connected to the rotating shaft 304. When the worm 302 drives the worm wheel 303 to rotate, The worm gear 303 drives the rotating shaft 304 to rotate. A rotating disk 502 is fixedly installed on the rotating shaft 304. A plurality of balls 505 are equidistantly rotated in an annular shape on the rotating disk 502. When the rotating shaft 304 drives the rotating disk 502 to rotate, the balls 505 can rotate along the chassis 701. The chassis 701 is fixedly connected to the supporting block 702. The arrangement of the balls 505 can also improve the rotation effect of the rotating disk 502. A chuck 501 is mounted on the rotating disk 502. The connecting block 103 fixed on the mounting seat 102 is connected with the chuck 501 by bolts. The measuring instrument body 101 is fixed on the mounting seat 102. When the rotating shaft 304 drives the rotating disk 502 to rotate, the chuck 501 can drive the mounting seat 102 to rotate, thereby facilitating the adjustment of the placement orientation of the measuring instrument body 101, thereby facilitating the improvement of the use efficiency of the measuring instrument body 101.

[0032] Specifically, the rotating mechanism 7 includes a support block 702, the worm 302 is rotationally connected to the support block 702, the support block 702 is fixedly connected to a chassis 701, a plurality of protrusions 703 are fixedly installed in a ring shape at equal intervals on the support block 702, the mounting mechanism 5 also includes a ball 505, a plurality of ball 505 are rotatably cooperated and equidistantly installed on the turntable 502 in a ring shape, and the ball 505 is rollingly connected to the chassis 701.

[0033] Specifically, the support mechanism 2 includes a connecting shaft 205, the convex block 703 is rotatably connected with the connecting shaft 205, the connecting shaft 205 is fixedly installed with a support rod 201, the support rod 201 is fixedly connected with a plurality of fixing blocks 202, the support mechanism 2 also includes a limit block 203, the support rod 201 is fixedly connected to the limit block 203, the limit block 203 is threadedly connected with a support rod 204, the end of the support rod 204 is an inverted cone structure, the support height of the support mechanism 2 can be adjusted by rotating the support mechanism 2 by hand, and then the placement height of the main mechanism 1 can be adjusted, that is, when the operator fixes the geodetic instrument, he can first rotate the rod sleeve provided on the support rod 204 by hand, because the support rod 2 04 is threadedly connected with the limit block 203 fixed on the support rod 201, and the support rod 204 is rotated to make it rotate in the limit block 203, so as to facilitate the adjustment of the height of the support rod 204, and the end of the support rod 204 is arranged in an inverted cone structure, and a fixed block 202 is fixedly installed on the support rod 201, and a connecting shaft 205 is fixed on the support rod 201. When the connecting shaft 205 rotates along the protrusion 703 fixed on the support block 702, the expansion angle of the support rod 201 can be adjusted, so as to facilitate the adjustment of the support rod 201 The angle of the support rod 201 is adjusted according to the height of the terrain, so that the support rod 201 and the support rod 204 can stably support the support block 702 while also facilitating the adjustment of the height of the measuring instrument body 101.

[0034] When the present invention is in use, first, when fixing the geodetic instrument, the operator can first manually rotate the rod sleeve arranged on the supporting rod 204. Since the supporting rod 204 is threadedly connected with the limit block 203 fixed on the support rod 201, the supporting rod 204 is rotated to make it rotate in the limit block 203, so as to facilitate the adjustment of the height of the supporting rod 204. The end of the supporting rod 204 is arranged in an inverted cone structure. The supporting rod 201 is fixedly mounted with a fixing block 202, and the supporting rod 201 is fixed with a connecting shaft 205. When the connecting shaft 205 rotates along the protrusion 703 fixed on the supporting block 702, the expansion angle of the supporting rod 201 can be adjusted, so as to facilitate the adjustment of the support rod 201 expansion angle according to the height of the terrain, so as to facilitate the support rod 201 and the supporting rod 204 to stably support the supporting block 702 and also facilitate the adjustment of the height of the measuring instrument body 101.

[0035] A worm 302 is rotatably connected to the support block 702, and the end of the worm 302 is fixedly connected to the rotating block 301. When the operator rotates the rotating block 301 by hand, the rotating block 301 can drive the worm 302 to rotate in the support block 702. A worm wheel 303 is meshed on the worm 302, and the worm wheel 303 is fixedly connected to the rotating shaft 304. When the worm 302 drives the worm wheel 303 to rotate, the worm wheel 303 can drive the rotating shaft 304 to rotate. A turntable 502 is fixedly installed on the rotating shaft 304, and a plurality of balls 505 are rotatably arranged in an annular shape at equal intervals on the turntable 502. When the rotating shaft 304 drives the turntable 502 to rotate, The ball bearing 505 can be made to rotate along the chassis 701, and the chassis 701 is fixedly connected to the support block 702. The arrangement of the ball bearing 505 can also improve the rotation effect of the turntable 502. The turntable 502 is mounted with a chuck 501, and the connection block 103 fixed on the mounting seat 102 is connected with the chuck 501 by bolts. The measuring instrument body 101 is fixed on the mounting seat 102. When the rotating shaft 304 drives the turntable 502 to rotate, the chuck 501 can drive the mounting seat 102 to rotate, thereby facilitating the adjustment of the placement orientation of the measuring instrument body 101, thereby facilitating the improvement of the use efficiency of the measuring instrument body 101.

