Lawn soil wettability detection device

Abstract

The invention relates to the field of soil humidity detection, in particular to a lawn soil humidity detection device which comprises a shell and a detection unit. The multiple detection units are uniformly distributed on the periphery of the shell in the vertical direction of the shell, each detection unit comprises an obliquely-arranged detection rod, a sliding groove is formed in the end, facing the ground, of the detection rod in the extending direction of the detection rod, and a drill bit is slidably arranged in the sliding groove; a first gap exists between the drill bit and the bottom of the sliding groove, a first spring is arranged in the first gap, the two ends of the first spring are fixedly connected with the drill bit and the bottom of the sliding groove respectively, a sleeve is arranged outside the detection rod in a sleeving mode, the detection rod is in sliding fit with the sleeve, and the detection unit has a drilling state, a detection state and a collection state. It is guaranteed that the detection rod can make close contact with soil, and meanwhile the detection rod cannot be extruded by the soil during drilling.

Description

Technical Field

[0001] The present invention relates to the field of soil humidity detection, and specifically relates to a device for detecting the humidity of lawn soil. Background Art

[0002] When existing humidity detection instruments are detecting, it is necessary to insert the detection end of the humidity detection instrument into the soil for detection. However, the existing humidity detection instruments lack certain drilling equipment. Directly forcing the detection end of the humidity detection instrument into the soil will cause damage to the humidity detection instrument.

[0003] Chinese Patent Publication No. CN216484989U discloses a humidity detection instrument for soil detection, including a block. Detectors and electric drills are respectively arranged on both sides of the block. Rotating shafts are fixedly installed at the centers inside the detectors and the electric drills. Grooves are opened on both sides of the block at positions corresponding to the rotating shafts. The rotating shafts extend into the inner cavities of the grooves and are supported by bearings on the inner walls of the grooves. Rubber pads are fixedly installed on the inner walls of the grooves. Card slots are opened on the outer sides of the rubber pads. Limit rods are fixedly installed at the upper and lower ends inside the detectors and the electric drills. The inner sides of the limit rods extend into the inner cavities of the card slots and are clamped with the card slots. A limiting mechanism is fixedly installed on the top of the block.

[0004] Although the above solution can drill the soil in advance, the entire detection instrument is located above the soil area to be detected. When it rains outside, the rainwater will be blocked by the detection instrument, resulting in the humidity of the soil area to be detected being lower than the humidity of the surrounding soil. At the same time, the diameter of the drilled hole is larger than the diameter of the detection probe, and the drilled hole is vertical. Thus, even if the soil of the lawn is relatively soft, it is very difficult for the vertical drilled hole to shrink after being drilled. In this way, it is easy to occur that the detection probe cannot contact the side wall of the drilled hole, resulting in the situation where detection cannot be carried out. At the same time, the detection by a single detection probe has limitations. Summary of the Invention

[0005] In view of the above problems, a device for detecting the humidity of lawn soil is provided. By setting a drill bit at the lower end of the detection rod and arranging a sleeve around the detection rod, the sleeve supports the drill bit. In this way, during the drilling process of the lawn soil by the drill bit, the detection rod is always located inside the sleeve. And because the sleeve provides support for the drill bit, it is ensured that the detection rod is in a sealed environment during the entire drilling process and will not be squeezed by the soil, extending the service life of the detection rod. When detecting, the position of the detection rod remains unchanged, and the sleeve moves upward along the extension direction of the detection rod, that is, moves in the opposite direction of the drilling direction. At the beginning, the drill bit is attached to the end of the sleeve and moves synchronously with the sleeve under the action of the first spring. When the first spring is reset, the drill bit stops moving, and the sleeve continues to move, causing the detection rod to be exposed. At this time, the soil on the side wall of the inclined drilled hole begins to collapse and wraps the detection rod.

[0006] To solve the problems of the prior art, the present invention provides a lawn soil moisture detection device, which includes a housing and a detection unit arranged on the housing; there are multiple detection units, and the multiple detection units are evenly distributed around the housing in the vertical direction of the housing. The detection unit includes a detection rod arranged obliquely. A sliding groove is formed in the end of the detection rod facing the ground along the extension direction of the detection rod. A drill bit is slidably arranged in the sliding groove. There is a first gap between the drill bit and the bottom of the sliding groove. A first spring is arranged in the first gap. Two ends of the first spring are respectively fixedly connected to the drill bit and the bottom of the sliding groove. A sleeve is sleeved outside the detection rod, and the detection rod is slidably matched with the sleeve. The detection unit has a drilling state, a detection state and a retracting state. In the drilling state, the end of the sleeve facing the ground provides support for the drill bit, the detection rod moves at the same speed as the sleeve, and the first spring is in a stretched state.

