Rope clamping mechanism of knotter of square bale collecting and bundling machine

Abstract

The invention relates to the technical field of pasture processing equipment, in particular to a rope clamping mechanism of a knotter of a square bale collecting machine. Comprising a frame body, a pulley, a guide frame, a pressing assembly, a clamping bottom plate assembly, an oil cylinder and a spring connecting rod. The main body of the frame body is a rectangular strip and is provided with a guide ring, the pulley is mounted on the side surface of the frame body, and the guide frame is hinged to the pulley seat; the oil cylinder and the spring connecting rod are arranged on the bottom surface of the frame body and are connected with each other; the clamping bottom plate assembly is fixedly connected to the bottom face of the frame body, one end of the pressing assembly is fixedly connected to the spring connecting rod, and the other end of the pressing assembly is hinged to the frame body. The knotting rope penetrates through the guide ring, penetrates out of a gap between the clamping bottom plate assembly and the pressing assembly, bypasses the guide frame and the pulley and then penetrates through the large needle. The oil cylinder stretches out and draws back to drive the spring connecting rod to move, and the spring connecting rod drives the pressing assembly to rotate to clamp the knotting rope. Automatic clamping can be achieved, the clamping force can be adjusted, and the rope buckle quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of forage processing equipment, in particular to a rope clamping mechanism of a knotter of a square grass bale baler. Background Art

[0002] At present, there are many types of bales, including small square bales, large square bales, and large round bales. Small square bales are suitable for small plots, large square bales are suitable for large areas, and are convenient for users to collect and transport. Large round bales are limited in transportation and are not suitable for long-distance transportation. Small square bales are about 30-40 cm (width) × 40-50 cm (height) × 70-100 cm (length), and the weight of a single bale is usually 15-30 kg. The size of a large square bale is usually 1.1-2.2 meters long, 1.15 meters wide, and 0.8 meters high, and the weight of a single bale is usually 500-800 kg. At present, the large square bale baler on the market is towed by a tractor, which can complete the automatic picking, chopping, pre-pressing, feeding, compression, and bundling of materials such as grass and straw at one time. It has the advantages of high degree of automation, efficient operation, regular bale shape, tight bundling, and convenient storage and transportation. However, the price is expensive, generally between 1.38 million and 1.58 million, and a manufacturer's tractor needs to be purchased, which is also priced at 1 million, with a total price of more than 2 million. The cost is too high for the majority of domestic farmers, and the subsequent maintenance costs are also too high. Due to its high investment and long payback period, it has not been promoted and used in China. Small square bundles are generally used in China, and they are picked up, stacked, and bundled manually. Not only is the operating efficiency low, but as the people willing to work in this industry gradually age, there is a labor shortage, and labor costs increase year by year.

[0003] The square bale baler can collect, squeeze and bundle small square bales, and turn small square bales into large square bales. With the help of grab buckets and lifting equipment, large square bales can be directly transported to a flatbed truck for easy transportation. Only one person is needed to complete the picking and baling operation, and the cost is much lower than that of a large square bale baler. At present, domestic two-way rope balers have formed large-scale production, and the general price after enjoying agricultural subsidies is about 100,000. With a large market share, only a square bale baler is needed to pick up, squeeze and bundle small square bales into large square bales. There is no need to purchase a high-horsepower tractor separately. A two-way rope tractor can be used, which saves the cost of purchasing a tractor, saves manual picking time, and improves efficiency.

[0004] To turn a small square bale into a large square bale, it is necessary to use a knotted rope to tie N bundles of small square bales together and use a knotter, a large needle assembly, etc. to tie the knotted rope into a buckle. The knotter is the core working component of the baler, and the rope clamping mechanism is the main working component of the tie. In order to ensure that the knotted rope buckle is firm, reliable, and does not fall apart, the knotted rope needs to be clamped with a certain force when tying the knot to give it the required tension. However, the existing rope clamping mechanism of the knotter has a low degree of automation and cannot achieve automatic clamping, and cannot adapt to the square straw bale baler with high requirements for automation; and the clamping force cannot be adjusted, and the clamping force cannot be adjusted according to the raw material properties and moisture content of the straw bale, which affects the quality of the rope buckle. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a rope clamping mechanism of a knotter of a square grass bale baler, which can automatically clamp and adjust the clamping force to ensure the quality of the rope buckle.

