阅读说明：本技术 一种适用于树木涂刷石灰水的装置及其工作方法 (Device suitable for tree painting lime water and working method thereof ) 是由 江洪 严传馨 蒋潇杰 于 2020-05-12 设计创作，主要内容包括：本发明公开林业机械领域中的一种适用于树木涂刷石灰水的装置及其工作方法,由手爪涂刷机构、曲柄滑块机构、驱动机构、搅拌机构组成,手爪涂刷机构主要对树干表面进行涂刷石灰水操作,曲柄滑块机构能够实现涂刷手爪的上下移动,驱动机构主要控制装置在涂刷之前小车位置的准确定位,搅拌机构主要控制石灰水的搅拌操作并将石灰水输送至手爪涂刷机构,利用电磁铁驱动上下空间交错的两组手爪链中的手爪合拢形成圆形面抱树干,相比于现有技术中喷涂的方式能有效减少石灰水用量,使石灰水涂抹更加均匀,适用于不同直径以及树干形状不规则的树木均匀涂刷石灰水,能节省石灰水的用量,涂刷过程都是电机驱动完成,提高了工作的效率。(The invention discloses a device suitable for brushing lime water on trees and a working method thereof in the field of forestry machinery, which consists of a paw brushing mechanism, a slider-crank mechanism, a driving mechanism and a stirring mechanism, wherein the paw brushing mechanism is mainly used for brushing lime water on the surface of a tree trunk, the slider-crank mechanism can realize the up-and-down movement of a brushing paw, the driving mechanism is mainly used for controlling the accurate positioning of the position of a trolley before brushing, the stirring mechanism is mainly used for controlling the stirring operation of the lime water and conveying the lime water to the paw brushing mechanism, and electromagnets are used for driving the paws in two groups of paw chains which are staggered up and down to be closed to form a round surface to hold the tree trunk, the lime water consumption can be saved, the coating process is completed by the motor driving, and the working efficiency is improved.)

1. The utility model provides a device suitable for trees are brushed with lime wash, includes that the U-shaped board of front portion and the minor axis fixed connection of back part constitute integrative hand claw base (20), characterized by: the rear end of the short shaft is connected to the front end of the sliding block (1 a) through a bearing (20 a), the front end of the sliding block (1 a) is also fixedly connected with the rear ends of two paw torsion reset springs (19) which are symmetrically arranged left and right, and the front ends of the two paw torsion reset springs (19) are fixedly connected to the U-shaped plate; a brushing bottom (27) and two groups of paw chains are arranged in front of the paw base (20), the brushing bottom (27) is horizontally arranged and fixedly connected to the bottom of the U-shaped plate, and the front end of the brushing bottom (27) is an arc surface; the structure of two groups of paw chains is completely the same, but one is arranged on the left and the other is arranged on the right, each group of paw chains can enclose a hollow semi-cylinder, each group of paw chains is formed by connecting four sections of paws in series, the innermost side of each section of paw is a semi-cylindrical painting body (22 g), the outer sides of the two sections of paws connected in series are respectively connected through a vertical shaft pin (21 j), each shaft pin (21 j) is sleeved with a torsion spring (21 i), and an electromagnet (21 h) is arranged at the inner side of each shaft pin (21 j) and close to the inner side edge of the paw; the rear end of the sliding block (1 a) is connected with the guide rail (1) in a sliding manner through a vertical sliding rail arranged on the guide rail (1), the rear end of the sliding block (1 a) is also connected with the front end of the connecting rod (2) through a shaft pin (1 b), the rear end of the connecting rod (2) is connected onto the wheel surface of the eccentric wheel (3) through a pin (3 a), the central shaft of the eccentric wheel (3) is horizontally arranged from front to back and is coaxially and fixedly connected with the output shaft of a first motor (5), the shell of the first motor (5) is fixedly arranged on a fixed frame (4), a base sliding plate (6) is fixedly connected with the guide rail (1) and the fixed frame (4) which are vertically arranged from top to bottom, and the bottom of the base sliding plate (6) is connected with the sliding rail on the upper surface of the; the front and back horizontal screw rods (7) are connected between the trolley base (14) and the base sliding plate (6), and one end of each screw rod (7) is coaxially and fixedly connected with an output shaft of a third motor (18); a stirring barrel (10) which is horizontally arranged from left to right is arranged behind the base sliding plate (6), a circle of groove is arranged on the outer wall of one end of the stirring barrel (10), a second gear (9) is fixedly sleeved on the outer wall of the other end of the stirring barrel, two first gears (8) which are symmetrically arranged from front to back relative to the second gear (9) and are respectively meshed with the second gear (9) are arranged below the second gear (9), two auxiliary wheels (13) which are symmetrically arranged from front to back relative to the groove and are in rolling fit with the groove with a gap are arranged below the circle of groove of the stirring barrel (10), a force transmission shaft (30) is coaxially connected between the auxiliary wheel (13) and the first gear (8) on the same side, and one force transmission shaft (30) is coaxially connected with a second motor (12); the outlet of the stirring barrel (10) is connected with the inlet of the pump (17) through one section of conveying pipeline (16), and the outlet of the pump (17) is connected with the brushing body (22 g) through the other section of conveying pipeline (16).