[0007] Preferably, when the detection unit is in the drilling state, the drilling depth of the drill bit is preset to a rated depth. When the drill bit drills to the rated depth, the detection unit switches to the detection state, the drill bit stops drilling, and the sleeve slides up along the extension direction of the detection rod, and the sleeve is preset to a rated rising height.

[0008] Preferably, before the detection unit is in the drilling state, it is in the initial state. After the detection unit completes the detection, it switches to the retracting state. The detection rod slides up along the extension direction of the sleeve, and the detection unit returns to the initial state.

[0009] Preferably, a first pushing unit for driving the sleeve to move is arranged in the housing. A second pushing unit for driving the detection rod to move is arranged above the first pushing unit. The first pushing unit includes a first bracket, and the second pushing unit includes a second bracket. The first bracket and the second bracket are arranged vertically from bottom to top in the housing. The sleeve penetrates through the first bracket. A first gear ring is rotatably sleeved on the periphery of the sleeve. The first gear ring is rotatably arranged on the first bracket. The first gear ring is in threaded cooperation with the sleeve. The sleeve is perpendicular to the end face of the first bracket through which it penetrates. The detection rod penetrates through the second bracket and is slidably matched with the second bracket. The detection rod is perpendicular to the end face of the second bracket through which it penetrates. A second gear ring is rotatably sleeved on the periphery of the detection rod. The second gear ring is in threaded cooperation with the detection rod.

[0010] Preferably, a driving unit for driving the first pushing unit and the second pushing unit is arranged in the housing. The driving unit includes a first driving gear rotatably arranged on the first bracket. The first driving gear meshes with the first gear ring. A second driving gear is rotatably arranged on the second bracket. The second driving gear meshes with the second gear ring. A driving shaft is arranged through the axis of the first driving gear along the axis of the first driving gear. A clutch unit is arranged on the driving shaft. The driving shaft drives the first driving gear and the second driving gear to rotate through the clutch unit.

[0011] Preferably, a support ring is fixedly arranged at the lower end of the drive shaft. The axis of the support ring is collinear with the axis of the drive shaft. A third toothed ring is fixedly sleeved on the periphery of the support ring. A first gear is meshed on one side of the third toothed ring. A first rotary driver for driving the first gear to rotate is arranged at the upper end of the first gear.

[0012] Preferably, a first clutch assembly is arranged on the drive shaft. The first clutch assembly includes an inflation groove vertically opened in the upper part of the drive shaft. An air pump is arranged at the bottom of the inflation groove. A clamping block is vertically slidably arranged at the upper end of the inflation groove. A clamping groove is opened at the lower end of the second driving gear. The clamping block is in clamping fit with the clamping groove. The horizontal cross-section of the clamping block is a non-circular structure.

[0013] Preferably, a chamfer is opened at the edge of the upper end surface of the clamping block.

[0014] Preferably, a second clutch assembly is further arranged on the drive shaft. The second clutch assembly includes a limiting groove vertically opened on the side wall of the drive shaft. A clutch plate is sleeved on the periphery of the drive shaft. The clutch plate is in an annular structure, and the inner ring of the clutch plate extends into the limiting groove. The clutch plate is in sliding fit with the limiting groove in the vertical direction. The clutch plate is located below the first driving gear. A pressing unit for pushing the clutch plate to move in the vertical direction is further arranged at the lower part of the clutch plate.

