A continuous knotting test bench for multiple knotters

Abstract

The invention provides a continuous knotting test bench for multiple knotters, comprising a rope pulling system I, a rope releasing device II, a main shaft transmission system III for a knotter, a motor drive system IV, a control system V, a frame VI and a rope pre-tightening force adjusting device VII; the rope pre-tightening force adjusting device VII is used for clamping the rope and tightening it, the control system V controls the motor drive system IV so that the rope needle of the main shaft transmission system III of the knotter sends the rope to the knotter, the rope pulling system I forms a rope loop to be knotted with the rope, the motor drive system IV drives the main shaft transmission system III of the knotter so that the knotter completes the knotting action, and the rope releasing device II brushes the knotted rope loop off the rope pulling system I; the continuous knotting process of multiple knotters under the condition of grass bale rebound can be simulated, the knotting speed can be controlled by adjusting the rotation speed of the motor drive system, and the continuous knotting of multiple knotters can be automatically realized at the same time, thereby reducing the time consumed in the test process, improving the test efficiency and the knotting quality, and reducing the failure rate.

Description

Technical Field

[0001] The invention belongs to the technical field of bundling, and in particular relates to a continuous knotting test bench with multiple knotters. Background Art

[0002] Nowadays, square hay balers are increasingly used in agriculture. As an important part of square hay balers, the performance of knotters directly determines the operation quality of square hay balers. Although the research on knotters started late in China, many new progresses have been made. It is urgent to conduct relevant performance tests on improved knotters. However, the existing knotter test bench cannot test multiple knotters at the same time, which prolongs the time spent on the test process. In addition, its measurement parameters are limited, the failure rate is high, and it cannot meet the requirements of reliable and continuous knotting tests. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a continuous knotting test bench for multiple knotters, which can simulate the continuous knotting process of multiple knotters under the condition of bale rebound. By adjusting the knotting speed, multiple knotters can be automatically and simultaneously tied in a continuous manner, which reduces the time consumed in the test process and improves the test efficiency. The rope pulling system of the present invention has rapid and accurate movements, reliable rope pulling, and large bearing capacity. At the same time, a synchronous belt module is used to simulate the bale forming process, which has fast movement speed and high efficiency. The rope pre-tightening force adjustment device of the present invention makes the rope feeding reliable and free of dead knots during the test process, and at the same time, the rope can be continuously tightened to improve the knot quality and reduce the failure rate. The tension pressure sensor collects the tension signal once at regular intervals and feeds it back to the control system V to form a tension-time line graph, which can reflect the real-time tension of the rope, thereby helping the tester to determine the current clamping degree of the rope and provide a reference for the wear condition of the knotter to be tested.

[0004] The technical solution of the present invention is: a multi-group knotter continuous knotting test bench, comprising a rope pulling system I, a rope releasing device II, a knotter main shaft transmission system III, a motor drive system IV, a control system V, a frame VI and a rope pre-tightening force adjustment device VII; the rope pulling system I, the rope releasing device II, the knotter main shaft transmission system III, the motor drive system IV and the rope pre-tightening force adjustment device VII are respectively installed on the frame VI; the rope pre-tightening force adjustment device VII is arranged at the bottom of the frame VI, and the rope pre-tightening force adjustment device VII includes a guide rope plate, a rope clamping mechanism and a rope pulling mechanism; one end of the tying rope passes through the rope guide plate, the rope clamping mechanism and the rope pulling mechanism in sequence; the rope pulling system I is located above the rope preload adjustment device Ⅶ, and the rope releasing device II is located above the rope pulling system I; the knotter main shaft transmission system III is located on the top of the frame Ⅵ, and the knotter main shaft transmission system III can be installed with multiple sets of knotters; the motor drive system IV is connected to the knotter main shaft transmission system III; the control system V is respectively connected to the rope pulling system I, the knotter main shaft transmission system III and the motor drive system IV.

[0005] In the above scheme, the rope pre-tightening force adjustment device Ⅶ is used to clamp the rope and tighten it, the control system V controls the motor drive system IV so that the rope needle of the knotter main shaft transmission system III sends the rope to the knotter, the rope pulling system I forms the rope into a rope loop to be knotted, the motor drive system IV drives the knotter main shaft transmission system III so that the knotter completes the knotting action, and the rope removing device II brushes the knotted rope loop off the rope pulling system I.

[0006] In the above scheme, the rope system I includes a first driving mechanism, a second driving mechanism, a synchronous belt slide module, a limiting mechanism, a slide rail connecting plate, a linear guide slider system A, a plate support, a linear guide slider system B, a support vertical plate, a guide slider bending plate, a screw fork, a rope bending plate and a rope pin; the limiting mechanism is installed at both ends of the synchronous belt slide module to monitor the extreme position of the slide of the synchronous belt slide module; the first driving mechanism is connected to the synchronous belt slide module, the slide part of the synchronous belt slide module is connected to the bottom of the slide rail connecting plate, and the guide rail part of the linear guide slider system A is connected to the slide The table guide rail is connected to the guide rail on the flat plate, the slide part of the linear guide slider system A is connected to the flat plate support, the support upright plate is installed on the flat plate support, the second drive mechanism is connected to the support upright plate, the guide part of the linear guide slider system B is connected to the support upright plate, one side of the guide slider bending plate is connected to the slide part of the linear guide slider system B; a screw guard plate is provided on the other side of the guide slider bending plate, one end of the screw fork is connected to the guide slider bending plate, and the other end is provided with a U-shaped notch to cooperate with the narrow groove of the protruding end of the transmission screw of the second drive mechanism; the pull rope pin is installed on the pull rope bending plate.

[0007] In the above scheme, the rope pulling system I also includes a tension pressure sensor; the tension pressure sensor is arranged between the guide rail slider bending plate and the rope pulling bending plate, and is used to measure the tension of the rope and transmit it to the control system V.

