Fruit tree profiling pruning machine

Abstract

The utility model belongs to the technical field of fruit tree pruning equipment, and discloses a fruit tree profiling pruning machine which comprises a base, a multi-rod profiling device, disk saw pruning devices and a hydraulic system, the multi-rod profiling device is connected with the base through a dovetail guide rail sliding block, the disk saw pruning devices are arranged up and down, and the hydraulic system is connected with the multi-rod profiling device. The upper disk saw trimming device is connected with the multi-rod profiling device through a linear guide rail sliding block, the lower disk saw trimming device is connected with the multi-rod profiling device through a disk saw trimming device fixing frame, and the hydraulic system provides power for the device; the disk saw pruning device comprises a disk saw pruning device cover plate, a disk saw pruning device rack, a disk saw dislocation pruning mechanism, a dislocation branch gathering mechanism and a baffle. The trunk-shaped fruit tree profiling pruning device can be suitable for profiling pruning operation of trunk-shaped fruit trees, branches are folded in the operation process, damage to the branches is reduced, pruning quality is improved, and profiling pruning can be conducted according to the outline of a tree body.

Description

TECHNICAL FIELD

[0001] The utility model relates to fruit tree pruning equipment technical field especially relates to a fruit tree profiling pruning machine. BACKGROUND

[0002] Fruit tree pruning is a key link of orchard management, directly affects fruit yield and quality. The traditional manual pruning mode is low in efficiency and high in labor intensity, and the existing mechanized pruning equipment generally has the problem of insufficient profiling precision, which is difficult to adapt to various tree shape structures (such as cylindrical, spindle, etc.) of fruit trees. The pruning machines on the market at present mostly adopt fixed or simple adjustable structures, which have limited adjustment range and cannot accurately fit the three-dimensional contour of fruit trees, resulting in unsatisfactory pruning effect. Especially when facing fruit trees of different varieties and different growth stages, the existing equipment often appears the phenomenon of missed pruning or excessive pruning, which seriously affects the pruning quality. In addition, the hydraulic adjustment system of the traditional pruning machine has poor coordination of each actuator, and it is difficult to realize multi-angle synchronous precise adjustment, which restricts the improvement of pruning efficiency. SUMMARY

[0003] The utility model aims at providing a fruit tree profiling pruning machine to solve the problems of insufficient profiling ability and poor adaptability of the existing pruning machine, and improve the pruning precision and operation efficiency. In order to achieve this purpose, the utility model adopts the following technical scheme:

[0004] A fruit tree profiling pruning machine comprises:

[0005] A base;

[0006] A multi-rod profiling device comprising a dovetail guide rail slider, a horizontal moving frame, a swing arm, a disc saw pruning device fixing frame and a linear guide rail slider, the dovetail guide rail slider being connected with the base and the horizontal moving frame, the horizontal moving frame being rotatably connected with the swing arm, the swing arm being fixedly connected with the disc saw pruning device fixing frame, the swing arm being connected with the linear guide rail slider, and the linear guide rail slider being located above the disc saw pruning device fixing frame;

[0007] Two disc saw pruning devices, wherein the upper disc saw pruning device is connected with the linear guide rail slider, and the lower disc saw pruning device is rotatably connected with the swing arm;

[0008] The hydraulic system includes a lateral adjustment cylinder, an angle adjustment cylinder, a circular saw trimming device angle adjustment cylinder, and an upward adjustment cylinder. The fixed end of the lateral adjustment cylinder is fixedly connected to the base, and the drive end of the lateral adjustment cylinder is connected to the lateral frame. The fixed end of the angle adjustment cylinder is connected to the lateral frame, and the output end of the angle adjustment cylinder is connected to the swing arm. The fixed end of the circular saw trimming device angle adjustment cylinder is connected to the circular saw trimming device mounting frame, and the output end of the circular saw trimming device angle adjustment cylinder is connected to the lower circular saw trimming device. The fixed end of the upward adjustment cylinder is connected to the swing arm, and the output end of the upward adjustment cylinder is connected to the upper circular saw trimming device.