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

[0007] A rope clamping mechanism of a knotter of a square grass bale baler comprises a frame, a pulley, a guide frame, a clamping assembly, a clamping base plate assembly, an oil cylinder and a spring connecting rod; the frame body is a rectangular strip and is provided with a guide ring, the pulley is mounted on the side of the frame, and the guide frame is hinged on the pulley seat; the oil cylinder and the spring connecting rod are mounted on the bottom surface of the frame, and the oil cylinder is connected to the spring connecting rod; the clamping base plate assembly is fixedly connected to the bottom surface of the frame, one end of the clamping assembly is fixedly connected to the spring connecting rod, and the other end is hinged to the frame; the knotting rope passes through the guide ring, passes through the gap between the clamping base plate assembly and the clamping assembly, bypasses the guide frame and the pulley, and passes through the large needle, the oil cylinder is extended and retracted to drive the spring connecting rod to move, and the spring connecting rod drives the clamping assembly to rotate, thereby clamping the knotting rope.

[0008] Furthermore, the frame body includes a cylinder seat, a trough body, a guide ring, a pulley seat, a U-shaped support ring and a hinge shaft; the cross-section of the trough body is a groove shape, the cylinder seat is fixed to the end of the bottom surface of the trough body, the pulley seat is fixed to one side of the trough body, the guide ring is fixed to the other side of the trough body, the U-shaped support ring is fixed to the pulley seat, the hinge shaft is fixed to the U-shaped support ring, and the guide frame is hinged on the hinge shaft.

[0009] Furthermore, the wheel body of the pulley is provided with a V-shaped groove.

[0010] Furthermore, the pulley includes a wheel body, a bearing and a sleeve; the wheel body is connected to the sleeve through the bearing, the sleeve is sleeved on the bolt, and the bolt is installed on the pulley seat.

[0011] Furthermore, the guide frame includes a V-shaped strip and a guide shaft; the guide shaft is vertically fixed between two V-shaped strips parallel to each other.

[0012] Furthermore, the clamping assembly includes a rotating body, a pressure plate and a spring; the rotating body is hinged to the bottom surface of the frame, the pressure plate is connected to the rotating body, one end of the spring is fixed to the rotating body, and the other end is fixed to the pressure plate; a guide hole is provided on the pressure plate.

[0013] Furthermore, the clamping base plate assembly includes a base plate and a guide column; the base plate is fixed to the bottom surface of the frame, the guide column is vertically fixed to the base plate, and the guide column passes through the guide hole on the pressure plate.

[0014] Furthermore, the spring connecting rod includes a screw rod, a first nut, a spacer sleeve, a positioning block, a spring seat, a compression spring and a second nut; the first nut, the spacer sleeve, the positioning block, the spring seat, the compression spring and the second nut are sequentially installed on the screw rod, and the clamping assembly is fixed to the positioning block; the position of the clamping assembly is adjusted by the spacer sleeve, and the compression degree of the compression spring is increased or decreased by adjusting the first nut and the second nut.

