Soil sampling device

Abstract

The utility model discloses a soil sampling device, which relates to the technical field of soil detection, and comprises a mechanism plate, the middle part of the upper surface of the mechanism plate is fixedly connected with a support frame, the left position of the upper side of the mechanism plate is fixedly connected with a drilling mechanism, and the left position of the lower surface of the inner side of the mechanism plate is rotatably connected with a lifting mechanism. The outer side of the lifting mechanism is in threaded connection with four annularly-distributed screw pipes, and the lower sides of the screw pipes are fixedly connected with a supporting plate. According to the soil sampling device disclosed by the utility model, a first clamping ring is pressed downwards, so that the first clamping ring and a second clamping ring are separated from each other, then a convex block on a connector slides on the inner side of a limiting groove, so that a rotating pipe is separated from an extension rod, and then a motor drives a third gear to rotate, so that a second screw rod enters the inner side of a screw pipe; the whole body is divided into two parts, the overall size is reduced, and storage is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of soil detection, in particular to a soil sampling device. Background Art

[0002] A soil layer is a layer of soil that is roughly parallel to the ground in the soil profile. Each soil layer has obvious differences from the soil layers above and below it in color, structure, texture, binding capacity, type and quantity of organisms, and pH value, reflecting the differences in the physical, chemical, and biological properties of each soil layer. Furthermore, during the soil drilling process, different soil layers have different drilling methods and rates, necessitating soil sampling and analysis.

[0003] For example, the Chinese patent with publication number CN217717028U discloses a soil sampling device, which belongs to the field of soil detection technology. A soil sampling device includes a shell, and also includes: a drill tube, which is connected and fixed to the shell; a collection chamber, which is opened in the middle of the shell; an auger, which is rotatably connected to the drill tube, and the auger is rotatably connected to the shell; a drive motor, the output end of the drive motor is fixedly installed with the auger, and the drive motor is fixedly installed with the shell. The device can conveniently sample soil.

[0004] The existing technology has the following problems:

[0005] The upper and lower sides of the soil sampling device are relatively protruding, and the outer shell diameter is larger than the upper and lower sides, which makes the device easy to roll when it is stored, and the components on the upper and lower sides are squeezed, which may cause damage to the components. Utility Model Content

[0006] The utility model provides a soil sampling device to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A soil sampling device comprises a mechanism plate, wherein a support frame is fixedly connected to the middle of the upper surface of the mechanism plate, a drilling mechanism is fixedly connected to the upper left position of the mechanism plate, a lifting mechanism is rotatably connected to the inner lower surface of the mechanism plate to the left, four annularly distributed spiral tubes are threadedly connected to the outer side of the lifting mechanism, and the lower side of the spiral tubes is fixedly connected to the support plate.

[0009] Preferably, the drilling mechanism includes a motor, the lower side of the motor is fixedly connected to the left side of the upper surface of the mechanism plate, the output end of the motor is fixedly connected to the first gear, and the first gear is located in the inner cavity of the mechanism plate, the middle part of the upper surface of the inner cavity of the mechanism plate is rotatably connected to the second gear, the inner side of the second gear is movably sleeved with a rotating tube, the inner side of the rotating tube is threadedly connected with a first screw rod, and the upper end of the first screw rod is fixedly connected to the axis center of the inner upper surface of the support frame.

[0010] Preferably, a connecting head is fixedly connected to the axis of the lower end of the rotating tube, an extension rod is movably sleeved on the outer side of the connecting head, four annularly distributed limiting grooves are opened on the inner wall of the extension rod near the upper side, the limiting grooves are L-shaped, and a protrusion on the outer wall of the connecting head near the bottom is slidably connected to the inner side of the limiting groove.

[0011] Preferably, a fixing component is movably connected to the outer wall of the extension rod near the upper side, and a first flange is fixedly connected to the outer wall of the extension rod near the upper side. The fixing component includes a first spring, the first spring is movably connected to the outer side of the extension rod near the upper side, and the first spring is located on the upper side of the first flange, a first clamping ring is movably connected to the outer side of the extension rod near the upper side, and the first clamping ring is located on the upper side of the first spring, and a second clamping ring is fixedly connected to the outer wall of the rotating tube near the bottom, and the upper side of the first clamping ring and the lower side of the second clamping ring are movably connected to each other.

[0012] Preferably, an electromagnetic telescopic rod is fixedly sleeved on the inner side of the extension rod near the bottom, an auger is fixedly connected to the lower end of the electromagnetic telescopic rod, and a conical head is fixedly connected to the lower end of the auger.

