Transplanting mechanism for rice transplanter

Abstract

The utility model provides a transplanting mechanism of a rice transplanter, which comprises a rotary box, a transplanting arm group and a transplanting transmission box group, the rotary box comprises a box body and a rotary gear set arranged in the box body, the rotary gear set comprises a first gear, a backlash eliminating gear set and a transmission gear set, the backlash eliminating gear sets comprise the first backlash eliminating gear set and the second backlash eliminating gear set, and the first backlash eliminating gear set comprises a backlash eliminating gear, an intermediate gear and a backlash eliminating spring. According to the transplanting mechanism for the rice transplanter, the backlash eliminating gear set is meshed with the first gear and the transmission gear set at the same time, the problems of guide rail hitting and inconsistent seedling taking amount caused by shaking gaps are solved, and the transplanting mechanism is few in part variety, high in universality, high in strength and capable of saving space, reducing the design requirements for the number and specification of rotary box shells, and reducing the cost. Therefore, the cost of the add-drop structure is reduced.

Description

Technical Field

[0001] The utility model relates to the field of agricultural machinery, in particular to a transplanter mechanism for eliminating the seedling-taking gap. Background Art

[0002] In the existing rice transplanting technology, the transplanter mechanism is an important mechanism for a high-speed rice transplanter to achieve rice transplanting operations. The quality of rice transplanting is directly related to the transplanter mechanism. During the seedling-taking process, the transplanter mechanism must ensure no shaking gap, so as to ensure the accuracy and consistency of the seedling-taking amount, and prevent problems such as hitting the guide rail and inconsistent seedling-taking amount caused by the shaking gap of the transplanter mechanism. For the existing transplanter mechanism, in order to eliminate the shaking gap, the types of gears are increased or some other parts are added, the structure is relatively more complex, it does not have better versatility, occupies more space, and there are also problems such as insufficient structural strength.

[0003] Therefore, it is necessary to provide a transplanter mechanism to overcome the defects existing above. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a transplanter mechanism for a rice transplanter, which can be applied to the existing high-speed rice transplanter, and uses extremely few parts to improve and eliminate the seedling-taking gap of the transplanter mechanism.

[0005] According to one aspect of the utility model, a transplanter mechanism for a rice transplanter is provided, which includes a planting transmission box, a rotary box, and a planting arm group. The power is transmitted to the rotary box through the planting transmission box, so as to drive the planting arm group to perform rice transplanting operations.

[0006] The slewing box includes a box body and a slewing gear set disposed inside the box body and arranged in an upright posture. The slewing gear set includes: a first gear, a transmission gear set, and a backlash-eliminating gear set. The transmission gear set includes a first transmission gear and a second transmission gear symmetrically arranged at both ends of the first gear. The backlash-eliminating gear set includes a first backlash-eliminating gear set and a second backlash-eliminating gear set symmetrically arranged at both ends of the first gear. The first backlash-eliminating gear set is disposed between the first transmission gear and the first gear, and the second backlash-eliminating gear set is disposed between the second transmission gear and the first gear. The backlash-eliminating gear set is used to eliminate the clearance generated during the rotation of the slewing gear set. The first backlash-eliminating gear set includes a backlash-eliminating gear, an intermediate gear coaxially and adjacently arranged with the backlash-eliminating gear, and a backlash-eliminating spring disposed between the backlash-eliminating gear and the intermediate gear to connect the backlash-eliminating gear and the intermediate gear. The backlash-eliminating gear includes a first spring groove and a first spring hole provided on the end face of the backlash-eliminating gear. The intermediate gear has a second spring groove and a second spring hole provided on the end face of the intermediate gear. The backlash-eliminating spring is disposed in the first spring groove and the second spring groove, and both ends of the backlash-eliminating spring are respectively hung on the first spring hole and the second spring hole to connect the backlash-eliminating gear and the intermediate gear. Power is input through the first gear, and after passing through the backlash-eliminating gear set, the power is transmitted to the transmission gear set. The transmission gear set inputs the power transmitted by the first gear into the planting arm set, thereby driving the planting arm set to work. By designing a backlash-eliminating gear set in the slewing box, the purpose of eliminating backlash of the slewing box is achieved, and the shaking of the planting arm caused by the clearance generated by gear meshing is improved, thereby improving problems such as hitting the guide rail and inconsistent seedling taking amount caused thereby; the components of the solution have few types, strong versatility, high strength, save space, reduce the number of slewing box shells, reduce the complexity of the slewing box shell and the design requirements, thereby reducing the cost of the planting and separating structure.

