Alfalfa bale busting conveyor

CN224857885UActive Publication Date: 2026-10-16MENGCAO ECOLOGICAL ENVIRONMENT (GRP) CO LTD +1
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Patent Information

Application Number
CN202621285797.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2026-08-19
Publication Date
2026-10-16
Estimated Expiration
2036-08-19

AI Technical Summary

Technical Problem

但人工使用撬具、耙具对草包进行拆解打散时,需要逐层的对草包进行撕扯,耗费时间长且效率低,并且人工完成草包打散作业后,还需借助转运推车将打散的草料转运至下一加工工位(例如粉碎工位、混料工位等),降低整条制粒生产线的连续作业效率

Benefits of technology

一、在本实用新型中,随着旋转辊的旋转,通过梳齿对苜蓿草包撕扯、打散,撕扯过程中,第一液压伸缩器的伸缩端会通过滚动轮向上推动支撑板,此时支撑板会沿着靠近旋转辊的方向发生旋转并呈倾斜状态,而位于支撑板上的苜蓿草包在自身重力下会沿着支撑板的倾斜面滑移,同时,第二液压伸缩器的伸缩端伸出,并通过推板对支撑板上的草料进行定向的辅助推动,持续的为苜蓿草包提供推进力,避免梳齿对草料进行旋转撕扯的过程中,苜蓿草包向后滑移,导致梳齿没有充分的与草料接触,整个撕扯、打散过程无需人工干预,避免工作人员被梳齿打伤。

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Abstract

The utility model belongs to forage conveying technical field especially relates to a kind of alfalfa bale dispersing conveyor, including base, conveying structure, comb tooth and push material structure, and push material structure includes support plate, first hydraulic telescopic ware is fixedly connected on base, and the telescopic end of first hydraulic telescopic ware is set below support plate by rolling wheel, and the telescopic end of second hydraulic telescopic ware is fixedly connected with push plate, and alfalfa bale is dispersed by comb tooth, and the telescopic end of first hydraulic telescopic ware is pushed support plate upwards by rolling wheel, and support plate rotates along the direction close to rotating roller and presents inclined state, and alfalfa bale slides along the inclined surface of support plate, and the telescopic end of second hydraulic telescopic ware is pushed by push plate to forage, continuously provides propelling force for alfalfa bale, avoids alfalfa bale backward sliding in the process that comb tooth is torn to rotate to forage, causes that comb tooth does not have fully contacted with forage.
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Description

Technical Field

[0001] This utility model belongs to the field of forage conveying technology, and in particular relates to an alfalfa bale breaking conveyor. Background Technology

[0002] In a hay pelleting production line, workers typically pre-treat the compacted hay bales or rolls by breaking them up. However, manually breaking up the hay bales using pry bars and rakes requires tearing the bales layer by layer, which is time-consuming and inefficient. Furthermore, after manually breaking up the hay bales, a transfer cart is needed to transport the broken hay to the next processing station (such as the crushing or mixing station), reducing the continuous operating efficiency of the entire pelleting production line. When using disintegration equipment for processing, existing disintegration equipment has two types of feed plates. One type is a fixed feed plate, where the straw bales are placed on a fixed feed plate. During operation, the straw bales need to be pushed manually to make them contact the disintegration teeth. However, this is relatively dangerous, and workers are easily injured by the disintegration teeth. The other type is a rotatable feed plate, where the straw bales are placed on the feed plate and the feed plate is rotated at a certain angle to tilt it. The straw bales will slide down to the disintegration teeth under their own weight. However, during the tearing operation, the feed plate carrying the straw bales needs to be constantly supported by the workers, which is labor-intensive. Utility Model Content

[0003] (a) Technical problems to be solved This utility model provides an alfalfa bale breaking and conveying machine to solve the following problems: 1. Manually dismantling and breaking up straw bales (or straw rolls) is time-consuming and inefficient. 2. When using a disintegration device to break up straw bales (or straw rolls), manually pushing the straw bales to feed them can easily cause safety accidents. In addition, manually lifting the feed plate carrying the straw bales for a long time is a heavy burden.

