Bottom bin cutter device of large square bale picking and baling machine

Abstract

The invention discloses a bottom bin cutter device of a large square bale picking and baling machine. The bottom bin cutter device comprises a bottom bin frame. The cutter mechanism comprises a cutter seat, a cutter shaft and a cutter; the cutter seat is connected to the bottom bin frame in a push-pull mode and fastened through a locking piece. The cutter shaft is fixed to the front ends of the baffles on the two sides of the cutter base. The front end of the cutter is rotationally connected with the cutter shaft; the cutter adjusting mechanism comprises a first oil cylinder and a second oil cylinder; a cylinder body of the first oil cylinder is hinged to the baffle, and a piston rod is in transmission connection with the odd-number cutters through a first transmission piece. A cylinder body of the second oil cylinder is hinged to the baffle, and a piston rod is in transmission connection with the even-numbered cutters through a second transmission piece. The first oil cylinder and the second oil cylinder are used for controlling the actions of the cutters at the odd number and the even number respectively, the working number of the cutters can be adjusted, switching of the cutting lengths of different grass materials is achieved through multiple postures, and the picking and baling operation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of agriculture and animal husbandry, and more particularly to a bottom bin cutting device of a large square straw bale picking and baling machine. Background Art

[0002] Large square bale picking and baling machines are the core equipment for harvesting, picking and baling grass in my country's agricultural and animal husbandry fields. They undertake the key task of converting loose grass into standard rectangular bales. Through a series of processes such as picking, feeding, compressing and baling, they achieve efficient collection and storage of grass. Among them, the large square bale picking and baling machine equipped with a bottom bin cutter device can cut the grass material according to the agronomic storage technical requirements of different grass materials, so that the grass material enters the compression chamber evenly, making the bale density uniform and the bale shape square, and preventing the feeding system from being blocked, thereby improving the baling operation efficiency; at the same time, the hydraulic buffer structure of the bottom bin cutter device can effectively prevent the cutter and other parts from being overloaded and damaged, thereby playing the role of buffering and overload protection.

[0003] Currently, most large-scale square bale balers on the market have technical flaws in their bottom bin cutter mechanisms. Adjustment of the cutter length is largely manual, a time-consuming process that makes it difficult to quickly respond to the diverse cut length requirements of different straw materials, limiting the machine's operational flexibility and efficiency. Furthermore, the cutter's overload protection mechanism is flawed. When encountering hard objects such as rocks, there's a lack of effective buffering and overload protection, which can easily lead to cutter breakage and component damage. This increases machine downtime and maintenance costs, impacting machine efficiency.

[0004] Therefore, how to provide a bottom bin cutter device for a large square straw bale picking and baling machine with automatic control, precise cutting and efficient protection mechanism is a problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] In view of this, the present invention provides a bottom bin cutter device for a large square straw bale picking and baling machine and a method for using the same. The cutter oil cylinder accurately adjusts and controls the number of cutter operations in the bottom bin, and can switch between three cutting lengths according to the cutting process requirements of non-grass materials, thereby improving the efficiency of picking and baling operations. At the same time, an energy storage buffer is installed in series in the hydraulic circuit of the device's cutter oil cylinder. When the cutter encounters hard objects such as stones, the cutting force is overloaded. Under the buffering operation of the accumulator, the cutter is pressed back to avoid damage to the cutter due to overload, thereby playing an overload protection role.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A bottom bin cutting device for a large square straw bale picking and baling machine, comprising:

[0008] Bottom shelf,

[0009] The cutter mechanism includes a cutter seat, a cutter shaft, and a cutter; the cutter seat is push-pull connected to the bottom frame and fastened by a locking member; the cutter shaft is fixed to the front end of the baffles on both sides of the cutter seat; the front end of the cutter is rotatably connected to the cutter shaft;

[0010] The cutter adjustment mechanism includes a first oil cylinder and a second oil cylinder; the cylinder body of the first oil cylinder is hinged to the baffle on one side of the cutter seat, and the piston rod is connected to the odd-numbered cutters through a first transmission member; the cylinder body of the second oil cylinder is hinged to the baffle on the other side of the cutter seat, and the piston rod is connected to the even-numbered cutters through a second transmission member.

