Bale picking equipment with automatic discharging function

Abstract

The invention discloses bale picking equipment with an automatic discharging function, and relates to the technical field of agricultural machinery, the bale picking equipment comprises a loading plate, the loading plate comprises a plurality of partition plates slidably connected in a car hopper, supporting plates fixedly connected to the two ends of each partition plate, and two pairs of jacking oil cylinders slidably connected to the front end and the rear end of the car hopper; the jacking blocks are fixedly mounted at the tops of the jacking oil cylinders, and the lateral pushing oil cylinders are used for transversely moving the jacking oil cylinders; the picking ramp comprises a first conveying frame and a first main shaft rotationally connected to the rear end of the first conveying frame. Through the loading mode that the two sets of jacking oil cylinders alternately jack the partition plates, the interval between the partition plates is not fixed any more, the effect of improving the utilization rate of the internal space of the car hopper is achieved, and the problems that in the prior art, when a side pushing assembly works, a picking ramp outlet is blocked, consequently, a bale conveying channel is blocked, picking action is not coherent, and picking efficiency is high are solved through an anti-blocking assembly. And bale breaking due to the fact that the bottoms of the bales are damaged by chains is avoided.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and more specifically, to a bale picking device with automatic unloading function. Background Technology

[0002] Mechanized agriculture is a common way to increase agricultural income in straw recycling. Typically, balers are used in the fields to bale straw into square or round shapes for easier collection and transportation. While square bale collection machinery is widely used, it still has the following shortcomings: 1. After the partitions for loading bales in the truck bed are lifted, the spacing between the upper and lower partitions is fixed (specifically, several partitions are fixed to a steel wire rope, and the lifting steel wire rope lifts the partitions one by one). It is impossible to quickly adjust the spacing according to the thickness of the bales, resulting in low utilization of the internal space of the truck bed when faced with bales of different volumes, and low efficiency of deployment. Even if it is pre-adjusted, it is still time-consuming and labor-intensive. 2. After multiple bales of straw are collected in the feeding channel, they are pushed into the truck bed in a row by the side pusher mechanism. At this time, the side pusher mechanism blocks the exit of the picking ramp. If there are bales of straw being fed on the ramp at this time, there are two ways to deal with the blockage: Firstly, when the ramp conveyor chain stops conveying, the bales remain inside the ramp, allowing sufficient time for the side-push mechanism to reset. However, if there is another bale at the ramp entrance at this time, in order to prevent the bale from being lost in the field, the tractor will inevitably need to stop to wait for the reset, resulting in discontinuous picking actions and low work efficiency. Secondly, the conveyor chain on the ramp does not stop, so all the hay bales encountered in the field can be picked up and put into the ramp. However, when picking up the second hay bale, the chain must continue to rotate. As a result, the bottom of the first hay bale blocked by the side pushing mechanism above the ramp will be continuously "sawed" by the protruding links of the chain, which can easily damage the binding film or binding rope and cause the hay bale to fall apart.

[0003] To address the aforementioned issues, a bale picking device with automatic unloading function is proposed. Summary of the Invention

[0004] To solve the above-mentioned technical problems, a bale picking device with automatic unloading function is provided. This technical solution solves the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention can be implemented using the following technical solutions: This invention provides a bale picking device with automatic unloading function, comprising: The cargo platform includes multiple partitions slidably connected inside the cargo bed, support plates fixedly connected to both ends of each partition, two pairs of lifting cylinders slidably connected to the front and rear ends of the cargo bed, lifting blocks fixedly installed on the top of each lifting cylinder, and side-push cylinders for laterally moving the lifting cylinders. The pickup ramp includes a conveyor frame and a main shaft rotatably connected to the rear end of the conveyor frame. The feeding roller conveyor is fixedly connected to one side of the truck bed, and the main shaft is rotatably connected to the front end of the feeding roller conveyor. A side-push assembly, comprising a horizontal push rod disposed above the feeding roller conveyor; and, The anti-blocking component includes a swing frame rotatably connected to the top of the front end of the feeding roller conveyor, a limit switch two fixedly installed on the top of the vertical shaft of the swing frame, springs at both ends fixedly connected to the horizontal arm of the swing frame and the edge of the feeding roller conveyor respectively, which can push the limit switch two to deflect in the direction facing the conveyor frame one when the horizontal push rod moves towards the hopper, a lifting frame rotatably connected to the main shaft one, and a cone pin fixedly connected to the top of the lifting frame. When the limit switch two is triggered by the impact of the bale, the lifting frame will deflect upward and lift the bale.

