An automatic stem cutting device for the No. 4 heat-treated king grass seed stem

Abstract

This invention relates to an automatic stem-cutting device for *King Grass No. 4*, comprising a storage device for storing *King Grass No. 4*, a stem-cutting device for automatically cutting the stems of *King Grass No. 4*, a feeding device for conveying *King Grass No. 4* from the storage device to the stem-cutting device, a stem-collecting device, and a leaf-collecting device. The stem-cutting device includes a support frame and a cutting mechanism and a conveying mechanism mounted on the support frame. The conveying mechanism conveys *King Grass No. 4* to the cutting mechanism and simultaneously conveys the cut stems to the stem-collecting device or the cut leaves to the leaf-collecting device. The cutting mechanism cuts the stems of *King Grass No. 4* between nodes. This automatic stem-cutting device for *King Grass No. 4* can achieve automatic stem-cutting, resulting in higher efficiency and reduced planting costs.

Description

Technical Field

[0001] This invention relates to a processing equipment for *King Grass*, specifically to an automatic cutting device for the stems of *King Grass No. 4*. Background Technology

[0002] Reyan No. 4 Wangcao is a high-quality perennial grass bred by the Tropical Crop Germplasm Resources Research Institute of the Chinese Academy of Tropical Agricultural Sciences. It is characterized by high yield and good palatability, and is an important source of roughage for ruminant livestock in tropical regions. When planting Reyan No. 4 Wangcao, stem cutting is usually used. This involves cutting the stems of Reyan No. 4 Wangcao into small sections, retaining the nodes of each section, and then inserting them into the soil to allow them to germinate and grow. However, the cutting of the stems of Reyan No. 4 Wangcao is currently mostly done manually, which is inefficient and results in high planting costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic stem cutting device for Reyan No. 4 King Grass. The automatic stem cutting device for Reyan No. 4 King Grass can automatically cut the branches and stems of Reyan No. 4 King Grass, which is more efficient and can reduce planting costs.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is:

[0005] An automatic stem cutting device for *Germania lingulata* var. *remyla* includes a storage device for storing *Germania lingulata* var. *remyla*, a stem cutting device for automatically cutting the stems of *Germania lingulata* var. *remyla*, a feeding device for feeding the *Germania lingulata* var. *remyla* var. *remyla* var. *remyla* into the stem cutting device, a cutting mechanism and a conveying mechanism mounted on the support, wherein the conveying mechanism is used to convey the *Germania lingulata* var. *remyla* var. *remyla* var. *remyla* into the stem cutting mechanism, and simultaneously convey the cut stems into the stem cutting device, or convey the cut stems into the stem cutting device; the cutting mechanism is used to cut the stems of *Germania lingulata* var. *remyla* var. *remyla* between nodes.

[0006] Preferably, there are two sets of conveying mechanisms, which are symmetrically arranged; there are also two sets of cutting mechanisms, which are also symmetrically arranged; wherein the two sets of conveying mechanisms and the two sets of cutting mechanisms are located on the same straight line; and the two sets of cutting mechanisms are located outside the two sets of conveying mechanisms.

[0007] Preferably, the branch cutting device further includes a node detection mechanism disposed on the support for detecting nodes in the Reyan No. 4 King Grass; the node detection mechanism includes detection modules disposed on the upper and lower sides of the conveying channel; each detection module includes a detection frame and a detection wheel disposed on the detection frame, wherein the detection wheel is mounted on the detection frame by a wheel frame; the wheel frame of one group of detection modules is connected to the detection frame by a first elastic telescopic mechanism, the first elastic telescopic mechanism being used to cause the detection wheel of the group of detection modules to elastically press against the upper or lower side of the branch.

[0008] Preferably, the inlet of the branch detection mechanism is provided with a guide mechanism, which is used to guide the branch into the detection wheel of the detection module located on the upper and lower sides of the conveying channel.

