CN111083953A

CN111083953A - Accurate material adjusting, spreading and applying mechanism

Info

Publication number: CN111083953A
Application number: CN201911224440.4A
Authority: CN
Inventors: 李明; 李丹岚; 甄琦; 孙凯; 冬梅; 王海超
Original assignee: Inner Mongolia Agricultural University
Current assignee: Inner Mongolia Agricultural University
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-05-01
Anticipated expiration: 2039-12-04
Also published as: CN111083953B

Abstract

The invention discloses a material accurate adjustment paving mechanism which mainly comprises an outer end plate, an adjusting plate, a material taking radial plate, an outer connecting rod, a push rod, a threaded sleeve, a middle shaft and a lead screw; the material taking radial plates are arranged on the outer wall of the middle shaft and are radially distributed on the middle shaft, and a screw rod is rotatably arranged in the middle shaft; the material taking web plate is provided with metering plates in a sliding mode, and the adjacent metering plates are overlapped to form the bottom surfaces of the adjacent material taking web plates; outer end plates are arranged at two ends of the material taking radial plate, and slideways are arranged on the outer end plates in a radial array mode from the center; the device can accurately spread and apply the material on the working face, and can adjust the mechanism of required spreading and applying amount and spreading and applying speed as required, can extensively be applicable to dry and wet crushed materials or mixtures such as coal gangue, sand, plant, silt, etc., and the result of adjusting the amount is accurate and easy to operate, has very important practical significance to the popularization and the industrialization extension of the theoretical technique in the sand prevention and fixation field.

Description

Accurate material adjusting, spreading and applying mechanism

Technical Field

The invention relates to the field of sand prevention and control, in particular to a material accurate adjusting paving mechanism.

Background

Desertification is a major ecological problem facing the world. China is one of the countries in the world with the largest desertification area, the most affected population and the most serious harm of wind and sand. Large areas of arid, semi-arid and sub-humid arid regions are distributed in the northwest, the northern China and the northeast and west China, the ecological environment is extremely fragile, and the situation of land desertification is increasingly serious under the increasing population pressure.

The traditional method divides the sand damage prevention and control technology into three categories, namely engineering measures, chemical measures and biological measures. Biological sand control, also commonly called plant sand control, is a technical measure for controlling deserts, stabilizing oasis, and improving the environmental quality and productivity of sand areas by means of sealing and cultivating plants and the like. Engineering sand control refers to a technical system for preventing sand wind hazard by adopting various mechanical engineering means, which is generally called mechanical sand fixation, and achieves the purposes of reducing sand wind and preventing sand wind hazard by blocking, transporting, guiding and fixing the sand wind. Chemical sand fixation refers to a technical measure of applying organic or inorganic sand soil stabilizing materials on the surface of desertified land to improve the stability and water retention of sand soil, or desalting saline-alkali soil to control and improve the environment of sand damage and improve the productivity of sand land. The invention takes chemical sand fixation as background, researches a mechanism capable of effectively spreading materials and realizing accurate adjustment of spreading amount, and has very important practical significance for popularization and industrial extension of theoretical technology in the field of sand prevention and sand fixation. The material accurate adjustment paving mechanism takes chemical sand stabilization as a background, but is not limited to the application in the field.

The same type or similar patents are not searched for at present. Therefore, similar purpose patents are compared, the invention patent with the application number of 201910318344.X discloses a fertilizing, rotary tillage, pressing and soil crushing all-in-one machine, the fertilizing function of the machine is mainly realized by a fertilizer box, a fertilizer discharging port, a fertilizer discharger and a bulk cargo plate, a motor drives a fertilizer discharging shaft to rotate, the adjustment of the fertilizing amount can only be realized by adjusting the rotating speed of the motor, and the adjusting method is single and inaccurate. The invention discloses a rotary tillage fertilizer applicator with application number 201811566257.8, the fertilizing function is mainly realized by a fertilizer storage groove and a fertilizing shovel, a fertilizer outlet is circular, and different fertilizing amount needs are adjusted only by adjusting the rotating speed of a dial wheel. Therefore, the fertilizing amount adjusting method of the two patents is single, only through rotating speed adjustment, meanwhile, a certain number of fertilizing ports or bulk cargo plates are arranged one by one at a certain interval, the material spreading amount between every two fertilizing ports or bulk cargo plates is uneven due to the size of the interval, the materials are scattered, and uniform spreading of the materials corresponding to a certain width cannot be achieved.