[0008] Furthermore, the tension pressure sensor is installed on the bending plate of the guide rail slider through an anti-deflection stop gasket.

[0009] In the above scheme, the pull rope system I also includes a tension spring baffle and a tension spring; one end of the tension spring is connected to the flat plate support through a bolt, and the other end is installed on the slide rail connecting plate. The tension spring baffle is installed on the slide rail connecting plate and cooperates with the bolts to limit the position of the flat plate support.

[0010] In the above scheme, the de-rope device II includes a brush mounting plate and a de-rope brush; the de-rope brush is mounted on the brush mounting plate, and the brush mounting plate is mounted on the frame.

[0011] In the above scheme, the knotter main shaft transmission system III includes an encoder, a coupling, a first bearing seat, multiple sets of knotters, a knotter main shaft, a rope-pulling cam plate, a second bearing seat, an insert clutch, a rope needle drive crank, a command connecting rod, a command tripod plate A, a command tripod plate B, an internal gear, a cylindrical gear, a stopper A, a stopper B, an adjustment slider, a third drive mechanism, a rope feeding connecting rod, a three-way rope needle rack, and a rope needle; multiple sets of knotters are arranged on the main shaft of the knotter, and both ends of the knotter pass through the main shaft of the knotter, and both ends of the main shaft of the knotter are respectively installed on the first bearing seat and the second bearing seat, and the main shaft of the knotter One end of the knotter is connected to an encoder through a coupling, and the encoder is used to collect the rotation angle of the knotter main shaft and transmit it to the control system V; the other end of the knotter main shaft is connected to the rope-pulling cam plate, the driven sprocket, the block clutch, and the rope needle driving crank in sequence, and the driven sprocket is integrated with the clutch outer ring of the block clutch, the command connecting rod is respectively hinged to the command tripod plate A and the command tripod plate B, and the two ends of the internal gear are respectively hinged to the command tripod plate A and the command tripod plate B, and the third driving mechanism is installed on the profile frame, and the rope needle driving crank, the rope feeding connecting rod, and the three rope needle racks are hinged in sequence.

[0012] The above scheme also includes an image acquisition system, which is used to collect on-site images of the knotting mouth action and transmit them to the control system V.

[0013] In the above scheme, the rope clamping mechanism includes a transition rope guide plate vertical plate, a transition rope guide plate bottom plate, a rope clamping limit rod, a rope clamping tube, a rope clamping tube supporting vertical plate, a rope clamping pressure plate, a first flange linear bearing, a rope clamping optical axis, a first compression spring, a butterfly nut, a rope clamping guide base and a rope clamping bottom plate; the rope guide plate is installed on the profile frame, the transition rope guide plate vertical plate is installed on the transition rope guide plate bottom plate, a group of rope clamping tubes are respectively installed on the rope clamping pressure plate and the rope clamping bottom plate through the rope clamping tube supporting vertical plate, and the two ends of the rope clamping pressure plate The first ends are respectively provided with first flange linear bearings, the first compression spring is sleeved on one end of the rope clamping optical axis, and the other end of the rope clamping optical axis passes through the first flange linear bearing and is connected to the rope clamping base plate; one end of the rope clamping optical axis is provided with a butterfly nut for adjusting the compression degree of the first compression spring; the rope clamping guide base is connected to the upper part of the rope clamping base plate and is located above the rope clamping tube, and a pair of rope clamping limit rods are also provided on the rope clamping base plate, the rope clamping limit rods are located below the rope clamping tube, and the triangular reinforcement plate is installed at the bending part of the rope clamping base plate.

[0014] In the above scheme, the rope pulling mechanism includes a nylon pulley, a flange linear bearing mounting plate, a second flange linear bearing, a rope pulling optical axis, a second compression spring, a rope pulling base plate and a rope pulling mounting plate; one end of the rope pulling optical axis is provided with a second compression spring, and the other end is connected to the rope pulling base plate through a second flange linear bearing, the rope pulling base plate is installed on the rope pulling mounting plate, the second flange linear bearing is installed on the flange bearing mounting plate, and the nylon pulley is installed between the two flange bearing mounting plates; a butterfly nut is provided at one end of the rope pulling optical axis for adjusting the compression degree of the second compression spring.

[0015] The synchronous belt slide module in the rope pulling system I drives the rope pulling device connected to its slide to move from the initial position to the extended position. After the transmission screw drives the rope pulling pin to extend outward for a certain distance, the synchronous belt slide module drives the rope pulling device to retract from the extended position to the initial position. During this period, the rope pulling pin pulls the rope, and the rear rope needle feeds the rope to prepare for knotting. The compressed length of the second compression spring of the rope preload adjustment device Ⅶ is shortened. After the rope needle reaches the specified position, the knotter ties a knot. After the knotting is completed, the rope needle returns to its starting position. At the same time, the second compression spring of the rope preload adjustment device Ⅶ is extended to tighten the rope, and the transmission screw drives the relevant components to retract to their initial positions. During this period, the rope stripping brush in the rope stripping device II sweeps the knot to the rope receiving tray, and the test enters the next cycle.

