Auxiliary seedling conveying mechanism of a seedling transplanting machine

Abstract

This invention relates to an auxiliary seedling delivery mechanism for a seedling transplanter, comprising: a support frame; an active roller rotatably mounted on the support frame and driven by a drive assembly; a driven roller mounted on the support frame; a synchronous belt rotatably wound between the active and driven rollers, the linear speed of the synchronous belt being less than that of the conveyor belt; and several pressing parts disposed on the outer surface of the synchronous belt. In this design, the active and driven rollers are positioned on the support frame, with a rotating synchronous belt tensioned between them. The synchronous belt has pressing parts that act on the outer side of the seedling, while the conveyor belt acts on the inner side. A speed difference exists between the conveyor belt and the synchronous belt, and their rotation directions are opposite. The linear speed of the synchronous belt is less than that of the conveyor belt. This ensures that when the seedling is moved to the bottom of the seedling box, it remains flat on the seedling box, and the longitudinal spacing of the seedlings does not change, facilitating seedling removal by the planting arm.

Description

Technical Field

[0001] This invention relates to a blanket seedling transplanter, and more particularly to an auxiliary seedling delivery mechanism for a blanket seedling transplanter. Background Technology

[0002] The blanket seedling transplanter places the blanket-shaped seedlings on an inclined seedling box, and the conveyor belt rotates to send the blanket-shaped seedlings to the bottom of the seedling box, where they are picked up by the planting arm; in the Chinese patent with publication number CN116034687A, the blanket seedlings are placed on the seedling box and pressed down by the seedling frame.

[0003] When the seedlings on the mat are subjected to gravity and the friction of the conveyor belt, they will bend when they come into contact with the bottom of the seedling box. This will cause the longitudinal spacing of the seedlings on the mat to change. For example, the longitudinal spacing of the seedlings at the bottom of the seedling box will be reduced from 20mm to 18mm. When the seedlings are picked up by the planting arm, the end of the planting arm will directly act on the seedlings, damaging the seedlings themselves.

[0004] In summary, ensuring that the seedlings slide smoothly onto the seedbed without changing the longitudinal spacing between them has become an urgent problem for researchers in this field. Summary of the Invention

[0005] The technical problem to be solved by this invention is: how to ensure that the seedlings slide flat on the seedbed and that the longitudinal spacing between the seedlings does not change.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] This invention relates to an auxiliary seedling delivery mechanism for a seedling transplanter. The mechanism is fixed to a seedling box and forms a delivery gap with the conveyor belt of the seedling box. It includes: a support frame with its two sides fixedly connected to the two sides of the seedling box; a drive roller rotatably mounted on the support frame and driven by a drive assembly; a driven roller mounted on the support frame; a synchronous belt rotatably wound between the drive roller and the driven roller, the linear velocity of the synchronous belt being less than that of the conveyor belt; and several pressing parts disposed on the outer surface of the synchronous belt, adapted to apply pressure to the seedlings in the delivery gap.

[0008] Unlike traditional seedling racks that compress seedlings, this solution uses active and driven rollers placed on a support frame with a gap between the support frame and the seedling box. A synchronous belt with rotating motion is tensioned between the active and driven rollers. The synchronous belt has a pressing part that acts on the outside of the seedlings, while the conveyor belt acts on the inside. The conveyor belt and the synchronous belt have a speed difference and rotate in opposite directions. The linear speed of the synchronous belt is less than that of the conveyor belt. This ensures that when the seedlings move to the bottom of the seedling box, they remain flat on the seedling box, and the longitudinal spacing of the seedlings does not change, making it easy for the planting arm to pick up the seedlings.

[0009] To demonstrate that a synchronous belt is always tensioned between the driving roller and the driven roller, the present invention employs floating holes at opposite positions on both sides of the support frame; both ends of the driven roller are located within the floating holes, and an elastic element is provided, one end of which is connected to the side of the support frame, and the other end of which is connected to the end of the driven roller within the floating hole.

[0010] The driven roller end is placed in the floating hole and is tightened by the elastic element. By setting the elastic element and the floating hole, the position of the driven roller can be adjusted, and the synchronous belt can always be tensioned between the driven roller and the driving roller.

[0011] To illustrate the specific structure of the drive assembly, the present invention uses the drive assembly comprising: a first motor fixed to one side of the support frame, the output end of which is connected to the end of the drive roller;

[0012] The first motor directly drives the drive roller, thereby adjusting the speed of the synchronous belt to be less than that of the conveyor belt.

[0013] To illustrate another structure of the drive assembly, the present invention uses a drive assembly comprising: a first gear fixed to one end of the drive roller; a double tooth, the smaller diameter portion of which meshes with the first gear; a second gear, which is connected to a rotating shaft at the conveyor belt; and a chain wound between the larger diameter portion of the double tooth and the second gear.

