CN113475258B

CN113475258B - Walnut tree pruning device and method

Info

Publication number: CN113475258B
Application number: CN202110825134.7A
Authority: CN
Inventors: 张兆欣; 谢守江; 张涛; 张丽敏; 刘焕; 程国华; 魏鸿利; 郭栋; 赵宁宁; 李钢建; 申艳普; 李文娟; 魏红; 魏瑞芳; 孙利娟; 郭圆圆
Original assignee: PUYANG ACADEMY OF FOREST
Current assignee: PUYANG ACADEMY OF FOREST
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2023-01-10
Anticipated expiration: 2041-07-21
Also published as: CN113475258A

Abstract

The invention discloses a walnut tree pruning device and method, which comprises a shell with hollow structures at the upper end and the lower end and a tightening wheel mechanism slidably mounted on the shell, wherein the lower end of the shell is connected with a steering structure for adjusting the use angle of the shell, the end angle of the shell is provided with a roller assembly, the tightening wheel mechanism can push a connecting rod mechanism after contacting with a support rod or pull the support rod by a rotating claw mechanism so as to facilitate a scissor mechanism to realize feed shearing, so that different pruning tools and pruning methods can be used according to different branches, the stability in the walnut tree pruning process is improved, the functionality of a pruning tool is increased, the walnut tree pruning device is suitable for shearing operations of different branches with different softness and hardness, the shell angle can be adjusted according to the height of the branches and the branch angle, the cutting position of the scissor mechanism can be matched with the specific position of the branch, the walnut tree pruning operation can be rapidly carried out, the shearing efficiency can be improved, and meanwhile, various shearing requirements can be met.

Description

Walnut tree pruning device and method

Technical Field

The invention belongs to the technical field related to branch pruning tools, and particularly relates to a walnut tree pruning device and method.

Background

In the walnut trees entering the fruiting period, due to the reasons of gradually strengthening centrifugal growth, increasing fruit load and the like, crowns are gradually opened, if timely pruning is not carried out, the crown expansion capacity is weakened along with the increase of fruiting amount, so that expansion is stopped, drooping branches and thin and weak branches are increased, fruiting parts move outwards, crowns are poorly ventilated, and branches are weakened and withered.

The existing walnut tree pruning technology has the following problems: traditional walnut pruning adopts artifical manual holding pruning utensil to prune the branch, prunes inefficiency, and consumes time and manpower, and the security is poor in addition, has strict requirements to personnel's technique, runs into the branch and is difficult to cut when harder to influence output.

Disclosure of Invention

The invention aims to provide a walnut tree pruning device and method, and aims to solve the problems of time and labor waste, poor safety and difficulty in pruning when branches are hard in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a walnut pruning device, includes that both ends are hollow structure's casing and slidable mounting tighten the wheel mechanism on the casing from top to bottom, the lower extreme of casing is connected with the structure that turns to that is used for adjusting casing application angle, wheel components is installed to the end angle department of casing, the last transmission of wheel components is connected with the chain mechanism who is used for cutting the branch, tighten and install the scissors mechanism that is used for carrying out the shearing to harder branch on the wheel mechanism, be provided with on the casing and be used for cooperating scissors mechanism and carry out the auxiliary device sheared to harder branch.

Preferably, the auxiliary device comprises a link mechanism for driving the scissors mechanism to approach the branch and cut the branch, the link mechanism comprises a return spring, an outer slide bar, an inner slide bar and a fixed bar, a straight chute and a curved chute are formed in the outer wall of the shell, one end of the outer slide bar is connected with the straight chute in a sliding manner, the other end of the outer slide bar is connected with one end of a pull bar in a rotating manner, the other end of the pull bar is connected with a handle in a rotating manner, one end of the inner slide bar is connected with the curved chute in a sliding manner, a connecting bar is arranged between the pull bar and the shell in a parallel manner, one end of the connecting bar is hinged to the outer slide bar and the inner slide bar respectively, the fixed bar is fixedly connected with the inner wall of the shell, one end of the return spring is fixedly connected with the fixed bar, and the other end of the return spring is fixedly connected with the outer slide bar.

Preferably, auxiliary device is including being used for carrying out the rotatory hook mechanism of shearing with the branch hook to scissors mechanism, rotatory hook mechanism includes the brace table, brace table fixed connection is on the casing, fixed mounting has vertical motor on the outer wall of brace table, the circular chassis of output shaft fixedly connected with of vertical motor, fixedly connected with motor box on the chassis, the circular slot has been seted up on two lateral walls of motor box respectively, fixed mounting has horizontal motor on one side inner wall of motor box, horizontal motor's output is connected with the horizontal axis, both ends of horizontal axis pass both sides circular slot respectively, the intermediate position vertical fixation of horizontal axis has the rocking bar, the other end fixedly connected with hook of rocking bar.

Preferably, the roller assembly comprises a lower roller, a middle roller and an upper roller, the lower roller and the upper roller are both rotatably connected with the inner wall of the shell, a one-way motor is fixedly mounted on the outer wall of the shell, and an output shaft of the one-way motor penetrates through the circle center of the shell and is fixedly connected with the lower roller.

Preferably, the tightening wheel mechanism comprises a forward and reverse rotation motor, an upper notch is formed in the side wall of the shell, a motor shaft is fixedly connected to the output end of the forward and reverse rotation motor, a bearing is arranged between the forward and reverse rotation motor and the middle roller, the outer ring wall of the bearing is in sliding connection with the upper notch, one side face of the bearing is rotatably connected with the forward and reverse rotation motor, the other side face of the bearing is rotatably connected with the middle roller, a spring is arranged in the upper notch, one end of the spring is fixedly connected with the outer ring wall of the bearing, and the other end of the spring is fixedly connected with the inner wall of the upper notch.

Preferably, the scissors mechanism includes the long connecting rod and the short connecting rod of rim plate and two position symmetries, the centre of a circle department of well gyro wheel offers the hole groove that is used for the motor shaft to pass, the one end of motor shaft passes the hole groove and the centre of a circle department fixed connection of scissors mechanism upper disc, fixedly connected with top shoe on the skew one side outer wall in the centre of a circle of rim plate, the notch has been seted up to the one end of long connecting rod, the top shoe is in the notch, the left tool bit of one end fixedly connected with of long connecting rod, slider under fixedly connected with on the skew opposite side outer wall in the centre of a circle of rim plate, the notch has also been seted up to the one end of short connecting rod, the slider is in the notch of short connecting rod down, the other end fixedly connected with right tool bit of short connecting rod, long connecting rod and short connecting rod pass through the articulated shaft and articulate, left side tool bit and right tool bit are laminated mutually.

Preferably, chain mechanism includes pull handle, well articulated shaft and belt, the one end of connecting rod articulates on well articulated shaft, the one end and the well articulated shaft of pull handle rotate to be connected, the other end fixedly connected with spliced pole of pull handle, the belt closure encircles on gyro wheel down, well gyro wheel and last gyro wheel, two belt grooves have been seted up on the both sides outer wall of belt, the spliced pole slip joint is in the belt groove, the outer fixed surface of belt is connected with a plurality of arc toothings, the fixed a plurality of toothings that are provided with on the intrados of toothings.

