A small square baler for combined recycling of cotton stalks and residual film.

Abstract

This invention discloses a small square baler for a combined cotton stalk and residual film recycling machine, relating to cotton field by-product harvesting machinery. It includes a temporary storage bin, a pressing chamber, and a compression device. The rear end of the pressing chamber is connected to a discharge chamber. Inside the discharge chamber, a baling device and a bale length control device are installed, forming a feedback control connection. A waste collection and discharge device is located below the pressing chamber and the discharge chamber. This invention divides the frame into two hinged parts, with the upper part lifted by a hydraulic telescopic rod for easy maintenance. A two-stage feeding device enhances the baler's feeding capacity, reducing the impact of straw jamming in the temporary storage bin and feeding blockages. Simultaneously, the bale length control device provides feedback control of the baling device, ensuring that the length of each square bale meets preset standards. Finally, a waste collection and discharge device is located below the compression chamber and the discharge chamber to ensure the normal collection and discharge of fallen waste and foreign matter, preventing interference with the normal operation of the residual film recycling device.

Description

Technical Field

[0001] This invention relates to machinery for harvesting cotton field by-products, and more particularly to a small square baler for a combined cotton stalk and residual film recycling machine. Background Technology

[0002] Xinjiang, as the largest cotton-producing region in China and one of the world's three largest cotton-producing regions, produces approximately 25 million tons of cotton stalks annually. Dried cotton stalks used for papermaking and other purposes fetch about 300 yuan per ton, while those used as animal feed cost about 700 yuan per ton. High-quality cotton stalks have significant economic value and a large market, thus requiring efficient and high-quality cotton stalk recycling machinery.

[0003] Cotton stalks differ significantly from other crop stalks. Cotton stalks consist only of a main stem and side branches, and are relatively stiff, with poor toughness and low compression resilience. Existing agricultural straw balers are unsuitable for cotton stalks, exhibiting problems such as easy clogging of the feed inlet, insufficient compression force, complex adjustment of knot length, and residue loss. In combined cotton stalk and residual film recycling machines, residue loss leads to excessively high impurity levels in the recycled film, affecting the machine's performance.

[0004] Therefore, there is an urgent need for a baling structure that is efficient and simple, can effectively control the length of straw bales, and can maintain the consistency of straw bale length under complex working conditions. Based on this, a small square bale baler for cotton straw and residual film combined recycling machine is proposed. Summary of the Invention

[0005] The present invention aims to provide a small square baler for a combined cotton stalk and residual film recycling machine, in order to solve the problems of clogging of straw balers, ineffective handling of falling residue, and inability to effectively control the length of straw bales to remain consistent.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A square baler for a combined operation machine includes a frame with a temporary storage bin mounted on the frame. The temporary storage bin contains a two-stage feeding device. The temporary storage bin is connected to a pressing chamber, which contains a compression device. The compression device includes a main compression punch and a secondary compression punch. The main compression punch performs lateral compression, and the secondary compression punch performs vertical compression, forming a vertical compression relationship. The pressing chamber extends into a discharge chamber, which contains a baling device and a baling length control device. The baling length control device and the baling device form a feedback control connection. A slag collection and discharge device is located below the pressing chamber and the discharge chamber. The two-stage feeding device, compression device, baling device, baling length control device, and slag collection and discharge device are all powered by a transmission system.

[0008] The frame includes an upper part and a lower part. The upper part is used to accommodate a temporary storage bin, a two-stage feeding device, a pressing chamber, a compression device, a discharge chamber, a bundling device, and a bundling length control device. The lower part is used to accommodate a slag collection and discharge device. The upper part and the lower part are hinged on one side, and a hydraulic telescopic rod is installed between the upper part and the lower part.

[0009] Furthermore, the two-stage feeding device includes a feeding roller and a feeding roller. Both the feeding roller and the feeding roller are provided with feeding teeth. The feeding roller is a telescopic toothed roller with telescopic feeding teeth. The rotational speed of the feeding roller is greater than that of the feeding roller.