[0016] Rope clamp mechanism Rope clamp mechanism Rope pulling mechanism Rope clamp mechanism Rope pulling mechanism Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can simulate the continuous knotting process of multiple groups of knotters under the condition of bale rebound, and the knotting speed can be controlled by adjusting the rotation speed of the motor drive system IV, and multiple groups of knotters can be automatically knotted simultaneously and continuously, which reduces the time consumed in the test process and improves the test efficiency. The rope pulling system of the present invention moves quickly and accurately, the rope pulling is reliable, and the bearing capacity is large. At the same time, the synchronous belt module is used to simulate the bale forming process, and the movement speed is fast and the efficiency is high. The rope preload adjustment device of the present invention ensures that the rope is fed reliably without dead knots during the test process, and at the same time, the rope can be continuously tightened, the knot quality is improved, and the failure rate is reduced. The tension pressure sensor of the present invention collects the tension signal once every period of time, and feeds it back to the control system V to form a tension-time line graph, which can reflect the real-time tension of the rope, thereby helping the tester to determine the current clamping degree of the rope and provide a reference for the wear of the knotter to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0018] Figure 1 It is a structural schematic diagram of the continuous knotting test bench of multiple knotters according to one embodiment of the present invention;

[0019] Figure 2It is a right side view of the continuous knotting test bench of multiple knotters according to one embodiment of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the left part of the pull rope system according to one embodiment of the present invention;

[0021] Figure 4 It is a structural schematic diagram of a rope clamping mechanism of a rope pre-tightening force adjusting device according to an embodiment of the present invention;

[0022] Figure 5 It is a structural schematic diagram of a rope pulling mechanism of a rope pre-tightening force adjusting device according to one embodiment of the present invention;

[0023] Figure 6 A schematic diagram of an initial phase of a knotter according to an embodiment of the present invention;

[0024] Figure 7 It is a schematic diagram of the pull rope pin shaft being retracted according to one embodiment of the present invention;

[0025] Figure 8 A schematic diagram of a rope to be pulled in a rope pulling system according to an embodiment of the present invention;

[0026] Fig. 9 It is a schematic diagram of the extension of the pull rope pin shaft according to one embodiment of the present invention;

[0027] Fig.10 A schematic diagram of a rope pulling system according to an embodiment of the present invention with a rope pulled and ready to be knotted;

[0028] Fig.11 A schematic diagram of a rope loop about to be formed according to an embodiment of the present invention;

[0029] Fig.12 This is a schematic diagram of a knotter according to one embodiment of the present invention that is about to complete knotting.

[0030] In the figure, Ⅰ. Rope pulling system; Ⅱ. Rope release device; Ⅲ. Knotter spindle transmission system; Ⅳ. Motor drive system; Ⅴ. Control system; Ⅵ. Frame; Ⅶ. Rope preload adjustment device; 1. Stepper motor; 2. Right angle reducer; 3. Right angle reducer mounting seat; 4. Synchronous belt slide module; 5. Slot type photoelectric switch A; 6. Slot type photoelectric switch B; 7. Module support; 8. Slide rail connecting plate; 9. Tension spring baffle; 10. Tension spring; 11. Linear guide slider system A; 12. Plate support; 13. Linear guide slider system B; 14. Support plate; 15. Through-type stepper motor; 16. Transmission screw; 17. Wire Bar guard; 18. Pad; 19. Guide rail slider bending plate; 20. Screw fork A; 21. Screw fork B; 22. Anti-deflection stop gasket; 23. S-type tension pressure sensor; 24. Draw rope bending plate; 25. Draw rope pin; 26. Drag chain mounting plate; 27. Brush mounting plate; 28. Rope removal brush; 30. Encoder; 31. Coupling; 32. First bearing seat; 33. Knotter; 34. Knotter spindle; 35. Rope cam plate; 36. Second bearing seat; 37. Block clutch; 38. Rope needle drive crank; 39. Command connecting rod; 40. Command tripod plate A; 41. Command tripod plate B; 42. Internal gear Wheel; 43. Cylindrical gear; 44. Stopper A; 45. Stopper B; 46. Adjustment slider; 47. Planetary reducer; 48. DC servo motor; 49. Servo motor mounting bracket; 50. Rope feeding connecting rod; 51. Three-way rope needle rack; 52. Rope needle; 53. Frequency conversion reduction motor; 54. Driving sprocket; 55. Driven sprocket; 56. Image acquisition system; 57. Rope bundle; 58. Rope bundle; 59. Rope guide plate; 60. Transition rope guide plate vertical plate; 61. Transition rope guide plate bottom plate; 62. Rope clamping limit rod; 63. Rope clamping tube; 64. Rope clamping tube supporting vertical plate; 65. Rope clamping plate; 66. First flange linear bearing; 67. Rope clamping optical axis; 68. First compression spring; 69. Nut; 70. Rope clamping guide base; 71. Rope clamping bottom plate; 72. Triangular reinforcement plate; 73. Nylon pulley; 74. Flange type linear bearing mounting plate; 75. Second flange type linear bearing; 76. Rope pulling optical axis; 77. Second compression spring; 78. Rope pulling bottom plate; 79. Rope pulling mounting plate; 80. Profile frame; 81. Universal wheel; 82. Three-rope right vertical plate; 83. Three-rope left vertical plate; 84. Compression chamber bottom plate; 85. Knotter main bracket bottom plate; 86. Knotter bracket right side plate; 87. Knotter bracket left side plate; 88. Frequency conversion motor mounting plate; 89. Rope receiving tray. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Figure 1 and 2 The figure shows a preferred embodiment of the continuous knotting test bench for multiple knotters of the present invention, wherein the continuous knotting test bench for multiple knotters includes a rope pulling system I, a rope releasing device II, a knotter main shaft transmission system III, a motor drive system IV, a control system V, a frame VI and a rope pre-tensioning force adjustment device VII.

