A soil nutrient testing device

Abstract

The present invention discloses a soil nutrient testing device, which relates to the technical field of soil detection. The key points of its technical solution include a support mechanism and a threaded excavation rod rotatably connected to the support mechanism. The threaded excavation rod is provided with a driving rotator, and an excavation head with an axis intersecting the axis of the threaded excavation rod is arranged at the bottom of the threaded excavation rod. The excavation head is used to perform a circumferential rotational movement with the threaded excavation rod as the axis. The excavation head is provided with an excavation cone with an axis coinciding with the axis of the excavation head, and the excavation cone performs a circumferential rotational movement along its axis. By driving the excavation cone to perform a circumferential rotational movement along its axis while performing a circumferential rotational movement with the threaded excavation rod as the axis, the present invention achieves the purpose of loosening the deep soil, thereby reducing the drilling difficulty of the threaded excavation rod, and enabling the soil nutrient testing device to have the effect of efficiently and deeply sampling the soil while extending the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of soil detection, and more specifically, it relates to a soil nutrient testing device. Background Art

[0002] A soil nutrient detector, namely a soil nutrient analyzer, is an instrument used to measure the nutrients required by plants, crops, forest trees, and microorganisms. It consists of a main unit and sensors and can be widely used in departments such as agriculture, forestry, environmental protection, and laboratories of universities and colleges. The working principle of the soil nutrient detector is to add various elements in the sample to the standard substance, measure the content value of the sample to be measured through a chemical reaction, and then convert it into indicators such as mass fraction or percentage content.

[0003] Publication No. CN216207732U discloses a soil fertilizer nutrient measurement sampling device. The soil fertilizer nutrient measurement sampling device includes an operation frame. Rectangular grooves are provided on the inner walls of both sides of the operation frame, and sliding rods are slidably connected to the inner walls of the two rectangular grooves. The opposite ends of the two sliding rods are fixedly installed with a sampling cylinder. A connecting ring is fixedly installed at the bottom end of the sampling cylinder. A fixing cylinder is embedded in the inner wall of the connecting ring. An insertion cylinder is fixedly installed at the bottom end of the connecting ring. A piston is slidably connected to the inner wall of the sampling cylinder. A booster pump is fixedly installed at the top end of the sampling cylinder, and the air outlet end of the booster pump extends into the interior of the sampling cylinder. A lead screw is rotatably connected to the inner wall of the right rectangular groove, and a threaded hole threadedly connected to the surface of the lead screw is provided on the surface of the sliding rod. A drive motor for driving the lead screw to rotate is provided on the upper surface of the operation frame.

[0004] However, during the use of this soil fertilizer nutrient measurement sampling device, the rotation of the drive motor drives the rotation of the lead screw, and the rotation of the lead screw drives the sampling cylinder to automatically insert into the soil for sampling through the sliding rod. However, during the sampling process, the sampling cylinder will bear huge pressure during the process of penetrating into the soil, and thus there will be a problem that the threads will quickly wear due to the large pressure between the sliding block and the lead screw, which needs to be improved. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a soil nutrient testing device, which has the effect of prolonging the service life while efficiently penetrating into the soil for sampling.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A soil nutrient testing device includes a support mechanism and a threaded digging rod rotatably connected to the support mechanism. The threaded digging rod is provided with a driving rotator, and a digging head with an axis intersecting the axis of the threaded digging rod is arranged at the bottom of the threaded digging rod. The digging head is used for making a circumferential rotational movement around the threaded digging rod. The digging head is provided with a digging cone with an axis coinciding with the axis of the digging head, and the digging cone makes a circumferential rotational movement along its axis.

[0008] By adopting the above technical solution, when the driving rotator operates, the threaded digging rod is kept rotating circumferentially to achieve the effect of drilling into the soil depth; and during the drilling process of the threaded digging rod, the digging head drives the digging cone to make a circumferential rotational movement around the threaded digging rod and at the same time make a circumferential rotational movement along its axis, so as to achieve the purpose of loosening the deep soil, significantly reducing the drilling difficulty of the threaded digging rod, and enabling the soil nutrient testing device to have the effect of efficiently and deeply sampling the soil while extending the service life.