2. The device for painting lime water on trees as claimed in claim 1, wherein: each section of paw in each group of paw chains consists of a paw frame (22 k), an outer pipeline (22 a), a first spraying pipeline (22 b), a second spraying pipeline (22 c), a pressure sensor (22 d), a return spring (22 e), a brushing base (22 f) and a brushing body (22 g), wherein the paw frame (22 k) is a horizontally arranged trapezoid frame, the outer side edge of the paw frame is longer, the inner side edge of the paw frame is shorter, the outer pipeline (22 a) is fixedly connected on the outer side edge of the paw frame (22 k), the brushing base (22 f) and the brushing body (22 g) are arranged beside the inner side of the paw frame (22 k), a pressure sensor (22 d) is fixedly connected in the middle of the outer side edge of the paw frame (22 k), one end of the return spring (22 e) is fixedly connected on the surface of the pressure sensor (22 d), and the other end of the return spring (22 e) penetrates through a central through hole in the inner side edge of the paw frame (22 k) and then is fixedly connected with the brushing base (22 f), two first spraying pipelines (22 b) which are parallel to the return spring (22 e) and are symmetrically arranged relative to the return spring (22 e) are arranged on two sides of the return spring (22 e), the outer end of each first spraying pipeline (22 b) is fixedly connected with the outer side of the paw frame (22 k), the inner end of each first spraying pipeline (22 b) penetrates through a through hole in the inner side of the paw frame (22 k) in an interference fit mode, a second spraying pipeline (22 c) is coaxially sleeved in an inner cavity of each first spraying pipeline (22 b) at intervals, the inner end of each second spraying pipeline (22 c) is fixedly connected with a brushing base (22 f), a horizontal groove is formed in the inner side face of each brushing base (22 f), a horizontal semi-cylindrical brushing body (22 g) is fixedly connected to the groove, and the cylindrical face of the brushing body (22 g) faces towards the inner side.

3. The working method of the device for painting lime water on trees as claimed in claim 1 is characterized by comprising the following steps:

step A: the initial state is that the electromagnet (21 h) is not electrified, the two groups of paw chains are in an open state, the third motor (18) is started, the screw rod (7) rotates, and the base sliding plate (6) moves to enable the trunk to enter between the two groups of paw chains and to be in contact with the arc surface at the front end of the brushing bottom (27); the electromagnet (21 h) works to attract the claws to rotate towards the direction of embracing the trunk, so that the two groups of claw chains embrace the trunk, and the brushing body (22 g) is in contact with the trunk;

and B: lime water is put into the stirring barrel (10), the second motor (12) is started, the stirring barrel (10) rotates to stir the lime water, the pump (17) is started after the lime water is uniformly stirred, and the lime water is conveyed into the brushing body (21 g) from the stirring barrel (10);

and C: the first motor (5) is started, and the sliding block (1 a) moves upwards in the guide rail (1) to realize the brushing operation of the brushing body (21 g) on the trunk.

4. The method of operation of claim 3, wherein: step A: when the electromagnet (21 h) works, the electromagnet (21 h) on the first section of the paw is electrified, the second section of the paw is attracted by magnetic force to rotate in the direction of encircling the trunk, the painting body (22 g) on the second section of the paw is extruded by the trunk to move back, when the painting body (22 g) reaches a preset pressure value, the electromagnet (21 h) keeps the magnetic force, the electromagnet (21 h) in the second section of the paw is electrified, the electromagnet (21 h) on each section of the paw on the two groups of paw chains is electrified in sequence, the painting body (22 g) on each section of the paw chain is attached to the trunk, and the two groups of paw chains are attached to the trunk with different diameters tightly.

5. The method of operation of claim 3, wherein: in the step C, after the upward brushing is finished, the pump (17) is powered off, the first motor (5) is stopped, all the electromagnets (21 h) are powered off, and under the action of the torque of the torsion spring (21 i), the two groups of paw chains are restored to an open state from a state of encircling the trunk; then, the first motor (5) is electrified, the sliding block (1 a) moves downwards to the bottom of the trunk along the sliding rail (1), the first motor (5) is powered off, and one brushing operation is finished.

