A self-propelled forage round bale baler

Abstract

The invention discloses a self-propelled grass round bale baler, which relates to the technical field of grass balers, including a baling device and a tractor head for pulling the baling device to move, the baling device includes a shell, a material picking and feeding component, a grass twisting component, a rounding component and a power component, the grass twisting component has a fixed conveyor belt and a movable conveyor belt with reverse transmission, the movable conveyor belt twists the grass into pieces and conveys them to the rounding component when it is in contact with the fixed conveyor belt, and the movable conveyor belt conveys the grass into balls and conveys them to the rounding component when it is separated from the fixed conveyor belt; the rounding component includes a core guide roller group, a movable adjusting roller, a plurality of supporting rollers, a rounding belt wound around the adjusting roller and the plurality of supporting rollers, and a control structure for controlling the tension of the rounding belt. The invention controls the position of the adjusting roller, and regenerates a new grass core in the coring area during the process of grass bale wrapping, thereby realizing parallel operation and automatic continuous operation.

Description

Technical Field

[0001] The invention relates to the technical field of forage balers, and in particular to a self-propelled forage round bale baler. Background Art

[0002] Animal husbandry is an important part of agriculture, and forage is an important source of feed for animal husbandry. Using a forage round bale baler can improve the production efficiency and storage quality of forage, provide sufficient feed guarantee for animal husbandry, and thus promote the development of animal husbandry. In order to facilitate the transportation and storage of forage, after the forage is harvested, a forage baler is usually used to make the forage into round bales. The baler generally adopts a single-bin forming structure. Although this single-bin structure can basically complete the work of material picking and baling, when a roll of grass bale is formed, it needs to be stopped for film wrapping, which greatly affects the efficiency of grass collection.

[0003] In order to improve the efficiency of forage baling and collection, double-bin balers that can bale without stopping during the collection process have appeared on the market. For example, Chinese utility model patent with publication number CN208739636U discloses a double-bin baling solution. Although the double-bin solution of this patent provides a non-stop solution, it also has certain defects. First, the small baling chamber and the large baling chamber are switched, and an additional material switching control mechanism is set. Second, the double-bin design requires twice the volume of the prior art, which increases the cost of the equipment, has low feeding efficiency, a relatively complex structure, and a cumbersome assembly process. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of double-bin design of balers that can work continuously in the prior art, equipment cost, low feeding efficiency, relatively complex structure and cumbersome assembly process, and to propose a self-propelled forage round bale baler.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A self-propelled forage round bale baler comprises a baling device and a tractor head for pulling the baling device to move, wherein the baling device comprises a housing, a material picking and feeding assembly, a forage twisting assembly, a rounding assembly and a power assembly, wherein:

[0007] The housing comprises a front housing, a rear cover and a moving wheel arranged below the front housing, the front housing and the rear cover are hinged to each other, and a hydraulic push-pull structure for controlling the opening and closing of the rear cover is arranged on the front housing and the rear cover;

[0008] The picking and feeding component is used for picking up the forage material on the moving path of the baler and conveying it to the forage twisting component;

[0009] The forage twisting assembly comprises a fixed conveyor belt and a movable conveyor belt. When the movable conveyor belt is in contact with the fixed conveyor belt, the forage is twisted into sheets and transported to the rounding assembly. When the movable conveyor belt is separated from the fixed conveyor belt, the forage is balled and transported to the rounding assembly.

[0010] The rounding assembly includes a coring guide roller group, a movable adjusting roller, a plurality of supporting rollers, a rounding belt wound around the adjusting roller and the plurality of supporting rollers, and a control structure for controlling the tension of the rounding belt. A coring area is formed above the coring guide roller group, a circular rounding area is formed in the area surrounded by the adjusting roller and the plurality of supporting rollers, a transition gap between the coring area and the rounding area is formed between the adjusting roller and the supporting roller at the bottom, and after the grass forms a grass core in the coring area, the grass enters the rounding area through the transition gap and continuously expands to form a columnar grass bale, and the adjusting roller can drive the rounding belt to block the transition gap, thereby forming a new grass core while the grass bale is unloaded.

[0011] Preferably, the core-forming guide roller group includes a plurality of core-forming rollers rotatably disposed on the front shell body, the outer circumferential surfaces of the plurality of core-forming rollers are close to each other, and the arrangement path of the plurality of core-forming rollers is in an arc shape with a concave surface facing the core-forming area.

[0012] Preferably, a guide groove concentrically arranged with the bundling area is provided on the front shell, the adjusting roller is arranged in the guide groove, and a hydraulic push rod is arranged outside the front shell, the telescopic end of the hydraulic push rod is rotatably connected to the rotating shaft of the adjusting roller, and the other end is rotatably connected to the front shell.

