Automatic welding tool for corn machine pulling stem roller

Abstract

The application relates to a corn machine stem pulling roller automatic welding tool, belonging to the field of agricultural machinery manufacturing, which comprises a rotating frame, both sides of the rotating frame are connected with positioners capable of driving the rotating frame to rotate, the rotating frame is connected with a bottom plate, a plurality of machining ports are arranged on the bottom plate at intervals, a limiting plate capable of placing one end of a stem pulling pipe and abutting against the end of the stem pulling pipe is fixedly connected to the bottom plate on one side of each positioner close to each machining port, a jacking cylinder capable of jacking the end of the stem pulling roller placed in the machining port is arranged at the other end of each machining port, and a plurality of groups of pressing assemblies capable of pressing the stem pulling pipe in the machining port and a plurality of sawtooth stem pulling plates and a plurality of stem pulling plates required to be connected are further arranged on the bottom plate close to each machining port. The application has the effect of facilitating the welding process of the stem pulling roller by the staff.

Description

Technical Field

[0001] This application relates to the field of agricultural machinery manufacturing, and in particular to an automatic welding fixture for corn harvester stalk rollers. Background Technology

[0002] With the development of agricultural mechanization, the traditional method of harvesting corn—where farmers manually break corn stalks and collect them—is gradually being abandoned. Currently, corn harvesters are widely used for this process.

[0003] In corn harvesters, the corn stalk puller roller plays a crucial role as a key component for harvesting corn. The rotation of the puller roller enables the harvesting of corn. Currently, most corn stalk puller rollers use a toothed plate combination design. This involves evenly spaced and fixedly connected toothed puller plates and puller plates on the outer wall of the puller tube, with the toothed puller plates and puller plates arranged alternately. This arrangement increases the working efficiency of the corn ear-picking roller.

[0004] Because multiple serrated stem-pulling plates and stalk-pulling boards need to be welded to the sidewalls of the corn stalk-pulling tube, it is necessary to position the stalk-pulling tube and the connected serrated stem-pulling plates and stalk-pulling boards during the welding process. Currently, the common method for positioning the stalk-pulling tube, serrated stem-pulling plates, and stalk-pulling boards is to use a fixture. First, the serrated stem-pulling plates are placed in the groove in the middle of the fixture. Then, the stalk-pulling boards are placed in the grooves on both sides of the fixture. Finally, the stalk-pulling tube is placed in the middle position of the fixture to fit against the serrated stem-pulling plates and stalk-pulling boards, thus achieving the positioning of the stalk-pulling tube and the serrated stem-pulling plates and stalk-pulling boards. After the serrated stem-pulling plate and the stem-pulling plate are connected on one side, the worker flips the stem-pulling tube over and places the stem-pulling plate and the serrated stem-pulling plate into the groove in sequence. The stem-pulling tube is then connected to the stem-pulling plate and the serrated stem-pulling plate again to achieve the connection between the stem-pulling tube and multiple serrated stem-pulling plates and the stem-pulling plate. After that, the connected stem-pulling tube, serrated stem-pulling plate and the stem-pulling plate are removed from the tooling and welded.

[0005] Because the current tooling requires the stem tube to be placed on the tooling and tack-fitted with the serrated stem tube and the stem tube plate during the welding process, after the tack-fitting on one side is completed, the staff needs to flip the stem tube to tack-fit the stem tube with the remaining serrated stem tube and the stem tube plate again. After the tack-fitting of the stem tube with the serrated stem tube and the stem tube plate is completed, the stem tube needs to be removed from the tooling and the serrated stem tube and the stem tube plate connected to the stem tube need to be welded. This makes the welding process cumbersome and the welding efficiency low. Summary of the Invention

[0006] To facilitate the welding process of the stalk puller roller, this application provides an automatic welding fixture for the stalk puller roller of a corn harvester.

[0007] The automatic welding fixture for corn harvester stalk rollers provided in this application adopts the following technical solution: An automatic welding fixture for corn stalk pullers includes a rotating frame. Positioners capable of driving the rotating frame to rotate are connected to both sides of the rotating frame. A base plate is connected to the rotating frame, and multiple processing ports are spaced apart on the base plate. A limiting plate is fixedly connected to the base plate on the side of each processing port closest to one of the positioners, allowing one end of the stalk puller to be placed and abutting against the end of the stalk puller. A clamping cylinder is provided at the other end of each processing port to clamp the end of the stalk puller placed at the processing port. Multiple clamping components are also provided on the base plate near each processing port to clamp the stalk puller at the processing port, as well as multiple serrated stalk pullers and multiple stalk pullers to be connected.

[0008] By adopting the above technical solution, when it is necessary to connect the stem-pulling tube to multiple serrated stem-pulling plates and multiple stem-pulling plates to be connected, the stem-pulling tube is placed at the processing port, and one end of the stem-pulling tube is overlapped with the limiting plate, so that the end side wall of the stem-pulling tube abuts against the limiting plate. The other end of the stem-pulling tube is tightened by a clamping cylinder, and multiple serrated stem-pulling plates and multiple stem-pulling plates are placed in appropriate positions on the side wall of the stem-pulling tube. The clamping assembly is used to position and fit the stem-pulling tube to the multiple serrated stem-pulling plates and multiple stem-pulling plates to be connected. During the welding process, the positioner is activated to rotate the rotating frame, the stem-pulling tube on the rotating frame, and the multiple serrated stem-pulling plates and multiple stem-pulling plates that need to be connected. This achieves a complete welding process for the stem-pulling roller, reducing the need for workers to flip the stem-pulling tube and place the serrated stem-pulling plates and multiple stem-pulling plates twice before welding. After welding, workers need to remove the stem-pulling roller from the tooling for welding, thus reducing the trouble of welding the stem-pulling roller from all directions.

