Double-cutter-bar symmetrical reciprocating type modular cutter

Abstract

The invention relates to the technical field of double-cutter-bar cutters, and discloses a double-cutter-bar symmetrical reciprocating type modularized cutter which comprises a sub-protector set, a cutter bar set, a cutting knife, a driving mechanism, a rack and a power device, the sub-protector set is installed on the front side of the rack, the cutter bar set is composed of a left cutter bar set and a right cutter bar set which are distributed on the two sides of the cutter, and the left cutter bar set and the right cutter bar set are arranged on the front side of the rack. A plurality of cutters are fixedly mounted at the top of each of the left cutter bar group and the right cutter bar group; and the cutter bar groups are connected with the branch protector group in a sliding manner. According to the invention, the five-connecting-rod three-guide-rod driving mechanism is designed, the same power source is adopted to realize the reverse reciprocating motion of the 180-degree phase difference of the double cutter bars, so that the inertia forces on the two sides are mutually counteracted, and the effect of suppressing vibration from the root of dynamics is achieved; the problems of machining and transportation of large-cutting-width parts are solved, and by designing the single-body form of the branch protector, the branch protector can work under the ground more easily.

Description

Technical Field

[0001] The present invention relates to the technical field of reciprocating cutters, and in particular to a double-knife-bar symmetric reciprocating modular cutter. Background Art

[0002] In the field of agricultural machinery, reciprocating cutters are the core working components of equipment such as combine harvesters and mowers. They drive the cutter to make high-speed reciprocating movements through the knife bar, and cooperate with the knife guards to achieve the cutting of crops or forages. With the increasing requirements for operation efficiency in modern agriculture, large-cutting-width cutters have gradually become the mainstream demand.

[0003] In the prior art, the problems of vibration and noise are prominent: the ultra-long knife bar and the densely arranged cutters lead to a significant increase in the overall mass, generating significant inertial forces during high-speed reciprocating movements, resulting in strong vibrations. This not only reduces the cutting quality, such as crop tearing and uneven stubble, but also accelerates the wear of transmission components such as bearings and connecting rods, and even causes structural fatigue fracture. After the vibration is transmitted to the frame, it further causes driver operation fatigue, and the noise pollution is serious. Processing and transportation limitations: when the length of the integral knife bar is too large, the difficulty of heat treatment and straightness control increases sharply, the processing cost is high and the yield is low. The transportation of the ultra-long knife bar requires special vehicles or disassembly into sections and then reassembly, with low logistics efficiency and easy deformation and damage. High maintenance cost: if a local part of the knife bar is damaged, such as deformation or fracture, usually the whole knife bar needs to be replaced, resulting in material waste and economic losses. The prior art fails to solve the contradiction between vibration control and engineering feasibility of large-cutting-width cutters at the same time. Summary of the Invention

[0004] To make up for the above deficiencies, the present invention provides a double-knife-bar symmetric reciprocating modular cutter, aiming to improve the problem that the prior art fails to solve the contradiction between vibration control and engineering feasibility of large-cutting-width cutters at the same time.

[0005] To achieve the above object, the present invention adopts the following technical solution: A double-knife-bar symmetric reciprocating modular cutter, including a sub-knife-guard group, a knife-bar group, cutters, a driving mechanism, a frame and a power device. The sub-knife-guard group is installed on the front side of the frame. The knife-bar group is composed of a left knife-bar group and a right knife-bar group distributed on both sides of the cutter. A plurality of cutters are fixedly installed at the tops of both the left knife-bar group and the right knife-bar group. The knife-bar group is slidably connected to the sub-knife-guard group;

[0006] The sub-protector group includes a first sub-protector, a second sub-protector, a left first-class sub-protector group, a left second-class sub-protector group, a right first-class sub-protector group, a right second-class sub-protector group, a general sub-protector group, and positioning pins. The first sub-protector is a single sub-protector, with a pointed front and a rearward shape, and is provided with a cutter bar cutter hole, a docking card hole, an installation card slot, and a positioning pin hole. Its width is slightly larger than twice the width of the cutter, and it is located in the exact middle of the sub-protector group. It is connected to the frame through the installation card slot, and the positioning pin is inserted into the positioning pin hole to fix it.

[0007] As a further description of the above technical solution:

[0008] The second sub-protector is also a single sub-protector, with a certain number, symmetrically distributed on both sides of the cutter. It is similar to the first sub-protector in characteristics, and its width is the same as the width of the cutter. Its installation and fixation method on the frame is the same as that of the first sub-protector. The left first-class sub-protector group is composed of several single sub-protectors, and is provided with a cutter bar cutter hole, a first boss, a second boss, a ball groove, and installation bolt holes; the width of the first boss is smaller than that of the second boss, and both are provided with positioning pin holes; insert the second boss of the left first-class sub-protector group into the left half docking card hole of the first sub-protector. When the two positioning pin holes are coaxial, insert the positioning pin into the coaxial positioning pin holes to complete the connection between the left first-class sub-protector group and the first sub-protector; the left first-class sub-protector group is tightly connected to the frame by bolts through the installation bolt holes.