Preferably, turn to the structure and include the set casing, the lower extreme outside at the casing is established to fixed housing cover, the set casing is articulated through articulated shaft down with the casing, the turn trough has been seted up on the set casing, fixedly connected with threaded rod on the lower extreme outer wall of casing, the threaded rod slides and sets up in the turn trough, the outside threaded connection of threaded rod has a screw thread section of thick bamboo, the lower extreme fixedly connected with of set casing holds the pole.

A walnut tree pruning method comprises the following steps:

the method comprises the following steps: adjusting the use angle of the shell, wherein the threaded cylinder is in a locking state initially, the holding rod is held by one hand, the threaded cylinder is rotated by the other hand along the reverse thread direction, the threaded cylinder moves away from the fixed shell along the threaded rod, so that the threaded cylinder is in a non-locking state, the threaded cylinder can be slid to drive the threaded rod to move along the in-groove direction of the rotary groove, the threaded rod drives the shell to rotate along the lower hinged shaft as an axis, so that the proper position is adjusted, after the adjustment is finished, the threaded cylinder is rotated along the thread direction, so that the threaded cylinder moves close to the fixed shell along the threaded rod, when the lower surface of the threaded cylinder is tightly attached to the upper surface of the fixed shell, the threaded cylinder is fixed, the threaded rod is fixed, the position of the shell is driven to be fixed, and the angle adjustment is finished;

step two: when the soft tree branches are cut, the one-way motor is started, the one-way motor drives the lower roller to rotate through the output shaft, so that the belt which is tightly driven with the lower roller is driven to rotate, the belt rotates to drive the large teeth to move along the direction of the cutting edge, and when the cutting edge contacts the tree branches, the cutting can be started;

step three: the cutting method comprises the following steps that (1) a positive and negative rotation motor is turned on for cutting harder branches, the positive and negative rotation motor drives a wheel disc to rotate through a motor shaft, when the positive and negative rotation motor rotates positively, the wheel disc rotates positively, an upper sliding block rotates clockwise along the motor shaft as a circle center, so that the upper sliding block slides along the inner wall of a notch, and a long connecting rod is pushed to rotate anticlockwise along an upper hinging shaft for a certain angle, so that a left cutter head is driven to rotate, meanwhile, a lower sliding block rotates clockwise along the circle center of the motor shaft, so that the lower sliding block slides along the inner wall of the notch of a short connecting rod, and the short connecting rod is pushed to rotate clockwise along the upper hinging shaft for a certain angle, and the rotating angles of the long connecting rod and the short connecting rod are the same, so that the right cutter head can be driven to rotate, the long connecting rod before rotating passes through a positive rotation period, so that the position of the short connecting rod before rotating coincides with the position of the long connecting rod before rotating, and the short connecting rod after a positive and negative rotation period, the long connecting rod and the short connecting rod are reset, and the left cutter head and the right cutter head are alternated, so that the purpose of cutting is achieved;

step four: firstly, a belt is attached to a branch, so that the branch is arranged between two large teeth, a handle is pulled downwards, the handle drives a pull rod to move downwards, the pull rod drives an outer sliding rod to move along a straight sliding groove towards a direction far away from a fixed rod, so that a reset spring is pulled, the outer sliding rod drives a connecting rod to move downwards, the outer sliding rod drives an inner sliding rod to move in a bent sliding groove towards a direction far away from the fixed rod, so that the connecting rod makes a rotating motion with a center shaft of the inner sliding rod as a center of a circle, a connecting rod mechanism on the other side makes a symmetrical motion, a middle articulated shaft can make a middle articulated shaft move along the direction of a notch of an upper notch and in a direction close to a tightening wheel mechanism due to the motion of the two connecting rods, the middle articulated shaft drives a connecting rod to move along the same direction through the pull handle, the pull handle pulls the belt which is connected with the pull handle in a sliding manner, so that the belt is bent inwards due to the drive of the pull handle, the two large teeth which are bent out, the two large teeth on the two sides are bent inwards and bent around the center of the bending point, so that the branch can be clamped, and small teeth on the inner side of the large teeth can clamp the branch along with the movement of the large teeth;

step five: one end of the belt deforms due to the pulling of the branches, so that the other end, far away from a bending point, of the belt is pulled inwards, the middle roller is pulled to move in the direction close to the bending point of the belt along the direction of the upper notch, the middle roller drives the motor shaft and the bearing to move in the same direction and extrude the spring, meanwhile, the motor shaft drives the scissors mechanism to move in the direction of the upper notch, the purpose of feeding is achieved, when the branches are clamped, the scissors mechanism achieves feeding shearing, and accordingly shearing work is started;

step six: when the shearing work is finished, the forward and reverse rotating motor is turned off, the scissors mechanism stops working, the handle is loosened, the outer sliding rod resets under the pulling of the reset spring, the connecting rod resets, the connecting column resets simultaneously, the belt is restored to the original state, and the scissors mechanism retracts.

A walnut tree pruning method comprises the following steps:

the method comprises the following steps: adjusting the use angle of the shell, wherein the thread cylinder is in a locking state initially, the holding rod is held by one hand, the thread cylinder is rotated by the other hand along the reverse thread direction, the thread cylinder moves along the thread rod to be far away from the fixed shell, so that the thread cylinder is in a non-locking state, the thread cylinder can be slid to drive the thread rod to move along the in-groove direction of the rotary groove, the thread rod drives the shell to rotate along the lower hinged shaft as an axis, so that the proper position is adjusted, after the adjustment is finished, the thread cylinder is rotated along the thread direction, so that the thread cylinder moves close to the fixed shell along the thread rod, when the lower surface of the thread cylinder is tightly attached to the upper surface of the fixed shell, the thread cylinder is fixed, the thread rod is fixed, the position of the shell is driven to be fixed, and the angle adjustment is finished at the moment;

step three: the cutting method comprises the following steps of cutting harder branches, turning on a forward and reverse rotation motor, driving a wheel disc to rotate by the forward and reverse rotation motor through a motor shaft, when the forward and reverse rotation motor rotates forwards, enabling an upper sliding block to rotate clockwise along the motor shaft as a circle center, enabling the upper sliding block to slide along the inner wall of a notch, pushing a long connecting rod to rotate anticlockwise for a certain angle along an upper hinged shaft, driving a left cutter head to rotate, meanwhile, enabling a lower sliding block to rotate clockwise along the circle center of the motor shaft, enabling the lower sliding block to slide along the inner wall of the notch of a short connecting rod, pushing the short connecting rod to rotate clockwise for a certain angle along the upper hinged shaft, enabling the long connecting rod to be identical with the short connecting rod in rotation angle, driving a right cutter head to rotate, enabling the long connecting rod before rotating to pass through a forward rotation period, enabling the short connecting rod to pass through a forward rotation period, enabling the position of the long connecting rod before rotating to coincide with the position of the long connecting rod before rotating, enabling the long connecting rod and the short connecting rod to reset after a forward and reverse rotation period, enabling the long connecting rod and the right cutter head to alternate with each other, and achieving the purpose of cutting;

