Point fixing device for land survey

Abstract

The invention relates to the technical field of land survey, in particular to a land survey point fixing device which comprises a movable base, a supporting frame, an obliquely-arranged material storage frame, a lifting air cylinder, a rotating mechanism, a downward pressing mechanism and four clamping assemblies. A multipoint rod is stored in the storage frame, and an L-shaped sliding rail is arranged at the bottom of the storage frame. A lifting cylinder drives a lifting block I and a lifting block II to link two sets of ratchet mechanisms through a lifting plate; the lifting block I drives a rotating mechanism to rotate by 90 degrees in one direction, so that a no-load clamping assembly rotates to a material receiving position; the second lifting block drives a cross-shaped discharging rod in the storage frame to rotate by 90 degrees in the single direction, and the single fixed point rod is poked to fall into the L-shaped sliding rail. The fixed point rod slides downwards along the inclined sliding rail by means of gravity and is automatically clamped between the clamping rods through an inclined face guide structure on the clamping assembly to be locked. And the downward pressing mechanism presses the clamped fixed point rod into the ground. Automatic feeding and precise positioning of the fixed-point rod and automatic resetting of the clamping mechanism after driving are achieved, the operation efficiency is greatly improved, and the labor burden is relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of land surveying, in particular to a point-fixing device for land surveying. Background Art

[0002] Land property surveying is an essential component of land management, encompassing the definition of land boundaries, the calculation of land area, and the confirmation of land use and ownership rights. This surveying and mapping work is crucial for safeguarding the legitimacy of land rights, clearly defining land boundaries, and effectively resolving land disputes. Land surveying requires marking and determining measurement points on the ground, often accomplished by establishing stakes on the land to facilitate subsequent surveying operations.

[0003] In traditional land management surveying, fixed-point operations generally rely on manual labor to pick up fixed-point poles. Since surveying tasks often involve a large number of fixed-point requirements, this method is not only extremely labor-intensive but also inefficient. In contrast, the fixed-point devices currently available on the market for land title confirmation and measurement have reduced the burden of manual labor in directly picking up fixed-point poles to a certain extent, but in actual use, operators are still required to manually install the fixed-point poles one by one on the turntable. This step not only increases the complexity of the installation of the fixed-point poles, making the entire operation process cumbersome, but also the storage capacity of the fixed-point poles stored on the turntable is relatively limited, which cannot meet the needs of large-scale surveying operations, thereby weakening the effectiveness and convenience of the fixed-point device to a certain extent. Summary of the Invention

[0004] In order to solve the defects of the prior art, the present invention provides a land surveying fixed-point device, which realizes automatic loading of fixed-point rods, improves work efficiency and reduces the workload of staff.

[0005] The technical solution adopted by the present invention is as follows: it includes a movable base, a support frame, a storage frame, a lifting cylinder, a rotating mechanism, a pressing mechanism and four clamping assemblies, wherein a fixed rod is provided in the storage frame, a lifting plate is provided at the output end of the lifting cylinder, a lifting block is provided at the bottom of one side of the lifting plate, the lifting block is slidably connected to the inside of the fixed frame, a rack is provided on the lifting block, a rotating shaft connected to the rotation of the fixed frame is provided, a driven gear is provided on one side of the rotating shaft located inside the fixed frame, the rack is meshed with the driven gear, a ratchet is provided on one side of the rotating shaft located outside the fixed frame, a fixed frame is provided on the base, a connecting column is rotatably connected to the fixed frame, a rotating disk is provided on the connecting column, and the rotating disk A pawl for rotation is provided, the pawl is meshed with the ratchet, a transmission mechanism is provided between the connecting column and the rotating mechanism, a lifting block 2 is provided above the side of the lifting plate away from the lifting block 1, a rack 2 is provided on the lifting block 2, a fixed frame 2 is provided on the storage frame, a rotating shaft 2 is rotatably connected to the fixed frame 2, a driven gear 2 is provided on the rotating shaft 2, the rack 2 is meshed with the driven gear 2, a ratchet 2 is provided on the rotating shaft 2, a rotatably connected unloading shaft is provided in the storage frame, one end of the unloading shaft passes through the storage frame and is provided with a rotating disk 2, a rotatably connected pawl is provided on the rotating disk 2, the pawl 2 is meshed with the ratchet 2, a number of unloading rods are provided on the unloading shaft, and the unloading rods are a cross-shaped structure.

