An automatic bag sewing mechanism

Abstract

This utility model discloses an automatic bag-sewing mechanism, including a frame and a bag-sewing machine. The bag-sewing machine is laterally movable on the frame via a laterally arranged sewing traction mechanism. A push rod mechanism is provided on the frame, comprising a push rod seat and a cantilever push rod that is laterally telescopically mounted on the push rod seat. The cantilever end of the cantilever push rod is horizontally aligned with the sewing opening of the bag-sewing machine, with a space between them for a continuous bag to pass vertically. The push rod seat is longitudinally movable on the frame via a longitudinally arranged push rod traction mechanism, allowing the cantilever end of the cantilever push rod to move horizontally into the sewing opening of the bag-sewing machine. This utility model has the advantages of ingenious structural design and the ability to push continuous bags into the bag-sewing machine for sewing.

Description

Technical Field

[0001] This utility model relates to the field of harvester technology, and in particular to an automatic bag-sewing mechanism. Background Technology

[0002] A harvester is an agricultural machine used for the efficient harvesting of crops such as rice and wheat. It can complete operations such as cutting, threshing, and cleaning, significantly improving agricultural production efficiency. Harvesters are generally divided into small, medium, and large combine harvesters. Small harvesters are compact in size and suitable for harvesting small plots of land, such as hilly areas. However, due to their limited size, small harvesters usually do not have an onboard grain bin; the grain is directly bagged after threshing. Since the capacity of the bag is limited, it needs to be replaced once it is full to continue working. Currently, bag replacement is mainly done manually, which increases the labor intensity of the operators and reduces work efficiency. Therefore, the applicant is considering using continuous material bags for bagging. During the bagging process, a sewing machine is used to sew the continuous material bags, which are then cut into individual bags, thus eliminating the need for frequent bag replacement. However, how to feed the continuous material bags into the sewing machine for sewing is a problem that urgently needs to be solved. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide an automatic sewing mechanism with an ingenious structural design that can push continuous material bags into the sewing machine for sewing.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An automatic bag-sewing mechanism includes a frame and a bag-sewing machine. The bag-sewing machine is laterally movable on the frame via a laterally arranged sewing traction mechanism. A push rod mechanism is provided on the frame, the push rod mechanism including a push rod seat and a cantilever push rod that is laterally telescopically arranged on the push rod seat. The cantilever end of the cantilever push rod is horizontally aligned with the sewing opening of the bag-sewing machine, and there is space between them for a continuous bag to pass vertically. The push rod seat is longitudinally movable on the frame via a longitudinally arranged push rod traction mechanism, so that the cantilever end of the cantilever push rod can be horizontally moved into the sewing opening of the bag-sewing machine.

[0006] In use, the continuous bag passes between the cantilever end of the cantilever pusher and the sewing machine. During sewing, the pusher traction mechanism moves the pusher seat and the cantilever pusher towards the sewing machine. The laterally retractable cantilever pusher then pushes the middle of the continuous bag into the sewing opening of the sewing machine. At this point, the sewing machine can move laterally under the action of the sewing traction mechanism to complete the sewing. After sewing, the cantilever pusher can be retracted laterally to disengage from the sewn part of the continuous bag.

[0007] Furthermore, the push rod mechanism is arranged in two sets symmetrically along the transverse direction.

[0008] In this way, the continuous material bag is pushed into the sewing opening of the bag sewing machine from both sides by the cantilever pushers on the two sets of pusher mechanisms, which makes the sewing thread smoother and more reliable. In addition, the symmetrical pusher mechanism can also shorten the maximum cantilever length of each cantilever pusher, reduce the maximum bending moment that the cantilever pusher bears, and allow the selection of smaller cantilever pushers, thereby reducing costs while ensuring reliability.

[0009] Furthermore, the cantilever push rods on the two sets of push rod mechanisms can abut against each other when extended.

[0010] Furthermore, the cantilever push rod is an electric push rod mounted on the push rod seat.

[0011] Furthermore, the push rod seat has a guide hole that extends laterally, and the cantilever push rod is axially movable and passes through the guide hole; the push rod seat is provided with a push rod drive mechanism for driving the cantilever push rod to move axially.

[0012] This avoids the reverse force generated by pushing the continuous material bags being directly applied to the push rod drive mechanism, thus reducing the probability of damage to the drive components. If the cantilever push rod is damaged, it can be repaired by replacing it, significantly reducing maintenance costs.