[0006] Furthermore, the telescopic ends of the four side-push cylinders are fixedly connected to the sides of the corresponding lifting cylinders, and the cylinder bodies of the four side-push cylinders are fixedly connected to the four corners of the corresponding truck bed.

[0007] Furthermore, the picking ramp also includes a hydraulic cylinder 1 that is rotatably connected at both ends to the bottom of the conveyor frame 1 and the bottom of the feeding roller conveyor, a conveyor chain 1 located in the middle of the conveyor frame 1, and two conveyor sprockets 1 meshing with the two ends inside the conveyor chain 1. One of the conveyor sprockets 1 is fixedly installed in the middle of the main shaft 1, and the other conveyor sprocket 1 is rotatably connected to the end of the conveyor frame 1 away from the main shaft 1. The pickup ramp also includes a hydraulic motor that is fixedly connected to one end of the main shaft. The hydraulic motor is fixedly installed at a corresponding corner of the truck bed.

[0008] Furthermore, multiple rollers are sequentially connected and rotated along the front and rear direction of the hopper inside the feeding roller conveyor. The pickup ramp also includes a drive chain and multiple drive sprockets that are sequentially arranged and meshed on the drive chain along the front and rear direction of the truck bed. The drive sprocket at the front end is fixedly installed at the end of the main shaft away from the hydraulic motor. The remaining drive sprockets are sequentially fixedly installed at the axis of several rollers near the main shaft.

[0009] Furthermore, the side push assembly also includes a pair of linear reciprocating slide rails arranged vertically in the front and rear directions of the bucket, and a vertical rod fixedly connected to the top of the slider of each linear reciprocating slide rail. The two linear reciprocating slide rails are respectively installed on the front and rear sides inside the feeding roller conveyor and extend into the inside of the bucket. The tops of the two vertical rods are respectively fixedly connected to the bottom sides of the horizontal push rod. The side push assembly also includes a limit switch 1 fixedly installed at the top of the rear end of the feeding roller conveyor. When the limit switch 1 is triggered by the impact of the hay bale, the horizontal push rod will perform a side push operation.

[0010] Furthermore, the anti-blocking component also includes a hydraulic cylinder three, whose two ends are respectively rotatably connected to the bottom of the lifting frame and the bottom of the conveyor frame.

[0011] Furthermore, it also includes a discharge roller conveyor for temporarily storing hay bales to be unloaded, which is fixedly connected to one side of the truck bed, and multiple rollers are sequentially connected and rotated along the front and rear direction of the truck bed inside the discharge roller conveyor.

[0012] Furthermore, it also includes an unloading ramp for unloading the bales to be unloaded, which includes a second conveyor frame, a second main shaft rotatably connected to the front end of the second conveyor frame, a second hydraulic cylinder rotatably connected at both ends to the bottom of the second conveyor frame and the bottom of the unloading roller conveyor, a second conveyor chain located in the middle of the second conveyor frame, and two second conveyor sprockets meshing with the two ends inside the second conveyor chain, one of the second conveyor sprockets being fixedly installed in the middle of the second main shaft, and the other second conveyor sprocket being rotatably connected to the end of the second conveyor frame away from the second main shaft; The pickup ramp also includes a hydraulic motor 2 that is fixedly connected to the two ends of the main shaft 2. The hydraulic motor 2 is fixedly installed at a corresponding corner of the truck bed.

[0013] Furthermore, the pickup ramp also includes a second drive chain and multiple second drive sprockets arranged sequentially along the front and rear direction of the truck bed and meshing with each other inside the second drive chain. The second drive sprocket at the rear end is fixedly installed at the end of the main shaft away from the hydraulic motor, and the remaining several second drive sprockets are fixedly installed at the axis of each roller.

[0014] As described above, the features and advantages of the bale picking device with automatic unloading function in this invention are: The partitions filled with hay bales are alternately lifted by two sets of lifting cylinders until all the upper partitions and hay bales are placed on the hay bales of the bottom partition. This method of loading hay bales ensures that the upper and lower partitions are loaded tightly enough, leaving no gaps. The spacing between the partitions is no longer fixed, but adapts to the thickness of the hay bales. This avoids the problem in existing technologies where multiple partitions in the truck bed are connected and fixed by steel wire ropes, resulting in fixed spacing after the partitions are lifted, which is not conducive to adapting to hay bales of different volumes. This method improves the utilization rate of the internal space of the truck bed.