[0006] Preferably, the rotating mechanism includes a rotating base and a mounting seat, the rotating base is rotatably connected to the base, the mounting seat is provided with four circumferentially equidistant sliding grooves, each of the sliding grooves is provided with a return spring, and the four clamping components are respectively slidably connected in the four sliding grooves.

[0007] Preferably, the transmission mechanism includes a transmission shaft, bevel gear 1, bevel gear 2, two transmission gears and a transmission belt. The transmission shaft is rotatably connected to the base, the bevel gear 1 is set on the connecting column, the bevel gear 2 is set on the transmission shaft, the bevel gear 1 is meshed with the bevel gear 2, the two transmission gears are respectively set on the transmission shaft and the rotating base, and the two transmission gears are connected by a transmission belt.

[0008] Preferably, the clamping assembly includes a slider, a U-shaped plate, two clamping springs, two movable blocks, four guide rods and two clamping rods. The slider is connected to the bottom of the slide groove through a reset spring. The U-shaped plate and the slider are vertically connected. Two guide rods are passed through both sides of the U-shaped plate. A movable block is provided on one side of the guide rod located inside the U-shaped plate. The two movable blocks are connected to the U-shaped plate through clamping springs. Clamping rods are provided on the two movable blocks. The two clamping rods cooperate to form a square space for clamping the fixed-point rod.

[0009] Preferably, the material storage frame is tiltedly arranged on the support frame, a limit block is arranged in the material storage frame, an inclined L-shaped slide rail is arranged on one side of the material storage frame, and the clamping rod is provided with a connecting rail that matches the L-shaped slide rail.

[0010] Preferably, the fixed rod includes a rod body and a limiting circle block, the bottom of the rod body is conical, the limiting circle block is arranged at the top of the rod body, the radius of the limiting circle block is slightly larger than the radius of the rod body, the spatial structure inside the storage frame matches the shape of the fixed rod, and the rod body cooperates with two clamping rods to form a square space for clamping the fixed rod, so that the clamping rod fixes the position of the fixed rod; the rod body is tangent to the inner side of the L-shaped slide rail, and the fixed rod slides in the slide rail through the rod body, the limiting circle block and the L-shaped slide rail; the two clamping rods are provided with an inwardly inclined inclined surface structure on the side close to the connecting rail, so that when the fixed rod slides from the connecting rail to hit the fixed rod, the clamping rod moves to both sides so that the fixed rod enters between the two clamping rods, and the clamping rod is reset by the clamping spring, thereby fixing the fixed rod between the clamping rods.

[0011] Preferably, the pressing mechanism includes a gantry, a pressing cylinder and a pressing plate, the pressing cylinder is arranged on the gantry, and the pressing plate is arranged at the output end of the pressing cylinder.

[0012] Preferably, a fixed through hole is provided on the base, and reset blocks are provided on both sides of the fixed through hole. The top of the reset block and the bottom of the movable block are provided with opposite inclined structures, and the inclined structure at the top of the reset block cooperates with the inclined structure at the bottom of the movable block.

[0013] Preferably, the initial state of the lifting cylinder is in the pushing state. When the fixed rod in the clamping mechanism located below the pressing mechanism needs to be supplemented, the lifting cylinder is reset and pushed out again, and the rotating mechanism rotates ninety degrees so that the connecting rail of the clamping rod on the clamping mechanism located below the pressing mechanism is docked with the L-shaped slide rail. At the same time, the unloading rod in the storage frame rotates ninety degrees to move a fixed rod in the storage frame into the L-shaped slide rail; since the L-shaped slide rail is inclined and the rod body is tangent to the inner side of the L-shaped slide rail, the fixed rod naturally falls when it falls into the L-shaped slide rail, and slides on the L-shaped slide rail through the limit circle, and then slides downward through the L-shaped slide rail and the connecting rail of the clamping rod on the corresponding clamping assembly, and slides into the space between the two clamping rods by gravity and is clamped and fixed.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By setting up a lifting cylinder, a lifting plate, a rotating mechanism, a blanking rod, two ratchets, and a pawl, the blanking rod and the rotating mechanism can respectively complete a 90-degree one-way rotation during the lifting process of the lifting plate. By setting an L-shaped slide rail to cooperate with the connecting rail on the clamping rod, the fixed-point rod is fixed by the gravity of its fall, without the need for an additional drive source.