[0009] The present invention is further arranged as follows: The digging head includes a transverse swing sleeve, a longitudinal swing member located inside the transverse swing sleeve, and a rotating motor for driving the digging head to make a circumferential rotational movement around the threaded digging rod; the transverse swing sleeve is provided with a transverse rotating column rotatably connected to the threaded digging rod up and down, the longitudinal swing member is provided with a longitudinal rotating column rotatably connected to the transverse swing sleeve up and down, and the longitudinal rotating column and the transverse rotating column are perpendicular to each other; the rotating motor is fixedly connected to the threaded digging rod and is used for driving the digging cone to make a circumferential rotational movement.

[0010] By adopting the above technical solution, when the rotating motor operates, while driving the digging head to make a circumferential rotational movement around the threaded digging rod, the digging cone is made to make a circumferential rotational movement along its axis, so as to achieve the purpose of efficient driving operation; among them, when the digging head moves, the transverse swing sleeve will make an up-and-down rotational movement relative to the threaded digging rod and the longitudinal swing member will make an up-and-down rotational movement relative to the transverse swing sleeve. Also, since the longitudinal rotating column and the transverse rotating column are perpendicular to each other, further, the digging cone will be driven by the rotating motor to make a circumferential rotational movement around the threaded digging rod, so that the soil nutrient testing device has the effect of efficiently and deeply sampling the soil while extending the service life.

[0011] The present invention is further arranged as follows: The cross-section of the transverse swing sleeve is circular ring-shaped, the longitudinal section is an equal-width arc-shaped, and a swing cavity for matching with the longitudinal swing member is formed inside; the outside of the transverse swing sleeve is matched with the threaded digging rod and is provided with two symmetrically distributed longitudinal jacks for matching with the longitudinal rotating column.

[0012] By adopting the above technical solution, the outer side of the horizontal swing sleeve is in the shape of a partial sphere to form a stable rotational connection structure with the threaded excavation rod, and effectively prevent soil from getting stuck between the horizontal swing sleeve and the threaded excavation rod during the use of the soil nutrient testing device, thus affecting the service life of the excavation head. Moreover, the horizontal swing sleeve is matched and connected with the longitudinal rotating column through the longitudinal insertion hole to form a stable rotational connection structure, enabling the soil nutrient testing device to have the effect of prolonging the service life while efficiently and deeply sampling the soil.

[0013] The present invention is further configured such that: a guiding surface is provided on the outer side of the lower end of the horizontal swing sleeve.

[0014] By adopting the above technical solution, the guiding surface plays an effective guiding role, thereby releasing the hard contact force during the process of the soil nutrient testing device excavating and obtaining soil, and effectively prolonging the service life.

[0015] The present invention is further configured such that: end side planes are provided at both the upper and lower ends of the longitudinal swing member, and a swing rotating column is provided at the axis of the end side plane located at the upper end, and the rotating motor is rotationally connected to the swing rotating column.

[0016] By adopting the above technical solution, the longitudinal swing member is in the shape of a partial sphere and is connected to the rotating motor through the swing rotating column on the end side plane to form a stable connection structure, and makes stable relative swinging and rotating motions under the drive of the rotating motor.

[0017] The present invention is further configured such that: the output shaft of the rotating motor coincides with the axis of the threaded excavation rod, and a turnover plate is fixedly connected thereto. One end of the turnover plate is provided with an inclined transfer plate that inclines downward and is used for rotational connection with the swing rotating column.

[0018] By adopting the above technical solution, when the rotating motor operates, the circumferential rotation of the output shaft drives the turnover plate to perform circumferential rotation. At this time, the downward-inclined inclined transfer plate will drive the swing rotating column to perform circumferential rotation around the output shaft of the rotating motor, and when the longitudinal swing member rotates circumferentially around the output shaft of the rotating motor along with the swing rotating column, it makes the longitudinal swing member perform up-and-down rotational motion relative to the horizontal swing sleeve, and makes the horizontal swing sleeve perform up-and-down rotational motion relative to the threaded excavation rod.