Disclosure of Invention

The invention aims to provide a mechanism which can accurately spread materials on a working surface and can adjust the required spreading amount and spreading speed according to requirements, and the mechanism can be widely applied to dry and wet crushed materials or mixtures such as coal gangue, sand, plants, silt and the like, and has accurate adjustment result and easy operation.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a material accurate adjustment paving mechanism which mainly comprises an outer end plate, an adjusting plate, a material taking radial plate, an outer connecting rod, a push rod, a threaded sleeve, a middle shaft and a lead screw, wherein the outer end plate is fixedly connected with the adjusting plate; the material taking radial plate is arranged on the outer wall of the middle shaft and is radially distributed on the middle shaft, and a screw rod is rotatably arranged in the middle shaft; the material taking radial plate is slidably provided with metering plates, and adjacent metering plates are overlapped to form the bottom surface of the material taking cavity; outer end plates are arranged at two ends of the material taking radial plate, and slideways are arranged on the outer end plates in a radial array mode from the center; the end part of the adjusting plate penetrates through the outer end plate and is provided with a connecting structure, the adjacent connecting structures are connected through an outer connecting rod, the outer connecting rod is provided with a sliding block, and the sliding block is arranged in the slideway and slides along the slideway; the screw rod is provided with a threaded sleeve, and a hinge seat on the threaded sleeve penetrates through the middle shaft and is hinged with the outer connecting rod through a push rod; the chain wheel is installed on the middle shaft and connected with the traveling wheel.

Preferably, the middle shaft is of a hollow tubular structure, assembling grooves for the hinge seats on the screw sleeve to penetrate through are formed in two ends of the middle shaft, and the number of the assembling grooves is consistent with that of the hinge seats on the screw sleeve.

Preferably, two threads with different rotation directions are arranged at two ends of the screw rod, and the screw rod rotates along one direction, so that the thread sleeves mounted on the screw rod move in the opposite direction.

Preferably, the quantity adjusting plate comprises a sliding sleeve and a wing plate which are matched with the material taking radial plate; wing plates are fixed at two ends of the sliding sleeve, and adjacent wing plates are overlapped and butted.

Furthermore, an assembly gap for the end part of the sliding sleeve to pass through is arranged on the outer end plate, and the assembly gap is distributed in a radiation mode with the center of the circle of the outer end plate as the center.

Furthermore, the overlapping and butting modes comprise an occlusion overlapping mode and an up-and-down overlapping mode, in the occlusion overlapping mode, the wing plate on one side of the sliding sleeve is of a double-layer structure, a gap is formed between the double-layer structure, and the gap is the thickness of one wing plate; the other side of the sliding sleeve is provided with a single-layer structure, and the single-layer structure is positioned between the double-layer wing plates after being mirrored; in the up-and-down overlapping mode, the wing plates on the left side and the right side of the sliding sleeve are fixed with a height difference which is the thickness of one wing plate.

Preferably, the connecting structure on the adjusting plate is an axle boss.

Preferably, the outer connecting rod is of a T-shaped structure, rectangular through holes are formed in two ends of the horizontal section of the outer connecting rod, the shaft boss is located in the rectangular through holes, when the adjusting plate slides up and down, the moving path of the shaft boss is oblique, and the rectangular through holes can ensure that the collision with the path of the shaft boss cannot be caused.

Preferably, the screw rod is assembled and mounted with the middle shaft through the end sleeve, the screw rod can rotate in situ relative to the middle shaft, and a screwing end is machined at one end of the screw rod, such as a flat shape, a regular hexagonal shape and the like, so that the clamping, rotating and adjusting are facilitated.

Preferably, the chain wheel is fixedly connected with the middle shaft in a key way assembly mode.

The invention has the beneficial effects that:

(1) the method can be suitable for the low coverage theory sand control method, realizes the row belt type paving operation, and achieves the row belt type configuration pattern based on the low coverage theory. The low coverage sand control is a new concept and a new technology for desertification control, and is a novel sand control mode which is based on the idea of near-nature forestry, can completely fix quicksand, accelerate the restoration of soil vegetation, improve the biological productivity, save the ecological water and realize the sustainable development of a sand fixation forest and has the coverage of 15-25 percent.

(2) The method has strong operability and practicability, can realize an industrialization mode, can be applied to the industrialization of new materials and new equipment with low coverage or the ecological desertification control industry and an industrial chain, can expand a low coverage desertification control theoretical system, improve the water utilization efficiency, improve the benefits of the desertification industry and realize the win-win of ecological, economic and social benefits.

