A garlic root cutting device

Abstract

This invention relates to the field of agricultural machinery, and particularly to a garlic root-cutting device, comprising a frame, a positioning and transmission device, an automatic adjustment device, a root-cutting device, and a transmission device. The positioning and transmission device, comprising a first floating positioning and transmission mechanism, a second floating positioning and transmission mechanism, a left positioning and transmission mechanism, and a right positioning and transmission mechanism arranged in an X-shape, clamps the garlic head in four directions during garlic transport and cuts and positions it based on the root below the garlic head. The automatic adjustment device, installed near the positioning and transmission device, detects the garlic diameter and automatically adjusts the relative distance between the garlic root-cutting blade and the garlic root according to the garlic diameter. This invention has a compact structure and can be used for cutting garlic roots with varying diameters, suitable for harvesting garlic at different planting depths, and can be used in large garlic combine harvesters or as a standalone garlic root-cutting device.

Description

Technical Field

[0001] This invention relates to agricultural machinery, and more particularly to a device for cutting the roots of garlic. Background Technology

[0002] Garlic is a widely cultivated economic crop in my country. Currently, garlic harvesters are generally capable of digging up garlic and cutting its stems, but the effect of cutting garlic roots is not ideal. Patents such as 2019213348393 and 2019208305237 use the garlic stem as the cutting reference, i.e., the position of the clamped garlic stalk. When garlic is planted deep or the garlic head is large, too much root is cut, sometimes even damaging the garlic head. When garlic is planted shallow or the garlic head is small, the roots are not completely removed. The main reason for this is that when cutting the garlic roots, the blade is relatively close to the garlic head when the head is large, and relatively far away when the head is small. The blade cannot automatically adjust the position of the garlic root relative to the cutting blade according to the size of the garlic head. Therefore, the shortcomings of existing technology hinder the development of mechanized garlic harvesting to some extent. Root cutting mainly relies on manual labor, which is labor-intensive and inefficient. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problems of inaccurate positioning and poor adaptability of existing garlic harvesters and garlic root cutting machines. It proposes a technical solution that uses the garlic root as the cutting positioning reference and can automatically adjust the distance between the cutting blade and the garlic root according to the diameter of the garlic head, so that the garlic root can be cleanly cut and adapts to the situation of garlic heads of different sizes and planting depths.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: a garlic root cutting device, comprising an X-shaped frame, with guide rails respectively provided on the four branches of the frame; a first floating transmission device and a second floating transmission device are symmetrically installed on the upper two branches of the X-shaped frame, and the first floating transmission device and the second floating transmission device can move independently along their respective guide rails; a first positioning transmission device and a second positioning transmission device are symmetrically installed on the lower two branches of the X-shaped frame; a gap for garlic stems to pass through is provided between the first floating transmission device and the second floating transmission device, and a gap for garlic roots to pass through is provided between the first positioning transmission device and the second positioning transmission device. The gap is filled with the first floating transmission device, the second floating transmission device, the first positioning transmission device, and the second positioning transmission device arranged in an X-shape. The lower side of the first floating transmission device and the upper side of the first positioning transmission device and the second positioning transmission device are for the garlic head to pass through. The upper side of the first positioning transmission device and the second positioning transmission device is used as the positioning reference for cutting the roots of the garlic. A root-cutting device is installed on the frame at the cutting positioning reference determined on the upper side of the first positioning transmission device and the second positioning transmission device. An automatic positioning adjustment device is installed on the frame on the upper side of the first positioning transmission device and the second positioning transmission device to automatically adjust the distance between the garlic head and the root-cutting device according to the diameter of the garlic head.

[0005] As a preferred embodiment of the present invention, the first floating transmission device and the second floating transmission device are symmetrical devices with the same structure, including a floating mounting base that moves along the guide rail, a driving bevel gear and a driven bevel gear meshing with it installed in the floating mounting base, a floating positioning transmission mechanism installed on the driven bevel gear, and a spring that causes the floating mounting base to carry the floating positioning transmission mechanism toward the root cutting device. When garlic passes by, the floating positioning transmission mechanism exerts pressure on the garlic, thereby causing the garlic to adhere tightly to the first positioning transmission device and the second positioning transmission device.