[0010] Furthermore, the bundle length control device includes a ratchet, which is installed on the side of the discharge chamber. An encoder is installed on the shaft of the ratchet. The encoder converts the angular position information of the ratchet rotation into an electrical signal, and controls the electromagnetic clutch through the central control system based on the electrical signal data. One end of the electromagnetic clutch is connected to the transmission system, and the other end is connected to the bundling device.

[0011] Furthermore, the bundling device includes a needle feeder and a knotter. The knotter and the needle feeder are arranged opposite each other on both sides of the discharge chamber. The knotter is driven by a knotter shaft, which is connected to one end of an electromagnetic clutch. The needle feeder is connected to the knotter shaft through a crank-rocker mechanism. The crank of the crank-rocker mechanism is rotatably connected to the knotter shaft. The crank is hinged to the needle feeder through a connecting rod. The needle feeder is fixedly and rotatably connected to the frame. A needle is provided on the needle feeder.

[0012] Furthermore, the knotter is equipped with a fan, and the drive shaft of the fan is connected to the shaft of the knotter.

[0013] Furthermore, the slag collection and discharge device includes a collection hopper, which is detachably installed on the conveyor belt. A drive shaft and a driven shaft are respectively installed on both sides of the conveyor belt. The drive shaft is connected to the transmission system, and a tension adjustment device for the conveyor belt is installed on the driven shaft.

[0014] Furthermore, the conveyor belt is a skirted partition conveyor belt.

[0015] Furthermore, the transmission system provides power to the two-stage feeding device, compression device, baling device, baling length control device, and slag collection and discharge device via chains and shafts.

[0016] The principle and beneficial effects of this technical solution:

[0017] 1. The frame is divided into two hinged parts. The upper part integrates the material feeding mechanism, the material feeding mechanism, the compression mechanism, and the bundling length control mechanism. The lower part houses the slag collection and discharge device. The upper part is lifted by a hydraulic telescopic rod to expose the main components of the feeding mechanism, the compression mechanism, and the bundling length control mechanism, which facilitates later maintenance.

[0018] 2. This invention features a bucket-shaped temporary storage bin, which ensures that straw enters the subsequent compression mechanism evenly, reducing or eliminating the adverse effects of material quantity variations on the stability and reliability of the baler. Simultaneously, a two-stage feeding device within the temporary storage bin enhances the baler's feeding capacity and increases the feeding speed of the straw. This device not only guides the straw feeding but also accelerates the speed and volume of straw entering the compression chamber. When the straw feeding amount is small, the straw in the temporary storage bin primarily contacts the feeding rollers, maximizing contact effectiveness. When a large amount of straw is fed, the feeding rollers and feeding rollers work together, significantly enhancing the feeding capacity of the feeding mechanism, thereby reducing the problems of straw jamming and blockage in the temporary storage bin, which negatively impact the operation of the baler.

[0019] 3. This invention employs a bale length control device to control the baling device. When the bale is compressed by the punch and moved to the discharge chamber, the movement of the bale will drive the ratchet to rotate. The ratchet's rotation causes the ratchet shaft to rotate. The angle and position of the ratchet's rotation are identified by an encoder. Then, based on the set bale length value, the electromagnetic clutch is engaged and disengaged, achieving real-time bale length monitoring and dynamic response for needle feeding and knotting, ensuring that the length of each bale meets the preset standard. The system mainly relies on the electromagnetic clutch and encoder to achieve bale length control, realizing a closed-loop control system from bale length sensing to mechanical execution.

[0020] 4. The present invention has a slag collection and discharge device installed below the compression chamber and the discharge chamber. This device is the core device to ensure straw deposition and reduce material blockage. In particular, it is designed to handle straw fragments, broken straw, dust and other foreign objects. The skirted partition conveyor belt can transport the straw residue and fits against the inner wall of the collection hopper to ensure that the discharge dead angle in the collection hopper is small. This can effectively ensure the normal collection and discharge of the fallen residue and foreign objects, so as not to affect the normal operation of the whole machine. Attached Figure Description

[0021] Figure 1 A schematic diagram of a small square baler used in a combined cotton stalk and residual film recycling machine;

[0022] Figure 2 A schematic diagram of the internal structure of a small square baler after the top of a cotton stalk and residual film recycling machine is lifted up;

[0023] Figure 3A cross-sectional schematic diagram of a small square baler used in a combined cotton stalk and residual film recycling machine;

[0024] Figure 4 This is a block diagram of the power transmission route for a small square baler used in a combined cotton stalk and residual film recycling machine.

