Hydraulic bale density adjusting device of square bale bundling machine

Abstract

The invention provides a hydraulic bale density adjusting device of a square bale bundling machine, and belongs to the technical field of agriculture and animal husbandry machinery. The device is mainly composed of a rack, a hinge shaft III, a hinge shaft VI, a forming chamber side plate, a wear-resisting plate, a roller, a hinge shaft II, a hinge shaft I, a pressurizing plate, a side stand column, an oil cylinder lower arm, a density adjusting oil cylinder, a roller shaft, a limiting ring, a side plate connecting pin, an oil cylinder upper arm, an upper pressurizing beam connecting pin, an upper pressurizing beam and a lower pressurizing beam. During bundling operation, the mechanism can adjust the volume of the forming chamber formed by the forming chamber side plate and the upper pressurizing beam through the density adjusting oil cylinder, so that the friction force between the bale and the inner wall of the forming chamber is increased or decreased, and the purpose of adjusting the compression density of the square bale is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of modern agricultural and animal husbandry machinery and relates to a straw bale density regulating device on a square straw bale baler. Background Art

[0002] The square bale baler (abbreviated as square baler) is one of the important equipment in the forage harvesting machinery in my country's agricultural and animal husbandry fields. Its main function is to collect, transport, feed, compress and bundle loose forage grass into a rectangular bale. The bale density adjustment device is one of the main working parts of the square baler. It is used to adjust the density of the compressed bale and has a direct impact on the bale density and the regularity of the bale shape.

[0003] At present, the existing square balers in the domestic market are mainly small and medium-sized, and their density adjustment mechanisms are mostly spring-loaded manual density adjustment devices, which have problems such as low bale density, low degree of automation and low density adjustment accuracy. There is a lack of square bale density adjustment devices that can produce high-quality, high-density bales and have a high degree of automation. Summary of the invention

[0004] The present invention provides a hydraulic bale density adjustment device for a square straw baler, which can be applied to various types of square straw balers. During the baling operation, the device can adjust the density of the square straw bale by adjusting the volume of the forming chamber through the hydraulic cylinder according to actual production needs, thereby producing high-quality and high-density square straw bales.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A hydraulic bale density adjustment device for a square bale baler mainly comprises a frame, an articulated shaft III, an articulated shaft VI, a side plate of a forming chamber, a wear-resistant plate, a roller, an articulated shaft II, an articulated shaft I, a pressure plate, a side column, a lower arm of a cylinder, a density adjustment cylinder, a roller shaft, a limit ring, a side plate connecting pin, an upper arm of a cylinder, an upper pressure beam connecting pin, an upper pressure beam, and a lower pressure beam. The lower pressure beam is welded to the frame. The lower arm of the cylinder is articulated to the frame through an articulated shaft III, and the cylinder arm can rotate around the articulated shaft. The roller is articulated and installed at the ends of the lower arm of the cylinder and the upper arm of the cylinder close to the inside through the roller shaft. The side column is connected to the frame by welding. The side plate of the forming chamber is articulated to the side column through the side plate connecting pin, and the side plate of the forming chamber can rotate around the side plate connecting pin. The upper pressure beam is articulated to the side column through the upper pressure beam connecting pin. The upper pressure beam is welded to the pressure plate. The upper pressure beam can rotate up and down around the upper pressure beam connecting pin. The upper pressure beam, the molding chamber side plate and the lower pressure beam together form the molding chamber. The pressure plate is connected to the upper arm of the oil cylinder through the hinge shaft II. The upper arm of the oil cylinder is hinged with rollers through roller shafts at the end positions close to the molding chamber side plates. Wear-resistant plates are welded to the molding chamber side plates at the positions in contact with the rollers. The cylinder barrel hinge ear of the density adjustment oil cylinder is connected to the lower arm of the oil cylinder through the hinge shaft IV, and the cylinder push rod hinge ear is connected to the upper arm of the oil cylinder through the hinge shaft I. The limit ring is installed behind the wear-resistant plate corresponding to the roller on the lower arm of the oil cylinder, and the roller shaft passes through the middle of the limit ring. The bale density is adjusted by changing the volume of the molding chamber, thereby adjusting the friction between the bale and the inner wall of the molding chamber, so as to achieve the purpose of adjusting the compression density of the square bale.