[0015] Preferably, the pressing assembly includes a pressing plate vertically moving and arranged below the clutch plate. The pressing plate is in an annular structure and sleeved on the drive shaft. An extension rod is vertically fixedly arranged at the lower part of the clutch plate. The extension rod penetrates through the pressing plate and is in sliding fit with the pressing plate. A second spring is vertically arranged between the clutch plate and the pressing plate. The two ends of the second spring are respectively fixedly connected with the clutch plate and the pressing plate. The inner ring of the pressing plate extends into the limiting groove and is in sliding fit with the limiting groove. An extension sleeve is vertically fixedly arranged at the lower part of the pressing plate. A rotating sleeve is sleeved on the periphery of the extension sleeve. The inner ring side wall of the rotating sleeve is in threaded fit with the outer ring side wall of the extension sleeve. A plurality of meshing teeth are evenly opened on the outer ring side wall of the rotating sleeve around the axis of the rotating sleeve. A second gear meshing with the meshing teeth of the rotating sleeve is arranged on one side of the rotating sleeve. A second rotary driver for driving the second gear to rotate is arranged at the end of the second gear.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] 1. In the present invention, a drill bit is provided at the lower end of the detection rod, and a sleeve is provided around the detection rod to support the drill bit. In this way, during the process of drilling the lawn soil, the detection rod is always located inside the sleeve. And because the sleeve provides support for the drill bit, it ensures that the detection rod is in a sealed environment throughout the drilling process and will not be squeezed by the soil, thus extending the service life of the detection rod. When conducting detection, the position of the detection rod remains stationary, and the sleeve rises along the extension direction of the detection rod, that is, it moves in the opposite direction of the drilling direction. At the beginning, under the action of the first spring, the drill bit fits against the end of the sleeve and moves synchronously with the sleeve. When the first spring is reset, the drill bit stops moving, and the sleeve continues to move, causing the detection rod to be exposed. At this time, the soil on the inclined drilling sidewall begins to collapse and cover the detection rod, so that the detection rod can be in full contact with the soil, ensuring that the detection rod can be in close contact with the soil and will not be squeezed by the soil during drilling.

[0018] 2. By providing a drive shaft and a clutch unit, the drive shaft drives the first drive gear and the second drive gear through the clutch unit, realizing three driving modes, including driving the first drive gear alone, driving the second drive gear alone, and driving the first drive gear and the second drive gear simultaneously. When the detection unit is in the drilling rotation state, the drive shaft synchronously drives the first drive gear and the second drive gear through the clutch unit. When the detection unit switches to the detection state, the drive shaft rotates in the reverse direction, and at this time, the drive shaft can only drive the first drive gear to rotate through the clutch unit, so that the sleeve can rise along the extension direction of the detection rod. After the detection is completed, the detection unit switches to the collection state, and the drive shaft drives the second drive gear to rotate through the clutch unit, causing the detection rod to drive the drill bit to rise and reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional schematic diagram of a device for detecting the moisture content of lawn soil according to the present invention.

[0020] Figure 2 is a three-dimensional schematic diagram of the detection unit of a device for detecting the moisture content of lawn soil according to the present invention when it is in the detection state after removing the outer shell.

[0021] Figure 3 is a three-dimensional schematic diagram of the detection unit of a device for detecting the moisture content of lawn soil according to the present invention when it is in the drilling state after removing the outer shell.

[0022] Figure 4 is a side view of a device for detecting the moisture content of lawn soil according to the present invention.

[0023] Figure 5 is a Figure 4 partial enlarged schematic view of part A in a device for detecting the moisture content of lawn soil according to the present invention.

[0024] Figure 6 is a sectional three-dimensional schematic diagram of a device for detecting the moisture content of lawn soil according to the present invention.

[0025] Figure 7 is a Figure 6 partial enlarged schematic diagram at position B in the device for detecting the moisture content of lawn soil according to the present invention.

[0026] Figure 8 is a Figure 6 partial enlarged schematic diagram at position C in the device for detecting the moisture content of lawn soil according to the present invention.

[0027] Figure 9 is a three-dimensional schematic diagram of the device for detecting the moisture content of lawn soil according to the present invention after removing the outer shell and the first bracket.

[0028] Figure 10 is a sectional three-dimensional schematic diagram of the device for detecting the moisture content of lawn soil according to the present invention after removing the outer shell.

[0029] Figure 11 is a Figure 10 partial enlarged schematic diagram at position D in the device for detecting the moisture content of lawn soil according to the present invention.

[0030] The reference numerals in the figure are:

[0031] 1. Outer shell; 2. Detection unit; 21. Drill bit; 22. Detection rod; 23. Sleeve; 24. First spring; 25. First pushing unit; 251. First toothed ring; 252. First bracket; 26. Second pushing unit; 261. Second toothed ring; 262. Second bracket; 27. Driving unit; 271. First driving gear; 272. Second driving gear; 273. Driving shaft; 2731. Support ring; 2732. Third toothed ring; 2733. First gear; 2734. First rotary driver; 274. First clutch assembly; 2741. Inflatable groove; 2742. Clamping block; 2743. Clamping groove; 2744. Air pump; 275. Second clutch assembly; 2751. Clutch plate; 2752. Limiting groove; 2753. Pressing plate; 2754. Extension rod; 2755. Second spring; 2756. Extension sleeve; 2757. Rotating sleeve; 2758. Second gear; 2759. Second rotary driver. Detailed implementation manner

[0032] To further understand the features, technical means, and the specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and the detailed implementation manner.