[0009] Optionally, a plurality of positioning plates are fixedly connected to the base plate. The clamping assembly includes a positioning base fixedly connected to the positioning plate. A first positioning plate and a second positioning plate are detachably connected to the positioning base. Each first positioning plate, each second positioning plate, and each positioning base are provided with a slot for placing the stem-pulling tube, the serrated stem-pulling plate, and the stem-pulling plate. A clamping plate is rotatably connected to one side of the base plate of each positioning base. The clamping plate can cover the first positioning plate and the second positioning plate to fix the relative position between the first positioning plate and the second positioning plate and the positioning base.

[0010] By adopting the above technical solution, when it is necessary to connect the stem-pulling tube to the multiple serrated stem-pulling plates and multiple stem-pulling plates that need to be connected through the clamping assembly, the serrated stem-pulling plates and stem-pulling plates are first interleaved and inserted into the slots of the positioning base, the first positioning plate and the second positioning plate. Then, the stem-pulling roller is placed between the first positioning plate, the second positioning plate and the positioning base. Then, the first positioning plate, the second positioning plate and the positioning base are spliced ​​together, and the clamping plate is placed on the upper side of the first positioning plate and the second positioning plate, thereby fixing the position between the first positioning plate, the second positioning plate and the positioning base. This further realizes the restriction of the position between the stem-pulling tube and the multiple serrated stem-pulling plates and the multiple stem-pulling plates through the first positioning plate, the second positioning plate and the positioning base.

[0011] Optionally, a first pressure plate is fixedly connected to one end of each pressure plate away from the rotation point connected to the base plate, and a rotary pressure cylinder is fixedly connected to the base plate on one side of each first pressure plate, and a fastening plate capable of pressing adjacent first pressure plates is fixedly connected to the piston rod of each rotary pressure cylinder.

[0012] By adopting the above technical solution, after the clamping plate is placed on the first positioning plate and the second positioning plate, the rotary clamping cylinder is activated. The rotary clamping cylinder drives the fastening plate to rotate to the upper side of the adjacent first pressure plate and abut against the first pressure plate. This achieves the restriction of the position of the first pressure plate and the clamping plate connected to the first pressure plate by the rotary clamping cylinder. This reduces the occurrence of the phenomenon that the clamping plate is separated from the first and second positioning plates during the rotation of the rotating frame driven by the positioner, which makes it difficult for the stem-pulling tube to be connected to the multiple serrated stem-pulling plates and multiple stem-pulling plates that need to be connected, thus preventing the stem-pulling roller from being fully welded.

[0013] Optionally, a positioning sleeve is fixedly connected to the base plate of the pull tube near the tightening cylinder, and a positioning pin that simultaneously abuts against the groove of the corresponding pull tube end can be inserted into the positioning sleeve.

[0014] By adopting the above technical solution, due to the presence of the positioning sleeve and the positioning pin, and the fact that the positioning pin can be inserted into the groove at one end of the stem-pulling roller, the phenomenon of changes in the relative position between the stem-pulling tube and the multiple serrated stem-pulling plates and multiple stem-pulling plates to be connected is reduced during the process of the positioner driving the rotating frame and the stem-pulling tube on the rotating frame to rotate.

[0015] Optionally, each processing port has multiple connecting plates slidably connected along the length of the processing port. Each set of clamping components includes a clamping base fixedly connected to each connecting plate. Multiple clamping plates are rotatably connected to each clamping base. The multiple clamping plates connected to the same clamping base can form a ring. Each clamping plate has a groove for placing the stem-pulling tube, the serrated stem-pulling plate, and the stem-pulling plate. A clamping support that can slide synchronously with the connecting plate is connected to the bottom plate on one side of each connecting plate. A clamping cover plate that can restrict the relative position of the clamping plate and the connected clamping base is rotatably connected to each clamping support.

[0016] By adopting the above technical solution, when it is necessary to splice multiple serrated stem-pulling plates and multiple stem-pulling plates with stem-pulling tubes, and to fix the relative positions of multiple serrated stem-pulling plates and multiple stem-pulling plates with stem-pulling tubes, multiple serrated stem-pulling plates and multiple stem-pulling plates connected to the same stem-pulling tube are alternately inserted into the grooves opened in multiple pressing plates connected to the same pressing support. The stem-pulling tube is placed in the middle of the multiple pressing plates. Then, the multiple pressing plates are spliced ​​into a ring and connected to the pressing base. Then, the pressing cover plate is placed on the upper side of the ring-shaped pressing plates, thereby restricting the position of the multiple pressing plates in the ring. In this way, the multiple pressing plates in the ring can restrict the position of the stem-pulling tube and the multiple serrated stem-pulling plates and multiple stem-pulling plates to be connected.

[0017] Optionally, a drive motor is fixedly connected to the base plate, and a drive screw is fixedly connected to the drive motor. The drive screw can drive multiple clamping supports to move.