step four: the vertical motor is started, so that the motor box is driven by the output shaft of the vertical motor to rotate along the output shaft of the vertical motor as an axis simultaneously, the angle of the swing rod and the angle of the hook claw are adjusted, the hook claw rotates on a plane parallel to the shell and can better hook a tree branch, when the hook claws on two sides hook a tree branch, the vertical motor is closed, the horizontal motors on two sides are started, the steering directions of the horizontal motors on two sides are opposite, the horizontal shafts of the horizontal motors rotate to drive the swing rod to rotate by taking the horizontal shafts as the axis, the hook claws on two sides rotate towards the direction far away from the belt by taking the horizontal shafts as the axis respectively, and the tree branch is close to the belt under the pulling of the hook claw;

step five: when the branches are attached to the belt and the outer side of the belt is extruded under the driving of the pulling force of the hook claw, the belt is bent inwards, two large teeth at two sides which are bent inwards by taking a bending point as a circle center, so that the branches are clamped, and small teeth at the inner sides of the large teeth clamp the branches along with the movement of the large teeth;

step six: one end of the belt deforms due to the pulling of the branches, so that the other end, far away from a bending point, of the belt is pulled inwards, the middle roller is pulled to move in the direction close to the bending point of the belt along the direction of the upper notch, the middle roller drives the motor shaft and the bearing to move in the same direction and extrude the spring, meanwhile, the motor shaft drives the scissors mechanism to move in the direction of the upper notch, the purpose of feeding is achieved, when the branches are clamped, the scissors mechanism achieves feeding shearing, and accordingly shearing work is started;

step seven: when the shearing work is finished, the branches are sheared by the scissors mechanism, the belt loses the pressure of the branches on the belt, and the belt is restored to the original state under the restoring action of the spring, so that the scissors mechanism is restored, the forward and reverse rotating motor is turned off, and the shearing work is finished.

Compared with the existing walnut tree pruning technology, the walnut tree pruning device and method provided by the invention have the following beneficial effects:

1. according to the walnut tree pruning machine, the connecting rod mechanism is pushed after the tensioning wheel mechanism is contacted with the supporting rod, or the rotating claw mechanism pulls the supporting rod, so that the scissors mechanism is convenient to realize feed cutting, therefore, different pruning appliances and pruning methods can be used according to different branches, the stability in the walnut tree pruning process is improved, the functionality of the pruning tool is improved, and the walnut tree pruning machine is suitable for the shearing operation of different branches with different hardness;

2. according to the invention, the angle of the shell can be adjusted according to the height of the branches and the angle of the branches, so that the cutting position of the scissor mechanism can be matched with the specific position of the branches, the scissor mechanism can be quickly sheared, the shearing efficiency can be improved, various shearing requirements can be met, and meanwhile, the safety is high, and the operation is convenient;

3. according to the invention, by arranging the structural form that the link mechanism or the rotary claw mechanism is combined with the tightening wheel mechanism, branches can be clamped in advance before shearing, a certain cutting effect is achieved while the branches are clamped, and the cutting feed shearing is realized by the subsequent scissors mechanism, so that the shearing work is started, the burden of the scissors mechanism can be reduced while the shearing stability is maintained, and the service life of the scissors mechanism is prolonged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

fig. 1 is a schematic front structural view of a pruning device according to an embodiment of the present invention;

fig. 2 is a schematic back structure diagram of a pruning device according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a tightening wheel mechanism according to the present invention;

FIG. 4 is a schematic front view of the scissors mechanism of the present invention;

FIG. 5 is a schematic view of the back structure of the scissors mechanism according to the present invention;

FIG. 6 is a schematic structural diagram of a link mechanism according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a structure of a chain-link mechanism according to an embodiment of the present invention;

FIG. 8 is a schematic view of a turning structure according to the present invention;

fig. 9 is a schematic front structural view of a pruning device according to a second embodiment of the present invention;

FIG. 10 is a schematic view of a back side structure of a pruning device according to a second embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a second chain mechanism according to an embodiment of the present invention;

FIG. 12 is a schematic structural view of a rotary claw mechanism according to a second embodiment of the present invention;

in the figure: 1. a tightening wheel mechanism; 2. a scissor mechanism; 3. a link mechanism; 4. a chain mechanism; 5. a steering structure; 6. a rotating hook mechanism; 8. a housing; 9. a unidirectional motor; 10. a handle; 11. a positive and negative rotation motor; 12. a bearing; 13. a spring; 14. an upper notch; 21. a motor shaft; 22. a wheel disc; 23. a long connecting rod; 24. an upper slide block; 25. an upper articulated shaft; 26. a left cutter head; 27. a short connecting rod; 28. a right cutter head; 29. a lower slide block; 31. an outer slide bar; 32. a straight chute; 33. a pull rod; 34. an inner slide bar; 35. bending the chute; 36. a fixing rod; 37. a return spring; 38. a connecting rod; 41. pulling a handle; 42. a middle articulated shaft; 43. connecting columns; 44. a belt; 45. a belt groove; 46. a large tooth; 47. a small tooth; 51. a stationary housing; 52. rotating the groove; 53. a lower hinge shaft; 54. a threaded rod; 55. a threaded barrel; 56. a hand-held lever; 61. a support table; 62. a vertical motor; 63. a motor case; 64. a horizontal motor; 65. a horizontal axis; 66. a rocking beam; 67. a hook claw; 71. a lower roller; 72. a middle roller; 73. and (4) mounting a roller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-12, the present invention provides a technical solution with the following two embodiments:

example one

A walnut tree pruning device comprises a shell 8 with a hollow structure at the upper end and the lower end, and a tightening wheel mechanism 1 (shown in figures 1 and 2) arranged on the shell 8 in a sliding manner, wherein the tightening wheel mechanism 1 comprises a forward and reverse rotating motor 11, a notch 14 is formed in the side wall of the shell 8, an output end of the forward and reverse rotating motor 11 is fixedly connected with a motor shaft 21, a bearing 12 is arranged between the forward and reverse rotating motor 11 and a middle roller 72, the outer ring wall of the bearing 12 is connected with the upper notch 14 in a sliding manner, one side surface of the bearing 12 is connected with the forward and reverse rotating motor 11 in a rotating manner, the other side surface of the bearing 12 is connected with the middle roller 72 in a rotating manner, a spring 13 is arranged in the upper notch 14, one end of the spring 13 is fixedly connected with the outer ring wall of the bearing 12, and the other end of the spring 13 is fixedly connected with the inner wall of the upper notch 14.

It should be noted that, the lower extreme of casing 8 is connected with the structure 5 that turns to (as shown in fig. 8) that is used for adjusting casing 8 use angle, turn to structure 5 and include set casing 51, set casing 51 cover is established at the lower extreme outside of casing 8, set casing 51 is articulated through articulated shaft 53 down with casing 8, set up on the set casing 51 and have turned round the groove 52, fixedly connected with threaded rod 54 on the lower extreme outer wall of casing 8, threaded rod 54 slides and sets up in turning round the groove 52, the outside threaded connection of threaded rod 54 has a screw thread section of thick bamboo 55, the lower extreme fixedly connected with of set casing 51 holds pole 56.