[0007] Preferably, the second backlash-eliminating gear set has the same structure as the first backlash-eliminating gear set.

[0008] Preferably, the backlash-eliminating gear includes a first end face away from the intermediate gear and a second end face in contact with the intermediate gear. The first end face includes a first spring groove and a first step disposed in the first spring groove, and the first spring hole is disposed on the first step; the second end face includes a first spring groove and a second step disposed in the first spring groove, and the first spring hole is disposed relatively far from the second step on the second end face. Through this solution, it can be ensured that the backlash-eliminating spring has sufficient placement and space while increasing the strength of the backlash-eliminating gear.

[0009] Preferably, the intermediate gear includes a third end face in contact with the backlash-eliminating gear and a fourth end face away from the backlash-eliminating gear. The third end face includes a second spring groove, a third step placed in the second spring groove, and a fourth step placed in the second spring groove. The second spring hole is placed on the fourth step; the fourth end face includes a second spring groove and a fourth step placed in the second spring groove. This solution can ensure that the backlash-eliminating spring has sufficient space for placement and movement while increasing the strength of the intermediate gear.

[0010] Preferably, the gear axes of the backlash-eliminating gear and the intermediate gear are eccentrically arranged.

[0011] Preferably, the number of teeth and the module of the backlash-eliminating gear and the intermediate gear are the same.

[0012] Preferably, the box body includes a first box body and a second box body. The surface of the second box body that is buckled with the first box body has a glue storage groove for storing the glue when gluing the first box body and the second box body. When the first box body and the second box body are sealed, storing the glue through the glue storage groove can ensure the sufficiency of the glue when the first box body and the second box body are sealed, which helps to improve the sealing performance of the rotary box.

[0013] Preferably, the rotary box includes: a first rotary box and a second rotary box. The second rotary box body and the first rotary box are respectively located on both sides of the transplanting transmission box group. The box body of the first rotary box, the box body of the second rotary box, and the internal backlash-eliminating gear group are of a symmetrical structure. The rotary box body solution provided by this solution can enable a transplanter to only adopt two rotary box body structures, improve the versatility of the rotary box body, reduce the types of parts of the picking and inserting structure, and can effectively reduce the processing cost.

[0014] Preferably, a transplanter is characterized in that it includes at least two picking and inserting structures of this solution.

[0015] Preferably, the thickness h of the intermediate gear is greater than 6.8 mm, and the gear module is greater than 2.0. It can effectively improve the strength of the intermediate gear and enhance the reliability of the gear.

[0016] Preferably, the thickness h of the intermediate gear is 7 mm, and the gear module is 2.2. It can effectively improve the strength of the intermediate gear and enhance the reliability of the gear.

[0017] Preferably, the rotary box further includes a transmission gear shaft, a bearing, a welded transmission gear shaft, and a backlash-eliminating gear shaft.

[0018] Preferably, for a transplanter, the number of the picking and inserting mechanisms is greater than two.