[0013] Preferably, the control structure includes a plurality of control rollers, the control rollers pass through a guide groove 2 opened on the front shell, a hydraulic push rod 2 arranged along the guide groove 2 is fixedly mounted outside the front shell, the telescopic end of the hydraulic push rod 2 is rotatably connected to the control roller, and the control roller abuts against the outer side surface of the round belt.

[0014] Preferably, a plurality of mutually parallel positioning rods are rotatably arranged in the shell, and the plurality of positioning rods are distributed along the outer edge contour of the bundling area.

[0015] Preferably, the fixed conveyor belt includes two fixed rollers rotatably arranged on the front shell body and a conveyor belt one sleeved between the two fixed rollers, the movable conveyor belt includes an axial roller and two movable rollers, a conveyor belt two is sleeved between the axial roller and the two movable rollers, a variable speed transmission structure is arranged between the axial roller and one of the fixed rollers, wherein the axial roller is rotatably connected to the front shell body, the two movable rollers respectively pass through guide grooves three opened on the front shell body, and a driving arm rotatable around the axis of the axial roller is arranged on the front shell body, and the movable roller is rotatably arranged on the driving arm.

[0016] Preferably, the central roller and the two movable rollers are staggered so that the conveyor belt 2 forms a triangular structure, wherein the side of the conveyor belt 2 close to the material picking and feeding assembly is an elevated surface, and the portion of the conveyor belt 2 located between the two movable rollers is a twisted surface, and the twisted surface can fit with the surface of the conveyor belt 1.

[0017] Preferably, the speed change transmission structure includes a transition shaft rotatably arranged on the front housing, sprocket 1 is fixedly mounted on the axial roller shaft and the transition shaft, the two sprockets 1 are connected via a chain 1 transmission, a transmission gear 1 is fixedly mounted on one of the fixed roller shafts, and a transmission gear 2 is fixedly mounted on the transition shaft, and the transmission gear 1 and the transmission gear 2 are meshed with each other.

[0018] Preferably, the effective number of teeth of transmission gear one is smaller than that of transmission gear two.

[0019] Preferably, the hydraulic push-pull structure includes a mounting rod 1 fixedly arranged on the top of the front shell, a hydraulic push rod 3 is rotatably arranged on the mounting rod 1, the telescopic end of the hydraulic push rod 3 is rotatably connected to a mounting rod 2 fixedly arranged on the rear cover, and the axis of the hinge point of the front shell and the rear cover coincides with the support roller located on the top of the rear cover.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] Improve production efficiency and automation: When traditional balers are wrapping the net, the grass needs to be transported and the operation needs to be suspended, which not only wastes time but also increases the frequency of manual intervention. The forage baler of the present invention controls the position of the adjusting roller to separate the coring area and the bale circle area. During the process of wrapping the bale, the grass core generation process of the next bale is directly started, and a new grass core is regenerated in the coring area, thus realizing parallel operation and automatic continuous operation. There is no need to stop the machine during the process of wrapping the bale, which improves production efficiency and operation continuity. In addition, compared with the double-bin baler, the automatic continuous baling of the present invention adopts a single and efficient studio structure, does not need to switch the feeding position, simplifies the control mechanism, reduces the number of control components, thereby reducing the failure rate and improving the reliability and stability of the equipment.

[0022] Improve the quality of straw bales and enhance market competitiveness: The present invention realizes precise control of the shape of grass during the baling process through the design of the grass twisting component. When the straw bale is wrapped with the net, the fixed conveyor belt and the movable conveyor belt are synchronously controlled to separate, so that when the grass core is generated, the grass enters the core-forming area in a scattered state to form a loose grass core, which helps to better distribute the grass fiber in the subsequent baling process and avoid the problem of poor air permeability caused by excessive internal compaction. In the baling stage, the fixed conveyor belt and the movable conveyor belt are twisted together to twist the grass into a belt shape. The grass pieces are then wrapped and tied into a round shape. The final bale has the structural characteristics of "loose inside and tight outside", which not only ensures the compactness and stability of the bale, but also improves the air permeability and storage performance of the bale, which is beneficial to the long-term preservation and transportation of forage, and significantly improves the market competitiveness of the product. In addition, the forage can be arranged horizontally during the twisting process so that the forage can be staggered and bitten in the axial direction of the bale. This design not only improves the compactness and stability of the bale, but also enhances the compressive strength and weathering resistance of the bale, which is beneficial to the long-term preservation and transportation of forage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a self-propelled forage round bale baler proposed by the present invention;

[0024] Figure 2 A schematic diagram of the structure of a baling device in a self-propelled forage round bale baler proposed by the present invention;

[0025] Figure 3 A side structural schematic diagram of a baling device in a self-propelled forage round bale baler proposed by the present invention;

[0026] Figure 4 A schematic cross-sectional view of a baling device in a self-propelled forage round bale baler proposed by the present invention;

[0027] Figure 5 A schematic diagram of the structure of a material picking and feeding assembly in a self-propelled forage round bale baler proposed by the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of a grass twisting component in a self-propelled grass round bale baler proposed by the present invention;

[0029] Figure 7 A schematic structural diagram of a self-propelled forage round bale baler in a coring state;

[0030] Figure 8 A schematic diagram of the structure of a self-propelled round hay baler in a round hay baling state proposed by the present invention;

[0031] Fig. 9The present invention provides a schematic structural diagram of a self-propelled forage round bale baler in a bale discharging state.