[0009] Preferably, the cutting mechanism includes a cutting wheel and a cutting drive mechanism for driving the cutting wheel to rotate. The cutting wheel is provided with a blade and is located on the upper and lower sides of the conveying channel. The cutting wheel on the upper side is the upper cutting wheel, which is rotatably connected to the support via an upper rotating shaft. The cutting wheel on the lower side is the lower cutting wheel, which is rotatably connected to the support via a lower rotating shaft. When the blades of the upper cutting wheel and the lower cutting wheel intersect, the branch is cut off.

[0010] Preferably, the conveying mechanism includes a conveying wheel and a conveying drive mechanism for driving the conveying wheel to rotate, wherein the conveying wheel is disposed on the upper and lower sides of the conveying channel; wherein the conveying wheel located on the upper side is the upper conveying wheel, and the conveying wheel located on the lower side is the lower conveying wheel; the upper conveying wheel is mounted on the support via an upper conveying shaft, and the upper conveying shaft is connected to the support via a second elastic telescopic mechanism, the second elastic telescopic mechanism causing the upper conveying wheel to elastically press downward against the branch; the lower conveying wheel is mounted on the support via a lower conveying shaft.

[0011] Preferably, the conveying drive mechanism includes a synchronous belt drive mechanism and a power mechanism for driving the synchronous belt drive mechanism, wherein the power mechanism includes a drive motor, and the main shaft of the drive motor is connected to the lower conveying shaft through the synchronous belt drive mechanism.

[0012] Preferably, the cutting drive mechanism includes a gear transmission mechanism; two meshing gears in the gear transmission mechanism are respectively mounted on the upper rotating shaft and the lower rotating shaft; a power switching mechanism is provided between the lower rotating shaft and the lower conveying shaft, the power switching mechanism being used to select whether to transmit the power of the drive motor to the gear transmission mechanism, the power switching mechanism including a support frame, a belt transmission mechanism mounted on the support frame, and a rotation drive mechanism for driving the support frame to rotate around the lower conveying shaft as the rotation center, wherein one end of the support frame is rotatably connected to the lower conveying shaft, and the other end is a free end; a central shaft is provided on the free end of the support frame, and the lower conveying shaft is connected to the central shaft via the belt transmission mechanism; a drive gear is provided on the central shaft; when the rotation drive mechanism drives the free end of the support frame to rotate upward, the drive gear meshes with the gear mounted on the lower rotating shaft; when the rotation drive mechanism drives the free end of the support frame to rotate downward, the drive gear disengages from the gear mounted on the lower rotating shaft.

[0013] Preferably, the leaf and branch collection device includes a frame and a leaf and branch collection box disposed below the frame. The frame has a collection trough above the leaf and branch collection box. A baffle is provided at the collection trough; there are two sets of baffles, one end of each set rotatably connected to the frame, and the other end being a free end. A tension spring is provided between the free end of the baffle and the frame. The upper end of the tension spring is connected to the frame, and the lower end is connected to the free end of the baffle. The elastic force of the tension spring causes the free ends of the two sets of baffles to rotate upwards and press against each other, thereby blocking the collection trough.

[0014] Preferably, the branch and leaf collecting device further includes a reverse drive mechanism for driving one set of baffles to move in the opposite direction; wherein, the bottom of the baffle is provided with an arc-shaped portion, and the arc-shaped portion is provided with multiple sets of protruding teeth arranged along its arc direction, and the protruding teeth of the two sets of baffles are connected by a gear mechanism; the reverse drive mechanism includes a drive block, which is installed on the lower rotating shaft of the cutting mechanism near the feed inlet of the branch cutting device, and the baffle is provided with a drive part; when the lower rotating shaft rotates in the opposite direction, the drive block causes the drive part on one set of baffles to rotate downward, thereby driving the other set of baffles to rotate in the opposite direction, causing the free ends of the two sets of baffles to gradually separate from the abutting state, so as to open the collecting groove.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The automatic stem cutting device for Reyan No. 4 King Grass of the present invention can automatically cut Reyan No. 4 King Grass and send the cut stems to the stem collection device, while the cut branches and leaves are sent to the branch and leaf collection device. The degree of automation is higher, which can improve processing efficiency, reduce labor costs, and thus reduce the planting cost of Reyan No. 4 King Grass. Attached Figure Description

[0017] Figure 1 and Figure 2 These are two different perspective three-dimensional structural schematic diagrams of the automatic cutting device for the stems of the No. 4 king grass of the present invention.