[0004] (II) Technical Content To achieve the above objectives, this utility model provides the following technical solution: A bale-breaking conveyor for alfalfa includes a base, two side baffles are symmetrically fixed to the top of the base, a conveying structure is installed on one side of the base, a rotating roller is rotatably connected between the two side baffles, the rotating roller is located above the input end of the conveying structure, and comb teeth are fixed to the rotating roller. A pushing structure is rotatably connected between the two side baffles. The pushing structure includes a support plate rotatably connected between the two side baffles. A first hydraulic telescopic device is fixedly connected to the base. The telescopic end of the first hydraulic telescopic device is provided with a rolling wheel. The rolling wheel is located below the support plate and rolls in contact with the support plate. A second hydraulic expansion joint is fixedly connected to the top of the side of the support plate away from the comb teeth, and a push plate is fixedly connected to the telescopic end of the second hydraulic expansion joint.

[0005] Furthermore, the front end of the base is provided with a recessed mounting groove, and the conveying structure includes two belt rollers rotatably connected in the recessed mounting groove, and the two belt rollers are connected by a first conveyor belt. A first rotary motor is fixedly connected to one side of the base, and the output shaft of the first rotary motor is fixedly connected to one of the belt rollers; The rotating roller is located above the first conveyor belt.

[0006] Furthermore, symmetrical side supports are fixed to the base, and a drive spindle is fixed to the axis of the rotating roller by screws. The drive spindle is rotatably connected between the two side supports.

[0007] Furthermore, a side support extends from one end of the drive spindle, and a driven sprocket is fixedly fitted on the extended shaft. A motor bracket is fixedly connected to the base near the driven sprocket, and a second rotary motor is fixedly connected to the motor bracket. A drive sprocket is fixedly fitted on the output shaft of the second rotary motor, and the drive sprocket and the driven sprocket are connected by a transmission chain.

[0008] Furthermore, the number of teeth on the active toothed disc is less than the number of teeth on the driven toothed disc.

[0009] Furthermore, the end of the support plate closest to the rotating roller is rotatably connected between the two side baffles via a rotating shaft; Two first hydraulic expansion joints are symmetrically fixed to the base. The two first hydraulic expansion joints are symmetrically distributed below the support plate. The top of the telescopic end of the first hydraulic expansion joint is fixed with a T-shaped roller base by bolts. Two rolling wheels are symmetrically rotatably connected on the roller base.

[0010] Furthermore, a gap is left between the side wall of the support plate and the side baffle on the same side.

[0011] Furthermore, a gap is left between the bottom of the push plate and the top of the support plate.

[0012] Furthermore, the output shaft of the first rotary motor is fixedly connected to one end of the belt roller near the input end of the first conveyor belt; The two ends of the belt roller near the output end of the first conveyor belt extend out of the base, and the two ends are respectively fixedly fitted with the first synchronous belt pulley; A brush roller is rotatably connected to one end of the base near the output end of the first conveyor belt. The brush roller is located below the first conveyor belt and has bristles that contact the bottom of the first conveyor belt. The brush roller extends from the base at both ends, and a second synchronous pulley is fixedly fitted at each end. The first and second synchronous pulleys on the same side are connected by a second transmission belt.

[0013] (III) Beneficial Effects Compared with the prior art, the beneficial effects of this utility model are as follows: I. In this utility model, as the rotating roller rotates, the comb teeth tear and break up the alfalfa bales. During the tearing process, the telescopic end of the first hydraulic telescopic device pushes the support plate upward through the rolling wheel. At this time, the support plate rotates and tilts along the direction close to the rotating roller. The alfalfa bales on the support plate slide along the tilted surface of the support plate under their own weight. At the same time, the telescopic end of the second hydraulic telescopic device extends and pushes the hay on the support plate in a directional manner through the push plate, continuously providing propulsion force to the alfalfa bales. This prevents the alfalfa bales from sliding backward during the rotation and tearing process of the comb teeth, which would result in insufficient contact between the comb teeth and the hay. The entire tearing and breaking process does not require manual intervention, thus avoiding injury to workers from the comb teeth.

[0014] Second, in this utility model, the crushed grass will fall onto the first conveyor belt, and the grass will be transported to the next process (including but not limited to crushing and mixing processes) through the first conveyor belt, without the need for manual transfer.