[0019] The dividing and inserting mechanism of a transplanter provided by the utility model realizes the purpose of eliminating backlash in the rotary box by designing a backlash-eliminating gear set in the rotary box, improves the shaking of the inserting arm caused by the clearance generated by gear meshing, and thus improves problems such as hitting the guide rail and inconsistent seedling-taking amount caused thereby; the components of the scheme are few in type, strong in universality, high in strength, space-saving, reduce the number of rotary box shells, reduce the complexity of the rotary box shell and the design requirements, and thus reduce the cost of the dividing and inserting structure. Description of the Drawings

[0020] The following further elaborates on the present utility model in conjunction with the drawings and specific embodiments:

[0021] Figure 1 It is a three-dimensional schematic diagram of the transplanter;

[0022] Figure 2 It is a schematic diagram of the dividing and inserting mechanism;

[0023] Figure 3 It is a schematic diagram of the first rotary box;

[0024] Figure 4 It is a schematic diagram of the inside of the first rotary box body;

[0025] Figure 5 It is a schematic diagram of the backlash-eliminating gear set;

[0026] Figure 6 (a) is a front view of the backlash-eliminating gear;

[0027] Figure 6 (b) is a cross-sectional view of the backlash-eliminating gear along position A;

[0028] Figure 6 (c) is a rear view of the backlash-eliminating gear;

[0029] Figure 7 (a) is a front view of the intermediate gear;

[0030] Figure 7 (b) is a cross-sectional view of the intermediate gear along position B;

[0031] Figure 7 (c) is a rear view of the intermediate gear;

[0032] Figure 8 It is a schematic diagram of the box body.

[0033] Explanation of the reference numerals in the drawings:

[0034] 1. Inserting and separating mechanism; 10. Rotary box; 11. Planting arm group; 12. Planting transmission box group; 10a. First rotary box; 10b. Second rotary box; 101. Transmission gear group; 101A. First transmission gear; 101B. Second transmission gear; 102. Backlash-eliminating gear group; 102A. First backlash-eliminating gear group; 102B. Second backlash-eliminating gear group; 102a. Backlash-eliminating gear; 102b. Intermediate gear; 102c. Backlash-eliminating spring; 102d. First spring groove; 102e. First spring hole; 102f. Second spring groove; 102g. Second spring hole; 103. First gear; 104. Transmission gear shaft; 105. Welded transmission gear shaft; 106. Bearing; 107a. First box body; 107b. Second box body; 1021a. First end face; 1021b. Third end face; 1022a. Second end face; 1022b. Fourth end face; 1021d. First step; 1022d. Second step; 1021f. Third step; 1022f. Fourth step; 1071. Glue storage groove. Detailed implementation mode

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] To make the drawings concise, only the parts related to the present invention are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, parts with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation.

[0037] Based on the drawings, the implementation modes for implementing this solution are described. It should be noted that in the following description, the direction along the straight line F is set as "the front in the forward direction" (refer to Figure 1 ), the direction along the straight line B is set as "the rear in the forward direction" (refer to Figure 1 ), the direction along the straight line L is set as "the left side" (refer to Figure 1 ), and the direction along the straight line R is set as "the right side" (refer to Figure 1 ).

[0038] It should be further understood that the term "and / or" used in the specification and claims of this application refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0039] In this text, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific situations.

[0040] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0041] In order to more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the following will describe the specific implementation manners of this utility model with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of this utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other implementation manners can also be obtained.

[0042] See Figure 1 , this embodiment exemplarily provides a structure of a rice transplanter, including a separating and inserting mechanism, a transmission system, a supporting part, and an operating part. The power of the transmission system is input into the separating and inserting mechanism through the operation of the operating part, so as to perform the rice transplanting operation.

[0043] See Figure 2 , this embodiment provides a separating and inserting mechanism of a rice transplanter, including a planting transmission box, a rotary box, and a planting arm group. The planting transmission box is used to transmit power to the rotary box, so as to drive the planting arm group to perform the rice transplanting operation.