[0009] As an optional solution for a fruit tree contour pruning machine, the circular saw pruning device includes a circular saw pruning device cover plate, a circular saw pruning device frame, and a circular saw staggered pruning mechanism. The circular saw pruning device cover plate is bolted to the circular saw pruning device frame, and the circular saw staggered pruning mechanism is rotatably connected to the circular saw pruning device frame and the circular saw pruning device cover plate.

[0010] As an optional solution for a fruit tree contour pruning machine, the circular saw staggered pruning mechanism includes a gear increaser, a drive shaft I, a driven shaft I, and two sets of transmission components. The gear increaser is fixed to the cover plate of the circular saw pruning device, and its output end is connected to the drive shaft I. The drive shaft I is installed between the cover plate of the circular saw pruning device and the frame of the circular saw pruning device via a bearing seat I. Each set of transmission components includes a synchronous pulley I, a synchronous belt I, and a tensioning wheel I. The drive shaft I drives two driven shafts I respectively through the two sets of synchronous pulleys I and the synchronous belt I. The tensioning wheel I is installed on the cover plate of the circular saw pruning device or the frame of the circular saw pruning device to tension the synchronous belt I. The front ends of the drive shaft I and the driven shaft I are provided with saw blade clamps, and saw blades are installed on each saw blade clamp. The front end lengths of the drive shaft I and the driven shaft I are different, so that the saw blades are staggered.

[0011] As an optional solution for a fruit tree contour pruning machine, the circular saw pruning device also includes a staggered branch-gathering mechanism, which comprises:

[0012] The drive assembly includes a motor mount, a bushing, and a drive shaft II. The motor mount is fixed to the cover plate of the circular saw trimming device. The drive shaft II is connected to the motor II through the bushing and is installed between the cover plate of the circular saw trimming device and the frame of the circular saw trimming device through the bearing seat II.

[0013] Two groups of execution components, each group of execution components includes synchronous pulley II, synchronous belt II, tension pulley II, driven shaft II and branch gathering assembly;The driving shaft II drives two driven shafts II through two groups of synchronous pulley II and synchronous belt II respectively, and the tension pulley II is installed on the disc saw trimming device cover plate or the disc saw trimming device rack to tension the synchronous belt II;

[0014] The branch gathering assembly includes branch gathering clamp and branch gathering disc, which are arranged at the front ends of the driving shaft II and the driven shaft II respectively, and the front end lengths of the driving shaft II and the driven shaft II are different, so that the branch gathering discs are staggered.

[0015] Beneficial effects: the utility model provides a fruit tree profiling pruning machine, through the multibar profiling device of setting up on the base realizes three -dimensional profiling, wherein the dovetail guide rail slider and horizontal moving frame cooperate to realize horizontal displacement adjustment, the swing arm is connected with horizontal moving frame through rotary connection mode to realize integral rotation angle adjustment, and simultaneously forms adjustable profiling mechanism with disc saw trimming device fixing frame. Two disc saw trimming devices adopt the mode of up and down arrangement to realize three -dimensional coverage to fruit tree canopy, and the upper trimming device realizes height adjustment through linear guide rail slider, and the lower trimming device realizes multi -angle adjustment through disc saw trimming device angle adjustment oil cylinder and swing arm rotary connection. The hydraulic system controls horizontal displacement through horizontal moving adjustment oil cylinder, angle adjustment oil cylinder drives swing arm rotation, and disc saw trimming device angle adjustment oil cylinder and up -moving adjustment oil cylinder cooperatively adjust the posture of trimming device, realize multi -freedom degree accurate motion control. The fruit tree profiling pruning machine cooperatively, makes disc saw trimming device can all -round adapt to the three -dimensional profile change of different fruit trees, not only solves the problem of insufficient profiling precision and poor adaptability of traditional equipment, but also significantly improves the trimming coverage range under complex tree shape through rotation adjustment function, greatly improves the efficiency and quality of trimming operation, simultaneously has operation flexible, adjustment accurate and other advantages, satisfies the demand of modernization orchard pruning equipment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of fruit tree profiling pruning machine provided by the utility model embodiment;

[0017] Figure 2 It is the structure schematic diagram of base and multibar profiling device provided by the utility model embodiment;

[0018] Figure 3 It is the structure schematic diagram of disc saw trimming device provided by the utility model embodiment;

[0019] Figure 4 It is the structure schematic diagram of disc saw staggered trimming mechanism provided by the utility model embodiment;

[0020] Figure 5It is the structural schematic view of the misplacement bunching mechanism provided by the embodiment of the utility model.

