A dynamic disk type straw and grass clamping and pulling device for potato harvesting

Abstract

This invention provides a moving-fixed-disc type vine-pulling device for potato harvesting, characterized in that: two sets of clamping devices are symmetrically arranged on the left and right sides of the frame, and a reciprocating drive device is located below the frame, between the two sets of clamping devices. Each clamping device includes a moving disc, a fixed disc, a central shaft, a connecting shaft, a tightening sleeve, and a sliding sleeve. The moving disc and fixed disc, arranged vertically and parallel to the machine's forward direction, are arranged alternately. The reciprocating drive device includes a hydraulic motor, a slider, a connecting block, a rack ring, and a sector gear. A kidney-shaped rack ring is fixed above the connecting block, and the hollow rack ring has rack segments on its inner two straight sections along its length. The disk-shaped sector gear has teeth within a 120° circumferential range that mesh with the rack segments of the rack ring. This invention provides a reliable operating mechanism, eliminates the need for a vine-aligning mechanism, ensures smooth and controllable clamping operations, and is suitable for various working conditions, contributing to mechanized potato harvesting with reduced and prevented damage.

Description

Technical Field

[0001] This invention provides a moving and fixed disc type vine and weed clamping and pulling device for potato harvesting, belonging to the field of agricultural mechanization equipment. It is mainly used for removing potato vines and weeds before potato harvesting, aiming to solve the problems of easy damage to potato tubers and high impurity rate in traditional potato vine treatment methods. Background Technology

[0002] In recent years, with the adjustment of domestic agricultural planting structure, although the potato planting area has fluctuated, the demand for fully mechanized production of this important dual-purpose crop (grain and vegetable) remains urgent. In potato production, the removal of vines and weeds is a crucial step before harvest. Currently, the removal of vines and weeds mainly relies on manual weeding, mechanical cutting, or chemical treatment. Manual weeding is extremely inefficient and labor-intensive, and with the shortage of rural labor and rising labor costs, it is no longer suitable for the needs of current large-scale planting. Mechanical cutting often fails to completely remove vines and weeds, and the cutting blades can easily damage the tubers in the shallow soil layer, causing wounds and increasing the risk of disease during harvest and storage. Chemical weeding and vine removal poses a risk of pesticide residues, which is inconsistent with the principles of green production. These traditional methods of vine and weed removal not only affect the quality of potato harvest but have also become one of the bottlenecks restricting the improvement of potato production efficiency.

[0003] During mechanized harvesting, if vines and weeds are not effectively handled, they can interfere with the separation and cleaning devices, preventing potatoes from being properly stored and increasing the risk of mechanical blockage. They can also exacerbate collisions and friction between potatoes and mechanical parts, causing skin breakage and damage. Research has found that a significant portion of mechanical damage during potato harvesting can be traced back to improper handling of vines and weeds in the early stages. Adopting reasonable methods for removing vines and weeds can effectively reduce the rate of potato damage and impurity content in subsequent stages. Therefore, developing a moving-fixed disc vine and weed-pulling device for potato harvesting that efficiently removes vines and weeds while minimizing mechanical force on the potatoes, thus reducing damage and skin breakage, would help solve the problems of high reliance on manual labor, low efficiency, and high damage rates in the vine handling stage, providing strong support for achieving efficient and low-loss potato harvesting.

[0004] Looking at the current state of the potato production equipment industry, there is an urgent need for a dynamic and static disc-type vine-pulling device for potato harvesting that has reliable operating mechanism, does not require a matching vine straightening mechanism, has smooth and controllable clamping operation, is applicable to different working conditions and scenarios, and helps reduce and prevent potato damage. Summary of the Invention

[0005] The purpose of this invention is to provide a dynamic and fixed disc-type seedling and grass-pulling device for potato harvesting that can overcome the problems existing in the current agricultural mechanization equipment industry, not only ensuring reliable operation of the working mechanism and smooth and controllable clamping operation, but also helping to reduce and prevent potato damage.