[0018] By adopting the above technical solution, the presence of the drive motor allows the drive screw to rotate during the welding process. The rotation of the drive screw moves the clamping support. Since the clamping support is connected to the connecting plate, the rotation of the drive screw can move the clamping support, the connecting plate, and multiple clamping plates. This ensures that the welding machine can fully weld the connection between the stem-pulling tube and multiple serrated stem-pulling plates, thereby reducing the occurrence of insufficient welding at the connection between the serrated stem-pulling plates or the stem-pulling plates and the stem-pulling tube, which affects the subsequent use of the stem-pulling roller.

[0019] Optionally, a locking element capable of fixing the relative position of the two adjacent pressing plates is connected between them.

[0020] By adopting the above technical solution, the presence of the locking component reduces the occurrence of situations where, when the position of the clamping plates forming a ring restricts the position between the stem tube and multiple serrated stem plates and multiple stem plates, the connection between the clamping plates is loose, resulting in multiple serrated stem plates and multiple stem plates failing to abut against the stem tube.

[0021] Optionally, each of the clamping cylinders is provided with a clamping ring on the side near the pull tube, which can be placed in the middle of the pull tube. Multiple clamping rods are slidably inserted inside the clamping ring. Each clamping rod has a clamping spring inserted inside on the side near the center of the clamping ring. One end of each clamping spring passes through the side wall of the clamping rod and is connected to a telescopic rod. Each clamping cylinder is fixedly connected to an abutting block on the side near the clamping ring, which can be inserted into the middle of the clamping ring and abut against the telescopic rod.

[0022] By adopting the above technical solution, when one end of the pull tube is placed near the side of the tightening cylinder, the pressure ring is placed inside the pull tube end. After the tightening cylinder is activated, the tightening cylinder drives the abutment block to insert into the pressure ring. Then, the abutment block drives multiple telescopic rods to move towards the connected tightening rod. Then, the tightening rod located at the groove at the end of the pull tube is inserted into the groove at the end of the pull tube. The remaining tightening rod abuts against the inner wall of the end of the pull tube, thereby realizing the limiting operation of the end of the pull tube. At the same time, it also reduces the occurrence of welding position displacement caused by the rotation of the pull tube during the welding process of the pull tube to the serrated pull tube plate or pull tube plate.

[0023] Optionally, each of the top pressure rings is fitted with an external toothed ring on its outer side, and each of the top pressure rings and the external toothed rings is connected by a top clamping plate on one side that can abut against the end of the pull stem tube. Each of the external toothed rings is fitted with a top clamping support that is fixedly connected to the bottom plate.

[0024] By adopting the above technical solution, due to the presence of the external gear ring and the top clamping plate, after the pull tube is sleeved on the outside of the top pressure ring, the end side wall of the pull tube can abut against the top pressure plate and be located inside the external gear ring, thereby achieving the restriction of the axial position of the end of the pull tube by the top pressure plate.

[0025] Optionally, one end of the drive screw is fixedly connected to a drive gear, and the drive gear meshes with a drive rack that is slidably connected to the base plate. The drive rack can simultaneously mesh with multiple external gear rings.

[0026] By adopting the above technical solution, due to the presence of the drive rack and drive gear, the drive motor drives the drive screw to rotate. During the rotation of the drive screw, multiple pressing plates move along the length of the stem-pulling tube, while the drive rack moves. This allows the outer gear ring at the end of the stem-pulling tube to rotate while simultaneously rotating the stem-pulling tube. This reduces the occurrence of insufficient welding between the stem-pulling tube and the serrated stem-pulling plate, which would otherwise affect the later use of the stem-pulling roller.

[0027] In summary, this application includes at least one of the following beneficial technical effects: The first positioning plate, the second positioning plate, and the positioning base restrict the relative positions of multiple serrated stem-pulling plates and multiple stem-pulling plates and stem-pulling tubes. The position of the stem-pulling tube is restricted by the limiting plate and the top clamping plate. Then, the positioner drives the stem-pulling tube and multiple serrated stem-pulling plates and multiple stem-pulling plates to rotate, thereby realizing the welding of the stem-pulling tube and multiple serrated stem-pulling plates and multiple stem-pulling plates, thus reducing the workload of the workers during the welding of the stem-pulling roller. By using multiple clamping plates to restrict the position of the pull tube and the multiple serrated pull tubes and multiple pull tubes to be connected, and by using a drive motor to drive the drive screw to rotate, the drive screw can drive the multiple clamping plates to move along the length of the pull tube, thereby reducing the occurrence of insufficient welding between the pull tube and the multiple serrated pull tubes and multiple pull tubes to be connected; By setting up a top pressure ring, a top pressure plate, and an outer gear ring, and by driving a drive rack that moves via a drive screw, the stem-pulling tube can be rotated during the movement of multiple pressing plates. Furthermore, multiple serrated stem-pulling plates and multiple stem-pulling plates connected to the stem-pulling tube can rotate synchronously with the stem-pulling tube, thereby facilitating the welding process between the stem-pulling tube and the multiple serrated stem-pulling plates and multiple stem-pulling plates that need to be connected. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0029] Figure 2 This is a cross-sectional view of the clamping assembly in Embodiment 1 of this application.