It is worth understanding that, a roller assembly is installed at an end corner of the housing 8, the roller assembly includes a lower roller 71, a middle roller 72 and an upper roller 73, the lower roller 71 and the upper roller 73 are both rotatably connected with an inner wall of the housing 8 (as shown in fig. 1), a one-way motor 9 is fixedly installed on an outer wall of the housing 8, an output shaft of the one-way motor 9 passes through a center of circle of the housing 8 and the lower roller 71 and is fixedly connected, a chain mechanism 4 for cutting branches is drivingly connected to the roller assembly (as shown in fig. 7), the chain mechanism 4 includes a pull handle 41, a middle articulated shaft 42 and a belt 44, one end of the connecting rod 38 is articulated to the middle articulated shaft 42, one end of the pull handle 41 is rotatably connected to the middle articulated shaft 42, the other end of the pull handle 41 is fixedly connected with a connecting rod 43, the belt 44 is closed and surrounds the lower roller 71, the middle roller 72 and the upper roller 73, two side outer walls of the belt 44 are provided with two belt grooves 45, the connecting rod 43 is slidably engaged in the belt groove 45, the outer surface of the belt 44 is fixedly connected with a plurality of arc-shaped large teeth 46, and a plurality of small teeth 47 are fixedly provided on inner arc surfaces of the large teeth 46.

It should be noted that, a scissors mechanism 2 (as shown in fig. 4 and 5) for shearing a harder trunk is installed on the tightening wheel mechanism 1, the scissors mechanism 2 includes a wheel disc 22 and two long connecting rods 23 and two short connecting rods 27 which are symmetrical in position, a hole slot for the motor shaft 21 to pass through is opened at the center of a circle of the middle roller 72, one end of the motor shaft 21 passes through the hole slot and is fixedly connected with the center of a circle of the upper wheel disc 22 of the scissors mechanism 2, an upper slider 24 is fixedly connected to the outer wall of one side of the wheel disc 22 deviating from the center of a circle, a notch is opened at one end of the long connecting rod 23, the upper slider 24 is located in the notch, one end of the long connecting rod 23 is fixedly connected to a left cutter head 26, a lower slider 29 is fixedly connected to the outer wall of the other side of the wheel disc 22 deviating from the center of a circle, a notch is also opened at one end of the short connecting rod 27, the lower slider 29 is located in the notch of the short connecting rod 27, the other end of the short connecting rod 27 is fixedly connected to a right cutter head 28, the long connecting rod 23 is hinged to the short connecting rod 27 through an upper hinge shaft 25, and the left cutter head 26 is attached to the right cutter head 28.

It is worth noting that the casing 8 is provided with an auxiliary device for shearing the harder branches in cooperation with the scissors mechanism 2, the auxiliary device includes a link mechanism 3 (as shown in fig. 6 and 7) for driving the scissors mechanism 2 to approach the branches and shear the hard branches, the link mechanism 3 includes a return spring 37, an outer slide bar 31, an inner slide bar 34 and a fixing rod 36, a straight slide groove 32 and a curved slide groove 35 are formed in the outer wall of the casing 8, one end of the outer slide bar 31 is slidably connected with the straight slide groove 32, the other end of the outer slide bar 31 is rotatably connected with one end of a pull rod 33, the other end of the pull rod 33 is rotatably connected with the handle 10, one end of the inner slide bar 34 is slidably connected with the curved slide groove 35, a connecting rod 38 is parallelly arranged between the pull rod 33 and the casing 8, one end of the connecting rod 38 is respectively hinged with the outer slide bar 31 and the inner slide bar 34, the fixing rod 36 is fixedly connected with the inner wall of the casing 8, one end of the return spring 37 is fixedly connected with the fixing rod 36, and the other end of the return spring 37 is fixedly connected with the outer slide bar 31.

A walnut tree pruning method comprises the following steps:

the method comprises the following steps: adjusting the use angle of the shell 8, wherein the threaded cylinder 55 is in a locking state initially, the holding rod 56 is held by one hand, the threaded cylinder 55 is rotated by the other hand in the reverse thread direction, the threaded cylinder 55 moves along the threaded rod 54 away from the fixed shell 51, so that the threaded cylinder 55 is in a non-locking state, the threaded cylinder 55 can slide to drive the threaded rod 54 to move along the in-groove direction of the rotating groove 52, the threaded rod 54 drives the shell 8 to rotate along the lower hinge shaft 53 as an axis, so as to adjust a proper position, after the adjustment is finished, the threaded cylinder 55 is rotated along the thread direction, so that the threaded cylinder 55 moves close to the fixed shell 51 along the threaded rod 54, and when the lower surface of the threaded cylinder 55 is tightly attached to the upper surface of the fixed shell 51, the threaded cylinder 55 is fixed, the threaded rod 54 is fixed, the shell 8 is driven to be fixed, and the angle adjustment is finished;

step two: when cutting softer branches, the unidirectional motor 9 is started, the unidirectional motor 9 drives the lower roller 71 to rotate through the output shaft, so that the belt 44 which is tightly driven with the lower roller 71 is driven to rotate, the belt 44 rotates to drive the large teeth 46 to move along the direction of the cutting edge, and when the cutting edge contacts the branches, cutting can be started;

step three: cutting harder branches, turning on a forward and reverse rotation motor 11, wherein the forward and reverse rotation motor 11 drives a wheel disc 22 to rotate through a motor shaft 21, when the forward and reverse rotation motor 11 rotates forwards, the wheel disc 22 rotates forwards, an upper sliding block 24 rotates clockwise along the motor shaft 21 as a circle center, so that the upper sliding block 24 slides along the inner wall of a notch, and pushes a long connecting rod 23 to rotate anticlockwise for a certain angle along an upper hinge shaft 25, so as to drive a left cutter head 26 to rotate, meanwhile, a lower sliding block 29 rotates clockwise along the circle center of the motor shaft 21, so that the lower sliding block 29 slides along the inner wall of the notch of a short connecting rod 27, and pushes the short connecting rod 27 to rotate clockwise for a certain angle along the upper hinge shaft 25, and the long connecting rod 23 and the short connecting rod 27 rotate at the same angle, so as to drive the right cutter head 28 to rotate, and the long connecting rod 23 before rotating passes through a forward rotation period, so that the position of the long connecting rod 23 and the short connecting rod 27 before rotating coincides with the position of the long connecting rod 23 before rotating, and the reverse rotation at the same time, and after a forward rotation period, the long connecting rod 23 and the short connecting rod 27 return to the left cutter head 26 and the right cutter head 28 alternately, so as to cut;