[0006] The technical solution includes a frame, a clamping and pulling device, and a reciprocating drive device. Two sets of clamping and pulling devices are symmetrically arranged on the left and right sides of the frame. The reciprocating drive device is located below the frame and between the two sets of clamping and pulling devices. The frame includes a connecting plate I, vertical beams I, a connecting frame, a fixing frame, hydraulic cylinders, and a support device. The frame is composed of four vertical beams I and the corners of the rectangular connecting plate I. Each of the two vertical beams I on the left and right sides has a U-shaped connecting frame that can slide freely up and down the vertical beam I. The U-shaped bottom surfaces of the symmetrically arranged connecting frames are all located on the side away from the vertical beam I. A U-shaped fixing frame is fixed below the side of the connecting frame away from the vertical beam I, and the lower part of the fixing frame has a through hole perpendicular to the length direction of the vertical beam I. The two ends of the side of the connecting plate I parallel to the U-shaped bottom surface of the connecting frame are connected to the cylinder ends of two hydraulic cylinders respectively. The upper part of the U-shaped bottom surface of the connecting frame away from the vertical beam I... Both ends are connected to the cylinder rod ends of two hydraulic cylinders respectively. A support device is provided at the lower part of the connecting plate I. The support device consists of four vertical beams II and the corners of the rectangular plate-shaped connecting plate II. The lower parts of the two sets of vertical beams II on the left and right sides are connected to two longitudinal beams I respectively. The middle parts of the two transversely arranged, groove-shaped slides are located at both ends of the longitudinal beams I, and the two ends of the slides are supported on the longitudinal beams II that can slide freely on the vertical beams I. The lower part of the connecting plate I is connected to the cylinder body ends of the two hydraulic cylinders, and the upper part of the connecting plate II is connected to the cylinder rod ends of the two hydraulic cylinders. The clamping and pulling device includes a moving plate, a fixed plate, a central shaft, a connecting shaft, a tightening sleeve, and a sliding sleeve. The center of both the moving plate and the fixed plate has a through hole, and multiple through holes are evenly arranged at the midpoint of the radius of the moving plate and the fixed plate from the center of the plate. The vertically arranged moving plate and the fixed plate, which are parallel to the forward direction of the machine, are arranged alternately. The first moving plate near the fixed frame end is marked as n. j1 The second moving plate is marked as n j2 And so on, the i-th moving disk is labeled n. ji The first fixed plate near the end of the fixed frame is marked as n. q1 The second fixed plate is marked as n. q2 And so on, the kth fixed plate is marked as n. qk Number n q1 The fixed plates are arranged on the side closest to the fixed frame and are numbered n. j1 The moving disks are arranged in the numbered n q1 The side of the fixed plate furthest from the fixed frame is numbered n. q2 The fixed plates are arranged in the numbered n j1The moving disk is located on the side furthest from the fixed frame, and so on. The fixed and moving disks are arranged alternately, with k=i+1, meaning the disk furthest from the fixed frame is the fixed disk. Each moving disk has a central hole fitted with an expansion sleeve, and multiple through holes along the circumference of the moving disk are fitted with sliding sleeves, except for the one numbered n. q1 All the fixed plates except for the one with the center hole are fitted with a sliding sleeve, and multiple through holes in the circumference of the fixed plate are fitted with expansion sleeves. The central shaft passes through the holes numbered n in sequence. qk The sliding sleeve of the fixed plate, numbered n ji The tightening sleeve of the moving disc, numbered n qk-1 The fixed plate sliding sleeve, numbered n ji-1 The moving disc tightening sleeve... up to number n j1 Up to the tightening sleeve of the moving disc, multiple connecting shafts pass through sequentially, numbered n. qk The tightening sleeve of the fixed plate, numbered n ji The sliding sleeve of the moving disc, numbered n qk-1 The tightening sleeve of the fixed plate, numbered n ji-1 The sliding sleeve of the moving disk... up to number n q1 The reciprocating drive device, including a hydraulic motor, sliders, connecting blocks, rack rings, and sector gears, consists of two rectangular sliders that are symmetrically arranged on the left and right. The two sides of the sliders, perpendicular to the longitudinal beam I, are respectively embedded into two slide rails. The two sliders are connected to the left and right ends of a long, narrow connecting block with a central through-hole. The length direction of the through-hole is aligned with the length direction of the connecting block. A waist-shaped rack ring is fixed above the connecting block, with rack segments on the two straight sections inside the hollow rack ring along its length. A disk-shaped sector gear has teeth within a 120° circumferential range that mesh with the rack segments of the rack ring. The output shaft of the hydraulic motor, fixed to a fixed plate supported on the longitudinal beam I, is connected to the extended shaft of the sector gear via a coupling. The end of the central shaft furthest from the fixed frame is supported by a bearing seat mounted on the slider and connected to the output shaft of the hydraulic motor. The output shaft of the hydraulic motor mounted on the fixed frame is connected to the shaft of the sector gear mounted on the fixed plate via a coupling. q1 The shaft is connected to the center hole of the fixed plate.