[0019] The present invention is further configured such that: a sleeve gear is provided on the lower side of the inclined transfer plate and is sleeved on the swing rotating column. An adapter insertion hole is provided at the eccentric position of the end side plane located at the upper end. A transmission rod is inserted into the adapter insertion hole. Meshing gears and a transmission large gear that mesh with the sleeve gear are respectively provided at the upper and lower ends of the transmission rod; a connecting small gear that penetrates the end side plane located at the lower end and meshes with the transmission large gear is provided on the bottom surface of the excavation cone.

[0020] By adopting the above technical solution, when the inclined adapter plate makes a circumferential rotational movement around the output shaft of the rotating motor driven by the output shaft of the rotating motor, the sleeve column gear makes a circumferential rotational movement around the swinging column. Since the swinging column meshes with the meshing gear and the transmission rod is rotatably connected to the end side plane, the sleeve column gear will drive the meshing gear to make a circumferential rotational movement around the transmission rod, so that the large transmission gear at one end of the transmission drives the connecting pinion to make a circumferential rotational movement, and the purpose of making the excavation cone fixedly connected to the connecting pinion rotate and loosen the contacted soil is achieved. While having stable connection, the soil nutrient testing device has the effect of prolonging the service life while efficiently and deeply sampling the soil.

[0021] The present invention is further configured as: the tooth number ratio of the large transmission gear to the connecting pinion is greater than 1, and the tooth number ratio of the meshing gear to the sleeve column gear is less than or equal to 1.

[0022] By adopting the above technical solution, the rotation speed of the excavation cone is greater than that of the excavation head, so as to achieve a stable and efficient soil loosening effect, and further achieve the effect of prolonging the service life of the soil nutrient testing device while efficiently and deeply sampling the soil.

[0023] The present invention is further configured as: the outer peripheral side wall of the threaded excavation rod is provided with an excavation thread body and depth scale lines distributed along its axial direction.

[0024] By adopting the above technical solution, the depth scale lines are used to obtain the drilling depth of the threaded excavation rod, and the excavation thread body plays an effective role in drilling deep into the soil, so as to significantly improve the practicability of the soil nutrient testing device.

[0025] The present invention is further configured as: the support mechanism is a hand-held handle or a lifting frame; the hand-held handle is provided with an adapter ring body rotatably connected to the threaded excavation rod; the lifting frame is rotatably connected to the threaded excavation rod, and is provided with an automatic lifting member, and the pressure between the automatic lifting member and the threaded excavation rod is less than a set threshold value.

[0026] By adopting the above technical solution, when the support mechanism is a hand-held handle, an operator holds the hand-held handle manually to control the operation of the threaded excavation rod, which has the effect of convenient use; when the support mechanism is a lifting frame, the lifting frame is fixed on the soil and the automatic lifting member is rotatably connected to the threaded excavation rod. Then, during the process of the threaded excavation rod continuously advancing deep into the soil, since the pressure between the automatic lifting member and the threaded excavation rod is less than the set threshold value, the automatic lifting member will automatically descend, so as to achieve the purpose of reducing the drilling difficulty, thereby significantly improving the practicability of the soil nutrient testing device.

[0027] In summary, the present invention has the following beneficial effects: By driving the rotator to drive the threaded excavation rod with excavation threads on its outer peripheral sidewall to move deep into the soil, and then when the rotating motor drives the longitudinal pendulum to make a circumferential rotation around the threaded excavation rod, the longitudinal pendulum makes an up-and-down swinging motion around the longitudinal rotating column rotatably connected to the transverse swing sleeve, and the transverse swing sleeve makes an up-and-down swinging motion around the transverse rotating column rotatably connected to the threaded excavation rod; at the same time, during the operation of the longitudinal pendulum, the rotating motor is fixedly connected to the sleeve gear through the inclined adapter plate connected to the output shaft, thereby driving the meshing gear rotatably connected to the end-side plane formed on the longitudinal pendulum to rotate circumferentially, so as to drive the connecting pinion on the excavation cone to rotate while driving the transmission large gear to make a circumferential rotation movement, thus achieving the effects of loosening the soil and significantly reducing the drilling difficulty, making the soil nutrient testing device have the effects of efficiently and deeply sampling the soil while extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of this embodiment;

[0029] Figure 2 is a schematic structural diagram of the excavation head of this embodiment;

[0030] Figure 3 is an exploded structural diagram of the excavation head of this embodiment;

[0031] Figure 4 is a sectional structural diagram of the longitudinal pendulum of this embodiment.