6. The method of operation of claim 3, wherein: in the step C, in the upward brushing process of the brushing body (21 g), when encountering an irregular trunk with a distorted shape, the paw base (20) rotates through the bearing (20 a) to drive the paw torsion return spring (19) to deform.

Technical Field

The invention relates to the technical field of forestry machinery, in particular to a lime wash painting device suitable for trees, which paints a layer of lime wash on the surface of a tree to ensure that the tree can safely pass the winter.

Background

When winter comes, the surface of the tree is coated with lime with the height of about one meter, and the tree is coated with lime in winter, so that the tree has a great effect: one is that the insect killing and sterilization can ensure the tree to safely pass winter and reduce the plant diseases and insect pests in spring in the next year, insects like to lay eggs in the gaps of the old bark in the early winter, and the insects can be killed by brushing lime water; secondly, pests in the soil are prevented from climbing along the trunk of the tree, and the pests do not like white in dark and dirty places, and the trees are prevented from being damaged by the pests climbing along the trunk by coating lime on the trees; and thirdly, the tree can be prevented from freezing, the heat preservation effect is achieved, the temperature is very low at night in winter, but in daytime, as the temperature rises, the bark of the tree is dark brown, the light and the heat are easily absorbed, the temperature can rise very fast, and the tree can be easily frozen and cracked due to the large temperature difference. The lime water is coated, and because the lime water is white, 40 to 70 percent of sunlight can be reflected, so that the temperature difference of the tree at night is reduced, and the tree cannot crack easily. At present, lime water is generally manually stirred to tree, and the tree is brushed by using a brush, so that the efficiency is low, and lime can also cause damage to a human body, and therefore mechanization of brushing lime water is a problem to be solved urgently.

At present, there are some designs related to mechanical brushing of trees, for example, a tree lime brushing device for garden planting proposed in the document with chinese patent application No. 201710798747.X, which uses two symmetrically arranged arc-shaped splint devices, and the inner side of the device is designed with soft hair to brush trees, but the brushing device cannot brush tree trunks with different thicknesses, and cannot brush the tree roots, so the use is very inconvenient. As another example, a tree brushing device for conveniently spraying lime water is proposed in chinese patent application No. 201710980655.3, which pumps lime water from a water storage tank to a spraying mechanism through a water pump, adjusts the flow rate through an adjustment valve to spray a tree trunk, and controls the movement of the spraying mechanism through a lifting mechanism and a reciprocating swing mechanism.

Disclosure of Invention

The invention provides a device suitable for brushing lime water on trees and a working method thereof aiming at the problems in the prior art, the device can adjust a brushing paw to adapt to trees with different thicknesses or irregular trunks, and the lime water can be saved by adopting a brushing mode and uniformly brushed on the surface of a bark.

The technical scheme adopted by the device for brushing lime water on trees is as follows: the hand claw base is formed by fixedly connecting a U-shaped plate at the front part and a short shaft at the rear part into a whole, the rear end of the short shaft is connected to the front end of a sliding block through a bearing, the front end of the sliding block is also fixedly connected with the rear ends of two hand claw torsion reset springs which are symmetrically arranged left and right, and the front ends of the two hand claw torsion reset springs are fixedly connected to the U-shaped plate; a brushing bottom and two groups of paw chains are arranged in front of the paw base, the brushing bottom is horizontally arranged and fixedly connected to the bottom of the U-shaped plate, and the front end of the brushing bottom is an arc surface; the structure of two groups of paw chains is completely the same, but one is arranged on the left and the other is arranged on the right, each group of paw chains can enclose a hollow semi-cylinder, each group of paw chains is formed by connecting four paws in series, the innermost side of each paw is a semi-cylindrical painting body, the outer sides of the two serially connected paws are connected through a vertical shaft pin, each shaft pin is sleeved with a torsion spring, and an electromagnet is arranged at the position close to the inner side of each paw and in the inner side direction of each shaft pin; the rear end of the sliding block is connected with the guide rail in a sliding manner through a vertical sliding rail arranged on the guide rail, the rear end of the sliding block is also connected with the front end of a connecting rod through a shaft pin, the rear end of the connecting rod is connected to the wheel surface of an eccentric wheel through a pin, the central shaft of the eccentric wheel is horizontally arranged in the front and back direction and is fixedly connected with the output shaft of a first motor coaxially and concentrically, the shell of the first motor is fixedly arranged on a fixed frame, the base sliding plate is fixedly connected with the vertical sliding rail and the fixed frame, and the bottom of the base sliding plate is connected with the sliding rail on the; the front and rear horizontal screw rods are connected between the trolley base and the base sliding plate, and one end of the screw rod is fixedly connected with an output shaft of a third motor coaxially; a stirring barrel which is horizontally arranged from left to right is arranged behind the base sliding plate, a circle of groove is arranged on the outer wall of one end of the stirring barrel, a second gear is fixedly sleeved on the outer wall of the other end of the stirring barrel, two first gears which are symmetrically arranged front and back relative to the second gear and are both meshed with the second gear are arranged below the second gear, two auxiliary wheels which are symmetrically arranged front and back relative to the groove and are in rolling fit with the groove with a gap are arranged below the circle of groove of the stirring barrel, a force transmission shaft is coaxially and concentrically connected between the auxiliary wheel and the first gear on the same side, and one of the force transmission shafts is coaxially and concentrically connected with a second motor; the outlet of the stirring barrel is connected with the inlet of the pump through one section of conveying pipeline, and the outlet of the pump is connected with the brushing body through the other section of conveying pipeline.