[0016] 2. When the downward pressure mechanism drives the fixed rod into the ground, the inclined surface structure on the movable block cooperates with the inclined surface structure on the reset block to move the movable block to both sides, thereby moving the clamping rod to both sides and no longer clamping the fixed rod. Then, when the downward pressure mechanism is reset, the clamping assembly is automatically reset by the reset spring and the clamping spring, thereby improving the functionality of the equipment.

[0017] 3. After the fixed rod is driven into the ground, the resetting of the clamping mechanism and the loading process of the fixed rod do not require manual operation by the staff, which improves work efficiency and reduces the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the pressing mechanism and the rotating mechanism;

[0021] Figure 3 Schematic diagram of the internal structure of the fixed frame;

[0022] Figure 4 for Figure 3 A schematic diagram of the structure of part A in the middle;

[0023] Figure 5 This is a schematic diagram of the structure of the transmission gear and transmission belt at the bottom of the base;

[0024] Figure 6 It is a schematic diagram of the structure of the lifting block at two locations;

[0025] Figure 7 for Figure 6 A magnified schematic diagram of the structure of part B;

[0026] Figure 8 Schematic diagram of the bottom structure of the storage frame;

[0027] Figure 9 Schematic diagram of the fixed rod structure;

[0028] Figure 10 Schematic diagram of the coordination structure of the rotating mechanism and the clamping assembly.

[0029] Figure: 1. Base; 2. Support frame; 3. Storage frame; 4. Lifting cylinder; 5. Fixed rod; 51. Rod body; 52. Stopper; 61. Rotating base; 62. Mounting base; 63. Slide; 64. Return spring; 71. Gantry; 72. Pressing cylinder; 73. Pressing plate; 81. Slider; 82. U-shaped plate; 83. Clamping spring; 84. Movable block; 85. Guide rod; 86. Clamping rod; 87. Connecting rail; 91. Transmission shaft; 92. Bevel gear 1; 93. Bevel gear 2; 94. Transmission gear; 95. Transmission belt; 10. Lifting plate; 11. Lifting block 1; 12. Fixed frame; 13. Rack 1; 14. Rotating shaft 1; 15. Driven gear 1; 16. Ratchet 1; 17. Fixed frame 1; 18. Connecting column; 19. Rotating disk 1; 20. Ratchet 1; 21. Lifting block 2; 22. Rack 2; 23. Fixed frame 2; 24. Rotating shaft 2; 25. Driven gear 2; 26. Ratchet 2; 27. Unloading shaft; 28. Rotating disk 2; 29. ​​Ratchet 2; 30. Unloading rod; 31. Limit block; 32. L-shaped slide rail; 33. Fixed point through hole; 34. Reset block. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0031] A land surveying fixed point device comprises a movable base 1, a support frame 2, a material storage frame 3, a lifting cylinder 4, a rotating mechanism, a pressing mechanism and four clamping components, wherein a fixed point rod 5 is provided in the material storage frame 3, a lifting plate 10 is provided at the output end of the lifting cylinder 4, a lifting block 11 is provided at the bottom of one side of the lifting plate 10, the lifting block 11 is slidably connected to the inside of a fixed frame 12, a rack 13 is provided on the lifting block 11, a rotating shaft 14 connected in rotation is provided on the fixed frame 12, a driven gear 15 is provided on one side of the rotating shaft 14 located inside the fixed frame 12, the rack 13 is meshed with the driven gear 15, a ratchet 16 is provided on one side of the rotating shaft 14 located outside the fixed frame 12, a fixing frame 17 is provided on the base 1, a connecting column 18 is rotatably connected to the fixing frame 17, a rotating disk 19 is provided on the connecting column 18, and a rotating disk 19 is provided on the rotating disk 19. A pawl 20 is rotatably connected, and the pawl 20 is meshed with the ratchet 16. A transmission mechanism is provided between the connecting column 18 and the rotating mechanism. A lifting block 21 is provided on the upper side of the lifting plate 10 away from the lifting block 11. A rack 22 is provided on the lifting block 21. A fixing frame 23 is provided on the storage frame 3. A rotating shaft 24 is rotatably connected to the fixing frame 23. A driven gear 25 is provided on the rotating shaft 24. The second gear 22 is meshed with the second driven gear 25, and the second ratchet 26 is provided on the second rotating shaft 24. A rotatably connected unloading shaft 27 is provided in the storage frame 3. One end of the unloading shaft 27 passes through the storage frame 3 and is provided with a second rotating disk 28. A rotatably connected pawl 29 is provided on the second rotating disk 28. The pawl 29 is meshed with the second ratchet 26, and a plurality of unloading rods 30 are provided on the unloading shaft 27. The unloading rods 30 are a cross-shaped structure. Initially, the lifting cylinder 4 is in its pushed-out state. When the lifting cylinder 4 resets and the lifting plate 10 moves downward, the rack 13 on the lifting block 11 drives the driven gear 15 and ratchet 16 to rotate. Ratchet 16 and pawl 1 20 then cooperate to drive the rotating disk 19, which in turn, through the transmission mechanism, drives the rotating mechanism to rotate 90 degrees, allowing the clamping mechanism to be loaded to the loading position. Simultaneously, the rack 22 on the lifting block 21 drives the driven gear 25 and ratchet 26 to rotate. Ratchet 2 26 and pawl 2 29 then cooperate to drive the rotating disk 2 28, which in turn drives the unloading rod 30 on the unloading shaft 27 to rotate 90 degrees, moving a fixed rod 5 downward to complete the unloading process. When the lifting cylinder 4 is pushed out again, the rotating disks 19 and 28 cease rotating.