[0021] Figure 6 It is the structural schematic view of the bunching clamp provided by the embodiment of the utility model.

[0022] Figure 7 It is the structural schematic view of the bunching disc provided by the embodiment of the utility model.

[0023] Explanation of reference numerals:

[0024] 1, base; 11, three-point suspension frame; 12, base; 13, oil tank seat;

[0025] 2, multi-rod profiling device; 21, dovetail guide rail slider; 22, transverse moving frame; 23, swing arm; 24, disc saw pruning device fixing frame; 25, linear guide rail slider;

[0026] 3, disc saw pruning device; 31, disc saw pruning device cover plate; 32, disc saw pruning device rack; 33, disc saw misplacement pruning mechanism; 34, misplacement bunching mechanism; 35, baffle; 331, gear speed-up box; 332, bearing seat I; 333, driving shaft I; 334, synchronous pulley I; 335, synchronous belt I; 336, driven shaft I; 337, tension pulley I; 338, saw blade clamp; 339, saw blade; 341, motor seat; 342, shaft sleeve; 343, driving shaft II; 344, bearing seat II; 345, synchronous pulley II; 346, synchronous belt II; 347, tension pulley II; 348, driven shaft II; 349, bunching clamp; 3410, bunching disc;

[0027] 4, hydraulic system; 41, pump seat; 42, pump; 43, oil tank; 44, radiator; 45, valve block; 46, transverse moving adjusting oil cylinder; 47, angle adjusting oil cylinder; 48, disc saw pruning device angle adjusting oil cylinder; 49, upward moving adjusting oil cylinder; 410, motor I; 411, motor II. Specific implementation

[0028] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0029] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature therebetween. Moreover, the first feature "on", "above" and "over" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of the present application, the terms "up", "down", and other orientation or position relationships are based on the orientation or position relationships shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0032] The present application provides a fruit tree profiling pruning machine, such as Figures 1-7As shown, the fruit tree profiling pruning machine comprises a base 1, a multi-link profiling device 2, two disc saw pruning devices 3, and a hydraulic system 4. The multi-link profiling device 2 comprises a dovetail guide slide 21, a horizontal moving frame 22, a swing arm 23, a disc saw pruning device fixing frame 24, and a linear guide slide 25. The dovetail guide slide 21 is connected to the base 1 and the horizontal moving frame 22. The horizontal moving frame 22 is rotationally connected to the swing arm 23. The swing arm 23 is fixedly connected to the disc saw pruning device fixing frame 24. The swing arm 23 is connected to the linear guide slide 25, and the linear guide slide 25 is located above the disc saw pruning device fixing frame 24. The upper disc saw pruning device 3 is connected to the linear guide slide 25, and the lower disc saw pruning device 3 is rotationally connected to the swing arm 23. The hydraulic system 4 comprises a horizontal moving adjusting oil cylinder 46, an angle adjusting oil cylinder 47, a disc saw pruning device angle adjusting oil cylinder 48, and an upward moving adjusting oil cylinder 49. The fixed end of the horizontal moving adjusting oil cylinder 46 is fixedly connected to the base 1. The driving end of the horizontal moving adjusting oil cylinder 46 is connected to the horizontal moving frame 22. The fixed end of the angle adjusting oil cylinder 47 is connected to the horizontal moving frame 22. The output end of the angle adjusting oil cylinder 47 is connected to the swing arm 23. The fixed end of the disc saw pruning device angle adjusting oil cylinder 48 is connected to the disc saw pruning device fixing frame 24. The output end of the disc saw pruning device angle adjusting oil cylinder 48 is connected to the lower disc saw pruning device 3. The fixed end of the upward moving adjusting oil cylinder 49 is connected to the swing arm 23. The output end of the upward moving adjusting oil cylinder 49 is connected to the upper disc saw pruning device 3.