[0009] As a further description of the above technical solution:

[0010] The right first-class sub-protector group is also composed of several single sub-protectors, and is in a mirror image relationship with the left first-class sub-protector group about the longitudinal center plane of the cutter. It is also provided with a cutter bar cutter hole, a first boss, a second boss, a ball groove, and installation bolt holes. Both the first boss and the second boss are provided with positioning pin holes. Insert the second boss of the right first-class sub-protector group into the right half docking card hole of the first sub-protector. When the two positioning pin holes are coaxial, insert the positioning pin into the coaxial positioning pin holes to complete the connection between the right first-class sub-protector group and the first sub-protector; the right first-class sub-protector group is tightly connected to the frame by bolts through the installation bolt holes. The first boss of the left first-class sub-protector group is inserted into the right half docking card hole of the second sub-protector on the left side of the cutter and is fixedly connected through the positioning pin. The first boss of the right first-class sub-protector group is inserted into the left half docking card hole of the second sub-protector on the right side of the cutter and is fixedly connected through the positioning pin.

[0011] As a further description of the above technical solution:

[0012] The general sub-protector group is also composed of several sub-protector units, with a certain number, symmetrically distributed on both sides of the cutter. The cutter bar cutter holes, first bosses, ball grooves, mounting bolt holes and positioning pin holes are also arranged. Different from the left first-class sub-protector group and the right first-class sub-protector group, the general sub-protector group is a left-right symmetric structure. The first boss on the left side is inserted into the right half docking card hole of a second sub-protector, and the first boss on the right side is inserted into the left half docking card hole of another second sub-protector. The general sub-protector group is fixedly connected to the frame by bolts through the mounting bolt holes; by increasing or decreasing the number of the second sub-protectors and the general sub-protector group, or changing the length of the general sub-protector group, the length of the entire sub-protector group can be adjusted to meet the requirements of different cutter cutting widths.

[0013] As a further description of the above technical solution:

[0014] The left second-class sub-protector group is also composed of several sub-protector units, and the cutter bar cutter holes, first bosses, ball grooves, mounting bolt holes and positioning pin holes are also arranged. It is located on the leftmost side of the cutter. The first boss of the left second-class sub-protector group is inserted into the left half docking card hole of the second sub-protector on the leftmost side of the cutter and is fixedly connected by the positioning pin, and is fixedly connected to the frame by bolts through the mounting bolt holes.

[0015] As a further description of the above technical solution:

[0016] The right second-class sub-protector group is also composed of several sub-protector units, which is in a mirror image relationship with the left second-class sub-protector group about the longitudinal center plane of the cutter. The cutter bar cutter holes, first bosses, ball grooves, mounting bolt holes and positioning pin holes are also arranged. It is located on the rightmost side of the cutter. The right second-class sub-protector group is inserted into the right half docking card hole of the second sub-protector on the rightmost side of the cutter and is fixedly connected by the positioning pin, and is fixedly connected to the frame by bolts through the mounting bolt holes.

[0017] As a further description of the above technical solution:

[0018] When the first convex platform and the second convex platform of the first protector, the second protector, the left first-class protector group, the left second-class protector group, the right first-class protector group, the right second-class protector group and the general protector group are properly fitted with the docking card holes, the cutter bar cutter holes of each component are aligned horizontally in the cutter. There are several ball grooves. By adding balls into the ball grooves, the sliding friction is changed into rolling friction, which plays a role in reducing the frictional resistance. The protector monomers of the first protector, the second protector, the left first-class protector group, the left second-class protector group, the right first-class protector group, the right second-class protector group and the general protector group are composed of three parts. The first part is a right trapezoid with a large bottom facing upward, and there are two through holes arranged vertically on the side, namely the cutter bar cutter hole and the docking card hole respectively; the second part is a triangular prism under the inclined waist surface of the right trapezoid, and the cross section of the triangular prism is an arc-shaped isosceles triangle; the third part is a polyhedral cone in front of the right trapezoid, and the polyhedral cone includes two curved surfaces that are transitionally connected to the triangular prism.

[0019] As a further description of the above technical solution:

[0020] The cutter bar group includes a left cutter bar group, a right cutter bar group, cutters and pins. The left cutter bar group and the right cutter bar group are symmetrically arranged on the left and right sides of the longitudinal center plane of the cutter, and can slide left and right in the cutter bar cutter holes. When sliding, the lower bottom surface of the cutter bar group contacts the outer surface of the balls in the protector group. The left cutter bar group includes a left first-class cutter bar, a general cutter bar and a left second-class cutter bar from right to left. Only the left end of the left first-class cutter bar is provided with a connecting buckle. Both ends of the general cutter bar are provided with connecting buckles. Only the right end of the left second-class cutter bar is provided with a connecting buckle, and a left perforated driving seat is arranged near the left end face. The right cutter bar group includes a right first-class cutter bar, a general cutter bar and a right second-class cutter bar from left to right. Only the right end of the right first-class cutter bar is provided with a connecting buckle. Only the left end of the right second-class cutter bar is provided with a connecting buckle, and a right perforated driving seat is arranged near the right end face. The connecting buckle plays a role in connecting two components and transmitting power through surface fitting. Each component of the left cutter bar group and the right cutter bar group is connected and transmits power through the connecting buckle. By increasing or decreasing the number of general cutter bars or changing the length of the general cutter bars, the length of the entire cutter bar group can be adjusted to meet the requirements of different cutter widths. The left first-class cutter bar, the general cutter bar, the left second-class cutter bar, the right first-class cutter bar and the right second-class cutter bar are evenly provided with a number of cutter mounting grooves and pin holes at certain intervals along the axis. There are several cutters, and small holes are arranged on them. They are installed in the cutter mounting grooves. When the pin holes on the cutter bar group are coaxial with the small holes on the cutters, the pins are inserted for fixation.