[0007] When the density of the bale needs to be reduced, the left and right density adjustment cylinders act synchronously, and the piston rod is pushed upward. At this time, the distance between the upper arm of the cylinder and the lower arm of the cylinder increases, and the upper arm of the cylinder will rotate out of the molding room around the hinge axis II until the upper arm of the cylinder is connected to the pressure plate; at the same time, the lower arm of the cylinder will also rotate out of the molding room around the hinge axis III until the roller shaft is connected to the upper end of the limit ring. Due to the rotation of the cylinder arm, the roller will move to the outside of the two molding chamber side plates and break away from the wear-resistant plate. In the process of the grass being pushed into the molding chamber by the piston, the formed bale will give the molding chamber side plate an outward thrust, causing the molding chamber side plate to rotate outward around the side plate connecting pin, the molding chamber volume becomes larger, the friction with the bale is reduced, and the density becomes smaller. When the piston rod continues to push upward, the cylinder arm will no longer rotate, and the upper arm of the cylinder will lift the pressure plate connected to it upward. The pressure plate is welded to the upper pressure beam, so the upper pressure beam will rotate upward around the upper pressure beam connecting pin. At this time, the upper wall of the forming chamber also expands outward, further increasing the volume and further reducing the density of the straw bale.

[0008] When the bale density needs to be increased, the density adjustment cylinders on both sides retract the piston rods at the same time, the distance between the upper arm of the cylinder and the lower arm of the cylinder is reduced, and the piston rod drives the upper arm of the cylinder to move downward, thereby driving the pressure plate and the upper pressure beam to move downward, causing the upper wall of the molding chamber to shrink downward. At the same time, the upper arm of the cylinder will rotate around the hinge shaft II into the molding chamber. At this time, the roller of the upper arm of the cylinder will contact the wear-resistant plate and squeeze the side plate of the molding chamber inward. The side plate will rotate inward around the side plate connecting pin, reducing the width of the molding chamber and further reducing the volume of the molding chamber. When the roller shaft contacts the inner side of the limit ring, it reaches the limit position. At this time, the volume of the molding chamber reaches the minimum, the friction between the molding chamber and the bale reaches the maximum, and the density of the bale also reaches the maximum. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is an axonometric view of the present invention.

[0010] Figure 2 It is a left view of the present invention.

[0011] In the attached drawings: 1. frame, 2. articulated axis III, 3. articulated axis VI, 4. molding chamber side plate, 5. wear-resistant plate, 6. roller, 7. articulated axis II, 8. articulated axis I, 9. pressure plate, 10. side column, 11. cylinder lower arm, 12. density adjustment cylinder, 13. roller shaft, 14. limit ring, 15. side plate connecting pin, 16. cylinder upper arm, 17. upper pressure beam connecting pin, 18. upper pressure beam, 19. lower pressure beam. DETAILED DESCRIPTION

[0012] The present invention is described in detail with reference to the accompanying drawings:

[0013] A hydraulic bale density adjustment device for a square bale baler comprises a frame (1), an articulated shaft III (2), an articulated shaft VI (3), a molding chamber side plate (4), a wear-resistant plate (5), a roller (6), an articulated shaft II (7), an articulated shaft I (8), a pressure plate (9), a side column (10), a cylinder lower arm (11), a density adjustment cylinder (12), a roller shaft (13), a limit ring (14), a side plate connecting pin (15), a cylinder upper arm (16), an upper pressure beam connecting pin (17), an upper pressure beam (18), and a lower pressure beam (19). The lower pressure beam (19) is welded to the frame (1). The cylinder lower arm (11) is articulated to the frame (1) via the articulated shaft III (2), and the cylinder arm can rotate around the articulated shaft. The roller (6) is hingedly mounted on the ends of the lower arm (11) and the upper arm (16) of the oil cylinder respectively near the inside through the roller shaft (13). The side column (10) is connected to the frame (1) by welding. The molding chamber side plate (4) is hingedly connected to the side column (10) through the side plate connecting pin (15), and the molding chamber side plate (4) can rotate around the side plate connecting pin (15). The upper pressure beam (18) is hingedly connected to the side column (11) through the upper pressure beam connecting pin (17). The upper pressure beam (18) is welded to the pressure plate (9). The upper pressure beam (18) can rotate up and down around the upper pressure beam connecting pin (17). The upper pressure beam (18), the molding chamber side plate (4), and the lower pressure beam (19) together constitute the molding chamber. The pressure plate (9) is connected to the upper arm (16) of the oil cylinder through the hinge shaft II (7). The upper arm (16) of the oil cylinder is respectively hinged with rollers (6) at the end positions close to the side plates (4) of the molding chamber through roller shafts (13). The side plates (4) of the molding chamber are welded with wear-resistant plates (5) at the positions in contact with the rollers (6). The cylinder barrel hinge ear of the density adjustment oil cylinder (12) is connected to the lower arm (11) of the oil cylinder through the hinge shaft IV (3), and the cylinder push rod hinge ear is connected to the upper arm (16) of the oil cylinder through the hinge shaft I (8). The limiting ring (14) is installed behind the wear-resistant plate (5) corresponding to the roller (6) on the lower arm (11) of the oil cylinder, and the roller shaft (13) passes through the middle of the limiting ring (14). The bale density is adjusted by changing the volume of the molding chamber, thereby adjusting the friction between the bale and the inner wall of the molding chamber, so as to achieve the purpose of adjusting the compression density of the square bale.

