Plug tray conveying device of transplanter

Abstract

The invention discloses a plug tray conveying device of a transplanter, belongs to the field of plug tray conveying devices, solves the problem that an existing driving mechanism is exposed in a severe environment to be used and is prone to abrasion, and adopts the technical scheme that the plug tray conveying device mainly comprises a transmission device and a driving device, and the transmission device comprises a chain wheel and a conveying chain; the driving device comprises a first driver and an output shaft in transmission connection with the chain wheel, the first driver is connected with a rocker arm, the rocker arm is connected with the output shaft through a one-way non-return bearing, a protruding block is arranged on the peripheral side of the rocker arm, the conveying device further comprises a limiting device, and the limiting device is provided with a first position and a second position. The limiting device limits the rotating angle of the rocker arm so that the conveying chain can move by the length of one hole. And when the limiting device is located at the second position, the limiting device relieves limitation on the rocker arm, so that the conveying chain moves by the length of two holes. The limiting device is mainly used for reducing abrasion between the limiting device and the rocker arm.

Description

Technical Field

[0001] The invention discloses a plug tray conveying device for a transplanter, and belongs to the technical field of plug tray conveying devices. Background Art

[0002] Transplanting seedlings using a transplanter's tray conveyor can reduce the seedling leakage rate, seedling injury rate, and labor intensity, and can also improve the seedling transplanting efficiency, thereby significantly reducing the seedling planting cost.

[0003] When the transplanter's plug tray conveying device is transporting seedlings, the conveying device drives the plug tray to move the distance of one plug position, so that the plug position of the plug tray is positioned at the clamping position of the conveying device for the clamping device to clamp the seedling. However, there is a gap of one plug position between two adjacent plug trays on the conveying device. Therefore, when one plug tray completes clamping the seedling, the conveying device needs to move the distance of two plug positions to achieve the purpose of skipping an empty plug position at the intersection of the two plug trays.

[0004] When the outer arc surface of the ratchet boss is separated from the locking block, the locking frame arm is reset, the locking block is stuck in the ratchet groove again, and the seedling delivery ratchet is locked. The seedling delivery chain belt and the seedling tray complete the movement of two unit steps, so that the seedling taking device can cross the edge gap of two adjacent seedling trays and realize seedling taking.

[0005] However, in the above-mentioned patent, since the use scenario of the conveying device is relatively harsh, and the ratchet friction pair is used in a harsh environment, mud and sand are easily attached between the ratchet pawls, which easily causes wear of the ratchet pawls, thereby causing the movement accuracy of the drive device to deteriorate, which will greatly reduce the service life of the drive device; in addition, the ratchet pawl drive device will produce greater impact and noise when working, which will reduce the user experience. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that the existing driving mechanism is easily worn when used in a harsh environment. To this end, a transplanter tray conveying device is provided, which can accurately control the movement stroke of the conveying device while reducing the wear between the limit device and the rocker arm.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A transplanter tray conveying device, the conveying device is provided with a transmission device for conveying the tray and a driving device for controlling the movement of the transmission device, the transmission device includes a sprocket and a conveying chain, the driving device drives the sprocket to rotate so that the conveying chain conveys the tray, the driving device includes a first driver and an output shaft connected to the sprocket transmission, the output end of the first driver is connected to a rocker arm, the rocker arm is connected to the output shaft through a one-way check bearing, a protrusion is provided on the outer peripheral side of the rocker arm, the conveying device also includes a limit device, the limit device has a first position and a second position, when the limit device is in the first position, the limit device limits the rotation angle of the rocker arm so that the conveying chain moves the length of one hole; when the limit device is in the second position, the limit device releases the restriction on the rocker arm so that the conveying chain moves the length of two holes.

[0009] The beneficial effects of adopting the present invention are:

[0010] The conveying device described in the present invention includes a driving device and a transmission device, the transmission device includes a sprocket and a conveying chain, the driving device includes a first driver and an output shaft, the first driver drives the sprocket to rotate through the output shaft to realize that the conveying chain drives the hole tray to move, when the limit device is in the first position, the limit device limits the rotation angle of the rocker arm, so that the conveying chain moves the stroke of one hole position, ensuring that the seedlings at each hole position on the hole tray can be smoothly clamped, and when one hole tray is clamped, the limit device switches to the second position. At this time, the limit device releases the restriction on the rocker arm, so that the rocker arm can rotate a larger angle, so that the conveying chain can move the stroke of two holes, and the conveying device can span the gap between the two hole trays to realize continuous seedling removal; in addition, the conveying device controls the conveying through the limit cooperation of the limit device and the rocker arm. The movement stroke of the conveying chain, the limit device and the rocker arm are mainly in abutment with each other, which can reduce the friction between the limit device and the rocker arm, so that the conveying device can better adapt to the working environment in the field, which helps to extend the service life of the conveying device; secondly, a one-way check bearing is provided between the rocker arm and the output shaft, so that the rocker arm drives the output shaft to rotate in only one direction, and the rocker arm rotates until it abuts against the limit device and then rotates in the opposite direction. At this time, the output shaft does not rotate with the rocker arm, thereby ensuring that the conveying chain always keeps running in the same direction; thirdly, the rocker arm and the limit device only come into contact when they abut, and the contact time is not long. Therefore, mud and sand are not allowed to adhere between the rocker arm and the limit device, which can reduce the possibility of wear of the rocker arm and the limit device, so that the conveying device can better adapt to the working environment in the field, which helps to improve the adaptability of the conveying device.