step four: firstly, a belt 44 is attached to a branch, so that the branch is located between two large teeth 46, the handle 10 is pulled downwards, the handle 10 drives the pull rod 33 to move downwards, the pull rod 33 drives the outer slide bar 31 to move along the straight slide groove 32 in a direction away from the fixed rod 36, so that the return spring 37 is pulled, the outer slide bar 31 drives the connecting rod 38 to move downwards, the outer slide bar 31 drives the inner slide bar 34 to move in the bending slide groove 35 in a direction away from the fixed rod 36, so that the connecting rod 38 rotates around the central axis of the inner slide bar 34 as a circle center, the link mechanism 3 on the other side moves symmetrically, due to the movement of the two connecting rods 38, the middle hinge shaft 42 can move along the notch direction of the upper notch 14 and in a direction close to the tightening wheel mechanism 1, the middle hinge shaft 42 drives the connecting rod 43 to move in the same direction through the pull handle 41, the pull handle 41 pulls the belt 44 connected with the pull handle 41 in a sliding manner, so that the belt 44 is driven by the pull handle 41 to be bent inwards, at this time, the two large teeth 46 bent at the same time, the bending points of the inner sides of the hinge shaft, and the small teeth 47 of the large teeth are clamped by the small teeth 46 move, so as the circle center of the branch 46, the branch 46 is clamped;

step five: one end of the belt 44 is deformed due to the pulling of tree branches, so that the other end of the belt 44, which is far away from the bending point, is pulled inwards, the middle roller 72 is pulled to move in the direction close to the bending point of the belt 44 along the direction of the upper notch 14, the middle roller 72 drives the motor shaft 21 and the bearing 12 to move in the same direction and extrude the spring 13, and meanwhile, the motor shaft 21 drives the scissor mechanism 2 to move along the direction of the upper notch 14, so that the purpose of feeding is achieved, when tree branches are clamped, the scissor mechanism 2 achieves feeding and shearing, and therefore shearing work is started;

step six: when the shearing work is finished, the forward and reverse rotation motor 11 is turned off, the scissors mechanism 2 stops working, the handle 10 is loosened, the outer sliding rod 31 is reset under the pulling of the reset spring 37, the connecting rod 38 is reset, the connecting column 43 is reset simultaneously, the belt 44 is restored, and the scissors mechanism 2 retracts.

Example two

A walnut tree pruning device comprises a shell 8 with a hollow structure at the upper end and the lower end, and a tightening wheel mechanism 1 (shown in figures 9 and 10) arranged on the shell 8 in a sliding manner, wherein the tightening wheel mechanism 1 comprises a forward and reverse rotating motor 11, a notch 14 is formed in the side wall of the shell 8, an output end of the forward and reverse rotating motor 11 is fixedly connected with a motor shaft 21, a bearing 12 is arranged between the forward and reverse rotating motor 11 and a middle roller 72, the outer ring wall of the bearing 12 is connected with the upper notch 14 in a sliding manner, one side surface of the bearing 12 is connected with the forward and reverse rotating motor 11 in a rotating manner, the other side surface of the bearing 12 is connected with the middle roller 72 in a rotating manner, a spring 13 is arranged in the upper notch 14, one end of the spring 13 is fixedly connected with the outer ring wall of the bearing 12, and the other end of the spring 13 is fixedly connected with the inner wall of the upper notch 14.

It should be noted that, the lower end of the casing 8 is connected with a steering structure 5 (as shown in fig. 8) for adjusting the use angle of the casing 8, the steering structure 5 includes a fixed casing 51, the fixed casing 51 is sleeved outside the lower end of the casing 8, the fixed casing 51 is hinged to the casing 8 through a lower hinge shaft 53, a rotating groove 52 is formed in the fixed casing 51, a threaded rod 54 is fixedly connected to the outer wall of the lower end of the casing 8, the threaded rod 54 is slidably disposed in the rotating groove 52, a threaded barrel 55 is connected to the external thread of the threaded rod 54, a holding rod 56 is fixedly connected to the lower end of the fixed casing 51, a roller assembly (as shown in fig. 9 and 10) is mounted at an end corner of the casing 8, the roller assembly includes a lower roller 71, a middle roller 72 and an upper roller 73, the lower roller 71 and the upper roller 73 are both rotatably connected to the inner wall of the casing 8, a one-way motor 9 is fixedly mounted on the outer wall of the casing 8, and an output shaft of the one-way motor 9 passes through the center of the circle of the casing 8 and the lower roller 71 and is fixedly connected.

It is worth understanding that the roller assembly is connected with a chain mechanism 4 (as shown in fig. 11) for cutting branches in a transmission manner, the chain mechanism 4 includes an inner side of the belt 44 and a lower roller 71, a middle roller 72, an upper roller 73, which are tightly fitted and rotated, an arc-shaped large tooth 46 is fixedly arranged on an outer side of the belt 44, and a small tooth 47 is fixedly arranged on a concave side of the arc-shaped large tooth 46.

It should be noted that, the tightening wheel mechanism 1 is provided with a scissors mechanism 2 (as shown in fig. 4 and 5) for shearing a hard branch, the scissors mechanism 2 includes a wheel disc 22 and two long connecting rods 23 and two short connecting rods 27 which are symmetrical in position, a hole slot for passing through the motor shaft 21 is provided at the center of a circle of the middle roller 72, one end of the motor shaft 21 passes through the hole slot and is fixedly connected with the center of a circle of the upper wheel disc 22 of the scissors mechanism 2, an upper slider 24 is fixedly connected to the outer wall of one side of the wheel disc 22 deviating from the center of a circle, a notch is provided at one end of the long connecting rod 23, the upper slider 24 is located in the notch, one end of the long connecting rod 23 is fixedly connected with a left cutter head 26, a lower slider 29 is fixedly connected to the outer wall of the other side of the wheel disc 22 deviating from the center of a circle, a notch is also provided at one end of the short connecting rod 27, the lower slider 29 is located in the notch of the short connecting rod 27, the other end of the short connecting rod 27 is fixedly connected with a right cutter head 28, the long connecting rod 23 is hinged to the short connecting rod 27 through an upper hinge shaft 25, and the left cutter head 26 is attached to the right cutter head 28.

It is worth noticing that, be provided with on the casing 8 and be used for cooperating scissors mechanism 2 to carry out the auxiliary device that shears harder branch, auxiliary device is including being used for hooking the branch to scissors mechanism 2 and carry out the rotatory claw mechanism 6 of shearing (as shown in fig. 9, 10, 11), rotatory claw mechanism 6 includes brace table 61, brace table 61 fixed connection is on casing 8, fixed mounting has vertical motor 62 on the outer wall of brace table 61, the output shaft end fixedly connected with circular chassis of vertical motor 62, fixedly connected with motor box 63 on the chassis, the circular slot has been seted up on two lateral walls of motor box 63 respectively, fixed mounting has horizontal motor 64 on one side inner wall of motor box 63, the output of horizontal motor 64 is connected with horizontal axis 65, both ends of horizontal axis 65 pass both sides circular slot respectively, the intermediate position vertical fixation of horizontal axis 65 has rocking rod 66, the other end fixedly connected with claw 67 of rocking rod 66.