[0035] The rope-pulling system I, the rope-releasing device II, the knotter main shaft transmission system III, the motor drive system IV and the rope preload adjustment device VII are respectively installed on the frame VI; the rope preload adjustment device VII is arranged at the bottom of the frame VI, and the rope preload adjustment device VII comprises a rope guide plate 59, a rope clamping mechanism and a rope-pulling mechanism; one end of the rope 58 passes through the rope guide plate 59, the rope clamping mechanism and the rope-pulling mechanism in sequence; the rope-pulling system I is located above the rope preload adjustment device VII, and the rope-releasing device II is located above the rope-pulling system I; the knotter main shaft transmission system III is located at the top of the frame VI, and the knotter main shaft transmission system III can be equipped with multiple sets of knotters 33; the motor drive system IV is connected to the knotter main shaft transmission system III; the control system V is respectively connected to the rope-pulling system I, the knotter main shaft transmission system III and the motor drive system IV.

[0036] The rope pre-tightening force adjustment device Ⅶ is used to clamp the rope 58 and tighten it, the control system V controls the motor drive system IV so that the rope needle 52 of the knotter main shaft transmission system III sends the rope 58 to the knotter 33, the rope pulling system I forms the rope 58 into a rope loop to be knotted, the motor drive system IV drives the knotter main shaft transmission system III so that the knotter 33 completes the knotting action, and the rope removing device II brushes the knotted rope loop off the rope pulling system I.

[0037] like Figure 3 As shown, the rope pulling system I includes a rope pulling device, a first driving mechanism, a second driving mechanism, a limiting mechanism, a slide rail connecting plate 8, a linear guide slider system A11, and a plate support 12; the rope pulling device includes a linear guide slider system B13, a support vertical plate 14, a guide slider bending plate 19, a screw fork, a rope bending plate 24 and a rope pulling pin 25; the limiting mechanism is installed at both ends of the synchronous belt slide module 4 to monitor the extreme position of the slide of the synchronous belt slide module 4; the first driving mechanism is connected to the synchronous belt slide module 4, the slide part of the synchronous belt slide module 4 is connected to the bottom of the slide rail connecting plate 8, and the guide rail part of the linear guide slider system A11 is connected to the slide rail connecting plate 8. The guide rail on the connecting plate 8 is connected, the slide part of the linear guide slider system A11 is connected to the flat plate support 12, the support upright plate 14 is installed on the flat plate support 12, the second drive mechanism is connected to the support upright plate 14, the guide rail part of the linear guide slider system B13 is connected to the support upright plate 14, one side of the guide slider bending plate 19 is connected to the slide part of the linear guide slider system B13, and the other side of the guide slider bending plate 19 is provided with a screw guard plate 17; one end of the screw fork is connected to the guide slider bending plate 19, and the other end is provided with a U-shaped notch and cooperates with a narrow groove on the protruding end of the transmission screw 16 of the second drive mechanism; the pull rope pin shaft 25 is installed on the pull rope bending plate 24.

[0038] According to this embodiment, preferably, the first driving mechanism includes a stepper motor 1, a right angle reducer 2, and a right angle reducer mounting seat 3, the stepper motor 1 is fixedly connected to the right angle reducer 2, the stepper motor 1 is a 110 stepper motor, the right angle reducer 2 is fixedly connected to the right angle reducer mounting seat 3, and the right angle reducer mounting seat 3 is fixedly connected to the synchronous belt slide module 4.

[0039] According to this embodiment, preferably, the second driving mechanism is a through-type stepping motor 15 .

[0040] According to this embodiment, preferably, the limiting mechanism includes a slot-type photoelectric switch A5 and a slot-type photoelectric switch B6, and the slot-type photoelectric switch A5 and the slot-type photoelectric switch B6 are installed on the synchronous belt slide module 4 to monitor the extreme position of the slide of the synchronous belt slide module 4.

[0041] The number of the rope-pulling devices matches the number of the knotters 33. According to this embodiment, preferably, when the number of the knotters 33 is three groups, the number of the rope-pulling devices is also three. Preferably, the number of the synchronous belt slide modules 4 is two, wherein two rope-pulling devices are provided on one synchronous belt slide module 4, and one rope-pulling device is provided on the other synchronous belt slide module 4.

[0042] like Figure 3The synchronous belt slide module 4 shown is provided with two reversely installed rope pulling devices, and the synchronous belt slide module 4 includes a slot-type photoelectric switch A5, a slot-type photoelectric switch B6, a module support 7, a slide rail connecting plate 8, a tension spring baffle 9, a tension spring 10, a linear guide slider system A11, a plate support 12, a linear guide slider system B13, a support vertical plate 14, a through-type stepping motor 15, a transmission screw 16, a screw guard plate 17, a pad 18, a guide slider bending plate 19, a screw fork A20, a screw fork B21, an anti-deflection stop gasket 22, a pull pressure sensor 23, a rope bending plate 24, and a pull Rope pin 25 and drag chain mounting plate 26; the slide portion of the synchronous belt slide module 4 is fixedly connected to the slide guide connecting plate 8 by bolts, the guide rail portion of the linear guide slider system A11 is fixedly connected to the slide guide connecting plate 8, the slide portion of the linear guide slider system A11 is fixedly connected to the plate support 12 by bolts, the support plate 14 is welded to the plate support 12, the through-type stepper motor 15 is fixedly connected to the support plate 14 by bolts, the guide rail portion of the linear guide slider system B13 is fixedly connected to the support plate 14, the The pad 18 and the guide rail slider bending plate 19 are connected to the slide part of the linear guide rail slider system B13 by bolts, the screw guard plate 17 is fixed to the guide rail slider bending plate 19 by bolts, the screw fork A20 is connected to the guide rail slider bending plate 19 by bolts, and the anti-deflection stop gasket 22 is connected to the tension and pressure sensor 23 by bolts. The function of the anti-deflection stop gasket 22 is to prevent the tension and pressure sensor 23 from having a large deflection during the operation of the test bench, thereby affecting the pull rope action. The tension and pressure sensor 23 is installed on the guide rail slider bending plate 19 by bolts. The pulling pressure sensor 23 is connected to the pull rope bending plate 24, and the screw fork B21 is connected to the guide rail slider bending plate 19 by bolts. The protruding end of the transmission screw 16 is provided with a narrow groove to match the U-shaped notch of the screw fork A20 and the screw fork B21. The function of the U-shaped notch of the screw fork A20 and the screw fork B21 is to ensure the extension and retraction action of the transmission screw 16 while eliminating the damage to the transmission screw 16 when the pull rope force is too large. The pull rope pin shaft 25 is installed on the pull rope bending plate 24, and a plastic drag chain is installed on the drag chain mounting plate 26 to facilitate circuit routing.