[0015] Furthermore, it also includes a connecting sleeve, which is sleeved on the screw rod, and the spring connecting rod is connected to the frame body through the connecting sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention is provided with a pulley, a guide frame, a clamping assembly, a clamping base plate assembly, an oil cylinder and a spring connecting rod. The knotted rope passes through the guide ring, passes through the gap between the clamping base plate assembly and the clamping assembly, bypasses the guide frame and the pulley, and passes through the large needle. When the baler is full of grass and knotting is performed or the lifting mechanism moves upward, the oil cylinder rodless chamber is filled with oil and the piston rod extends. When the piston rod is extended, it drives the spring connecting rod to move to the right, and the movement of the lead screw drives the clamping assembly to rotate, thereby clamping the knotted rope between the clamping assembly and the clamping base plate assembly. When oil is filled into the oil rod chamber, the piston rod returns, and the clamped knotted rope is in a natural state. The present invention can clamp automatically and can adapt to square grass bale balers with high requirements for automation. The spring connecting rod of the present invention provides a clamping force for the clamping assembly. The clamping force is adjusted by adjusting the elastic force of the compression spring of the spring connecting rod, so that the magnitude of the clamping force is determined according to the raw material properties and moisture content of the straw bale, so as to ensure that the rope buckle formed when the bale is assembled and knotted is firm and reliable and does not fall apart, thereby ensuring the quality of the rope buckle.

[0018] 2. The main body of the frame of the present invention is a trough body, and the cross-section of the trough body is a groove-shaped, which enhances the bending and torsion resistance of the frame and is particularly suitable for bearing longitudinal or lateral loads; the groove structure can reduce the amount of material while maintaining strength and achieving lightweight.

[0019] 3. The wheel body of the pulley described in the present invention is provided with a V-shaped groove, which can accurately position, reduce wear, and significantly improve the safety, durability and transmission efficiency of the pulley.

[0020] 4. The clamping assembly of the present invention is provided with a rotating body, a pressure plate and a spring. The rotating body is hinged to the bottom surface of the frame, the pressure plate is connected to the rotating body, one end of the spring is fixed to the rotating body, and the other end is fixed to the pressure plate. A guide hole is provided on the pressure plate, and the guide column of the clamping bottom plate group passes through the guide hole on the pressure plate. The spring is responsible for "flexible force", and the guide column is responsible for "rigid guidance". The combination of the two makes the clamping part have both reliability, precision and durability.

[0021] 5. The spring connecting rod of the present invention comprises a screw rod, a first nut, a spacer, a positioning block, a spring seat, a compression spring and a second nut; the position of the compression assembly is adjusted by the spacer, and the compression degree of the compression spring is increased or decreased by adjusting the first nut and the second nut. The size of the clamping force is then adjusted to ensure the quality of the rope buckle when tying the bundle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a schematic front view of the local structure of the present invention.

[0024] Figure 3 It is a schematic side view of the local structure of the present invention.

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the frame of the present invention.

[0026] Figure 5 It is a schematic side view of the frame structure of the present invention.

[0027] Figure 6 It is a schematic cross-sectional view of the pulley structure of the present invention.

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the pressing assembly of the present invention.

[0029] Figure 8 It is a schematic cross-sectional view of the clamping assembly structure of the present invention.

[0030] Fig. 9 It is a schematic diagram of the three-dimensional structure of the clamping base plate assembly of the present invention.

[0031] Fig.10 It is a schematic diagram of the spring connecting rod structure of the present invention.

[0032] Fig.11 It is a schematic diagram of the installation of the clamping assembly and the spring connecting rod of the present invention.

[0033] Fig.12 It is a schematic diagram of the three-dimensional structure of the guide frame of the present invention.