[0013] Preferably, the lifting mechanism includes a third gear, the lower side of the third gear is rotatably connected to the lower surface of the inner side of the mechanism plate near the left side, the inner side of the third gear is movably sleeved with a transmission assembly, the transmission assembly includes a transmission sleeve rod, the outer side of the transmission sleeve rod is movably sleeved on the inner side of the third gear, and the protrusion at the axis center of the lower surface of the first gear is movably sleeved on the inner side of the transmission sleeve rod, the lower end of the transmission sleeve rod is fixedly connected with a circular plate, and the circular plate is located on the lower side of the mechanism plate, the inner side of the circular plate is movably sleeved with four annularly distributed limit rods, the upper end of the limit rod is fixedly connected to the lower surface of the mechanism plate, the outer walls of the four limit rods are movably sleeved with a second spring, and the second spring is located on the lower side of the circular plate.

[0014] Preferably, a gear ring is rotatably connected to the inner lower surface of the mechanism plate near the edge, and four annularly distributed second screw rods are rotatably connected to the inner lower surface of the mechanism plate near the edge, the inner side of the screw tube is threadedly connected to the outer side of the second screw rod, and the upper ends of the four second screw rods are fixedly connected to a fourth gear, and the side of the fourth gear close to the second gear is meshedly connected to the outer side of the gear ring, and the left side of the third gear is meshedly connected to the inner side of the gear ring.

[0015] Preferably, a second flange is fixedly connected to the outer wall of the spiral tube on the left side near the upper side, a third spring is fixedly connected to the outer wall of the spiral tube on the left side near the upper side, and the third spring is located on the upper side of the second flange, a fixing frame is fixedly connected to the outer wall of the spiral tube on the left side near the upper side, and the fixing frame is located on the upper side of the third spring, a magnet is fixedly connected to the upper surface of the fixing frame near the right side, and the magnet is located directly below the transmission sleeve.

[0016] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0017] 1. The utility model provides a soil sampling device, which adopts a rotating tube, a first screw rod, a connecting head, an extension rod, a limiting groove, a fixing assembly, a first spring, a first clamping ring, a second clamping ring, a lifting mechanism, a third gear, a transmission assembly, a transmission sleeve rod, a circular plate, a limiting rod, a second spring, a third spring, a fixing frame, a magnet, a gear ring, a second screw rod, a fourth gear, a screw tube and a supporting plate. By pressing down the first clamping ring, the first clamping ring and the second clamping ring are separated from each other, and then the protrusion on the connecting head slides on the inner side of the limiting groove to separate the rotating tube and the extension rod, and then the motor drives the third gear to rotate, so that the second screw rod enters the inner side of the screw tube, so that the whole is divided into two parts, and at the same time the overall volume is reduced, which is convenient for storage.

[0018] 2. The utility model provides a soil sampling device, which adopts the cooperation of a mechanism plate, a motor, a first gear, a second gear, a first screw rod, a connector, an extension rod, a limiting groove, an electromagnetic telescopic rod, an auger, a conical head, a rotating tube, a lifting mechanism, a third gear, a transmission assembly, a transmission sleeve rod, a circular plate, a limiting rod, a second spring, a third spring, a fixing frame, a magnet, a gear ring, a second screw rod, a fourth gear, a screw tube and a supporting plate. The third gear is driven by the motor to rotate, so that the mechanism plate moves downward and the motor drives the second gear to rotate, so that the extension rod rotates accordingly, so that the extension rod goes deeper into the figure. When the second screw rod completely enters the inner side of the screw tube, the magnet attracts the circular plate, so that the transmission sleeve rod is disengaged from the first gear, so that the motor cannot continue to drive the third gear to rotate, and the electromagnetic telescopic rod extends the auger, and then sampling is performed. The sampling range is small, so that excess soil is prevented from being carried out, resulting in the problem that the overall cleaning is difficult. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the utility model;

[0021] Figure 3 It is a partial cross-sectional three-dimensional structural diagram of the drilling mechanism of the utility model;

[0022] Figure 4 It is a partial cross-sectional three-dimensional structural schematic diagram of the extension rod portion of the utility model;

[0023] Figure 5 The three-dimensional structure diagram of the transmission component of the utility model is as follows