(3) The invention discloses an innovative material taking amount adjusting method, the original idea of changing the material amount is to change the operation width L or the mechanism running speed, the invention changes the sectional area of a material taking groove by changing the (trapezoid) depth of the trapezoid material taking groove according to the fact that the total material amount V is equal to the sectional area S multiplied by the operation width L under the condition that the transverse operation width is fixed, and the adjusting mode can meet the requirement of accurate application of the width, such as the improvement of saline-alkali soil and the desert sand control field, and can be used for fertilizing and seeding.

(4) The material quantity regulation of the invention is stepless regulation, the automatic regulation can be realized by connecting the screw rod with an asynchronous motor, or a manual regulation mode is adopted, and when the control is carried out, one end of the screw rod is rotated, so that the simultaneous movement of 8 quantity regulation plates can be realized, thereby realizing the synchronous regulation of the material taking quantity of all material taking grooves, and the regulation mode is simple and easy to operate and has reliable regulation result.

(5) The adjusting mechanism of the invention realizes the convenience and high efficiency of the operation mode through the linkage action among the rod pieces according to the geometric relationship and the motion relationship formed among the screw rod, the threaded sleeve, the push rod, the outer connecting rod and the quantity adjusting plate.

(6) The mechanism is integrally fixed on the frame, and the paving speed of the integral mechanism can be adjusted by adjusting and matching the speed of a walking wheel of the frame and the speed of a lead screw.

(7) The invention has wide application range, can be applied to industries such as desertification control, agriculture, forestry and the like in the professional field, and can be widely applied to dry and wet crushed materials or mixtures such as coal gangue, sand, plants, silt and the like in the aspect of the characteristics of the extracted materials.

(8) According to the invention, through the adjustment in a screw transmission mode, accurate stepless adjustment can be realized, so that the amount of the sprayed materials can be controlled more accurately; meanwhile, the transmission mechanism is positioned in the middle shaft, the sealing can be better, and if dust covers are additionally arranged at two ends of the transmission mechanism, the problem that certain dust and gravel enter a transmission part of the transmission mechanism to cause the transmission mechanism to be blocked can be avoided.

Drawings

Fig. 1 is a schematic diagram of the overall working process of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a schematic view of the bottom bracket structure of the present invention.

Fig. 4 is a schematic diagram of a quantity adjusting plate structure of the present invention.

Fig. 5 is a schematic sectional structure view of the screw of the present invention.

Fig. 6 is a schematic diagram of an outer end plate structure according to the present invention.

Fig. 7 is a geometric schematic diagram of the material taking groove.

FIG. 8 is a schematic view of the geometry of the lead screw and the push rod.

Wherein the reference numerals are:

the device comprises an outer end plate 1, a slideway 1-1, a quantity adjusting plate 2, a connecting structure 2-1, a sliding sleeve 2-2, a wing plate 2-3, a material taking radial plate 3, an outer connecting rod 4, a push rod 5, a threaded sleeve 6, a middle shaft 7, an assembling groove 7-1, a sliding block 8 and a lead screw 9.

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 present application, 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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-8, the present invention provides a material precise adjustment spreading mechanism, which mainly includes an outer end plate 1, an adjustment plate 2, a material taking web plate 3, an outer connecting rod 4, a push rod 5, a threaded sleeve 6, a middle shaft 7, and a lead screw 9; the material taking spoke plate is characterized in that (eight) material taking spoke plates 3 are arranged on the outer wall of the middle shaft 7, the material taking spoke plates 3 are distributed on the middle shaft 7 in a radial shape, and the material taking spoke plates 3 can be welded and assembled in an interference fit mode through connection with the middle shaft 7; a screw rod 9 is rotatably arranged in the middle shaft 7, both ends of the screw rod 9 are provided with bearings, and the outer rings of the bearings are assembled in the middle shaft 7; the material taking radial plate 3 is provided with the metering plates 2 in a sliding manner (along the material taking radial plate 3), the adjacent metering plates 2 are overlapped to form the bottom surface of the adjacent material taking radial plate 3, the depth of a material taking groove formed by the adjacent material taking radial plate 3, the adjacent metering plates 2 and the outer end plates 1 at two ends is adjustable due to the sliding of the metering plates 2, and the metering plates 2 are arranged in an overlapping manner, so that when the depth of the material taking groove is adjusted, the bottom surface cannot have a gap and the material is leaked; the two ends of the material taking radial plate 3 are provided with outer end plates 1, and the outer end plates 1 are provided with slideways 1-1 in a radial array in the center (the number of the slideways 1-1 is half of the number of the material taking radial plate 3); the end part of the adjusting plate 2 penetrates through the outer end plate 1 and is provided with a connecting structure 2-1, such as a shaft boss, so that the structure for (directly or indirectly) connecting the adjusting plate 2 and the screw rod 9 can be realized; the adjacent connecting structures 2-1 are connected through an outer connecting rod 4, a sliding block 8 is arranged on the outer connecting rod 4, and the sliding block 8 is arranged in the slideway 1-1 and can slide along the slideway 1-1; the screw rod 9 is provided with a threaded sleeve 6, and the thread on the threaded sleeve 6 is matched with the thread on the screw rod 9; the hinged seat on the threaded sleeve 6 passes through the middle shaft 7 and is hinged with the outer connecting rod 4 through the push rod 5; the chain wheel is arranged on the middle shaft 7 and fixedly connected with the middle shaft 7 in a key groove assembly (or interference assembly) mode; the chain wheel is connected with the traveling wheel, and the mechanism can ensure that the spraying amount and the movement speed are linked.