[0021] As a further description of the above technical solution:

[0022] The driving mechanism includes a crank, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a first guide rod, a second guide rod, a third guide rod, a first guide rail seat, a second guide rail seat and a sliding sleeve. The number of the first guide rail seats is several, which are symmetrically arranged on the left and right sides of the cutter in the front, and are provided with two mounting holes and a sliding sleeve hole. The central connection line of the mounting holes and the central line of the sliding sleeve hole are vertically skew lines in space, and are fixedly connected to the frame through bolts. After installation, the central lines of the sliding sleeve holes of all the first guide rail seats are collinear in the horizontal direction. The number of the second guide rail seats is several, which are arranged on the cutter in the back, and are also provided with two mounting holes and a sliding sleeve hole. The central connection line of the mounting holes and the central line of the sliding sleeve hole are also vertically skew lines in space, and are fixedly connected to the frame through bolts. After installation, the central lines of the sliding sleeve holes of all the second guide rail seats are collinear in the vertical direction. The sliding sleeve is installed in the sliding sleeve holes of the first guide rail seat and the second guide rail seat by interference fit. The first guide rod is installed in the sliding sleeve on the left front side of the cutter, the second guide rod is installed in the sliding sleeve on the right front side of the cutter, and the third guide rod is installed in the sliding sleeve on the back side of the cutter. The first guide rod, the second guide rod and the third guide rod can all slide along the axis direction of the corresponding sliding sleeve. One end of the fourth connecting rod is fixedly connected to the left belt hole driving seat on the left cutter bar group, and the other end is fixedly connected to the left end of the first guide rod. One end of the fifth connecting rod is fixedly connected to the right belt hole driving seat on the right cutter bar group, and the other end is fixedly connected to the right end of the second guide rod. One end of the second connecting rod is hinged to the right end of the first guide rod, and the other end is hinged to the front end of the third guide rod. One end of the third connecting rod is hinged to the left end of the second guide rod, and the other end is also hinged to the upper end of the third guide rod. One end of the first connecting rod is hinged to the left end of the second guide rod or the right end of the first guide rod, and the other end is hinged to the crank. The rotation center line of the crank is coplanar and perpendicular to the longitudinal center line of the cutter.

[0023] As a further description of the above technical solution:

[0024] The power device is fixedly installed on the frame, and the power output shaft drives the crank to rotate. The first connecting rod, the second connecting rod, the third connecting rod, the fourth connecting rod, the fifth connecting rod, the first guide rod, the second guide rod and the third guide rod are assembled with easily purchasable standard parts such as external threaded rod end joint bearings, internal threaded rod end joint bearings, external threaded Y-shaped joints, internal threaded Y-shaped joints, threaded rods, threaded sleeves and nuts, so as to reduce costs. The connecting buckle involved in the cutter bar group is L-shaped.

[0025] The present invention has the following beneficial effects:

[0026] In the present invention, by designing a five-link three-guide-rod drive mechanism, a single power source can be used to achieve the reverse reciprocating motion of the two cutter bars with a 180° phase difference, so that the inertial forces on both sides cancel each other out, achieving the effect of suppressing vibration from the root cause of dynamics. By means of a segmented design, the ultra-long cutter bar is decomposed into standardized modules, solving the problems of processing and transportation of large cutting-width components, improving the convenience and economy of maintenance, and having the advantages of expandability and compatibility. By designing the single form of the sub-protector, the soil penetration resistance is reduced, making it easier to work below the ground surface, achieving the effect of cutting weeds from the root. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The top view of a double-cutter-bar symmetric reciprocating modular cutter according to the present invention;

[0028] Figure 2 The top view of the sub-protector group according to the present invention;

[0029] Figure 3 The axonometric view of the first sub-protector according to the present invention;

[0030] Figure 4 The axonometric view of the second sub-protector according to the present invention;

[0031] Figure 5 The axonometric view of the left type-1 sub-protector group according to the present invention;

[0032] Figure 6 The axonometric view of the right type-1 sub-protector group according to the present invention;

[0033] Figure 7 The axonometric view of the general sub-protector group according to the present invention;

[0034] Figure 8 The axonometric view of the left type-2 sub-protector group according to the present invention;

[0035] Figure 9 The axonometric view of the right type-2 sub-protector group according to the present invention;

[0036] Figure 10 The left view of a double-cutter-bar symmetric reciprocating modular cutter according to the present invention;

[0037] Figure 11 The top view of the cutter-bar group according to the present invention;

[0038] Figure 12 The partial view of the connection buckle of the cutter-bar group according to the present invention;

[0039] Figure 13 The top view of the cutter according to the present invention;

[0040] Figure 14This is a top view of the drive mechanism according to the present invention.