[0024] In the figure: 1. mechanism plate; 2. support frame; 3. drilling mechanism; 31. motor; 32. first gear; 33. second gear; 34. first screw rod; 35. connector; 36. extension rod; 37. limiting groove; 38. fixing assembly; 381. first spring; 382. first clamp ring; 383. second clamp ring; 39. electromagnetic telescopic rod; 310. auger; 311. conical head; 312. rotating tube; 4. lifting mechanism; 41. third gear; 42. transmission assembly; 421. transmission sleeve rod; 422. circular plate; 423. limiting rod; 424. second spring; 43. third spring; 44. fixing frame; 45. magnet; 46. gear ring; 47. second screw rod; 48. fourth gear; 5. solenoid; 6. support plate. DETAILED DESCRIPTION

[0025] 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 described below in conjunction with specific implementation methods.

[0026] like Figure 1 As shown, a soil sampling device comprises a mechanism plate 1, a support frame 2 is fixedly connected to the middle of the upper surface of the mechanism plate 1, a drilling mechanism 3 is fixedly connected to the upper left position of the mechanism plate 1, a lifting mechanism 4 is rotatably connected to the left position of the inner lower surface of the mechanism plate 1, four annularly distributed spiral tubes 5 are threadedly connected to the outer side of the lifting mechanism 4, and a support plate 6 is fixedly connected to the lower side of the spiral tube 5.

[0027] It should be noted that the support plate 6 is used to prop up the whole device to avoid the problem that the device is placed unsteadily during sampling, which leads to sampling difficulties.

[0028] like Figure 2 , Figure 3As shown, the drilling mechanism 3 includes a motor 31, the lower side of the motor 31 is fixedly connected to the left side of the upper surface of the mechanism plate 1, the output end of the motor 31 is fixedly connected to the first gear 32, and the first gear 32 is located in the inner cavity of the mechanism plate 1, and the middle part of the upper surface of the inner cavity of the mechanism plate 1 is rotatably connected to the second gear 33, the inner side of the second gear 33 is movably sleeved with a rotating tube 312, the inner side of the rotating tube 312 is threadedly connected with a first screw rod 34, and the upper end of the first screw rod 34 is fixedly connected to the axis center of the inner upper surface of the support frame 2.

[0029] It should be noted that the motor 31 drives the first gear 32 to rotate, and when the first gear 32 rotates, it drives the second gear 33 to rotate. There is a slider on the inner side of the second gear 33, which is connected to the outer groove of the rotating tube 312, so that when the second gear 33 rotates, the rotating tube 312 follows the rotation. When the rotating tube 312 rotates, it is threadedly connected to the first screw rod 34, causing the rotating tube 312 to move up and down.

[0030] like Figure 4 As shown, a connector 35 is fixedly connected to the axis of the lower end of the rotating tube 312, and an extension rod 36 is movably sleeved on the outer side of the connector 35. Four annular limiting grooves 37 are provided on the inner wall of the extension rod 36 near the upper side. The limiting grooves 37 are L-shaped, and a protrusion on the outer wall of the connector 35 near the bottom is slidably connected to the inner side of the limiting groove 37.

[0031] It should be noted that the upper end of the limiting groove 37 extends upward to the upper surface of the extension rod 36. When the protrusion on the outside of the connecting head 35 is located on the inside of the limiting groove 37, the extension rod 36 cannot be pulled downward and needs to be rotated at a certain angle to separate the rotating tube 312 and the extension rod 36.

[0032] like Figure 4 As shown, a fixing assembly 38 is movably connected to the outer wall of the extension rod 36 near the upper side, and a first flange is fixedly connected to the outer wall of the extension rod 36 near the upper side. The fixing assembly 38 includes a first spring 381, and the first spring 381 is movably connected to the outer side of the extension rod 36 near the upper side, and the first spring 381 is located on the upper side of the first flange. A first clamping ring 382 is movably connected to the outer side of the extension rod 36 near the upper side, and the first clamping ring 382 is located on the upper side of the first spring 381. A second clamping ring 383 is fixedly connected to the outer wall of the rotating tube 312 near the bottom, and the upper side of the first clamping ring 382 and the lower side of the second clamping ring 383 are movably connected to each other.

[0033] It should be noted that when the first clamp ring 382 and the second clamp ring 383 are mutually socketed, the extension rod 36 cannot rotate. The rotation of the rotating tube 312 will rely on the mutual socketing of the first clamp ring 382 and the second clamp ring 383 to cause the extension rod 36 to rotate accordingly, pulling the first clamp ring 382 downward, causing the first clamp ring 382 and the second clamp ring 383 to separate, and the extension rod 36 can then rotate.