[0018] Figures 3-8 This is a schematic diagram of the branch cutting device from six different perspectives.

[0019] Figure 9 This is a schematic diagram of the cutting drive mechanism and the conveying drive mechanism.

[0020] Figure 10 This is a schematic diagram of the branch cutting device and the branch and leaf collection device.

[0021] Figure 11 This is a schematic diagram of the branch and leaf collection device.

[0022] Figure 12 This is a schematic diagram of the reverse drive mechanism.

[0023] Figure 13 This is a schematic diagram of the arc-shaped part and the gear mechanism. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0025] See Figures 1-13The automatic stem cutting device for *Hot Research No. 4* King Grass of the present invention includes a storage device 1 for storing *Hot Research No. 4* King Grass, a stem cutting device 2 for automatically cutting the stems of *Hot Research No. 4* King Grass, a feeding device for feeding the *Hot Research No. 4* King Grass from the storage device 1 to the stem cutting device 2, a stem collecting device 4 for collecting the cut stems, and a leaf collecting device 3 for collecting the leaves and branches at the tail end of *Hot Research No. 4* King Grass. The stem cutting device 2 includes a... The workbench 10 includes a cutting mechanism and a conveying mechanism mounted on it. The workbench 10 includes a platform and a support 15 mounted on the platform. The cutting mechanism and the conveying mechanism are mounted on the support 15. The conveying mechanism is used to transport the Reyan No. 4 King Grass to the cutting mechanism, and at the same time, transport the cut seed stems to the seed stem collection device 4 or send the branches and leaves to the branch and leaf collection device 3. The cutting mechanism is used to cut the branches of Reyan No. 4 King Grass between the nodes.

[0026] In this embodiment, the feeding device can be automatically fed by a robotic arm or manually fed by a person.

[0027] See Figures 1-13 The conveying mechanism consists of two sets, symmetrically arranged; the cutting mechanism also consists of two sets, symmetrically arranged; wherein the two sets of conveying mechanisms and the two sets of cutting mechanisms are located on the same straight line; and the two sets of cutting mechanisms are located outside the two sets of conveying mechanisms; along the direction away from the feed inlet of the branch cutting device 2, the two sets of conveying mechanisms and the cutting mechanism are sequentially divided into a first cutting mechanism, a first conveying mechanism, a second conveying mechanism, and a second cutting mechanism. The first cutting mechanism can be used to cut the branches and leaves of Reyan No. 4 King Grass, or to cut the branches of Reyan No. 4 King Grass. Whether it is to cut the branches or leaves can be flexibly adjusted according to the actual situation.

[0028] See Figures 1-13The branch cutting device 2 further includes a node detection mechanism 8 mounted on the support 15 for detecting nodes in the *Hot-Research No. 4* *King Grass*. The node detection mechanism 8 includes two sets of detection modules mounted on the upper and lower sides of the conveying channel. Each set of detection modules includes a detection frame 801 and a detection wheel 804 mounted on the detection frame 801. The detection wheel 804 is mounted on the detection frame 801 via a wheel frame. The wheel frame of one set of detection modules is connected to the detection frame 801 via a first elastic telescopic mechanism 803, which enables the detection wheel 804 of that set of detection modules to move vertically. When the conveying mechanism conveys branches, the wheel surfaces of the detection wheels 804 located on the upper and lower sides press against the upper and lower sides of the branches, thus assisting in the conveying process. When a node in the branch enters between the detection wheels 804 on the upper and lower sides, because the diameter of the node in the branch is larger than the diameter of other parts, it can cause one set of detection wheels 804 (the one located on the upper side in this embodiment) to move vertically. When the vertical travel of the detection wheel 804 (which can move vertically) is greater than a preset value, the control system determines that the node on the branch has passed the detection wheel 804. At this time, the control system can control the cutting mechanism to work by calculating the distance between two adjacent nodes on the branch and combining the conveying speed of the conveying mechanism, so that the cutting mechanism can cut the branch between the nodes; or by adjusting the distance between the cutting mechanism and the node detection mechanism 8, the distance can be made smaller than the distance between two adjacent nodes on the branch. In this way, when the node detection mechanism 8 detects a node, the cutting mechanism works, so that the branch is successfully cut between two adjacent nodes. When the node on the branch leaves the detection wheel 804 on the upper and lower sides, the detection wheel 804 on the upper side can move downward under the elastic force of the first elastic telescopic mechanism 803, so that the detection wheel 804 is always pressed against the upper side of the branch.