[0041] Legend:

[0042] 1. Sub-guarding device group; 2. Tool bar group; 3. Cutter; 4. Drive mechanism; 5. Frame; 6. Power device; 7. Left tool bar group; 8. Right tool bar group; 9. First sub-guarding device; 10. Second sub-guarding device; 11. Left first-class sub-guarding device group; 12. Left second-class sub-guarding device group; 13. Right first-class sub-guarding device group; 14. Right second-class sub-guarding device group; 15. Universal sub-guarding device group; 16. Positioning pin; 17. Cutter hole on tool bar; 18. Docking card hole; 19. Installation card slot; 20. Positioning pin hole; 21. First boss; 22. Second boss; 23. Ball groove; 24. Installation bolt hole; 25. Ball; 26. Pin; 27. Left first-class tool bar; 28. Universal tool bar; 29. Left second-class tool bar; 30. Connecting buckle; 31. Left drive seat with hole; 32. Right first-class tool bar; 33. Right second-class tool bar; 34. Right drive seat with hole; 35. Cutter installation slot; 36. Pin hole; 37. Crank; 38. First connecting rod; 39. Second connecting rod; 40. Third connecting rod; 41. Fourth connecting rod; 42. Fifth connecting rod; 43. First guide rod; 44. Second guide rod; 45. Third guide rod; 46. First guide rail seat; 47. Second guide rail seat; 48. Bush; 49. Installation hole; 50. Bush hole. Detailed implementation

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0044] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "front", "rear", "axial", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0045] In the present invention, unless otherwise clearly specified and defined, the terms such as "installation", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] As Figure 1 and Figure 2 shown, the sub-protector group 1 includes a first sub-protector 9, a second sub-protector 10, a left first-class sub-protector group 11, a left second-class sub-protector group 12, a right first-class sub-protector group 13, a right second-class sub-protector group 14, a general sub-protector group 15, and a positioning pin 16.

[0047] As Figure 1 、 Figure 2 and Figure 3 shown, the first sub-protector 9 is a single sub-protector, with a front tip and a rearward shape, provided with a cutter bar cutter hole 17, a docking card hole 18, an installation card slot 19, and a positioning pin hole 20. Its width is slightly greater than twice the width of the cutter 3. It is located in the exact middle of the sub-protector group 1, is connected to the frame 5 through the installation card slot 19, and the positioning pin 16 is inserted into the positioning pin hole 20 for fixation.

[0048] As Figure 1 、 Figure 2 and Figure 4 shown, the second sub-protector 10 is also a single sub-protector, with a certain number, symmetrically distributed on both sides of the cutter. It is similar to the first sub-protector 9 in features, has the same width as the cutter 3, and has the same installation and fixation method on the frame 5 as the first sub-protector 9.

[0049] AsFigure 1 , Figure 2 , Figure 3 and Figure 5 As shown in Figure 1 , Figure 2 , Figure 3 and Figure 5 , the left first-class protector group 11 is composed of several protector monomers, and is provided with a cutter bar cutter hole 17, a first boss 21, a second boss 22, a ball groove 23, and a mounting bolt hole 24; the width of the first boss 21 is smaller than that of the second boss 22, and both are provided with positioning pin holes 20; insert the second boss 22 of the left first-class protector group 11 into the left half docking card hole 18 of the first protector 9, wait for the two positioning pin holes 20 to be coaxial, and insert the positioning pin 16 into the coaxial positioning pin holes 20 to complete the connection between the left first-class protector group 11 and the first protector 9; the left first-class protector group 11 is fixedly connected to the frame 5 by bolts through the mounting bolt holes 24.

[0050] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and , the right first-class protector group 13 is also composed of several protector monomers, and is mirror-symmetrical with the left first-class protector group 11 about the longitudinal center plane of the cutter, and is also provided with a cutter bar cutter hole 17, a first boss 21, a second boss 22, a ball groove 23, and a mounting bolt hole 24; both the first boss 21 and the second boss 22 are provided with positioning pin holes 20; insert the second boss 22 of the right first-class protector group 13 into the right half docking card hole 18 of the first protector 9, wait for the two positioning pin holes 20 to be coaxial, and insert the positioning pin 16 into the coaxial positioning pin holes 20 to complete the connection between the right first-class protector group 13 and the first protector 9; the right first-class protector group 13 is fixedly connected to the frame 5 by bolts through the mounting bolt holes 24. The first boss 21 of the left first-class protector group 11 is inserted into the right half docking card hole 18 of the second protector 10 on the left side of the cutter and is fixedly connected by the positioning pin 16, and the first boss 21 of the right first-class protector group 13 is inserted into the left half docking card hole 18 of the second protector 10 on the right side of the cutter and is fixedly connected by the positioning pin 16.

[0051] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7As shown, the general sub-protector group 15 is also composed of a number of sub-protector units, with the number being several, symmetrically distributed on both sides of the cutter. There are also arranged a cutter bar cutter hole 17, a first boss 21, a ball groove 23, a mounting bolt hole 24 and a positioning pin hole 20. Different from the left first-class sub-protector group 11 and the right first-class sub-protector group 13, the general sub-protector group 15 is a left-right symmetric structure. The first boss 21 on its left side is inserted into the right half docking card hole 18 of a second sub-protector 10, and the first boss 21 on its right side is inserted into the left half docking card hole 18 of another second sub-protector 10. The general sub-protector group 15 is fixedly connected to the frame 5 by bolts through the mounting bolt holes 24. By increasing or decreasing the number of the second sub-protectors 10 and the general sub-protector group 15, or changing the length of the general sub-protector group 15, the length of the entire sub-protector group 1 can be adjusted to meet the requirements of different cutter cutting widths.

[0052] As Figure 1 , Figure 2 , Figure 4 and Figure 8 As shown, the left second-class sub-protector group 12 is also composed of a number of sub-protector units. There are also arranged a cutter bar cutter hole 17, a first boss 21, a ball groove 23, a mounting bolt hole 24 and a positioning pin hole 20. It is located on the leftmost side of the cutter. The first boss 21 of the left second-class sub-protector group 12 is inserted into the left half docking card hole 18 of the second sub-protector 10 on the leftmost side of the cutter and is fixedly connected through the positioning pin 16, and is fixedly connected to the frame 5 by bolts through the mounting bolt holes 24.