[0015] Third, in this utility model, the rotating roller and the drive spindle are fixedly connected by screws, so that the staff can install rotating rollers with different types of comb teeth in the future.

[0016] Fourth, in this utility model, the number of teeth of the active toothed disc is less than the number of teeth of the driven toothed disc, thereby increasing the torque of the rotating roller while reducing the rotation speed of the rotating roller, and preventing the rotating roller from rotating too fast and throwing the torn grass out.

[0017] V. In this utility model, during lifting, the telescopic end of the first hydraulic telescopic device extends upward and pushes the support plate upward through the rolling wheel. At this time, the support plate will rotate around the axis of the rotating shaft and be in an inclined state. The rolling wheel can convert the sliding friction between the first hydraulic telescopic device and the support plate into rolling friction, thereby reducing the wear between the support plate and the first hydraulic telescopic device.

[0018] VI. In this utility model, when the belt roller rotates clockwise, it will drive the first synchronous belt pulley to rotate in the same direction. Under the action of the second conveyor belt, it will drive the second synchronous belt pulley to rotate in the same direction. The second synchronous belt pulley will drive the brush roller to rotate in the same direction. Thus, while the first conveyor belt is conveying grass, the bristles on the brush roller will brush the area below the first conveyor belt to remove the grass adhering to the first conveyor belt. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a structural schematic diagram of the present invention from another perspective; Figure 4 This is a schematic diagram of the structure of the first hydraulic expansion joint in this utility model when it lifts the support plate using rolling wheels; Figure 5 for Figure 4 A magnified view of a portion of point B in the middle; Figure 6 This is an exploded view of the base, belt roller, and first conveyor belt in this utility model; Figure 7 This is a schematic diagram of the rotating roller and drive spindle in this utility model.

[0020] In the diagram: 11. Base; 1101. Recessed mounting groove; 12. Side support frame; 13. Motor bracket; 21. Belt roller; 22. First conveyor belt; 23. First rotary motor; 31. Rotary roller; 311. Comb teeth; 32. Drive spindle; 33. Driven toothed sprocket; 34. Second rotary motor; 35. Driven toothed sprocket; 36. Transmission chain; 41. Support plate; 42. First hydraulic expansion joint; 43. Roller base; 44. Rolling wheel; 45. Second hydraulic expansion joint; 46. Push plate; 51. Side baffle; 61. First synchronous pulley; 62. Second synchronous pulley; 63. Second conveyor belt; 64. Brush roller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1 like Figures 1-7As shown, an alfalfa bale breaking conveyor includes a base 11. Two side baffles 51 are symmetrically fixed to the top of the base 11. A conveying structure is installed on one side of the base 11. A rotating roller 31 is rotatably connected between the two side baffles 51. The rotating roller 31 is located above the input end of the conveying structure. Comb teeth 311 are fixed to the rotating roller 31. During operation, as the rotating roller 31 rotates, the comb teeth 311 tear and break up the alfalfa bales. The broken-up bales fall onto the conveying structure, which then conveys the torn bales to the next process (including but not limited to crushing and mixing processes). A pusher structure is rotatably connected between the two side baffles 51, such as Figures 3-5 As shown, the pushing structure includes a support plate 41 rotatably connected between two side baffles 51. Alfalfa bales are placed on the support plate 41. The side baffles 51 on both sides of the support plate 41 can limit the position of the alfalfa bales. A first hydraulic telescopic device 42 is fixedly connected to the base 11. The telescopic end of the first hydraulic telescopic device 42 is provided with a rolling wheel 44. The rolling wheel 44 is located below the support plate 41 and rolls in contact with the support plate 41. During the tearing process, the telescopic end of the first hydraulic telescopic device 42 pushes the support plate 41 upward through the rolling wheel 44. At this time, the support plate 41 will rotate and tilt along the direction close to the rotating roller 31. The alfalfa bales on the support plate 41 will roll along the support plate 41 under their own weight. The inclined surface of the support plate 41 slides; a second hydraulic telescoping device 45 is fixedly connected to the top of the side of the support plate 41 away from the comb teeth 311. A push plate 46 is fixedly connected to the telescoping end of the second hydraulic telescoping device 45. During operation, the telescoping end of the second hydraulic telescoping device 45 extends and provides directional auxiliary pushing of the hay on the support plate 41 through the push plate 46, continuously providing propulsion force for the alfalfa bales. This prevents the alfalfa bales from sliding backward during the rotation and tearing of the hay by the comb teeth 311, which would cause the comb teeth 311 to not make sufficient contact with the hay. The alfalfa bales located on the support plate 41 will slide along the inclined surface of the support plate 41 under their own weight, thereby reducing the load required for the second hydraulic telescoping device 45 to push the alfalfa bales.