[0032] In the figure: 1. tractor head; 2. baling equipment; 3. shell; 31. front shell; 311. guide slot 1; 312. hydraulic push rod 1; 313. guide slot 2; 314. hydraulic push rod 2; 315. guide slot 3; 316. drive arm; 317. hydraulic push rod 3; 32. rear cover; 4. pick-up and feeding assembly; 41. mounting shell; 42. pick-up roller; 43. feeding roller; 44. motor 1; 45. transmission gear 3; 46. pick-up bar; 47. feeding claw; 48. spiral piece; 5. forage twisting assembly; 51. fixed conveyor belt; 511. fixed roller; 512. conveyor belt one; 52, movable conveyor belt; 521, axis roller; 522, movable roller; 523, conveyor belt two; 53, transmission gear one; 54, transmission gear two; 55, motor two; 6, rounding assembly; 61, coring guide roller group; 611, coring roller; 62, supporting roller; 63, adjusting roller; 64, rounding belt; 65, coring area; 66, rounding area; 67, transition notch; 68, control roller; 69, positioning rod; 7, power assembly; 71, power shaft; 72, expansion shaft; 73, motor three; 74, transmission; 8, hay bale; 9, hay core; 10, net roll; 11, movable arm. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings.

[0034] Reference Figure 1-9 A self-propelled round hay baler includes a baling device 2 and a tractor head 1 for pulling the baling device 2. After the hay is harvested and dried, it will be stacked into strips along a straight line. When collecting hay, the user drives the tractor head 1 and pulls the baling device 2 along the hay strips. The baling device 2 picks up and feeds the hay during the movement and finally bales it into round bales for discharge.

[0035] The baling device 2 includes an outer shell 3, a material picking and feeding component 4, a grass twisting component 5, a rounding component 6 and a power component 7. The outer shell 3 is the frame of the baling device 2 and plays a role of support and accessory installation. The power component 7 is the main power source of the baling device 2 in this baler and provides power for the rounding component 6. The forage is picked up into the outer shell 3 by the material picking and feeding component 4, and the grass is subjected to secondary processing by the grass twisting component 5 and sent to the rounding component 6 for coring and baling. During the process of wrapping the grass bale 8, the rounding component 6 can directly start the grass core 9 generation process of the next grass bale 8, thereby realizing automatic and continuous operation. There is no need to stop the machine during the process of wrapping the grass bale 8, thereby improving production efficiency and operation continuity.

[0036] The shell 3 includes a front shell 31, a rear cover 32 and moving wheels arranged under the front shell 31, and the moving wheels support the shell 3 to move, wherein the tire pitch of the tractor head 1 and the tire pitch of the two moving wheels need to be larger than the width of the haystack to avoid crushing the haystack during movement. The front shell 31 and the rear cover 32 are hinged to each other, and a hydraulic push-pull structure for controlling the opening and closing of the rear cover 32 is provided on the front shell 31 and the rear cover 32. When the rear cover 32 is closed, the front shell 31 and the rear cover 32 form a complete shell 3. After the rear cover 32 is opened, the end of the front shell 31 will be exposed for unloading of the hay bale 8.

[0037] Reference Figure 4-5 The picking-up and feeding assembly 4 is used to pick up the forage material on the moving path of the baler and convey it to the forage twisting assembly 5. The picking-up and feeding assembly 4 is a common structure on the existing balers. In this embodiment, the picking-up and feeding assembly 4 includes a mounting shell 41 installed at the lower side of the forward direction of the outer shell 3, and a picking-up roller 42 and two feeding rollers 43 installed side by side are rotatably arranged in the mounting shell 41, wherein a rotating shaft of one feeding roller 43 is fixedly connected to an output end of a motor 1 44 fixedly installed on the mounting shell 41, and a sprocket 2 is installed on the rotating shaft of the other feeding roller 43 and the rotating shaft of the picking roller 42, and the two sprockets 2 are connected by a chain 2 for transmission, and a transmission gear 3 45 is installed on the rotating shafts of the two feeding rollers 43, and the two transmission gears 3 45 are meshed with each other. After the motor 1 44 is started, the two feeding rollers 43 are driven to rotate in opposite directions. The picking roller 42 is driven to rotate by the second chain at the same time. The outer peripheral surface of the picking roller 42 is provided with a plurality of picking strips 46 with curved ends. The ends of the picking strips 46 are close to the ground. The picking roller 42 rotates to drive the picking strips 46 to rotate to hook the grass pile on the ground and throw it to one side of the feeding roller 43. The feeding roller 43 is provided with a plurality of feeding claws 47. The feeding claws 47 on the two feeding rollers 43 are axially staggered and spaced. The two feeding rollers 43 rotate in opposite directions to bite the grass and transport it to the other side. In addition, spiral blades 48 with opposite rotation directions are provided at both ends of the feeding roller 43 to drive the grass to converge to the middle and ensure that the width of the grass meets the width requirement of baling when feeding. The above is an implementation method of the picking and feeding component 4. The structures with the picking and feeding function in the prior art can be replaced, which will not be elaborated here.