[0007] Compared with existing technologies, this invention, by employing a transmission method involving the meshing of a sector gear and an oval rack ring, transforms the continuous rotational motion of the hydraulic motor into the linear reciprocating motion of the connecting block and slider along the slide rail. Compared to traditional crank-connecting rod and cam-type reciprocating drive mechanisms, this method offers smoother transmission, lower impact load, and precise control of the reciprocating stroke. It can stably drive the moving plate to perform high-frequency, high-precision axial reciprocating movement relative to the fixed plate, thereby achieving precise alternating clamping and release of potato vines and weeds by the moving and fixed plates. This fundamentally ensures the stability and reliability of the core clamping and pulling action. Especially in scenarios where potato vines and weeds are distributed laterally along the potato rows, the efficient clamping and pulling achieved through the interplay between the reciprocating movement of the moving plate and the fixed plate avoids the need for additional vine and weed straightening components and eliminates the problem of ineffective straightening by such components.

[0008] Because the moving and fixed discs adopt an axially staggered arrangement design, combined with the differentiated assembly method of the expansion sleeve and sliding sleeve, the central shaft drives the moving disc to rotate synchronously, and the connecting shaft drives the fixed disc to rotate synchronously. At the same time, due to the high-precision synchronous control of the rotation of the moving and fixed discs, at the moment of clamping the vines and weeds, the moving and fixed discs form a stable clamping action with a full-width and multi-point position through axial reciprocating movement. The synchronous rotational motion drives the vines to perform a rotating and pulling action. Through the rotating and pulling action, the connection between the vine roots and the soil is loosened first, and then the vines are pulled up by the roots. With this clamping and pulling method, the clamping contact area between the vines and the disc is large, and the clamping force is evenly distributed, rather than the simple rigid pulling of traditional operations. Therefore, it completely avoids the problems of vine stem breakage and root residue left in the field caused by the concentration of pulling stress. It effectively solves the problems of stubble retention in traditional vine-killing machines and the low removal rate of the clamping and pulling mechanism. It can completely remove vines and weeds and greatly reduce the burden of subsequent separation and cleaning of potato combine harvesters.

[0009] Because the entire clamping and pulling device forms a sliding fit with the vertical beam of the frame through a U-shaped connecting frame, the overall lifting and lowering adjustment of the clamping and pulling device along the vertical beam direction can be achieved under the extension and retraction action of the hydraulic cylinder. At the same time, the supporting device is equipped with a lifting structure with hydraulic cylinder extension and retraction, which can synchronously adjust the working height of the reciprocating drive device, realizing stepless adjustment of the clamping and pulling working height across the entire range. Since the tensioning sleeve adopts a keyless connection assembly method, it not only has a large transmission torque and strong operational stability, but also significantly reduces the difficulty of assembly and maintenance. The sliding sleeve ensures smooth axial relative sliding between the moving plate and the fixed plate, solving the problem of clamping action jamming and improving the reliability of continuous operation of the equipment. Therefore, the operating height of the clamping and pulling device can be flexibly adjusted according to the actual operating conditions such as the characteristics of potato varieties, the growth status of vines and weeds, the difference in ridge height, and the lodging situation. This ensures that the clamping and pulling mechanism can accurately target the base of the vines and weed stems. Whether it is an upright and vigorous vine, a vine that has fallen to the ground, or a potato field with different plant heights and planting patterns, it can achieve stable clamping and efficient pulling. Its operational adaptability is significantly better than that of traditional fixed vine-killing machines and clamping and pulling equipment. Attached Figure Description