[0015] When the side push assembly is working, the horizontal push rod deflects the second push limit switch. When another bale is picked up and hits the second limit switch, the lifting frame deflects upward and lifts the bale from the bottom, disengaging it from the first conveyor chain. The anti-blocking assembly prevents the "sawing" action of the first conveyor chain on the bottom of the bale, avoiding the blockage of the picking ramp exit caused by the side push assembly in the prior art, which leads to blockage of the bale conveying channel, discontinuous picking action, and the situation where the bottom of the bale is damaged by the chain and the bale scatters. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the assembly of the carrier plate shown in this invention; Figure 3 for Figure 2 Another perspective view of the middle section structure; Figure 4 This is a schematic diagram of the assembly of the pickup ramp, the loading roller conveyor, and the unloading ramp shown in this invention. Figure 5 This is a schematic diagram of the assembly of the conveyor frame and the feeding roller conveyor shown in this invention; Figure 6 for Figure 5 Another perspective diagram of the structure; Figure 7 This is a schematic diagram of the assembly of the main shaft, transmission sprocket, and transmission chain shown in the present invention. Figure 8 This is a schematic diagram of the cooperation between the partition and the linear reciprocating slide rail shown in this invention; Figure 9 This is a schematic diagram of the anti-clogging component structure shown in the present invention; Figure 10 This is a schematic diagram of the lifting frame assembly shown in the present invention; Figure 11 for Figure 10 Another perspective diagram of the structure; Figure 12 This is a schematic diagram of the assembly of the unloading roller conveyor and the unloading ramp shown in this invention; Figure 13 for Figure 12 Another perspective diagram of the structure; Figure 14 This is a schematic diagram of the assembly of the second main shaft, the second transmission sprocket, and the second transmission chain shown in this invention.

[0017] The reference numerals in the accompanying drawings of this invention are as follows: Cargo platform: 11. Partition; 12. Support plate; 13. Lifting cylinder; 14. Lifting block; 15. Side push cylinder; Pickup ramp: 21. Main shaft 1; 22. Conveyor frame 1; 23. Hydraulic cylinder 1; 24. Conveyor sprocket 1; 25. Conveyor chain 1; 26. Hydraulic motor 1; 27. Drive sprocket 1; 28. Drive chain 1; 31. Feeding roller conveyor; 32. Roller 1; 41. Unloading roller conveyor; 42. Roller II; Unloading ramp: 51. Main shaft 2; 52. Conveyor frame 2; 53. Hydraulic cylinder 2; 54. Conveyor sprocket 2; 55. Conveyor chain 2; 56. Hydraulic motor 2; 57. Drive sprocket 2; 58. Drive chain 2; Side push assembly: 61. Linear reciprocating motion slide rail; 62. Vertical rod; 63. Horizontal push rod; 64. Limit switch one; Anti-blocking components: 71. Swing frame; 72. Limit switch II; 73. Spring; 74. Lifting frame; 75. Cone spike; 76. Hydraulic cylinder III. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] See Figures 1-14 As shown in the figure, an embodiment of the present invention is provided, and a bale picking device with automatic unloading function will be described in detail below: A bale picking device with automatic unloading function, see reference. Figures 1-3 As shown, the vehicle includes a cargo platform, which includes multiple partitions 11 slidably connected inside the cargo bed, support plates 12 fixedly connected to both ends of each partition 11, two pairs of lifting cylinders 13 slidably connected to the front and rear ends of the cargo bed, lifting blocks 14 fixedly installed on the top of each lifting cylinder 13, and side-push cylinders 15 for laterally moving the lifting cylinders 13. Furthermore, the telescopic ends of the four side-push cylinders 15 are fixedly connected to the sides of the corresponding lifting cylinders 13, and the cylinder bodies of the four side-push cylinders 15 are fixedly connected to the four corners of the corresponding cargo bed.