[0038] The forage twisting assembly 5 includes a fixed conveyor belt 51 and a movable conveyor belt 52. The forage fed by the picking and feeding assembly 4 enters between the fixed conveyor belt 51 and the movable conveyor belt 52, and is transported to the baling assembly 6 through reverse transmission by the fixed conveyor belt 51 and the movable conveyor belt 52.

[0039] Reference Figure 3-9The rounding assembly 6 includes a coring guide roller group 61, a movable adjusting roller 63, a plurality of supporting rollers 62, a rounding belt 64 wound around the adjusting roller 63 and the plurality of supporting rollers 62, and a control structure for controlling the tension of the rounding belt 64. A coring area 65 is formed above the coring guide roller group 61. A circular rounding area 66 is formed in the area surrounded by the adjusting roller 63 and the plurality of supporting rollers 62. A transition gap 67 between the coring area 65 and the rounding area 66 is formed between the adjusting roller 63 and the supporting roller 62 at the bottom. The power assembly 7 drives the coring guide roller group 61 and the plurality of supporting rollers 62 to rotate. The rounding belt 64 moves synchronously with the supporting roller 62 in a taut state. After the grass core 9 is formed in the coring area 65, the grass enters the rounding area 66 through the transition gap 67 and continuously expands to form a columnar shape. In the initial state of the straw bale 8, the control structure controls the rounding belt 64 to be in a taut state, so that the position of the rounding belt 64 and the transition notch 67 coincide with each other, and the straw delivered by the straw twisting assembly 5 first enters the coring area 65, and with the rotation of the coring guide roller group 61, the straw ball is rotated into a core, and the diameter gradually increases to form a straw core 9, and as the straw core 9 gradually increases, it squeezes the rounding belt 64, so that the rounding belt 64 bends toward the rounding area 66, and the straw core 9 gradually transitions to the rounding area 66 during the process of the bale becoming larger, and finally, the finished straw bale 8 is gradually formed under the drive of the rounding belt 64, and in the process of the straw core 9 being bundled, the rounding belt 64 is always under a suitable tension due to the cooperation of the control structure, and also has a certain restraining effect on the straw bale 8, making the straw bale 8 tight.

[0040] After the bale 8 is formed, it needs to be wrapped with a net to prevent the bale 8 from becoming loose. In this embodiment, a net wrapping device is provided at the bottom of the rear cover 32. The net wrapping device is a prior art and mainly includes a net roll 10 and a movable arm 11. The movable end of the net roll 10 is provided on the movable arm 11. The movable arm 11 drives the end of the net roll 10 to fit the bale 8 so that the end of the net roll 10 is transferred to the bale 8. As the bale 8 rotates, the net wrapping is completed. Finally, the net roll 10 is cut off by the cutting knife on the movable arm 11 and the end of the net roll 10 is driven to reset. The wrapped bale 8 can be discharged outward after the rear cover 32 is opened by the hydraulic push-pull structure. Since the grass material is still not In order to realize non-stop conveying, the adjusting roller 63 can be driven to drive the baling belt 64 to block the transition gap 67 during the web wrapping process, and the adjusting roller 63 can be moved downward to drive the baling belt 64 to isolate the coring area 65 and the rounding area 66 downward. At this time, the grass bale 8 is web wrapped in the rounding area 66, and the grass material subsequently conveyed in is cored in the coring area 65, so that a new grass core 9 is formed while the grass bale 8 is web wrapped and unloaded. Compared with the double-bin baler, it adopts a single and efficient studio structure, the equipment is smaller in size, and continuous feeding is always carried out without switching the feeding position, thereby improving the reliability and stability of the equipment.