[0011] Preferably, the limiting device comprises a second driver and a limiting block, the second driver drives the limiting block to move closer to or away from the rocker arm, and when the limiting device is in the first position, the limiting block is close to the rocker arm, and the limiting block abuts against the protrusion to limit the rotation angle of the rocker arm.

[0012] Preferably, the output end of the second driver is provided with a connector, the second driver is hinged to the limit block through the connector, the conveying device is provided with a first positioning pin, the limit block is provided with a limit groove for sliding the first positioning pin, and the second driver drives the limit block to move so that the first positioning pin slides relative to the limit groove.

[0013] Preferably, the limiting device also includes a positioning block, and the conveying device is provided with a second positioning pin. One end of the positioning block is hinged to the second positioning pin, and the other end is hinged to the limiting block and the connecting head through the same hinge axis. The end of the second drive away from the connecting head is hinged to the conveying device. When the limiting device is in the first position, the limiting block and the positioning block remain flush.

[0014] Preferably, the limiting device further comprises a mounting seat, the mounting seat is fixed to the conveying device, and the second driver is hinged to the mounting seat.

[0015] Preferably, the frame is provided with two sets of sprockets and conveyor chains, the sprockets include a driving sprocket and a driven sprocket, the conveyor chain is sleeved on the driving sprocket and the driven sprocket, and a roller for placing the hole tray is provided between the two conveyor chains.

[0016] Preferably, the conveyor chain comprises a plurality of chain links connected to each other, some of the chain links are provided with outer chain plates, the outer chain plates are provided with at least one positioning hole, and both ends of the rollers are inserted into the positioning holes to fix the rollers to the conveyor chain.

[0017] Preferably, at least part of the outer link plates are provided with two positioning holes.

[0018] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of a plug tray conveying device for a transplanter of the present invention;

[0021] Figure 2 It is a side view of a transplanter plug tray conveying device of the present invention;

[0022] Figure 3 It is a side view of a transmission device in a transplanter plug tray conveying device of the present invention;

[0023] Figure 4 It is a schematic structural diagram of a limit device and a drive device in a plug tray conveying device of a transplanter according to the present invention;

[0024] Figure 5 It is a front view of a limiting device in a transplanter plug tray conveying device of the present invention when it is in a second position;

[0025] Figure 6 It is a structural schematic diagram of a stopper device in a transplanter plug tray conveying device of the present invention when it is in a first position;

[0026] Figure 7 The present invention is a front view of a limiting device in a transplanter tray conveying device when the limiting device is in a first position.

[0027] Figure numerals: 1, transmission device; 11, sprocket; 111, driving sprocket; 112, driven sprocket; 12, conveyor chain; 121, outer chain plate; 122, positioning hole; 21, first driver; 22, rocker arm; 221, protrusion; 222, check bearing; 23, mounting seat; 31, second driver; 311, connector; 32, limit block; 321, limit groove; 322, first positioning pin; 33, positioning block; 331, second positioning pin; 4, hole plate; 41, hole point; 42, groove. DETAILED DESCRIPTION