[0006] As a preferred embodiment of the present invention, the angle between the rotation plane of the floating positioning transmission mechanism of the first floating transmission device and the rotation plane of the floating positioning transmission mechanism of the second floating transmission device is greater than or equal to 0 degrees and less than 180 degrees.

[0007] As a preferred embodiment of the present invention, the first positioning transmission device and the second positioning transmission device are symmetrical structures with the same structure. Each includes a positioning mounting base, a driving bevel gear and a driven bevel gear meshing with it installed in the positioning mounting base, a positioning transmission mechanism installed on the driven bevel gear, and a spring installed outside the positioning mounting base to move the positioning mounting base carrying the positioning transmission mechanism toward the first floating transmission device and the second floating transmission device.

[0008] Furthermore, the angle between the rotation plane of the positioning transmission mechanism of the first positioning transmission device and the rotation plane of the positioning transmission mechanism of the second positioning transmission device is greater than or equal to 0 degrees and less than 180 degrees.

[0009] The root cutting device of the present invention includes a root cutting blade, a root cutting motor, and a mounting base for mounting the root cutting blade and the root cutting motor, which is mounted on a shaft between the root cutting blade and the motor spindle.

[0010] The automatic adjustment device described in this invention is a device capable of adjusting the distance between the garlic clove and the root-cutting blade.

[0011] In a preferred embodiment of the present invention, the automatic adjustment device includes a probe rod for detecting the diameter of a garlic bulb, an adjusting rod connected to the probe rod, and a fork rod hinged to one end of the adjusting rod. The other end of the fork rod engages with a positioning mounting base, causing the positioning mounting base to move. The fork rod is hinged to a fork rod seat on the frame via a pin. When the garlic bulb has a large diameter, it pushes the probe rod outward a greater distance, causing the adjusting rod to move outward further. This, in turn, causes the fork rod to push the positioning mounting base outward, increasing the distance between the positioning transmission mechanisms on both sides of the lower end of the garlic bulb. This causes the garlic bulb to move downward a certain distance relative to the positioning transmission mechanisms, thereby eliminating the positioning inaccuracy problem caused by the diameter of the garlic bulb.

[0012] As a preferred embodiment of the present invention, the floating positioning transmission mechanism and the positioning transmission mechanism have the same edge linear velocity, that is, the magnitude is equal and the direction is both pointing towards the root cutting blade.

[0013] As a preferred embodiment of the present invention, the floating positioning and transmission mechanism is a roller, and a roller made of a soft material is preferred to protect the garlic head.

[0014] As another preferred embodiment of the present invention, the floating positioning transmission mechanism is a transmission belt or a transmission chain.

[0015] In a preferred embodiment of the present invention, the positioning and transmission mechanism is a roller.

[0016] As another preferred embodiment of the present invention, the positioning and transmission mechanism is a transmission belt or a transmission chain.

[0017] In addition to the aforementioned mechanisms or devices, the present invention also includes a positioning drive shaft for transmitting fixed force to the first positioning transmission device and the second positioning transmission device respectively, a floating transmission shaft for transmitting power to the first upper floating transmission device and the second upper floating transmission device respectively, and a universal joint installed between the positioning drive shaft and the floating rotating shaft.

[0018] In a preferred embodiment of the present invention, the positioning transmission shaft and the floating rotation shaft are splined shafts.

[0019] Another way to achieve the purpose of this invention is to fix the garlic clove in place and move the garlic root-cutting blade according to the diameter of the garlic clove, thereby automatically adjusting the distance between the root-cutting blade and the garlic root.

[0020] Compared with the prior art, the beneficial effects of the technical solution described in this invention are: 1) This invention adopts an X-shaped distributed floating positioning transmission mechanism and a positioning transmission mechanism, so that the garlic is evenly clamped from four sides when the roots are cut, which is stable and reliable, and the garlic head near the roots is used as the positioning reference for cutting and positioning, so that the root cutting and positioning are accurate.