The technical scheme of the working method of the device suitable for brushing lime water on trees comprises the following steps:

step A: the initial state is that the electromagnet is not electrified, the two groups of gripper chains are in an open state, the third motor is started, the screw rod rotates, and the base sliding plate moves to enable the trunk to enter between the two groups of gripper chains and to be in contact with the arc surface at the front end of the brushing bottom; the electromagnet works to attract the claws to rotate towards the direction of embracing the trunk, so that the two groups of claw chains are encircled by the trunk, and the painting body is contacted with the trunk;

and B: putting lime water into the stirring barrel, starting the second motor, stirring the lime water by the rotation of the stirring barrel, starting the pump after uniform stirring, and conveying the lime water from the stirring barrel to the interior of the brushing body;

and C: and starting the first motor, and enabling the sliding block to move upwards in the guide rail so as to realize the brushing operation of the brushing body on the trunk.

Further, step a: when the electromagnet works, the electromagnet on the first section of claw is electrified firstly, the second section of claw is attracted by magnetic force to rotate in the direction of encircling the trunk, the painting body on the second section of claw is extruded by the trunk and moves back, the electromagnet keeps the magnetic force when the painting body reaches a preset pressure value, then the electromagnet in the second section of claw is electrified, the electromagnet on each section of claw on the two groups of claw chains is electrified in sequence, and the painting body on each section of claw is attached to the trunk, so that the two groups of claw chains are closely attached to the trunks with different diameters.

Further: in the step C, after the upward brushing is finished, the pump is powered off, the first motor is stopped, all the electromagnets are powered off, and the two groups of paw chains are restored to the open state from the state of encircling the trunk under the action of the torque of the torsion spring; then the first motor is electrified, the sliding block moves downwards to the bottom of the trunk along the sliding rail, the first motor is powered off, and one-time painting operation is finished.

The invention adopts the technical scheme to show the following beneficial effects:

1. the invention utilizes the electromagnet to drive the claws of the two groups of claw chains which are staggered up and down to fold to form a round surface to hold the tree trunk, realizes mechanization in the brushing process, solves the problem that manual brushing is needed when the trees are brushed with lime water under the prior art, can improve the working environment of workers to a great extent, and simultaneously adopts the brushing mode to effectively reduce the using amount of the lime water compared with the spraying mode in the prior art, so that the lime water can be more uniformly smeared.

2. The slider-crank mechanism can realize the up-and-down movement of the painting claw and the effect of painting to the bottom of the trunk, and meanwhile, the slider-crank mechanism has the quick return characteristic, so that the return time can be saved, the painting efficiency is further improved, the problem of low efficiency in painting lime water on trees in the prior art is solved, and the painting ring efficiency can be greatly improved.

3. The lime water brush can be suitable for uniformly brushing lime water on trees with different diameters and irregular trunk shapes, the using amount of the lime water can be saved, the brushing process is completed by the driving of the motor, the damage of lime under manual operation to a human body is avoided, the physical strength of workers is saved, the working efficiency is improved, and the lime water brush is easy to realize and popularize.

Drawings

FIG. 1 is a schematic axial side view of a lime wash apparatus for painting trees according to the present invention;

FIG. 2 is an enlarged, partially exploded view of the paw brushing mechanism of FIG. 1;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is an exploded view of the single finger of FIG. 2;

FIG. 5 is an exploded, enlarged view of the crank-slider mechanism of FIG. 1;

FIG. 6 is an exploded, enlarged view of the drive mechanism of FIG. 1;

FIG. 7 is an exploded, enlarged view of the agitation mechanism of FIG. 1 rotated 90 degrees clockwise relative to FIG. 1;

FIG. 8 is a schematic view of the device of the present invention in its initial state after approaching a tree;

FIG. 9 is a schematic view of the device of the present invention in a closed state surrounding a tree.