[0034] Markings in the figure: 1. frame; 2. pulley; 3. guide frame; 4. clamping assembly; 5. clamping base plate assembly; 6. oil cylinder; 7. spring connecting rod; 8. knotted rope; 9. large needle; 11. oil cylinder seat; 12. slot body; 13. guide ring; 14. pulley seat; 15. U-shaped support ring; hinge shaft 16; 21. wheel body; 22. bearing; 23. bushing; 24. retaining ring for hole; 25. V-shaped groove; 31. V-shaped strip; 32. guide shaft; 33. hinge hole; 41. rotating body; 42. pressure plate; 43. spring; 51. base plate; 52. guide column; 71. screw rod; 72. first nut; 73. spacer; 74. positioning block; 75. spring seat; 76. compression spring; 77. second nut; 78. connecting sleeve. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of the present invention, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0040] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0041] like Figure 1-3 As shown, a rope clamping mechanism of a knotter of a square hay bale baler includes a frame 1, a pulley 2, a guide frame 3, a clamping assembly 4, a clamping base plate assembly 5, a cylinder 6 and a spring connecting rod 7. The main body of the frame 1 is a rectangular strip, the pulley 2 is installed on the front side of the frame 1, and the guide frame 3 is hinged on the pulley seat. The cylinder 6 and the spring connecting rod 7 are installed on the bottom surface of the frame 1, and the cylinder 6 is connected to the spring connecting rod 7. The clamping base plate assembly 5 is fixed to the bottom surface of the frame 1, one end of the clamping assembly 4 is fixed to the spring connecting rod 7, and the other end is hinged to the frame 1. The knotting rope 8 passes through the guide ring 13, passes through the gap between the clamping base plate assembly 5 and the clamping assembly 4, bypasses the guide frame 3 and the pulley 2, and passes through the large needle 9. The cylinder 6 is extended and retracted to drive the spring connecting rod 7 to move, and the spring connecting rod 7 drives the clamping assembly 4 to rotate, clamping the knotting rope 8.

[0042] like Figure 4 , Figure 5As shown, the frame 1 includes a cylinder seat 11, a groove body 12, a guide ring 13, a pulley seat 14, a U-shaped support ring 15 and a hinge shaft 16. The groove body 12 is the main body of the frame 1, and the cross section of the groove body 12 is a groove shape. The groove structure enhances the bending and torsion resistance of the frame, and is particularly suitable for bearing longitudinal or transverse loads; the groove structure can reduce the amount of material while maintaining strength and achieving lightweight.

[0043] The oil cylinder seat 11 is fixed to the left end of the bottom surface of the tank body 12, and the oil cylinder 6 is installed on the oil cylinder seat 11. A plurality of pulley seats 14 are arranged in a row and fixed to the front side of the tank body 12. In this embodiment, a total of four pulley seats 14 are provided, and the four pulley seats 14 are arranged at equal intervals on the front side of the tank body 12, and the pulley 2 is installed on the pulley seats 14. The guide ring 13 is fixed to the other side of the tank body 12, one end of the two legs of the U-shaped support ring 15 is fixed to the pulley seat 14, the hinge shaft 16 is fixed to the other end of the U-shaped support ring 15, and the guide frame 3 is hinged on the hinge shaft 16.

[0044] like Figure 6 As shown, the pulley 2 includes a wheel body 21, a bearing 22, a sleeve 23 and a hole retaining ring 24. The wheel body 21 is connected to the sleeve 23 through the bearing 22, and the wheel body 21 can rotate around its own axis. The sleeve 23 is sleeved on the bolt, and the bolt is installed on the pulley seat 41. The hole retaining ring 24 is installed on both sides of the bearing 22 to axially position the bearing 22.

[0045] The wheel body 21 is provided with a V-shaped groove 25, which can accurately position, reduce wear, and significantly improve the safety, durability and transmission efficiency of the pulley.

[0046] like Fig.12 As shown, the guide frame 3 includes two V-shaped strips 31 and two guide shafts 32. The guide shaft 32 is vertically fixed between the two V-shaped strips 31 which are parallel to each other. One guide shaft 32 is located at the bottom end of the V-shaped strip 31, and the other is located at the top of the V-shaped strip 31. The top end of the V-shaped strip 31 is provided with a hinge hole 33. The two V-shaped strips 31 which are parallel to each other are hinged at both ends of the hinge shaft 16 through the hinge hole 33.

[0047] like Figure 7 , Figure 8 , Fig.11 As shown, the clamping assembly 4 includes a rotating body 41, a pressing plate 42 and a spring 43. The rotating body 41 is composed of a connecting shaft and side plates vertically fixed to both ends of the connecting shaft. The side plates are triangular, one vertex of the side plate is fixed to the positioning block 74 of the spring connecting rod 7 by bolts, one vertex is hinged to the bottom surface of the slot body 12 by a hinge shaft, and one vertex is connected to the pressing plate 42 by bolts. One end of the spring 43 is fixed to the rotating body 41, and the other end is fixed to the pressing plate 42. The pressing plate 42 is provided with a guide hole.