[0044] Embodiment 1

[0045] See Figures 2 to 5, this embodiment provides an inserting and extracting mechanism, including a box body 107 and a rotary gear set disposed inside the box body and arranged vertically. The rotary gear set includes a first gear 103, a transmission gear set 101, and a backlash-eliminating gear set 102. The transmission gear set 101 further includes a first transmission gear 101A and a second transmission gear 101B. The backlash-eliminating gear set 102 further includes a first backlash-eliminating gear set 102A and a second backlash-eliminating gear set 102B. The first backlash-eliminating gear set 102A is disposed between the first transmission gear 101A and the first gear 103 and meshes with the first gear 103 and the first transmission gear 101A respectively. The second backlash-eliminating gear set 102B is disposed between the second transmission gear 101B and the first gear 103 and meshes with the first gear 103 and the second transmission gear 101B respectively. When the first gear 103 rotates, it drives the first backlash-eliminating gear set 102A to rotate. When the backlash-eliminating gear set 102 rotates, it drives the transmission gear set 101 to rotate, thereby transmitting the power of the first gear 103 to the transmission gear set 101. The backlash-eliminating gear set 102 is used to eliminate the clearance generated when the rotary gear set rotates.

[0046] The first backlash-eliminating gear set 102A includes a backlash-eliminating gear 102a, an intermediate gear 102b, and a backlash-eliminating spring 102c. The backlash-eliminating gear 102a includes a first spring groove 102d and a first spring hole 102e provided on the end face of the backlash-eliminating gear. The intermediate gear has a second spring groove 102f and a second spring hole 102g provided on the end face of the intermediate gear. The backlash-eliminating gear 102a and the intermediate gear 102b are coaxial and their end faces are in contact. The backlash-eliminating spring 102c is placed in the first spring groove 102d and the second spring groove 102e. Both ends of the backlash-eliminating spring 102c are respectively hung on the first spring hole 102d and the second spring hole 102e. When the rotary gear set rotates, under the action of the backlash-eliminating spring 102c, the contact force between the two mutually contacting end faces of the backlash-eliminating gear 102a and the intermediate gear 102b is increased. Due to the pulling force of the backlash-eliminating spring 102c, the backlash-eliminating gear 102a and the intermediate gear 102b are misaligned with each other, so that the backlash-eliminating gear set 102 can always mesh with the first gear 103 and the transmission gear set 101 during the rotation of the gear set, eliminating the clearance between the gear sets.

[0047] The tooth clearance elimination mechanism of a transplanter given in this embodiment, under the action of the tooth clearance elimination spring 102c, while increasing the contact force between the mutually contacting surfaces of the tooth clearance elimination gear 102a and the intermediate gear 102b, when the gear set in the swing box 10 rotates, due to the pulling force of the tooth clearance elimination spring 102c, the tooth clearance elimination gear 102a and the intermediate gear 102b are displaced relative to each other, so as to ensure that the tooth clearance elimination gear 102a in the gear set can always mesh with the first gear 103 and the transmission gear 101 during the rotation of the gear set, thereby eliminating the clearance between the gear sets. Since the clearance caused by the gears is transmitted to the planting arm set 11, and then from the planting arm set 11 to the seedling taking position, this clearance will be further amplified, resulting in problems such as inconsistent seedling taking amount or rail hitting. Therefore, through this embodiment, the clearance between the gears can be eliminated, thereby improving problems such as rail hitting and inconsistent seedling taking amount caused thereby.

[0048] Embodiment 2

[0049] As Figure 4 shown, on the basis of Embodiment 1, this embodiment provides a second tooth clearance elimination gear set 102B, and the second tooth clearance elimination gear set 102B has the same structure as the first tooth clearance elimination gear set 102A.

[0050] Embodiment 3

[0051] As Figure 6 shown, on the basis of Embodiment 1, this embodiment provides a tooth clearance elimination gear 102a, which includes a first end face 1021a away from the intermediate gear 102b and a second end face 1022a attached to the intermediate gear 102b. The first end face 1021a includes a first spring groove 102d and a first step 1021d placed in the first spring groove 102d, and a first spring hole 102e is placed on the first step 1021d; the second end face 1022a includes a first spring groove 102d and a second step 1022d placed in the first spring groove 102d, and the first spring hole 102e is placed on the second end face 1022a relatively far away from the second step 1022d. Through this solution, it can be ensured that the tooth clearance elimination spring 102c has sufficient placement space while increasing the strength of the tooth clearance elimination gear 102a.