[0021] 2) The automatic adjustment device of the present invention can automatically adjust the distance between the garlic root and the root cutting blade according to the diameter of the garlic head, thereby achieving precise cutting and effectively solving the problems in existing harvesting machinery;

[0022] 3) This invention has a compact structure and strong adaptability. It can be used in garlic harvesters or as a garlic root cutting device. It can also be used as a harvesting device for bulbous root crops such as onions. It is highly versatile and suitable for situations where garlic bulbs have inconsistent diameters and planting depths. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of a garlic root-cutting device with an X-shaped roller structure.

[0024] Figure 2 This is a front view of a garlic root-cutting device.

[0025] Figure 3 This is a front view of a garlic root-cutting device with some components concealed.

[0026] Figure 4 This is a front view of a garlic root-cutting device equipped with a detection wheel.

[0027] Figure 5 This is a schematic diagram of an X-shaped frame.

[0028] Figure 6 This is a three-dimensional schematic diagram of a garlic root-cutting device with a conveyor belt structure.

[0029] Figure 7 This is a 3D schematic diagram of a garlic root-cutting device hidden behind a frame.

[0030] Figure 8 A schematic diagram defining the diameter of a garlic clove.

[0031] Figure 9 A schematic diagram illustrating the principle of dynamic adjustment for positioning and cutting garlic roots.

[0032] Figure 10 This is a three-dimensional schematic diagram of an adjustable garlic root cutter.

[0033] The components include: 1. Frame; 2. First floating transmission device; 3. Second floating transmission device; 4. First positioning transmission device; 5. Second positioning transmission device; 6. Automatic positioning adjustment device; 7. Root cutting device; 8. Transmission device; 1-1 First guide rail; 1-2 Second guide rail; 1-3 Third guide rail; 1-4 Fourth guide rail; 2-1 First floating mounting base; 2-2 First driving bevel gear; 2-3 First driven bevel gear; 2-4 First floating positioning transmission mechanism; 2-5 First elastic device; 3-1 Second floating mounting base; 3-2 Second driving bevel gear; 3-3 Second driven bevel gear; 3-4 Second floating positioning transmission mechanism; 3-5 Second elastic device; 4-1 First positioning mounting base; 4 -2 Third driving bevel gear, 4-3 Third driven bevel gear, 4-4 Left positioning transmission mechanism, 4-5 Third elastic device, 5-1 Second positioning mounting base, 5-2 Fourth driving bevel gear, 5-3 Fourth driven bevel gear, 5-4 Right positioning transmission mechanism, 5-5 Fourth elastic device, 6-1 Detector rod, 6-2 Adjusting rod, 6-3 Shift fork rod, 6-4 Shift lever mounting base, 6-5 Detector roller, 7-1 Cutting blade, 7-2 Cutting motor, 7-3 Cutting spindle, 8-1 Positioning transmission shaft, 8-2 Floating transmission shaft, 8-3 Universal joint, 6-6 Wire rope, 6-8 Adjusting gear, 6-9 Adjusting rack, 6-10 Cutting device adjusting guide rail, 6-11 Fixed base. Detailed Implementation

[0034] To avoid misunderstanding, the garlic diameter mentioned in this invention refers to the maximum circular diameter projected onto a plane perpendicular to the stem of the garlic bulb. Figure 8 As shown. Figure 9 As shown, the positioning limiting plane of the present invention is a plane passing through the tangent point between the garlic head and the positioning transmission mechanism, and this plane is perpendicular to the normal at the tangent point of the garlic head.

[0035] The following is combined Figure 9The working principle of the technical solution of the present invention is as follows: When cutting the garlic root with a diameter of D1, the pressure at B1 and B2 causes the garlic head D1 to be tangent to the positioning limiting plane h at point A. At this time, the plane on which the root cutting blade rotates is L1, that is, L1 is the actual cutting plane. When the diameter of the garlic to be cut increases to D2, if the positioning limiting plane h remains unchanged, the garlic with a diameter of D2 is tangent to the positioning limiting plane at point A'. Since the garlic diameter D2 is greater than D1, the cutting point A' is higher than point A. At this time, the rotation plane of the garlic root cutting blade needs to be moved from L1 to L1' in order to remove the garlic root cleanly without damaging the garlic. Therefore, two solutions can be implemented. One solution is to convert the change in garlic diameter into the movement of the positioning limiting plane, that is, to move the positioning limiting plane h outwards to h', so that garlic D2 moves downwards with the positioning limiting plane under the pressure at B1' and B2', and the cutting point after the downward movement is A″, thus bringing the plane L1' that actually needs to be cut back to L1. That is, while keeping the position of the cutting blade unchanged, the same cutting effect as garlic diameter D1 is achieved. The other solution adopted by this invention is to convert the change in garlic diameter into the vertical movement distance of the cutting blade, that is, while keeping the garlic relative to the positioning limiting plane h unchanged, the cutting blade is adjusted to L1'. The two solutions are only different in the object being adjusted, but the effect is the same.