[0041] The movable conveyor belt 52 can change its position. When the movable conveyor belt 52 is in contact with the fixed conveyor belt 51, the grass is twisted into sheets and transported to the rounding component 6. When the movable conveyor belt 52 is separated from the fixed conveyor belt 51, the grass is balled and transported to the rounding component 6. The position change of the movable conveyor belt 52 is synchronized with the position change of the adjusting roller 63. When the adjusting roller 63 drives the rounding belt 64 to isolate the coring area 65 and the rounding area 66 downward to generate a new grass core 9, the movable conveyor belt 52 is controlled to separate from the fixed conveyor belt 51. At this time, the grass transported into the coring area 65 is in a loose state, so the grass core 9 will be in a relatively loose state. This helps to better distribute the grass fibers in the subsequent baling process and avoid the problem of poor air permeability caused by excessive internal compaction. When the grass bale 8 is discharged and the adjusting roller 63 is reset to bundle the newly generated grass core 9, the movable conveyor belt 52 is controlled to fit the fixed conveyor belt 51 to twist the grass into sheets for transportation. At this time, the sheet-like grass is wrapped around the grass core 9 into bundles with higher compactness. The final grass bale 8 has the structural characteristics of "loose inside and tight outside", which not only ensures the compactness and stability of the grass bale 8, but also improves the air permeability and storage performance of the grass bale 8, which is beneficial to the long-term preservation and transportation of grass and significantly improves the market competitiveness of the product.

[0042] Reference Figure 2-4 A guide groove 311 which is concentric with the bale circle area 66 is provided on the front shell 31, and the adjusting roller 63 is arranged in the guide groove 311. When the adjusting roller 63 moves, it moves along the guide groove 311 to ensure that the moving position of the adjusting roller 63 does not affect the forming of the straw bale 8, and a hydraulic push rod 312 is provided outside the front shell 31. The telescopic end of the hydraulic push rod 312 is rotatably connected to the rotating shaft of the adjusting roller 63, and the other end is rotatably connected to the front shell 31. The movement of the adjusting roller 63 in the guide groove 311 is controlled by the telescopic movement of the hydraulic push rod 312.

[0043] Reference Figure 2-4 The control structure includes a plurality of control rollers 68. The control rollers 68 pass through a second guide groove 313 provided on the front shell 31. A second hydraulic push rod 314 arranged along the second guide groove 313 is fixedly installed outside the front shell 31. When the second hydraulic push rod 314 is extended or retracted, it drives the control roller 68 to move in the second guide groove 313. The retractable end of the second hydraulic push rod 314 is rotatably connected to the control roller 68. The control roller 68 abuts against the outer side surface of the rounding belt 64. The rounding belt 64 is squeezed by moving the position of the control roller 68, thereby controlling the tension of the rounding belt 64, so that the rounding belt 64 can adapt to the state change of the rounding belt 64 during the forming process of the straw bale 8.

[0044] Reference Figure 7-9A plurality of mutually parallel positioning rods 69 are rotatably arranged in the outer shell 3. The plurality of positioning rods 69 are distributed along the outer edge contour of the baling area 66. After the bale 8 is formed, the baling belt 64 will be supported to the position of the positioning rods 69. The positioning rods 69 play a role in positioning the bale 8, thereby ensuring the product consistency and baling effect of the hay baling.

[0045] Reference Figure 7-9 The coring guide roller group 61 includes a plurality of coring rollers 611 rotatably arranged on the front shell body 31. The outer circumferential surfaces of the plurality of coring rollers 611 are close to each other, reducing the risk of grass falling from the gaps between the coring rollers 611 during the coring process. The arrangement path of the plurality of coring rollers 611 is in an arc shape with a concave surface facing the coring area 65, so that the grass can more easily form a columnar grass core 9 in the coring area 65 as the coring rollers 611 roll in the coring guide roller group 61, and the formed grass core 9 tends to transition to the rounding area 66.

[0046] In this embodiment, the power assembly 7 includes a power shaft 71 and an expansion shaft 72 rotatably arranged on the front shell body 31, and sprocket three is arranged on the rotating shaft of the power shaft 71, the expansion shaft 72, the support roller 62 located on the front shell body 31, and the support roller 62 located on the top of the rear cover 32, and multiple sprocket threes are connected by chain three. In addition, sprocket four is arranged on the rotating shaft of the power shaft 71, the expansion shaft 72 and the core-forming roller 611, and multiple sprocket fours are connected by chain four. A motor three 73 is arranged on the front shell body 31, and the motor three 73 is connected to the power shaft 71 by a transmission 74. The power shaft 71 is driven to rotate by the motor three 73, and then the expansion shaft 72, the support roller 62 and the core-forming roller 611 are driven to rotate.