[0032] Among them, the rotating mechanism includes a rotating base 61 and a mounting base 62. The rotating base 61 is rotatably connected to the base 1. The mounting base 62 is provided with four circumferentially equidistant sliding grooves 63. The sliding grooves 63 are each provided with a return spring 64. The four clamping components are respectively slidably connected in the four sliding grooves 63.

[0033] The transmission mechanism includes a transmission shaft 91, bevel gear 1 92, bevel gear 2 93, two transmission gears 94, and a transmission belt 95. The transmission shaft 91 is rotatably connected to the base 1. The bevel gear 1 92 is disposed on the connecting column 18. The bevel gear 2 93 is disposed on the transmission shaft 91. The bevel gear 1 92 and the bevel gear 2 93 are meshed and connected. The two transmission gears 94 are disposed on the transmission shaft 91 and the rotating base 61, respectively. The two transmission gears 94 are connected to each other via a transmission belt 95. When the bevel gear 1 92 rotates, the bevel gear 2 93 meshes and rotates with the bevel gear 1 92, driving the rotating base 61 to rotate through the cooperation of the transmission gear 94 and the transmission belt 95. The transmission belt 95 and the transmission gear 94 are disposed below the base 1 to avoid interference with the rotation of the clamping assembly clamping the fixed rod 5.

[0034] Among them, the clamping assembly includes a slider 81, a U-shaped plate 82, two clamping springs 83, two movable blocks 84, four guide rods 85 and two clamping rods 86. The slider 81 is connected to the bottom of the slide groove 63 through a reset spring 64. The U-shaped plate 82 and the slider 81 are vertically connected. Two guide rods 85 are passed through both sides of the U-shaped plate 82. The guide rod 85 is located on one side of the inside of the U-shaped plate 82 and a movable block 84 is provided. The two movable blocks 84 are connected to the U-shaped plate 82 through the clamping spring 83. The two movable blocks 84 are provided with a clamping rod 86. The two clamping rods 86 cooperate to form a square space for clamping the fixed point rod 5.

[0035] The material storage frame 3 is tilted on the support frame 2, and a limit block 31 is provided inside the material storage frame 3. An inclined L-shaped slide rail 32 is provided on one side of the material storage frame 3. The clamping rods 86 are each provided with a connecting rail 87 that cooperates with the L-shaped slide rail 32. The height of the material storage frame 3 is higher than the height of the clamping assembly. When the unloading rod 30 in the material storage frame 3 rotates 90 degrees, it moves a fixed rod 5 in the material storage frame 3 into the L-shaped slide rail 32. The material storage frame 3 slides downward through the connecting rail 87 of the L-shaped slide rail 32 and the corresponding clamping rod 86 on the clamping assembly, and slides into the space between the two clamping rods 86 and is fixed by gravity.