[0033] Refer to Figure 1 、 Figure 2, Figure 4 and Figure 5 : A device for detecting the moisture content of lawn soil, comprising a housing 1 and a detection unit 2 provided on the housing 1; there are a plurality of detection units 2, and the plurality of detection units 2 are evenly distributed around the housing 1 in the vertical direction of the housing 1. The detection unit 2 includes an inclined detection rod 22. A sliding groove is formed in the end of the detection rod 22 facing the ground along the extension direction of the detection rod 22. A drill bit 21 is slidably arranged in the sliding groove. There is a first gap between the drill bit 21 and the bottom of the sliding groove. A first spring 24 is arranged in the first gap. The two ends of the first spring 24 are respectively fixedly connected to the drill bit 21 and the bottom of the sliding groove. A sleeve 23 is sleeved outside the detection rod 22, and the detection rod 22 is slidably matched with the sleeve 23. The detection unit 2 has a drilling state, a detection state and a retracting state. In the drilling state, the end of the sleeve 23 facing the ground provides support for the drill bit 21, the detection rod 22 moves at the same speed as the sleeve 23, and the first spring 24 is in a stretched state.

[0034] The moisture content of lawn soil is an important indicator for judging the state of the lawn. Existing soil moisture detection devices include fixed and handheld types. Handheld devices are usually relatively simple and cannot detect the soil moisture content of lawns for a long time. Using a fixed detection device can avoid the above situation. However, most existing fixed soil moisture detection devices are box structures. When it rains outside, the box structure is likely to block rainwater. The detection rod 22 of the fixed soil moisture detection device is basically arranged below the entire soil moisture detection device. As a result, there is a deviation when the detection rod 22 detects the moisture content, that is, the actual moisture content will be greater than the detected value. The detection rod 22 described here is made of a humidity-sensitive material, and most soil moisture detection devices only have one detection rod 22, resulting in a large influence of the detection area on the detection rod 22 during detection, and it is impossible to judge the average value of the soil moisture content of the lawn in this area. At the same time, in order to prevent the detection rod 22 from being damaged when inserted into the soil, a sleeve 23 for drilling the soil is pre-set in the existing detection device. However, the drilling of the sleeve 23 is mostly vertical drilling, and the detection rod 22 is located inside the sleeve 23, resulting in a drilling diameter larger than the diameter of the detection rod 22. As a result, the soil on the side wall of the drilled hole cannot contact the detection rod 22. At the same time, simply using the sleeve 23 for drilling will also cause soil to enter the sleeve 23, which will still cause extrusion of the detection rod 22.

[0035] To avoid the above situation, the detection unit 2 is redesigned so that during the drilling process of the detection unit 2, the detection rod 22 will not be squeezed by the soil due to drilling at all. After the drilling is completed, the detection rod 22 will then contact the soil, extending the service life of the detection rod 22. The specific structure and working process of the detection unit 2 are as follows:

[0036] Before drilling, the housing 1 is first placed on the lawn, and then the detection units 2 arranged around the housing 1 are started synchronously. First, all the detection units 2 are in the drilling state. In the drilling state, the sleeve 23 and the detection rod 22 move synchronously, and both the sleeve 23 and the detection rod 22 are in an inclined state. The lower end of the sleeve 23 is closer to the ground than the lower end of the detection rod 22. The lower end of the sleeve 23 supports the drill bit 21. A sliding groove is provided at the end of the detection rod 22. The drill bit 21 is slidably arranged in the sliding groove, and a first spring 24 is arranged in the sliding groove. At this time, the first spring 24 is in a stretched state. In this way, during the synchronous movement of the sleeve 23 and the detection rod 22 towards the ground, the detection rod 22 will never be squeezed by the soil. This is because when the drill bit 21 contacts the lawn soil, the extrusion force of the lawn soil on the drill bit 21 will only be transmitted to the sleeve 23, ensuring that the detection rod 22 will never be squeezed by the soil during drilling and avoiding damage to the detection rod 22 during drilling. When the detection unit 2 is in the drilling state, the depth of the drill bit 21 drilled into the soil is preset with a rated depth. When the drill bit 21 drills to the rated depth, the sleeve 23 stops moving, and the detection rod 22 that moves synchronously with the sleeve 23 also stops moving. Then the sleeve 23 starts to rise, and the detection rod 22 remains stationary. The first spring 24 drives the drill bit 21 to rebound during the reset process, avoiding the difficulty of separating the drill bit 21 from the soil due to too long adhesion time. As the sleeve 23 rises, the detection rod 22 is exposed. Since both the sleeve 23 and the detection rod 22 are inclined, after the sleeve 23 is withdrawn from the drill hole, the soil on the inclined drill hole side wall begins to collapse and wraps the detection rod 22, thus ensuring that the detection rod 22 can be in close contact with the soil and will not be squeezed by the soil during drilling.