[0013] Furthermore, the push rod drive mechanism includes a push rod drive motor orthogonally arranged with the cantilever push rod, and the output end of the push rod drive motor is provided with a friction wheel that frictionally contacts the cantilever push rod.

[0014] In this way, the push rod drive motor drives the friction wheel to rotate, and the friction wheel can apply axial friction force to the cantilever push rod, thereby realizing the axial extension and retraction of the cantilever push rod.

[0015] Furthermore, the push rod drive mechanism is a linearly extendable cylinder, hydraulic cylinder, or electric push rod.

[0016] Furthermore, the sewing traction mechanism includes at least two horizontally arranged support rods, on which support blocks are slidably mounted, and the sewing machine is mounted on the support blocks; a linear drive mechanism for driving the support blocks to slide along the support rods is provided between the support blocks and the frame.

[0017] Furthermore, the push rod mechanism has two gripper mechanisms arranged symmetrically in the transverse direction above it. The gripper mechanism includes mechanical jaws that can clamp continuous bags. The gripping openings of the two mechanical jaws are arranged opposite each other, so that the two sides of the continuous bag can be placed in the gripping openings of the corresponding mechanical jaws. The mechanical jaws can be installed on the frame in a longitudinal or / and vertical manner through a bag pulling traction mechanism.

[0018] In this way, since both sides of the continuous bag can be positioned within the gripping openings of the mechanical jaws, the continuous bag can pass through when the gripping openings are open. Once the gripping openings of the mechanical jaws are closed, they can clamp the sides of the continuous bag. By gripping both sides of the continuous bag through the gripper mechanism, a lifting effect can be achieved on the continuous bag during the bagging process, ensuring reliable bagging operation.

[0019] Furthermore, the bag pulling mechanism includes a vertically arranged first linear drive mechanism, two of which are arranged longitudinally, and a longitudinally arranged second linear drive mechanism is mounted on the drive end of the two first linear drive mechanisms, and the mechanical gripper is installed at the drive end of the second linear drive mechanism.

[0020] In this way, the vertical movement of the first linear drive mechanism and the longitudinal movement of the second linear drive mechanism can realize the movement of the mechanical gripper in both the vertical and longitudinal directions. When moving vertically, the continuous material bags can be pulled out sequentially from the bag tube; when moving longitudinally, the sewn continuous material bags can be pulled out horizontally from the sewing machine.

[0021] In summary, this utility model has the advantages of ingenious structural design, which enables continuous material bags to be pushed into the sewing machine for sewing. Attached Figure Description

[0022] Figure 1 and Figure 2 This is a schematic diagram of the overall structure of this embodiment.

[0023] Figure 3 This is a side view of the structure in this embodiment.

[0024] Figure 4 This is a schematic diagram of the frame structure in this embodiment.

[0025] Figure 5 This is a structural diagram of the frame, sewing machine, and push rod mechanism.

[0026] Figure 6 This is a schematic diagram of the sewing machine and the push rod mechanism.

[0027] Figure 7 This is a schematic diagram of the push rod mechanism.

[0028] Figure 8This is a schematic diagram of the gripper mechanism.

[0029] Figure 9 This is a schematic diagram of another type of cantilever push rod. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to an embodiment of a harvester.

[0031] In practical implementation: such as Figures 1 to 8 As shown, a harvester includes a frame 1 fixedly connected to the harvester body. A hopper 2 for receiving materials is provided at the top of the frame 1. A bagging tube 21 for continuously shrinking and covering bags is connected to the outlet of the hopper 2. A bag-releasing roller mechanism 3 for sequentially pulling out continuous bags is pressed onto the lower end of the bagging tube 21. A sewing machine 51 for sewing continuous bags is provided on the frame 1. The sewing machine 51 is laterally movable on the frame 1 via a laterally arranged sewing traction mechanism 52, and the sewing opening faces the direction of the bagging tube 21. A push rod mechanism 6 is provided below the hopper 2. The push rod mechanism 6 includes a push rod seat and a horizontally arranged cantilever push rod 61. The cantilever push rod 61 is located on the side of the bag tube 21 away from the sewing machine 51 and is horizontally opposite to the sewing opening of the sewing machine 51. The cantilever push rod 61 is longitudinally movable on the frame 1 through a longitudinally arranged push rod traction mechanism 62, so that the cantilever push rod 61 can be horizontally moved into the sewing opening of the sewing machine 51. The frame 1 is provided with a cutting device 7 for cutting continuous bags. The cutting device 7 is laterally movable on the frame 1. The bag tube 21 has a horizontally arranged support mechanism 8 below it.