[0011] The beneficial effect of the technical solution of the present invention is that the first cylinder and the second cylinder respectively control the movements of the odd-numbered and even-numbered cutters, thereby adjusting the working quantity of the cutters, realizing the switching of the cutting lengths of different grass materials through multiple postures, and improving the efficiency of picking and baling operations.

[0012] Preferably, the first transmission member includes a first crank arm, a fixed shaft, and a first transmission plate. The first crank arms are multiple, and their front ends are detachably connected to the rear ends of the odd-numbered cutters in a one-to-one correspondence. The fixed shaft is fixed to the rear ends of the multiple first crank arms. The rear end of the first transmission plate is fixed to one end of the fixed shaft, and its front end is hinged to the piston rod of the first oil cylinder. The fixed shaft is connected to the first crank arm, and the first oil cylinder drives the first transmission plate, which can raise or lower the fixed shaft, thereby extending and retracting the odd-numbered cutters.

[0013] Preferably, the second transmission member includes a second crank arm, a rotating shaft, and a second transmission plate; the length of the second crank arm is less than that of the first crank arm; there are multiple second crank arms, and the multiple second crank arms are placed one-to-one between two adjacent first crank arms, and their front ends are detachably connected to the rear ends of the even-numbered cutters; the two ends of the rotating shaft are rotatably connected to the two baffles, the rotating shaft passes through the first crank arm and can rotate relative to each other; the rotating shaft is fixed to the rear ends of the multiple second crank arms; the rear end of the second transmission plate is fixed to one end of the rotating shaft, and the front end is hinged to the piston rod of the second oil cylinder. When the first oil cylinder extends and the second oil cylinder retracts, the first crank arm can rotate around the rotating shaft, the odd-numbered cutters extend, and the even-numbered cutters do not extend; when the second oil cylinder extends, the second transmission plate drives the rotating shaft to rotate, and then drives the second crank arm to move the even-numbered cutters to extend.

[0014] Preferably, the bottom bin frame includes a front crossbeam and a rear crossbeam spaced parallel to each other, a locking plate welded to the rear crossbeam, and the cutter seat is positioned between opposing side walls of the front and rear crossbeams. The locking member includes a locking plate and a locating pin, the locking plate welded to the rear crossbeam. The locating pin passes through a locating hole in the locking plate and abuts against the baffle to lock the cutter seat. The detachable connection between the cutter seat and the rear crossbeam facilitates maintenance of the cutter assembly.

[0015] Preferably, rollers are rotatably connected to the ends of the two opposite side walls of the front and rear crossbeams, and the cutter seat can be rolled along the front and rear crossbeams via the rollers. The cutter seat is easy to install and remove by a push-pull rolling method, and is convenient for maintenance and replacement of the cutter assembly.

[0016] Preferably, the invention further comprises two cross beam arms, the two ends of the two cross beam arms are fixed to the top surfaces of the front cross beam and the rear cross beam respectively, and the front and rear cross beams are connected by the cross beam arms to ensure the integrity of the bottom bin frame.

[0017] Preferably, the bottom bin pin is further included, the bottom bin pin passing through the front ends of the cross beam arm and the bottom bin cover in sequence; the bottom bin pin is rotatable relative to the cross beam arm and the bottom bin cover; the rear end of the bottom bin cover is fixed to the rear end of the assembly plate via a connecting plate. The bottom bin pin is used to achieve an articulated connection between the bottom bin cover and the cross beam arm relative to the assembly plate.

[0018] Preferably, the invention further comprises a bottom bin adjustment mechanism, wherein the bottom bin adjustment mechanism comprises an assembly plate and a bottom bin oil cylinder; the number of the assembly plates is two and they are respectively arranged at both ends of the bottom bin frame; the bottom bin cover and the cross beam arm are symmetrically arranged relative to the two sides of the assembly plate; the lower end of the assembly plate is provided with a groove for accommodating the baffle; the cylinder body of the bottom bin oil cylinder is hinged to the panel of the assembly plate, and the piston rod is hinged to the rear end of the cross beam arm. Since the front end of the bottom bin cover is connected to the bottom bin frame and the cross beam arm through the bottom bin pin, and the rear end is fixed to the assembly plate through a connecting plate, when the bottom bin oil cylinder is pushed out and downward, the bottom bin cover does not move, and the bottom bin frame drives the cutter seat to rotate downward around the bottom bin pin, thereby increasing the angle between the bottom bin cover and the cutter seat, and there is sufficient operating space for replacing the cutter or cleaning the bottom bin, which is convenient for personnel operation; when the bottom bin oil cylinder is retracted, the bottom bin frame drives the cutter seat to return to the working position.