[0043] In the above scheme, the tension and pressure sensor 23 is used to measure the tension of the rope 58 and transmit it to the control system V. The tension and pressure sensor 23 collects the tension signal every certain period of time and feeds it back to the control system V to form a tension-time line graph reflected on the touch screen of the control system V. The line graph can reflect the real-time tension of the rope, thereby helping the tester to determine the current clamping degree of the rope and provide a reference for the wear condition of the knotter to be tested.

[0044] The movement process of the rope pulling system I can be described as follows: Step 1: The synchronous belt slide module 4 works to move the slide rail connecting plate 8 and related components to the working position, that is, the middle part of the slide of the synchronous belt slide module 4 moves to the position of the slot-type photoelectric switch B6. Step 2: The through-type stepper motor 15 rotates to extend the transmission screw 16 to a specified length, driving the screw fork A20, anti-bias stop gasket 22, pull pressure sensor 23, rope bending plate 24, rope pin 25, etc. installed on the linear guide slider system B13 to move to the extended position. Step 3: The synchronous belt slide module 4 works to move the slide rail connecting plate 8 and related components back to the rope pulling position, that is, the middle part of the slide of the synchronous belt slide module moves to the position of the slot-type photoelectric switch A5, the rope pin 25 continues to contact the rope 58, the rear knotter works, and the rope knot is formed. Step 4: After knotting is completed, the through-type stepper motor 15 rotates in the opposite direction to retract the transmission screw 16, and the rope loop is brushed off by the rope-removing brush 28 and falls onto the rope receiving tray 89, and the test enters the next cycle.

[0045] The de-rope device II comprises a brush mounting plate and a de-rope brush; the de-rope brush is mounted on the brush mounting plate, and the brush mounting plate is mounted on the frame.

[0046] According to the present embodiment, preferably, it comprises a brush mounting plate 27 and a rope-removing brush 28, wherein the brush mounting plate 27 and the rope-removing brush 28 are fixedly connected by bolts.

[0047] like Figure 1 and Figure 2 As shown, the knotter spindle transmission system III includes an encoder 30, a coupling 31, a first bearing seat 32, a knotter 33, a knotter spindle 34, a rope-pulling cam plate 35, a second bearing seat 36, a block clutch 37, a rope needle driving crank 38, a command connecting rod 39, a command tripod plate A40, a command tripod plate B41, an internal gear 42, a cylindrical gear 43, a stopper A44, a stopper B45, an adjusting slider 46, a third driving mechanism, a rope feeding connecting rod 50, a three-way rope needle frame 51, and a rope needle 52;

[0048] Preferably, the third driving mechanism includes a planetary reducer 47 , a DC servo motor 48 and a servo motor mounting bracket 49 .

[0049] The two ends of the knotter 33 are provided with a main shaft 34 that runs through the knotter. The main shaft 34 of the knotter is supported by the first bearing seat 32 and the second bearing seat 36 that are distributed on the right side plate 86 of the knotter bracket and the left side plate 87 of the knotter bracket. One end of the main shaft 34 of the knotter is connected to the encoder 30 through a plum blossom coupling 31, and the other end of the main shaft 34 of the knotter is connected to the rope-pulling cam plate 35, the driven sprocket 55, the block clutch 37, and the rope needle driving crank 38 in sequence. The driven sprocket 55 is connected to the embedded The clutch outer ring of the block clutch 37 is welded as a whole, the command connecting rod 39 is hinged to the command tripod plate A40 and the command tripod plate B41, the two ends of the internal gear 42 are respectively hinged to the command tripod plate A40 and the command tripod plate B41, the planetary reducer 47 and the DC servo motor 48 are installed on the servo motor mounting bracket 49, the servo motor mounting bracket 49 is installed on the profile frame 80, and the rope needle driving crank 38, the rope feeding connecting rod 50, and the three-way rope needle frame 51 are hinged in sequence.

[0050] Preferably, the encoder 30 is a multi-turn absolute encoder 30 , and the coupling 31 is a plum blossom coupling 31 .

[0051] The motor drive system IV includes a variable frequency reduction motor 53, a driving sprocket 54, and a driven sprocket 55. The variable frequency speed regulating motor 53 transmits power to the knotter main shaft transmission system III through chain transmission, and the knotting speed can be controlled by adjusting the input frequency of the variable frequency speed regulating motor 53.

[0052] The control system V is respectively connected to the rope pulling system I, the knotter main shaft transmission system III, the motor drive system IV, the image acquisition system 56, and the encoder 30 for communication. The encoder 30 is used to collect the rotation angle of the knotter main shaft 34 during the operation of the test bench. The tension and pressure sensor 23, preferably an S-type tension and pressure sensor, is used to collect the tension of the rope 58 during the operation of the test bench. The image acquisition system 56 is used to observe and record the on-site image of the knotting mouth action. The electronic control part of the control system V is used to control the action of the rope pulling system I, the rotation of the DC servo motor 48, and the speed of the variable frequency reduction motor 53.