[0030] Figure 3 This is a schematic diagram showing the connection relationship between the positioning sleeve and the positioning pin in Embodiment 1 of this application.

[0031] Figure 4 This is a schematic diagram showing the connection relationship between one of the positioners and the base plate in Embodiment 2 of this application.

[0032] Figure 5 This is a cross-sectional view highlighting the clamping assembly of Embodiment 2 of this application.

[0033] Figure 6 This is a cross-sectional view showing the connection relationship between the locking member and the pressing plate in Embodiment 2 of this application.

[0034] Figure 7 This is a cross-sectional view highlighting the connection relationship between the pressure ring and the drive gear in Embodiment 2 of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Rotating frame; 2. Positioner; 3. Base plate; 31. Machining port; 32. Limiting plate; 321. Limiting groove; 33. Connecting plate; 34. Positioning sleeve; 35. Positioning pin; 4. Tightening cylinder; 41. Tightening plate; 42. Insert block; 5. Pressing assembly; 51. Positioning base; 52. First positioning plate; 53. Second positioning plate; 54. Pressing support; 541. Moving block; 55. Pressing plate; 551. First pressure plate; 56. Pressing base; 561. Second slide groove; 57. Pressing splice plate; 571. Slide rail; 5 8. Locking component; 581. Locking rod; 582. Locking block; 583. Insertion groove; 584. Locking block; 585. Pressure spring; 59. Pressing cover plate; 591. Second pressure plate; 592. First slide groove; 6. Rotary pressing cylinder; 61. Fastening plate; 7. Pneumatic valve switch; 8. Drive motor; 81. Drive screw; 82. Drive gear; 83. Drive rack; 9. Top pressure ring; 91. Top tension rod; 92. Top tension spring; 93. Telescopic rod; 94. Abutment block; 95. External gear ring; 96. Top pressure plate; 97. Top tension support. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail.

[0037] This application discloses an automatic welding fixture for corn harvester stalk rollers. Example 1

[0038] Reference Figure 1 The system includes a rotating frame 1 with an opening in the middle. Two opposing sidewalls of the rotating frame 1 are fixedly connected to positioners 2, and both positioners 2 can simultaneously drive the rotating frame 1 to rotate. A base plate 3 is fixedly connected to one side of the rotating frame 1, and the base plate 3 has two rectangular processing openings 31 that penetrate through it, each also penetrating the opening of the rotating frame 1. Each processing opening 31 on the base plate 3 is fixedly connected to a limiting plate 32 in the direction closest to the same positioner 2, and each limiting plate 32 has a limiting groove 321 on the side furthest from the base plate 3 for placing one end of the pulling roller.

[0039] Each processing port 31 has a clamping cylinder 4 on the bottom plate 3 on the side away from the limiting plate 32. The piston rod of the clamping cylinder 4 is set towards the side close to the limiting plate 32, and a clamping plate 41 that can abut against the pulling roller is fixedly connected to the piston cylinder of the clamping cylinder 4.

[0040] Reference Figure 1 and Figure 2 The base plate 3 is also connected to multiple sets of pressing components 5. In this embodiment, the number of pressing components 5 is four sets, and the four sets of pressing components 5 are evenly divided into two groups to press the pull rollers placed at the two processing ports 31. All four sets of pressing components 5 are located in the middle of the two processing ports 31.

[0041] When welding the stem-pulling roller is required, the stem-pulling tube and the multiple serrated stem-pulling plates and multiple stem-pulling plates to be connected are placed at the processing port 31, and one end of the stem-pulling tube is placed in the limiting groove 321 opened on the limiting plate 32, so that the end side wall of the stem-pulling tube is engaged with the limiting plate 32. The clamping cylinder 4 is activated to drive the clamping plate 41 to abut against the other end of the stem-pulling tube. Then, the stem-pulling tube and the multiple serrated stem-pulling plates and stem-pulling plates to be connected are fixed by the clamping assembly 5. Then, the positioner 2 is activated to drive the rotating frame 1 and the stem-pulling roller connected to the rotating frame 1 to rotate, so that the welding process of the stem-pulling roller can be realized by the welding robot arm.

[0042] By cooperating with the clamping component 5, the limiting plate 32 and the top clamping plate 41, the position of the stem-pulling roller can be restricted. Furthermore, by driving the rotating frame 1 and the stem-pulling roller to rotate through the positioner 2, the welding position of the stem-pulling roller can be adjusted, thereby facilitating the welding process of the stem-pulling tube with the multiple serrated stem-pulling plates to be connected and the stem-pulling plates.

[0043] Each processing port 31 is provided with two spaced-apart connecting plates 33, and the end of each connecting plate 33 is fixedly connected to the inner wall of the adjacent processing port 31, and the length direction of each connecting plate 33 is perpendicular to the length direction of the processing port 31.

[0044] Four sets of clamping components 5 are set one-to-one with four connecting plates 33. Each set of clamping components 5 includes a positioning base 51 fixedly connected to the corresponding connecting plate 33. Each positioning base 51 has a first positioning plate 52 and a second positioning plate 53 abutting against it. Each positioning base 51 has a slot on its upper side wall for the first positioning plate 52 and the second positioning plate 53 to engage. The middle position of the first positioning plate 52, the second positioning plate 53 and the positioning base 51 has a slot for the stem-pulling tube to pass through and abut against the side wall of the stem-pulling tube. The inner wall of the slot of each positioning base 51, the first positioning plate 52 and the second positioning plate 53 also has a slot for multiple serrated stem-pulling plates connected to the stem-pulling tube to be inserted into.