[0033] Three-dimensional stereoscopic profiling is realized by the multi-rod profiling device 2 arranged on the base 1, wherein the swallow-tail guide rail slider 21 cooperates with the transverse carriage 22 to realize horizontal displacement adjustment, the swing arm 23 is connected with the transverse carriage 22 in a rotary connection mode to realize overall rotation angle adjustment, and simultaneously forms an adjustable profiling mechanism with the disc saw trimming device fixing frame 24. Two disc saw trimming devices 3 are arranged in an upper-lower manner to realize three-dimensional coverage of the tree crown, the upper trimming device realizes height adjustment through the linear guide rail slider 25, and the lower trimming device realizes multi-angle adjustment through the rotary connection of the disc saw trimming device angle adjustment oil cylinder 48 and the swing arm 23. The hydraulic system 4 controls the horizontal displacement through the transverse adjustment oil cylinder 46, drives the swing arm 23 to rotate through the angle adjustment oil cylinder 47, and cooperates the disc saw trimming device angle adjustment oil cylinder 48 and the upward adjustment oil cylinder 49 to adjust the posture of the trimming device, so as to realize multi-degree-of-freedom precise motion control. The fruit tree profiling trimmer realizes the cooperation of the disc saw trimming device 3 to adapt to the three-dimensional profile changes of different fruit trees in all directions, not only solves the problems of insufficient profiling precision and poor adaptability of traditional equipment, but also significantly improves the trimming coverage range under complex tree shapes through the rotation adjustment function, greatly improves the efficiency and quality of trimming operation, has the advantages of flexible operation and precise adjustment, and meets the needs of modern orchard trimming equipment.

[0034] Specifically, the three-point suspension frame 11 is connected with the tractor, and the three-point suspension frame 11 and the oil tank seat 13 are welded on the base 12.

[0035] As shown in Figures 3-4 The disc saw trimming device 3 includes a disc saw trimming device cover plate 31, a disc saw trimming device frame 32, and a disc saw staggered trimming mechanism 33, the disc saw trimming device cover plate 31 is bolted with the disc saw trimming device frame 32, and the disc saw staggered trimming mechanism 33 is rotationally connected with the disc saw trimming device frame 32 and the disc saw trimming device cover plate 31.

[0036] As shown in Figure 4As shown, the disc saw misalignment pruning mechanism 33 comprises a gear speed-increasing box 331, a driving shaft I 333, a driven shaft I 336 and two sets of transmission assemblies; the gear speed-increasing box 331 is fixed on the disc saw pruning device cover plate 31, and its output end is connected with the driving shaft I 333; the driving shaft I 333 is installed between the disc saw pruning device cover plate 31 and the disc saw pruning device rack 32 through a bearing seat I 332; each set of the transmission assemblies comprises a synchronous belt pulley I 334, a synchronous belt I 335 and a tension pulley I 337, the driving shaft I 333 drives two driven shafts I 336 through two sets of the synchronous belt pulleys I 334 and the synchronous belts I 335 respectively, and the tension pulley I 337 is installed on the disc saw pruning device cover plate 31 or the disc saw pruning device rack 32 to tension the synchronous belt I 335; the front ends of the driving shaft I 333 and the driven shaft I 336 are each provided with a saw blade clamp 338, each saw blade clamp 338 is installed with a saw blade 339, and the front end lengths of the driving shaft I 333 and the driven shaft I 336 are different, so that each saw blade 339 is arranged in misalignment.

[0037] Specifically, the baffle 35 is welded at the front end of the disc saw pruning device rack 32.