[0025] The reference numerals in the accompanying drawings include:

[0026] 1. Frame; 101. Upper part; 102. Lower part; 2. Temporary storage bin; 3. Two-stage feeding device; 301. Feeding roller; 302. Feeding roller; 303. Feeding teeth; 4. Pressing chamber; 5. Compression device; 501. Main compression punch; 502. Auxiliary compression punch; 6. Discharge chamber; 7. Bundling device; 701. Needle feeder; 702. Knotter; 703. Knotter shaft; 704. Curved Handle rocker mechanism; 7041, crank; 7042, connecting rod; 705, needle; 8, bundle length control device; 801, ratchet; 802, encoder; 9, slag collection and discharge device; 901, hopper; 902, conveyor belt; 903, drive shaft; 904, driven shaft; 905, tension adjustment device; 10, transmission system; 11, fan; 12, electromagnetic clutch; 13, hydraulic telescopic rod. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0028] It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only structures closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0029] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, or component, but does not exclude the presence or addition of one or more other features, elements, or components.

[0030] In the following description, embodiments of the invention will be illustrated with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts.

[0031] refer to Figures 1 to 4 A small square baler for cotton stalk and residual film combined recycling machine mainly includes four major mechanisms installed on the frame 1, namely, feeding mechanism, compression mechanism, baling length control mechanism and slag collection and discharge device 9.

[0032] 1. Hinge setting of frame 1

[0033] In this embodiment, the frame 1 is divided into an upper part 101 and a lower part 102. The upper part 101 is used to accommodate the feeding mechanism, the compression mechanism, and the bundling length control mechanism, namely, the temporary storage bin 2, the two-stage feeding device 3, the pressing chamber 4, the compression device 5, the discharge chamber 6, the bundling device 7, and the bundling length control device 8. The lower part 102 is used to accommodate the slag collection and discharge device 9. The upper part 101 and the lower part 102 are hinged on one side. A hydraulic telescopic rod 13 is installed between the upper part 101 and the lower part 102. (Refer to...) Figure 1 and Figure 2 A hydraulic telescopic rod 13 is installed on each side of the upper part 101 and the lower part 102. The hydraulic telescopic rod 13 can rotate the upper part 101 relative to the lower part 102 along the hinge between the two to facilitate maintenance work.

[0034] It is worth noting that since the slag collection and discharge device 9 is connected to the compression mechanism by a chain drive, when the upper part 101 is lifted relative to the lower part 102 by the hydraulic telescopic rod 13, the chain between the two needs to be removed first.

[0035] 2. Feeding device

[0036] A temporary storage bin 2 is installed on the frame 1. The temporary storage bin 2 is hopper-shaped, which can make the straw enter the subsequent compression mechanism evenly, so as to reduce or eliminate the adverse effects of material quantity changes on the stability and reliability of the baler operation.

[0037] The temporary storage bin 2 is equipped with a two-stage feeding device 3, which includes a feeding roller 301 and a feeding roller 302. Multiple feeding teeth 303 are installed at equal intervals along the axial direction on the feeding roller 301 and the feeding roller 302. The feeding teeth 303 are circumferentially distributed on the roller, and each row of feeding teeth 303 is evenly distributed. The feeding roller 302 is a telescopic toothed roller, on which telescopic feeding teeth 303 are provided.

[0038] The feeding roller 301 and the feeding roller 302 are arranged laterally opposite each other and have a certain height difference. When the amount of straw fed is particularly large, the feeding teeth 303 can also play a certain role in crushing the fed straw, making the straw shorter and easier to enter the compression chamber and be compacted in the compression chamber. The rotation speed of the first-stage feeding feeding roller 301 is relatively higher than that of the second-stage feeding feeding roller 301 to ensure that there is a certain amount of feed when the second feeding roller feeds.

