A mulch film transverse shrinkage mechanism and a rice dry direct seeding machine comprising the same

Abstract

The application provides a mulch transverse contraction mechanism and a rice dry direct seeding machine comprising the mechanism. The contraction mechanism comprises a support frame, a first support shaft and a second support shaft. The first support shaft and the second support shaft are transversely arranged on the support frame. The second support shaft can be swung up and down and positioned relative to the first support shaft. A plurality of first contraction pressure rollers and a plurality of second contraction pressure rollers are arranged on the first support shaft and the second support shaft respectively. The first contraction pressure rollers and the second contraction pressure rollers are distributed in a left-right staggered state. The front and rear of the first contraction pressure rollers and the second contraction pressure rollers staggered in a left-right staggered state are close to each other, so that the mulch between the first contraction pressure rollers and the second contraction pressure rollers can be effectively transversely contracted. After the mulch is transversely contracted, the mulch will not be tensioned in the transverse direction, so that the mulch can be effectively matched with the groove on the ground, thereby forming an effective water collecting groove.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rice dry direct seeding, in particular to a mulch transverse shrinkage mechanism and a rice dry direct seeding machine comprising the same. BACKGROUND

[0002] With the increasing of climate change and industrial and urban water consumption, the contradiction between limited water resources and agricultural water use is becoming increasingly tense, and drought resistance, water saving, simplification, high yield and efficient cultivation have become the trend of modern agricultural development. Rice film mulching without punching dry direct seeding is a cultivation mode of water saving, cost saving and efficiency increasing. Especially in the areas where water resources are insufficient for rice transplanting and rice dry direct seeding is drought and water shortage in the seeding season, and dry crops are prone to flooding in summer, rice film mulching drought-resistant cultivation technology is widely used.

[0003] A rice dry direct seeding, watering, fertilizing and mulching integrated machine is disclosed in Chinese patent application publication No. CN113508664A, which comprises a watering assembly, a fertilizing assembly, a seeding assembly, a rotary tillage assembly, a front spherical ditching wheel assembly, a soil covering assembly, a mulching assembly, a frame, a rear spherical film pressing wheel assembly, a transmission assembly and a depth limiting wheel assembly. In the above-mentioned technical solution, the front spherical ditching wheel assembly is used to realize rice ditching seeding, the mulching assembly is used to cover the ditch after seeding, and the rear spherical film pressing wheel assembly is used to press the ditch after mulching, thereby facilitating the formation of a collection groove on the upper part of the ditch, the water collecting effect of the collection groove is realized by the water resistance of the mulch, and the collection groove can collect water to facilitate the growth of rice. When the above-mentioned mulching assembly is used for mulching, the mulch is in a completely transversely stretched state covering the ground, and at the same time, the soil is covered during mulching, and the film is pressed after covering the soil. Since the mulch is tightly compacted by the soil on the ground, when the rear spherical film pressing wheel is used for pressing the film again, although a ditch can be formed on the soil, the mulch cannot form an effective ditch shape after being rolled by the rear spherical film pressing wheel, resulting in poor actual water collecting effect of the mulch. SUMMARY

[0004] The present application aims to provide a mulch transverse shrinkage mechanism and a rice dry direct seeding machine comprising the same, which utilizes the front-to-back mutual approach of the first shrinkage pressing wheel and the second shrinkage pressing wheel distributed alternately left and right to realize the effective transverse shrinkage of the mulch located between the two, so that the mulch will not be tensioned in the transverse direction after being transversely shrunk, thereby enabling it to effectively fit the ditch on the ground and form an effective water collecting groove.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a mulch transverse contraction mechanism, comprising a support frame, a first support shaft and a second support shaft, the first support shaft and the second support shaft are both transversely arranged on the support frame, and the second support shaft is located below and behind the first support shaft, the second support shaft can be swung up and down and positioned relative to the first support shaft, a plurality of equally spaced first contraction pressure wheels and second contraction pressure wheels are arranged on the first support shaft and the second support shaft respectively, the first contraction pressure wheels and the second contraction pressure wheels adjacent in front and back are distributed in a left-right staggered state, when the second support shaft is located at the upper limit of swinging, the distance between the axis of the first support shaft and the axis of the second support shaft is less than the sum of the radii of the first contraction pressure wheels and the second contraction pressure wheels.