[0029] See Figures 1-13 The inlet of the node detection mechanism 8 is equipped with a guide mechanism 7. The guide mechanism 7 guides the branch between the detection wheels 804 located on the upper and lower sides of the conveying channel. It includes guide blocks on the upper and lower sides of the conveying channel, forming a funnel-shaped guide channel. This guide channel guides the branch smoothly into the node detection mechanism 8, ensuring that the upper and lower sides of the branch contact the wheel surfaces of the detection wheels 804 on the upper and lower sides of the conveying channel. Simultaneously, the guide channel also has a limiting function, preventing vertical movement of the branch during transport, thus ensuring straight-line transport.

[0030] See Figures 1-13 The conveying mechanism includes a conveying wheel 6 and a conveying drive mechanism for driving the conveying wheel 6 to rotate. The conveying wheel 6 is disposed on the upper and lower sides of the conveying channel. The conveying wheel 6 located on the upper side is the upper conveying wheel, and the conveying wheel 6 located on the lower side is the lower conveying wheel. The upper conveying wheel is rotatably connected to the support 15 via an upper conveying shaft, and the upper conveying shaft is connected to the support 15 via a second elastic telescopic mechanism. The second elastic telescopic mechanism is used to cause the upper conveying wheel to move downward. The lower conveying wheel is rotatably connected to the support 15 via a lower conveying shaft. The conveying drive mechanism includes a synchronous belt drive mechanism 14 and a power mechanism for driving the synchronous belt drive mechanism 14. The power mechanism includes a drive motor 13, and the main shaft of the drive motor 13 is connected to the lower conveying shaft via the synchronous belt drive mechanism 14. The above structure allows the upper and lower conveying wheels to flexibly clamp and convey branches. The lifting and lowering movement of the upper conveying wheel can accommodate branches of different diameters. At the same time, when the nodes of the branches enter between the upper and lower conveying wheels, the upper conveying wheel can adaptively move vertically, thereby realizing the conveying of different parts of the branches.

[0031] See Figures 1-13The cutting mechanism includes a cutting wheel 5 and a cutting drive mechanism for driving the cutting wheel 5 to rotate. The cutting wheel 5 is equipped with a blade and is located on the upper and lower sides of the conveying channel. The upper cutting wheel 5 is rotatably connected to the support 15 via an upper rotating shaft; the lower cutting wheel 5 is rotatably connected to the support 15 via a lower rotating shaft. When the blades of the upper and lower cutting wheels intersect... The branches can then be cut between nodes. The cutting drive mechanism includes a gear transmission mechanism 11, with two meshing gears mounted on the upper and lower rotating shafts respectively. A power switching mechanism 12 is provided between the lower rotating shaft and the lower conveying shaft. This mechanism selects whether to transmit power from the drive motor 13 to the gear transmission mechanism 11. The power switching mechanism 12 includes a support frame 1202, a belt drive mechanism mounted on the support frame 1202, and a rotation drive mechanism 1201 for driving the support frame 1202 to rotate around the lower conveying shaft. One end of the support frame 1202 is rotatably connected to the lower conveying shaft, and the other end is a free end. A central shaft is provided on the free end of the support frame 1202, and the lower conveying shaft is connected to the central shaft via the belt drive mechanism 1204. A drive gear 1203 is provided on the central shaft. When the rotation drive mechanism 1201... When the free end of the support frame 1202 is rotated upward, the drive gear 1203 meshes with the gear mounted on the lower rotating shaft, thereby driving the gear transmission mechanism 11 to work, which in turn drives the upper and lower cutting wheels to rotate in opposite directions, thereby cutting the branches; when the rotation drive mechanism 1201 drives the free end of the support frame 1202 to rotate downward, the drive gear 1203 disengages from the gear mounted on the lower rotating shaft, so that the upper and lower cutting wheels are in the off state.