[0014] When the density of the straw bale needs to be reduced, the left and right density adjustment cylinders (12) are synchronously actuated, and the piston rod is pushed upward. At this time, the distance between the upper cylinder arm (16) and the lower cylinder arm (11) increases, and the upper cylinder arm (16) rotates out of the molding chamber around the hinge axis II (7) until the upper cylinder arm (16) and the pressure plate (9) are connected; at the same time, the lower cylinder arm (11) also rotates out of the molding chamber around the hinge axis III (2) until the roller shaft (13) and the upper end of the limit ring (14) are connected. Due to the rotation of the cylinder arm, the roller (6) moves to the outside of the two molding chamber side plates (4) and is out of contact with the wear-resistant plate (5). In the process of the straw being pushed into the molding chamber by the piston, the formed straw bale will give the molding chamber side plates (4) an outward thrust, causing the molding chamber side plates (4) to rotate outward around the side plate connecting pin (15), the molding chamber volume increases, the friction with the straw bale decreases, and the density decreases. When the piston rod continues to push upward, the oil cylinder arm will no longer rotate, and the oil cylinder upper arm (16) will lift the pressure plate (9) connected with it upward. The pressure plate (9) is welded to the upper pressure beam (18), so the upper pressure beam (18) will rotate upward around the upper pressure beam connecting pin (17). At this time, the upper wall of the forming chamber also expands outward, further increasing the volume, so that the density of the straw bale is further reduced.

[0015] When the density of the straw bale needs to be increased, the density adjustment cylinders (12) on both sides retract the piston rods at the same time, the distance between the cylinder upper arm (16) and the cylinder lower arm (11) is reduced, and the piston rod drives the cylinder upper arm (16) to move downward, thereby driving the pressure plate (9) and the upper pressure beam (18) to move downward, so that the upper wall of the molding chamber shrinks downward. At the same time, the cylinder upper arm (16) rotates around the hinge shaft II (7) into the molding chamber. At this time, the roller (6) of the cylinder upper arm (16) contacts the wear-resistant plate (5) and squeezes the molding chamber side plate (4) inward. The side plate will rotate inward around the side plate connecting pin (15), reducing the width of the molding chamber and further reducing the volume of the molding chamber. When the roller shaft (13) contacts the inner side of the limit ring (14), it reaches the limit position. At this time, the volume of the molding chamber reaches the minimum, the friction between the molding chamber and the straw bale reaches the maximum, and the straw bale density also reaches the maximum.

[0016] As described above, although the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the invention itself. Various changes in form and details may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A hydraulic bale density adjustment device for a square bale baler, comprising a frame (1), an articulated shaft III (2), an articulated shaft VI (3), a forming chamber side plate (4), a wear-resistant plate (5), a roller (6), an articulated shaft II (7), an articulated shaft I (8), a pressure plate (9), a side column (10), a cylinder lower arm (11), a density adjustment cylinder (12), a roller shaft (13), a limit ring (14), a side plate connecting pin (15), an oil cylinder upper arm (16), an upper pressure beam connecting pin (17), an upper pressure beam (18), The lower pressure beam (19) is welded to the frame (1), the lower pressure beam (25) is hingedly connected to the frame (1) through the hinge shaft III (2), the cylinder arm can rotate around the hinge shaft, the roller (6) is hingedly installed on the ends of the cylinder lower arm (11) and the cylinder upper arm (16) close to the inside through the roller shaft (13), the side column (10) is connected to the frame (1) by welding, the molding chamber side plate (4) is hingedly connected to the side column (10) through the side plate connecting pin (15), and the molding chamber side plate (4) The upper pressure beam (18) can rotate around the side plate connecting pin (15); the upper pressure beam (18) is hinged to the side column (11) through the upper pressure beam connecting pin (17); the upper pressure beam (18) is welded to the pressure plate (9); the upper pressure beam (18) can rotate up and down around the upper pressure beam connecting pin (17); the upper pressure beam (18), the molding chamber side plate (4) and the lower pressure beam (19) together form the molding chamber; the pressure plate (9) is connected to the oil cylinder upper arm (16) through the hinge shaft II (7); the oil cylinder upper arm (16) is respectively located near the molding chamber side plate (4) and the lower pressure beam (19). A roller (6) is hingedly connected at the end position through a roller shaft (13); a wear-resistant plate (5) is welded to the molding chamber side plate (4) at a position where the side plate contacts the roller (6); a cylinder articulation ear of the density regulating oil cylinder (12) is connected to the oil cylinder lower arm (11) through an articulation shaft IV (3); a cylinder push rod articulation ear is connected to the oil cylinder upper arm (16) through an articulation shaft I (8); a limiting ring (14) is installed behind the wear-resistant plate (5) corresponding to the roller (6) on the oil cylinder lower arm (11); and the roller shaft (13) passes through the middle of the limiting ring (14).

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