[0053] like Figure 1 , Figure 4 and Figure 5As shown, the rope clamping mechanism of the rope preload force adjustment device Ⅶ includes a transition rope guide plate vertical plate 60, a transition rope guide plate bottom plate 61, a rope clamping limit rod 62, a rope clamping tube 63, a rope clamping tube supporting vertical plate 64, a rope clamping pressure plate 65, a first flange linear bearing 66, a rope clamping optical axis 67, a first compression spring 68, a nut 69, a rope clamping guide base 70 and a rope clamping bottom plate 71; the rope guide plate 59 is installed on the profile frame 80, the transition rope guide plate vertical plate 60 is installed on the transition rope guide plate bottom plate 61, a group of rope clamping tubes 63 are respectively installed on the rope clamping pressure plate 65 and the rope clamping bottom plate 71 through the rope clamping tube supporting vertical plate 64, and the rope clamping mechanism Ⅶ includes a transition rope guide plate vertical plate 60, a transition rope guide plate vertical plate 61 ... A first flange-type linear bearing 66 is respectively provided at both ends of the rope pressure plate 65, the first compression spring 68 is sleeved on one end of the rope clamping optical axis 67, and the other end of the rope clamping optical axis 67 passes through the first flange-type linear bearing 66 and is connected to the rope clamping base plate 71; a nut 69 is provided at one end of the rope clamping optical axis 67 for adjusting the compression degree of the first compression spring 68; the rope clamping guide base 70 is connected to the upper part of the rope clamping base plate 71 and is located above the rope clamping tube 63, and a pair of rope clamping limit rods 62 are also provided on the rope clamping base plate 71, and the rope clamping limit rods 62 are located below the rope clamping tube 63, and the triangular reinforcement plate 72 is installed at the bending part of the rope clamping base plate 71.

[0054] The rope-pulling mechanism of the rope-binding preload adjustment device Ⅶ includes a nylon pulley 73, a flange-type linear bearing mounting plate 74, a second flange-type linear bearing 75, a rope-pulling optical axis 76, a second compression spring 77, a rope-pulling base plate 78 and a rope-pulling mounting plate 79; one end of the rope-pulling optical axis 76 is sleeved with a second compression spring 77, and the other end is connected to the rope-pulling base plate 78 through a second flange-type linear bearing 75, the rope-pulling base plate 78 is mounted on the rope-pulling mounting plate 79, the second flange-type linear bearing 75 is mounted on the flange-type bearing mounting plate 74, and the nylon pulley 73 is mounted between the two flange-type bearing mounting plates 74; one end of the rope-pulling optical axis 76 is provided with a nut 69 for adjusting the compression degree of the second compression spring 77.

[0055] Preferably, the nut 69 is a butterfly nut, and the pre-tightening force of the binding rope 58 is adjusted by a spring and the butterfly nut.

[0056] The working process of the rope preload force adjustment device Ⅶ is as follows: the rope 58 is pulled out from the rope bundle 57, first passes through the rope guide hole of the rope guide plate 59 to eliminate the slipknot caused by the twisting and winding of the rope 58, and the straight rope 58 is changed for the first time through the pin on the welded part composed of the transition rope guide plate vertical plate 60 and the transition rope guide plate bottom plate 61. At this time, the rope 58 is directed vertically upward. The limit rod 62 limits the position of the rope 58 so that the rope clamping tube 63 of the rope clamp mechanism continues to contact the rope. The rope clamp mechanism can adjust the clamping force through the first compression spring 68 and the butterfly nut. The rope 58 changes direction for the second time through the pin installed on the rope clamping guide base 70 and enters the rope pulling mechanism. The rope 58 changes direction for the third time through the nylon roller 73 and enters the rope guide hole at the needle tip of the rope needle 52. The rope pulling mechanism can adjust the rope pulling force through the butterfly nut and the second compression spring 77. During the operation of the test bench, the rope clamping tube 63 of the rope clamping mechanism of the rope preload adjusting device Ⅶ always clamps the rope 58 to simulate the load of the rope 58 during the actual operation of the knotter. The rope pulling mechanism of the rope preload adjusting device Ⅶ keeps the rope taut to ensure the knotting quality while facilitating the rope feeding.

[0057] The frame VI includes a profile frame 80, a universal wheel 81, a three-rope right vertical plate 82, a three-rope left vertical plate 83, a compression chamber bottom plate 84, a knotter main bracket bottom plate 85, a knotter bracket right side plate 86, a knotter bracket left side plate 87, and a variable frequency motor mounting plate 88. The three-rope right vertical plate 82 and the three-rope left vertical plate 83 are respectively fixedly connected to the compression chamber bottom plate 84, the knotter bracket right side plate 86 and the knotter bracket left side plate 87 are respectively fixedly connected to the knotter main bracket bottom plate 88, and the knotter main bracket bottom plate 85 and the compression chamber bottom plate 84 are connected to the profile frame 80 by bolts. The rope pulling system I, the rope releasing device II, the knotter main shaft transmission system III, the motor driving system IV, the image acquisition system 56, and the rope binding pre-tightening force adjustment device VII are all installed on the profile frame 80.