[0036] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0037] The first technical solution to achieve the intent of this invention is as follows:

[0038] like Figures 1 to 7As shown, the technical solution adopted by the present invention is: a garlic root-cutting device, including a frame, a positioning and transmission device, an automatic adjustment device, a root-cutting device, and a transmission device. The frame is X-shaped, with a first guide rail 1-1, a second guide rail 1-2, a third guide rail 1-3, and a fourth guide rail 1-4 respectively arranged in four branch directions. The first guide rail 1-1 and the second guide rail 1-2 are respectively equipped with a first floating transmission device 2 and a second floating transmission device 3, while the third guide rail 1-3 and the fourth guide rail 1-4 are respectively equipped with a first positioning transmission device 4 and a second positioning transmission device 5. The first floating transmission device 2, the second floating transmission device 3, the first positioning transmission device 4, and the second positioning transmission device 5 together constitute an X-shaped garlic positioning and transmission device. The first floating transmission device 2... The lower side of the two floating transmission devices 3 and the upper side of the first positioning transmission device 4 and the second positioning transmission device 5 are provided with channels for garlic heads to pass through. The plane that is tangent to the upper circumference of the first positioning transmission device 4 and the second positioning transmission device 5 and parallel to the direction of garlic movement is used as the positioning limiting plane h for cutting the roots of garlic. A root-cutting device 7 is installed on the frame 1 at an appropriate position near the first positioning transmission device 4 and the second positioning transmission device 5. An automatic positioning adjustment device 6 is installed on the frame 1 above the first positioning transmission device 4 and the second positioning transmission device 5 to automatically adjust the distance between the garlic head and the root-cutting device 7 according to the diameter of the garlic head.

[0039] As a preferred embodiment of the present invention, the first floating transmission device 2 and the second floating transmission device 3 are symmetrical devices with identical structures, and the first floating transmission device 2 and the second floating transmission device 3 are installed face to face with a space between them for garlic stalks to pass through. The first floating transmission device 2 includes a floating mounting base 2-1 that moves along the first guide rail 1-1, a first driving bevel gear 2-2 and a first driven bevel gear 2-3 meshing with it installed in the first floating mounting base 2-1, a first floating positioning transmission mechanism 2-4 installed on the first driven bevel gear 2-3, and an elastic device 2-5 that causes the first floating mounting base 2-1 to carry the first floating positioning transmission mechanism 2-4 toward the root cutting device 7; the second floating transmission device 3 includes a second floating mounting base 3-1 that moves along the second guide rail 1-2, a second driving bevel gear 3-2 and a second driven bevel gear 3-3 meshing with it installed in the second floating mounting base 3-1, a second floating positioning transmission mechanism 3-4 installed on the second driven bevel gear 3-3, and an elastic device 3-5 that causes the second floating mounting base 3-1 to carry the second floating positioning transmission mechanism 3-4 toward the root cutting device 7; when garlic passes by, the left and right floating positioning transmission mechanisms simultaneously exert pressure on the garlic, thereby causing the garlic to adhere tightly to the positioning plane defined by the first positioning transmission device 4 and the second positioning transmission device 5.

[0040] As a preferred embodiment of the present invention, the included angle between the rotation plane of the first floating positioning transmission mechanism 2-4 of the first floating transmission device 2 and the rotation plane of the second floating positioning transmission mechanism 3-4 of the second floating transmission device 3 is greater than or equal to 0 degrees and less than 180 degrees.