[0036] When the measuring instrument body 101 needs to be taken down, the operator can pull and rotate the rotating rod 401 by hand. The rotating rod 401 is fixedly connected to the connecting rod 402. The rotating rod 401 is engaged with the fixed rod 404 fixed in the mounting plate 6. A telescopic spring 405 is sleeved on the connecting rod 402. The connecting rod 402 is connected to the fixed rod 404 through the telescopic spring 405. When the rotating rod 401 drives the connecting rod 402 to move, the end of the connecting rod 402 can be moved from the positioning groove 504 provided in the chuck 501. 4 slides into the mounting plate 6, so that the connecting rod 402 squeezes the telescopic spring 405 during the sliding process, and the connecting rod 402 slides to separate the rotating rod 401 from the fixed rod 404. The rotating rod 401 is rotated and released, so that the end of the rotating rod 401 can be in contact with the end of the fixed rod 404 during the sliding, so that the end of the connecting rod 402 is located inside the mounting plate 6, so that the operator can take out the chuck 501 from the rotating disk 502 and the measuring instrument body 101 can also be taken down.

[0037] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A geodetic measuring device with thermal imaging, characterized in that: The invention comprises a rotating mechanism (7), wherein a supporting mechanism (2) is rotatably mounted on the rotating mechanism (7); a driving mechanism (3) is arranged on the rotating mechanism (7); the driving mechanism (3) is symmetrically connected to a mounting mechanism (5); two mounting plates (6) are symmetrically fixed on the mounting mechanism (5); a fixing mechanism (4) is symmetrically connected to the mounting plate (6); and a main body mechanism (1) is symmetrically fixed to the mounting mechanism (5); The fixing mechanism (4) comprises a fixing rod (404), the fixing rod (404) is fixedly connected to the mounting plate (6), the fixing rod (404) is slidably connected to a connecting rod (402), the end of the connecting rod (402) is arranged in an inclined surface, a telescopic spring (405) is sleeved on the connecting rod (402), and the connecting rod (402) is matched and connected to the fixing rod (404) through the telescopic spring (405), the connecting rod (402) is fixedly connected to a rotating rod (401), the rotating rod (401) is in contact with the fixing rod (404), and the rotating rod (401) is rotationally connected to the mounting plate (6).

2. The geodetic measuring device with thermal imaging according to claim 1, characterized in that: The fixing mechanism (4) further comprises a slide groove (403), the mounting plate (6) is provided with the slide groove (403), and the slide groove (403) is slidably matched with a rotating rod (401) and a connecting rod (402).

3. The geodetic measuring device with thermal imaging according to claim 2, characterized in that: The mounting mechanism (5) comprises a rotating disk (502), the mounting plate (6) is fixedly connected to the rotating disk (502), a chuck (501) is mounted on the rotating disk (502), and two positioning grooves (504) are symmetrically provided on the chuck (501).

4. The geodetic measuring device with thermal imaging according to claim 3, characterized in that: The mounting mechanism (5) further comprises a rubber pad (503), the rubber pad (503) being bonded to the rotating disk (502), and the rubber pad (503) being in contact with the chuck (501).

5. The geodetic measuring device with thermal imaging according to claim 3, characterized in that: The main body mechanism (1) comprises a connecting block (103), the connecting block (103) is mounted on the chuck (501), the connecting block (103) is fixedly connected to a mounting seat (102), and the measuring instrument body (101) is fixedly mounted on the mounting seat (102).

6. The geodetic measuring device with thermal imaging according to claim 3, characterized in that: The driving mechanism (3) comprises a rotating shaft (304), the rotating disk (502) and the rotating shaft (304) are fixedly connected, a worm wheel (303) is fixedly mounted on the rotating shaft (304), a worm (302) is meshed on the worm wheel (303), and the worm (302) and the rotating block (301) are fixedly connected.

7. The geodetic measuring device with thermal imaging according to claim 6, characterized in that: The rotating mechanism (7) comprises a supporting block (702), the worm (302) and the supporting block (702) are rotatably connected, the supporting block (702) is fixedly connected to a chassis (701), and a plurality of protrusions (703) are fixedly mounted in an annular shape at equal intervals on the supporting block (702).

8. The geodetic measuring device with thermal imaging according to claim 7, characterized in that: The mounting mechanism (5) further comprises balls (505), and a plurality of balls (505) are equidistantly arranged on the rotating disk (502) to rotate in a ring shape, and the balls (505) are connected to the chassis (701) in a rolling manner.

9. The geodetic measuring device with thermal imaging according to claim 7, characterized in that: The support mechanism (2) comprises a connecting shaft (205), the protrusion (703) is rotatably connected to the connecting shaft (205), a support rod (201) is fixedly mounted on the connecting shaft (205), and a plurality of fixed blocks (202) are fixedly connected to the support rod (201).

10. The geodetic measuring device with thermal imaging according to claim 9, characterized in that: The support mechanism (2) further comprises a limit block (203), the support rod (201) and the limit block (203) are fixedly connected, a support rod (204) is threadedly connected to the limit block (203), and the end of the support rod (204) is in an inverted cone structure.

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