[0028] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figures 1 to 7 As shown, this embodiment shows a transplanter plug tray 4 conveying device, the conveying device is provided with a limit device, a transmission device 1 for conveying the plug tray 4 and a driving device for controlling the movement of the transmission device 1, wherein the transmission device 1 includes a sprocket 11 and a conveying chain 12, two sets of sprockets 11 and conveying chains 12 are provided on the frame, the sprocket 11 includes a driving sprocket 111 and a driven sprocket 112, the conveying chain 12 is sleeved on the driving sprocket 111 and the driven sprocket 112, a plurality of rollers for placing the plug tray 4 are provided between the two conveying chains 12, the driving device includes a first driver 21 and an output shaft drivingly connected to the driving sprocket 111, the output end of the first driver 21 is connected to a rocker arm 22, the rocker arm 22 is connected to the output shaft through a one-way check bearing 222, and in addition, in this embodiment, the first driver 21 is a cylinder, and the output end of the first driver 21 is connected to the rocker arm 22. The arm 22 is rotatably connected. After the first driver 21 is started, the output end of the first driver 21 extends out, thereby driving the rotation of the rocker arm 22. The inner ring and outer ring of the one-way check bearing 222 keep rotating synchronously in the direction of rotation, and then the rocker arm 22 can drive the output shaft to rotate, so that the sprocket 11 rotates, the sprocket 11 drives the conveyor chain 12 to move, and the roller moves with the conveyor chain 12 and drives the hole tray 4 to move; and in the process of retraction of the output end of the first driver 21, the first driver 21 drives the rocker arm 22 to rotate in the opposite direction. The inner ring and outer ring of the one-way check bearing 222 can rotate relatively in the direction of rotation, and then the output shaft does not rotate with the rocker arm 22. At this time, the sprocket 11 and the conveyor chain 12 remain stationary until the rocker arm 22 rotates to the initial position; the first driver 21 repeats the above movement so that the conveyor chain 12 always keeps running in the same direction, thereby realizing the conveying of the hole tray 4.

[0033] The limiting device in this embodiment has a first position and a second position. When the limiting device is in the first position, the limiting device limits the rotation angle of the rocker arm 22 so that the conveying chain 12 moves the length of one acupoint 41; when the limiting device is in the second position, the limiting device releases the restriction on the rocker arm 22 so that the conveying chain 12 moves the length of two acupoints 41.

[0034] The conveying device described in this embodiment includes a driving device and a transmission device. The transmission device 1 includes a sprocket 11 and a conveying chain 12. The driving device includes a first driver 21 and an output shaft. The first driver 21 drives the sprocket 11 to rotate through the output shaft to realize that the conveying chain 12 drives the hole tray 4 to move. When the limiting device is in the first position, the limiting device limits the rotation angle of the rocker arm 22 so that the conveying chain 12 moves the stroke of one hole 41 to ensure that the seedlings in each hole 41 on the hole tray 4 can be smoothly clamped. When a hole tray 4 is clamped, the limiting device switches to the second position. At this time, the limiting device releases the restriction on the rocker arm 22, so that the rocker arm 22 can rotate a larger angle, so that the conveying chain 12 can move the stroke of two holes 41, and the conveying device can span the gap between the two hole trays 4 to realize continuous seedling removal. In addition, the conveying device is limited by the limiting device and the rocker arm 22 In order to control the movement stroke of the conveying chain 12, the limit device and the rocker arm 22 are mainly in abutment with each other, which can reduce the friction between the limit device and the rocker arm 22, so that the conveying device can better adapt to the field working environment, which helps to extend the service life of the conveying device; secondly, a one-way check bearing 222 is provided between the rocker arm 22 and the output shaft, so that the rocker arm 22 drives the output shaft to rotate only in one direction, and the rocker arm 22 rotates until it abuts against the limit device and then rotates in the opposite direction. At this time, the output shaft does not rotate with the rocker arm 22, thereby ensuring that the conveying chain 12 always keeps running in the same direction; furthermore, the rocker arm 22 and the limit device only come into contact when they abut, and the contact time is not long. Therefore, no mud and sand are allowed to adhere between the rocker arm 22 and the limit device, which can reduce the possibility of wear of the rocker arm 22 and the limit device, so that the conveying device can better adapt to the field working environment, which helps to improve the adaptability of the conveying device.

[0035] The limiting device described in this embodiment includes a mounting seat 23, a second driver 31, a limiting block 32 and a positioning block 33, wherein the mounting seat 23 is fixed to the frame of the conveying device, and a connecting head 311 is provided at the output end of the second driver 31, and the second driver 31 is hinged to the limiting block 32 and the positioning block 33 through the connecting head 311, and the limiting block 32 and the positioning block 33 are hinged to the connecting head 311 through the same hinge axis, and the end of the second driver 31 away from the connecting head 311 is hinged to the mounting seat 23, and a first positioning pin 322 and a second positioning pin 331 are provided on the frame, wherein the second positioning pin 331 is hinged to the positioning block 33, and a limiting groove 321 for the first positioning pin 322 to slide is provided on the limiting block 32, and the second driver 31 drives the limiting block 32 to move so that the first positioning pin 322 slides relative to the limiting groove 321.