[0037] It should be noted that the drilling is not to make the drill bit 21 and the sleeve 23 rotate and drill, but to directly insert into the soil, because the diameter of the detection rod 22 is mostly 0.5 - 2 cm, and at the same time the soil of the lawn is relatively soft, so the sleeve 23 and the drill bit 21 can directly insert into the soil.

[0038] Refer to Figures 1 - 11 : When the detection unit 2 is in the drilling state, the drilling depth of the drill bit 21 is preset with a rated depth. When the drill bit 21 drills to the rated depth, the detection unit 2 switches to the detection state, the drill bit 21 stops drilling, and the sleeve 23 slides up along the extension direction of the detection rod 22, and the sleeve 23 is preset with a rated rising height.

[0039] When the sleeve 23 rises to the rated rising height, at this time the height of the sleeve 23 is the same as the height of the sleeve 23 before drilling, the detection rod 22 located in the sleeve 23 is exposed, and the soil on the drill hole side wall begins to collapse during the rising process of the sleeve 23, because the soil of the lawn is relatively soft, so the collapsed soil can wrap the detection rod 22.

[0040] Refer to Figures 1 - 11 : When the detection unit 2 is in the initial state before the drilling state, after the detection unit 2 completes the detection, it switches to the charging state, the detection rod 22 slides and rises along the extension direction of the sleeve 23, and the detection unit 2 returns to the initial state.

[0041] When the detection unit 2 is in the initial state, the drill bit 21 is above the lawn soil, the heights of the detection rod 22 and the sleeve 23 rise to the highest position. At this time, the lower end of the sleeve 23 contacts the drill bit 21, and the first spring 24 is in a stretched state.

[0042] Refer to Figure 2 and Figure 3 : A first pushing unit 25 for driving the sleeve 23 to move is arranged in the housing 1, and a second pushing unit 26 for pushing the detection rod 22 to move is arranged above the first pushing unit 25. The first pushing unit 25 includes a first bracket 252, and the second pushing unit 26 includes a second bracket 262. The first bracket 252 and the second bracket 262 are arranged vertically one above the other in the housing 1. The sleeve 23 passes through the first bracket 252. A first gear ring 251 is rotatably sleeved on the outer periphery of the sleeve 23. The first gear ring 251 is rotatably arranged on the first bracket 252. The first gear ring 251 is in threaded cooperation with the sleeve 23. The sleeve 23 is perpendicular to the end face of the first bracket 252 through which it passes. The detection rod 22 passes through the second bracket 262 and is in sliding cooperation with the second bracket 262. The detection rod 22 is perpendicular to the end face of the second bracket 262 through which it passes. A second gear ring 261 is rotatably sleeved on the outer periphery of the detection rod 22. The second gear ring 261 is in threaded cooperation with the detection rod 22.

[0043] It should be noted that the sleeve 23 cannot rotate around its own axis, and the detection rod 22 cannot rotate around its own axis either. Thus, when the first gear ring 251 rotates, the sleeve 23 can slide on the first bracket 252, and when the second gear ring 261 rotates, the detection rod 22 can slide on the second bracket 262.

[0044] Refer to Figure 5 and Figure 6: Inside the outer shell 1, a driving unit 27 is provided for driving the first pushing unit 25 and the second pushing unit 26. The driving unit 27 includes a first driving gear 271 rotatably arranged on the first bracket 252. The first driving gear 271 meshes with the first toothed ring 251. A second driving gear 272 is rotatably arranged on the second bracket 262. The second driving gear 272 meshes with the second toothed ring 261. A driving shaft 273 is penetrated along the axis of the first driving gear 271 on the first driving gear 271. A clutch unit is arranged on the driving shaft 273. The driving shaft 273 drives the first driving gear 271 and the second driving gear 272 to rotate through the clutch unit.

[0045] Refer to Figure 9 、 Figure 10 and Figure 11 : A support ring 2731 is fixedly arranged at the lower end of the driving shaft 273. The axis of the support ring 2731 is collinear with the axis of the driving shaft 273. A third toothed ring 2732 is fixedly sleeved on the periphery of the support ring 2731. A first gear 2733 meshes with one side of the third toothed ring 2732. A first rotary driver 2734 for driving the first gear 2733 to rotate is arranged at the upper end of the first gear 2733.