[0041] In a preferred embodiment of the present invention, the first positioning transmission device 4 and the second positioning transmission device 5 are identical in structure and are planar symmetrical about the centerline of the garlic stem and the direction of movement. A gap is provided between the first positioning transmission device 4 and the second positioning transmission device 5 for the garlic roots to pass through. The first positioning transmission device 4 includes a first positioning mounting base 4-1, a third driving bevel gear 4-2 and a third driven bevel gear 4-3 meshing with it, a left positioning transmission mechanism 4-4 mounted on the third driven bevel gear 4-3, and a third elastic device 4-5 mounted outside the first positioning mounting base 4-1 to move the first positioning mounting base 4-1 carrying the left positioning transmission mechanism 4-4 toward the first floating transmission device 2 and the second floating transmission device 3. The second positioning and transmission device 5 includes a second positioning mounting base 5-1, a fourth driving bevel gear 5-2 and a fourth driven bevel gear 5-3 meshing with it, a right positioning and transmission mechanism 5-4 mounted on the fourth driven bevel gear 5-3, and a fourth elastic device 6-5 mounted outside the second positioning mounting base 5-1 to move the second positioning mounting base 5-1 carrying the right positioning and transmission mechanism 5-4 toward the first floating transmission device 2 and the second floating transmission device 3.

[0042] Furthermore, the angle between the positioning limiting plane determined by the left positioning transmission mechanism 4-4 of the first positioning transmission device 4 and the positioning limiting plane determined by the right positioning transmission mechanism of the second positioning transmission device 5 is greater than or equal to 0 degrees and less than 180 degrees.

[0043] As a preferred embodiment of the present invention, the angle between the rotation plane of the left positioning transmission mechanism 4-4 of the first positioning transmission device 4 and the rotation plane of the right positioning transmission mechanism of the second positioning transmission device 5 is greater than or equal to 0 degrees and less than 180 degrees, that is, the angle between the rotation axes of the two positioning transmission mechanisms is greater than or equal to 0 degrees and less than 180 degrees.

[0044] The root cutting device of the present invention includes a root cutting blade 7-1, a root cutting motor 7-2, and a root cutting shaft 7-3 installed between the root cutting blade 7-1 and the main shaft of the motor 7-2.

[0045] The automatic adjustment device 6 described in this invention is a device capable of adjusting the distance between the garlic clove and the root-cutting blade 7-1.

[0046] In a preferred embodiment of the present invention, the automatic adjustment device 6 includes a probe 6-1 for detecting the diameter of a garlic bulb, an adjusting rod 6-2 connected to the probe 6-1, and a fork 6-3 hinged to one end of the adjusting rod 6-2. The other end of the fork 6-3 engages with a first and a second positioning mounting seat, causing the first and second positioning mounting seats to move along their respective guide rails. The fork 6-3 is hinged to a fork mounting seat 6-4 on the frame via a pin. When the garlic bulb has a large diameter, it pushes the probe 6-1 outward a greater distance, causing the adjusting rod 6-2 to move outward a certain distance. This, in turn, causes the fork 6-3 to push the first and second positioning mounting seats to move. The increased distance between the left and right positioning transmission mechanisms on both sides of the lower end of the garlic bulb causes the garlic bulb to move downward a certain distance relative to its original position, thereby eliminating the positioning inaccuracy problem caused by the diameter of the garlic bulb.

[0047] As a preferred embodiment of the present invention, in order to better detect the diameter of garlic, the detection rod 6-1 is provided with a detection roller 6-5.

[0048] As a preferred embodiment of the present invention, the linear velocities at the edges of the first floating positioning transmission mechanism 2-4, the second floating positioning transmission mechanism 3-4, the left positioning transmission mechanism 4-4, and the right positioning transmission mechanism 5-4 are the same, that is, equal in magnitude and all pointing in the direction of the cutting blade.

[0049] As a preferred embodiment of the present invention, the first or second floating positioning transmission mechanism is a roller, and a roller made of a soft material is preferred to protect the garlic head.

[0050] like Figure 6 or Figure 7 As another preferred embodiment of the present invention, the floating positioning transmission mechanism is a transmission belt or a transmission chain.

[0051] In a preferred embodiment of the present invention, the positioning and transmission mechanism is a roller, and the outer contour line of the contact point between the roller and the garlic is a straight line segment.