[0052] Embodiment 4

[0053] See Figure 7, on the basis of Embodiment 1, this embodiment provides an intermediate gear 102b, which includes a third end face 1021b that fits with the backlash-eliminating gear 102a and a fourth end face 1022b that is away from the backlash-eliminating gear 102a. The third end face 1021b includes a second spring groove 102f, a third step 1021f placed in the second spring groove 102f, and a fourth step 1022f placed in the second spring groove 102f. A second spring hole 102g is placed on the fourth step 1022f; the fourth end face 1022b includes a second spring groove 102f and a fourth step 1022f placed in the second spring groove 102f.

[0054] Embodiment 5

[0055] See Figure 7 , on the basis of Embodiment 4, this embodiment provides a backlash-eliminating gear and an intermediate gear, and the gear axes of the backlash-eliminating gear and the intermediate gear are eccentrically arranged.

[0056] Embodiment 6

[0057] See Figures 6 to 8 , on the basis of Embodiment 5, this embodiment provides a rotary box, and the number of teeth and the module of the backlash-eliminating gear and the intermediate gear in it are the same.

[0058] The box body includes a first box body and a second box body. The surface of the second box body that is fastened to the first box body has a glue storage groove for storing the glue when gluing the first box body and the second box body. When the first box body and the second box body are sealed, storing the glue through the glue storage groove can ensure the sufficiency of the glue when the first box body and the second box body are sealed, which helps to improve the sealing performance of the rotary box.

[0059] The rotary box includes a first rotary box and a second rotary box. The second rotary box body and the first rotary box are respectively located on both sides of the transplanting transmission box group. The box bodies of the second rotary box and the first rotary box and the internal backlash-eliminating gear groups are symmetrical structures. The rotary box body solution provided by this scheme can enable a transplanter to only adopt two types of rotary box structures, improve the versatility of the rotary box body, reduce the types of parts of the sub-insertion structure, and can effectively reduce the processing cost.

[0060] The thickness h of the intermediate gear 102b is greater than 6.8 mm, and the gear module is greater than 2.0. Further, the thickness h of the intermediate gear 102b is 7 mm, and the gear module is 2.2. It can effectively improve the strength of the intermediate gear 102b and enhance the reliability of the gear.

[0061] The rotary box 10 further includes a transmission gear 101 shaft, a bearing 106, a welded transmission gear 101 shaft, and a backlash-eliminating gear shaft.

[0062] See Figure 1, an exemplary rice transplanter structure is given. The number of the metering and planting mechanisms is greater than two. Specifically, the number of the metering and planting mechanisms is three.

[0063] Exemplarily, when the present solution is working, the transmission system delivers power to the planting transmission box of the metering and planting structure, driving the first gear 103 of the rotary box 10 to rotate. The first gear 103 drives the backlash-eliminating gear set 102a of 102, further driving the transmission gear 101 to rotate. The transmission gear 101 drives the planting arm group 11 to perform the rice transplanting operation. One end of the backlash-eliminating spring 102c is hung in the first spring hole 102e, and the other end of the backlash-eliminating spring 102c is hung in the second spring hole 102g. By the acting force of the backlash-eliminating spring 102c, while increasing the contact force between the two mutually contacting surfaces of the backlash-eliminating gear 102a and the intermediate gear 102b, when the rotary gear set rotates, due to the pulling force of the backlash-eliminating spring 102c, the backlash-eliminating gear 102a and the intermediate gear 102b are mutually displaced, so as to ensure that the backlash-eliminating gear set 102 can always mesh with the first gear 103 and the transmission gear 101 during the gear rotation process, thereby eliminating the gap between the gears. Since the gap caused by the transmission gear set is transmitted to the planting arm, the gap will be further amplified at the seedling-taking position of the planting arm, resulting in problems such as inconsistent seedling-taking amount or rail hitting. Therefore, through this embodiment, the gap between the gears can be eliminated, thereby improving problems such as rail hitting and inconsistent seedling-taking amount caused thereby.