[0053] As Figure 1 , Figure 2 , Figure 4 and Figure 9 As shown, the right second-class sub-protector group 14 is also composed of a number of sub-protector units, which is in a mirror image relationship with the left second-class sub-protector group 12 about the longitudinal center plane of the cutter. There are also arranged a cutter bar cutter hole 17, a first boss 21, a ball groove 23, a mounting bolt hole 24 and a positioning pin hole 20. It is located on the rightmost side of the cutter. The first boss 21 of the right second-class sub-protector group 14 is inserted into the right half docking card hole 18 of the second sub-protector 10 on the rightmost side of the cutter and is fixedly connected through the positioning pin 16, and is fixedly connected to the frame 5 by bolts through the mounting bolt holes 24.

[0054] As Figure 10As shown, when the first protecting device 9, the second protecting device 10, the left first-class protecting device group 11, the left second-class protecting device group 12, the right first-class protecting device group 13, the right second-class protecting device group 14, and the first boss 21 and the second boss 22 of the general protecting device group 15 are properly engaged with the docking card holes 18, the cutter bar cutting holes 17 of each component are aligned horizontally in the cutter. There are several ball grooves 23, and balls 25 are added into the ball grooves 23 to change the sliding friction into rolling friction, which plays a role in reducing the frictional resistance.

[0055] As Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the protecting device monomers of the first protecting device 9, the second protecting device 10, the left first-class protecting device group 11, the left second-class protecting device group 12, the right first-class protecting device group 13, the right second-class protecting device group 14, and the general protecting device group 15 are composed of three parts. The first part is a right trapezoid with a large bottom facing upward, and there are two through holes arranged vertically on the side, which are the cutter bar cutting hole 17 and the docking card hole 18 respectively; the second part is a triangular prism below the inclined waist surface of the right trapezoid, and the cross-section of the triangular prism is an arc-shaped isosceles triangle; the third part is a multi-faceted cone in front of the right trapezoid, and the multi-faceted cone includes two curved surfaces that are transitionally connected to the triangular prism.

[0056] As Figure 1 , Figure 10 , Figure 11 , Figure 12 , Figure 13As shown, the tool bar group 2 includes a left tool bar group 7, a right tool bar group 8, a cutter 3, and a pin 26. The left tool bar group 7 and the right tool bar group 8 are symmetrically arranged on the left and right sides of the longitudinal center plane of the cutter, and can slide left and right in the tool bar cutter hole 17. When sliding, the lower bottom surface of the tool bar group 2 contacts the outer surface of the ball 25 in the sub-protector group 1. The left tool bar group 7 includes a left type-I tool bar 27, a general tool bar 28, and a left type-II tool bar 29 from right to left. Only the left end of the left type-I tool bar 27 is provided with a connecting buckle 30. Both ends of the general tool bar 28 are provided with connecting buckles 30. Only the right end of the left type-II tool bar 29 is provided with a connecting buckle 30, and a left perforated driving seat 31 is arranged near the left end face. The right tool bar group 8 includes a right type-I tool bar 32, a general tool bar 28, and a right type-II tool bar 33 from left to right. Only the right end of the right type-I tool bar 32 is provided with a connecting buckle 30. Only the left end of the right type-II tool bar 33 is provided with a connecting buckle 30, and a right perforated driving seat 34 is arranged near the right end face. The connecting buckle 30 plays a role in connecting two components and transmitting power through surface fitting. Each component of the left tool bar group 7 and the right tool bar group 8 is connected and transmits power through the connecting buckle 30. By increasing or decreasing the number of general tool bars 28 or changing the length of the general tool bar 28, the length of the entire tool bar group 2 can be adjusted to meet the requirements of different cutter cutting widths. A number of cutter mounting grooves 35 and pin holes 36 are evenly distributed along the axis of the left type-I tool bar 27, general tool bar 28, left type-II tool bar 29, right type-I tool bar 32, and right type-II tool bar 33. A number of cutters 3 are provided with small holes 37 and are installed in the cutter mounting grooves 35. When the pin holes 36 on the tool bar group 2 are coaxial with the small holes 37 on the cutter 3, the pin 26 is inserted for fixation.