[0052] like Figure 6 or Figure 7 As another preferred embodiment of the present invention, the left and right positioning and transmission mechanism is a transmission belt or transmission chain, and the outline of the transmission belt or transmission chain at the contact point with the garlic is a straight line segment.

[0053] In addition to the aforementioned mechanisms or devices, the present invention also includes a positioning transmission shaft 8-1 for transmitting fixed force to the first positioning transmission device 2 and the second positioning transmission device 3 respectively, a floating transmission shaft 8-2 for transmitting power to the first floating transmission device and the second floating transmission device respectively, and a universal joint 8-3 installed between the positioning transmission shaft and the floating rotating shaft.

[0054] In a preferred embodiment of the present invention, the positioning transmission shaft 8-1 and the floating rotation shaft 8-2 are splined shafts.

[0055] The second solution to achieve the intent of this invention is to convert the change in the diameter of the garlic into the up-and-down movement of the root-cutting blade. Except for a slight difference in the automatic adjustment device, the other parts are the same as the first solution, and will not be described again here. Only the difference in the automatic adjustment device will be described.

[0056] like Figure 10 As shown, the automatic adjustment device includes a probe 6-1 for detecting the diameter of garlic, a probe roller 6-5 on the probe, an adjusting rod 6-2 connected to the probe 6-1, a wire rope 6-6 connected to the adjusting rod 6-2, an adjusting gear 6-8 connected to the other end of the wire rope 6-6 for adjusting the movement distance of the root-cutting blade 7-1, an adjusting rack 6-9 meshing with the adjusting gear 6-8, the adjusting rack 6-9 being fixedly connected to the root-cutting device 6, and a root-cutting device adjusting guide rail 6-10 for moving the root-cutting device 6 along the main shaft direction. The adjusting gear is mounted on a fixed base 6-11. When one end of the wire rope 6-6 is installed far from the center of the adjusting gear 6-8, pulling the wire rope 6-6 a certain distance will cause a small displacement of the root-cutting blade 7-1; when one end of the wire rope 6-6 is installed close to the center of the adjusting gear 6-8, pulling the wire rope 6-6 a certain distance will cause a large displacement of the root-cutting blade 7-1. When the diameter of the garlic increases, the probe moves outward, driving the adjusting rod to move outward, which in turn lifts the steel wire rope. When the position of the garlic relative to the left and right positioning and transmission mechanism remains unchanged, the steel wire rope drives the adjusting gear to rotate, which in turn moves the root-cutting blade upward a certain distance, thus achieving precise removal of the garlic roots.

[0057] The above examples are only used to illustrate the claims of this invention, and are not intended to limit the scope of protection of this invention. Any changes or combinations of the components in the above examples by those skilled in the art are within the scope of protection of this invention; any improvements and substitutions made by those skilled in the art within the scope of this invention are also within the scope of protection of this invention.