A walnut tree pruning method comprises the following steps:

the method comprises the following steps: adjusting the use angle of the shell 8, wherein initially, the threaded cylinder 55 is in a locked state, one hand holds the holding rod 56, the other hand rotates the threaded cylinder 55 along the reverse thread direction, the threaded cylinder 55 moves along the threaded rod 54 away from the fixed shell 51, so that the threaded cylinder 55 is in a non-locked state, the threaded cylinder 55 can slide to drive the threaded rod 54 to move along the groove direction of the rotary groove 52, the threaded rod 54 drives the shell 8 to rotate along the lower hinge shaft 53 as an axis, so as to adjust the proper position, after the adjustment is finished, the threaded cylinder 55 is rotated along the thread direction, so that the threaded cylinder 55 moves along the threaded rod 54 close to the fixed shell 51, when the lower surface of the threaded cylinder 55 is tightly attached to the upper surface of the fixed shell 51, the threaded cylinder 55 is fixed, the threaded rod 54 is fixed, the shell 8 is driven to be fixed in position, and the angle adjustment is finished at this time;

step two: when a softer tree branch is cut, the one-way motor 9 is started, the one-way motor 9 drives the lower roller 71 to rotate through the output shaft, so that the belt 44 which is tightly driven by the lower roller 71 is driven to rotate, the belt 44 rotates to drive the large teeth 46 to move along the direction of the cutting edge, and when the cutting edge contacts with the tree branch, the cutting can be started;

step four: the vertical motor 62 is started, so that the motor box 63 is driven by the output shaft of the vertical motor 62 to rotate along the output shaft of the vertical motor 62 as an axis, the angles of the swing rod 66 and the hook claws 67 are adjusted, the hook claws 67 rotate on a plane parallel to the shell 8, so that branches can be hooked better, when the hook claws 67 on two sides hook one branch, the vertical motor 62 is closed, the horizontal motors 64 on two sides are started, the rotation directions of the horizontal motors 64 on two sides are opposite, the horizontal shaft 65 of the horizontal motor 64 rotates, the swing rod 66 is driven to rotate by taking the horizontal shaft 65 as an axis, so that the hook claws 67 on two sides respectively rotate towards the direction far away from the belt 44 by taking the horizontal shaft 65 as an axis, and the branches are pulled by the hook claws 67 to be close to the belt 44;

step five: when a tree branch is attached to the belt 44 and the outer side of the belt 44 is extruded under the driving of the pulling force of the hook claw 67, the belt 44 is bent inwards, two large teeth 46 bent inwards are bent inwards around a bending point, so that the tree branch is clamped, and the small teeth 47 on the inner side of the large teeth 46 clamp the tree branch along with the movement of the large teeth 46;

step six: one end of the belt 44 is deformed due to the pulling of tree branches, so that the other end of the belt 44, which is far away from the bending point, is pulled inwards, the middle roller 72 is pulled to move in the direction close to the bending point of the belt 44 along the direction of the upper notch 14, the middle roller 72 drives the motor shaft 21 and the bearing 12 to move in the same direction and extrude the spring 13, and meanwhile, the motor shaft 21 drives the scissor mechanism 2 to move along the direction of the upper notch 14, so that the purpose of feeding is achieved, when tree branches are clamped, the scissor mechanism 2 achieves feeding and shearing, and therefore shearing work is started;

step seven: when the cutting work is finished, the branches are cut by the scissor mechanisms 2, the belts 44 lose the pressure of the branches on the belts 44, and the belts 44 are restored under the reset action of the springs 13, so that the scissor mechanisms 2 are reset, the forward and reverse rotating motor 11 is turned off, and the cutting work is finished.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a walnut pruning device, includes that both ends are hollow structure's casing (8) and slidable mounting tighten wheel mechanism (1) on casing (8) from top to bottom, its characterized in that: the lower end of the shell (8) is connected with a steering structure (5) for adjusting the use angle of the shell (8), the end corner of the shell (8) is provided with a roller assembly, the roller assembly is in transmission connection with a chain mechanism (4) for cutting branches, the tightening wheel mechanism (1) is provided with a scissors mechanism (2) for cutting the harder branches, and the shell (8) is provided with an auxiliary device for matching the scissors mechanism (2) to cut the harder branches;

the auxiliary device is including being used for driving link mechanism (3) that scissors mechanism (2) are close to the branch and cut the branch, link mechanism (3) are including reset spring (37), outer slide bar (31), interior slide bar (34) and dead lever (36), set up straight spout (32) and a curved spout (35) on the outer wall of casing (8), the one end and straight spout (32) sliding connection of outer slide bar (31), the other end rotation of outer slide bar (31) is connected with the one end of pull rod (33), the other end rotation of pull rod (33) is connected with handle (10), the one end and the curved spout (35) sliding connection of interior slide bar (34), parallel arrangement connecting rod (38) between pull rod (33) and casing (8), the one end of connecting rod (38) is articulated with outer slide bar (31) and interior slide bar (34) respectively, the inner wall fixed connection of dead lever (36) and casing (8), the one end and dead lever (36) fixed connection of reset spring (37), the other end and the outer slide bar (31) fixed connection of reset spring (37).

2. The walnut tree pruning device of claim 1, wherein: the roller assembly comprises a lower roller (71), a middle roller (72) and an upper roller (73), the lower roller (71) and the upper roller (73) are rotatably connected with the inner wall of the shell (8), a one-way motor (9) is fixedly mounted on the outer wall of the shell (8), and an output shaft of the one-way motor (9) penetrates through the shell (8) and is fixedly connected with the circle center of the lower roller (71);

the tightening wheel mechanism (1) comprises a forward and reverse rotating motor (11), an upper notch (14) is formed in the side wall of the shell (8), the output end of the forward and reverse rotating motor (11) is fixedly connected with a motor shaft (21), a bearing (12) is arranged between the forward and reverse rotating motor (11) and the middle roller (72), the outer ring wall of the bearing (12) is in sliding connection with the upper notch (14), one side surface of the bearing (12) is rotationally connected with the forward and reverse rotating motor (11), the other side surface of the bearing (12) is rotationally connected with the middle roller (72), a spring (13) is arranged in the upper notch (14), one end of the spring (13) is fixedly connected with the outer ring wall of the bearing (12), and the other end of the spring (13) is fixedly connected with the inner wall of the upper notch (14);

the scissors mechanism (2) comprises a wheel disc (22), two long connecting rods (23) and a short connecting rod (27) which are symmetrical in position, a hole groove for a motor shaft (21) to penetrate through is formed in the center of a circle of a middle roller (72), one end of the motor shaft (21) penetrates through the hole groove to be fixedly connected with the center of the circle of an upper wheel disc (22) of the scissors mechanism (2), an upper sliding block (24) is fixedly connected to the outer wall of one side, deviating from the center of the circle, of the wheel disc (22), a notch is formed in one end of each long connecting rod (23), the upper sliding block (24) is located in the notch, one end of each long connecting rod (23) is fixedly connected with a left cutter head (26), a lower sliding block (29) is fixedly connected to the outer wall of the other side, deviating from the center of the circle, of the wheel disc (22), a notch is also formed in one end of each short connecting rod (27), the lower sliding block (29) is located in the notch of each short connecting rod (27), the other end of each short connecting rod (27) is fixedly connected with a right cutter head (28), the long connecting rod (23) is hinged to the short connecting rod (27) through an upper hinge shaft (25), and the left cutter head (26) is attached to the right cutter head (28);