[0036] The fixed rod 5 includes a rod body 51 and a limiting round block 52. The bottom of the rod body 51 is conical. The limiting round block 52 is arranged at the top of the rod body 51. The radius of the limiting round block 52 is slightly larger than the radius of the rod body 51. The spatial structure inside the storage frame 3 matches the shape of the fixed rod 5. The rod body 51 cooperates with the two clamping rods 86 to form a square space tangent to the clamping fixed rod 5, so that the clamping rod 86 fixes the position of the fixed rod 5. The rod body 51 and the L-shaped slide The inner side of the rail 32 is tangent, and the fixed rod 5 slides in the slide rail through the rod body 51, the limiting circle 52 and the L-shaped slide rail 32; the two clamping rods 86 are provided with an inward inclined inclined surface structure on the side close to the connecting rail 87, so that when the fixed rod 5 slides from the connecting rail 87 and hits the inclined surface of the clamping rod 86, the clamping rod 86 moves to both sides so that the fixed rod 5 enters between the two clamping rods 86, and the clamping rod 86 is reset by the clamping spring 83, thereby fixing the fixed rod 5 between the clamping rods 86.

[0037] The pressing mechanism includes a gantry 71 , a pressing cylinder 72 and a pressing plate 73 . The pressing cylinder 72 is arranged on the gantry 71 , and the pressing plate 73 is arranged at the output end of the pressing cylinder 72 .

[0038] The base 1 is provided with a fixed-point through-hole 33, with reset blocks 34 provided on both sides of the fixed-point through-hole 33. The top of the reset block 34 and the bottom of the movable block 84 are provided with opposite inclined structures, and the inclined structure on the top of the reset block 34 cooperates with the inclined structure on the bottom of the movable block 84. When the pressing mechanism presses down the clamping assembly and the fixed-point rod 5 for positioning, after the lower part of the fixed-point rod 5 is driven into the ground a certain distance through the fixed-point through-hole 33, the reset block 34 cooperates with the movable block 84 to move the movable block 84 to the sides, thereby releasing the fixed-point rod 5 from the lock of the clamping rod 86. When the pressing mechanism is reset, the clamping assembly is reset under the elastic force of the reset spring 64, and will not drive the fixed-point rod 5 upward.

[0039] Among them, the lifting cylinder 4 is initially in the pushing state. When the fixed rod 5 in the clamping mechanism below the pressing mechanism needs to be supplemented, the lifting cylinder 4 is reset and pushed out again, and the rotating mechanism rotates ninety degrees so that the connecting rail 87 of the clamping rod 86 on the clamping mechanism below the pressing mechanism is docked with the L-shaped slide rail 32. At the same time, the unloading rod 30 in the storage frame 3 rotates ninety degrees to move a fixed rod 5 in the storage frame 3 into the L-shaped slide rail 32. Since the L-shaped slide rail 32 is tilted and the rod body is tangent to the inner side of the L-shaped slide rail 32, the fixed rod 5 naturally falls from the horizontal state to the vertical state when it falls into the L-shaped slide rail 32 and slides on the L-shaped slide rail 32 through the limiting circle 52, and then slides downward through the L-shaped slide rail 32 and the connecting rail 87 of the clamping rod 86 on the corresponding clamping assembly, and slides into the two clamping rods 86 by gravity for clamping and fixing.

[0040] Working principle:

[0041] The staff first adds a number of fixed rods 5 into the material storage frame 3 , and the fixed rods 5 are neatly arranged in sequence inside the material storage frame 3 under the constraint of the limit blocks 31 . By resetting the lifting cylinder 4, the lifting plate 10 moves downward, and the rack 13 on the lifting block 11 drives the driven gear 15 and the ratchet 16 to rotate. At this time, the ratchet 16 cooperates with the pawl 120 to drive the rotating disk 19 to rotate, and then drives the rotating mechanism to rotate ninety degrees through the transmission mechanism, so that the clamping mechanism that needs to be loaded is rotated to the loading position; at the same time, the rack 13 on the lifting block 21 drives the driven gear 25 and the ratchet 26 to rotate. At this time, the ratchet 26 and the pawl 29 cooperate to drive the rotating disk 28 to rotate, and then drives the unloading rod 30 on the unloading shaft 27 to rotate ninety degrees, and moves a fixed rod 5 to fall to complete the unloading; then the fixed rod 5 falls into the L-shaped slide rail 32, and slides downward through the L-shaped slide rail 32 and the connecting rail 87 of the clamping rod 86 on the corresponding clamping assembly, and slides into the two clamping rods 86 by gravity for clamping and fixing; repeat the above process so that the four clamping assemblies are all clamped with the fixed rod 5.