[0010] Figure 1 This is an isometric view of an embodiment of the present invention; Figure 2 This is the present invention. Figure 1 Axonometric view of the frame in the illustrated embodiment; Figure 3 This is the present invention. Figure 1 Axonometric view of the clamping and pulling device in the embodiment shown; Figure 4 This is the present invention. Figure 1 Axonometric view of the reciprocating drive device of the embodiment shown; Figure 5 This is the present invention. Figure 2 Axonometric view of the support device in the illustrated embodiment. Detailed Implementation

[0011] 1. Frame 11. Connecting Plate I 12. Vertical Beam I 13. Connecting Frame 14. Fixed Frame 15. Hydraulic Cylinder 16. Support Device 161. Vertical Beam II 162. Connecting Plate II 163. Longitudinal Beam I 164. Slide Rail 165. Longitudinal Beam II 2. Clamping and Pulling Device 21. Moving Plate 22. Fixed Plate 23. Central Shaft 24. Connecting Shaft 25. Expansion Sleeve 26. Sliding Sleeve 3. Reciprocating Drive Device 31. Hydraulic Motor 32. Slider 33. Connecting Block 34. Rack Ring 35. Sector Gear exist Figures 1-5In the embodiment shown: two sets of clamping and pulling devices 2 are symmetrically arranged on the left and right sides of the frame 1. The reciprocating drive device 3 is located below the frame 1 and between the two sets of clamping and pulling devices 2. The frame 1 is composed of four vertical beams I12 and rectangular plate-shaped connecting plates I11 fixed at their corners. Each of the two vertical beams I12 on the left and right sides has a U-shaped connecting frame 13 that can slide freely up and down the vertical beam I12. The U-shaped bottom surfaces of the symmetrically arranged connecting frames 13 are all located on the side away from the vertical beams I12. A U-shaped plate-shaped fixing frame 14 is fixed below the side of the connecting frame 13 away from the vertical beams I12, and the fixing frame 14 has a through hole perpendicular to the length direction of the vertical beams I12 at its lower part. The two ends of the side of the connecting plate I11 parallel to the U-shaped bottom surface of the connecting frame 13 are respectively connected to the cylinder bodies of two hydraulic cylinders 15. The two ends of the upper part of the U-shaped bottom surface of the connecting frame 13 away from the vertical beams I12 are respectively connected to the cylinder rods of two hydraulic cylinders 15. The lower part of the connecting plate 11 is provided with a support device 16, which consists of four vertical beams II 161 fixed at the corners of a rectangular plate-shaped connecting plate II 162. The two sets of vertical beams II 161 on the left and right sides are respectively connected to two longitudinal beams I 163. The middle of two transversely arranged, trough-shaped slides 164 is located at both ends of the longitudinal beams I 163, and the two ends of the slides 164 are supported on longitudinal beams II 165 that can slide freely on the vertical beams I 12. The connecting plate... The lower part of I11 is connected to the cylinder body end of the two hydraulic cylinders 15, and the upper part of the connecting plate II162 is connected to the cylinder rod end of the two hydraulic cylinders 15. The center of the moving plate 21 and the fixed plate 22 of the clamping device 2 are both opened with through holes, and three through holes are evenly arranged at the middle position of the radius of the moving plate 21 and the fixed plate 22 from the center of the plate. The moving plate 21 and the fixed plate 22, which are arranged vertically and parallel to the forward direction of the machine, are arranged alternately. The first moving plate 21 near the fixed frame 14 is marked with n. j1 The second