[0032] In this embodiment, the diameters of the driving gear 1203 and the two meshing gears in the gear transmission mechanism 11 are equal; at the same time, the diameters of the pulleys in the synchronous belt transmission mechanism 14 and the belt transmission mechanism 1204 are also equal; the radius of the cutting wheel 5 (i.e., the maximum distance between the blade and the axis of rotation) is equal to the radius of the conveying wheel 6. Therefore, the rotational speed of the cutting wheel 5 and the rotational speed of the conveying wheel 6 are equal, so the branches will not slip forward along the conveying direction of the conveying channel during the conveying process; at the same time, the cutting wheel 5 can also play an auxiliary role in conveying while cutting the branches.

[0033] See Figures 1-13The rotation drive mechanism 1201 includes an electromagnet mounted on the bracket 15. The telescopic rod of the electromagnet is connected to the support frame 1202 via a connecting block. The support frame 1202 is provided with a sliding groove that extends along the length of the support frame 1202. The connecting block is installed in the sliding groove and can move along the length of the sliding groove. Thus, the electromagnet drives the connecting block to rise and fall, thereby causing the support frame 1202 to rotate around the lower conveying shaft as the rotation center. This causes the drive gear 1203 mounted on the intermediate rotating shaft to mesh and disengage with the gear mounted on the lower rotating shaft, thereby selecting whether to transmit power to the gear transmission mechanism 11, and thus determining whether the cutting mechanism works.

[0034] See Figures 1-13 The branch and leaf collection device 3 includes a frame and a branch and leaf collection box disposed below the frame. A collection trough is provided above the branch and leaf collection box on the frame. A baffle 16 is provided at the collection trough. There are two sets of baffles 16, each set having one end rotatably connected to the frame and the other end being a free end. A tension spring 17 is provided between the free end of the baffle 16 and the frame. The upper end of the tension spring 17 is connected to the frame, and the lower end is connected to the free end of the baffle 16. The elastic force of spring 17 causes the free ends of the two sets of baffles 16 to rotate upward and abut against each other, thereby blocking the collection groove. After the branches and leaves on the trunk are cut, they need to be sent into the branch and leaf collection device 3. For this purpose, the branch and leaf collection device 3 also includes a reverse drive mechanism for driving one set of baffles 16 to move in the opposite direction. The bottom of the baffle 16 is provided with an arc-shaped part 18, and the arc-shaped part 18 is provided with multiple sets of protruding teeth arranged along its arc direction. The protruding teeth of the two sets of baffles 16 are connected by a gear mechanism 19. The reverse drive mechanism includes a drive block 9, which is mounted on the lower rotating shaft of the cutting mechanism (i.e., the first cutting mechanism) near the feed inlet of the branch cutting device 2. A drive part 20 is provided on the baffle 16. When the lower rotating shaft rotates in the reverse direction, the drive block 9 causes the drive part 20 on the baffle 16 to move downwards. When one set of baffles 16 rotates downwards, the arc-shaped portion 18 on that baffle 16 also rotates, thus driving the other set of baffles 16 to move in the reverse direction via the gear mechanism 19. The movement involves the free ends of the two sets of baffles 16 gradually separating from the abutting state to open the collection groove, allowing the branches and leaves to fall into the branch and leaf collection box. Then, the drive block 9 rotates or rotates in the opposite direction, causing the drive block 9 to separate from the drive part 20. The baffle 16 rotates upward under the elastic force of the tension spring 17. Through the arc-shaped part 18 and the gear mechanism 19, the other set of baffles 16 also rotates upward. When the free ends of the two sets of baffles 16 abut together, they block the collection groove above the branch and leaf collection box.