In the figure: 1. a guide rail; 1a, a sliding block; 1b, a shaft pin; 2. a connecting rod; 3. an eccentric wheel; 3a, a pin; 4. a fixed mount; 5. a first motor; 6. a base slide plate; 7. a screw rod; 8. a first gear; 9. 10, a second gear, a stirring barrel; 11. a handlebar; 12. a second motor; 13. an auxiliary wheel; 14. a trolley base; 15. a drive wheel; 16. a delivery conduit; 17. a pump; 18. a third motor; 19. a paw torsion return spring; 20. a paw base; 20a, a bearing; 21. a first section of gripper; 21i, a torsion spring; 21j, an axle pin; 21h, an electromagnet; 22. a second section of gripper; 22a, an outer pipe; 22b, a first spray pipe; 22c, a second spray pipe; 22d, a pressure sensor; 22e, a return spring; 22f, brushing the base; 22g of a brushing body; 22k, a second section of gripper frame; 23. a third section of gripper; 24. a fourth section of paw; 25. a coupling; 26. cushion blocks; 27. coating the bottom; 28. a support frame; 29. a tree trunk; 30. a force transmission shaft; 31. and supporting the shaft block.

Detailed Description

For the sake of understanding, the invention is now specified in terms of a spatial orientation suitable for a tree-painting lime water installation: the position of a first section of paw 21 in figure 1 is defined as front, and the position of a trolley base 14 is defined as rear; the eccentric wheel 3 is positioned as 'up' in fig. 1, and the driving wheel 15 is positioned as 'down'; the position of the pump 17 in fig. 1 is defined as "left" and the position of the eccentric 3 is defined as "right". The position of the outer pipe 22a in fig. 3 is defined as "outer" and the position of the brush body 22g is defined as "inner".

As shown in figure 1, the device of the invention consists of a paw brushing mechanism, a slider-crank mechanism, a driving mechanism and a stirring mechanism, wherein the paw brushing mechanism is positioned at the forefront of the device, and the slider-crank mechanism is positioned at the rear of the paw brushing mechanism and is connected with the rear end of the paw brushing mechanism. The driving mechanism is positioned at the rear part of the slider-crank mechanism and is connected with the slider-crank mechanism, and the stirring mechanism is arranged at the rear upper part of the driving mechanism and is connected with the paw brushing mechanism through a pipeline.

Referring to fig. 1 and 2, the paw brushing mechanism is mainly used for brushing lime water on the surface of a trunk. The paw painting mechanism comprises a paw base 20, a return spring 19, a sliding block 1a, a painting bottom 27, two groups of paw chains and the like. The paw base 20 is formed by fixedly connecting a U-shaped plate at the front part and a short shaft at the rear part into a whole, the front end of the short shaft is fixedly connected to the middle of the U-shaped plate, and the rear end of the short shaft is connected to the front end of the sliding block 1a through a bearing 20 a. The front end of the sliding block 1a is also fixedly connected with the rear ends of two paw torsion return springs 19, and the front ends of the two paw torsion return springs 19 are fixedly connected with a U-shaped plate at the front part of the paw base 20. The two paw torsion return springs 19 are arranged in bilateral symmetry with respect to the paw base 20 and the slide 1 a. The upper surface of the paw base 20 is kept horizontal, a brushing bottom 27 and two groups of paw chains are arranged in front of the paw base 20, the brushing bottom 27 is horizontally arranged and fixedly connected to the bottom of the U-shaped plate through a bolt, and the front end of the brushing bottom 27 is an arc surface. The two sets of paw chains have the same structure, but are arranged one on the left, one on the right, one on the top and one on the bottom, and staggered in the top and bottom spaces. Each group of paw chains can be enclosed into a hollow semi-cylinder, and the two hollow semi-cylinders enclosed by the two groups of paw chains can encircle the tree trunk one above the other. Each group of paw chain is formed by connecting four sections of paws in series, and taking one group of paw chain as an example, the group of paw chain is formed by a first section of paw 21, a second section of paw 22, a third section of paw 23 and a fourth section of paw 24. Referring to fig. 3, the first gripper 21 and the gripper base 20, and the two grippers connected in series are connected by a vertical shaft pin 21j, that is, the second gripper 22 and the first gripper 21, the third gripper 23 and the second gripper 22, and the fourth gripper 24 and the third gripper 23 are connected by a shaft pin 21j, and each shaft pin 21j is sleeved with a torsion spring 21i, so that under the action of the torsion springs 21i and the shaft pins 21j, the first gripper 21 and the gripper base 20, and the two grippers connected in series can be twisted along the center of the shaft pin 21 j.