[0019] Preferably, a cutter overload protection mechanism is further included, and the cutter overload protection mechanism is fixed to the hydraulic pipeline of the first oil cylinder and the second oil cylinder to protect the cutter from overload. The cutter overload protection mechanism protects the cutter from overload, thereby improving the overall performance of the bottom bin device.

[0020] It can be seen from the above technical solution that compared with the prior art, the present invention provides a bottom bin cutter device for a large square grass bale picking and baling machine and a method for using the same. It adopts a hydraulically controlled crank-connecting rod structure, which can quickly switch the cutter state, is convenient to adjust, and is easy to operate. When picking and baling operations are performed, the user can accurately adjust the number of cutter operations in the bottom bin by controlling the telescopic operation of the first cylinder and the second cylinder according to the different grass materials, thereby realizing the switching of three cutting lengths of grass materials. At the same time, an energy storage buffer is installed in series in the circuits of the first cylinder and the second cylinder. When the cutter encounters hard objects such as stones, the cutter is buffered and pressed back under the buffering operation of the cutter overload protection mechanism, avoiding damage to the cutter due to overload, playing an overload protection role, preventing damage to the cutter device, and improving the efficiency of picking and baling operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 A schematic structural diagram of the bottom bin cutter device provided by the present invention;

[0023] Figure 2 A front view of the bottom bin cutter device provided by the present invention;

[0024] Figure 3 A top view of the bottom bin cutter device provided by the present invention;

[0025] Figure 4 A bottom view of the bottom bin cutter device provided by the present invention;

[0026] Figure 5 This is a left view of the bottom bin cutter device provided by the present invention;

[0027] Figure 6 This is a right side view of the bottom bin cutter device provided by the present invention;

[0028] Figure 7 This is a front view of the odd-numbered digit cutter provided by the present invention after being extended;

[0029] Figure 8 for Figure 7 Schematic diagram of the first oil cylinder structure in the state;

[0030] Figure 9 for Figure 7 A cross-sectional view of the first crank arm in the state;

[0031] Figure 10A front view of the cutter provided by the present invention after it is fully extended;

[0032] Figure 11 for Figure 10 Schematic diagram of the structure of the second oil cylinder in the state;

[0033] Figure 12 for Figure 10 A cross-sectional view of the second crank arm in the state;

[0034] Figure 13 A front view of the cutter provided by the present invention after it is fully retracted;

[0035] Figure 14 for Figure 13 Schematic diagram of the first oil cylinder structure in the state;

[0036] Figure 15 for Figure 13 A cross-sectional view of the first crank arm in the state;

[0037] Figure 16 for Figure 13 Schematic diagram of the structure of the second oil cylinder in the state;

[0038] Figure 17 for Figure 13 Cross-sectional view of the second crank arm in this state.

[0039] in,

[0040] 1- bottom shelf; 11- front crossbeam; 12- rear crossbeam; 13- crossbeam arm; 14- roller;

[0041] 2-cutter mechanism; 21-bottom bin cover; 22-cutter; 23-cutter seat; 24-cutter shaft; 25-connecting plate; 26-locking pin plate; 27-locating pin; 28-cutter shaft locking pin;

[0042] 3-cutter adjustment mechanism; 31-fixed shaft; 32-first crank arm; 33-first transmission plate; 34-rotating shaft; 35-second crank arm; 36-second transmission plate; 37-first oil cylinder; 38-second oil cylinder; 39-hydraulic pipeline;

[0043] 4-cutter overload protection mechanism; 41-first energy storage buffer; 42-second energy storage buffer;

[0044] 5- bottom bin pin;

[0045] 6- bottom bin adjustment mechanism; 61- assembly plate; 62- bottom bin oil cylinder; 63- first connecting pin; 64- second connecting pin. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] Example 1:

[0048] Participate in the Figures 1 to 6 The embodiment of the present invention discloses a bottom bin cutting device of a large square straw bale picking and baling machine, comprising:

[0049] Bottom shelf 1,

[0050] The cutter mechanism 2 includes a cutter seat 23, a cutter shaft 24, a cutter 22, and a bottom bin cover 21. The cutter seat 23 is push-pull connected to the bottom bin frame 1 and fastened by a locking member. The cutter shaft 24 is fixed to the front ends of the two cutter seats 23. The front ends of the cutters 22 are rotatably connected to the cutter shaft 24. The bottom bin cover 21 covers the top surface of the bottom bin frame 1. The bottom bin cover 21 is provided with a plurality of knife slots for the extension and retraction of the cutters 22.