[0035] In this embodiment, the structure of the first elastic telescopic mechanism 803 and the second elastic telescopic mechanism can be implemented using existing devices, such as a vertical guide groove provided on the bracket 15 and a guide seat provided in the vertical guide groove. The guide seat is installed in the vertical guide groove, and a spring is provided between the upper or lower end of the guide seat (specifically depending on the installation position of the first elastic telescopic mechanism 803 and the second elastic telescopic mechanism) and the bracket 15. The elastic force of the spring causes the guide seat to move upward or downward, and the wheel frame and the upper conveying shaft are installed on the guide seat.

[0036] See Figures 1-13 The seed stem collection device 4 includes a seed stem collection box located at the discharge port of the branch cutting device 2.

[0037] See Figures 1-13 The working principle of the automatic stem cutting device for the No. 4 reticulata seed of the present invention is as follows:

[0038] During operation, the feeding device feeds the stems (i.e., the end furthest from the leaves) of the Reyan No. 4 King Grass into the feed inlet of the stem cutting device 2. Then, the conveying mechanism starts and transports the stems to the node detection mechanism 8. The node detection mechanism 8 detects the position of the nodes on the stems, and then the control system controls the cutting mechanism to cut the stems between two adjacent nodes. Subsequently, the conveying mechanism continues to transport the cut stems to the bell stem collection device 4 located at the discharge outlet. When the cutting mechanism cuts the leaves in the stems, the conveying mechanism sends the leaves into the leaf collection device 3.

[0039] The above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. An automatic cutting device for the stems of *Heterogeneous Flos No. 4*, characterized in that, The system includes a storage device for storing *Hot-Research No. 4* King Grass, a branch cutting device for automatically cutting the branches of *Hot-Research No. 4* King Grass, a feeding device for feeding the *Hot-Research No. 4* King Grass from the storage device to the branch cutting device, a seed stem collecting device for collecting the cut seed stems, and a leaf collecting device for collecting the leaves and branches at the tail end of *Hot-Research No. 4* King Grass. The branch cutting device includes a support frame and a cutting mechanism and a conveying mechanism mounted on the support frame. The conveying mechanism is used to transport the Reyan No. 4 King Grass to the cutting mechanism, and at the same time, transport the cut seed stems to the seed stem collection device and send the cut branches and leaves to the branch and leaf collection device. The cutting mechanism is used to cut the branches of Reyan No. 4 King Grass between the nodes. The branch cutting device further includes a node detection mechanism mounted on the support for detecting nodes in *Heat-Research No. 4* *King Grass*. The node detection mechanism includes detection modules mounted on the upper and lower sides of the conveying channel. Each detection module includes a detection frame and detection wheels mounted on the frame, wherein the detection wheels are mounted on the frame via wheel frames. The wheel frames of one detection module are connected to the frame via a first elastic telescopic mechanism, which causes the detection wheels of that module to elastically press against the upper or lower side of the branch. A guide mechanism is provided at the inlet of the node detection mechanism to guide the branch between the detection wheels of the detection modules located on the upper and lower sides of the conveying channel. When the node detection mechanism detects a node, the cutting mechanism operates to cut the branch between two adjacent nodes. The leaf and branch collection device includes a frame and a leaf and branch collection box disposed below the frame. A collection trough is provided above the collection box on the frame. Two sets of baffles are provided at the collection trough. One end of each set of baffles is rotatably connected to the frame, while the other end is free. A tension spring is provided between the free end of the baffle and the frame. The upper end of the tension spring is connected to the frame, and the lower end is connected to the free end of the baffle. The elastic force of the tension spring causes the free ends of the two sets of baffles to rotate upwards and press against each other, thereby blocking the collection trough. The branch and leaf collection device also includes a reverse drive mechanism for driving one set of baffles to move in the opposite direction; wherein, the bottom of the baffle is provided with an arc-shaped part, and the arc-shaped part is provided with multiple sets of protruding teeth arranged along its arc direction, and the protruding teeth of the two sets of baffles are connected by a gear mechanism; the reverse drive mechanism includes a drive block, which is installed on the lower rotating shaft of the cutting mechanism near the feed inlet of the branch cutting device, and the baffle is provided with a drive part; when the lower rotating shaft rotates in the opposite direction, the drive block causes the drive part on one set of baffles to rotate downward, thereby driving the other set of baffles to rotate in the opposite direction, causing the free ends of the two sets of baffles to gradually separate from the tight state, so as to open the collection groove.