[0038] As shown, Figure 5 As shown, the disc saw pruning device 3 further comprises a misalignment branch gathering mechanism 34, which comprises a driving assembly, two sets of execution assemblies, the driving assembly comprises a motor seat 341, a shaft sleeve 342 and a driving shaft II 343, the motor seat 341 is fixed on the disc saw pruning device cover plate 31, the driving shaft II 343 is connected with the motor II 411 through the shaft sleeve 342, and is installed between the disc saw pruning device cover plate 31 and the disc saw pruning device rack 32 through a bearing seat II 344; each set of the execution assemblies comprises a synchronous belt pulley II 345, a synchronous belt II 346, a tension pulley II 347, a driven shaft II 348 and a branch gathering assembly; the driving shaft II 343 drives two driven shafts II 348 through two sets of the synchronous belt pulleys II 345 and the synchronous belts II 346 respectively, and the tension pulley II 347 is installed on the disc saw pruning device cover plate 31 or the disc saw pruning device rack 32 to tension the synchronous belt II 346; the branch gathering assembly comprises a branch gathering clamp 349 and a branch gathering disc 3410, which are respectively arranged at the front ends of the driving shaft II 343 and the driven shaft II 348, and the front end lengths of the driving shaft II 343 and the driven shaft II 348 are different, so that each branch gathering disc 3410 is arranged in misalignment.

[0039] The hydraulic system 4 comprises a pump base 41, a pump 42, an oil tank 43, a radiator 44, a valve block 45, a horizontal adjustment oil cylinder 46, an angle adjustment oil cylinder 47, a disc saw pruning device angle adjustment oil cylinder 48, an upward adjustment oil cylinder 49, a motor I 410 and a motor II 411, the pump 42 is bolted with the pump base 41, the pump base 41 is bolted with the base 12, the oil tank 43 is fixed on the oil tank base 13, the valve block 45 and the radiator 44 are fixedly installed on the oil tank 43, the angle adjustment oil cylinder 46 is hingedly connected with the swing arm 23 and the horizontal moving frame 22 at two ends respectively, the upward adjustment oil cylinder 49 is connected with the linear guide sliding block 25 and the upper disc saw pruning device rack 32 at two ends respectively, the disc saw pruning device angle adjustment oil cylinder 48 is connected with the disc saw pruning device fixed frame 24 and the upper disc saw pruning device rack 32 at two ends respectively, the horizontal adjustment oil cylinder 46 is connected with the base 12 and the horizontal moving frame 22 at two ends respectively, the motor I 410 is fixed on the disc saw pruning device cover plate 31 through a gear speed increasing box 331 and transmits power through a driving shaft I 333, each disc saw pruning device 3 comprises two groups of motor I 410, the motor II 411 is bolted with a motor base 341 and transmits power through a driving shaft II 343.

[0040] The working process of the fruit tree profiling pruning machine provided by the embodiment is as follows:

[0041] Before work, firstly, the three-point suspension frame 11 is hung with a tractor, the profiling pruning device is brought to an initial working position, the pruning position is adjusted through the angle adjustment oil cylinder 34, the upward adjustment oil cylinder 35, the disc saw pruning device angle adjustment oil cylinder 36 and the horizontal adjustment oil cylinder 37, the motor I 410 and the motor II 411 work at a predetermined speed, and the branch gathering and pruning work is performed.