[0039] 3. Compression mechanism

[0040] The lower part of the temporary storage bin 2 is connected to the pressing chamber 4. The pressing chamber 4 is equipped with a compression device 5. The compression device 5 includes a main compression punch 501 and an auxiliary compression punch 502. The main compression punch 501 performs horizontal compression, and the auxiliary compression punch 502 performs vertical compression. In this embodiment, the compression punches achieve repeated pressing through the crank 7041 slider mechanism.

[0041] The main compression punch 501 and the auxiliary compression punch 502 form an alternating compression relationship. After the straw is fed in from the upper temporary storage bin 2, it enters the compression chamber. The main compression punch 501 first performs preliminary compression on the straw and gradually moves the bale laterally. Then, the auxiliary compression punch 502 compacts the bale vertically. The transmission ratio of the two compression punches is 1:1. When the auxiliary compression punch 502 is in the extreme retraction position, the main compression punch 501 is in the compression limit position. When the main compression punch 501 is in the extreme retraction position, the auxiliary compression punch 502 is in the compression limit position. This not only achieves continuous compaction of the bale, but also effectively avoids mutual interference between the two compression punches during operation.

[0042] 4. Bundling length control bundling mechanism

[0043] The pressing chamber 4 extends into a discharge chamber 6, which is equipped with a bundling device 7 and a bundling length control device 8. The bundling length control device 8 and the bundling device 7 form a feedback control connection.

[0044] The bundle length control device 8 includes a ratchet 801, which is installed on the side of the discharge chamber 6. An encoder 802 is installed on the shaft of the ratchet 801. The encoder 802 converts the rotation angle position information of the ratchet 801 into an electrical signal, and controls the electromagnetic clutch 12 through the central control system based on the electrical signal data. One end of the electromagnetic clutch 12 is connected to the transmission system 10, and the other end is connected to the bundling device 7.

[0045] The bundling device 7 includes a needle feeder 701 and a knotter 702. The knotter 702 and the needle feeder 701 are arranged opposite each other on both sides of the discharge chamber 6. In this embodiment, a Lassborough RS6003 knotter 702 with a shaft diameter of 35mm is used, which can be used for high-intensity operations. The knotter 702 is driven by a knotter shaft 703, which is connected to one end of an electromagnetic clutch 12. The needle feeder 701 is connected to the knotter shaft 703 through a crank-rocker mechanism 704. The crank 7041 of the crank-rocker mechanism 704 is rotatably connected to the knotter shaft 703. The crank 7041 is hinged to the needle feeder 701 through a connecting rod 7042. The needle feeder 701 is fixedly and rotatably connected to the frame 1. A needle 705 is provided on the needle feeder 701.

[0046] Its operating principle is as follows: When the bale is squeezed and moved to the discharge chamber 6 by the main compression punch 501, the movement of the bale will drive the ratchet 801 to rotate. The rotation of the ratchet 801 will cause the ratchet 801 shaft to rotate. The angle and position information of the ratchet 801 rotation are identified by the encoder 802. Then, the electromagnetic clutch 12 is controlled to engage and disengage according to the set bale length value, realizing real-time bale length monitoring and dynamic response of needle feeding and knotting, ensuring that the length of each bale meets the preset standard. The system mainly relies on the electromagnetic clutch device and the encoder 802 to realize bale length control, realizing a closed-loop control system from bale length sensing to mechanical execution. When the hay passes through the discharge chamber 6, the encoder 802 outputs an electrical signal. These electrical signals are transmitted through the line, analyzed and converted into a real-time bale length value, and compared with the target length set by the operator to realize the initial control command.