[0014] The rotation of the conveyor belt is achieved by the second motor controlling the rotating shaft. The rotating shaft transmits power through the second gear, chain, double gear, and first gear to achieve the rotation of the drive roller. Compared with the above-mentioned drive components, the drive mechanism provided by this solution saves one motor and has a lower cost.

[0015] To illustrate the specific structure of the pressing part, the present invention uses the pressing part comprising: a first elastic bar with a long strip structure, the length of the first elastic bar being greater than the seedling feeding gap;

[0016] One end of the first elastic bar is connected to the timing belt, and the other end is a free end. Utilizing the elasticity of the first elastic bar, it can compress the seedlings.

[0017] To provide an alternative structure for the clamping part, the present invention employs a clamping part comprising: a second elastic bar with a U-shaped structure, both ends of which are connected to the synchronous belt, and the distance between the two ends of the second elastic bar is greater than the diameter of the drive roller;

[0018] When the first elastic bar moves to the bottom of the synchronous belt and detaches from the seedbed, it releases its elastic force and acts on the planting arm, affecting the accuracy of the planting arm's seedling bending. In this solution, the second elastic bar has a U-shaped structure. When the second elastic bar moves to the bottom of the synchronous belt, one end is located on the side of the synchronous belt and the other end is located on the outer side of the synchronous belt. In this way, the curved part of the second elastic bar will be close to the drive roller, reducing the overall height of the second elastic bar, that is, it will not act on the planting arm, thus avoiding affecting the accuracy of the planting arm in picking up seedlings.

[0019] The beneficial effects of this invention: This invention is an auxiliary seedling delivery mechanism for a seedling transplanter. This solution uses an active roller and a driven roller placed on a support frame, with a gap between the support frame and the seedling box. A synchronous belt with rotary motion is tensioned between the active roller and the driven roller. The synchronous belt is provided with a pressing part, which acts on the outside of the seedling and the conveyor belt acts on the inside of the seedling. A speed difference is formed between the conveyor belt and the synchronous belt, and the rotation directions of the conveyor belt and the synchronous belt are opposite. The linear speed of the synchronous belt is less than that of the conveyor belt. In this way, when the seedling moves to the bottom of the seedling box, the seedling is always kept flat on the seedling box, and the longitudinal spacing of the seedlings does not change, which facilitates the planting arm to pick up the seedlings. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a front view of the structure of Example 1;

[0022] Figure 2 This is a schematic diagram of the rear structure of Example 1;

[0023] Figure 3 This is a structural schematic diagram of Example 2;

[0024] Figure 4 This is a schematic diagram of the structure in Example 2 where the pressing part moves to the bottom of the synchronous belt. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0026] Example 1

[0027] like Figure 1-2As shown, this invention is an auxiliary seedling delivery mechanism for a seedling transplanter. It is fixed to a seedling box 1 and forms a delivery gap with the conveyor belt 2 of the seedling box 1. The mechanism includes: a support frame 3, whose two sides are fixedly connected to the two sides of the seedling box 1; a drive roller 4, rotatably mounted on the support frame 3 and driven by a drive assembly; a driven roller 5, mounted on the support frame 3; a synchronous belt 6, rotating between the drive roller 4 and the driven roller 5, the linear velocity of the synchronous belt 6 being less than the linear velocity of the conveyor belt 2; and several pressing parts disposed on the outer surface of the synchronous belt 6, adapted to apply pressure to the seedlings in the delivery gap.

[0028] Unlike the traditional method of pressing the seedlings with a seedling rack, Example 1 uses an active roller 4 and a driven roller 5 placed on a support frame 3. There is a gap between the support frame 3 and the seedling box 1. A synchronous belt 6 with a rotary motion is tensioned between the active roller 4 and the driven roller 5. The synchronous belt 6 is equipped with a pressing part, which acts on the outside of the seedlings and the conveyor belt 2 acts on the inside of the seedlings. The conveyor belt 2 and the synchronous belt 6 form a differential speed, and the rotation directions of the conveyor belt 2 and the synchronous belt 6 are opposite. The linear speed of the synchronous belt 6 is less than the linear speed of the conveyor belt 2. In this way, when the seedlings move to the bottom of the seedling box 1, the seedlings are always kept flat on the seedling box 1, and the longitudinal spacing of the seedlings does not change, which makes it easy for the planting arm to pick up the seedlings.

[0029] To demonstrate that a synchronous belt is always tensioned between the driving roller and the driven roller, the present invention employs floating holes on both sides of the support frame 3 at opposite positions; both ends of the driven roller 5 are located in the floating holes; one end of the elastic element 7 is connected to the side of the support frame 3, and the other end is connected to the end of the driven roller 5 in the floating hole.

[0030] The driven roller 5 is placed in the floating hole and is tightened by the elastic element 7. By setting the elastic element 7 and the floating hole, the position of the driven roller 5 can be adjusted, and the synchronous belt 6 can always be tensioned between the driven roller 5 and the driving roller 4.