In the invention, the middle shaft 7 is of a hollow tubular structure, the two ends of the middle shaft 7 are provided with assembly grooves 7-1 for the hinge seats on the screw sleeve 6 to pass through, the number of the assembly grooves 7-1 is the same as that of the hinge seats on the screw sleeve 6, and the hinge seats on the screw sleeve 6 pass through the assembly grooves 7-1 for installation, so that the screw sleeve 6 is prevented from being linked due to left and right friction forces while the screw rod 9 is rotated. Considering that the rotation of the screw 9 is to ensure the uniformity of the force, the screw sockets 6 should move in opposite directions, so that two threads with different rotation directions exist on the screw 9, and the screw 9 rotates in one direction, so that the screw sockets 6 mounted on the screw 9 can move in opposite directions (i.e. move towards the end of the screw 9 or move towards the middle point of the screw 9 at the same time).

In the invention, the quantity adjusting plate 2 comprises a sliding sleeve 2-2 and a wing plate 2-3 which are matched with the material taking radial plate 3; wing plates 2-3 are welded at two ends of the sliding sleeve 2-2, and the adjacent wing plates 2-3 are overlapped and butted. Considering the assembly problem, be equipped with the assembly gap that is used for sliding sleeve 2-2 tip to pass on outer end plate 1, the outer end plate 1 centre of a circle is the central radiation distribution outside the assembly gap, when installing outer end plate 1 and transfer board 2, first laminating on outer end plate 1 gets material radials 3 and installs, assembly gap and getting material radials 3 counterpoint on the outer end plate 1, then with the sliding sleeve 2-2 suit on the transfer board 2 on getting material radials 3 and outer end, the mechanism just so can not have the conflict, consider the frictional force between the minimum mechanism simultaneously, sliding sleeve 2-2 is when sliding, produces the slip on the outer end, both the clearance between sliding sleeve 2-2 and the material radials 3 is greater than the clearance between sliding sleeve 2-2 and the outer end plate 1. In the invention, the overlapping and butting mode comprises two modes of occlusion overlapping and up-down overlapping; in occlusion overlapping, the wing plates 2-3 on one side of the sliding sleeve 2-2 are of double-layer structures, and a gap is arranged between the double-layer structures and is the thickness of one wing plate 2-3; the other side of the sliding sleeve 2-2 is of a single-layer structure, and the single-layer structure is positioned between the double-layer wing plates 2-3 after being mirrored; in the up-and-down overlapping mode, the wing plates 2-3 at the left and right sides of the sliding sleeve 2-2 are fixed with a height difference, and the height difference is the thickness of one wing plate 2-3.

In the invention, the outer connecting rod 4 is of a T-shaped structure, rectangular through holes are formed in two ends of the horizontal section of the outer connecting rod 4, and the shaft boss is positioned in the rectangular through holes, so that the shaft boss has freedom degrees in the left and right directions in the rectangular through holes; when the adjusting plate 2 is slid up and down, the moving path of the boss is oblique, and the rectangular through hole can ensure that the collision with the path of the boss is avoided.

In the invention, the lead screw 9 is assembled and mounted with the central shaft 7 through the end sleeve, the lead screw 9 can rotate in situ relative to the central shaft 7, and a screwing end is processed at one end of the lead screw 9, such as a flat shape, a regular hexagon shape and the like, so that the clamping, rotating and adjusting are convenient.