[0045] The clamping assembly 5 also includes a clamping support 54 on the base plate 3 located on one side of the connecting plate 33 and in the middle of the two processing ports 31. Each clamping support 54 is rotatably connected to a clamping plate 55, and each clamping plate 55 can rotate toward the side of the corresponding connecting plate 33 and can surround the first positioning plate 52 and the second positioning plate 53 connected to the corresponding connecting plate 33. Each clamping plate 55 is fixedly connected to a first pressure plate 551 at one end away from the connected clamping support 54. A rotary clamping cylinder 6 is fixedly connected to the side of each connecting plate 33 away from the corresponding positioning base 51. A fastening plate 61 is fixedly connected to the piston rod of each rotary clamping cylinder 6. The lower surface of each fastening plate 61 can abut against the upper surface of the adjacent first pressure plate 551.

[0046] Reference Figure 1 The base plate 3 is also equipped with pneumatic valve switches 7 for controlling the opening and closing of four rotary pressing cylinders 6 and two clamping cylinders 4.

[0047] When it is necessary to clamp and limit the pull tube and the multiple serrated pull plates and multiple pull plates to be connected, the pull tube is placed between the two positioning bases 51 at the same processing port 31. Then, the multiple serrated pull plates and multiple pull plates to be connected are evenly and alternately distributed on the side wall of the pull tube. Then, the first positioning plate 52 and the second positioning plate 53 connected to each positioning base 51 are spliced ​​to limit the position of the pull tube and the multiple serrated pull plates and multiple pull plates to be connected. Then, the clamping plate 55 is rotated to clamp and limit the position of the first positioning plate 52 and the second positioning plate 53. The second positioning plate 53 is fitted inside, and the rotary clamping cylinder 6 is opened by the pneumatic valve switch 7. The rotary clamping cylinder 6 drives the fastening plate 61 to rotate and makes the lower surface of the fastening plate 61 abut against the upper surface of the adjacent first pressure plate 551, thereby restricting the position of the clamping plate 55. In turn, the clamping plate 55 restricts the position of the first positioning plate 52, the second positioning plate 53 and the positioning base 51, and restricts the position of the stem-pulling tube and the multiple serrated stem-pulling plates and the multiple stem-pulling plates through the first positioning plate 52, the second positioning plate 53 and the positioning base 51.

[0048] Reference Figure 3 Each base plate 3 is fixedly connected to a positioning sleeve 34 on the side of each top clamping plate 41 away from the connected top clamping cylinder 4. Each positioning sleeve 34 is located on the lower side of the end of the pull tube when the pull roller abuts against the top clamping plate 41. Each positioning sleeve 34 is inserted with a positioning pin 35. When the positioning sleeve 34 is located on the lower side of the end of the pull tube, the positioning pin 35 can be inserted into the groove opened at the end of the pull tube while being inserted into the positioning sleeve 34. The end of the positioning pin 35 is threadedly connected to the inner wall of the positioning sleeve 34.

[0049] After one end of the pull tube abuts against the limiting plate 32, the other end of the pull tube is positioned on the upper side of the positioning sleeve 34. Then, the positioning pin 35 is inserted into the positioning sleeve 34, so that the positioning pin 35 abuts against the groove opened at the end of the pull tube, thereby restricting the rotation of the pull tube through the cooperation of the positioning pin 35 and the positioning sleeve 34.

[0050] The implementation principle of Embodiment 1 of this application is as follows: When it is necessary to restrict the position of the pull tube and the multiple serrated pull plates to be connected, the pull tube is placed on two positioning bases 51 at the same processing port 31. Then, the position of the pull tube and the multiple serrated pull plates to be connected is restricted by the first positioning plate 52 and the second positioning plate 53. Then, through the cooperation of the first bearing plate 551 and the fastening plate 61, the position of the pull tube and the multiple serrated pull plates is restricted by the pressing plate 55.

[0051] At the same time, the axial displacement of the pull roller is fully restricted by the cooperation of the clamping cylinder 4 and the limiting plate 32.

[0052] Subsequently, when it is necessary to weld the stem-pulling tube to multiple serrated stem-pulling plates and multiple stem-pulling plates, the two positioners 2 are activated to drive the rotating frame 1 to rotate. During the rotation of the rotating frame 1, the stem-pulling roller is driven to rotate, thereby realizing the welding process of the stem-pulling tube connected to the rotating frame 1 and the multiple serrated stem-pulling plates and multiple stem-pulling plates to be connected by the welding robot arm. Example 2

[0053] Reference Figure 4 and Figure 5 The difference between this embodiment and embodiment 1 is that the end sidewall of each connecting plate 33 is slidably connected to the inner wall of the adjacent processing port 31, and the clamping assembly 5 includes a clamping base 56 fixedly connected to the connecting plate 33. Each clamping base 56 is connected to multiple clamping plates 57. In this embodiment, three clamping plates 57 are connected to each clamping base 56, and the three clamping plates 57 are spliced ​​together in a circular arrangement. A circular slot for the stem-pulling tube to pass through is provided in the middle of the circle formed by the three clamping plates 57, and grooves for placing multiple serrated stem-pulling plates and multiple stem-pulling plates connected to the stem-pulling tube are also provided outwards from the middle of the three clamping plates 57. A locking member 58 is connected between every two clamping plates 57 to connect two adjacent clamping plates 57.