[0051] The cutter adjustment mechanism 3 includes a first oil cylinder 37 and a second oil cylinder 38; the cylinder body of the first oil cylinder 37 is hinged to the baffle on one side of the cutter seat 23, and the piston rod is connected to the odd-numbered cutters 22 through a first transmission member; the cylinder body of the second oil cylinder 38 is hinged to the baffle on the other side of the cutter seat 23, and the piston rod is connected to the even-numbered cutters 22 through a second transmission member.

[0052] In order to further optimize the above technical solution, the first cylinder and the second cylinder are both hydraulic cylinders, which use hydraulic pressure to drive the movement of the first transmission member and the second transmission member, thereby changing the number of operations of the cutter and realizing multiple cutting modes for grass materials in different postures.

[0053] In this embodiment, the first transmission member includes a first crank arm 32, a fixed shaft 31 and a first transmission plate 33; there are multiple first crank arms 32 and their front ends are detachably connected to the rear ends of the odd-numbered cutters 22 in a one-to-one correspondence; the fixed shaft 31 is fixed to the rear ends of the multiple first crank arms 32; the rear end of the first transmission plate 33 is fixed to one end of the fixed shaft 31, and the front end is hinged to the piston rod of the first cylinder 37.

[0054] The rear ends of the multiple first crank arms are connected through a fixed shaft, and the front ends are engaged with the cutters. When the first oil cylinder extends, it will drive the fixed shaft and the rear ends of the odd-numbered cutters to move downward, and the odd-numbered cutters extend out of the knife groove of the bottom bin cover to cut medium-length grass materials.

[0055] In this embodiment, the second transmission member includes a second crank arm 35, a rotating shaft 34 and a second transmission plate 36; the length of the second crank arm 35 is less than the length of the first crank arm 32; there are multiple second crank arms 35, and the multiple second crank arms 35 are placed one-to-one between two adjacent first crank arms 32 and their front ends are detachably connected to the rear ends of the even-numbered cutters 22; the two ends of the rotating shaft 34 are rotatably connected to the two baffles, the rotating shaft 34 passes through the first crank arm 32 and the two can rotate relative to each other; the rotating shaft 34 is fixed to the rear ends of the multiple second crank arms 35; the rear end of the second transmission plate 36 is fixed to one end of the rotating shaft 34, and the front end is hinged to the piston rod of the second oil cylinder 38.

[0056] The rear ends of multiple first crank arms are sleeved on the fixed shaft, and the rear end of the first transmission plate is fixed to one end of the fixed shaft, and the first crank arm and the first transmission plate are fastened to the fixed shaft by bolts; the fixed shaft is arranged parallel to the rotating shaft, and the rotating shaft is located at the front end of the fixed shaft relative to the bottom bin frame; the two ends of the rotating shaft are rotatably connected to the baffles on both sides of the cutter seat, and the rear ends of multiple second crank arms are sleeved on the rotating shaft, and the rear end of the second transmission plate is fixed at the end of the rotating shaft relative to the fixed shaft away from the first transmission plate, and the second crank arm and the second transmission plate are fastened to the rotating shaft by bolts; the front end of the cutter is rotatably connected to the cutter shaft, and the rear end is clamped with the rotating shaft on the front ends of the first crank arm and the second crank arm, and the cutter extends or retracts through the knife groove above the bottom bin cover.

[0057] The rotating shaft passes through the second crank arm and is fixed thereto. The rotating shaft passes through the first crank arm and can rotate relative to the first crank arm. When the first oil cylinder extends, the fixed shaft drives the first drive arm to rotate relative to the rotating shaft. At this time, the odd-numbered cutters extend; when the second oil cylinder extends, the second transmission plate can drive the rotating shaft to rotate around the cutter seat, thereby causing the front end of the second crank arm to drive the even-numbered cutters to rotate around the cutter shaft and extend out of the knife groove. At this time, all the cutters are extended, and short grass materials can be cut.