[0032] Before bagging, the continuous material bag is first placed over the bagging tube, and the continuous material bag is folded and contracted as much as possible on the bagging tube. The bag-feeding pressure roller mechanism presses down on the continuous material bag. During bagging, the harvested grain is collected by the hopper and falls into the continuous material bag from the bagging tube. When the grain in the continuous material bag reaches a certain amount, the push rod traction mechanism drives the cantilever push rod to move towards the sewing machine. Since the cantilever push rod is set horizontally and located on the side of the bagging tube away from the sewing machine, that is, the continuous material bag is located between the cantilever push rod and the sewing machine, when the cantilever push rod moves horizontally towards the sewing machine under the action of the push rod traction mechanism, it will push the middle part of the continuous material bag into the sewing opening of the sewing machine. At this time, the sewing machine can move laterally under the action of the sewing traction mechanism, thus completing the sewing. After completing two interval sewings, the cutting device is activated to cut the area between the two sewn sections, thus separating the bottom part that has been filled and packaged from the continuous material bag. In practice, the bottom of the hopper 2 can be equipped with an openable hopper door so that the grains can be temporarily stored during the sewing process to avoid the impact of continuous material falling during the sewing work.

[0033] In this embodiment, the supporting mechanism 8 is a belt conveyor installed at the bottom of the frame 1, and a weighing device is installed inside the belt conveyor. During the bagging process, the belt conveyor can provide support for the grain, preventing the grain from exerting a continuous downward force on the continuous bags, thus facilitating bagging. In addition, the weighing device can weigh the bagged grain to determine the bagging quantity. Once the bagging quantity reaches the set amount, sewing and cutting can be performed. After cutting, the belt conveyor can be started to unload the bagged grain onto the ground.

[0034] like Figure 8 As shown, the bag-covering tube 21 has two gripping mechanisms 4 arranged symmetrically in the transverse direction below it. The gripping mechanism 4 includes mechanical grippers 41 that can clamp continuous bags. The gripping openings of the two mechanical grippers 41 are arranged opposite each other, and the minimum distance between them is less than the transverse dimension of the bag-covering tube 21, so that the two sides of the continuous bag can be placed within the gripping openings of the corresponding mechanical grippers. The mechanical grippers 41 can be installed on the frame 1 in a longitudinal and vertical manner through the bag pulling traction mechanism 42.

[0035] Because the two sides of the continuous bag can be positioned within the gripping openings of the mechanical jaws, the continuous bag can pass through when the gripping openings are open. Once the gripping openings of the mechanical jaws are closed, they can clamp the sides of the continuous bag. The mechanical jaws move longitudinally or vertically under the action of the bag-pulling traction mechanism, generating a pulling force on the continuous bag, thus pulling it out sequentially from the bag-releasing pressure roller mechanism. Additionally, the gripping mechanism on both sides of the continuous bag also provides a lifting effect during the bagging process, preventing the weight of the bagged grain from being applied to the continuous bag above the gripping mechanism, thereby ensuring that the continuous bag is reliably fitted onto the bagging tube.

[0036] Specifically, the bag-pulling mechanism 42 includes a vertically arranged first linear drive mechanism 421, of which two are arranged longitudinally. A longitudinally arranged second linear drive mechanism 422 is mounted on the drive end of each of the two first linear drive mechanisms 421. The mechanical gripper 41 is installed at the drive end of the second linear drive mechanism 422. Thus, by the vertical movement of the first linear drive mechanism and the longitudinal movement of the second linear drive mechanism, the mechanical gripper can move vertically and longitudinally. During vertical movement, the continuous bags can be pulled sequentially from the bag-covering tube; during longitudinal movement, the sewn continuous bags can be pulled horizontally out of the sewing machine.

[0037] In this embodiment, both the second linear drive mechanism 422 and the push rod traction mechanism 62 include two support seats, and at least two parallel guide rods are connected between the two support seats. A slide table is slidably fitted on the guide rod. A linear drive mechanism for driving the slide table to slide along the guide rod is provided between the slide table and the frame 1. The linear drive mechanism includes synchronous pulleys respectively mounted on the two support seats, and a synchronous belt is sleeved on the two synchronous pulleys. A drive motor is provided on any one of the synchronous pulleys. One side of the synchronous belt is fixedly connected to the slide table. The mechanical gripper 41 and the cantilever push rod 61 are respectively mounted on the corresponding slide tables.