[0064] It will be obvious to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention falling within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A transplanting mechanism for a rice transplanter, with the forward direction of the rice transplanter as the front, characterized in that: The insert / drop mechanism comprises: Transmission box for planting; A rotary box, wherein the length direction of the rotary box is arranged along the front-rear direction, and the planting transmission box transmits power to the rotary box; A planting arm group, wherein the planting arm group performs a rice planting operation under the drive of the rotary box; The rotary box includes a box body and a rotary gear set disposed inside the box body and arranged in an upright posture, and the rotary gear set includes: A first gear, the first gear is used to input power; A transmission gear set, the transmission gear set comprising a first transmission gear and a second transmission gear symmetrically arranged at both ends of the first gear, the transmission gear set being used to input the power transmitted by the first gear into the planting arm set, thereby driving the planting arm set to work; A backlash-eliminating gear set, the backlash-eliminating gear set comprising a first backlash-eliminating gear set and a second backlash-eliminating gear set symmetrically arranged at both ends of the first gear, the first backlash-eliminating gear set being arranged between the first transmission gear and the first gear, the second backlash-eliminating gear set being arranged between the second transmission gear and the first gear, the backlash-eliminating gear set being used to eliminate the gap generated when the rotating gear sets rotate; The first backlash eliminating gear set includes a backlash eliminating gear, an intermediate gear coaxial with and adjacent to the backlash eliminating gear, and an anti-backlash spring disposed between the backlash eliminating gear and the intermediate gear for connecting the backlash eliminating gear with the intermediate gear. The backlash eliminating gear includes a first spring groove and a first spring hole disposed on the end face of the backlash eliminating gear, the intermediate gear includes a second spring groove and a second spring hole disposed on the end face of the intermediate gear, the backlash eliminating spring is disposed in the first spring groove and the second spring groove, and both ends of the backlash eliminating spring are respectively hung on the first spring hole and the second spring hole to connect the backlash eliminating gear with the intermediate gear.

2. A transplanting mechanism for a rice transplanter according to claim 1, characterized in that: The second backlash-eliminating gear set has the same structure as the first backlash-eliminating gear set.

3. A transplanting mechanism for a rice transplanter according to claim 1, characterized in that: The backlash eliminating gear includes a first end face away from the intermediate gear and a second end face in contact with the intermediate gear, the first end face includes the first spring groove and a first step disposed in the first spring groove, and the first spring hole is disposed on the first step; the second end face includes the first spring groove and a second step disposed in the first spring groove, and the first spring hole is disposed on the second end face relatively away from the second step.

4. A transplanting mechanism for a rice transplanter according to claim 1, characterized in that: The intermediate gear includes a third end face that is in contact with the anti-backlash gear and a fourth end face that is away from the anti-backlash gear. The third end face includes the second spring groove, a third step disposed in the second spring groove, and a fourth step disposed in the second spring groove. The second spring hole is disposed on the fourth step. The fourth end face includes the second spring groove and a fourth step disposed in the second spring groove.

5. A transplanting mechanism for a rice transplanter as claimed in claim 3 or 4, characterized in that: The gear shaft centers of the backlash-eliminating gear and the intermediate gear are eccentrically arranged.

6. A transplanting mechanism for a rice transplanter as claimed in claim 5, characterized in that: The backlash-eliminating gear has the same number of gear teeth and gear module as the intermediate gear.

7. A transplanting mechanism for a rice transplanter as claimed in claim 6, characterized in that: The box body comprises a first box body and a second box body, and a surface of the second box body that is buckled with the first box body is provided with a glue storage groove for storing glue when gluing the first box body and the second box body.

8. A transplanting mechanism for a rice transplanter as claimed in claim 7, characterized in that: The rotary box includes a first rotary box and a second rotary box. The first rotary box and the second rotary box body are respectively located on both sides of the planting transmission box group. The box bodies of the first rotary box and the second rotary box and the backlash-eliminating gear group are symmetrical structures.

9. A rice transplanter, characterized in that: The invention comprises at least two transplanting structures for a rice seedling machine as described in claim 1 or claim 8.

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