the steering structure (5) comprises a fixed shell (51), the fixed shell (51) is sleeved outside the lower end of the shell (8), the fixed shell (51) is hinged to the shell (8) through a lower hinge shaft (53), a rotary groove (52) is formed in the fixed shell (51), a threaded rod (54) is fixedly connected to the outer wall of the lower end of the shell (8), the threaded rod (54) is arranged in the rotary groove (52) in a sliding mode, a threaded cylinder (55) is connected to the outer thread of the threaded rod (54), and a hand-held rod (56) is fixedly connected to the lower end of the fixed shell (51);

chain mechanism (4) are including pull handle (41), well articulated shaft (42) and belt (44), the one end of connecting rod (38) articulates on well articulated shaft (42), the one end and well articulated shaft (42) of pull handle (41) rotate and are connected, the other end fixedly connected with spliced pole (43) of pull handle (41), belt (44) closure is encircleed on lower gyro wheel (71), well gyro wheel (72) and last gyro wheel (73), two belt grooves (45) have been seted up on the both sides outer wall of belt (44), spliced pole (43) slip joint is in belt groove (45), the outer fixed surface of belt (44) is connected with a plurality of arc toothings (46), the fixed a plurality of toothings (47) that are provided with on the intrados face of toothings (46).

3. The utility model provides a walnut pruning device, includes that both ends are hollow structure's casing (8) and slidable mounting tighten wheel mechanism (1) on casing (8) from top to bottom, its characterized in that: the lower end of the shell (8) is connected with a steering structure (5) for adjusting the use angle of the shell (8), the end corner of the shell (8) is provided with a roller assembly, the roller assembly is in transmission connection with a chain mechanism (4) for cutting branches, the tightening wheel mechanism (1) is provided with a scissors mechanism (2) for cutting the harder branches, and the shell (8) is provided with an auxiliary device for matching the scissors mechanism (2) to cut the harder branches;

auxiliary device is including being used for carrying out rotatory claw mechanism (6) of shearing with the branch hook to scissors mechanism (2), rotatory claw mechanism (6) are including brace table (61), brace table (61) fixed connection is on casing (8), fixed mounting has vertical motor (62) on the outer wall of brace table (61), the output shaft end fixedly connected with circular chassis of vertical motor (62), fixedly connected with motor box (63) on the chassis, the circular slot has been seted up on two lateral walls of motor box (63) respectively, fixed mounting has horizontal motor (64) on one side inner wall of motor box (63), the output of horizontal motor (64) is connected with horizontal axis (65), the both ends of horizontal axis (65) pass both sides circular slot respectively, the intermediate position vertical fixation of horizontal axis (65) has rocking rod (66), the other end fixedly connected with claw (67) of rocking rod (66).

4. The walnut tree pruning device of claim 3, wherein: the roller assembly comprises a lower roller (71), a middle roller (72) and an upper roller (73), the lower roller (71) and the upper roller (73) are both rotatably connected with the inner wall of the shell (8), a one-way motor (9) is fixedly mounted on the outer wall of the shell (8), and an output shaft of the one-way motor (9) penetrates through the shell (8) and is fixedly connected with the circle center of the lower roller (71);

the scissors mechanism (2) comprises a wheel disc (22), two long connecting rods (23) and two short connecting rods (27) which are symmetrical in position, a hole groove for a motor shaft (21) to pass through is formed in the center of a circle of the middle idler wheel (72), one end of the motor shaft (21) passes through the hole groove and is fixedly connected with the center of a circle of the upper wheel disc (22) of the scissors mechanism (2), an upper sliding block (24) is fixedly connected to the outer wall of one side, deviating from the center of the circle, of the wheel disc (22), a notch is formed in one end of the long connecting rod (23), the upper sliding block (24) is located in the notch, one end of the long connecting rod (23) is fixedly connected with a left cutter head (26), a lower sliding block (29) is fixedly connected to the outer wall of the other side, deviating from the center of the circle, of the wheel disc (22), a notch is also formed in one end of the short connecting rod (27), the lower sliding block (29) is located in the notch of the short connecting rod (27), the other end of the short connecting rod (27) is fixedly connected with a right cutter head (28), the long connecting rod (23) is hinged to the short connecting rod (27) through an upper hinge shaft (25), and the left cutter head (26) is attached to the right cutter head (28);

turn to structure (5) including set casing (51), set casing (51) cover is established at the lower extreme of casing (8) outside, set casing (51) are articulated through articulated shaft (53) down with casing (8), turn trough (52) have been seted up on set casing (51), fixedly connected with threaded rod (54) on the lower extreme outer wall of casing (8), threaded rod (54) slide to set up in turn trough (52), the outside threaded connection of threaded rod (54) has a thread section of thick bamboo (55), lower extreme fixedly connected with holding rod (56) of set casing (51).

5. A walnut tree pruning method, which adopts the walnut tree pruning device of claim 2, and is characterized by comprising the following steps:

the method comprises the following steps: adjusting the use angle of the shell (8), wherein the thread cylinder (55) is in a locking state initially, one hand holds the holding rod (56), the other hand rotates the thread cylinder (55) along the reverse thread direction, the thread cylinder (55) moves along the threaded rod (54) to a position far away from the fixed shell (51), so that the thread cylinder (55) is in a non-locking state, the thread cylinder (55) can slide to drive the threaded rod (54), the thread cylinder moves along the in-groove direction of the rotary groove (52), the threaded rod (54) drives the shell (8), the shell (8) rotates along the lower hinged shaft (53) as an axis, so that the proper position is adjusted, after the adjustment is completed, the thread cylinder (55) is rotated along the thread direction, so that the thread cylinder (55) moves close to the fixed shell (51) along the threaded rod (54), when the lower surface of the thread cylinder (55) is tightly attached to the upper surface of the fixed shell (51), the thread cylinder (55) is fixed, the threaded rod (54) is fixed, so that the shell (8) is driven to be fixed, and the angle adjustment is completed;

step two: cutting softer branches, turning on a one-way motor (9), driving a lower roller (71) to rotate by the one-way motor (9) through an output shaft, so as to drive a belt (44) which is tightly driven with the lower roller (71) to rotate, driving a large tooth (46) to move along the direction of a cutting edge by the rotation of the belt (44), and starting cutting when the cutting edge contacts with the branches;