[0034] like Figure 4 As shown, an electromagnetic telescopic rod 39 is fixedly sleeved on the inner side of the extension rod 36 near the bottom, the lower end of the electromagnetic telescopic rod 39 is fixedly connected to an auger 310 , and the lower end of the auger 310 is fixedly connected to a conical head 311 .

[0035] It should be noted that the electromagnetic telescopic rod 39 pushes the auger 310 downward to extend the auger 310. When the auger 310 is extended, it can collect surrounding soil. The conical head 311 is used to close the bottom end of the extension rod 36 to prevent soil from entering the inner side of the conical head 311 before the electromagnetic telescopic rod 39 extends the auger 310.

[0036] like Figure 1 , Figure 3 and Figure 5 As shown, the lifting mechanism 4 includes a third gear 41, the lower side of the third gear 41 is rotatably connected to the position of the lower surface of the inner side of the mechanism plate 1 near the left side, the inner side of the third gear 41 is movably sleeved with a transmission assembly 42, the transmission assembly 42 includes a transmission sleeve rod 421, the outer side of the transmission sleeve rod 421 is movably sleeved on the inner side of the third gear 41, and the protrusion at the axis center of the lower surface of the first gear 32 is movably sleeved on the inner side of the transmission sleeve rod 421, the lower end of the transmission sleeve rod 421 is fixedly connected with a circular plate 422, and the circular plate 422 is located on the lower side of the mechanism plate 1, the inner side of the circular plate 422 is movably sleeved with four annularly distributed limit rods 423, the upper ends of the limit rods 423 are fixedly connected to the lower surface of the mechanism plate 1, the outer walls of the four limit rods 423 are movably sleeved with second springs 424, and the second springs 424 are located on the lower side of the circular plate 422.

[0037] It should be noted that when the protrusion on the lower side of the first gear 32 is movably sleeved on the inner side of the transmission sleeve 421, the rotation of the first gear 32 can drive the transmission sleeve 421 to rotate, and the rotation of the transmission sleeve 421 drives the third gear 41 to rotate, and the second spring 424 pushes the circular plate 422 upward, so that the protrusion on the lower side of the first gear 32 will not separate from the transmission sleeve 421.

[0038] like Figure 2 , Figure 3As shown, a gear ring 46 is rotatably connected to the inner lower surface of the mechanism plate 1 near the edge, and four annularly distributed second screw rods 47 are rotatably connected to the inner lower surface of the mechanism plate 1 near the edge. The inner side of the screw tube 5 is threadedly connected to the outer side of the second screw rod 47, and the upper ends of the four second screw rods 47 are fixedly connected to a fourth gear 48. The side of the fourth gear 48 close to the second gear 33 is meshedly connected to the outer side of the gear ring 46, and the left side of the third gear 41 is meshedly connected to the inner side of the gear ring 46.

[0039] It should be noted that when the third gear 41 rotates, it drives the ring gear 46 to rotate. When the ring gear 46 rotates, it drives the fourth gear 48 to rotate. When the fourth gear 48 rotates, it drives the second screw rod 47 to rotate. When the second screw rod 47 rotates, the second screw rod 47 moves up and down along the screw tube 5, causing the mechanism plate 1 to move up and down.

[0040] like Figure 2 As shown, a second flange is fixedly connected to the outer wall of the left side spiral tube 5 near the upper side, a third spring 43 is fixedly connected to the outer wall of the left side spiral tube 5 near the upper side, and the third spring 43 is located on the upper side of the second flange, a fixing frame 44 is fixedly connected to the outer wall of the left side spiral tube 5 near the upper side, and the fixing frame 44 is located on the upper side of the third spring 43, a magnet 45 is fixedly connected to the upper surface of the fixing frame 44 near the right side, and the magnet 45 is located directly below the transmission sleeve 421.

[0041] It should be noted that when the mechanism plate 1 moves to the lowermost side, the magnet 45 attracts the circular plate 422 to move downward, causing the transmission sleeve 421 to disengage from the protrusion on the lower side of the first gear 32, so that the motor 31 cannot drive the transmission sleeve 421 to rotate. At this time, the motor 31 can continue to drive the second gear 33 to rotate, pressing down the fixing frame 44, causing the magnet 45 to disengage from the circular plate 422, causing the second spring 424 to push the circular plate 422 to reset. At this time, the motor 31 can drive the transmission sleeve 421 to rotate.