[0038] The first linear drive mechanism 421 includes a vertically arranged guide rod and a lead screw, one end of which is connected to a drive motor; the second linear drive mechanism 422 has a vertically through guide hole and a threaded hole corresponding to the guide rod and the lead screw respectively, and the guide rod and the lead screw are respectively fitted into the corresponding guide hole and threaded hole.

[0039] like Figure 5 As shown, the sewing traction mechanism 52 includes two horizontally arranged support rods 521, and a support block 522 is slidably mounted on the two support rods 521. The sewing machine 51 is mounted on the support block 522. A linear drive mechanism for driving the support block 522 to slide along the support rods 521 is provided between the support block 522 and the frame 1. The linear drive mechanism includes synchronous pulleys mounted at both ends of the support rods 521, a synchronous belt is sleeved on the two synchronous pulleys, and a drive motor is provided on any one of the synchronous pulleys. One side of the synchronous belt is fixedly connected to the support block 522.

[0040] In specific implementations, the linear drive mechanism may also employ a lead screw and nut mechanism, a telescopic cylinder mechanism, a gear and rack mechanism, a linear motor, or a chain drive mechanism, etc.

[0041] like Figure 4 and Figure 5 As shown, the bag-feeding pressure roller mechanism 3 includes two pressure rollers symmetrically arranged radially along the bag-covering tube 21. The two ends of the pressure rollers are rotatably mounted on the frame 1 and are close to or in contact with the bag-covering tube 21. In specific implementations, to ensure reliable pressing and reliable bag pulling, an elastic compensation structure can also be provided on the bag-feeding pressure roller mechanism 3 to provide a pressing force between the bag-feeding pressure roller mechanism 3 and the bag-covering tube 21. The elastic compensation structure can be an elastic rubber sleeve fitted on the pressure roller, or other existing structures.

[0042] In this embodiment, as Figure 6As shown, the cutting device 7 includes a cutting motor 71 and a cutting blade 72 mounted on the output shaft of the cutting motor 71. The cutting motor 71 is mounted on the bag sewing machine 51 and faces the bag-covering tube 21. In this way, the cutting device 7 can move laterally together with the bag sewing machine. When the cutting motor is not started, the cutting blade does not cut the continuous bags. Only when the cutting motor is started will the cutting blade cut the continuous bags.

[0043] To facilitate the smooth disengagement of the cantilever push rod 61 from the sewn continuous material bag, the cantilever push rod 61 is retractably mounted on the push rod seat. In this embodiment, the cantilever push rod 61 is a retractable electric push rod, and two are symmetrically arranged laterally. Pushing the continuous material bag into the sewing opening of the bag sewing machine from both sides using two electric push rods results in a smoother and more reliable stitch. Furthermore, the symmetrical push rod mechanism shortens the maximum cantilever length of each cantilever push rod, reducing the maximum bending moment it bears. Smaller cantilever push rods can be selected, reducing costs while maintaining reliability.

[0044] In specific implementations, the push rod mechanism 6 can also adopt other structures, such as: the push rod seat has a guide hole that extends laterally, and the cantilever push rod 61 is axially movable and passes through the guide hole; the push rod seat is provided with a push rod drive mechanism for driving the cantilever push rod 61 to move axially. This avoids the reverse force generated by pushing the continuous material bag being directly applied to the push rod drive mechanism, thereby reducing the probability of damage to the drive components. If the cantilever push rod is damaged, it can be repaired by replacing the cantilever push rod, greatly reducing maintenance costs.

[0045] like Figure 9 As shown, the push rod drive mechanism includes a push rod drive motor 63 orthogonally arranged to the cantilever push rod 61. The output end of the push rod drive motor 63 is provided with a friction wheel 64 that frictionally contacts the cantilever push rod 61. Two sets of push rod drive motors 63 and friction wheels 64 are symmetrically arranged radially along the cantilever push rod 61. The push rod drive motor 63 drives the friction wheels 64 to rotate, thus applying axial frictional force to the cantilever push rod, thereby achieving axial extension and retraction of the cantilever push rod. Of course, the push rod drive mechanism can also employ existing drive mechanisms such as linearly extendable cylinders, hydraulic cylinders, or electric push rods.