[0058] This embodiment adopts a hydraulically controlled crank-connecting rod structure, which can quickly switch the cutter status and is convenient to adjust and easy to operate. When picking and baling operations are performed, the user can accurately adjust the number of cutter operations in the bottom bin by controlling the extension and retraction operations of the first cylinder and the second cylinder according to the different grass materials, thereby realizing the switching of three cutting lengths of grass materials.

[0059] In order to further optimize the above technical solution and facilitate the maintenance and replacement of the cutter, a front slot is provided at the lower front end of the cutter, and the cutter shaft is rotatably connected in the front slot. A rear slot is provided at the rear of the cutter, and the rear slot is connected to the hinge shaft at the front end of the first crank arm and the second crank arm. A crank-connecting rod mechanism is used to realize the rotation of the cutter, and the cutter can be easily disassembled through the slot.

[0060] In order to further optimize the above technical solution, Figure 6 As shown, the front ends of the baffles on both sides of the cutter seat 23 are provided with embedding holes, and the two ends of the cutter shaft 24 are plugged and fixed in the embedding holes. The end of the cutter shaft 24 is fixed with a locking plate that is arranged in conjunction with the baffle. The lock shaft pin 28 passes through the locking plate and the locking holes on the baffle in sequence to lock the cutter shaft 24, preventing the cutter shaft 24 from rotating relative to the baffles on both sides of the cutter seat 23.

[0061] In order to further optimize the above technical solution, bearings are embedded in the baffles on both sides of the cutter seat, and the two ends of the rotating shaft are interference fit with the inner ring of the bearing, and the bearings are used to realize the rotation of the rotating shaft relative to the baffle.

[0062] In this embodiment, the bottom bin frame 1 includes a front crossbeam 11 and a rear crossbeam 12 arranged in parallel with a front-to-back interval, and the cutter seat 23 is placed between the two opposite side walls of the front crossbeam 11 and the rear crossbeam 12; the locking part includes a locking pin plate 26 and a positioning pin 27, the locking pin plate 26 is welded to the rear crossbeam 12, and the positioning pin 27 passes through the positioning hole of the locking pin plate 26 and abuts against the baffle to lock the cutter seat 23.

[0063] The cutter seat is connected to the front and rear crossbeams in a push-pull manner. The cutter seat baffle is fastened to the rear crossbeam using a positioning pin and a locking pin plate, which can limit the push and pull of the cutter seat. When the cutter seat needs to be repaired and maintained, the positioning pin can be removed and it can be pulled out along the front and rear crossbeams.

[0064] To further optimize the above technical solution, rollers 14 are rotatably connected to the ends of the opposite side walls of the front crossbeam 11 and the rear crossbeam 12, and the cutter seat 23 can be rolled along the front crossbeam 11 and the rear crossbeam 12 via the rollers 14. The push-pull rolling method facilitates the installation and removal of the cutter seat and facilitates the maintenance and replacement of the cutter assembly. The cutter seat can be locked using a locking plate and a positioning pin to prevent it from sliding along the front crossbeam and the rear crossbeam during use.

[0065] The bottom silo also includes two crossbeam arms 13, each of which is fixed at both ends to the top surfaces of the front crossbeam 11 and the rear crossbeam 12. One end of the crossbeam arm is welded to the rear crossbeam, and the other end is connected to the front crossbeam via a fastener. The crossbeam arms connect the front and rear crossbeams to form an integrated bottom silo frame structure.

[0066] In order to further optimize the above technical solution, it also includes a bottom bin pin shaft 5, which passes through the front end of the cross beam arm 13 and the bottom bin cover 21 in sequence; the bottom bin pin shaft 5 can rotate relative to the cross beam arm 13 and the bottom bin cover 21; the rear end of the bottom bin cover 21 is fixed to the rear end of the assembly plate 61 through the connecting plate 25.

[0067] In order to further optimize the above technical solution, it also includes a bottom bin adjustment mechanism 6, which includes an assembly plate 61 and a bottom bin cylinder 62; there are two assembly plates 61 and they are respectively arranged at both ends of the bottom bin frame 1; the bottom bin cover 21 and the crossbeam arm 13 are arranged symmetrically on both sides of the assembly plate 61; the lower end of the assembly plate 61 is provided with a groove for accommodating the cutter seat 23; the cylinder body of the bottom bin cylinder 62 is hinged to the panel of the assembly plate 61, and the piston rod is hinged to the rear end of the crossbeam arm 13.