[0020] It should be noted that in this embodiment, when the partitions 11 are stacked, there should be a certain natural gap between adjacent partitions 11. More specifically, there should be a certain gap between the support plates 12 located between adjacent upper and lower partitions 11 to accommodate the lifting blocks 14. When loading bales, loading should start from the top partition 11. First, one lifting cylinder 13 (temporarily designated as the first lifting cylinder 13) is selected from each end of the truck bed. After being pushed and pulled laterally by the corresponding two side-push cylinders 15 (temporarily designated as the first side-push cylinders 15), the tops of the two first lifting cylinders 13 are lifted. Lifting block 14 abuts against the bottom of the support plates 12 at both ends of the uppermost partition 11. Then, after being loaded with bales, the two first lifting cylinders 13 extend simultaneously, lifting the partition 11 along with the bales upwards in the truck bed. Subsequently, the original second partition 11, now the uppermost partition 11, is held against the support plates 12 by the remaining two lifting cylinders 13 (temporarily designated as the second lifting cylinders 13) in the same manner. After being loaded with bales, the two second lifting cylinders 13 extend simultaneously, lifting the partition 11 along with the bales upwards in the truck bed until the top of the bales on the later-lifted partition 11 abuts against the partition that was lifted earlier. At the bottom of 11, after the two first lifting cylinders 13 are removed, the upper partition 11, along with the hay bales, will sit on top of the hay bales on the lower partition 11. At this point, the support for the two upper partitions 11 and the two layers of hay bales will be entirely provided by the second lifting cylinder 13. The removed first lifting cylinder 13 will continue to repeat the above steps, lifting the partitions 11 loaded with hay bales one by one until all the upper partitions 11 and hay bales are sitting on the hay bales of the bottom partition 11. Through the above loading method of hay bales, the loading between the upper and lower parts is sufficiently tight, leaving no gaps, thus improving the efficiency of the vehicle. The internal space utilization of the bucket avoids the situation in the prior art where fixed intervals lead to wasted space when dealing with small bales of grass, and insufficient intervals when dealing with large bales of grass. The reverse action first lowers the bottom partition 11 and the bales above it, so that the unloading operation can start from the bottom partition 11. In this embodiment, the function of the side push cylinder 15 is to enable the lifting block 14 at the top of the lifting cylinder 13 to detach from or enter the bottom of the support plate 12 when the lifting cylinder 13 is pushed and pulled laterally, so as to avoid the support plate 12 from blocking or interfering with the lifting block 14 when the lifting cylinder 13 is raised or lowered.

[0021] See Figures 4-7As shown, the bale picking device with automatic unloading function also includes a picking ramp, which includes a conveyor frame 22, a main shaft 21 rotatably connected to the rear end of the conveyor frame 22 (for clarity of the structural details, the front and rear ends of this solution correspond to the front and rear ends of the truck bed), a conveyor chain 25 located in the middle of the conveyor frame 22, and two conveyor sprockets 24 meshing with the two ends inside the conveyor chain 25. One conveyor sprocket 24 is fixedly installed in the middle of the main shaft 21, and the other conveyor sprocket 24 is rotatably connected to the end of the conveyor frame 22 away from the main shaft 21. The picking ramp also includes a hydraulic motor 26 fixedly connected to one end of the main shaft 21, and the hydraulic motor 26 is fixedly installed at a corresponding corner of the truck bed.

[0022] It should be noted that during the picking operation, the front end of the conveyor frame 22 (analogous to the support frame of a conveyor belt) tilts downwards until it is almost in contact with the ground. The hydraulic motor 26 drives the main shaft 21 to rotate, and the main shaft 21 drives the conveyor sprocket 24 in the middle to rotate. Then, the conveyor chain 25 starts to rotate under the support of another conveyor sprocket 24. When the rotating conveyor chain 25 contacts the bale on the ground, due to the interaction force between the links of the raised conveyor chain 25 and the bale, the bale will be transferred to the conveyor frame 22. Then, relying on the interaction force between the links and the bottom of the bale, the bale can be lifted backward and upward along the conveyor frame 22 to achieve the bale picking effect. Of course, in other implementations, depending on the lifting effect, multiple conveyor chains 25 can be arranged side by side to increase the interaction force with the bale.

[0023] See Figures 4-8 As shown, the bale picking device with automatic unloading function also includes a feeding roller conveyor 31, which is fixedly connected to one side of the truck bed. Multiple rollers 32 are rotatably connected in sequence along the front and rear direction of the truck bed inside the feeding roller conveyor 31, and the main shaft 21 is rotatably connected to the front end of the feeding roller conveyor 31.

[0024] The pickup ramp also includes a drive chain 28 and multiple drive sprockets 27 arranged sequentially along the front and rear direction of the truck bed and meshing with each other on the drive chain 28. The drive sprocket 27 at the foremost end is fixedly installed at the end of the main shaft 21 away from the hydraulic motor 26. The remaining drive sprockets 27 are sequentially fixedly installed at the shaft center of several rollers 32 near the main shaft 21. The hydraulic cylinders 23 are rotatably connected at both ends to the bottom of the conveyor frame 22 and the bottom of the loading roller conveyor 31, respectively. The hydraulic cylinders 23 are used to deflect the conveyor frame 22.

[0025] It should be noted that the feeding roller conveyor 31 is used to temporarily store the picked-up bales. Specifically, the picked-up bales will fall onto the feeding roller conveyor 31 in sequence. When the hydraulic motor 26 drives the main shaft 21 to rotate, the main shaft 21 will also drive the transmission sprocket 27 installed at one end to rotate, which in turn drives the transmission chain 28 outside the transmission sprocket 27 to rotate. The transmission chain 28 will then drive the remaining transmission sprockets 27 to rotate. Then, the transmission sprockets 27 will drive the corresponding rollers 32 close to the main shaft 21 to rotate. When the picked-up bales fall into the feeding roller conveyor 31, they will fall directly onto these rollers 32 close to the main shaft 21. Then, relying on the force of the rotating rollers 32 and the bottom of the bales, the bales will be pushed to the rear end of the feeding roller conveyor 31 in sequence, so that the bales can fill the feeding roller conveyor 31 by themselves.