[0046] In this embodiment, after the harvester completes threshing, the grain is received by the hopper and falls into a continuous bag along the bagging tube. The continuous bag is pulled out of the bagging tube by the gripper mechanism or the weight of the grain and finally falls onto the support mechanism 8. At this time, the gripper mechanism maintains its grip on the continuous bag. As grain continuously falls into the continuous bag, it is weighed by a weighing device. Once the set weight is reached, sewing begins. At this time, the hopper door is closed, and the grain is temporarily stored in the hopper. During sewing, the cantilever push rod is fully extended, and the push rod traction mechanism moves the cantilever push rod towards the sewing machine. The cantilever push rod pushes the middle of the continuous bag into the sewing machine. During this process, the gripper mechanism assists in pulling the bag to ensure that the continuous bag can smoothly enter the sewing opening of the sewing machine. The sewing machine moves laterally under the action of the sewing traction mechanism to complete the sewing. The sewing operation needs to be performed twice, with a gap between the two sewings. One sewing is to seal the lower bag, and the other sewing is to seal the bottom of the upper continuous bag. After the two sewings are completed, the cutting device is activated to cut the area between the two sewings, separating the packaged bag from the continuous bag, and then sending it horizontally off to the harvester via a belt conveyor.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic bag-sewing mechanism, characterized in that, The system includes a frame (1) and a sewing machine (51). The sewing machine (51) is laterally movable on the frame (1) via a sewing traction mechanism (52) arranged laterally. The frame (1) is provided with a push rod mechanism (6). The push rod mechanism (6) includes a push rod seat and a cantilever push rod (61) arranged laterally on the push rod seat. The cantilever end of the cantilever push rod (61) is horizontally opposite to the sewing opening of the sewing machine (51), and there is a space between them for a continuous bag to pass vertically. The push rod seat is longitudinally movable on the frame (1) via a push rod traction mechanism (62) arranged longitudinally, so that the cantilever end of the cantilever push rod (61) can be horizontally moved into the sewing opening of the sewing machine (51).

2. The automatic bag-sewing mechanism as described in claim 1, characterized in that, The push rod mechanism (6) is arranged in two sets symmetrically along the transverse direction.

3. The automatic bag-sewing mechanism as described in claim 1, characterized in that, The cantilever push rods (61) on the two sets of push rod mechanisms (6) can abut against each other in the extended state.

4. The automatic bag-sewing mechanism as described in claim 1, characterized in that, The cantilever push rod (61) is an electric push rod installed on the push rod seat.

5. The automatic bag-sewing mechanism as described in claim 1, characterized in that, The push rod seat has a guide hole that is horizontally through it, and the cantilever push rod (61) is axially movable and passes through the guide hole; the push rod seat is provided with a push rod drive mechanism for driving the cantilever push rod (61) to move axially.

6. The automatic bag-sewing mechanism as described in claim 5, characterized in that, The push rod drive mechanism includes a push rod drive motor orthogonally arranged with the cantilever push rod (61), and the output end of the push rod drive motor is provided with a friction wheel that is in frictional contact with the cantilever push rod (61).

7. The automatic bag-sewing mechanism as described in claim 5, characterized in that, The push rod drive mechanism is a linearly extendable cylinder, hydraulic cylinder, or electric push rod.

8. The automatic bag-sewing mechanism as described in claim 1, characterized in that, The sewing traction mechanism (52) includes at least two horizontally arranged support rods (521), and support blocks (522) are slidably mounted on the two support rods (521). The sewing machine (51) is mounted on the support blocks (522). A linear drive mechanism for driving the support blocks (522) to slide along the support rods (521) is provided between the support blocks (522) and the frame (1).

9. The automatic bag-sewing mechanism as described in claim 1, characterized in that, The push rod mechanism (6) has two gripper mechanisms (4) arranged symmetrically in the transverse direction above it. The gripper mechanism (4) includes mechanical grippers (41) that can clamp continuous bags. The gripping openings of the two mechanical grippers (41) are arranged opposite to each other, so that the two sides of the continuous bag can be placed in the gripping openings of the corresponding mechanical grippers. The mechanical grippers (41) can be installed on the frame (1) in a longitudinal or / and vertical manner through the bag pulling traction mechanism (42).

10. The automatic bag-sewing mechanism as described in claim 9, characterized in that, The bag pulling mechanism (42) includes a vertically arranged first linear drive mechanism (421), and there are two first linear drive mechanisms (421) arranged longitudinally. A second linear drive mechanism (422) is mounted on the drive end of the two first linear drive mechanisms (421), and the mechanical gripper (41) is installed at the drive end of the second linear drive mechanism (422).

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