[0047] Reference Figure 6-9The fixed conveyor belt 51 includes two fixed rollers 511 rotatably arranged on the front housing 31 and a conveyor belt 1 512 sleeved between the two fixed rollers 511. The conveyor belt 1 512 is in a taut state. When the fixed rollers 511 rotate, the conveyor belt 1 512 is driven to move. The movable conveyor belt 52 includes an axis roller 521 and two movable rollers 522. A conveyor belt 2 523 is sleeved between the axis roller 521 and the two movable rollers 522. The conveyor belt 2 523 is in a taut state. When the axis roller 521 and the two movable rollers 522 rotate, the conveyor belt 2 523 is driven to move. The axis roller 521 and one of the fixed rollers 521 rotate. A variable speed transmission structure is arranged between the rollers 511. Through the variable speed transmission structure, the fixed conveyor belt 51 and the movable conveyor belt 52 can move simultaneously with only one power source, and the movement speeds of the conveyor belt 1 512 and the conveyor belt 2 523 are inconsistent to generate friction, so that the grass is twisted when being transported between the conveyor belt 1 512 and the conveyor belt 2 523. During the twisting process, the forage can be arranged horizontally and the forage can be staggered and bitten in the axial direction of the straw bale 8, which not only improves the compactness and stability of the straw bale 8, but also enhances the compression resistance and weathering resistance of the straw bale 8, which is beneficial to the long-term storage and transportation of the forage.

[0048] The central roller 521 is rotatably connected to the front shell body 31, and the two movable rollers 522 respectively penetrate through the guide grooves 315 provided on the front shell body 31, and the front shell body 31 is provided with a driving arm 316 which can rotate around the axis of the central roller 521, and the movable roller 522 is rotatably arranged on the driving arm 316. The driving arm 316 can ensure that the relative position between the central roller 521 and the movable roller 522 remains stable, and the driving arm 316 can rotate with the axis of the central roller 521 as the center of the circle to control the position state of the movable conveyor belt 52.

[0049] Reference Figure 6-9 The central roller 521 and the two movable rollers 522 are staggered to form a triangular structure of the conveyor belt 2 523, wherein the side of the conveyor belt 2 523 close to the picking and feeding component 4 is an elevation surface, and there is a large angle between the elevation surface and the conveyor belt 1 512, which can expose more space for forage feeding, and the portion of the conveyor belt 2 523 located between the two movable rollers 522 is a twisting surface, and the rotation of the driving arm 316 will change the position of the twisting surface, and the twisting surface can fit with the surface of the conveyor belt 1 512. When the twisting surface fits with the surface of the conveyor belt 1 512, the grass is crushed and twisted into grass sheets for output, and when the twisting surface is away from the surface of the conveyor belt 1 512, the grass is output in a loose state.

[0050] Reference Figure 6-9The speed change transmission structure includes a transition shaft rotatably arranged on the front housing 31, a shaft of the central roller 521 is fixedly connected to the output end of the motor 2 55 fixedly installed on the front housing 31, and the motor 2 55 is started to drive the central roller 521 to rotate, a sprocket 1 is fixedly installed on the shaft of the central roller 521 and the transition shaft, and the two sprockets 1 are connected by a chain 1 transmission, a transmission gear 1 53 is fixedly installed on the shaft of one of the fixed rollers 511, and a transmission gear 2 54 is fixedly installed on the transition shaft, and the transmission gear 1 53 and the transmission gear 54 are fixedly installed. Gears 2 54 mesh with each other, and the rotation of the central roller 521 drives the transition shaft to rotate through chain 1, and then drives the transmission gear 2 54 to rotate through transmission gear 1 53, and then drives one of the fixed rollers 511 to rotate, so that the effective number of teeth of transmission gear 1 53 is smaller than that of transmission gear 2 54. Therefore, the rotation speed of the central roller 521 is lower than that of the fixed roller 511, so that the conveying speed of conveyor belt 1 512 is greater than that of conveyor belt 2 523. Under the speed difference between conveyor belt 1 512 and conveyor belt 2 523, the forage grass can be twisted.

[0051] Reference Figure 3-4 The hydraulic push-pull structure includes a mounting rod 1 fixedly arranged on the top of the front shell 31, and a hydraulic push rod 3 317 is rotatably arranged on the mounting rod 1. The telescopic end of the hydraulic push rod 317 is rotatably connected to the mounting rod 2 fixedly arranged on the rear cover 32. The hydraulic push rod 317 is retracted and retracted to control the position change of the mounting rod 2 to drive the rear cover 32 to open and close. The axis of the hinge point between the front shell 31 and the rear cover 32 coincides with the support roller 62 located at the top of the rear cover 32. Therefore, the opening and closing of the rear cover 32 will not affect the power output of the power assembly 7.

[0052] The specific working principle of the present invention is as follows:

[0053] When collecting forage, the user drives the tractor head 1 and pulls the baling device 2 along the forage pile through the tractor head 1. At the same time, it is necessary to start motor 1 44, motor 2 55 and motor 3 73, so that the material picking and feeding component 4, the forage twisting component 5 and the baling component 6 are all in operation.