[0006] Preferably, an auxiliary film pressing wheel is arranged at the two ends of the first support shaft.

[0007] Further, the auxiliary film pressing wheel is composed of at least two first contraction pressure wheels arranged side by side.

[0008] Further, the first contraction pressure wheels and the auxiliary film pressing wheel are fixedly arranged on the first support shaft, the first support shaft is rotatably arranged on the support frame, the second contraction pressure wheels are fixedly arranged on the second support shaft, and the second support shaft can be freely rotated.

[0009] Further, a swinging support mechanism for supporting the swinging and positioning of the second support shaft is arranged on the support frame, the swinging support mechanism comprises swinging arms, swinging connecting rods, a swinging drive rod and a swinging positioning rod, two swinging arms are transversely and oppositely hingedly arranged on the lower part of the support frame, the two ends of the second support shaft are respectively sleeved in the bearings arranged on the swinging arms, the swinging drive rod is transversely and rotatably arranged on the upper part of the support frame, a rotating connecting rod and a handle are fixedly arranged at the left end and the right end of the swinging drive rod respectively, a swinging connecting rod is arranged on each of the two swinging arms, the upper part of the swinging connecting rod on the right side of the support frame is hingedly connected with the support frame, and the lower part is movably connected with the corresponding swinging arm, the upper part of the swinging connecting rod on the left side of the support frame is hingedly connected with the rotating connecting rod, and the lower part is movably connected with the corresponding swinging arm, the swinging positioning rod is arranged on the left side of the support frame and adjacent to the handle, when the handle is swung downward and placed on the lower part of the swinging positioning rod, the positioning of the swinging arms after swinging upward is realized.

[0010] Preferably, the swinging connecting rod comprises a first connecting plate and a tension spring, the upper end of the tension spring is hung on the lower end of the corresponding first connecting plate, the other end of the tension spring is hung on a hanging ring of the corresponding swinging arm, and the upper part of the first connecting plate is hingedly connected with the corresponding rotating connecting rod or support frame.

[0011] Further, the shrinkage mechanism further comprises a driving mechanism, which adopts chain transmission to realize rotation driving of the first supporting shaft.

[0012] Further, a mulch roll placing rack is arranged at the front of the supporting frame, and the mulch roll placing rack is located above the front of the first supporting shaft, the mulch roll placing rack comprises a left support and a right support, the left support and the right support are opposite to each other, an upper part of the left support is fixedly provided with a bearing, and an upper part of the right support is provided with a support with a U-shaped groove.

[0013] A rice dry direct seeding machine comprises the mulch transverse shrinkage mechanism.

[0014] The mulch transverse shrinkage mechanism has the advantages that the structure is simple, and the processing and manufacturing are convenient; during mulching, the second supporting shaft swings towards the first supporting shaft, so that an S-shaped extrusion space is formed between the left and right staggered first and second shrinkage pressure wheels, the mulch is arranged in the S-shaped extrusion space, and the effective shrinkage of the mulch in the width direction is realized; when the transversely shrunk mulch is combined with the groove on the ground, the transverse tension phenomenon does not occur, so that the mulch collection groove can be effectively realized, the water flow can be collected, the water supply for the rice in the mulch collection groove is facilitated, the concentrated and effective utilization of the water flow is facilitated, and the water source is saved; the second supporting shaft can swing up and down and be positioned, so that the free end of the mulch can be smoothly clamped between the first supporting shaft and the second supporting shaft at the initial stage of mulching; the first and second shrinkage pressure wheels can rotate freely, so that the sliding between the mulch and the first and second shrinkage pressure wheels is facilitated; during mulching, the telescopic property of the tension spring is utilized, the transverse shrinkage and clamping of the first and second shrinkage pressure wheels on the mulch can adapt to the longitudinal tension change of the mulch, and the continuous and effective mulching operation is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are part of the preferred embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0017] Figure 2 It is a side view of the overall structure of the present application;

[0018] Figure 3The schematic view of the state of the first and second shrinkage wheels for realizing the lateral shrinkage of the mulch film extrusion;