[0068] like Figure 5 and 6 As shown, the front end of the bottom bin cover 21 and the cross beam arm 13 are hinged relative to the assembly plate 61 through the bottom bin pin 5, that is, the bottom bin cover 21 and the cross beam arm 13 are connected by the bottom bin pin 5 and the bottom bin pin 5 can rotate along it;

[0069] The cylinder body of the bottom tank oil cylinder 62 and the panel of the assembly plate 61 are hinged through a first connecting pin 63 , and the piston rod of the bottom tank oil cylinder 62 and the rear end of the crossbeam arm 13 are hinged through a second connecting pin 64 .

[0070] When the bottom bin cylinder 62 is extended, its piston rod moves downward to push the rear end of the cross beam arm 13 downward, the plane position of the bottom bin cover 21 does not change, and the front end of the cross beam arm 13 rotates around the bottom bin pin shaft 5. In this state, the bottom bin frame 1 drives the cutter seat 23 to rotate downward around the bottom bin pin shaft 5, and the rear ends of the rear cross beam 12 and the cutter seat 23 move downward, increasing the angle between the bottom bin cover 21 and the cutter seat 23. There is enough operating space for replacing the cutter or cleaning the bottom bin, which is convenient for personnel operation; when the bottom bin cylinder 62 is retracted, the bottom bin frame 1 drives the cutter seat 23 to return to the working position.

[0071] In some other specific embodiments, a cutter overload protection mechanism 4 is further included. The cutter overload protection mechanism 4 is fixed to the hydraulic pipeline 39 of the first oil cylinder 37 and the second oil cylinder 38 to protect the cutter 22 from overload.

[0072] The cutter overload protection mechanism 4 includes a first energy storage buffer 41 and a second energy storage buffer 42. The first energy storage buffer is connected in series to the hydraulic line 39 corresponding to the first oil cylinder 37; the second energy storage buffer 42 is connected in series to the hydraulic line 39 corresponding to the second oil cylinder 38. If hard objects such as stones are encountered during the grass cutting process, the first energy storage buffer 41 and the second energy storage buffer 42 provide overload protection for the cutter 22.

[0073] Example 2:

[0074] The embodiment of the present invention discloses a method for using a bottom bin cutter device of a large square straw bale picking and baling machine. The bottom bin cutter device of Example 1 is used. When performing picking and baling operations, according to the cutting length requirements of different straw materials, the extension and contraction of the first oil cylinder and the second oil cylinder are adjusted to control the interval extension, full extension or full retraction of the cutter to achieve three cutting lengths of the straw material. At the same time, the first energy storage buffer and the second energy storage buffer are respectively installed in series in the hydraulic pipelines of the first oil cylinder and the second oil cylinder. When the cutter encounters a hard object such as a stone, the cutting force is overloaded. Under the buffering operation of the accumulator, the cutter is buffered and pressed back to avoid damage to the cutter due to overload, thereby achieving cutter overload protection. Specifically, the method includes:

[0075] S1. The first oil cylinder extends and the second oil cylinder retracts; the telescopic rod of the first oil cylinder drives the first transmission plate to rotate around the rotating axis, with its front end facing upward and its rear end rotating downward; the rear end of the first transmission plate drives the fixed axis to move downward and drives multiple first crank arms to rotate around the rotating axis, with the front end of the first crank arm facing upward and the rear end facing downward. The rotating shaft at the front end of the first crank arm drives the cutter to rotate upward around the cutter axis, and the odd-numbered cutters extend out of the knife groove. When the grass material passes through the bottom silo cover, the grass material is cut into medium-length grass sections;

[0076] S2, the first oil cylinder extends, and the second oil cylinder extends; the first oil cylinder extends the odd-numbered cutters as in S1; the second oil cylinder extends, and the piston rod of the second oil cylinder drives the second transmission plate to rotate the rotating shaft around the cutter seat, and at the same time drives the front end shaft of the second crank arm to move the even-numbered cutters to rotate upward around the cutter shaft, and the even-numbered cutters extend from the knife groove. At this time, the cutters are all extended, and the grass material is cut into short grass sections when it passes through the bottom silo cover;