[0032] Description of the reference numerals: 1, threaded excavation rod; 11, excavation threads; 12, depth scale line; 2, hand-held handle; 21, adapter ring body; 3, driving rotator; 4, excavation head; 41, transverse swing sleeve; 411, swing cavity; 412, transverse rotating column; 413, longitudinal insertion hole; 414, guiding surface; 42, longitudinal pendulum; 421, end-side plane; 422, swing rotating column; 423, longitudinal rotating column; 424, adapter insertion hole; 43, rotating motor; 431, turnover plate; 432, inclined adapter plate; 433, sleeve gear; 44, excavation cone; 441, connecting pinion; 442, transmission large gear; 443, transmission rod; 444, meshing gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0034] Example 1

[0035] As shown Figure 1 in the figure, a soil nutrient testing device includes a support mechanism and a threaded excavation rod 1 rotatably connected to the support mechanism. A driving rotator 3 is provided on the threaded excavation rod 1, and an excavation head 4 with an axis intersecting the axis of the threaded excavation rod 1 is provided at the bottom of the threaded excavation rod 1. The excavation head 4 is used to perform a circumferential rotational movement with the threaded excavation rod 1 as the axis, and an excavation cone 44 with an axis coinciding with the axis of the excavation head 4 is provided on the excavation head 4, and the excavation cone 44 is used to perform a circumferential rotational movement along its axis. Therefore, when the driving rotator 3 operates, the threaded excavation rod 1 is kept rotating circumferentially to achieve the effect of drilling into the soil depth; and during the drilling process of the threaded excavation rod 1, the excavation head 4 drives the excavation cone 44 to perform a circumferential rotational movement with the threaded excavation rod 1 as the axis and at the same time perform a circumferential rotational movement along its axis, so as to achieve the purpose of loosening the deep soil, significantly reducing the drilling difficulty of the threaded excavation rod 1, and enabling the soil nutrient testing device to have the effect of efficiently and deeply sampling the soil while extending the service life.

[0036] Among them, the support mechanism is a hand-held handle 2. The hand-held handle 2 is provided with an adapter ring body 21 rotatably connected to the threaded excavation rod 1. Therefore, when manually holding the hand-held handle 2, the purpose of controlling the operation of the threaded excavation rod 1 can be achieved, and the effect of convenient use is obtained. At the same time, an excavation thread body 11 and depth scale lines 12 distributed along its axis are provided on the outer peripheral side wall of the threaded excavation rod 1. The depth scale lines 12 are used to obtain the drilling depth of the threaded excavation rod 1, and the excavation thread body 11 plays an effective role in drilling deep into the soil, significantly improving the practicability of the soil nutrient testing device.

[0037] As shown Figure 2 , Figure 3 , Figure 4As shown in the figure, the excavation head 4 includes a transverse swing sleeve 41, a longitudinal swing member 42 located inside the transverse swing sleeve 41, and a rotation motor 43 for driving the excavation head 4 to perform a circumferential rotation movement around the threaded excavation rod 1. The transverse swing sleeve 41 is provided with a transverse rotating column 412 that is rotatably connected to the threaded excavation rod 1 up and down. The longitudinal swing member 42 is provided with a longitudinal rotating column 423 that is rotatably connected to the transverse swing sleeve 41 up and down, and the longitudinal rotating column 423 is perpendicular to the transverse rotating column 412. Among them, the rotation motor 43 is fixedly connected to the threaded excavation rod 1 and is used to drive the excavation cone 44 to perform a circumferential rotation movement. Therefore, when the rotation motor 43 operates, while driving the excavation head 4 to perform a circumferential rotation movement around the threaded excavation rod 1, the excavation cone 44 is also made to perform a circumferential rotation movement along its axis, so as to achieve the purpose of efficient driving operation. Among them, when the excavation head 4 moves, it will cause the transverse swing sleeve 41 to perform an up and down rotation movement relative to the threaded excavation rod 1 and the longitudinal swing member 42 to perform an up and down rotation movement relative to the transverse swing sleeve 41. Also, because the longitudinal rotating column 423 is perpendicular to the transverse rotating column 412, the excavation cone 44 will be driven by the rotation motor 43 to perform a circumferential rotation movement around the threaded excavation rod 1, so that the soil nutrient testing device has the effect of prolonging the service life while efficiently deepening soil sampling.