[0042] The working principle of the utility model is as follows: first, the upper end of the limiting groove 37 extends upward to the upper surface of the extension rod 36. When the protrusion on the outer side of the connecting head 35 is located on the inner side of the limiting groove 37, the extension rod 36 cannot be pulled out downward, and a certain angle needs to be rotated to separate the rotating tube 312 and the extension rod 36. When the first clamping ring 382 and the second clamping ring 383 are sleeved together, the extension rod 36 cannot rotate. The rotation of the rotating tube 312 will rely on the sleeve connection of the first clamping ring 382 and the second clamping ring 383 to cause the extension rod 36 to rotate accordingly. The first clamping ring 382 is pulled downward, causing the first clamping ring 382 and the second clamping ring 383 to disengage, and the extension rod 36 can rotate. When the third gear 41 rotates, it drives the gear ring 46 to rotate, and when the gear ring 46 rotates, it drives the fourth gear 41 to rotate. The gear 48 rotates, and when the fourth gear 48 rotates, it drives the second screw rod 47 to rotate. When the second screw rod 47 rotates, the second screw rod 47 moves up and down along the screw tube 5, causing the mechanism plate 1 to move up and down, and by pressing down the first clamping ring 382, ​​the first clamping ring 382 and the second clamping ring 383 are separated from each other, and then the protrusion on the connecting head 35 slides inside the limiting groove 37, so that the rotating tube 312 and the extension rod 36 are separated, and then the motor 31 drives the third gear 41 to rotate, so that the second screw rod 47 enters the inner side of the screw tube 5, so that the whole is divided into two parts, and at the same time the whole volume is reduced for easy storage. Finally, when the third gear 41 rotates, it drives the gear ring 46 to rotate, and when the gear ring 46 rotates, it drives the fourth gear 48 to rotate. When the fourth gear 48 rotates The second screw rod 47 is driven to rotate. When the second screw rod 47 rotates, the second screw rod 47 moves up and down along the screw tube 5, causing the mechanism plate 1 to move up and down. When the mechanism plate 1 moves to the lowest side, the magnet 45 attracts the circular plate 422 to move downward, causing the transmission sleeve rod 421 to disengage from the protrusion on the lower side of the first gear 32, so that the motor 31 cannot drive the transmission sleeve rod 421 to rotate. At this time, the motor 31 can continue to drive the second gear 33 to rotate. The motor 31 drives the first gear 32 to rotate. When the first gear 32 rotates, it drives the second gear 33 to rotate. There is a slider on the inner side of the second gear 33, which is connected to the outer groove of the rotating tube 312. When the second gear 33 rotates, the rotating tube 312 rotates with it. When the rotating tube 312 rotates, it is threadedly connected with the first screw rod 34. , causing the rotating tube 312 to move up and down, and the electromagnetic telescopic rod 39 pushes the auger 310 downward to extend the auger 310. When the auger 310 is extended, it can collect the surrounding soil. The conical head 311 is used to close the bottom end of the extension rod 36 to prevent the soil from entering the inner side of the conical head 311 before the electromagnetic telescopic rod 39 extends the auger 310. The third gear 41 is driven to rotate by the motor 31, causing the mechanism plate 1 to move downward. At the same time, the motor 31 drives the second gear 33 to rotate, causing the extension rod 36 to rotate accordingly, so that the extension rod 36 goes deeper into the figure. When the second screw rod 47 completely enters the inner side of the spiral tube 5, the magnet 45 attracts the circular plate 422, causing the transmission sleeve rod 421 to disengage from the first gear 32, so that the motor 31 can no longer drive the third gear 41 to rotate.The electromagnetic telescopic rod 39 extends the auger 310 and then performs sampling. The sampling range is small to avoid excess soil being carried out, which would make the overall cleaning difficult.

[0043] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and the description of the principles of the utility model are described. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A soil sampling device, comprising a mechanism plate (1), characterized in that: A support frame (2) is fixedly connected to the middle of the upper surface of the mechanism plate (1), a drilling mechanism (3) is fixedly connected to the upper left position of the mechanism plate (1), a lifting mechanism (4) is rotatably connected to the inner lower surface of the mechanism plate (1), four annularly distributed spiral tubes (5) are threadedly connected to the outer side of the lifting mechanism (4), and a support plate (6) is fixedly connected to the lower side of the spiral tube (5).