[0054] After the motor 1 44 is started, it drives the two feeding rollers 43 to rotate in opposite directions, and at the same time drives the picking roller 42 to rotate through the chain 2. The rotation of the picking roller 42 drives the picking strip 46 to rotate, hooking the grass pile on the ground and throwing it to one side of the feeding roller 43. The two feeding rollers 43 rotate in opposite directions to bite the grass and transport it to the other side, entering between the movable conveyor belt 52 and the fixed conveyor belt 51. After the motor 2 55 is started, it drives the axis roller 521 to rotate, and the axis roller 521 drives the transition shaft to rotate through the chain 1, and then drives the transmission gear 2 54 to rotate through the transmission gear 1 53, thereby driving one of the fixed rollers 511 to rotate. When the fixed roller 511 rotates, it will drive the conveyor belt 1 512 to move. The rotation of the axis roller 521 and the two movable rollers 522 will drive the conveyor belt 2 523 to move, thereby transporting the grass to the coring area 65.

[0055] The power shaft 71 is driven to rotate by the motor 3 73, and then the expansion shaft 72, the support roller 62 and the coring roller 611 are driven to rotate. In the initial state, the baling belt 64 coincides with the transition notch 67. After the hay enters the coring area 65, as the coring guide roller group 61 rotates, the hay mass is rotated into a core, and the diameter gradually increases to form a hay core 9. As the hay core 9 gradually increases in size, it squeezes the baling belt 64, causing the baling belt 64 to bend toward the baling area 66. The hay core 9 gradually transitions to the baling area 66 in the process of the bale becoming larger. Finally, the finished hay bale 8 is gradually formed under the drive of the baling belt 64. After the hay bale 8 is formed, the baling belt 64 will be supported to the position of the positioning rod 69.

[0056] After the bale 8 is formed, it needs to be wrapped with a net to prevent the bale 8 from loosening. In order to achieve continuous work without stopping, the hydraulic push rod 312 can be extended and retracted during the wrapping process to control the adjusting roller 63 to move in the guide groove 311, so that the adjusting roller 63 drives the rounding belt 64 to isolate the coring area 65 and the rounding area 66 downward. At this time, the bale 8 is wrapped with a net in the rounding area 66, and the grass material subsequently transported in is cored in the coring area 65, so that a new grass core 9 is formed while the bale 8 is wrapped with a net and unloaded. The adjusting roller 63 and the rounding belt 64 are reset after the bale 8 is discharged, and the rotation of the driving arm 316 is synchronized with the position change of the adjusting roller 63. When a new grass core 9 is formed, the movable conveyor is controlled. Belt 52 is separated from the fixed conveyor belt 51. At this time, the grass transported into the coring area 65 is in a loose state, so the grass core 9 will be in a relatively loose coring state, which is helpful to better distribute the grass fibers in the subsequent baling process and avoid the problem of poor air permeability caused by excessive internal compaction. When the grass bale 8 is discharged and the adjusting roller 63 is reset to bundle the newly generated grass core 9, the movable conveyor belt 52 is controlled to fit the fixed conveyor belt 51 to twist the grass into sheets for transportation. At this time, the sheet-like grass is wrapped around the grass core 9 into bundles with higher compactness. The final grass bale 8 has the structural characteristics of "loose inside and tight outside", which not only ensures the compactness and stability of the grass bale 8, but also improves the air permeability and storage performance of the grass bale 8.