[0047] The operation cycle of straw bale knotting: First, when the bale length control device 8 detects that the travel length of the straw bale has reached the preset value, the electromagnetic clutch 12 responds and connects, and the knotter shaft 703 is connected to the transmission system 10 and rotates. The knotter shaft 703 drives the crank rocker mechanism 704 to rotate. Specifically, the crank 7041 makes a circular motion, which drives the needle feeder 701 (i.e., rocker) to swing back quickly through the connecting rod 7042. This causes the needle feeder 701, which is fixedly rotatably connected to the frame 1, to swing periodically in an arc relative to the frame 1, so that the needle 705 on the needle feeder 701 pierces the straw bale, completes the threading of the rope, and knots it through the knotter 702.

[0048] After the baling mechanism completes this work cycle, it will immediately enter the reset preparation stage. After the knotter 702 completes the knot fixing and cutting action, the electromagnetic clutch 12 automatically returns to the initial state, preparing for the next needle feeding and knotting. The encoder 802 continues to detect the travel length of the bale to ensure that the system can maintain stable control accuracy during long-term continuous operation, realizing precise control of bale size and adapting to the impact of complex field conditions.

[0049] It is worth noting that since the needle 705 may bring some straw, ash, or other foreign objects into the knotter 702 area when piercing the straw bale, affecting the operation of the knotter 702, a fan 11 can be installed on the knotter 702 to blow away foreign objects into the working area of ​​the knotter 702, ensuring that no foreign objects are brought into the knotting area during its operation and affecting the operation of the knotter 702. The drive shaft of the fan 11 and the knotter shaft 703 form a chain drive connection to achieve synchronous response.

[0050] 5. Slag collection and discharge device 9

[0051] Below the pressing chamber 4 and the discharge chamber 6, there is a slag collection and discharge device 9. The slag collection and discharge device 9 includes a hopper 901, which is detachably installed on the conveyor belt 902. A drive shaft 903 and a driven shaft 904 are respectively installed on both sides of the conveyor belt 902. The drive shaft 903 is connected to the transmission system 10. A tension adjustment device 905 of the conveyor belt 902 is installed on the driven shaft 904.

[0052] Based on the analysis of the working environment and material characteristics of the straw harvester-square baling device 7, suitable discharge methods include chain-plate discharge device and skirted partition conveyor belt 902 discharge device, as follows:

[0053] The 902 chain conveyor belt mainly consists of metal chain plates and chains, with a rigid connection, making it suitable for heavy-duty and large materials. However, it also has some obvious disadvantages: poor sealing, easy material leakage, large gaps between plates, serious dust generation, high operating noise, and high energy consumption.

[0054] Skirted partition conveyor belt 902: The main material is rubber / PVC belt body + side skirts and middle partition. It has a flexible design and is suitable for light, powdery or granular materials. It has good sealing performance, low operating noise, and convenient maintenance. Only cleaning or partial replacement of damaged belt is required. It has low consumption.

[0055] Through comparison, the chain conveyor has the problem of large gaps during discharge, which makes straw easy to accumulate. It is more suitable for conveying large materials under high torque conditions. The chain conveyor's conveying effect is also inferior to the skirted partition conveyor belt type 902 discharge device. Therefore, the skirted partition conveyor belt type 902 discharge device is more suitable for the working environment of the square bale baling device 7 and the material characteristics of straw. Thus, in this embodiment, the skirted partition conveyor belt type 902 discharge device is used. The left side is the power input part, the drive shaft 903, and the feed shaft part uses a non-powered roller with a tension adjustment bracket.

[0056] 6. Transmission system 10

[0057] The two-stage feeding device 3, the compression device 5, the baling device 7, the baling length control device 8, and the slag collection and discharge device 9 are all powered by the transmission system 10. The transmission system 10 can be connected to an external power output device, which can be the power output shaft of a combine harvester, or the power output shaft of an electric motor, internal combustion engine, etc.

[0058] The transmission system 10 is designed as follows: Power is input from the power shaft of the main compression punch 501, and then transmitted to the shaft of the auxiliary compression punch 502 via its sprocket. The transmission ratios of the two cranks 7041 and slider compression punches are the same, ensuring that they do not interfere with each other during operation. The sprockets on both sides of the upper compaction punch and the feed roller have the same transmission ratio, ensuring that their movements are synchronized. The sprockets at the knotter shaft 703 and the sprockets of the fan 11 use a large and a small sprocket, respectively, to ensure that the centrifugal fan 11 has a high speed to provide a certain amount of air output. The power transmission route diagram is shown below. Figure 4 .