[0023] Furthermore, in combination Figure 1 and Figure 6 The base 11 has a recessed mounting groove 1101 at its front end for mounting a conveying structure. The conveying structure includes two belt rollers 21 rotatably connected in the recessed mounting groove 1101. The two belt rollers 21 are connected by a first conveying belt 22. A first rotary motor 23 is fixedly connected to one side of the base 11, and the output shaft of the first rotary motor 23 is fixedly connected to one of the belt rollers 21. The rotating roller 31 is located above the first conveyor belt 22. The straw torn off by the comb teeth 311 will fall onto the first conveyor belt 22. During operation, the output shaft of the first rotary motor 23 drives the corresponding belt roller 21 to rotate clockwise, thereby providing transmission power for the first conveyor belt 22.

[0024] Furthermore, in combination Figure 1 and Figure 7 Side support frames 12 are symmetrically fixed on the base 11. A drive spindle 32 is fixed to the axis of the rotating roller 31 by screws. The rotating roller 31 and the drive spindle 32 are fixed by screws so that the staff can install rotating rollers 31 with different types of comb teeth 311 later. The drive spindle 32 is rotatably connected between the two side support frames 12.

[0025] Furthermore, such as Figure 1 As shown, a side support 12 extends from one end of the drive spindle 32, and a driven toothed disc 33 is fixedly sleeved on the extended shaft. A motor bracket 13 is fixedly connected to the base 11 near the driven toothed disc 33. A second rotary motor 34 is fixedly connected to the motor bracket 13. A drive toothed disc 35 is fixedly sleeved on the output shaft of the second rotary motor 34. The drive toothed disc 35 and the driven toothed disc 33 are connected by a transmission chain 36. During operation, the output shaft of the second rotary motor 34 drives the drive toothed disc 35 to rotate counterclockwise. Under the action of the transmission chain 36, the driven toothed disc 33 will also rotate in the same direction, simultaneously driving the drive spindle 32 and the rotary roller 31 to rotate in the same direction, providing power for the tearing work of the comb teeth 311. Furthermore, the number of teeth on the active toothed disc 35 is less than the number of teeth on the driven toothed disc 33, thereby increasing the torque of the rotating roller 31 while reducing the rotation speed of the rotating roller 31, preventing the rotating roller 31 from rotating too fast and throwing the torn hay out.

[0026] Furthermore, the end of the support plate 41 near the rotating roller 31 is rotatably connected between the two side baffles 51 via a rotating shaft; Two first hydraulic expansion joints 42 are symmetrically fixed to the base 11. The two first hydraulic expansion joints 42 are symmetrically distributed below the support plate 41, as shown below. Figure 5 As shown, a T-shaped roller base 43 is fixed to the top of the telescopic end of the first hydraulic expansion joint 42 by bolts. Two rollers 44 are symmetrically rotatably connected to the roller base 43. The roller base 43 is designed to facilitate the placement of the rollers 44 on the telescopic end of the first hydraulic expansion joint 42. It also facilitates disassembly by workers during maintenance and replacement. During lifting, the telescopic end of the first hydraulic telescopic device 42 extends upward and pushes the support plate 41 upward through the rolling wheel 44. At this time, the support plate 41 will rotate around the axis of the rotating shaft and be in an inclined state. The rolling wheel 44 can convert the sliding friction between the first hydraulic telescopic device 42 and the support plate 41 into rolling friction, thereby reducing the wear between the support plate 41 and the first hydraulic telescopic device 42.

[0027] During equipment debugging, staff can adjust the tilt angle of the support plate 41 by controlling the maximum extension height of the extension end of the first hydraulic expansion joint 42.