Claims

1. A self-propelled forage round baler, comprising a baling device (2) and a tractor head (1) for towing the baling device (2), characterized in that: The baling device (2) comprises a housing (3), a material picking and feeding assembly (4), a grass twisting assembly (5), a baling assembly (6) and a power assembly (7), wherein: The housing (3) comprises a front housing (31), a rear cover (32) and a moving wheel arranged below the front housing (31); the front housing (31) and the rear cover (32) are hinged to each other, and a hydraulic push-pull structure for controlling the opening and closing of the rear cover (32) is arranged on the front housing (31) and the rear cover (32); The picking and feeding component (4) is used to pick up the forage material on the moving path of the baler and convey it to the forage twisting component (5); The forage twisting component (5) comprises a fixed conveyor belt (51) and a movable conveyor belt (52); when the movable conveyor belt (52) is in contact with the fixed conveyor belt (51), the forage is twisted into sheets and conveyed to the rounding component (6); when the movable conveyor belt (52) is separated from the fixed conveyor belt (51), the forage is rounded and conveyed to the rounding component (6); The fixed conveyor belt (51) comprises two fixed rollers (511) rotatably arranged on the front housing (31) and a conveyor belt 1 (512) sleeved between the two fixed rollers (511); the movable conveyor belt (52) comprises an axial roller (521) and two movable rollers (522); a conveyor belt 2 (523) is sleeved between the axial roller (521) and the two movable rollers (522); a variable speed transmission structure is arranged between the axial roller (521) and one of the fixed rollers (511); the axial roller (521) is rotatably connected to the front housing (31); the two movable rollers (522) respectively penetrate guide grooves 3 (315) provided on the front housing (31); and a driving arm (316) rotatable around the axis of the axial roller (521) is arranged on the front housing (31); the movable roller (522) is rotatably arranged on the driving arm (316); The axis roller (521) and the two movable rollers (522) are staggered so that the conveyor belt 2 (523) forms a triangular structure, wherein the side surface of the conveyor belt 2 (523) close to the material picking and feeding assembly (4) is an elevation surface, and the portion of the conveyor belt 2 (523) located between the two movable rollers (522) is a twisted surface, and the twisted surface can be in contact with the surface of the conveyor belt 1 (512); The rounding assembly (6) comprises a core-forming guide roller group (61), a movable adjusting roller (63), a plurality of supporting rollers (62), a rounding belt (64) wound around the adjusting roller (63) and the plurality of supporting rollers (62), and a control structure for controlling the tension of the rounding belt (64). A core-forming area (65) is formed above the core-forming guide roller group (61), a circular rounding area (66) is formed in the area surrounded by the adjusting roller (63) and the plurality of supporting rollers (62), and the adjusting roller (63) and the supporting roller (62) at the bottom are arranged on the core-forming guide roller group (61). 2) between the coring area (65) and the rounding area (66), a transition gap (67) is formed between the coring area (65) and the rounding area (66), and after the grass forms a loose grass core (9) in the coring area (65), the grass enters the rounding area (66) through the transition gap (67) and continuously inputs the sheet-like grass, so that the sheet-like grass is wrapped around the grass core (9) to form a grass bale (8) with a "loose inside and tight outside" structural feature. The regulating roller (63) can drive the rounding belt (64) to block the transition gap (67), and a new grass core (9) is formed while the grass bale (8) is unloaded.

2. The self-propelled forage round bale baler according to claim 1, characterized in that: The core forming guide roller group (61) comprises a plurality of core forming rollers (611) rotatably arranged on the front shell body (31), the outer circumferential surfaces of the plurality of core forming rollers (611) being close to each other, and the arrangement path of the plurality of core forming rollers (611) is in the shape of an arc with a concave surface facing the core forming area (65).

3. The self-propelled forage round bale baler according to claim 1, characterized in that: The front shell (31) is provided with a guide groove (311) which is arranged concentrically with the bundling area (66); the adjusting roller (63) is arranged to pass through the guide groove (311); and a hydraulic push rod (312) is arranged outside the front shell (31); the telescopic end of the hydraulic push rod (312) is rotatably connected to the rotating shaft of the adjusting roller (63), and the other end is rotatably connected to the front shell (31).

4. The self-propelled forage round bale baler according to claim 1, characterized in that: The control structure comprises a plurality of control rollers (68), wherein the control rollers (68) extend through a second guide groove (313) provided on the front shell (31), and a second hydraulic push rod (314) arranged along the second guide groove (313) is fixedly mounted outside the front shell (31), wherein the telescopic end of the second hydraulic push rod (314) is rotationally connected to the control roller (68), and the control roller (68) abuts against the outer side surface of the rounding belt (64).

5. The self-propelled forage round bale baler according to claim 1, characterized in that: A plurality of mutually parallel positioning rods (69) are rotatably disposed in the outer shell (3), and the plurality of positioning rods (69) are distributed along the outer edge contour of the bundling area (66).

6. The self-propelled forage round bale baler according to claim 1, characterized in that: The speed change transmission structure comprises a transition shaft rotatably mounted on the front housing (31); a sprocket wheel 1 is fixedly mounted on the rotating shaft of the axial roller (521) and the transition shaft; the two sprocket wheels 1 are connected to each other via a chain wheel; a transmission gear 1 (53) is fixedly mounted on the rotating shaft of one of the fixed rollers (511); a transmission gear 2 (54) is fixedly mounted on the transition shaft; and the transmission gear 1 (53) and the transmission gear 2 (54) are meshed with each other.

7. The self-propelled forage round bale baler according to claim 6, characterized in that: The effective number of teeth of the transmission gear 1 (53) is smaller than that of the transmission gear 2 (54).

8. The self-propelled forage round baler according to claim 1, characterized in that: The hydraulic push-pull structure comprises a mounting rod 1 fixedly arranged on the top of the front housing (31), a hydraulic push rod 3 (317) being rotatably arranged on the mounting rod 1, a telescopic end of the hydraulic push rod 3 (317) being rotatably connected to a mounting rod 2 fixedly arranged on the rear cover (32), and an axis of a hinge point between the front housing (31) and the rear cover (32) coincides with a support roller (62) located on the top of the rear cover (32).

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