[0026] See Figure 4 and Figure 8 As shown, the bale picking device with automatic unloading function also includes a side push assembly, which includes a horizontal push rod 63 located above the feeding roller conveyor 31. The side push assembly also includes a pair of linear reciprocating motion slide rails 61 arranged vertically in the front and rear direction of the hopper, and upright rods 62 fixedly connected to the top of the slider of each linear reciprocating motion slide rail 61. The two linear reciprocating motion slide rails 61 are respectively installed on the front and rear sides inside the feeding roller conveyor 31 and extend into the inside of the hopper. The tops of the two upright rods 62 are respectively fixedly connected to the bottom sides of the horizontal push rod 63.

[0027] In this embodiment, for ease of system integration and maintenance, the linear reciprocating motion slide rail 61 adopts a sprocket-chain type linear reciprocating mechanism. Specifically, a separate hydraulic motor serves as the power source, driving the chain outside a pair of sprockets to rotate. The chain drives the slider to perform linear reciprocating motion inside the guide rail. This mechanism is a common type of linear reciprocating motion mechanism and will not be described in detail here. When the feeding roller conveyor 31 is full of bales, for example, when it is full of seven bales, the slider of the linear reciprocating motion slide rail 61 drives the upright rod 62 to move. The upright rod 62 drives the horizontal push rod 63 to move, thereby pushing the seven bales on the feeding pipe to the partition 11 inside the truck bed, achieving the effect of bales entering the truck bed. It should be noted that in this embodiment, for the placement of the linear reciprocating motion slide rail 61, the partition 11 adopts a comb-shaped structure, which includes a longitudinal square tube located inside the truck bed away from the feeding roller conveyor 31, and multiple horizontal square tubes fixedly installed vertically to the longitudinal square tube. The gaps between the horizontal square tubes can accommodate the linear reciprocating motion slide rail 61. Figure 8 As shown.

[0028] The side push assembly also includes a limit switch 64 fixedly installed at the top of the rear end of the feeding roller conveyor 31. When the limit switch 64 is triggered by the impact of the bale, the horizontal push rod 63 will perform a side push operation.

[0029] In this embodiment, the trigger condition for the lateral push of the horizontal push rod 63 is that the feeding roller conveyor 31 is full of seven bales of straw. Specifically, when the seventh bale of straw is picked up onto the feeding roller conveyor 31, it will move toward the sixth bale of straw behind it by being driven by several rollers 32 with power at the front end, and so on. Through impact and pushing, the bales of straw are arranged more closely together, and at the same time, they move toward the limit switch 64. When the limit switch 64 is triggered by the impact of the first bale of straw, the horizontal push rod 63 will perform a lateral push to push the seven bales of straw onto the partition 11 as a whole.

[0030] See Figures 9-11 As shown, the bale picking device with automatic unloading function also includes an anti-clogging component, which includes a swing frame 71 rotatably connected to the top of the front end of the feeding roller conveyor 31, a limit switch 72 fixedly installed on the top of the vertical shaft of the swing frame 71, a spring 73 whose two ends are fixedly connected to the horizontal arm of the swing frame 71 and the edge of the feeding roller conveyor 31 respectively, when the horizontal push rod 63 moves toward the hopper, it can push the limit switch 72 to deflect toward the direction facing the conveyor frame 22, a lifting frame 74 rotatably connected to the main shaft 21, a cone 75 fixedly connected to the top of the lifting frame 74, and a hydraulic cylinder 76 whose two ends are rotatably connected to the bottom of the lifting frame 74 and the bottom of the conveyor frame 22 respectively. When the limit switch 72 is triggered by the impact of the bale, the lifting frame 74 will deflect upward and lift the bale.

[0031] It should be noted that when the side-push assembly is working, the horizontal push rod 63, through its front-end push, deflects the push limit switch 72 about the vertical axis of the swing frame 71 toward the conveyor frame 22. If the conveyor chain 25 lifts the eighth bale at this time, after the eighth bale hits and triggers the limit switch 72, the hydraulic cylinder 76 extends, and the push lifting frame 74 deflects upward about the main shaft 21, thereby lifting the bale from the bottom and disengaging it from the conveyor chain 25, thus preventing the conveyor chain 25 from contacting the bottom of the bale. The "sawing" action ensures that the bales do not fall apart. When lifting the bales, the cone 75 pierces the bottom of the bales to maintain their stability. When the horizontal push rod 63 resets, the limit switch 72, under the contraction of the spring 73, will be driven by the swing frame 71 to rotate back to its original position. At the same time, after being released from the compression of the bales, it reaches the reset state. This state will also serve as the signal for the hydraulic cylinder 76 to retract and return to its original position. After the hydraulic cylinder 76 retracts and returns to its original position, the lifting frame 74 falls back to its reset position, and the bales fall back onto the conveyor chain 25 and continue to be conveyed to the upper feed roller conveyor 31.