[0046] The first rotary driver 2734 is preferably a servo motor. After the first rotary driver 2734 is started, the first rotary driver 2734 drives the third toothed ring 2732 to rotate through the first gear 2733. The third toothed ring 2732 drives the driving shaft 273 to rotate through the support ring 2731, so that the driving shaft 273 rotates forward or backward. When the detection unit 2 is in the drilling rotation state, the driving shaft 273 synchronously drives the first driving gear 271 and the second driving gear 272 through the clutch unit. When the detection unit 2 switches to the detection state, the driving shaft 273 rotates reversely, and at this time, the driving shaft 273 can only drive the first driving gear 271 to rotate through the clutch unit, so that the sleeve 23 can rise along the extension direction of the detection rod 22. After the detection is completed, the detection unit 2 switches to the collection state, and the driving shaft 273 drives the second driving gear 272 to rotate through the clutch unit, so that the detection rod 22 drives the drill bit 21 to rise and reset.

[0047] Refer to Figure 5 、 Figure 7 、 Figure 8 and Figure 10: A first clutch assembly 274 is provided on the drive shaft 273. The first clutch assembly 274 includes an inflation groove 2741 formed in the upper part of the drive shaft 273 in the vertical direction. An air pump 2744 is provided at the bottom of the inflation groove 2741. A clamping block 2742 is vertically slidably provided at the upper end of the inflation groove 2741. A clamping groove 2743 is formed at the lower end of the second drive gear 272. The clamping block 2742 is in clamping fit with the clamping groove 2743, and the horizontal cross-section of the clamping block 2742 is a non-circular structure.

[0048] The air pump 2744 inflates the inflation groove 2741 or discharges the air in the inflation groove 2741, so that the clamping block 2742 in the inflation groove 2741 moves in the vertical direction, thereby realizing the clamping fit between the clamping block 2742 and the clamping groove 2743.

[0049] Refer to Figures 1 - 11 : A chamfer is formed at the edge of the upper end surface of the clamping block 2742.

[0050] This ensures that the clamping block 2742 is more easily inserted into the clamping groove 2743.

[0051] Refer to Figure 5 and Figure 8 : A second clutch assembly 275 is further provided on the drive shaft 273. The second clutch assembly 275 includes a limiting groove 2752 formed in the side wall of the drive shaft 273 in the vertical direction. A clutch plate 2751 is sleeved around the drive shaft 273. The clutch plate 2751 is in an annular structure, and the inner ring of the clutch plate 2751 extends into the limiting groove 2752. The clutch plate 2751 is in vertical sliding fit with the limiting groove 2752. The clutch plate 2751 is located below the first drive gear 271. A pressing unit for pushing the clutch plate 2751 to move in the vertical direction is further provided at the lower part of the clutch plate 2751.

[0052] Refer to Figure 8:The pressing component includes a pressing plate 2753 that is movably arranged vertically below the clutch plate 2751. The pressing plate 2753 is of an annular structure and sleeved on the drive shaft 273. An extension rod 2754 is fixedly arranged vertically at the lower part of the clutch plate 2751. The extension rod 2754 penetrates through the pressing plate 2753 and is in sliding fit with the pressing plate 2753. A second spring 2755 is vertically arranged between the clutch plate 2751 and the pressing plate 2753. The two ends of the second spring 2755 are respectively fixedly connected to the clutch plate 2751 and the pressing plate 2753. The inner ring of the pressing plate 2753 extends into the limiting groove 2752 and is in sliding fit with the limiting groove 2752. An extension sleeve 2756 is vertically fixedly arranged at the lower part of the pressing plate 2753. A rotating sleeve 2757 is sleeved on the periphery of the extension sleeve 2756. The inner ring side wall of the rotating sleeve 2757 is in threaded fit with the outer ring side wall of the extension sleeve 2756. A plurality of meshing teeth are evenly arranged on the outer ring side wall of the rotating sleeve 2757 around the axis of the rotating sleeve 2757. A second gear 2758 that meshes with the meshing teeth of the rotating sleeve 2757 is arranged on one side of the rotating sleeve 2757. A second rotation driver 2759 for driving the second gear 2758 to rotate is arranged at the end of the second gear 2758.

[0053] The second rotation driver 2759 is preferably a servo motor. When the second rotation driver 2759 drives the extension sleeve 2756 to rise vertically through the rotating sleeve 2757, the pressing plate 2753 squeezes the clutch plate 2751 through the second spring 2755, so that the clutch plate 2751 can tightly press against the lower end of the first drive gear 271, thereby realizing the driving of the first drive gear 271.