Referring to fig. 4, each of the two sections of the paw is identical in structure, and taking the second section of the paw 22 shown in fig. 4 as an example, each of the two sections of the paw is composed of a paw frame 22k, an outer pipe 22a, a first spraying pipe 22b, a second spraying pipe 22c, a pressure sensor 22d, a return spring 22e, a brushing base 22f and a brushing body 22 g. The gripper frame 22k is a horizontally disposed trapezoidal frame, and has a longer outer side and a shorter inner side. The outer pipeline 22a is fixedly connected to the outer side edge of the paw frame 22k, the brushing base 22f and the brushing body 22g are arranged beside the inner side of the paw frame 22k, the pressure sensor 22d is fixedly connected to the right middle of the outer side edge of the paw frame 22k through a bolt, one end of a return spring 22e is fixedly connected to the surface of the pressure sensor 22d, the other end of the return spring 22e extends inwards and penetrates through a central through hole in the inner side edge of the paw frame 22k to be fixedly connected with the brushing base 22f, and therefore the return spring 22e is arranged in the inner and outer directions. Two first spraying pipelines 22b which are parallel to the return spring 22e and are symmetrically arranged relative to the return spring 22e are arranged on two sides of the return spring 22e, the outer end of each first spraying pipeline 22b is fixedly connected with the outer side edge of the paw frame 22k, and the inner end of each first spraying pipeline passes through the through hole on the inner side edge of the paw frame 22k and is in interference fit with the through hole. A second spraying pipe 22c is coaxially sleeved in the inner cavity of each first spraying pipe 22b, and the second spraying pipes are movably connected with each other in a clearance fit manner. The inner end of the second spraying pipe 22c is fixedly connected with the painting base 22 f. The brushing base 22f is of a block structure, a semi-cylindrical horizontal groove is formed in the inner side face of the brushing base, a horizontal semi-cylindrical brushing body 22g is fixedly connected to the groove, and the cylindrical surface of the semi-cylindrical brushing body 22g faces inwards and is used for brushing lime water on trees. Therefore, the painting body 22g is located at the innermost side of the entire paw.

The outer side of the paw frame 22k is connected with the lower section paw by the shaft pin 21j at the end close to the lower section paw, the paw frame 22k of each section paw is fixedly connected with an electromagnet 21h, and the electromagnet 21h is arranged on the inner side of the shaft pin 21j and close to the inner side of the paw frame 22k of each section paw. When the coil of the electromagnet 21h is energized to generate magnetic force, the next paw is attracted to rotate inward against the torsion of the torsion spring 21i on the shaft pin 21 j.

Referring to fig. 1 and 5, the slider-crank mechanism shown in fig. 5 mainly controls the up-and-down reciprocating movement of the whole painting claw mechanism, and mainly comprises a guide rail 1, a connecting rod 2, an eccentric wheel 3, a fixed frame 4, a first motor 5 and a base sliding plate 6. The base sliding plate 6 is horizontally arranged above the trolley base 14, the upper surface of the trolley base 14 is provided with sliding rails which are horizontally arranged from front to back, the bottom of the base sliding plate 6 is connected with the sliding rails arranged on the upper surface of the trolley base 14 in a sliding mode, and the base sliding plate 6 can move back and forth along the trolley base 14. The base sliding plate 6 is fixedly connected with a guide rail 1 and a fixed frame 4 which are vertically arranged up and down, and the fixed frame 4 is arranged behind the guide rail 1. The guide rail 1 is provided with a vertical slide rail which is connected with the rear end of a slide block 1a in the paw brushing mechanism in a sliding way, and the slide block 1a can move up and down along the guide rail 1. The rear end of the slide block 1a is also connected with the front end of a connecting rod 2 through a shaft pin 1b, and the rear end of the connecting rod 2 is connected with the wheel surface of the eccentric wheel 3 through a pin 3 a. The central shaft of the eccentric wheel 3 is horizontally arranged in front and back and is coaxially and fixedly connected with the output shaft of a first motor 5. The housing of the first motor 5 is fixedly mounted on the fixed frame 4 through bolts. When the slider-crank mechanism moves, the first motor 5 is started to drive the eccentric wheel 3 to rotate, the eccentric wheel 3 drives the connecting rod 2 to rotate through the shaft 3a, and the connecting rod 2 rotates to drive the slider 1a to move up and down in the guide rail 1 through the shaft pin 1.