moving disk 21 is marked as n j2 And so on, the i-th moving disk 21 is marked as n. ji The first fixed plate 22 near the end of the fixed frame 14 is marked as n. q1 The second fixed plate 22 is marked as n. q2 And so on, the kth fixed plate 22 is marked as n. qk Number n q1 The fixed plates 22 are arranged on the side closest to the fixed frame 14 and are numbered n. j1 The moving disks 21 are arranged in the numbered n q1 The side of the fixed plate 22 furthest from the fixed frame 14 is numbered n. q2 The fixed plate 22 is arranged in the numbered n j1The moving disk 21 is located on the side furthest from the fixed frame 14. Similarly, the fixed disk 22 and the moving disk 21 are arranged alternately, with k=i+1, meaning the disk furthest from the fixed frame 14 is the fixed disk 22. Each moving disk 21 has a central hole fitted with an expansion sleeve 25, and each of the three through holes along the circumference of the moving disk 21 has a sliding sleeve 26, except for the one numbered n. q1 All the fixed plates 22 except for the center hole are fitted with sliding sleeves 26, and the three through holes in the circumferential direction of the fixed plates 22 are fitted with expansion sleeves 25. The central shaft 23 passes through the holes numbered n in sequence. qk The sliding sleeve 26 of the fixed plate 22, numbered n ji The tensioning sleeve 25 of the moving disc 21, numbered n qk-1 Fixed plate 22 sliding sleeve 26, numbered n ji-1 The moving disc 21, the tightening sleeve 25... up to the number n j1 Up to the tension sleeve 25 of the moving disc 21, multiple connecting shafts 24 pass through the numbered n in sequence. qk The tightening sleeve 25 of the fixing plate 22, numbered n ji The sliding sleeve 26 of the moving disk 21, numbered n qk-1 The tightening sleeve 25 of the fixing plate 22, numbered n ji-1 The sliding sleeve 26 of the moving disk 21... up to the numbered n q1 Up to the tightening sleeve 25 of the fixed plate 22, the two rectangular sliders 32 of the reciprocating drive device 3, which are symmetrical on the left and right, are respectively embedded in the two slide rails 164 with their two sides perpendicular to the longitudinal beam I 163. The two sliders 32 are connected to the left and right ends of the elongated connecting block 33, which has a long through hole in the middle. The length direction of the long through hole of the connecting block 33 is consistent with the length direction of the connecting block 33. A waist-shaped rack ring 34 is fixed above the connecting block 33. The two straight segments on the inner side of the hollow rack ring 34 in the length direction are provided with teeth. The sector gear 35, which is disc-shaped, has teeth within a 120° circumferential range that mesh with the rack segment of the rack ring 34. The output shaft of the hydraulic motor 31, fixed to a fixed plate supported on the longitudinal beam I163, is connected to the extended shaft of the sector gear 35 via a coupling. The end of the central shaft 23 furthest from the fixed frame 14 is supported by a bearing seat mounted on the slider 32 and then connected to the output shaft of the hydraulic motor 31. The output shaft of the hydraulic motor 31, mounted on the fixed frame 14, is connected to the shaft of the pump mounted on the slider 32 via a coupling. q1 The fixed plate 22 is connected to the shaft in the center hole. As the machine moves forward, the moving plate 21 and the fixed plate 22 are driven by the hydraulic motor 31 and the reciprocating drive device 3 to continuously complete the rotation and clamping action, and then complete the clamping and pulling operation of potato vines and weeds through the interaction between the moving plate 21 and the fixed plate 22.