[0042] When it is necessary to drive the fixed rod 5 into the ground, the lower pressing plate 73 of the pressing mechanism is pushed downward, driving the clamping assembly and the fixed rod 5 to move downward together. When the lower part of the fixed rod 5 is driven into the ground for a certain distance through the fixed through hole 33, the reset block 34 cooperates with the movable block 84 to make the movable block 84 move to both sides, thereby making the fixed rod 5 free from the lock of the clamping rod 86. When the pressing mechanism is reset, the clamping assembly is reset under the elastic force of the reset spring 64, and will not drive the fixed rod 5 to rise.

[0043] When the fixed rod 5 in the clamping mechanism below the pressing mechanism needs to be replenished, the lifting cylinder 4 is reset and pushed out again, and the rotating mechanism rotates 90 degrees so that the connecting rail 87 of the clamping rod 86 on the clamping mechanism below the pressing mechanism docks with the L-shaped slide rail 32. At the same time, the unloading rod 30 in the storage frame 3 rotates 90 degrees to toggle a fixed rod 5 in the storage frame 3 into the L-shaped slide rail 32. The fixed rod 5 slides downward through the connecting rail 87 of the clamping rod 86 on the corresponding clamping assembly and slides into the space between the two clamping rods 86 for clamping and fixing by gravity. After the fixed rod 5 is driven into the ground, the resetting of the clamping mechanism and the loading process of the fixed rod 5 do not require manual operation by the staff, which improves work efficiency and reduces the workload of the staff.

Claims

1. A land surveying point device, comprising a movable base (1), a support frame (2), a material storage frame (3), a lifting cylinder (4), a rotating mechanism, a pressing mechanism and four clamping components, characterized in that: A fixed rod (5) is provided in the storage frame (3), a lifting plate (10) is provided at the output end of the lifting cylinder (4), a lifting block (11) is provided at the bottom of one side of the lifting plate (10), the lifting block (11) is slidably connected to the inside of the fixed frame (12), a rack (13) is provided on the lifting block (11), a rotating shaft (14) for rotational connection is provided on the fixed frame (12), and a driven gear (1) is provided on one side of the rotating shaft (14) located inside the fixed frame (12). (15), the rack one (13) is meshed with the driven gear one (15), the rotating shaft one (14) is provided with a ratchet one (16) on one side outside the fixed frame (12), the base (1) is provided with a fixing frame one (17), the fixing frame one (17) is rotatably connected with a connecting column (18), the connecting column (18) is provided with a rotating disk one (19), the rotating disk one (19) is provided with a rotatably connected ratchet one (20), the ratchet one (20) is meshed with the ratchet one (16) A transmission mechanism is provided between the connecting column (18) and the rotating mechanism, a lifting block 2 (21) is provided on the upper side of the lifting plate (10) away from the lifting block 1 (11), a rack 2 (22) is provided on the lifting block 2 (21), a fixing frame 2 (23) is provided on the storage frame (3), a rotating shaft 2 (24) is rotatably connected to the fixing frame 2 (23), a driven gear 2 (25) is provided on the rotating shaft 2 (24), the rack 2 (22) and the driven gear 2 (25) are connected to each other. The second rotating shaft (24) is provided with a ratchet wheel (26), and a rotatably connected unloading shaft (27) is provided in the storage frame (3). One end of the unloading shaft (27) passes through the storage frame (3) and is provided with a rotating disk (28). The second rotating disk (28) is provided with a rotatably connected ratchet wheel (29). The ratchet wheel (29) is meshed with the ratchet wheel (26). A plurality of unloading rods (30) are provided on the unloading shaft (27), and the unloading rods (30) are cross-shaped structures.