[0057] As Figure 1 , Figure 11 , Figure 14As shown in the figure, the drive mechanism 4 includes a crank 37, a first connecting rod 38, a second connecting rod 39, a third connecting rod 40, a fourth connecting rod 41, a fifth connecting rod 42, a first guide rod 43, a second guide rod 44, a third guide rod 45, a first guide rail seat 46, a second guide rail seat 47, and a sliding sleeve 48. The number of the first guide rail seats 46 is several, and they are symmetrically arranged on the left and right sides of the cutter in the front, and two mounting holes 49 and a sliding sleeve hole 50 are arranged thereon. The central connection line of the mounting holes 49 and the central axis line of the sliding sleeve hole 50 are vertically inclined intersection lines in space, and they are fixedly connected to the frame 5 through bolts. After installation, the central axis lines of the sliding sleeve holes 50 of all the first guide rail seats 46 are collinear along the horizontal direction; the number of the second guide rail seats 47 is several, and they are arranged on the cutter in the back, and two mounting holes 49 and a sliding sleeve hole 50 are also arranged thereon. The central connection line of the mounting holes 49 and the central axis line of the sliding sleeve hole 50 are also vertically inclined intersection lines in space, and they are fixedly connected to the frame 5 through bolts. After installation, the central axis lines of the sliding sleeve holes 50 of all the second guide rail seats 47 are collinear along the vertical direction; the sliding sleeve 48 is installed in the sliding sleeve holes 50 of the first guide rail seat 46 and the second guide rail seat 47 by interference fit; the first guide rod 43 is installed in the sliding sleeve 48 on the left front side of the cutter, the second guide rod 44 is installed in the sliding sleeve 48 on the right front side of the cutter, the third guide rod 45 is installed in the sliding sleeve 48 on the back side of the cutter, and the first guide rod 43, the second guide rod 44, and the third guide rod 45 can all slide along the axis direction of the corresponding sliding sleeve 48; one end of the fourth connecting rod 41 is fixedly connected to the left belt hole drive seat 31 on the left cutter bar group 7, and the other end is fixedly connected to the left end of the first guide rod 43; one end of the fifth connecting rod 42 is fixedly connected to the right belt hole drive seat 34 on the right cutter bar group 8, and the other end is fixedly connected to the right end of the second guide rod 44; one end of the second connecting rod 39 is hinged to the right end of the first guide rod 43, and the other end is hinged to the front end of the third guide rod 40; one end of the third connecting rod 40 is hinged to the left end of the second guide rod 44, and the other end is also hinged to the upper end of the third guide rod 45; one end of the first connecting rod 38 is hinged to the left end of the second guide rod 44 or the right end of the first guide rod 43, and the other end is hinged to the crank 37. The rotation center line of the crank 37 is coplanar and perpendicular to the longitudinal center line of the cutter.

[0058] As Figure 10 shown, the power device 6 is fixedly installed on the frame 5, and the power output shaft drives the crank 37 to make a rotational motion.

[0059] As Figure 14As shown, the first connecting rod 38, the second connecting rod 39, the third connecting rod 40, the fourth connecting rod 41, the fifth connecting rod 42, the first guide rod 43, the second guide rod 44 and the third guide rod 45 are assembled with easily purchasable standard parts such as external threaded rod end spherical bearings, internal threaded rod end spherical bearings, external threaded Y-type joints, internal threaded Y-type joints, threaded rods, threaded sleeves and nuts, so as to reduce costs.

[0060] As Figure 11 and Figure 12 shown, the connecting buckle 30 involved in the tool bar group 2 is "L"-shaped.

[0061] As Figure 1 and Figure 10 shown, the power device 6 is a motor.

[0062] Taking the clockwise rotation of the crank 37 and the hinged connection between one end of the first connecting rod 38 and the left end of the second guide rod 44 as an example, the working principle of the present invention is as Figure 14 shown: The clockwise rotation of the crank 37 drives the second guide rod 44 to reciprocate. When the second guide rod 44 moves to the right, it drives the third guide rod 45 to move upward through the third connecting rod 40. At the same time, the third guide rod 45 pushes the first guide rod 43 to move to the left through the second connecting rod 39; when the second guide rod 44 moves to the left, it pushes the third guide rod 45 to move downward through the third connecting rod 40. At the same time, the third guide rod 45 pulls the first guide rod 43 to move to the right through the second connecting rod 39, so as to realize the symmetrical reciprocating motion of the first guide rod 43 and the second guide rod 44. Since the first guide rod 43 is connected to the left tool bar group 7 through the fourth connecting rod 41 and the second guide rod 44 is connected to the right tool bar group 8 through the fifth connecting rod 42, the cutting knives 3 on both sides of the cutter make symmetrical reciprocating motions in opposite directions, so that the inertial forces on both sides of the cutter cancel each other out, and vibration is suppressed from the dynamic source.

[0063] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-knife-bar symmetric reciprocating modular cutter, comprising a sub-protector group (1), a knife-bar group (2), a cutter (3), a driving mechanism (4), a frame (5) and a power device (6), characterized in that: The sub-protector group (1) is installed on the front side of the frame (5). The cutter bar group (2) consists of a left cutter bar group (7) and a right cutter bar group (8) distributed on both sides of the cutter. A number of cutter blades (3) are fixedly installed at the tops of the left cutter bar group (7) and the right cutter bar group (8). The cutter bar group (7) is slidably connected to the sub-protector group (1). The sub-protector group (1) includes a first sub-protector (9), a second sub-protector (10), a left first-class sub-protector group (11), a left second-class sub-protector group (12), a right first-class sub-protector group (13), a right second-class sub-protector group (14), a general sub-protector group (15), and a positioning pin (16). The first sub-protector (9) is a single sub-protector, with a pointed front and a rearward shape, and is provided with a cutter bar and cutter blade hole (17), a docking card hole (18), an installation card slot (19), and a positioning pin hole (20). Its width is slightly larger than twice the width of the cutter blade (3). It is located in the exact middle of the sub-protector group (1), and is connected to the frame (5) through the installation card slot (19), and the positioning pin (16) is inserted into the positioning pin hole (20) for fixation.

2. The double-knife-bar symmetric reciprocating modular cutter according to claim 1, wherein: The second sub-protector (10) is also a single sub-protector, with a number of them symmetrically distributed on both the left and right sides of the cutter. It is similar in characteristics to the first sub-protector (9), and its width is the same as the width of the cutter blade (3). Its installation and fixation method on the frame (5) is the same as that of the first sub-protector (9). The left first-class sub-protector group (11) consists of a number of single sub-protectors, and is provided with a cutter bar and cutter blade hole (17), a first boss (21), a second boss (22), a ball groove (23), and an installation bolt hole (24). The width of the first boss (21) is smaller than that of the second boss (22), and both are provided with positioning pin holes (20). Insert the second boss (22) of the left first-class sub-protector group (11) into the left half docking card hole (18) of the first sub-protector (9). When the two positioning pin holes (20) are coaxial, insert the positioning pin (16) into the coaxial positioning pin holes (20) to complete the connection between the left first-class sub-protector group (11) and the first sub-protector (9). The left first-class sub-protector group (11) is tightly connected to the frame (5) by bolts through the installation bolt holes (24).