[0058] Preferably, the control logic of the control system V for the rope pulling system is that before starting to work, all mechanisms are in the initial position, that is, the block clutch 37 in the knotter spindle transmission system III is in a disengaged state, and the knotter 33 is in the initial working phase, such as Figure 6 and the synchronous belt slide module 4 is fixed to the slide rope device is located at the module stepper motor drive end, the rope pull pin 25 in the rope pull device is in the retracted state, such as Figure 7 As shown; press the start button to enter the working state, the two synchronous belt slide modules 4 act at the same time, driving the rope pulling device connected thereto to move toward the knotter 33, and after the slides of the two synchronous belt slide modules 4 move to the slot-type photoelectric switch B6, that is, the end point proximity switch, the synchronous belt slide module 4 stops moving, such as Figure 8As shown, at the same time, the through-type stepping motor 15 in the rope pulling device starts to move, and the transmission screw 16 drives the rope pulling pin 25 to extend outward by a certain distance, as shown in FIG. Fig. 9 As shown; after the rope pin 25 extends outward, the two synchronous belt slide modules 4 perform a return action, driving the rope pull device connected thereto to move in the initial direction, and after the slides of the two synchronous belt slide modules 4 move to the slot-type photoelectric switch A5, i.e., the starting point proximity switch, the synchronous belt slide module 4 stops moving, such as Fig.10 As shown; after the DC servo motor 48 controls the block clutch 37 in the main shaft transmission system III of the knotter to engage, the rope needle 52 swings up to send the rope to the knotter. At this time, the semi-closed rope loop to be knotted is formed, and at the same time, the cam part of the block clutch 37 contacts the small roller on the command link 39, causing the command tripod plate A40, the command tripod plate B41, the internal gear 42, and the adjusting slider 46 to fall until the adjusting slider 46 is blocked by the stopper A44 and the stopper B45, as shown in FIG. Fig.11 After the knotter 33 starts to perform the knotting action, as shown Fig.12 As shown; after knotting is completed, the knotter 33 returns to the initial working phase, and the multi-turn absolute encoder 30 sends a knotting completion signal, which controls the through-type stepping motor 15 in the rope-pulling device to start moving, driving the rope-pulling pin 25 to be retracted inward to the initial position, so that the rope loop thereon is brushed off by the rope-removing brush 28 and falls into the rope receiving tray 89 placed on the ground. At this point, a knotting test cycle is completed. After the rope-pulling pin 25 is retracted inward to the initial position, the PLC receives the single-cycle end signal and controls each mechanism to perform the periodic action as described above again, and this cycle is repeated.

[0059] The continuous knotting test bench for multiple knotters of the present invention can simulate the continuous knotting process of multiple knotters under the condition of bale rebound. The knotting speed can be controlled by adjusting the rotation speed of the servo motor of the third drive mechanism in the frequency conversion motor in the motor drive system and the knotter main shaft transmission system III, so that multiple knotters can be automatically and simultaneously knotted continuously, reducing the time consumed in the test process and improving the test efficiency. The rope pulling system of the present invention has rapid and accurate action, reliable rope pulling, and large bearing capacity. At the same time, a synchronous belt module is used to simulate the bale forming process, with fast movement speed and high efficiency. The rope pre-tightening force adjustment device of the present invention makes the rope feeding reliable and free of dead knots during the test process, and at the same time, the rope can be continuously tightened, thereby improving the quality of the knot and reducing the failure rate. The tension pressure sensor collects the tension signal once at regular intervals and feeds it back to the control system V to form a tension-time broken line graph, which can reflect the real-time tension of the rope, thereby helping the tester to determine the current clamping degree of the rope and providing a reference for the wear condition of the knotter to be tested.

[0060] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A continuous knotting test bench for multiple knotters, characterized in that: It includes a rope pulling system (Ⅰ), a rope releasing device (Ⅱ), a knotter main shaft transmission system (Ⅲ), a motor driving system (Ⅳ), a control system (Ⅴ), a frame (Ⅵ) and a rope pre-tightening force adjusting device (Ⅶ); The rope pulling system (I), the rope releasing device (II), the knotter main shaft transmission system (III), the motor drive system (IV) and the rope pre-tensioning force adjusting device (VII) are respectively installed on the frame (VI); the rope pre-tensioning force adjusting device (VII) is arranged at the bottom of the frame (VI), and the rope pre-tensioning force adjusting device (VII) comprises a rope guide plate (59), a rope clamping mechanism and a rope pulling mechanism; the rope pre-tensioning force adjusting device (VII) is used to clamp the rope (58) and tighten it, the control system (V) controls the motor drive system (IV) so that the rope needle (52) of the knotter main shaft transmission system (III) sends the rope (58) to the knotter (33), the rope pulling system (I) forms the rope (58) into a rope loop to be knotted, and the motor drive system (IV) drives the rope to be tied. The main shaft transmission system (III) of the automatic knotter enables the knotter (33) to complete the knotting action, and the rope release device (II) brushes the knotted rope loop off the rope pulling system (I); one end of the rope (58) passes through the rope guide plate (59), the rope clamping mechanism and the rope pulling mechanism in sequence; the rope pulling system (I) is located above the rope preload adjustment device (VII), and the rope release device (II) is located above the rope pulling system (I); the rope pulling system (I) includes a first driving mechanism, a second driving mechanism, a synchronous belt slide module (4), a limit mechanism, a slide rail connecting plate (8), a linear guide slider system A (11), a plate support (12), a linear guide slider system B (13), a support vertical plate (14), a guide slider bending plate ( 19), a screw fork, a rope bending plate (24) and a rope pin (25); the limit mechanism is installed at both ends of the synchronous belt slide module (4) to monitor the extreme position of the slide of the synchronous belt slide module (4); the first drive mechanism is connected to the synchronous belt slide module (4), the slide part of the synchronous belt slide module (4) is connected to the bottom of the slide guide connecting plate (8), the guide rail part of the linear guide slider system A (11) is connected to the guide rail on the slide guide connecting plate (8), the slide part of the linear guide slider system A (11) is connected to the plate support (12), the support stand (14) is installed on the plate support (12), and the second drive mechanism is connected to the support The guide rail portion of the linear guide slider system B (13) is connected to the support plate (14), and one side of the guide slider bending plate (19) is connected to the slide portion of the linear guide slider system B (13); one end of the lead screw fork is connected to the guide slider bending plate (19), and the other end is provided with a U-shaped notch to cooperate with the narrow groove provided at the protruding end of the transmission lead screw (16) of the second drive mechanism; the pull rope pin shaft (25) is installed on the pull rope bending plate (24); the knotter spindle transmission system (III) is located at the top of the frame (VI), and the knotter spindle transmission system (III) can be installed with multiple sets of knotters (33); the motor drive system (IV) is connected to the knotter spindle transmission system (III);The control system (V) is connected to the rope pulling system (I), the knotter main shaft transmission system (III) and the motor driving system (IV) respectively. ; 2. The continuous knotting test bench for multiple knotters according to claim 1, characterized in that: The rope pulling system (I) further comprises a pulling pressure sensor (23); The tension pressure sensor (23) is arranged between the guide rail slider bending plate (19) and the pull rope bending plate (24) and is used to measure the tension of the binding rope (58) and transmit it to the control system V.