[0054] When it is necessary to connect the stem-pulling plate to multiple serrated stem-pulling plates and multiple stem-pulling rollers, the stem-pulling tube is placed in the middle position of the three clamping plates 57 connected to the same clamping base 56. Then, the relative position of the stem-pulling tube to the multiple serrated stem-pulling plates and multiple stem-pulling plates is restricted by the three clamping plates 57. Then, the two adjacent clamping plates 57 are connected by the locking member 58, thereby realizing the connection and positioning of the stem-pulling tube to the multiple serrated stem-pulling plates and multiple stem-pulling plates through the multiple clamping plates 57.

[0055] Reference Figure 6 The locking component 58 includes a locking rod 581 fixedly connected to the side of each pressing plate 57 near the adjacent pressing plate 57. Each locking rod 581 has a locking block 582 fixedly connected to the end away from the connected pressing plate 57. The cross-section of each locking block 582 is set as a triangle, and the vertical section of the end of each locking block 582 near the locking rod 581 is larger than the vertical section of the connected locking rod 581.

[0056] Each clamping plate 57 has an insertion groove 583 on the side near the locking block 582 connected to the adjacent clamping plate 57, for the adjacent locking rod 581 and locking block 582 to be inserted into. Each insertion groove 583 has a groove in its groove wall, and a locking block 584 is slidably connected inside each groove. Each locking block 584 has a pressure spring 585 fixedly connected on the side near the inner wall of the groove.

[0057] When it is necessary to splice and press the panel 57 and achieve the connection of the panel 57, the locking rod 581 at one end of the pressing panel 57 is inserted into the insertion groove 583 of the adjacent pressing panel 57. Then, after the locking block 582 passes through the locking block 584, under the action of the pressure spring 585, the locking block 584 abuts against the locking rod 581 located in the same insertion groove 583 and the side of the locking block 582 near the locking rod 581. At the same time, the ends of the two adjacent pressing panels 57 are connected to each other, thereby realizing the connection process of the adjacent pressing panels 57 connected to the same pressing base 56.

[0058] Reference Figure 5 Of the four clamping supports 54 connected to the base plate 3 between the two processing ports 31, each pair of adjacent clamping supports 54 connected to different pull rollers has the same moving block 541 fixedly connected to its lower side, and each moving block 541 is slidably connected to the side wall of the base plate 3 located between the two processing ports 31. Each connecting plate 33 is fixedly connected to the adjacent moving block 541 and can move with the moving block 541.

[0059] Each clamping support 54 is rotatably connected to a clamping cover plate 59, and each clamping cover plate 59 can cover the upper side of the three clamping plates 57 connected to the adjacent clamping base 56, thereby strengthening the connection between the three clamping plates 57 connected to the clamping base 56 through the clamping cover plate 59 and the clamping base 56. A second pressure plate 591 is fixedly connected to the end of each clamping cover plate 59 away from the connected clamping support 54, and the upper surface of the second pressure plate 591 can abut against the lower surface of the fastening plate 61.

[0060] After placing the stem-pulling tube and the multiple serrated stem-pulling plates and multiple stem-pulling plates to be connected into the three pressing plates 57, and connecting the three pressing plates 57 to each other, the three pressing plates 57 are connected to the pressing base 56 on the lower side. Then, the pressing cover plate 59 is placed on the upper side of the three connected pressing plates 57, and the rotating pressing cylinder 6 is activated to drive the fastening plate 61 to abut against the second pressure plate 591, thereby realizing the connection process between the stem-pulling roller and the base plate 3.

[0061] Reference Figure 4 and Figure 5 A drive motor 8 is fixedly connected to the middle position of the base plate 3 on the side away from the clamping cylinder 4, and a drive screw 81 is fixedly connected to the output shaft of the drive motor 8. The drive screw 81 passes through two moving blocks 541 in sequence and is threadedly connected to the two moving blocks 541. The drive screw 81 is set to be a bidirectional screw, and the middle position of the bidirectional screw is set at the middle position of the two moving blocks 541.

[0062] When it is necessary to weld the stem-pulling tube to the multiple serrated stem-pulling plates and multiple stem-pulling plates to be connected, after the stem-pulling roller is fixed by multiple clamping plates 57, clamping base 56 and clamping cover plate 59, the drive motor 8 is started. The drive motor 8 drives the drive screw 81 to rotate. During the rotation of the drive screw 81, the two moving blocks 541 move. During the movement of the two moving blocks 541, the connecting plate 33 and the clamping cover plate 59 move, thereby realizing the process of moving multiple clamping plates 57, and thus enabling the full welding process of the stem-pulling tube and the multiple serrated stem-pulling plates and multiple stem-pulling plates connected to the stem-pulling tube.

[0063] Reference Figure 7 Each top-pressing plate 41 is provided with a top-pressing ring 9 on the base plate 3 between adjacent processing ports 31, and each top-pressing ring 9 can be inserted into the side wall of the pull tube near the top-pressing cylinder 4. Multiple top-pressing rods 91 are slidably connected inside each top-pressing ring 9 along the radial direction of the top-pressing ring 9. The multiple top-pressing rods 91 are evenly distributed around the center of the top-pressing ring 9 on the inner wall of the top-pressing ring 9, and each top-pressing rod 91 slides against the inner wall of the top-pressing ring 9.