Claims

1. A garlic root-cutting device, comprising a frame, a positioning and transmission device, an automatic adjustment device, a root-cutting device, and a transmission device, characterized in that: The frame is X-shaped; The positioning and transmission device includes a first floating transmission device and a second floating transmission device, which are arranged in an X-shape and can float independently, installed on the upper end of the X-shaped frame, and a first positioning transmission device and a second positioning transmission device installed on the lower end of the frame. During the garlic transmission process, the positioning transmission device can clamp the garlic head in four directions and cut and position it based on the root of the garlic head. An automatic adjustment device installed near the positioning transmission device can detect the diameter of the garlic and automatically adjust the relative distance between the garlic root cutting blade and the garlic root according to the size of the garlic diameter. Guide rails are provided on the four branches of the X-shaped frame. The first floating transmission device is provided with a first floating positioning transmission mechanism, and the second floating transmission device is provided with a second floating positioning transmission mechanism. The first floating positioning transmission mechanism or the second floating positioning transmission mechanism is a rotary mechanism, which is a roller, a conveyor belt, or a conveyor chain. The included angle between the rotary plane of the first floating positioning transmission mechanism and the rotary plane of the second floating positioning transmission mechanism is greater than or equal to 0 degrees and less than 180 degrees. The first positioning transmission device is provided with a left positioning transmission mechanism, and the second positioning transmission device is provided with a right positioning transmission mechanism. The left positioning transmission mechanism or the right positioning transmission mechanism is a rotary mechanism, which is a roller, a conveyor belt, or a conveyor chain. The included angle between the positioning limiting plane determined by the left positioning transmission mechanism and the positioning limiting plane determined by the right positioning transmission mechanism is greater than or equal to 0 degrees and less than 180 degrees. The left and right positioning transmission mechanisms are symmetrical about the plane determined by the center line of the garlic stalk and the direction of movement. The angle between the rotation plane of the left and right positioning transmission mechanisms is greater than 0 degrees and less than 180 degrees. The automatic adjustment device includes a probe rod for detecting the diameter of garlic, a probe roller on the probe rod, an adjusting rod connected to the probe rod, a steel wire rope connected to the adjusting rod, an adjusting gear connected to the other end of the steel wire rope for adjusting the movement distance of the root-cutting blade, an adjusting rack meshing with the adjusting gear, the adjusting rack being fixedly connected to the root-cutting device, and a root-cutting device adjusting guide rail for moving the root-cutting device along the main shaft direction. The adjusting gear is mounted on a fixed base. When one end of the steel wire rope is mounted far from the center of the adjusting gear, pulling the steel wire rope a certain distance will cause a small displacement of the root-cutting blade; when one end of the steel wire rope is mounted close to the center of the adjusting gear, pulling the steel wire rope a certain distance will cause a larger displacement of the root-cutting blade. When the diameter of the garlic increases, the probe rod moves outward, driving the adjusting rod to move outward, thereby lifting the steel wire rope. When the position of the garlic relative to the left and right positioning transmission mechanisms remains unchanged, the steel wire rope drives the adjusting gear to rotate, causing the root-cutting blade to move upward a certain distance, achieving precise cutting of the garlic roots.

2. The garlic root-cutting device according to claim 1, characterized in that: The positioning and transmission device has a gap between the first floating transmission device and the second floating transmission device for the garlic stalk to pass through. The first positioning and transmission device and the second positioning and transmission device are symmetrical structures. There is also a gap between the first positioning and transmission device and the second positioning and transmission device for the garlic roots to pass through.

3. The garlic root-cutting device according to claim 2, characterized in that: The first floating transmission device includes a first floating mounting base mounted on a first guide rail of the frame, a first driving bevel gear and a first driven bevel gear meshing with it mounted in the first floating mounting base, a first floating positioning transmission mechanism mounted on the first driven bevel gear, and an elastic device that causes the first floating mounting base to carry the first floating positioning transmission mechanism to move toward the root cutting device. The second floating transmission device includes a second floating mounting base that moves along a second guide rail, a second driving bevel gear and a second driven bevel gear that mesh with the second floating mounting base, a second floating positioning transmission mechanism that is mounted on the second driven bevel gear, and a second elastic device that causes the second floating mounting base to carry the second floating positioning transmission mechanism toward the root cutting device. The first positioning and transmission device includes a first positioning mounting base, a third driving bevel gear and a third driven bevel gear meshing with it, a left positioning and transmission mechanism mounted on the third driven bevel gear, and a third elastic device mounted outside the first positioning mounting base to move the first positioning mounting base carrying the left positioning and transmission mechanism toward the first floating transmission device and the second floating transmission device. The second positioning and transmission device includes a second positioning mounting base, a fourth driving bevel gear and a fourth driven bevel gear meshing with it, a right positioning and transmission mechanism mounted on the fourth driven bevel gear, and a fourth elastic device mounted outside the second positioning mounting base to move the second positioning mounting base carrying the right positioning and transmission mechanism toward the first floating transmission device and the second floating transmission device.

4. The garlic root-cutting device according to claim 1, characterized in that: The transmission device includes a positioning drive shaft, a floating drive shaft that provides power to a first or second drive bevel gear, and a universal joint connecting the positioning drive shaft and the floating drive shaft.

5. A garlic root-cutting device according to claim 1, characterized in that: The first or second floating positioning transmission mechanism is made of a soft material to avoid damaging the garlic.

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