[0012] Its working principle is as follows: The moving and fixed disc type seedling clamping and pulling device is mounted on the rear of the tractor through a suspension device. The reciprocating drive device is located below the entire device. Two sets of clamping and pulling devices are symmetrically arranged on the left and right sides of the reciprocating drive device. When the hydraulic motors of the reciprocating drive device, the hydraulic motors driving the fixed disc to rotate, and the hydraulic motors driving the central shaft to rotate are started, the implement moves forward along the potato ridge under the drive of the tractor. When the hydraulic motors of the reciprocating drive device are started, the output shaft of the hydraulic motor drives the sector gear to rotate through the coupling. The sector gear with meshing teeth within a 120° angle range meshes with the rack ring mounted on the connecting block. The teeth of the sector gear mesh with the straight rack segment on one side of the rack ring mounted on the connecting block, driving the connecting block to move horizontally in one direction. Because the arc segment of the rack ring has no meshing teeth, when the sector gear rotates through the set angle, the teeth gradually disengage from the rack segment on that side of the rack ring, and then enter a meshing state with the straight rack segment on the other side of the rack ring, thereby driving the connecting block to move horizontally in the opposite direction. This cycle repeats continuously, ultimately converting the continuous rotational motion of the hydraulic motor into the linear reciprocating motion of the connecting block. The left and right ends of the connecting block are fixedly connected to the slider, allowing the slider to slide synchronously back and forth along the slide rail, thereby driving the central shaft to complete synchronous axial reciprocating motion. When the clamping and pulling devices on both sides of the machine are operating, the central shaft forms an axial sliding fit with the fixed plate through a sliding sleeve, achieving relative axial movement between the two. The central shaft is fixedly connected to the moving plate through a tightening sleeve, driving the moving plate to complete synchronous reciprocating and rotational motion. One end of the fixed plate is connected to the fixed frame and the corresponding hydraulic motor through a shaft, thus maintaining the fixed plate position relative to the frame. Simultaneously, the fixed plate rotates under the drive of the hydraulic motor. The hydraulic motors driving the central shaft and the fixed plate start synchronously, maintaining the same speed and direction of rotation. This causes the central shaft to rotate the moving plate as well. Driven by the drive unit, the central shaft slides within the central hole of the fixed plate, completing axial reciprocating motion. Based on this axial reciprocating motion relative to the fixed plate, the moving plate first presses against one side of the fixed plate, then against the other side, cyclically completing a stable clamping action. The clamping action, combined with the synchronous rotation of the moving and fixed plates, allows for the stable clamping of potato vines and weeds. The upward rotational action along the machine's forward direction then removes the vines and weeds by the roots, completing the clamping and weeding operation. In practical use, the hydraulic motor mounted on the fixed frame can be removed. Instead, the hydraulic motor on the other side drives the central shaft, rotating the moving plate. The moving plate, via a connecting shaft, synchronously rotates the fixed plate, and the combined action completes the clamping and rotational action, achieving the clamping and removal of potato vines and weeds.Depending on the different working conditions in the field, the overall working height of the clamping and pulling device can be adjusted by adjusting the extension and retraction stroke of the hydraulic cylinder mounted on the frame. This adapts to the actual working conditions such as the characteristics of different potato varieties, the growth status of vines and weeds, differences in ridge height, and lodging conditions. It ensures the adaptability of the machine to complex field conditions and guarantees the stability and removal rate of vines and weeds.