3. The double cutter bar symmetric reciprocating modular cutter according to claim 1, characterized in that: The right first-class protector group (13) is also composed of several protector units, which is in a mirror image relationship with the left first-class protector group (11) about the longitudinal center plane of the cutter. The cutter bar cutter holes (17), the first bosses (21), the second bosses (22), the ball grooves (23), and the mounting bolt holes (24) are also arranged. The positioning pin holes (20) are arranged on both the first bosses (21) and the second bosses (22). Insert the second boss (22) of the right first-class protector group (13) into the right half docking card hole (18) of the first protector (9). When the two positioning pin holes (20) are coaxial, insert the positioning pin (16) into the coaxial positioning pin holes (20) to complete the connection between the right first-class protector group (13) and the first protector (9). The right first-class protector group (13) is fixedly connected to the frame (5) by bolts through the mounting bolt holes (24). The first boss (21) of the left first-class protector group (11) is inserted into the right half docking card hole (18) of the second protector (10) on the left side of the cutter and is fixedly connected through the positioning pin (16). The first boss (21) of the right first-class protector group (13) is inserted into the left half docking card hole (18) of the second protector (10) on the right side of the cutter and is fixedly connected through the positioning pin (16).

4. A double cutter bar symmetric reciprocating modular cutter according to claim 1, characterized in that: The general protector group (15) is also composed of several protector units, with a certain number, symmetrically distributed on both the left and right sides of the cutter. The cutter bar cutter holes (17), the first bosses (21), the ball grooves (23), the mounting bolt holes (24), and the positioning pin holes (20) are also arranged. Different from the left first-class protector group (11) and the right first-class protector group (13), the general protector group (15) has a left-right symmetric structure. The first boss (21) on its left side is inserted into the right half docking card hole (18) of a second protector (10), and the first boss (21) on its right side is inserted into the left half docking card hole (18) of another second protector (10). The general protector group (15) is fixedly connected to the frame (5) by bolts through the mounting bolt holes (24). By increasing or decreasing the number of the second protectors (10) and the general protector groups (15), or changing the length of the general protector group (15), the length of the entire protector group (1) can be adjusted to meet the requirements of different cutter cutting widths.

5. A double-knife-bar symmetric reciprocating modular cutter according to claim 1, characterized in that: The left second-class protector group (12) is also composed of several protector units. The cutter bar cutter holes (17), the first bosses (21), the ball grooves (23), the mounting bolt holes (24), and the positioning pin holes (20) are also arranged. It is located on the leftmost side of the cutter. Insert the first boss (21) of the left second-class protector group (12) into the left half docking card hole (18) of the second protector (10) on the leftmost side of the cutter and is fixedly connected through the positioning pin (16). It is fixedly connected to the frame (5) by bolts through the mounting bolt holes (24).

6. The double-knife-bar symmetric reciprocating modular cutter according to claim 1, characterized in that: The right second-class guard group (14) is also composed of several guard monomers, which is in a mirror image relationship with the left second-class guard group (12) with respect to the longitudinal center plane of the cutter. The cutter bar cutter holes (17), the first bosses (21), the ball grooves (23), the mounting bolt holes (24) and the positioning pin holes (20) are also arranged. It is located on the rightmost side of the cutter. Insert the first boss (21) of the right second-class guard group (14) into the right half docking card hole (18) of the second guard (10) on the rightmost side of the cutter, and fix and connect it through the positioning pin (16). A bolt is used to tightly connect with the frame (5) through the mounting bolt hole (24).

7. A double-knife-bar symmetric reciprocating modular cutter according to claim 1, characterized in that: When the first bosses (21) and the second bosses (22) of the first guard (9), the second guard (10), the left first-class guard group (11), the left second-class guard group (12), the right first-class guard group (13), the right second-class guard group (14) and the universal guard group (15) are in place in cooperation with the docking card holes (18), the cutter bar cutter holes (17) of each component are arranged in alignment in the transverse direction of the cutter. There are several ball grooves (23). Add balls (25) into the ball grooves (23) to change the sliding friction into rolling friction, which plays a role in reducing the frictional resistance. The guard monomers of the first guard (9), the second guard (10), the left first-class guard group (11), the left second-class guard group (12), the right first-class guard group (13), the right second-class guard group (14) and the universal guard group (15) are composed of three parts. The first part is a right trapezoid with a large bottom facing up, and there are two through holes arranged vertically on the side, which are the cutter bar cutter hole (17) and the docking card hole (18) respectively; the second part is a triangular prism below the inclined waist surface of the right trapezoid, and the cross section of the triangular prism is an arc-shaped isosceles triangle; the third part is a polyhedral cone in front of the right trapezoid, and the polyhedral cone includes two curved surfaces that are transitionally connected to the triangular prism.