[0064] Each tensioning rod 91 has a groove at one end near the inner wall of the pressure ring 9, and a tensioning spring 92 is fixedly connected to the inner wall of the tensioning rod 91 within the groove. A telescopic rod 93 is fixedly connected to the end of each tensioning spring 92 away from the inner wall of the groove, and the telescopic rod 93 can be inserted into the groove at one end of the tensioning rod 91. An abutment block 94 is fixedly connected to the end of each tensioning rod 91 away from the tensioning spring 92, and multiple abutment blocks 94 connected to the same pressure ring 9 can be spliced ​​together to form a ring. An insertion block 42 is fixedly connected to the side of each tensioning plate 41 near the pressure ring 9. The insertion block 42 is conical, with the apex of the cone facing the center of the pressure ring 9.

[0065] When it is necessary to fix the end of the pull tube, the tightening cylinder 4 is activated. The tightening cylinder 4 drives the tightening plate 41 to move closer to the pressure ring 9. Then, the tightening plate 41 drives the insertion block 42 to insert into the center of the pressure ring 9 and simultaneously abut against multiple abutting blocks 94 connected to the same pressure ring 9. Then, as the insertion block 42 continues to move, the insertion block 42 drives multiple abutting blocks 94 to move away from the center of the pressure ring 9. During the movement of the abutting blocks 94, the telescopic rod 93 moves closer to the tightening spring 92. The tightening spring 92 pushes the tightening rod 91 away from the center of the pressure ring 9, so that two of the multiple tightening rods 91 can be inserted into the groove opened in the side wall of the end of the pull tube. The remaining tightening rods 91 abut against the inner wall of the pull tube under the action of the abutting blocks 94, thereby restricting the position of the pull tube away from the limit plate 32.

[0066] Reference Figure 4 and Figure 7 Each pressure ring 9 is fitted with an outer toothed ring 95 at intervals on its outer side, and the outer toothed ring 95 is concentric with the inner pressure ring 9. An annular pressure plate 96 is fixedly connected between the outer ring wall of each pressure ring 9 and the side of the tightening plate 41 and the outer toothed ring 95, thus forming a groove for the end of the pull tube to be inserted. The end sidewall of the pull tube can be inserted into the groove and abut against the sidewall of the pressure plate 96, and the tightening plate 41 can abut against the side of the adjacent pressure plate 96 away from the pull tube. A tightening support 97 is fitted on the outer side of the outer toothed ring 95, and the outer toothed ring 95 can rotate within the tightening support 97. The tightening support 97 is fixedly connected to the base plate 3.

[0067] A drive gear 82 is fixedly connected to the end of the drive screw 81 away from the drive motor 8. A drive rack 83 meshes with the lower side of the drive gear 82. The drive rack 83 is perpendicular to the drive screw 81 and slidably connected to the base plate 3. The drive rack 83 passes through the lower side of two clamping supports 97, and each external gear ring 95 can pass through the clamping support 97 and mesh with the lower drive rack 83.

[0068] Reference Figure 5 Each pressing plate 57 has a slide rail 571 fixedly connected to its outer side, and each pressing cover plate 59 has a first slide groove 592 for the slide rail 571 to be inserted and rotated. Each pressing base 56 has a second slide groove 561 for the connected slide rail 571 to be inserted and rotated.

[0069] As the drive screw 81 moves multiple clamping plates 57, the drive screw 81 drives the drive gear 82 to move. During the movement of the drive gear 82, the drive rack 83 slides. During the sliding of the drive rack 83, the two meshing external gear rings 95 rotate. During the rotation of the external gear rings 95, the connected top pressure ring 9 rotates. Since the top pressure ring 9 is connected to the pull stem tube by inserting it into the end groove of the pull stem tube through the top clamping rod 91, and since multiple clamping plates 57 are rotatably connected to the connected clamping base 56 and clamping cover plate 59, the top pressure ring 9 can drive the connected pull stem roller to rotate during the rotation. This allows for the full welding of the pull stem tube to the connected multiple serrated pull stem plates and multiple pull stem plates during the welding process.

[0070] The implementation principle of Embodiment 2 of this application is as follows: the stem tube and the multiple serrated stem plates to be connected are connected by multiple pressing plates 57. The multiple interlocking pressing plates 57 are placed on the pressing base 56, and then the position of the multiple pressing plates 57 and the pressing base 56 is further restricted by the pressing cover plate 59.

[0071] Then, the tightening cylinder 4 is activated to drive the insertion block 42 to be inserted into the middle position inside the pressure ring 9, so that the tightening rod 91 connected to the pressure ring 9 can be inserted into the groove at the end of the pull tube, thereby restricting the position of the pull tube.

[0072] When welding is required, the positioner 2 is started to drive the rotating frame 1 to rotate, and then the drive motor 8 is started. This causes the puller roller to rotate while the multiple pressing plates 57 connected to the puller roller are moved by the drive screw 81. This enables the puller tube to be fully welded to the multiple serrated puller plates and multiple puller plates that need to be connected by the welding machine.