[0077] S3, the first oil cylinder and the second oil cylinder both retract; when the first oil cylinder retracts, the first transmission plate rotates around the rotating shaft, with its front end downward and its rear end upward, driving the fixed shaft to move upward, and one of the crank arms rotates around the rotating shaft. At this time, the rear end of the first crank arm is upward and the front end is downward, and the odd-numbered cutters retract; similarly, when the second oil cylinder retracts, the second transmission plate drives the rotating shaft to rotate around the cutter seat. At this time, the rear end of the second transmission plate is downward and the front end is upward, and the second crank arm fixed on the rotating shaft rotates synchronously with its rear end downward and the front end upward, pushing the even-numbered cutters back. In this state, all the cutters retract and no grass material is cut.

[0078] S4. When the odd-numbered cutter extends from the knife slot of the bottom silo cover to cut the grass material, the pressure of the hydraulic circuit remains locked. When hard objects such as stones mixed in the grass material act on the odd-numbered cutter, the cutting resistance is overloaded, and the cutter rotates downward around the cutter shaft and is pressed back under the bottom silo cover. The front end rotating shaft of the first crank arm is pressed down in the cutter slot hole and rotates around the rotating shaft, driving the fixed shaft at the rear end upward. The first crank arm on the fixed shaft compresses the piston rod of the first cylinder around the rotating shaft. When the load pressure is greater than the pressure threshold of the first energy storage buffer, the first cylinder is compressed and retracted, and the compressed and retracted hydraulic oil enters the first energy storage buffer, increasing the internal energy storage pressure. When the stone passes through the cutter, the cutting load is reduced, and the pressure of the first energy storage buffer is released into the hydraulic circuit. The piston of the first cylinder is extended again, and the odd-numbered cutter is linked to extend from the knife slot of the bottom silo cover to continue cutting the grass material, thereby realizing overload protection of the odd-numbered cutter;

[0079] S5. When the even-numbered cutter extends from the knife slot of the bottom silo cover to cut the grass material, the pressure of the hydraulic circuit remains locked; when hard foreign objects such as stones mixed in the grass material act on the even-numbered cutter, the cutting resistance is overloaded, the cutter rotates downward around the cutter shaft and is pressed back under the bottom silo cover, and the front end shaft of the second crank arm is pressed down in the cutter slot, driving the rotating shaft to rotate downward around the bearing hole at the rear of the cutter seat, and the second transmission plate compresses the piston rod of the second oil cylinder. When the load pressure is greater than the pressure threshold of the second energy storage buffer, the second oil cylinder is compressed and retracted, and the compressed and retracted hydraulic oil enters the second energy storage buffer, increasing the internal energy storage pressure. When the stone passes through the cutter, the cutting load is reduced, and the pressure of the second energy storage buffer is released into the hydraulic circuit. The piston rod of the second oil cylinder is pushed out again, and the even-numbered cutter is linked to extend from the knife slot of the bottom silo cover to continue cutting the grass material, thereby realizing overload protection of the even-numbered cutter.

[0080] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0081] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bottom bin cutting device for a large square straw bale picking and baling machine, characterized in that: include: Bottom shelf (1), A cutter mechanism (2), the cutter mechanism (2) comprising a cutter seat (23), a cutter shaft (24), a cutter (22) and a bottom bin cover (21); the cutter seat (23) is push-pull connected to the bottom bin frame (1) and fastened by a locking member; the cutter shaft (24) is fixed to the front ends of the baffles on both sides of the cutter seat (23); the front end of the cutter (22) is rotatably connected to the cutter shaft (24); the bottom bin cover (21) covers the top surface of the bottom bin frame (1); a plurality of knife slots for the telescopic operation of the cutter (22) are opened on the bottom bin cover (21); A cutter adjustment mechanism (3), the cutter adjustment mechanism (3) comprising a first oil cylinder (37) and a second oil cylinder (38); the cylinder body of the first oil cylinder (37) is hinged to the baffle on one side of the cutter seat (23), and the piston rod is connected to the odd-numbered cutters (22) through a first transmission member; the cylinder body of the second oil cylinder (38) is hinged to the baffle on the other side of the cutter seat (23), and the piston rod is connected to the even-numbered cutters (22) through a second transmission member.