[0038] It should be noted that the cross-section of the transverse swing sleeve 41 is annular, and the longitudinal section is an equal-width arc shape, and a swing cavity 411 for matching with the longitudinal swing member 42 is formed inside the transverse swing sleeve 41. The outer side of the transverse swing sleeve 41 is matched with the threaded excavation rod 1 and is provided with two symmetrically distributed longitudinal insertion holes 413 that are matched with the longitudinal rotating column 423. Therefore, the outer side of the transverse swing sleeve 41 is in the shape of a partial sphere to form a stable rotational connection structure with the threaded excavation rod 1, and effectively prevent soil from getting stuck between the transverse swing sleeve 41 and the threaded excavation rod 1 during the use of the soil nutrient testing device, which affects the service life of the excavation head 4; and the transverse swing sleeve 41 is matched and connected with the longitudinal rotating column 423 through the longitudinal insertion holes 413 to form a stable rotational connection structure, so that the soil nutrient testing device has the effect of prolonging the service life while efficiently deepening soil sampling. At the same time, a guiding surface 414 is provided on the outer side of the lower end of the transverse swing sleeve 41. The guiding surface 414 plays an effective guiding role, so as to release the hard contact force during the process of the soil nutrient testing device excavating and obtaining soil, thereby effectively prolonging the service life.

[0039] As Figure 2 , Figure 3 , Figure 4As shown, end-side planes 421 are provided at both the upper and lower ends of the longitudinal ornament 42, and a swinging rotating column 422 is provided at the axis of the end-side plane 421 at the upper end. Among them, the rotating motor 43 is rotationally connected to the swinging rotating column 422. Therefore, the longitudinal ornament 42 is in a partial spherical shape and is connected to the rotating motor 43 through the swinging rotating column 422 on the end-side plane 421 to form a stable connection structure, and makes stable relative swinging and rotating motions under the drive of the rotating motor 43. It should be mentioned that the output shaft of the rotating motor 43 coincides with the axis of the threaded digging rod 1, and a turnover plate 431 is fixedly connected. An inclined adapter plate 432 that is inclined downward and used for rotationally connecting with the swinging rotating column 422 is provided at one end of the turnover plate 431. Then, when the rotating motor 43 operates, the circumferential rotation of the output shaft drives the turnover plate 431 to make a circumferential rotation. At this time, the inclined adapter plate 432 that is inclined downward will drive the swinging rotating column 422 to make a circumferential rotation with the output shaft of the rotating motor 43 as the axis, and when the longitudinal ornament 42 makes a circumferential rotation with the output shaft of the rotating motor 43 as the axis along with the swinging rotating column 422, the longitudinal ornament 42 makes an up-and-down rotating motion relative to the transverse swing sleeve 41, and the transverse swing sleeve 41 makes an up-and-down rotating motion relative to the threaded digging rod 1.