[0028] Furthermore, a gap is left between the side wall of the support plate 41 and the side baffle 51 on the same side to prevent wear between the support plate 41 and the side baffle 51 during long-term use and lifting. During use, a small amount of straw will fall onto the base 11 along the gap. The staff can clean up this straw regularly. When cleaning, the straw on the base 11 can be cleaned by lifting the support plate 41 with the first hydraulic telescopic device 42 and the rolling wheel 44.

[0029] Furthermore, a gap is left between the bottom of the push plate 46 and the top of the support plate 41 to prevent wear between the push plate 46 and the support plate 41 during long-term use and movement.

[0030] Furthermore, such as Figure 1 , Figure 2 and Figure 6 As shown, the output shaft of the first rotary motor 23 is fixedly connected to one end of the belt roller 21 near the input end of the first conveyor belt 22; The two ends of the belt roller 21 near the output end of the first conveyor belt 22 extend out of the base 11, and the two ends are respectively fixedly fitted with the first synchronous belt pulley 61; A brush roller 64 is rotatably connected to one end of the base 11 near the output end of the first conveyor belt 22. The brush roller 64 is located below the first conveyor belt 22 and has bristles that contact the bottom of the first conveyor belt 22. The brush roller 64 extends from the base 11 at both ends, and the second synchronous pulley 62 is fixedly sleeved at both ends. The first synchronous pulley 61 and the second synchronous pulley 62 on the same side are connected by the second transmission belt 63.

[0031] When the output shaft of the first rotary motor 23 drives the belt roller 21 near the input end of the first conveyor belt 22 to rotate clockwise, the belt roller 21 near the output end of the first conveyor belt 22 also rotates clockwise under the action of the first conveyor belt 22, and at the same time drives the first synchronous pulley 61 to rotate in the same direction. Under the action of the second conveyor belt 63, the second synchronous pulley 62 rotates in the same direction. The second synchronous pulley 62 drives the brush roller 64 to rotate in the same direction. Thus, while the first conveyor belt 22 is conveying grass, the bristles on the brush roller 64 brush the area below the first conveyor belt 22 to remove the grass attached to the first conveyor belt 22.

[0032] In summary, the workflow of this utility model is as follows: During feeding, alfalfa bales are placed between side baffles 51. Then, the telescopic end of the first hydraulic telescopic device 42 slowly extends upward and pushes the support plate 41 upward through the rolling wheel 44. At this time, the support plate 41 will rotate around the axis of rotation and be in an inclined state. The hay on the support plate 41 slides along the inclined surface of the support plate 41. At the same time, the telescopic end of the second hydraulic telescopic device 45 extends and pushes the hay on the support plate 41 in a directional manner through the push plate 46, continuously providing propulsion force for the alfalfa bales, so that the alfalfa bales come into contact with the comb teeth 311. The output shaft of the second rotary motor 34 drives the active toothed disc 35 to rotate counterclockwise. Under the action of the transmission chain 36, the driven toothed disc 33 will also rotate in the same direction, which in turn drives the drive spindle 32 and the rotating roller 31 to rotate in the same direction. When the comb teeth 311 on the rotating roller 31 rotate counterclockwise, they will tear the alfalfa bales. The torn hay falls onto the first conveyor belt 22, which then transports the torn hay to the next process for further processing. At the same time, the belt roller 21 near the output end of the first conveyor belt 22 rotates clockwise and drives the first synchronous belt pulley 61 to rotate in the same direction. Under the action of the second conveyor belt 63, it drives the second synchronous belt pulley 62 to rotate in the same direction. The second synchronous belt pulley 62 drives the brush roller 64 to rotate in the same direction. Thus, while the first conveyor belt 22 is conveying grass, the bristles on the brush roller 64 brush the area below the first conveyor belt 22 and remove the grass attached to the first conveyor belt 22.