[0059] This design scheme develops a straw square bale baling device 7 suitable for assembly, mainly composed of various components such as a two-stage feeding device 3, a compression device 5, a baling device 7, a bale length control device 8, and a waste collection and discharge device 9, which can achieve the following functions:

[0060] 1. The frame 1 is divided into two hinged parts, the upper part 101 integrates the feeding mechanism, the compression mechanism, and the bundling length control and bundling mechanism, and the lower part 102 accommodates the slag collection and discharge device 9. The upper part 101 is lifted by the hydraulic telescopic rod 13, so that the main components of the feeding mechanism, the compression mechanism, and the bundling length control and bundling mechanism are exposed, which facilitates the later maintenance work.

[0061] 2. This invention features a bucket-shaped temporary storage bin 2, which ensures that straw enters the subsequent compression mechanism evenly, reducing or eliminating the adverse effects of material quantity variations on the stability and reliability of the baler's operation. Simultaneously, a two-stage feeding device 3 within the temporary storage bin 2 enhances the baler's feeding capacity and increases the feeding speed of the straw fed by the feeding mechanism. This device not only guides the straw feeding but also accelerates the speed and volume of straw entering the compression chamber. When the straw feeding amount is small, the straw in the temporary storage bin 2 primarily contacts the feeding roller 301, maximizing the contact effect. When a large amount of straw is fed, the feeding roller 301 and the feeding roller 302 work together, significantly enhancing the feeding capacity of the feeding mechanism, thereby reducing the problems of straw jamming and blockage in the temporary storage bin 2 that affect the operation of the straw baler.

[0062] 3. This invention employs a bale length control device 8 to feedback control the baling device 7. When the bale is compressed by the compression punch and moved to the discharge chamber 6, the movement of the bale will drive the ratchet 801 to rotate. The rotation of the ratchet 801 drives the ratchet 801 shaft to rotate. The angle and position information of the ratchet 801 rotation are identified by the encoder 802. Then, the electromagnetic clutch 12 is engaged and disengaged by the set bale length value, realizing real-time bale length monitoring and dynamic response of needle feeding and knotting, ensuring that the length of each bale meets the preset standard. The system mainly relies on the electromagnetic clutch device and the encoder 802 to realize bale length control, achieving a closed-loop control system from bale length sensing to mechanical execution.

[0063] 4. The present invention provides a slag collection and discharge device 9 below the compression chamber and the discharge chamber 6. This device is the core device for ensuring straw deposition and reducing material blockage. In particular, it is designed to handle straw fragments, broken straw, dust and other foreign matter. The skirted partition conveyor belt 902 can transport the residue of fallen straw and fits against the inner wall of the collection hopper 901 to ensure that the discharge dead angle in the collection hopper 901 is small. This can effectively ensure the normal collection and discharge of fallen residue and foreign matter, so as not to affect the normal operation of the whole machine.

[0064] Its main working principle is as follows: Straw is evenly fed into the system through a two-stage feeding device 3 in the temporary storage bin 2, which initially straightens the direction of the straw to avoid accumulation and blockage, providing a continuous and stable material flow for subsequent compression. In the compression chamber, the crank 7041 slider mechanism causes the compression device 5 to reciprocate, compressing the fed straw into square bales of fixed size. The baling mechanism senses the length of the bales through the encoder 802, and then controls the electromagnetic clutch 12 to work based on the set square bale length, driving the needle feeder 701 to make the needle 705 pass through the straw bale, completing the threading of the rope bale, and knotting it through the knotter 702. The fallen straw residue is conveyed to the discharge port by the skirt partition conveyor belt 902.