[0048] like Fig. 9 , Fig.11 As shown, the clamping base plate assembly 5 includes a base plate 51 and guide columns 52. The base plate 51 is fixed to the bottom surface of the trough body 12 by bolts, and two guide columns 52 are vertically fixed to the base plate 51. The guide columns 52 pass through the guide holes on the pressure plate, and the pressure plate 42 moves along the guide columns 52.

[0049] like Fig.10 , Fig.11 As shown, the spring connecting rod 7 includes a screw rod 71, a first nut 72, a spacer 73, a positioning block 74, a spring seat 75, a compression spring 76, a second nut 77 and a connecting sleeve 78. The first nut 72 and the second nut 77 are threadedly connected to the screw rod 71, the spacer 73, the positioning block 74 and the spring seat 75 are sequentially sleeved on the screw rod 71 and located between the first nut 72 and the second nut 77, and the compression spring 76 is installed on the spring seat 75.

[0050] One vertex of the rotating body 41 of the clamping assembly 4 is fixed to the positioning block 74 by a bolt. The position of the clamping assembly 4 can be adjusted by replacing the spacer 73 of different lengths, and the compression degree of the compression spring 76 can be increased or decreased by adjusting the distance between the first nut 72 and the second nut 77.

[0051] The connecting sleeve 78 is sleeved on the screw rod 71, and nuts are provided at both ends, and the connecting sleeve 78 is fixed by the nuts, and the position of the connecting sleeve 78 is adjusted. The spring connecting rod 7 is connected to the bottom surface of the groove body 12 through the connecting sleeve 78.

[0052] The working principle and working process of the present invention are as follows:

[0053] 1. Threading path: The knotted rope 8 passes through the guide ring 13 and through the gap between the pressing plate 42 of the clamping assembly 4 and the bottom plate 51 of the clamping bottom plate assembly 5 (see Figure 2 , Figure 3 After passing through the gap, the knotted rope 8 successively passes around the guide shaft 32 of the guide frame 3, the U-shaped support ring 15 and the pulley 2, and then passes through the needle hole of the large needle 9 and is inserted into the large needle 9. The end of the knotted rope is clamped in the rope clamping disk of the knotter, and is ready for bundling and knotting.

[0054] 2. The formation principle of the clamping force of the rope clamping mechanism: When the baler is full of grass and is tying a knot or the lifting mechanism moves upward, the rodless chamber of the tensioning cylinder 6 is extended, and the piston rod drives the spring connecting rod 7 to move rightward when the piston rod is extended. The movement of the screw rod 71 drives the rotating body 41 of the clamping assembly 4 to rotate upward, thereby clamping the knotted rope between the pressing plate 42 and the bottom plate 51. The size of the clamping force is determined according to the raw material properties and moisture content of the bale, so as to ensure that the rope buckle formed when tying the bale is firm and reliable and does not fall apart.

[0055] When oil enters the oil rod chamber, the piston rod returns and the clamped knotted rope 8 is in a natural state.

[0056] 3. Adjustment method of clamping force:

[0057] By adjusting the distance between the first nut 72 and the second nut 77 to increase or decrease the compression degree of the compression spring 76, the rigidity of the compression spring 76 can be increased or decreased. The position of the pressing assembly 4 can be adjusted by replacing the spacer 73 with different lengths.

[0058] The clamping force can be adjusted by the above two adjustment methods to ensure the quality of the rope buckle when tying the bundle.

[0059] The present invention can automatically clamp the knotted rope 8 and can adapt to square straw bale balers with high automation requirements. The present invention can adjust the clamping force so that the clamping force is determined according to the raw material properties and moisture content of the straw bale, so as to ensure that the rope buckle formed during the bundling and knotting is firm and reliable and does not fall apart, thereby ensuring the quality of the rope buckle.