[0033] However, as is well known to those skilled in the art, the working principles and wiring methods of the first rotary motor 23, the first hydraulic expansion joint 42, the second hydraulic expansion joint 45, and the second rotary motor 34 are commonplace and belong to conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A conveyor for breaking up alfalfa bales, characterized in that: Includes a base (11), two side baffles (51) are symmetrically fixed to the top of the base (11), a conveying structure is installed on one side of the base (11), a rotating roller (31) is rotatably connected between the two side baffles (51), the rotating roller (31) is located above the input end of the conveying structure, and a comb tooth (311) is fixed on the rotating roller (31). A pushing structure is rotatably connected between the two side baffles (51). The pushing structure includes a support plate (41) rotatably connected between the two side baffles (51). A first hydraulic telescopic device (42) is fixed on the base (11). A rolling wheel (44) is provided at the telescopic end of the first hydraulic telescopic device (42). The rolling wheel (44) is located below the support plate (41) and the rolling wheel (44) is in rolling contact with the support plate (41). A second hydraulic telescoping device (45) is fixedly connected to the top of the side of the support plate (41) away from the comb teeth (311), and a push plate (46) is fixedly connected to the telescoping end of the second hydraulic telescoping device (45).

2. The alfalfa bale unpacking conveyor according to claim 1, characterized in that: The base (11) has a recessed mounting groove (1101) at its front end. The transmission structure includes two belt rollers (21) rotatably connected in the recessed mounting groove (1101). The two belt rollers (21) are connected by a first transmission belt (22). A first rotary motor (23) is fixedly connected to one side of the base (11), and the output shaft of the first rotary motor (23) is fixedly connected to one of the belt rollers (21); The rotating roller (31) is located above the first conveyor belt (22).

3. The alfalfa bale unpacking conveyor according to claim 1, characterized in that: The base (11) is symmetrically fixed with side support frames (12), and the axis of the rotating roller (31) is fixed with a drive spindle (32) by screws. The drive spindle (32) is rotatably connected between the two side support frames (12).

4. The alfalfa bale unloading conveyor according to claim 3, characterized in that: One end of the drive spindle (32) extends out a side support (12), and a driven sprocket (33) is fixedly sleeved on the extended shaft. A motor bracket (13) is fixedly connected to the side of the base (11) near the driven sprocket (33). A second rotary motor (34) is fixedly connected to the motor bracket (13). An active sprocket (35) is fixedly sleeved on the output shaft of the second rotary motor (34). The active sprocket (35) and the driven sprocket (33) are connected by a transmission chain (36).

5. The alfalfa bale unpacking conveyor according to claim 4, characterized in that: The number of teeth of the active toothed disc (35) is less than the number of teeth of the driven toothed disc (33).

6. The alfalfa bale unpacking conveyor according to claim 1, characterized in that: The end of the support plate (41) near the rotating roller (31) is rotatably connected between the two side baffles (51) via a rotating shaft; Two first hydraulic expansion joints (42) are symmetrically fixed on the base (11). The two first hydraulic expansion joints (42) are symmetrically distributed below the support plate (41). The top of the expansion end of the first hydraulic expansion joint (42) is fixed with a T-shaped roller base (43) by bolts. Two rollers (44) are symmetrically rotatably connected on the roller base (43).

7. The alfalfa bale unpacking conveyor according to claim 6, characterized in that: A gap is left between the side wall of the support plate (41) and the side baffle (51) on the same side.

8. The alfalfa bale unpacking conveyor according to claim 6, characterized in that: There is a gap between the bottom of the push plate (46) and the top of the support plate (41).

9. The alfalfa bale unpacking conveyor according to claim 2, characterized in that: The output shaft of the first rotary motor (23) is fixedly connected to one end of the belt roller (21) near the input end of the first conveyor belt (22); The two ends of the belt roller (21) near the output end of the first conveyor belt (22) extend out of the base (11), and the two ends are respectively fixedly fitted with the first synchronous belt pulley (61). A brush roller (64) is rotatably connected to one end of the base (11) near the output end of the first conveyor belt (22). The brush roller (64) is located below the first conveyor belt (22), and brush bristles are provided on the brush roller (64). The brush bristles are in contact with the bottom of the first conveyor belt (22). The brush roller (64) extends from the base (11) at both ends, and the second synchronous pulley (62) is fixedly sleeved at both ends. The first synchronous pulley (61) and the second synchronous pulley (62) on the same side are connected by a second transmission belt (63).