[0032] In this embodiment, the anti-blocking component is located in the upper part of the conveyor frame 22. At the same time, the action time of the lateral push rod 63 should be set within the time required for the pickup ramp to pick up two bales of grass consecutively. That is, when the pickup ramp picks up the ninth bale of grass, the lateral push rod 63 should ensure that it completes one lateral push and resets during the lifting process of the ninth bale of grass by the conveyor chain 25. In this way, the ninth bale of grass will not be blocked by the eighth bale of grass that has already been lifted during the lifting process, and naturally there will be no "sawing" action of the conveyor chain 25 on the bottom of the ninth bale of grass, ensuring that the ninth bale of grass will not fall apart.

[0033] Furthermore, in this embodiment, the end of the lifting frame 74 near the main shaft 21 has a certain bending angle, such as... Figures 9-10 As shown, the purpose of this design is that when the lifting frame 74 is deflected upward so that its main body is parallel to the conveyor frame 22, the main body of the lifting frame 74 can be entirely positioned above the conveyor chain 25, so that the bottom of the hay bale can be completely detached from the conveyor chain 25.

[0034] It should be noted that in this embodiment, limit switch 64 and limit switch 72 are both existing technologies and are of the type of "impact-triggered limit switch". This is the most classic and commonly used triggering type of limit switch (also known as limit switch). Its core is to drive the internal mechanical structure to move through the physical impact of the moving parts, thereby realizing the circuit opening and closing or signal switching.

[0035] See Figures 12-14 As shown, the bale picking device with automatic unloading function also includes an unloading roller conveyor 41 for temporarily storing bales to be unloaded, which is fixedly connected to one side of the truck bed. Multiple rollers 42 are sequentially connected and rotated in the unloading roller conveyor 41 along the front and rear direction of the truck bed.

[0036] See Figures 12-14 As shown, the bale picking device with automatic unloading function also includes an unloading ramp for unloading bales to be unloaded, which includes a conveyor frame 2 52, a main shaft 2 51 rotatably connected to the front end of the conveyor frame 2 52, a hydraulic cylinder 2 53 whose two ends are respectively rotatably connected to the bottom of the conveyor frame 2 52 and the bottom of the unloading roller conveyor 41, a conveyor chain 2 55 located in the middle of the conveyor frame 2 52, and two conveyor sprockets 2 54 meshing with the two ends inside the conveyor chain 2 55. One of the conveyor sprockets 2 54 is fixedly installed in the middle of the main shaft 2 51, and the other conveyor sprocket 2 54 is rotatably connected to the end of the conveyor frame 2 52 away from the main shaft 2 51.

[0037] The pickup ramp also includes a hydraulic motor 2 56 that is fixedly connected to both ends of the main shaft 2 51. The hydraulic motor 2 56 is fixedly installed at a corresponding corner of the truck bed.

[0038] Furthermore, the pickup ramp also includes a second transmission chain 58 and multiple second transmission sprockets 57 arranged sequentially along the front and rear direction of the truck bed and meshing with each other inside the second transmission chain 58. The second transmission sprocket 57 at the rear end is fixedly installed at the end of the main shaft 51 away from the hydraulic motor 56, and the remaining several second transmission sprockets 57 are fixedly installed sequentially at the axis of each roller 42.

[0039] It should be noted that in this embodiment, the unloading roller conveyor 41 and the loading roller conveyor 31 have similar structures and work on the same principle. The unloading ramp and the picking ramp have similar structures and work on the same principle. Specifically, when the bale is pushed from the upper side of the partition 11 onto the unloading roller conveyor 41 by the horizontal push rod 63, the hydraulic motor 56 drives the main shaft 51 to rotate. The main shaft 51 drives the conveyor sprocket 54 in its middle to rotate, and then the conveyor chain 55 starts to rotate under the support of another conveyor sprocket 54. At the same time, when the hydraulic motor 56 is pushed from the upper side of the partition 11 onto the unloading roller conveyor 41, the hydraulic motor 56 drives the main shaft 51 to rotate. The main shaft 51 drives the conveyor sprocket 54 in its middle to rotate, and then the conveyor chain 55 starts to rotate under the support of another conveyor sprocket 54. When the pressure motor 256 drives the main shaft 251 to rotate, the main shaft 251 will also drive the transmission sprocket 257 installed at one end to rotate, which in turn drives the transmission chain 258 outside the transmission sprocket 257 to rotate. The transmission chain 258 will then drive the remaining transmission sprockets 257 to rotate, and then the transmission sprockets 257 will drive the corresponding rollers 242 to rotate, thereby conveying the bales of straw on the unloading roller 41 one by one to the conveyor frame 252, until they are sent out by the conveyor chain 255, achieving the unloading effect.