[0054] Working principle: Before drilling, the housing 1 is placed on the lawn, and then the detection units 2 arranged around the housing 1 are started synchronously. First, all the detection units 2 are in the drilling state. In the drilling state, the sleeve 23 and the detection rod 22 move synchronously, and both the sleeve 23 and the detection rod 22 are in an inclined state. The lower end of the sleeve 23 is closer to the ground than the lower end of the detection rod 22. The lower end of the sleeve 23 supports the drill bit 21. A sliding groove is provided at the end of the detection rod 22. The drill bit 21 is slidably arranged in the sliding groove, and a first spring 24 is arranged in the sliding groove. At this time, the first spring 24 is in a stretched state. In this way, during the synchronous movement of the sleeve 23 and the detection rod 22 towards the ground, the detection rod 22 will never be squeezed by the soil. This is because when the drill bit 21 contacts the lawn soil, the extrusion force of the lawn soil on the drill bit 21 will only be transmitted to the sleeve 23, ensuring that the detection rod 22 will never be squeezed by the soil during the drilling process and avoiding damage to the detection rod 22 during the drilling process. When the detection unit 2 is in the drilling state, the depth of the drill bit 21 drilled into the soil is preset with a rated depth. When the drill bit 21 drills to the rated depth, the sleeve 23 stops moving, and the detection rod 22 that moves synchronously with the sleeve 23 also stops moving. Then the sleeve 23 starts to rise, and the detection rod 22 remains stationary. The first spring 24 drives the drill bit 21 to rebound during the reset process, avoiding the drill bit 21 being difficult to separate due to long-term adhesion to the soil. As the sleeve 23 rises, the detection rod 22 is exposed. Since both the sleeve 23 and the detection rod 22 are inclined, after the sleeve 23 is withdrawn from the drill hole, the soil on the inclined drill hole sidewall begins to collapse and wrap the detection rod 22, thus ensuring that the detection rod 22 can be in close contact with the soil and will not be squeezed by the soil during drilling.

[0055] The above embodiments only represent one or several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A lawn soil moisture detection device, comprising a housing (1) and a detection unit (2) provided on the housing (1); It is characterized in that A plurality of detection units (2) are provided, and the plurality of detection units (2) are evenly distributed around the housing (1) in the vertical direction of the housing (1). The detection unit (2) includes an inclined detection rod (22). A sliding groove is formed in the end of the detection rod (22) facing the ground along the extending direction of the detection rod (22). A drill bit (21) is slidably arranged in the sliding groove. There is a first gap between the drill bit (21) and the bottom of the sliding groove. A first spring (24) is arranged in the first gap. The two ends of the first spring (24) are fixedly connected to the drill bit (21) and the bottom of the sliding groove respectively. A sleeve (23) is sleeved outside the detection rod (22). The detection rod (22) is slidably matched with the sleeve (23). The detection unit (2) has a drilling state, a detection state and a receiving state. In the drilling state, the end of the sleeve (23) facing the ground provides support for the drill bit (21), and the detection rod (22) moves at the same speed as the sleeve (23), and the first spring (24) is in a stretched state.

2. The lawn soil moisture detection device according to claim 1, characterized in that, When the detection unit (2) is in the drilling state, the drilling depth of the drill bit (21) is preset to a rated depth. When the drill bit (21) drills to the rated depth, the detection unit (2) switches to the detection state, the drill bit (21) stops drilling, and the sleeve (23) slides upward along the extending direction of the detection rod (22), and the sleeve (23) is preset with a rated rising height.

3. The lawn soil moisture detection device according to claim 1, wherein, Before the detection unit (2) is in the drilling state, it is in the initial state. After the detection unit (2) completes the detection, it switches to the receiving state. The detection rod (22) slides upward along the extending direction of the sleeve (23), and the detection unit (2) returns to the initial state.

4. The lawn soil moisture detection device according to claim 1, characterized in that, A first pushing unit (25) for driving the sleeve (23) to move is arranged in the housing (1). A second pushing unit (26) for pushing the detection rod (22) to move is arranged above the first pushing unit (25). The first pushing unit (25) includes a first bracket (252), and the second pushing unit (26) includes a second bracket (262). The first bracket (252) and the second bracket (262) are arranged vertically from bottom to top in the housing (1). The sleeve (23) penetrates through the first bracket (252). A first tooth ring (251) is rotatably sleeved (2757) on the periphery of the sleeve (23). The first tooth ring (251) is rotatably arranged on the first bracket (252). The first tooth ring (251) is in threaded cooperation with the sleeve (23). The sleeve (23) is perpendicular to the end face of the first bracket (252) it penetrates. The detection rod (22) penetrates through the second bracket (262) and is slidably matched with the second bracket (262). The detection rod (22) is perpendicular to the end face of the second bracket (262) it penetrates. A second tooth ring (261) is rotatably sleeved (2757) on the periphery of the detection rod (22). The second tooth ring (261) is in threaded cooperation with the detection rod (22).