2. The bottom bin cutting device of a large square straw bale picking and baling machine according to claim 1 is characterized in that: The first transmission member comprises a first crank arm (32), a fixed shaft (31) and a first transmission plate (33); the first crank arms (32) are in plurality and their front ends are detachably connected to the rear ends of the odd-numbered cutters (22) in a one-to-one correspondence; the fixed shaft (31) is fixed to the rear ends of the plurality of first crank arms (32); the rear end of the first transmission plate (33) is fixed to one end of the fixed shaft (31), and the front end is hinged to the piston rod of the first oil cylinder (37).

3. The bottom bin cutting device of a large square straw bale picking and baling machine according to claim 2 is characterized in that: The second transmission member comprises a second crank arm (35), a rotating shaft (34) and a second transmission plate (36); the length of the second crank arm (35) is less than the length of the first crank arm (32); there are multiple second crank arms (35), and the multiple second crank arms (35) are placed one-to-one between two adjacent first crank arms (32) and their front ends are detachably connected to the rear ends of the even-numbered cutters (22) one-to-one; the two ends of the rotating shaft (34) are rotatably connected to the two baffles, the rotating shaft (34) passes through the first crank arm (32) and can rotate relative to each other; the rotating shaft (34) is fixed to the rear ends of the multiple second crank arms (35); the rear end of the second transmission plate (36) is fixed to one end of the rotating shaft (34), and the front end is hinged to the piston rod of the second oil cylinder (38).

4. The bottom bin cutting device of a large square straw bale picking and baling machine according to claim 1 is characterized in that: The bottom bin frame (1) comprises a front crossbeam (11) and a rear crossbeam (12) which are arranged in parallel with each other at a front-back interval, and the cutter seat (23) is placed between two opposite side walls of the front crossbeam (11) and the rear crossbeam (12); the locking member comprises a locking pin plate (26) and a positioning pin (27), the locking pin plate (26) is welded to the rear crossbeam (12), and the positioning pin (27) passes through the positioning hole of the locking pin plate (26) and abuts against the baffle to lock the cutter seat (23).

5. The bottom bin cutting device of a large square straw bale picking and baling machine according to claim 4 is characterized in that: The opposite side wall ends of the front crossbeam (11) and the rear crossbeam (12) are rotatably connected with rollers (14), and the cutter seat (23) can roll between the front crossbeam (11) and the rear crossbeam (12) via the rollers (14).

6. The bottom bin cutting device of a large square straw bale picking and baling machine according to claim 4 is characterized in that: It also includes a cross beam arm (13), the number of the cross beam arms (13) is two, and the two ends of the two cross beam arms (13) are respectively fixed to the top surface of the front cross beam (11) and the top surface of the rear cross beam (12).

7. The bottom bin cutting device of a large square straw bale picking and baling machine according to claim 6, characterized in that: The invention also includes a bottom bin pin shaft (5), which passes through the front ends of the cross beam arm (13) and the bottom bin cover (21) in sequence; the bottom bin pin shaft (5) can rotate relative to the cross beam arm (13) and the bottom bin cover (21); and the rear end of the bottom bin cover (21) is fixed to the rear end of the assembly plate (61) through a connecting plate (25).

8. The bottom bin cutting device of a large square straw bale picking and baling machine according to claim 7 is characterized in that: The invention also includes a bottom bin adjustment mechanism (6), wherein the bottom bin adjustment mechanism (6) includes an assembly plate (61) and a bottom bin oil cylinder (62); the assembly plates (61) are two in number and are respectively arranged at both ends of the bottom bin frame (1); the bottom bin cover (21) and the cross beam arm (13) are symmetrically arranged on both sides of the assembly plate (61); the lower end of the assembly plate (61) is provided with a groove for accommodating the baffle; the cylinder body of the bottom bin oil cylinder (62) is hinged to the panel of the assembly plate (61), and the piston rod is hinged to the rear end of the cross beam arm (13).

9. A bottom bin cutting device for a large square straw bale picking and baling machine according to any one of claims 1 to 8, characterized in that: It also includes a cutter overload protection mechanism (4), which is fixed on the hydraulic pipeline (39) of the first oil cylinder (37) and the second oil cylinder (38) to protect the cutter (22) from overload.

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