3. The continuous knotting test bench for multiple knotters according to claim 1, characterized in that: The pull rope system (I) further comprises a tension spring baffle (9) and a tension spring (10); One end of the tension spring (10) is connected to the flat plate support (12) via a bolt, and the other end is mounted on the slide rail connecting plate (8). The tension spring baffle (9) is mounted on the slide rail connecting plate (8) and cooperates with the bolt to limit the position of the flat plate support (12).

4. The continuous knotting test bench for multiple knotters according to claim 1, characterized in that: The de-rope device II comprises a brush mounting plate and a de-rope brush; the de-rope brush is mounted on the brush mounting plate, and the brush mounting plate is mounted on the frame.

5. The continuous knotting test bench for multiple knotters according to claim 1, characterized in that: The knotter main shaft transmission system III comprises an encoder (30), a coupling (31), a first bearing seat (32), a plurality of knotters (33), a knotter main shaft (34), a rope-pulling cam plate (35), a second bearing seat (36), a block clutch (37), a rope needle driving crank (38), a command connecting rod (39), a command tripod plate A (40), a command tripod plate B (41), an internal gear (42), a cylindrical gear (43), a stopper A (44), a stopper B (45), an adjusting slide block (46), a third driving mechanism, a rope feeding connecting rod (50), a three-way rope needle frame (51), and a rope needle (52); A plurality of knotters (33) are arranged on the main shaft (34) of the knotter. Both ends of the knotters (33) pass through the main shaft (34) of the knotter. Both ends of the main shaft (34) of the knotter are respectively mounted on a first bearing seat (32) and a second bearing seat (36). One end of the main shaft (34) of the knotter is connected to an encoder (30) via a coupling (31). The encoder (30) is used to collect the rotation angle of the main shaft (34) of the knotter and transmit it to a control system V. The other end of the main shaft (34) of the knotter is connected to a rope-pulling cam plate (35), a driven sprocket (5 5), the block clutch (37) and the rope needle driving crank (38) are connected, the driven sprocket (55) and the clutch outer ring of the block clutch (37) are integrated, the command connecting rod (39) is respectively hinged to the command tripod plate A (40) and the command tripod plate B (41), the two ends of the internal gear (42) are respectively hinged to the command tripod plate A (40) and the command tripod plate B (41), the third driving mechanism is installed on the profile frame (80), and the rope needle driving crank (38), the rope feeding connecting rod (50), and the three-way rope needle frame (51) are hinged in sequence.

6. The continuous knotting test bench for multiple knotters according to claim 1, characterized in that: It also includes an image acquisition system (56), which is used to acquire on-site images of the knotting mouth action and transmit them to the control system V.

7. The continuous knotting test stand for multiple knotters according to claim 5, characterized in that: The rope clamping mechanism comprises a transition rope guide plate vertical plate (60), a transition rope guide plate bottom plate (61), a rope clamping limit rod (62), a rope clamping tube (63), a rope clamping tube supporting vertical plate (64), a rope clamping pressure plate (65), a first flange type linear bearing (66), a rope clamping optical axis (67), a first compression spring (68), a nut (69), a rope clamping guide base (70) and a rope clamping bottom plate (71); The rope guide plate (59) is mounted on the profile frame (80), the transition rope guide plate vertical plate (60) is mounted on the transition rope guide plate bottom plate (61), a group of rope clamping tubes (63) are respectively mounted on the rope clamping plate (65) and the rope clamping bottom plate (71) through the rope clamping tube supporting vertical plate (64), the two ends of the rope clamping plate (65) are respectively provided with a first flange type linear bearing (66), the first compression spring (68) is sleeved on one end of the rope clamping optical axis (67), and the rope clamping optical axis (6 The other end of the rope clamping base (7) passes through the first flange linear bearing (66) and is connected to the rope clamping base plate (71); one end of the rope clamping optical axis (67) is provided with a nut (69) for adjusting the compression degree of the first compression spring (68); the rope clamping guide base (70) is connected to the upper part of the rope clamping base plate (71) and is located above the rope clamping tube (63); the rope clamping base plate (71) is also provided with a pair of rope clamping limit rods (62), and the rope clamping limit rods (62) are located below the rope clamping tube (63).

8. The continuous knotting test stand for multiple knotters according to claim 1, characterized in that: The rope pulling mechanism comprises a nylon pulley (73), a flange-type linear bearing mounting plate (74), a second flange-type linear bearing (75), a rope pulling optical axis (76), a second compression spring (77), a rope pulling bottom plate (78) and a rope pulling mounting plate (79); One end of the rope pull optical axis (76) is sleeved with a second compression spring (77), and the other end is connected to the rope pull base plate (78) through a second flange-type linear bearing (75); the rope pull base plate (78) is mounted on a rope pull mounting plate (79), the second flange-type linear bearing (75) is mounted on a flange-type bearing mounting plate (74), and the nylon pulley (73) is mounted between the two flange-type bearing mounting plates (74); one end of the rope pull optical axis (76) is provided with a nut (69) for adjusting the compression degree of the second compression spring (77).

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