In the invention, as shown in fig. 1, in the rotating process of the mechanism, when any material taking groove rotates to the position right above at a certain time, the material in the material hopper on the material taking groove falls into the material taking groove, and when the material taking groove continues to rotate to the position below, the material in the material taking groove falls onto a working surface along with the material taking groove, so that a material surface layer with a certain width and thickness corresponding to the width of the mechanism is formed. The whole accurate material spreading mechanism is arranged on a rack through a middle shaft 7 and a bearing, and the rack travels on the ground to drive the accurate material spreading mechanism to move; the speed of the travelling wheel on the frame is matched with the speed of the screw 9 (such as changing the transmission ratio of a chain wheel) to realize the adjustment of the paving speed of the whole mechanism, and the position of the adjusting plate 2 is adjusted through manual or electric control of the screw 9 so as to achieve the purpose of adjusting the material taking amount. Considering the regulation of the screw rod 9, the screw rod 9 can be connected with an asynchronous motor to realize automatic speed regulation, or a manual regulation mode is adopted, and one end of the screw rod 9 is rotated during control, so that the metering plate 2 can move simultaneously, and the synchronous regulation of the material taking amount of all the material taking grooves is realized simultaneously. Meanwhile, two ends of the lead screw 9 are designed in a stepped manner, and the stepped portion is matched with the end face of the ring sleeve to achieve the purposes of limiting and fixing.

As shown in fig. 3, the middle shaft 7 may be made of a circular tube, a square groove in the middle may be used to insert and fix the material taking web 3, an axial hollow portion passes through the screw rod 9, assembling grooves 7-1 are provided at both ends, the positions of the assembling grooves 7-1 are uniformly arranged in the circumferential direction at an angle of 90 °, and the axial length of the assembling grooves 7-1 is adapted to the displacement of the screw sleeve 6.

In the invention, the principle and process of specifically adjusting the material amount are as follows:

the material taking radial plate 3, the adjusting plate 2, the outer connecting rod 4 and the push rod 5 are used in a set and are uniformly arranged in the circumferential direction at equal angles. As shown in fig. 7, every two material taking webs 3, the metering plate 2 and the end plate form the material taking groove, and the cross section ABCD of the material taking groove is trapezoidal. Specifically, the adjacent material taking radial plates 3 form two side edges of the trapezoidal cross section of the material taking groove; the upper surface formed after the material falls into the material taking groove is the upper bottom edge AB = a of the trapezoidal cross section of the material taking groove; the right side diaphragm of first adjusting plate 2 and the left side diaphragm of second adjusting plate 2 overlap joint each other, form the bottom of getting the silo, and trapezoidal cross-section's lower base CD = b promptly. Therefore, the volume of the material taken by the material taking groove can be determined by the cross sectional area and the mechanism width, and the specific calculation process is as follows:

formula (1)

Formula (2)

In the formula, V is the volume of the material taken by the material taking groove, S is the sectional area of the material taking groove, a is the upper bottom edge of the trapezoidal section of the material taking groove, b is the lower bottom edge of the trapezoidal section of the material taking groove, h is the height of the trapezoidal section, and L is the operation width of the accurate material spreading mechanism.

Specifically, when the lead screw 9 is rotated outwards, the threaded sleeve 6 moves outwards, the push rod 5 is driven to move, the push rod 5 is connected with the outer connecting rod 4, the outer connecting rod 4 is pushed to move upwards, the outer connecting rod 4 enables the metering plate 2 to move outwards in the radial direction through the sliding groove, displacement of the metering plate 2 in the radial direction is achieved, the length a of the upper bottom edge of the trapezoidal cross section of the material taking groove is changed through the change of the lapping amount of the two transverse plates, the height h of the trapezoidal cross section of the material taking groove is changed through the change of the radial vertical displacement of the metering plate 2, the volume V of the taken material is influenced by the length a and the height h of the upper bottom edge of the material taking groove through the formulas (1) and (2), and the purpose of adjusting the material taking amount through the rotation of the adjusting lead.