[0040] In order to realize the circumferential rotation of the digging cone 44 driven by the rotating motor 43, a sleeve gear 433 sleeved on the swinging rotating column 422 is provided on the lower side of the inclined adapter plate 432, and a transfer jack 424 is provided at the eccentric position of the end-side plane 421 at the upper end. Among them, a transmission rod 443 is inserted into the transfer jack 424, and meshing gears 444 and a transmission large gear 442 that mesh with the sleeve gear 433 are respectively provided at the upper and lower ends of the transmission rod 443. Correspondingly, a connecting small gear 441 that penetrates the end-side plane 421 at the lower end and meshes with the transmission large gear 442 is provided on the bottom surface of the digging cone 44. Therefore, when the inclined adapter plate 432 makes a circumferential rotation with the output shaft of the rotating motor 43 as the axis under the drive of the output shaft of the rotating motor 43, the sleeve gear 433 makes a circumferential rotation with the swinging rotating column 422 as the axis. Since the swinging rotating column 422 meshes with the meshing gear 444, and the transmission rod 443 is rotationally connected to the end-side plane 421, the sleeve gear 433 will drive the meshing gear 444 to make a circumferential rotation with the transmission rod 443 as the axis, so that the transmission large gear 442 at one end of the transmission drives the connecting small gear 441 to make a circumferential rotation, and the purpose of making the digging cone 44 fixedly connected to the connecting small gear 441 rotate and realizing loosening the contacted soil is achieved. While having a stable connection, the soil nutrient testing device has the effect of prolonging the service life while efficiently and deeply sampling the soil.

[0041] Among them, the tooth number ratio of the large transmission gear 442 to the connecting small gear 441 is greater than 1, and the tooth number ratio of the meshing gear 444 to the sleeve column gear 433 is less than or equal to 1, so that the rotation speed of the excavation cone 44 is greater than the rotation speed of the excavation head 4, so as to achieve a stable and efficient soil loosening effect, and further achieve the effect of extending the service life of the soil nutrient testing device while efficiently and deeply sampling the soil.

[0042] Embodiment 2

[0043] The difference between Embodiment 2 and Embodiment 1 is that the support mechanism in Embodiment 2 is a lifting frame. Among them, the lifting frame is provided with an automatic lifting member rotatably connected to the threaded excavation rod 1, and the pressure between the automatic lifting member and the threaded excavation rod 1 is less than the set threshold value. Therefore, when the pressure is greater than the set threshold value, the automatic lifting member runs telescopically and effectively balances the pressure. Therefore, when using this lifting frame, the lifting frame is fixed on the soil and the automatic lifting member is rotatably connected to the threaded excavation rod 1. Then, during the process of the threaded excavation rod 1 continuously advancing deep into the soil, since the pressure between the automatic lifting member and the threaded excavation rod 1 is less than the set threshold value, the automatic lifting member will automatically descend, so as to achieve the purpose of reducing the drilling difficulty, thereby significantly improving the practicability of the soil nutrient testing device.

[0044] In summary, in this application, the threaded excavation rod 1 with an excavation thread body 11 provided on its outer peripheral sidewall is driven by the driving rotator 3 to advance deep into the soil. Then, when the rotating motor 43 drives the longitudinal swing member 42 to make a circumferential rotation with the threaded excavation rod 1 as the axis, the longitudinal swing member 42 makes an up-and-down swing movement with the longitudinal rotating column 423 rotatably connected to the transverse swing sleeve 41 as the axis and the transverse swing sleeve 41 makes an up-and-down swing movement with the transverse rotating column 412 rotatably connected to the threaded excavation rod 1 as the axis; at the same time, during the operation of the longitudinal swing member 42, the rotating motor 43 is fixedly connected to the sleeve column gear 433 through the inclined adapter plate 432 connected to the output shaft, so as to drive the meshing gear 444 rotatably connected to the end-side plane 421 formed on the longitudinal swing member 42 to rotate circumferentially, so as to drive the connecting small gear 441 on the excavation cone 44 to rotate while driving the large transmission gear 442 to make a circumferential rotation movement through the meshing gear 444, thereby achieving the effects of soil loosening and significantly reducing the drilling difficulty, so that the soil nutrient testing device has the effect of extending the service life while efficiently and deeply sampling the soil.

[0045] The "first", "second", "third", "fourth", etc. (if any) involved in this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that shown or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, or device that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, or devices.