step three: the positive and negative rotation motor (11) is turned on to cut the hard branches, the positive and negative rotation motor (11) drives the wheel disc (22) to rotate through the motor shaft (21), when the forward and reverse rotation motor (11) rotates forward, the wheel disc (22) rotates forward, the upper slide block (24) rotates clockwise along the motor shaft (21) as the center of a circle, thereby leading the upper slide block (24) to slide along the inner wall of the notch and pushing the long connecting rod (23) to rotate a certain angle along the upper hinge shaft (25) anticlockwise, thereby driving the left cutter head (26) to rotate, simultaneously, the lower slide block (29) rotates clockwise along the circle center of the motor shaft (21), so that the lower sliding block (29) slides along the inner wall of the notch of the short connecting rod (27), and pushes the short connecting rod (27) to rotate clockwise along the upper hinge shaft (25) for a certain angle, and the rotation angles of the long connecting rod (23) and the short connecting rod (27) are the same, thereby driving the right cutter head (28) to rotate, the long connecting rod (23) before rotating passes through a positive rotation period, so that the position coincides with the position of the short connecting rod (27) before rotation, and similarly, the short connecting rod (27) rotates through a positive rotation period, so that the position is superposed with the position of the long connecting rod (23) before rotation, and the same is true when the long connecting rod rotates reversely, after a period of positive and negative rotation, the positions of the long connecting rod (23) and the short connecting rod (27) are reset, the left cutter head (26) and the right cutter head (28) are mutually alternated, so that the purpose of cutting is achieved;

step four: firstly, a belt (44) is attached to a branch, so that the branch is positioned between two big teeth (46), the handle (10) is pulled downwards, the handle (10) drives the pull rod (33) to move downwards, the pull rod (33) drives the outer slide bar (31) to move towards the direction far away from the fixed rod (36) along the straight chute (32), thereby pulling the return spring (37), the outer slide bar (31) drives the connecting rod (38) to move downwards, the outer slide bar (31) drives the inner slide bar (34) to move in the bent slide groove (35) in the direction away from the fixed rod (36), so that the connecting rod (38) rotates around the center of the central shaft of the inner slide rod (34) and the connecting rod mechanism (3) on the other side moves symmetrically, and the middle articulated shaft (42) can be made to be along the notch direction of the upper notch (14) due to the movement of the two connecting rods (38), and moves in the direction close to the tightening wheel mechanism (1), the middle articulated shaft (42) drives the connecting column (43) to move along the same direction through the pull handle (41), the pull handle (41) pulls the belt (44) which is connected with the pull handle in a sliding way, so that the belt (44) is bent inwards under the driving of the pull handle (41), two large teeth (46) bent at the two sides are bent inwards by taking the bending point as the center of a circle, so as to clamp the branches, the small teeth (47) on the inner side of the big teeth (46) clamp the branches along with the movement of the big teeth (46);

step five: one end of the belt (44) is deformed due to the pulling of the pull handle (41), so that the other end, far away from a bending point, of the belt (44) is pulled inwards, the middle roller (72) is pulled to move in the direction close to the bending point of the belt (44) along the direction of the upper notch (14), the middle roller (72) drives the motor shaft (21) and the bearing (12) to move in the same direction and extrude the spring (13), meanwhile, the motor shaft (21) drives the scissor mechanism (2) to move in the direction of the upper notch (14), the purpose of feeding is achieved, when tree branches are clamped, the scissor mechanism (2) achieves feeding and shearing, and accordingly shearing work is started;

step six: when the shearing work is finished, the forward and reverse rotating motor (11) is closed, the scissors mechanism (2) stops working, the handle (10) is loosened, the outer sliding rod (31) resets under the pulling of the return spring (37), the connecting rod (38) resets, the connecting column (43) resets simultaneously, the belt (44) is restored, and the scissors mechanism (2) retracts.

6. A walnut tree pruning method, which adopts the walnut tree pruning device of claim 4, is characterized by comprising the following steps:

step three: the positive and negative rotation motor (11) is turned on to cut the harder branches, the positive and negative rotation motor (11) drives the reel (22) to rotate through the motor shaft (21), when the forward and reverse rotation motor (11) rotates forward, the wheel disc (22) rotates forward, the upper slide block (24) rotates clockwise along the motor shaft (21) as the center of a circle, thereby the upper sliding block (24) slides along the inner wall of the notch and pushes the long connecting rod (23) to rotate along the upper hinging shaft (25) in a certain angle anticlockwise, thereby driving the left cutter head (26) to rotate, simultaneously, the lower slide block (29) rotates clockwise along the circle center of the motor shaft (21), so that the lower slide block (29) slides along the inner wall of the notch of the short connecting rod (27), and pushes the short connecting rod (27) to rotate clockwise along the upper hinge shaft (25) for a certain angle, and the rotation angles of the long connecting rod (23) and the short connecting rod (27) are the same, thereby driving the right cutter head (28) to rotate, the long connecting rod (23) before rotating passes through a positive rotation period, so that the position coincides with the position of the short connecting rod (27) before rotation, and similarly, the short connecting rod (27) rotates through a positive rotation period, so that the position is superposed with the position of the long connecting rod (23) before rotation, and the same is true when the long connecting rod rotates reversely, after a period of positive and negative rotation, the positions of the long connecting rod (23) and the short connecting rod (27) are reset, the cutting purpose is achieved by the mutual alternation of the left cutter head (26) and the right cutter head (28);

step four: the vertical motor (62) is started, so that the motor box (63) is driven by an output shaft of the vertical motor (62) to rotate along the output shaft of the vertical motor (62) as an axis simultaneously, the angles of the swing rod (66) and the hook claws (67) are adjusted, the hook claws (67) rotate on a plane parallel to the shell (8), branches can be hooked better, when the hook claws (67) on two sides hook a branch, the vertical motor (62) is closed, the horizontal motors (64) on two sides are started, the turning directions of the horizontal motors (64) on two sides are opposite, the horizontal shaft (65) of the horizontal motor (64) rotates, the swing rod (66) is driven to rotate by taking the horizontal shaft (65) as the axis, the hook claws (67) on two sides respectively rotate towards the direction far away from the belt (44) by taking the horizontal shaft (65) as the axis, and the branch is pulled by the hook claws (67) to be close to the belt (44);

step five: when branches are attached to the belt (44) and the outer side of the belt (44) is extruded under the driving of the pulling force of the hook claw (67), the belt (44) is bent inwards, two large teeth (46) which are bent inwards by taking a bending point as a circle center, so that the branches are clamped, and small teeth (47) on the inner side of the large teeth (46) clamp the branches along with the movement of the large teeth (46);

step six: one end of the belt (44) is deformed due to the pulling of the pull handle (41), so that the other end, far away from a bending point, of the belt (44) is pulled inwards, the middle roller (72) is pulled to move in the direction close to the bending point of the belt (44) along the direction of the upper notch (14), the middle roller (72) drives the motor shaft (21) and the bearing (12) to move in the same direction and extrude the spring (13), meanwhile, the motor shaft (21) drives the scissor mechanism (2) to move in the direction of the upper notch (14), the purpose of feeding is achieved, when tree branches are clamped, the scissor mechanism (2) achieves feeding and shearing, and accordingly shearing work is started;

step seven: when the cutting work is finished, the branches are cut off by the scissors mechanism (2), the belt (44) loses the pressure of the branches on the belt (44), and the belt (44) is restored under the restoring action of the spring (13), so that the scissors mechanism (2) is restored, the forward and reverse rotating motor (11) is turned off, and the cutting work is finished.