5. The lawn soil moisture detection device according to claim 4, wherein Inside the housing (1), a driving unit (27) for driving the first pushing unit (25) and the second pushing unit (26) is provided. The driving unit (27) includes a first driving gear (271) rotatably arranged on the first bracket (252). The first driving gear (271) meshes with the first toothed ring (251). A second driving gear (272) is rotatably arranged on the second bracket (262), and the second driving gear (272) meshes with the second toothed ring (261). A driving shaft (273) is arranged through the axis of the first driving gear (271) along the axis of the first driving gear (271). A clutch unit is arranged on the driving shaft (273), and the driving shaft (273) drives the first driving gear (271) and the second driving gear (272) to rotate through the clutch unit.

6. The lawn soil moisture detection device according to claim 5, characterized in that, A support ring (2731) is fixedly arranged at the lower end of the driving shaft (273). The axis of the support ring (2731) is collinear with the axis of the driving shaft (273). A third toothed ring (2732) is fixedly sleeved on the periphery of the support ring (2731). A first gear (2733) meshes with one side of the third toothed ring (2732). A first rotary driver (2734) for driving the first gear (2733) to rotate is arranged at the upper end of the first gear (2733).

7. The lawn soil moisture detection device according to claim 5, wherein A first clutch assembly (274) is arranged on the driving shaft (273). The first clutch assembly (274) includes an inflation groove (2741) opened in the upper part of the driving shaft (273) along the vertical direction. An air pump (2744) is arranged at the bottom of the inflation groove (2741). A clamping block (2742) is arranged to slide vertically at the upper end of the inflation groove (2741). A clamping groove (2743) is opened at the lower end of the second driving gear (272). The clamping block (2742) is in clamping fit with the clamping groove (2743). The horizontal cross-section of the clamping block (2742) is a non-circular structure.

8. The lawn soil moisture detection device according to claim 7, characterized in that, A chamfer is opened at the edge of the upper end surface of the clamping block (2742).

9. The lawn soil moisture detection device according to claim 6, characterized in that, A second clutch assembly (275) is further arranged on the driving shaft (273). The second clutch assembly (275) includes a limiting groove (2752) opened on the side wall of the driving shaft (273) along the vertical direction. A clutch plate (2751) is sleeved on the periphery of the driving shaft (273). The clutch plate (2751) is in an annular structure, and the inner ring of the clutch plate (2751) extends into the limiting groove (2752). The clutch plate (2751) is in sliding fit with the limiting groove (2752) along the vertical direction. The clutch plate (2751) is located below the first driving gear (271). A pressing unit for pushing the clutch plate (2751) to move vertically is further arranged at the lower part of the clutch plate (2751).

10. The lawn soil moisture detection device according to claim 9, characterized in that, The pressing component includes a pressing plate (2753) movably arranged vertically below the clutch plate (2751). The pressing plate (2753) is of an annular structure and sleeved on the driving shaft (273). An extension rod (2754) is fixedly arranged vertically at the lower part of the clutch plate (2751). The extension rod (2754) penetrates through the pressing plate (2753) and is in sliding fit with the pressing plate (2753). A second spring (2755) is vertically arranged between the clutch plate (2751) and the pressing plate (2753). The two ends of the second spring (2755) are respectively fixedly connected with the clutch plate (2751) and the pressing plate (2753). The inner ring of the pressing plate (2753) extends into the limiting groove (2752) and is in sliding fit with the limiting groove (2752). An extension sleeve (2756) is vertically and fixedly arranged at the lower part of the pressing plate (2753). A rotating sleeve (2757) is sleeved on the periphery of the extension sleeve (2756). The inner ring side wall of the rotating sleeve (2757) is in threaded fit with the outer ring side wall of the extension sleeve (2756). A plurality of meshing teeth are evenly arranged on the outer ring side wall of the rotating sleeve (2757) around the axis of the rotating sleeve (2757). A second gear (2758) meshing with the meshing teeth of the rotating sleeve (2757) is arranged on one side of the rotating sleeve (2757). A second rotary driver (2759) for driving the second gear (2758) to rotate is arranged at the end of the second gear (2758).

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