[0046] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0047] Specific examples are used herein to illustrate the principles and implementation manners of this application. The descriptions of the above embodiments are only for helping to understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, based on the idea of this application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A soil nutrient testing device, comprising a support mechanism and a threaded digging rod (1) rotatably connected to the support mechanism. Characterized in that: The threaded digging rod (1) is provided with a driving rotator (3), and a digging head (4) with an axis intersecting the axis of the threaded digging rod (1) is arranged at the bottom of the threaded digging rod (1). The digging head (4) is used for making a circumferential rotational movement around the threaded digging rod (1). The digging head (4) is provided with a digging cone (44) with an axis coinciding with the axis of the digging head (4), and the digging cone (44) makes a circumferential rotational movement along its axis; wherein, the digging head (4) includes a transverse swing sleeve (41), a longitudinal swing member (42) located in the transverse swing sleeve (41), and a rotating motor (43) for driving the digging head (4) to make a circumferential rotational movement around the threaded digging rod (1); the transverse swing sleeve (41) is provided with a transverse rotating column (412) rotatably connected to the threaded digging rod (1) up and down, the longitudinal swing member (42) is provided with a longitudinal rotating column (423) rotatably connected to the transverse swing sleeve (41) up and down, and the longitudinal rotating column (423) is perpendicular to the transverse rotating column (412); the rotating motor (43) is connected and fixed to the threaded digging rod (1) and is used for driving the digging cone (44) to make a circumferential rotational movement; the cross-section of the transverse swing sleeve (41) is circular ring-shaped, the longitudinal section is an equal-width arc-shaped, and a swing cavity (411) for matching with the longitudinal swing member (42) is formed inside; the outside of the transverse swing sleeve (41) is matched with the threaded digging rod (1) and is provided with two symmetrically distributed longitudinal insertion holes (413) for matching with the longitudinal rotating column (423).

2. The soil nutrient testing device according to claim 1, Characterized in that: A guiding surface (414) is arranged on the outer side of the lower end of the transverse swing sleeve (41).

3. The soil nutrient testing device according to claim 1, Characterized in that: Both the upper and lower ends of the longitudinal swing member (42) are provided with end-side planes (421), and a swing rotating column (422) is arranged at the axis of the end-side plane (421) located at the upper end. The rotating motor (43) is rotatably connected to the swing rotating column (422).

4. The soil nutrient testing device according to claim 3, Characterized in that: The output shaft of the rotating motor (43) coincides with the axis of the threaded digging rod (1), and a turnover plate (431) is fixedly connected. One end of the turnover plate (431) is provided with an inclined connecting plate (432) that slopes downward and is used for rotatably connecting with the swing rotating column (422).

5. The soil nutrient testing device according to claim 4, Characterized in that: A sleeve gear (433) sleeving on the swing column (422) is arranged on the lower side of the inclined adapter plate (432). An adapter socket (424) is arranged at the eccentric position of the end side plane (421) at the upper end. A transmission rod (443) is inserted into the adapter socket (424). Meshing gears (444) meshing with the sleeve gear (433) and a transmission large gear (442) are respectively arranged at the upper and lower ends of the transmission rod (443). A connecting small gear (441) penetrating through the end side plane (421) at the lower end and meshing with the transmission large gear (442) is arranged on the bottom surface of the excavation cone (44).

6. A soil nutrient testing device according to claim 5, characterized in that: the tooth number ratio of the transmission large gear (442) to the connecting small gear (441) is greater than 1, and the tooth number ratio of the meshing gear (444) to the sleeve gear (433) is less than or equal to 1.

7. A soil nutrient testing device according to claim 1, characterized in that: excavation threads (11) and depth scale lines (12) distributed along its axial direction are arranged on the outer peripheral side wall of the threaded excavation rod (1).

8. A soil nutrient testing device according to claim 1, characterized in that: the support mechanism is a hand-held handle (2) or a lifting frame; the hand-held handle (2) is provided with an adapter ring body (21) rotatably connected to the threaded excavation rod (1); the lifting frame is rotatably connected to the threaded excavation rod (1), and is provided with an automatic lifting member, and the pressure between the automatic lifting member and the threaded excavation rod (1) is less than a set threshold value.

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