[0019] Figure 4 The first and second shrinkage wheels for realizing the lateral shrinkage of the mulch film extrusion; Figure 1 The enlarged view of A in the middle;

[0020] Figure 5 The first and second shrinkage wheels for realizing the lateral shrinkage of the mulch film extrusion; Figure 2 The enlarged view of B in the middle;

[0021] In the figure: 1 support frame, 2 first support shaft, 21 first shrinkage wheel, 22 auxiliary film pressing wheel, 3 second support shaft, 31 second shrinkage wheel, 41 swing arm, 411 hanging ring, 42 swing connecting rod, 421 first connecting plate, 422 tension spring, 43 swing driving rod, 431 handle, 432 rotating connecting rod, 44 swing positioning rod, 51 left support, 52 right support, 6 mulch film. DETAILED DESCRIPTION

[0022] The specific embodiments and drawings will be described below. Figures 1-5 The technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are only some preferred embodiments of the present application, not all the embodiments. Those skilled in the art can make similar modifications without departing from the concept of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] The present application provides a mulch film lateral shrinkage mechanism (such as Figure 1The support frame 1, the first support shaft 2 and the second support shaft 3 are arranged in parallel to each other, and the second support shaft 3 is capable of swinging up and down relative to the first support shaft 2 and positioning, a plurality of first contraction pressure wheels 21 and second contraction pressure wheels 31 are arranged on the first support shaft 2 and the second support shaft 3 at equal intervals, and the first contraction pressure wheels 21 and the second contraction pressure wheels 31 adjacent to each other are arranged in a staggered manner, and when the second support shaft 3 is at the upper limit position, the distance between the axis of the first support shaft 2 and the axis of the second support shaft 3 is less than the sum of the radii of the first contraction pressure wheels 21 and the second contraction pressure wheels 31. In actual application, the up-and-down swinging function of the second support shaft 3 is utilized, so that the radial distance between the second contraction pressure wheels 31 and the first contraction pressure wheels 21 can be realized, and when the second support shaft 3 is swung to the upper limit position, the distance between the axis of the first support shaft 2 and the axis of the second support shaft 3 is less than the sum of the radii of the first contraction pressure wheels 21 and the second contraction pressure wheels 31, that is, the outer side of the second contraction pressure wheels 31 has been partially inserted into the gap between the two first contraction pressure wheels 21, and in actual application, the degree of insertion of the second contraction pressure wheels 31 into the gap between the two first contraction pressure wheels 21 can be set according to the actual lateral contraction amount of the mulch film; when the second support shaft 3 is swung to the upper limit position, the plurality of first contraction pressure wheels 21 and second contraction pressure wheels 31 guide and extrude the mulch film 6 located therebetween, so that the mulch film 6 forms an S-shaped distribution, thereby realizing the lateral contraction of the mulch film 6 in the lateral direction (the width direction of the mulch film), and after the lateral contraction, the mulch film 6 will not be stretched in the lateral direction when it is attached to the groove on the ground, thereby effectively realizing the mulch film collection groove, the mulch film collection groove can realize the collection of water flow, thereby facilitating the water supply of the rice in the mulch film collection groove, improving the concentrated and effective use of water flow, and saving water resources; during the lateral contraction of the mulch film, in order to ensure that the two sides of the mulch film are in a flat state and to effectively cover the side edges of the mulch film, an auxiliary film pressing wheel 22 is arranged at each end of the first support shaft 2, and in actual application, the auxiliary film pressing wheel 22 is composed of at least two first contraction pressure wheels 21 arranged side by side, and in this embodiment, the number of first contraction pressure wheels 21 in the auxiliary film pressing wheel 22 is set to four.