[0040] The transfer action between the partition 11 and the unloading roller conveyor 41 during the unloading of the aforementioned bales can be referenced to the transfer action between the partition 11 and the loading roller conveyor 31 during the loading of the bales. Specifically, when unloading the bales, it should start from the lowest partition 11 at this time. First, select one lifting cylinder 13 (temporarily designated as the first lifting cylinder 13) at each end of the truck bed. After being pushed and pulled laterally by the corresponding two side push cylinders 15 (temporarily designated as the first side push cylinders 15), the lifting blocks 14 at the top of the two first lifting cylinders 13 will be lifted. The remaining two lifting cylinders 13 (temporarily designated as the second lifting cylinders 13) are pushed and pulled laterally by the corresponding two side-push cylinders 15 (temporarily designated as the second side-push cylinders 15), causing the lifting blocks 14 at the top of the two second lifting cylinders 13 to abut against the bottom of the support plates 12 at both ends of the second-to-last layer of partition 11 from bottom to top. This causes the two first lifting cylinders 13 to retract, causing the bottom layer of partition 11 to move downwards and become flush with the unloading roller conveyor 41. This also causes the top of the bales on the lowest partition 11 to detach from the bottom of the second-to-last partition 11. Then, the horizontal push rod 63 moves to push the bales row by row onto the unloading roller conveyor 41 to transfer the bales. When unloading the bales on the second-to-last partition 11 (now the lowest partition 11), the two first lifting cylinders 13 extend and, under the push and pull of the corresponding first side push cylinders 15, cause the lifting block 14 at its top to bypass the obstruction of other support plates 12 and abut against the third-to-last partition 11 (now the second-to-last partition 11). The bottom of the support plate 12 of the plate 11) then mimics the previous action, and the two second lifting cylinders 13 retract, so that the bottommost partition 11 moves down to be flush with the unloading roller conveyor 41. At the same time, the top of the bales on the bottommost partition 11 is removed from the bottom of the second to last partition 11. Then the horizontal push rod 63 moves to push the bales row by row onto the unloading roller conveyor 41 to realize the transfer of the bales. By repeatedly performing the above steps, the partition 11 moves down one by one and the bales are unloaded layer by layer through the alternating action of the cylinders.

[0041] Compared to the existing unloading method where the entire hay bale is dropped onto the ground by tipping over the truck bed, the unloading system in this solution has the technical advantages of adjustable unloading height and controllable unloading quantity, making it suitable for a wider range of usage environments.

[0042] In the above scheme, the hydraulic system will be driven by the tractor. In order to improve the cooling effect of the hydraulic oil, a hydraulic oil radiator will be added. Both of these are common technical means in the field of agricultural machinery, and will not be elaborated here.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bale picking device with automatic unloading function, characterized in that, include: The cargo platform includes multiple partitions (11) slidably connected in the cargo bed, support plates (12) fixedly connected to both ends of each partition (11), two pairs of lifting cylinders (13) slidably connected to the front and rear ends of the cargo bed, lifting blocks (14) fixedly installed on the top of each lifting cylinder (13), and side-push cylinders (15) for laterally moving the lifting cylinders (13). The pickup ramp includes a conveyor frame (22) and a main shaft (21) rotatably connected to the rear end of the conveyor frame (22). The feeding roller conveyor (31) is fixedly connected to one side of the hopper, and the main shaft (21) is rotatably connected to the front end of the feeding roller conveyor (31); The side-push assembly includes a horizontal push rod (63) disposed above the feed roller conveyor (31); and, The anti-blocking component includes a swing frame (71) rotatably connected to the top of the front end of the feeding roller conveyor (31), a limit switch (72) fixedly installed on the top of the vertical shaft of the swing frame (71), a spring (73) fixedly connected at both ends to the horizontal arm of the swing frame (71) and the edge of the feeding roller conveyor (31) respectively, which can push the limit switch (72) to deflect in the direction facing the conveyor frame (22) when the horizontal push rod (63) moves toward the hopper, a lifting frame (74) rotatably connected to the main shaft (21), and a cone (75) fixedly connected to the top of the lifting frame (74). When the limit switch (72) is triggered by the impact of the bale, the lifting frame (74) will deflect upward and lift the bale.