[0060] The above descriptions are only some specific implementation methods of the present invention, and the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A rope clamping mechanism for a knotter of a square straw bale baler, characterized in that: It includes a frame, a pulley, a guide frame, a clamping assembly, a clamping base plate assembly, a cylinder and a spring connecting rod; The frame body is a rectangular strip, provided with a guide ring, a pulley is installed on the side of the frame body, and the guide frame is hinged on the pulley seat; The oil cylinder and the spring connecting rod are installed on the bottom surface of the frame, and the oil cylinder is connected to the spring connecting rod; The clamping base plate assembly is fixedly connected to the bottom surface of the frame, one end of the clamping assembly is fixedly connected to the spring connecting rod, and the other end is hinged to the frame; The knotted rope passes through the guide ring, passes through the gap between the clamping base plate assembly and the clamping assembly, bypasses the guide frame and the pulley, and passes through the large needle; the cylinder telescopes to drive the spring connecting rod to move, and the spring connecting rod drives the clamping assembly to rotate, clamping the knotted rope.

2. The rope clamping mechanism of the knotter of the square grass bale baler according to claim 1, characterized in that: The frame body includes a cylinder seat, a tank body, a guide ring, a pulley seat, a U-shaped support ring and a hinge shaft; The cross-section of the trough body is a groove shape, the cylinder seat is fixed to the end of the bottom surface of the trough body, the pulley seat is fixed to one side of the trough body, the guide ring is fixed to the other side of the trough body, the U-shaped support ring is fixed to the pulley seat, the hinge shaft is fixed to the U-shaped support ring, and the guide frame is hinged on the hinge shaft.

3. The rope clamping mechanism of the knotter of the square grass bale baler according to claim 1, characterized in that: The wheel body of the pulley is provided with a V-shaped groove.

4. The rope clamping mechanism of the knotter of the square grass bale baler according to claim 1, characterized in that: The pulley comprises a wheel body, a bearing and a sleeve; The wheel body is connected with the shaft sleeve through the bearing, the shaft sleeve is sleeved on the bolt, and the bolt is installed on the pulley seat.

5. The rope clamping mechanism of the knotter of the square grass bale baler according to claim 1, characterized in that: The guide frame includes a V-shaped strip and a guide shaft; The guide shaft is vertically fixed between two V-shaped strips parallel to each other.

6. The rope clamping mechanism of the knotter of the square grass bale baler according to claim 1, characterized in that: The clamping assembly includes a rotating body, a pressing plate and a spring; The rotating body is hinged to the bottom surface of the frame body, the pressing plate is connected to the rotating body, one end of the spring is fixed to the rotating body, and the other end is fixed to the pressing plate; a guide hole is arranged on the pressing plate.

7. The rope clamping mechanism of the knotter of the square grass bale baler according to claim 6, characterized in that: The clamping base plate assembly includes a base plate and a guide column; The bottom plate is fixed to the bottom surface of the frame body, the guide column is vertically fixed to the bottom plate, and the guide column passes through the guide hole on the pressing plate.

8. The rope clamping mechanism of the knotter of the square grass bale baler according to claim 1, characterized in that: The spring connecting rod comprises a screw rod, a first nut, a spacer, a positioning block, a spring seat, a compression spring and a second nut; The first nut, the spacer, the positioning block, the spring seat, the compression spring and the second nut are sequentially mounted on the screw rod, and the compression assembly is fixedly connected to the positioning block; The position of the clamping assembly is adjusted by the spacer, and the compression degree of the compression spring is increased or decreased by adjusting the first nut and the second nut.

9. The rope clamping mechanism of the knotter of the square grass bale baler according to claim 8, characterized in that: It also includes a connecting sleeve, which is sleeved on the screw rod, and the spring connecting rod is connected to the frame body through the connecting sleeve.

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