[0024] In the actual mulching process, the mulching film is constantly moving between the first shrinkage pressure roller 21 and the second shrinkage pressure roller 31. In order to facilitate the smooth movement of the mulching film between the two, the first shrinkage pressure roller 21 and the auxiliary film pressing roller 22 are fixedly arranged on the first support shaft 2, the first support shaft 2 is rotatably arranged on the support frame 1, and specifically, the two ends of the first support shaft 2 are sleeved in the bearings arranged on the support frame 1; the second shrinkage pressure roller 31 is fixedly arranged on the second support shaft 3, and the second support shaft 3 can freely rotate, and specifically, the two ends of the second support shaft 3 are rotatably supported through bearings; in order to further improve the smooth movement of the mulching film between the first shrinkage pressure roller 21 and the second shrinkage pressure roller 31, a driving mechanism can be arranged in the shrinkage mechanism, and the driving mechanism adopts chain transmission to realize the rotary driving of the first support shaft 2.

[0025] On the basis of the above-mentioned embodiment, the specific implementation of the up-and-down swinging and positioning of the second supporting shaft 3 is that a swinging supporting mechanism for supporting the swinging and positioning of the second supporting shaft 3 is arranged on the supporting frame 1, the swinging supporting mechanism comprises swinging arms 41, swinging connecting rods 42, a swinging driving rod 43 and a swinging positioning rod 44, two of the swinging arms 41 are arranged in a horizontal opposite manner and are hingedly arranged at the lower part of the supporting frame 1, the swinging arms 41 can freely swing relative to the supporting frame 1, the two ends of the second supporting shaft 3 are respectively sleeved in the bearings arranged on the swinging arms 41, so that the second supporting shaft 3 can freely rotate, the swinging driving rod 43 is arranged in a horizontal rotating manner at the upper part of the supporting frame 1, specifically, the swinging driving rod 43 is sleeved in the through holes of the two supporting lug plates arranged at the upper part of the supporting frame 1, the swinging driving rod 43 can freely rotate relative to the supporting frame 1, a rotating connecting rod 431 and a handle 432 are respectively fixedly arranged at the left end and the right end of the swinging driving rod 43, the rotation of the swinging driving rod 43 is realized by rotating the handle 432, and then the swinging driving of the rotating connecting rod 431 is realized, the swinging connecting rod 42 is arranged on each of the two swinging arms 41, the upper part of the swinging connecting rod 42 located at the right side of the supporting frame 1 is hingedly connected with the supporting frame 1, and the lower part is movably connected with the corresponding swinging arm 41, the upper part of the swinging connecting rod 42 located at the left side of the supporting frame 1 is hingedly connected with the rotating connecting rod 431, and the lower part is movably connected with the corresponding swinging arm 41, in actual application, the up-and-down movement of the swinging connecting rod 42 is driven by rotating the handle 432, and then the up-and-down swinging movement of the second supporting shaft 3 is realized, the swinging positioning rod 44 is arranged at the left side of the supporting frame 1 and is adjacent to the handle 432, when the handle 432 is swung downward and is pressed on the lower part of the swinging positioning rod 44, the positioning of the swinging arms 41 after the upward swinging is realized, that is, the locking of the lateral contraction of the mulch film 6 is realized, further, the specific implementation of the swinging connecting rod 42 is that the swinging connecting rod 42 comprises a first connecting plate 421 and a tension spring 422, the upper end of the tension spring 422 is hung on the lower end of the corresponding first connecting plate 421, the other end of the tension spring 422 is hung on a hanging ring 411 of the corresponding swinging arm 41, and the upper part of the first connecting plate 421 is hingedly connected with the corresponding rotating connecting rod 431 or the supporting frame 1, in actual application, the first connecting plate 421 and the tension spring 422 are in hanging connection, so that they will not block the lateral movement of the swinging driving rod 43 to a certain extent, so that the handle 432 can be effectively and stably pressed on the lower part of the swinging positioning rod 44 by changing the position of the swinging driving rod 43.

[0026] In the film covering process, the first and second shrinkage pressure wheels 21 and 31 can adapt to the change of the longitudinal tension of the mulch film 6 by the telescopic property of the tension spring 422, thereby facilitating the continuous and effective film covering operation. In order to facilitate the effective combination of the mulch film roll and the shrinkage mechanism, a mulch film roll placing rack is arranged at the front of the support frame 1, and the mulch film roll placing rack is located above the front of the first support shaft 2. The mulch film roll placing rack includes a left support 51 and a right support 52, and the left support 51 and the right support 52 are arranged opposite to each other. A bearing is fixedly arranged on the upper part of the left support 51, and a support with a U-shaped groove is arranged on the upper part of the right support 52. The U-shaped groove can facilitate the installation and removal of the mulch film roll rotating shaft on the left support 51 and the right support 52.