2. A soil sampling device according to claim 1, characterized in that: The drilling mechanism (3) comprises a motor (31), the lower side of the motor (31) is fixedly connected to the left side of the upper surface of the mechanism plate (1), the output end of the motor (31) is fixedly connected to a first gear (32), and the first gear (32) is located in the inner cavity of the mechanism plate (1), and a second gear (33) is rotatably connected to the middle of the upper surface of the inner cavity of the mechanism plate (1), the inner side of the second gear (33) is movably sleeved with a rotating tube (312), the inner side of the rotating tube (312) is threadedly connected to a first screw rod (34), and the upper end of the first screw rod (34) is fixedly connected to the axis center of the inner upper surface of the support frame (2).

3. A soil sampling device according to claim 2, characterized in that: A connector (35) is fixedly connected to the axis of the lower end of the rotating tube (312), and an extension rod (36) is movably sleeved on the outer side of the connector (35). Four annular limiting grooves (37) are provided on the inner wall of the extension rod (36) near the upper side. The limiting grooves (37) are L-shaped, and a protrusion on the outer wall of the connector (35) near the bottom is slidably connected to the inner side of the limiting groove (37).

4. A soil sampling device according to claim 3, characterized in that: The outer wall of the extension rod (36) is movably sleeved with a fixing assembly (38) near the upper side, and the outer wall of the extension rod (36) is fixedly connected with a first flange near the upper side. The fixing assembly (38) includes a first spring (381), and the first spring (381) is movably sleeved on the outer side of the extension rod (36) near the upper side, and the first spring (381) is located on the upper side of the first flange. The outer side of the extension rod (36) is movably sleeved with a first clamping ring (382), and the first clamping ring (382) is located on the upper side of the first spring (381). The outer wall of the rotating tube (312) is fixedly sleeved with a second clamping ring (383) near the bottom, and the upper side of the first clamping ring (382) and the lower side of the second clamping ring (383) are movably sleeved with each other.

5. A soil sampling device according to claim 3, characterized in that: An electromagnetic telescopic rod (39) is fixedly sleeved on the inner side of the extension rod (36) near the bottom, the lower end of the electromagnetic telescopic rod (39) is fixedly connected to an auger (310), and the lower end of the auger (310) is fixedly connected to a conical head (311).

6. A soil sampling device according to claim 2, characterized in that: The lifting mechanism (4) comprises a third gear (41), the lower side of the third gear (41) is rotatably connected to a position close to the left side of the inner lower surface of the mechanism plate (1), the inner side of the third gear (41) is movably sleeved with a transmission assembly (42), the transmission assembly (42) comprises a transmission sleeve rod (421), the outer side of the transmission sleeve rod (421) is movably sleeved on the inner side of the third gear (41), and the protrusion at the axis center of the lower surface of the first gear (32) is movably sleeved on the transmission sleeve rod (421). 1), the lower end of the transmission sleeve rod (421) is fixedly connected to a circular plate (422), and the circular plate (422) is located at the lower side of the mechanism plate (1), the inner side of the circular plate (422) is movably sleeved with four annularly distributed limiting rods (423), the upper ends of the limiting rods (423) are fixedly connected to the lower surface of the mechanism plate (1), the outer walls of the four limiting rods (423) are movably sleeved with a second spring (424), and the second spring (424) is located at the lower side of the circular plate (422).

7. A soil sampling device according to claim 6, characterized in that: A gear ring (46) is rotatably connected to the inner lower surface of the mechanism plate (1) near the edge, and four annularly distributed second screw rods (47) are rotatably connected to the inner lower surface of the mechanism plate (1) near the edge. The inner side of the screw tube (5) is threadedly connected to the outer side of the second screw rod (47), and the upper ends of the four second screw rods (47) are fixedly connected to a fourth gear (48). The side of the fourth gear (48) close to the second gear (33) is meshedly connected to the outer side of the gear ring (46), and the left side of the third gear (41) is meshedly connected to the inner side of the gear ring (46).

8. A soil sampling device according to claim 6, characterized in that: A second flange is fixedly connected to the outer wall of the solenoid (5) on the left side near the upper side, a third spring (43) is fixedly connected to the outer wall of the solenoid (5) on the left side near the upper side, and the third spring (43) is located on the upper side of the second flange, a fixing frame (44) is fixedly connected to the outer wall of the solenoid (5) on the left side near the upper side, and the fixing frame (44) is located on the upper side of the third spring (43), and a magnet (45) is fixedly connected to the upper surface of the fixing frame (44) near the right side, and the magnet (45) is located directly below the transmission sleeve rod (421).

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