2. The automatic stem cutting device for *Gynostemma pentaphyllum* seedlings according to claim 1, characterized in that, The conveying mechanism consists of two sets, which are symmetrically arranged; the cutting mechanism also consists of two sets, which are also symmetrically arranged; wherein, the two sets of conveying mechanisms and the two sets of cutting mechanisms are located on the same straight line; and the two sets of cutting mechanisms are located outside the two sets of conveying mechanisms.

3. The automatic stem cutting device for *Germania lingua* seedlings of *Hot-Researched No. 4* as described in claim 1, characterized in that, The cutting mechanism includes a cutting wheel and a cutting drive mechanism for driving the cutting wheel to rotate. The cutting wheel is provided with a blade and is located on the upper and lower sides of the conveying channel. The upper cutting wheel is rotatably connected to the support via an upper rotating shaft. The lower cutting wheel is rotatably connected to the support via a lower rotating shaft. When the blades of the upper and lower cutting wheels intersect, the branch is cut off.

4. The automatic stem cutting device for *Heterogeneous privet* seedlings according to claim 3, characterized in that, The conveying mechanism includes a conveying wheel and a conveying drive mechanism for driving the conveying wheel to rotate. The conveying wheel is disposed on the upper and lower sides of the conveying channel. The conveying wheel located on the upper side is the upper conveying wheel, and the conveying wheel located on the lower side is the lower conveying wheel. The upper conveying wheel is mounted on the support via an upper conveying shaft, and the upper conveying shaft is connected to the support via a second elastic telescopic mechanism. The second elastic telescopic mechanism causes the upper conveying wheel to elastically press downward against the branch. The lower conveying wheel is mounted on the support via a lower conveying shaft.

5. The automatic stem cutting device for *Heterogeneous privet* seedlings according to claim 4, characterized in that, The conveying drive mechanism includes a synchronous belt drive mechanism and a power mechanism for driving the synchronous belt drive mechanism. The power mechanism includes a drive motor, and the main shaft of the drive motor is connected to the lower conveying shaft through the synchronous belt drive mechanism.

6. The automatic stem cutting device for *Heterogeneous privet* seedlings according to claim 5, characterized in that, The cutting drive mechanism includes a gear transmission mechanism; two meshing gears in the gear transmission mechanism are respectively mounted on the upper rotating shaft and the lower rotating shaft; a power switching mechanism is provided between the lower rotating shaft and the lower conveying shaft, the power switching mechanism being used to select whether to transmit the power of the drive motor to the gear transmission mechanism, the power switching mechanism including a support frame, a belt transmission mechanism mounted on the support frame, and a rotation drive mechanism for driving the support frame to rotate around the lower conveying shaft as the rotation center, wherein one end of the support frame is rotatably connected to the lower conveying shaft, and the other end is a free end; a central rotating shaft is provided on the free end of the support frame, and the lower conveying shaft is connected to the central rotating shaft through the belt transmission mechanism; a drive gear is provided on the central rotating shaft; when the rotation drive mechanism drives the free end of the support frame to rotate upward, the drive gear meshes with the gear mounted on the lower rotating shaft; when the rotation drive mechanism drives the free end of the support frame to rotate downward, the drive gear disengages from the gear mounted on the lower rotating shaft.

Images