Referring to fig. 1 and 6, the drive mechanism primarily controls the accurate positioning of the cart position prior to painting. The driving mechanism mainly comprises a trolley base 14, a driving wheel 15, a screw rod 7, a third motor 18, a coupler 25 and a trolley handle 11. The trolley base 14 is a horizontally arranged square, and four corners of the bottom of the trolley base are respectively provided with a driving wheel 15. An upward extending handlebar 11 is fixedly welded on the upper part of the rear end of the trolley base 14. The front and back horizontal screw rod 7 is connected between the trolley base 14 and the base sliding plate 6 through threads, and one end of the screw rod 7 is coaxially and fixedly connected with an output shaft of a third motor 18 through a coupler 25. The housing of the third motor 18 is fixedly connected to the trolley base 14 by bolts. The upper surface of the trolley base 14 is provided with two front and back horizontal guide rails which are connected with the base sliding plate 6 in a sliding manner, and when the third motor 18 works, the screw rod 7 is driven to rotate, and the base sliding plate 6 is driven to move back and forth along the trolley base 14.

Referring to fig. 1 and 7, the stirring mechanism shown in fig. 7 mainly controls the stirring operation of the lime water and delivers the lime water to the paw brushing mechanism. The device mainly comprises a stirring barrel 10, a second gear 9, a second motor 12, two first gears 8, two auxiliary wheels 13 and two force transmission shafts 30. Wherein, agitator 10 is at the rear of base slide 6, and the level is arranged about agitator 10, is equipped with the round recess on the one end outer wall of agitator 10, and fixed cover has second gear 9 on the other end outer wall. Below the second gear 9 are two first gears 8 arranged symmetrically in front and back with respect to the second gear 9, both first gears 8 meshing with the second gear 9. Below the groove of the stirring barrel 10, there are two auxiliary wheels 13 symmetrically arranged in front and back of the groove, and the auxiliary wheels 13 are in rolling fit with the groove with gaps. A force transmission shaft 30 is coaxially and commonly connected with an auxiliary wheel 13 and a first gear 8 on the same side, the end of the force transmission shaft 30 close to the auxiliary wheel 13 is supported on the upper end of a support frame 28 through a bearing 20a, and the lower end of the support frame 28 is fixedly connected with a trolley base 14. One of the force transmission shafts 30 is coaxially connected with the second motor 12 at the end of the coupling 25 close to the first gear 8, the shell of the second motor 12 is fixedly connected with the upper end of the cushion block 26, and the lower end of the cushion block 26 is fixedly connected with the trolley base 14. The force transmission shaft 30 which is not connected with the second motor 12 is connected with a supporting shaft block 31 at the end close to the first gear 8 through a bearing, and the supporting shaft block 31 is fixed at the upper end of the cushion block 26. When the stirring mechanism works, the second motor 12 is started, one force transmission shaft 30 connected with the second motor is driven to rotate through the coupler 25, the force transmission shaft 30 drives the first gear 8 sleeved on the force transmission shaft to rotate, the rotating first gear 8 drives the second gear 9 to rotate through gear meshing, in this way, the stirring barrel 10 stirs through the rotation of the second gear 9, the rotation of the stirring barrel 10 and the second gear 9 drives the other first gear 8 and the auxiliary wheel 13 to rotate passively, and therefore the force transmission shaft 30 which is not connected with the second motor 12 and the first gear 8 and the auxiliary wheel 13 on the force transmission shaft do not provide power, but only play a role in auxiliary stirring.

One end of the stirring barrel 10 is provided with an inlet, the other end of the stirring barrel 10 is provided with an outlet, the outlet of the stirring barrel 10 is connected with the inlet of the pump 17 through a section of conveying pipeline 16, and the pump 17 is fixedly connected on the base sliding plate 6 through bolts. The outlet of the pump 17 is connected via a further length of the delivery pipe 16 to a semi-cylindrical painting body 22g in a gripper painting mechanism. The lime water stirred in the stirring barrel 10 is transferred to the semi-cylindrical brushing body 22g for brushing under the action of the pump 17.

Referring to fig. 1-7 and 8, when the device for brushing lime water on trees of the present invention works, in an initial state, two sets of paw links in the paw brushing mechanism are opened in the initial state, as shown in fig. 8, i.e. the electromagnet 21h is not energized, and the two sets of paw links are in a V-shaped opened state under the action of the torsion spring 21 i. Firstly, the handle 11 is manually pushed to push the whole device to the side of the trunk 29, so that the two sets of gripper chains are aligned to the trunk, then the third motor 18 is started, the screw rod 7 is driven to rotate through the coupler 25, the base sliding plate 6 is in threaded connection with the screw rod 7, the base sliding plate 6 can move back and forth to enable the trunk 29 to enter between the two sets of gripper chains and to be in contact with the first gripper 21 and the arc surface at the front end of the painting bottom 27, then, a coil on the electromagnet 21h is electrified, the electromagnet 21h works, the electromagnet 21h attracts the second gripper 22, the third gripper 23 and the fourth gripper 24 to rotate towards the direction of embracing the trunk 29 through magnetic force, and the two sets of gripper chains are encircled with the trunk 29. When the brushing bodies 22g in the two sets of gripper chains contact the trunk 29, the brushing bodies 22g are pressed by the trunk 29 and move back, the return springs 22e and the second symmetrically arranged spraying pipelines 22c are driven to move in the direction opposite to the direction of the stress on the tree 29, each pressure sensor 22d detects the pressure of each return spring 22e, when each pressure sensor 22d reaches a preset pressure value, the corresponding electromagnet 21h stably keeps the magnetic force thereof not to increase, and at this time, each brushing body 22g is tightly attached to the tree 29, as shown in fig. 9.