[0073] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic welding fixture for a corn harvester stalk roller, characterized in that: The system includes a rotating frame (1), with a positioner (2) connected to both sides of the rotating frame (1) to drive the rotating frame (1) to rotate. The rotating frame (1) is connected to a base plate (3), and the base plate (3) is provided with multiple processing ports (31) spaced apart. Each processing port (31) is fixedly connected to a limiting plate (32) on the side of the base plate (3) near one of the positioners (2) to place one end of the stem-pulling tube and abut against the end of the stem-pulling tube. Each processing port (31) is provided with a clamping cylinder (4) at the other end to clamp the end of the stem-pulling tube placed at the processing port (31). The base plate (3) is also provided with multiple sets of clamping components (5) near each processing port (31) to clamp the stem-pulling tube at the processing port (31) and the multiple serrated stem-pulling plates and multiple stem-pulling plates to be connected. Multiple positioning plates are fixedly connected to the base plate (3). The pressing assembly (5) includes a positioning base (51) fixedly connected to the positioning plate. A first positioning plate (52) and a second positioning plate (53) are detachably connected to the positioning base (51). Each first positioning plate (52), each second positioning plate (53), and each positioning base (51) are provided with a slot for placing the stem-pulling tube, the serrated stem-pulling plate, and the stem-pulling plate. A pressing plate (55) is rotatably connected to the base plate (3) on one side of each positioning base (51) and can cover the first positioning plate (52) and the second positioning plate (53) to fix the relative position between the first positioning plate (52) and the second positioning plate (53) and the positioning base (51).

2. The automatic welding fixture for the stalk pulling roller of a corn harvester according to claim 1, characterized in that: Each of the pressing plates (55) has a first pressure plate (551) fixedly connected to one end away from the rotation point connected to the base plate (3), and a rotary pressing cylinder (6) is fixedly connected to the base plate (3) on one side of each first pressure plate (551), and a fastening plate (61) capable of pressing the adjacent first pressure plate (551) is fixedly connected to the piston rod of each rotary pressing cylinder (6).

3. An automatic welding fixture for corn harvester stalk rollers according to any one of claims 1-2, characterized in that: A positioning sleeve (34) is fixedly connected to the bottom plate (3) of the pull tube near the tightening cylinder (4), and a positioning pin (35) that abuts against the groove of the corresponding pull tube can be inserted into the positioning sleeve (34).

4. The automatic welding fixture for the stalk pulling roller of a corn harvester according to claim 1, characterized in that: Each processing port (31) is slidably connected with multiple connecting plates (33) along the length of the processing port (31). Each set of pressing components (5) includes a pressing base (56) fixedly connected to each connecting plate (33). Each pressing base (56) is rotatably connected with multiple pressing plates (57). Multiple pressing plates (57) connected to the same pressing base (56) can form a ring. Each pressing plate (57) is provided with a groove for placing the stem tube, the serrated stem tube, and the stem tube. Each connecting plate (3) has a pressing support (54) connected to the bottom plate (3) on one side that can slide synchronously with the connecting plate (33). Each pressing support (54) is rotatably connected with a pressing cover plate (59) that can limit the relative position of the pressing plate (57) and the connected pressing base (56).

5. The automatic welding fixture for the stalk pulling roller of a corn harvester according to claim 4, characterized in that: A drive motor (8) is fixedly connected to the base plate (3), and a drive screw (81) is fixedly connected to the drive motor (8). The drive screw (81) can drive multiple clamping supports (54) to move.

6. The automatic welding fixture for the stalk pulling roller of a corn harvester according to claim 5, characterized in that: A locking element (58) is connected between two adjacent clamping plates (57) to fix the relative position of the two clamping plates (57).

7. An automatic welding fixture for corn harvester stalk rollers according to any one of claims 5 or 6, characterized in that: Each of the clamping cylinders (4) is provided with a clamping ring (9) on the side near the stem tube, which can be placed in the middle of the stem tube. Multiple clamping rods (91) are slidably inserted inside the clamping ring (9). Each clamping rod (91) is provided with a clamping spring (92) on the side near the center of the clamping ring (9). One end of each clamping spring (92) passes through the side wall of the clamping rod (91) and is connected to a telescopic rod (93). Each clamping cylinder (4) is fixedly connected to a stop block (94) on the side near the clamping ring (9), which can be inserted into the middle of the clamping ring (9) and abut against the telescopic rod (93). The stop block (94) can be inserted into the middle of the clamping ring (9).

8. The automatic welding fixture for the stalk pulling roller of a corn harvester according to claim 7, characterized in that: Each of the top pressure rings (9) is fitted with an outer toothed ring (95) on its outer side, and a top clamping plate (41) is provided between each of the top pressure rings (9) and the outer toothed ring (95). An annular top pressure plate (96) is fixedly connected between the outer ring wall of each of the top pressure rings (9) and the outer toothed ring (95). A top clamping support (97) fixedly connected to the bottom plate (3) is fitted on the outer side of each of the outer toothed rings (95).

9. The automatic welding fixture for the stalk pulling roller of a corn harvester according to claim 8, characterized in that: One end of the drive screw (81) is fixedly connected to a drive gear (82), and the drive gear (82) meshes with a drive rack (83) that is slidably connected to the base plate (3). The drive rack (83) can simultaneously mesh with multiple external gear rings (95).

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