[0027] The application also provides a rice dry direct seeding machine, which comprises the mulch film transverse shrinkage mechanism described above. In actual application, the support frame 1 in the mulch film transverse shrinkage mechanism is fixedly connected with the frame of the rice dry direct seeding machine, and the mulch film transverse shrinkage mechanism is located at the rear end of the rice dry direct seeding machine.

[0028] In the application, "upper", "lower", "front", "rear", "left" and "right" are relative positions for the convenience of describing the positional relationship, and therefore cannot be understood as absolute positions for limiting the protection scope.

[0029] In addition to the technical features described in the specification, all are known technologies of the professional technical personnel.

[0030] The preferred embodiments and examples of the application are described in detail above in combination with the drawings, but the application is not limited to the above-mentioned embodiments and examples. For ordinary technical personnel in the technical field, several improvements and modifications can be made without departing from the concept of the application, and these improvements and modifications should also be regarded as the protection scope of the application.

Claims

1. A lateral shrinkage mechanism for plastic film, characterized in that, The system includes a support frame, a first support shaft, and a second support shaft. Both the first and second support shafts are laterally mounted on the support frame, with the second support shaft located below and behind the first support shaft. The second support shaft can swing up and down relative to the first support shaft and be positioned accordingly. Several equally spaced first and second shrinking pressure rollers are respectively mounted on the first and second support shafts, with adjacent rollers arranged in a staggered pattern. When the second support shaft is at its upper swing limit, the distance between the axes of the first and second support shafts is less than the sum of the radii of the first and second shrinking pressure rollers. A swing support mechanism is mounted on the support frame to support and position the second support shaft. This mechanism includes swing arms, a swing connecting rod, a swing drive rod, and a swing positioning rod. Two swing arms are laterally hinged to each other at the lower part of the support frame. The two ends of the second support shaft are respectively fitted into bearings mounted on the swing arms. The swing drive rod is laterally rotatable at the upper part of the support frame. A rotating connecting rod and a hand are fixedly mounted at the left and right ends of the swing drive rod, respectively. The handle has a swing link on each of the two swing arms. The upper part of the swing link on the right side of the support frame is hinged to the support frame, and the lower part is movably connected to the corresponding swing arm. The upper part of the swing link on the left side of the support frame is hinged to the rotating link, and the lower part is movably connected to the corresponding swing arm. The swing positioning rod is located on the left side of the support frame and adjacent to the handle. When the handle swings downward and presses against the lower part of the swing positioning rod, the swing arm is positioned after swinging upward. The swing link includes a first connecting plate and a tension spring. The upper end is hung on the lower end of the corresponding first connecting plate, and the other end of the tension spring is hung on a hanging ring of the corresponding swing arm. The upper part of the first connecting plate is hinged to the corresponding rotating connecting rod or support frame. An auxiliary pressure roller is provided at each end of the first support shaft. The auxiliary pressure roller is composed of at least two first shrink pressure rollers arranged side by side. The first shrink pressure roller and the auxiliary pressure roller are fixedly mounted on the first support shaft, and the first support shaft is rotatably mounted on the support frame. The second shrink pressure roller is fixedly mounted on the second support shaft, and the second support shaft can rotate freely.

2. The lateral shrinkage mechanism for mulch film according to claim 1, characterized in that, The shrinking mechanism also includes a drive mechanism, which uses a chain drive to drive the rotation of the first support shaft.

3. The lateral shrinkage mechanism for mulch film according to claim 1, characterized in that, in A film roll placement rack is provided at the front of the support frame, and the film roll placement rack is located above and in front of the first support shaft. The film roll placement rack includes a left support and a right support, which are opposite to each other. A bearing is fixedly installed on the upper part of the left support, and a support with a U-shaped groove is installed on the upper part of the right support.

4. A dry-seeding rice direct seeding machine, characterized in that, Includes a lateral shrinkage mechanism for mulch film according to any one of claims 1-3.

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