To accommodate painting of tree trunks 29 of different diameters, when the coil on the electromagnet 21h is energized, the first section of the gripper 21 is held open when no external force is applied due to the torsional spring 21i torque between the first section of the gripper 21 and the gripper base 20. The second section of the paw frame 22k enables the rotation angle between the paws, and the closing and the opening of the paws are realized through the combined action of the electromagnet 21h and the torsion spring 21 i. Therefore, the electromagnet 21h on the first section of the gripper 21 is energized, the second section of the gripper 22 is attracted by magnetic force to rotate in the direction of embracing the trunk 29, when the second section of the gripper 22 contacts the trunk 29, the brushing body 22g moves back under the extrusion of the trunk 29, when the pressure sensor 22d on the second section of the gripper 22 reaches a preset pressure value, the electromagnet 21h stably keeps the magnetic force thereof not to increase, and at this time, the brushing body 22g of the second section of the gripper 22 is extruded and attached to the trunk 29. Then the electromagnet 21h in the second gripper 22 is energized, the third gripper 23 is attracted by magnetic force to rotate, when the pressure sensor 22d on the third gripper 23 reaches a preset pressure value, the electromagnet 21h stably keeps the magnetic force thereof not to increase, and at this time, the brushing body 22g of the third gripper 23 is squeezed and attached to the trunk 29. Similarly, the electromagnets 21h on each section of the paw on the two groups of paw chains which are staggered in the up-down space are sequentially electrified one by one, and the brushing body 22g of each section of paw is attached to the trunk 29, so that the two groups of paw chains are closely attached to the trunks with different diameters.

Lime water is put into the stirring barrel 10 from the inlet of the stirring barrel 10, a second motor 12 in the power transmission device is started, a force transmission shaft 30 is driven to rotate through a coupler 25, the force transmission shaft 30 drives a first gear 8 to rotate, the first gear 8 drives a second gear 9 to rotate through gear meshing, the stirring barrel 10 rotates through the rotation of the second gear 9 to stir the lime water in the lime water, and after the lime water is uniformly stirred, a pump 17 is started, and the lime water is conveyed into the semi-cylindrical painting and brushing body 21g from the stirring barrel 10 through a conveying pipeline 16. Then, the first motor 5 is started to drive the eccentric wheel 3 and the connecting rod 2 to rotate, so that the sliding block 1a is driven to move upwards in the guide rail 1 to realize the painting operation of the painting and brushing body 21g on the trunk 29, the lime water is evenly painted on the surface of the tree 29, and the lime water is guaranteed to be painted to a certain height. The painting body 21g is a single-pass painting operation upward, and a finish-of-painting-return operation downward. In the upward brushing process, when encountering an irregular trunk 29 with a distorted shape, the upper surface of the paw base 20 is kept horizontal at the beginning, the paw base 20 rotates through the bearing 20a to keep the upward moving track to be always vertical to the radial direction of the trunk 29 at the moment, and the paw base 20 rotates through the rotation of the bearing 20a to drive the paw torsion return springs 19 at two sides to deform, so that the paw torsion return springs are in an unbalanced state. When the single upward brushing is completed, the pump 17 is de-energized, the supply of lime water in the brushing body 21g by the pump 17 is stopped, and at the same time the first motor 5 is stopped and the slider-crank mechanism is stopped from moving. Each electromagnet 21h of each section of paw is powered off, the magnetic force disappears, under the action of the torque of the torsion spring 21i, the two groups of paw chains are restored to the initial opening state from the state of embracing the trunk 29, and under the action of the elastic force of the paw torsion return spring 19, the upper surface of the paw base 20 is restored to the horizontal state. Then, the energization of the first motor 5 is recovered, the rotation of the eccentric wheel 3 in the crank-slider mechanism drives the connecting rod 2 to rotate, the rotation of the connecting rod 2 drives the slider 1a to move downwards along the slide rail 1, the downward movement of the slider 1a drives the connected paw painting mechanism to move downwards to the bottom of the trunk 29, the first motor 5 is powered off, one-time painting operation is finished, and the initial painting state is recovered.