8. A double-knife-bar symmetric reciprocating modular cutter according to claim 1, characterized in that: The cutter bar group (2) includes a left cutter bar group (7), a right cutter bar group (8), a cutter (3), and a pin (26). The left cutter bar group (7) and the right cutter bar group (8) are symmetrically arranged on the left and right sides of the longitudinal center plane of the cutter, and can slide left and right in the cutter bar cutter hole (17). When sliding, the lower bottom surface of the cutter bar group (2) contacts the outer surface of the ball (25) in the sub-protector group (1). The left cutter bar group (7) includes a left type I cutter bar (27), a general cutter bar (28), and a left type II cutter bar (29) from right to left. The left type I cutter bar (27) has a connection buckle (30) only at the left end. The general cutter bar (28) has connection buckles (30) at both ends. The left type II cutter bar (29) has a connection buckle (30) only at the right end and has a left perforated drive seat (31) near the left end face. The right cutter bar group (8) includes a right type I cutter bar (32), a general cutter bar (28), and a right type II cutter bar (33) from left to right. The right type I cutter bar (32) has a connection buckle (30) only at the right end. The right type II cutter bar (33) has a connection buckle (30) only at the left end and has a right perforated drive seat (34) near the right end face. The connection buckle (30) plays a role in connecting two components and transmitting power through surface matching. The components of the left cutter bar group (7) and the right cutter bar group (8) are connected and transmit power through the connection buckle (30). By increasing or decreasing the number of the general cutter bars (28) or changing the length of the general cutter bars (28), the length of the entire cutter bar group (2) can be adjusted to meet the requirements of different cutter widths of the cutter. The left type I cutter bar (27), the general cutter bar (28), the left type II cutter bar (29), the right type I cutter bar (32), and the right type II cutter bar (33) are evenly distributed with a number of cutter mounting grooves (35) and pin holes (36) at certain intervals along the axial direction. There are several cutters (3) with small holes (37) arranged thereon, which are installed in the cutter mounting grooves (35). When the pin holes (36) on the cutter bar group (2) are coaxial with the small holes (37) on the cutter (3), the pin (26) is inserted for fixation.

9. The double-knife-bar symmetric reciprocating modular cutter according to claim 1, characterized in that: The driving mechanism (4) includes a crank (37), a first connecting rod (38), a second connecting rod (39), a third connecting rod (40), a fourth connecting rod (41), a fifth connecting rod (42), a first guide rod (43), a second guide rod (44), a third guide rod (45), a first guide rail seat (46), a second guide rail seat (47) and a sliding sleeve (48). The number of the first guide rail seats (46) is several, which are symmetrically arranged at the front left and right sides of the cutter, and there are two mounting holes (49) and a sliding sleeve hole (50) arranged thereon. The central connection line of the mounting holes (49) and the central axis line of the sliding sleeve hole (50) are vertically inclined intersection lines in space, and are fixedly connected to the frame (5) through bolts. After installation, the central axis lines of the sliding sleeve holes (50) of all the first guide rail seats (46) are collinear along the horizontal direction; the number of the second guide rail seats (47) is several, which are arranged at the rear of the cutter, and there are also two mounting holes (49) and a sliding sleeve hole (50) arranged thereon. The central connection line of the mounting holes (49) and the central axis line of the sliding sleeve hole (50) are also vertically inclined intersection lines in space, and are fixedly connected to the frame (5) through bolts. After installation, the central axis lines of the sliding sleeve holes (50) of all the second guide rail seats (47) are collinear along the vertical direction; the sliding sleeve (48) is installed in the sliding sleeve holes (50) of the first guide rail seat (46) and the second guide rail seat (47) by interference fit; the first guide rod (43) is installed in the sliding sleeve (48) on the front left side of the cutter, the second guide rod (44) is installed in the sliding sleeve (48) on the front right side of the cutter, the third guide rod (45) is installed in the sliding sleeve (48) on the rear side of the cutter, and the first guide rod (43), the second guide rod (44) and the third guide rod (45) can all slide along the axial direction of the corresponding sliding sleeve (48); one end of the fourth connecting rod (41) is fixedly connected to the left hole-driving seat (31) on the left cutter bar group (7), and the other end is fixedly connected to the left end of the first guide rod (43); one end of the fifth connecting rod (42) is fixedly connected to the right hole-driving seat (34) on the right cutter bar group (8), and the other end is fixedly connected to the right end of the second guide rod (44); one end of the second connecting rod (39) is hinged to the right end of the first guide rod (43), and the other end is hinged to the front end of the third guide rod (40); one end of the third connecting rod (40) is hinged to the left end of the second guide rod (44), and the other end is also hinged to the upper end of the third guide rod (45); one end of the first connecting rod (38) is hinged to the left end of the second guide rod (44) or the right end of the first guide rod (43), and the other end is hinged to the crank (37); the rotation center line of the crank (37) is coplanar and perpendicular to the longitudinal center line of the cutter.

10. The double-knife-bar symmetric reciprocating modular cutter according to claim 1, wherein: The power device (6) is fixedly installed on the frame (5), and the power output shaft drives the crank (37) to rotate. The first connecting rod (38), the second connecting rod (39), the third connecting rod (40), the fourth connecting rod (41), the fifth connecting rod (42), the first guide rod (43), the second guide rod (44) and the third guide rod (45) are assembled with easily purchasable standard parts such as external threaded rod end spherical bearings, internal threaded rod end spherical bearings, external threaded Y-shaped joints, internal threaded Y-shaped joints, threaded rods, threaded sleeves and nuts, etc. to reduce costs. The connecting buckle (30) involved in the tool bar group (2) is L-shaped.

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