[0031] To illustrate the specific structure of the drive assembly, the present invention uses the drive assembly comprising: a first gear 8 fixed to one end of the drive roller 4; a double tooth 9, the small diameter portion of which meshes with the first gear 8; a second gear 10, which is connected to the rotating shaft 11 at the conveyor belt 2; and a chain 12, which is wound between the large diameter portion of the double tooth 9 and the second gear 10.

[0032] The rotation of the conveyor belt 2 is achieved by the second motor controlling the rotating shaft 11. The rotating shaft 11 transmits power through the second gear 10, chain 12, double gear 9, and first gear 8 to achieve the rotation of the drive roller 4.

[0033] To illustrate the specific structure of the pressing part, the present invention uses the pressing part comprising: a first elastic bar 13 of elongated structure, wherein the length of the first elastic bar 13 is greater than the seedling feeding gap.

[0034] One end of the first elastic bar 13 is connected to the synchronous belt 6, and the other end is a free end. Utilizing the elasticity of the first elastic bar 13, the first elastic bar 13 can compress the seedlings.

[0035] Example 2

[0036] like Figure 3 As shown, the drive assembly and pressing part in Embodiment 1 are replaced, while the rest remain unchanged. Specifically, in order to illustrate the specific structure of the drive assembly, the drive assembly of the present invention includes: a first motor 14 fixed on one side of the support frame 3, the output end of which is connected to the end of the drive roller 4.

[0037] The first motor 14 directly drives the drive roller 4, thereby adjusting the speed of the synchronous belt 6 to be less than the speed of the conveyor belt 2.

[0038] To provide an alternative structure for the clamping part, the present invention employs a clamping part comprising: a second elastic bar 15 with a U-shaped structure, both ends of the second elastic bar 15 being connected to the synchronous belt 6, and the distance between the two ends of the second elastic bar 15 being greater than the diameter of the drive roller 4;

[0039] In Example 1, when the first elastic bar 13 moves to the bottom of the synchronous belt and detaches from the seedbed, the first elastic bar 13 releases its elastic force. The first elastic bar 13 then acts on the planting arm, affecting the precision of the planting arm's bending. Figure 4 As shown, in embodiment 2, the second elastic bar 15 has a U-shaped structure. The second elastic bar 15 moves to the bottom of the synchronous belt 6, with one end located on the side of the synchronous belt 6 and the other end located on the outer side of the synchronous belt 6. In this way, the arc-shaped part of the second elastic bar 15 will be close to the active roller 4, reducing the overall height of the second elastic bar 15, that is, it will not act on the planting arm, thus avoiding affecting the seedling picking accuracy of the planting arm.

[0040] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An auxiliary seedling delivery mechanism for a seedling transplanter, which is fixed on a seedling box and forms a seedling delivery gap with the conveyor belt of the seedling box, characterized in that, include: A support frame, whose two sides are fixedly connected to the two sides of the seedling box; The active roller is rotatably mounted on the support frame and is driven to rotate by a drive assembly. The driven roller is mounted on the support frame; A synchronous belt is rotatably wound between the driving roller and the driven roller. The linear velocity of the synchronous belt is less than that of the conveyor belt, and the conveyor belt and the synchronous belt rotate in opposite directions. Several pressing parts are provided on the outer surface of the synchronous belt, which are adapted to apply pressure to the seedlings at the seedling feeding gap, so as to keep the seedlings flat on the seedling box and the longitudinal spacing of the seedlings does not change.

2. The auxiliary seedling delivery mechanism for a seedling transplanter according to claim 1, characterized in that, Floating holes are provided on both sides of the support frame at opposite positions; Both ends of the driven roller are located within the floating hole; An elastic element, one end of which is connected to the side of the support frame, and the other end of which is connected to the end of the driven roller in the floating hole.

3. The auxiliary seedling delivery mechanism for a seedling transplanter according to claim 1, characterized in that, The driving component includes: A first motor fixed to one side of the support frame has its output end connected to the end of the drive roller.

4. The auxiliary seedling delivery mechanism for a seedling transplanter according to claim 1, characterized in that, The driving component includes: A first gear fixed at one end of the drive roller; The double gear has its smaller diameter portion meshing with the first gear. The second gear is connected to the rotating shaft at the conveyor belt; A chain, which is wound between the large diameter portion of the double-toothed gear and the second gear.

5. The auxiliary seedling delivery mechanism for a seedling transplanter according to claim 1, characterized in that, The pressing part includes: a first elastic bar with a long strip structure, the length of which is greater than the seedling feeding gap.

6. The auxiliary seedling delivery mechanism for a seedling transplanter according to claim 1, characterized in that, The clamping part includes a second elastic bar with a U-shaped structure, both ends of which are connected to the synchronous belt, and the distance between the two ends of the second elastic bar is greater than the diameter of the drive roller.

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