2. The bale picking device with automatic unloading function according to claim 1, characterized in that: The telescopic ends of the four side-push cylinders (15) are fixedly connected to the sides of the corresponding lifting cylinders (13), and the cylinder ends of the four side-push cylinders (15) are fixedly connected to the four corners of the corresponding truck bed.

3. A bale picking device with automatic unloading function according to claim 2, characterized in that: The pickup ramp also includes a hydraulic cylinder (23) that is rotatably connected at both ends to the bottom of the conveyor frame (22) and the bottom of the loading roller (31), a conveyor chain (25) located in the middle of the conveyor frame (22), and two conveyor sprockets (24) meshing with the two ends inside the conveyor chain (25). One of the conveyor sprockets (24) is fixedly installed in the middle of the main shaft (21), and the other conveyor sprocket (24) is rotatably connected to the end of the conveyor frame (22) away from the main shaft (21). The pickup ramp also includes a hydraulic motor (26) fixedly connected to one end of the main shaft (21), and the hydraulic motor (26) is fixedly installed at the corresponding corner of the truck bed.

4. A bale picking device with automatic unloading function according to claim 3, characterized in that: Multiple rollers (32) are connected in sequence along the front and rear direction of the hopper inside the feeding roller conveyor (31). The pickup ramp also includes a drive chain (28) and multiple drive sprockets (27) arranged sequentially along the front and rear direction of the truck bed and meshing together on the drive chain (28). The drive sprocket (27) at the front end is fixedly installed at the end of the main shaft (21) away from the hydraulic motor (26), and the remaining drive sprockets (27) are fixedly installed at the center of several rollers (32) close to the main shaft (21).

5. A bale picking device with automatic unloading function according to claim 4, characterized in that: The side push assembly also includes a pair of linear reciprocating slide rails (61) arranged vertically in the front and rear directions of the bucket, and a vertical rod (62) fixedly connected to the top of the slider of each linear reciprocating slide rail (61). The two linear reciprocating slide rails (61) are respectively installed on the front and rear sides inside the feeding roller conveyor (31) and extend into the inside of the bucket. The tops of the two vertical rods (62) are respectively fixedly connected to the bottom sides of the horizontal push rod (63). The side push assembly also includes a limit switch (64) fixedly installed at the top of the rear end of the feeding roller conveyor (31). When the limit switch (64) is triggered by the impact of the bale, the horizontal push rod (63) will perform a side push operation.

6. A bale picking device with automatic unloading function according to claim 5, characterized in that: The anti-blocking assembly also includes a hydraulic cylinder three (76) whose two ends are rotatably connected to the bottom of the lifting frame (74) and the bottom of the conveyor frame (22) respectively.

7. A bale picking device with automatic unloading function according to claim 6, characterized in that: It also includes a discharge roller conveyor (41) for temporarily storing the straw bales to be unloaded, which is fixedly connected to one side of the truck bed. Multiple rollers (42) are connected to the discharge roller conveyor (41) in sequence along the front and rear direction of the truck bed.

8. A bale picking device with automatic unloading function according to claim 7, characterized in that: It also includes a discharge ramp for unloading the bales to be unloaded, which includes a second conveyor frame (52), a second main shaft (51) rotatably connected to the front end of the second conveyor frame (52), a second hydraulic cylinder (53) rotatably connected at both ends to the bottom of the second conveyor frame (52) and the bottom of the discharge roller conveyor (41), a second conveyor chain (55) located in the middle of the second conveyor frame (52), and two second conveyor sprockets (54) meshing with the two ends inside the second conveyor chain (55), one of the second conveyor sprockets (54) being fixedly installed in the middle of the second main shaft (51), and the other second conveyor sprocket (54) being rotatably connected to the end of the second conveyor frame (52) away from the second main shaft (51); The pickup ramp also includes a hydraulic motor 2 (56) fixedly connected to the two ends of the main shaft 2 (51), and the hydraulic motor 2 (56) is fixedly installed at the corresponding corner of the truck bed.

9. A bale picking device with automatic unloading function according to claim 8, characterized in that: The pickup ramp also includes a second transmission chain (58) and multiple second transmission sprockets (57) arranged sequentially along the front and rear direction of the truck bed and meshing together inside the second transmission chain (58). The second transmission sprocket (57) at the last end is fixedly installed at the end of the main shaft (51) away from the hydraulic motor (56), and the remaining several second transmission sprockets (57) are fixedly installed at the axis of each roller (42).

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