2. A land surveying pointing device according to claim 1, characterized in that: The rotating mechanism includes a rotating base (61) and a mounting base (62), wherein the rotating base (61) is rotatably connected to the base (1), and the mounting base (62) is provided with four circumferentially equidistantly distributed sliding grooves (63), each of which is provided with a return spring (64), and the four clamping assemblies are respectively slidably connected in the four sliding grooves (63).

3. A land surveying pointing device according to claim 1, characterized in that: The transmission mechanism comprises a transmission shaft (91), a bevel gear 1 (92), a bevel gear 2 (93), two transmission gears (94) and a transmission belt (95); the transmission shaft (91) is rotatably connected to the base (1); the bevel gear 1 (92) is arranged on the connecting column (18); the bevel gear 2 (93) is arranged on the transmission shaft (91); the bevel gear 1 (92) and the bevel gear 2 (93) are meshed and connected; the two transmission gears (94) are respectively arranged on the transmission shaft (91) and the rotating base (61); and the two transmission gears (94) are connected by a transmission belt (95).

4. A land surveying pointing device according to claim 1, characterized in that: The clamping assembly comprises a slider (81), a U-shaped plate (82), two clamping springs (83), two movable blocks (84), four guide rods (85) and two clamping rods (86); the slider (81) is connected to the bottom of the slide groove (63) through a return spring (64); the U-shaped plate (82) and the slider (81) are vertically connected; two guide rods (85) are provided on both sides of the U-shaped plate (82); a movable block (84) is provided on one side of the guide rod (85) located inside the U-shaped plate (82); the two movable blocks (84) are connected to the U-shaped plate (82) through a clamping spring (83); a clamping rod (86) is provided on each of the two movable blocks (84); the two clamping rods (86) cooperate to form a square space for clamping the fixed point rod (5).

5. A land surveying pointing device according to claim 4, characterized in that: The material storage frame (3) is tiltedly arranged on the support frame (2), a limit block (31) is arranged in the material storage frame (3), an inclined L-shaped slide rail (32) is arranged on one side of the material storage frame (3), and a connecting rail (87) that matches the L-shaped slide rail (32) is arranged on the clamping rod (86).

6. A land surveying pointing device according to claim 4, characterized in that: The fixed point rod (5) comprises a rod body (51) and a limiting circular block (52), the bottom of the rod body (51) is conical, the limiting circular block (52) is arranged at the top of the rod body (51), the radius of the limiting circular block (52) is slightly larger than the radius of the rod body (51), the spatial structure inside the storage frame (3) is matched with the shape of the fixed point rod (5), the rod body (51) cooperates with two clamping rods (86) to form a square space for clamping the fixed point rod (5), the rod body (51) is tangent to the inner side of the L-shaped slide rail (32), and the two clamping rods (86) are provided with an inwardly inclined inclined surface structure on the side close to the connecting rail (87).

7. The land surveying pointing device according to claim 1, characterized in that: The downward pressing mechanism comprises a gantry (71), a downward pressing cylinder (72) and a downward pressing plate (73); the downward pressing cylinder (72) is arranged on the gantry (71); and the downward pressing plate (73) is arranged at the output end of the downward pressing cylinder (72).

8. The land surveying pointing device according to claim 4, characterized in that: The base (1) is provided with a fixed through hole (33), and reset blocks (34) are provided on both sides of the fixed through hole (33). The top of the reset block (34) and the bottom of the movable block (84) are provided with opposite inclined surface structures, and the inclined surface structure at the top of the reset block (34) matches the inclined surface structure at the bottom of the movable block (84).

9. The land surveying pointing device according to claim 1, characterized in that: The lifting cylinder (4) is initially in a pushing state. When the fixed rod (5) in the clamping mechanism below the pressing mechanism needs to be supplemented, the lifting cylinder (4) is reset and pushed out again. The rotating mechanism rotates ninety degrees so that the connecting rail (87) of the clamping rod (86) on the clamping mechanism below the pressing mechanism docks with the L-shaped slide rail (32). At the same time, the unloading rod (30) in the storage frame (3) rotates ninety degrees to move a fixed rod (5) in the storage frame (3) into the L-shaped slide rail (32). The fixed rod (5) slides downward through the L-shaped slide rail (32) and the connecting rail (87) of the clamping rod (86) on the corresponding clamping assembly and slides into the space between the two clamping rods (86) for clamping and fixing by gravity.

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