[0065] It should be clarified that the present invention is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific structures are described and shown as examples. However, the method process of the present invention is not limited to the specific structures described and shown, and those skilled in the art can make various changes, modifications, and additions after understanding the spirit of the present invention.

[0066] In this invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the embodiments of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A square baler for a combined operation machine, characterized in that: The device includes a frame (1), on which a temporary storage bin (2) is installed. The temporary storage bin (2) is equipped with a two-stage feeding device (3). The temporary storage bin (2) is connected to a pressing chamber (4). A compression device (5) is installed in the pressing chamber (4). The compression device (5) includes a main compression punch (501) and a secondary compression punch (502). The main compression punch (501) performs lateral compression, and the secondary compression punch (502) performs vertical compression. The main compression punch (501) and the secondary compression punch (502)... The two-stage feeding device (3), the compression device (5), the bundling device (7), the bundling device (7), the bundling device (8), and the slag collection and discharge device (9) are all powered by the transmission system (10). The frame (1) includes an upper part (101) and a lower part (102). The upper part (101) is used to accommodate a temporary storage bin (2), a two-stage feeding device (3), a pressing chamber (4), a compression device (5), a discharge chamber (6), a bundling device (7), and a bundling length control device (8). The lower part (102) is used to accommodate a slag collection and discharge device (9). The upper part (101) and the lower part (102) are hinged on one side. A hydraulic telescopic rod (13) is installed between the upper part (101) and the lower part (102).

2. The square baler for a combined operation machine according to claim 1, characterized in that: The two-stage feeding device (3) includes a feeding roller (301) and a feeding roller (302). Both the feeding roller (301) and the feeding roller (302) are provided with feeding teeth (303). The feeding roller (302) is a telescopic toothed roller with telescopic feeding teeth (303) on it. The rotation speed of the feeding roller (302) is greater than the rotation speed of the feeding roller (301).

3. The square baler for a combined operation machine according to claim 1, characterized in that: The bundle length control device (8) includes a ratchet (801), which is installed on the side of the discharge chamber (6). An encoder (802) is installed on the shaft of the ratchet (801). The encoder (802) converts the angular position information of the ratchet (801) into an electrical signal, and controls the electromagnetic clutch (12) through the central control system based on the electrical signal data. One end of the electromagnetic clutch (12) is connected to the transmission system (10), and the other end is connected to the bundling device (7).

4. A square baler for a combined operation machine according to claim 3, characterized in that: The bundling device (7) includes a needle feeder (701) and a knotter (702). The knotter (702) and the needle feeder (701) are arranged opposite each other on both sides of the discharge chamber (6). The knotter (702) is driven by a knotter shaft (703). The knotter shaft (703) is connected to one end of an electromagnetic clutch (12). The needle feeder (701) is connected to the knotter shaft (703) through a crank rocker mechanism (704). The crank (7041) of the crank rocker mechanism (704) is rotatably connected to the knotter shaft (703). The crank (7041) is hinged to the needle feeder (701) through a connecting rod (7042). The needle feeder (701) is fixedly and rotatably connected to the frame (1). A needle (705) is provided on the needle feeder (701).

5. A square baler for a combined operation machine according to claim 4, characterized in that: The knotter (702) is equipped with a fan (11), and the drive shaft of the fan (11) is connected to the knotter shaft (703).

6. A square baler for a combined operation machine according to claim 1, characterized in that: The slag collection and discharge device (9) includes a collection hopper (901), which is detachably mounted on a conveyor belt (902). A drive shaft (903) and a driven shaft (904) are respectively mounted on both sides of the conveyor belt (902). The drive shaft (903) is connected to the transmission system (10), and a tension adjustment device (905) for the conveyor belt (902) is mounted on the driven shaft (904).

7. A square baler for a combined operation machine according to claim 6, characterized in that: The conveyor belt (902) is a skirted partition conveyor belt (902).

8. The square baler for any of the combined operation machines according to claims 1-7, characterized in that: The transmission system (10) provides power to the two-stage feeding device (3), the compression device (5), the bundling device (7), the bundling length control device (8), and the slag collection and discharge device (9) via chains and shafts.

Images