Claims

1. A moving-fixed disc type vine-pulling device for potato harvesting, comprising a frame (1), a pulling device (2), and a reciprocating drive device (3), characterized in that: Two sets of clamping devices (2) are symmetrically arranged on the left and right sides of the frame (1). The reciprocating drive device (3) is located below the frame (1) and between the two sets of clamping devices (2). The frame (1) includes a connecting plate I (11), vertical beam I (12), connecting frame (13), fixing frame (14), hydraulic cylinder (15), and supporting device (16). The frame (1) is composed of four vertical beams I (12) and the corners of the rectangular plate-shaped connecting plate I (11). The middle of the two vertical beams I (12) on the left and right sides is provided with a U-shaped connecting frame (13) that can slide freely up and down on the vertical beam I (12). The U-shaped bottom surfaces of the symmetrically arranged connecting frames (13) are all located on the side away from the vertical beam I (12). A U-shaped plate-shaped fixing frame (14) is fixed below the side of the connecting frame (13) away from the vertical beam I (12), and the lower part of the fixing frame (14) has a through hole perpendicular to the length direction of the vertical beam I (12). The two ends of the side of the connecting plate I (11) parallel to the U-shaped bottom surface of the connecting frame (13) are respectively connected to the cylinder body ends of the two hydraulic cylinders (15). The two ends above the U-shaped bottom surface of the connecting frame (13) away from the vertical beam I (12) are respectively connected to the cylinder rod ends of the two hydraulic cylinders (15). The lower part of plate I (11) is provided with a support device (16), which is composed of four vertical beams II (161) and the corners of a rectangular plate-shaped connecting plate II (162). The two sets of vertical beams II (161) on the left and right sides are respectively connected to two longitudinal beams I (163). The middle part of two transversely arranged, trough-shaped slides (164) is located at both ends of the longitudinal beams I (163), and the two ends of the slides (164) are supported on the longitudinal beams II (165) that can slide freely on the vertical beams I (12). The lower part of the connecting plate I (11) is connected to the cylinder ends of two hydraulic cylinders (15). The upper part of the connecting plate II (162) is connected to the cylinder rod ends of two hydraulic cylinders (15). The clamping and pulling device (2) includes a moving plate (21), a fixed plate (22), a central shaft (23), a connecting shaft (24), a tightening sleeve (25), and a sliding sleeve (26). The center of both the moving plate (21) and the fixed plate (22) has through holes, and multiple through holes are evenly provided at the middle position of the radius of the moving plate (21) and the fixed plate (22) from the center of the plate. The moving plate (21) and the fixed plate (22) arranged vertically and parallel to the forward direction of the machine are arranged alternately. The first moving plate (21) near the fixed frame (14) is marked as n. j1， The second moving disk (21) is marked as n j2 And so on, the i-th moving disk (21) is marked as n. ji The first plate (22) near the end of the mounting bracket (14) is marked as n. q1， The second fixed plate (22) is marked as n q2 And so on, the kth fixed plate (22) is marked as n. qk Number n q1 The fixed plates (22) are arranged on the side closest to the fixed frame (14) and are numbered n. j1 The moving disks (21) are arranged in the numbered n q1 The plate (22) is located on the side away from the fixing frame (14), and is numbered n. q2 The fixed plate (22) is arranged in the numbered n j1 The moving disk (21) is located on the side furthest from the fixed frame (14), and so on. The fixed disk (22) and the moving disk (21) are arranged alternately, and k=i+1, that is, the disk furthest from the fixed frame (14) is the fixed disk (22). The center hole of the moving disk (21) is equipped with a tightening sleeve (25), and multiple through holes in the circumferential direction of the moving disk (21) are equipped with sliding sleeves (26), except for the one numbered n. q1 All the fixed plates (22) except for the center hole are fitted with sliding sleeves (26), and multiple through holes in the circumferential direction of the fixed plates (22) are fitted with expansion sleeves (25). The central shaft (23) passes through the numbered n in sequence. qk The sliding sleeve (26) of the fixed plate (22), numbered n ji The tightening sleeve (25) of the moving plate (21), numbered n qk-1 The fixed plate (22) and sliding sleeve (26), numbered n ji-1 The moving disc (21) tightening sleeve (25) ... up to the number n j1 Up to the tightening sleeve (25) of the moving disc (21), multiple connecting shafts (24) pass through the numbered n in sequence. qk The tightening sleeve (25) of the fixed plate (22), numbered n ji The sliding sleeve (26) of the moving disk (21), numbered n qk-1 The tightening sleeve (25) of the fixed plate (22), numbered n ji-1 The sliding sleeve (26) of the moving disk (21) ... up to the numbered n q1 Up to the tightening sleeve (25) of the fixed plate (22), the reciprocating drive device (3) includes a hydraulic motor (31), a slider (32), a connecting block (33), a rack ring (34), and a sector gear (35). The two rectangular sliders (32) that are symmetrical on the left and right are respectively embedded in the two slide rails (164) with their two sides perpendicular to the longitudinal beam I (163). The two sliders (32) are connected to the left and right ends of the long strip-shaped connecting block (33) with a long strip through hole in the middle. The length direction of the long strip through hole of the connecting block (33) is consistent with the length direction of the connecting block (33). A waist-shaped rack ring (34) is fixed above the connecting block (33). The empty rack ring (34) has rack segments on the two straight sections on the inner side along its length. A disk-shaped sector gear (35) has teeth within a 120° circumferential range that mesh with the rack segments of the rack ring (34). The output shaft of the hydraulic motor (31), fixed on a fixed plate supported on the longitudinal beam I (163), is connected to the extended shaft of the sector gear (35) via a coupling. The end of the central shaft (23) away from the fixed frame (14) is supported by a bearing seat mounted on the slider (32) and connected to the output shaft of the hydraulic motor (31). The output shaft of the hydraulic motor (31) mounted on the fixed frame (14) is connected to the shaft mounted on the numbered n via a coupling. q1 The shaft is connected to the center hole of the fixed plate (22).

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