The relationship between the transverse displacement of the screw sleeve 6 and the radial vertical displacement of the adjusting plate 2 is shown in figure 8,

in the figure, point E represents the initial position of the screw sleeve 6, point E 'represents the end position of the screw sleeve 6, point F corresponds to the initial position of the slide block 8, point F' corresponds to the moved position of the slide block 8, point EF corresponds to the position 1 of the push rod 5, point E 'F' corresponds to the pushed position of the push rod 5, when the lead screw 9 is rotated outwards, the sliding sleeve 2-2 is moved from the initial position to the subsequent position, namely from point E to point E ', correspondingly, the movement of the screw sleeve 6 drives the push rod 5 to move from the position EF to the position E' F ', so that the slide block 8 is moved from point F to point F', the slide block 8 moves outwards along the radial direction to drive the outer connecting rod 4 to move outwards along the radial direction, so that the displacement generated corresponds to △ h in the figure.

The adjustment of the material taking amount is successfully realized through the processes.

The above disclosure of the preferred embodiments of the invention is provided merely as an aid in illustrating the principles and methods of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The number, structure, connection mode and the like of all the parts can be changed, and the equivalent transformation and improvement on the basis of the technical scheme of the invention are not excluded from the protection scope of the invention.

Claims

1. A material accurate adjustment paving mechanism mainly comprises an outer end plate, an adjusting plate, a material taking radial plate, an outer connecting rod, a push rod, a threaded sleeve, a middle shaft and a lead screw; the material taking radial plate is arranged on the outer wall of the middle shaft and is radially distributed on the middle shaft, and a screw rod is rotatably arranged in the middle shaft; the material taking web plate is provided with metering plates in a sliding mode, and the adjacent metering plates are overlapped to form the bottom surfaces of the adjacent material taking web plates; outer end plates are arranged at two ends of the material taking radial plate, and slideways are arranged on the outer end plates in a radial array mode from the center; the end part of the adjusting plate penetrates through the outer end plate and is provided with a connecting structure, the adjacent connecting structures are connected through an outer connecting rod, the outer connecting rod is provided with a sliding block, and the sliding block is arranged in the slideway and slides along the slideway; the screw rod is provided with a threaded sleeve, and a hinge seat on the threaded sleeve penetrates through the middle shaft and is hinged with the outer connecting rod through a push rod; the chain wheel is installed on the middle shaft and connected with the traveling wheel.

2. The accurate material adjusting and spreading mechanism of claim 1, wherein: the middle shaft is of a hollow tubular structure, assembly grooves for the hinge seats on the threaded sleeves to penetrate through are formed in the two ends of the middle shaft, and the number of the assembly grooves is consistent with that of the hinge seats on the threaded sleeves.

3. The accurate material adjusting and spreading mechanism of claim 1, wherein: two threads with different rotation directions are arranged at two ends of the screw rod, and the screw rod rotates along one direction, so that the thread sleeves arranged on the screw rod move in opposite directions.

4. The accurate material adjusting and spreading mechanism of claim 1, wherein: the quantity adjusting plate comprises a sliding sleeve and a wing plate which are matched with the material taking radial plate; wing plates are fixed at two ends of the sliding sleeve, and adjacent wing plates are overlapped and butted.

5. The accurate material adjusting and spreading mechanism of claim 4, wherein: the outer end plate is provided with an assembly gap for the end part of the sliding sleeve to pass through, and the assembly gap is distributed in a radiation mode with the center of the outer end plate as the center.

6. The accurate material adjusting and spreading mechanism of claim 4, wherein: the overlapped butt joint mode comprises an occlusion overlapping mode and an up-down overlapping mode, in the occlusion overlapping mode, the wing plate on one side of the sliding sleeve is of a double-layer structure, a gap is formed between the double-layer structure, and the gap is the thickness of one wing plate; the other side of the sliding sleeve is provided with a single-layer structure, and the single-layer structure is positioned between the double-layer wing plates after being mirrored; in the up-and-down overlapping mode, the wing plates on the left side and the right side of the sliding sleeve are fixed with a height difference which is the thickness of one wing plate.

7. The accurate material adjusting and spreading mechanism of claim 1, wherein: the connecting structure on the adjusting plate is an axial convex.

8. A material precision adjustment spreading mechanism according to any one of claims 1 to 7, wherein: the outer connecting rod is of a T-shaped structure, rectangular through holes are formed in two ends of the horizontal section of the outer connecting rod, and the shaft boss is located in the rectangular through holes.

9. The accurate material adjusting and spreading mechanism of claim 1, wherein: the lead screw is assembled and installed with the middle shaft through the end sleeve, the lead screw can rotate in situ relative to the middle shaft, and a screwing end is machined at one end of the lead screw, such as a flat shape and a regular hexagon shape.

10. The accurate material adjusting and spreading mechanism of claim 1, wherein: the chain wheel is fixedly connected with the middle shaft in a key groove assembly mode.