[0042] Obviously, the above embodiment of the utility model is only an example for clearly explaining the utility model, and is not a limitation on the embodiment of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A fruit tree contouring pruning machine characterized by, It includes: Base (1); Multi-rod profiling device (2), including dovetail guide rail slider (21), horizontal moving frame (22), swing arm (23), disc saw trimming device fixing frame (24) and linear guide rail slider (25), the dovetail guide rail slider (21) is connected the base (1) and the horizontal moving frame (22), the horizontal moving frame (22) is rotatably connected with the swing arm (23), the swing arm (23) is fixedly connected with the disc saw trimming device fixing frame (24), the swing arm (23) is connected with the linear guide rail slider (25), and the linear guide rail slider (25) is located above the disc saw trimming device fixing frame (24); Two disc saw trimming devices (3), wherein the upper disc saw trimming device (3) is connected with the linear guide rail slider (25), and the lower disc saw trimming device (3) is rotatably connected with the swing arm (23); Hydraulic system (4), including horizontal moving adjusting oil cylinder (46), angle adjusting oil cylinder (47), disc saw trimming device angle adjusting oil cylinder (48), up-moving adjusting oil cylinder (49), the fixed end of the horizontal moving adjusting oil cylinder (46) is fixedly connected with the base (1), the driving end of the horizontal moving adjusting oil cylinder (46) is connected with the horizontal moving frame (22), the fixed end of the angle adjusting oil cylinder (47) is connected with the horizontal moving frame (22), the output end of the angle adjusting oil cylinder (47) is connected with the swing arm (23), the fixed end of the disc saw trimming device angle adjusting oil cylinder (48) is connected with the disc saw trimming device fixing frame (24), the output end of the disc saw trimming device angle adjusting oil cylinder (48) is connected with the lower disc saw trimming device (3), the fixed end of the up-moving adjusting oil cylinder (49) is connected with the swing arm (23), and the output end of the up-moving adjusting oil cylinder (49) is connected with the upper disc saw trimming device (3).

2. The fruit tree contour trimmer of claim 1, wherein, The disc saw trimming device (3) includes disc saw trimming device cover plate (31), disc saw trimming device rack (32) and disc saw misalignment trimming mechanism (33), the disc saw trimming device cover plate (31) is bolted with the disc saw trimming device rack (32), and the disc saw misalignment trimming mechanism (33) is rotatably connected with the disc saw trimming device rack (32) and the disc saw trimming device cover plate (31).

3. The fruit tree profile trimmer of claim 2, wherein, The disc saw misalignment pruning mechanism (33) comprises a gear speed-increasing box (331), a driving shaft I (333), a driven shaft I (336) and two groups of transmission assemblies; the gear speed-increasing box (331) is fixed on the disc saw pruning device cover plate (31), and the output end thereof is connected with the driving shaft I (333); the driving shaft I (333) is installed between the disc saw pruning device cover plate (31) and the disc saw pruning device rack (32) through a bearing seat I (332); each group of the transmission assemblies comprises a synchronous pulley I (334), a synchronous belt I (335) and a tension pulley I (337), the driving shaft I (333) drives two driven shafts I (336) through two groups of the synchronous pulley I (334) and the synchronous belt I (335) respectively, and the tension pulley I (337) is installed on the disc saw pruning device cover plate (31) or the disc saw pruning device rack (32) to tension the synchronous belt I (335); the front ends of the driving shaft I (333) and the driven shaft I (336) are each provided with a saw blade clamp (338), each saw blade clamp (338) is installed with a saw blade (339), and the front end lengths of the driving shaft I (333) and the driven shaft I (336) are different, so that each saw blade (339) is arranged in misalignment.

4. The fruit tree profiling trimmer according to claim 3, characterized in that, The disc saw pruning device (3) further comprises a misalignment branch gathering mechanism (34), the misalignment branch gathering mechanism (34) comprises: a driving assembly comprising a motor seat (341), a shaft sleeve (342) and a driving shaft II (343), the motor seat (341) is fixed on the disc saw pruning device cover plate (31), the driving shaft II (343) is connected with a motor II (411) through the shaft sleeve (342) and is installed between the disc saw pruning device cover plate (31) and the disc saw pruning device rack (32) through a bearing seat II (344); two groups of execution assemblies, each group of the execution assemblies comprises a synchronous pulley II (345), a synchronous belt II (346), a tension pulley II (347), a driven shaft II (348) and a branch gathering assembly; the driving shaft II (343) drives two driven shafts II (348) through two groups of the synchronous pulley II (345) and the synchronous belt II (346) respectively, and the tension pulley II (347) is installed on the disc saw pruning device cover plate (31) or the disc saw pruning device rack (32) to tension the synchronous belt II (346); the branch gathering assembly comprises a branch gathering clamp (349) and a branch gathering disc (3410), which are respectively arranged at the front ends of the driving shaft II (343) and the driven shaft II (348), and the front end lengths of the driving shaft II (343) and the driven shaft II (348) are different, so that each branch gathering disc (3410) is arranged in misalignment.

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