[0036] When the limit device is in the first position, the connector 311 of the second driver 31 rises to the top, and the positioning block 33 rotates around the connector 311 under the action of the connector 311 and the second positioning pin 331. The limit block 32 rotates around the connector 311 under the action of the connector 311 and the first positioning pin 322. At the same time, the first positioning pin 322 slides relative to the limit block 32 along the limit groove 321 until the limit block 32 and the positioning block 33 are kept flush. At this time, the end of the limit block 32 away from the connector 311 is closer to the rocker arm 22. In addition, the outer peripheral side of the rocker arm 22 is provided with a connection end and The output end of the first driver 21 is hinged with the connecting end of the rocker arm 22. After the first driver 21 is started, the output end of the first driver 21 extends out and drives the rocker arm 22 to rotate through the connecting end. During the rotation of the rocker arm 22, the end of the limit block 32 will abut against the protrusion 221, so that the output end of the first driver 21 cannot be fully extended, thereby limiting the rotation angle of the rocker arm 22, so that the conveying chain 12 drives the hole tray 4 to move a hole 41, so that the seedlings in each hole 41 can be clamped, thereby effectively reducing the possibility of missing seedlings and making the transplanting of seedlings more reliable.

[0037] After the seedlings of one hole tray 4 are clamped, there is a gap between two adjacent hole trays 4 in the conveying device. The length of the edge of the hole tray 4 and the gap is similar to the length of one hole position 41. In order to avoid the lack of seedlings in the subsequent process due to the clamping device clamping the empty hole, the conveying chain 12 needs to move the stroke of two holes positions 41 to cross the gap between the two adjacent hole trays 4 and realize normal seedling removal. In the present embodiment, after the seedlings of one hole tray 4 are clamped, the limiting device switches from the first position to the second position. During this process, the connecting head 311 of the second driver 31 descends, and the positioning block 33 rotates around the connecting head 311 under the action of the connecting head 311 and the second positioning pin 331. The limiting block 32 rotates around the connecting head 311 under the action of the connecting head 311 and the first positioning pin 322. At the same time, the first positioning pin 322 is relatively limited The block 32 slides along the limit groove 321, and the end of the limit block 32 away from the connecting head 311 gradually moves away from the rocker arm 22. At this time, the limit block 32 and the positioning block 33 are in a V shape; when the limit device is in the second position, the output end of the first driver 21 extends out and drives the rocker arm 22 to rotate through the connecting end. During the rotation of the rocker arm 22, the limit block 32 will not contact the protrusion 221. The limit device releases the restriction on the rocker arm 22, and then the output end of the first driver 21 can be fully extended so that the rotation angle of the rocker arm 22 reaches the maximum. At this time, the rocker arm 22 drives the output shaft to rotate, and the output shaft drives the conveying chain 12 to move through the active sprocket 111, and the conveying chain 12 drives the hole tray 4 to move the formation of two holes 41, thereby achieving the effect of spanning the gap between two adjacent hole trays 4 and realizing normal seedling removal to ensure the supply of transplanted seedlings.

[0038] It should be noted that in other embodiments, the limiting device may also only include a second driver 31 and a limiting block 32, and the limiting block 32 is fixed to the output end of the second driver 31, and the second driver 31 drives the limiting block 32 to approach the rocker arm 22 so that the limiting device reaches the first position, and the second driver 31 drives the limiting block 32 away from the rocker arm 22 so that the limiting device reaches the second position.

[0039] In addition, the hole tray 4 described in this embodiment is formed by arranging multiple hole positions 41, and the width of the hole positions 41 gradually decreases from top to bottom, so there is a groove 42 between two adjacent hole positions 41. After the hole tray 4 is placed on the conveying device, the roller is embedded in the groove 42, and multiple rollers are embedded in the bottom of a hole tray 4 so that the roller supports the hole tray 4. At the same time, two conveying chains 12 are fixed at both ends of the roller, and the roller drives the hole tray 4 to move with the movement of the conveying chain 12 to realize the conveying of the hole tray 4.

[0040] The conveying chain 12 described in the present embodiment is formed by a ring chain by splicing a plurality of chain links, and an outer chain plate 121 is provided on some of the chain links, and a positioning hole 122 for fixing the roller is provided on the outer chain plate 121. Since the spacing between the chain links is in English size, which is inconsistent with the spacing between the grooves 42 at the bottom of the hole tray 4, when the hole tray 4 is placed on the roller, the roller is prone to be unable to be completely embedded in the groove 42, resulting in the hole tray 4 being unable to be placed stably; and in the present embodiment, a positioning hole 122 is provided on some of the outer chain plates 121 of the conveying chain 12, and two positioning holes 122 are provided on another part of the outer chain plates 121, and the spacing between two adjacent outer chain plates 121 is not fixed. By equipping the outer chain plates 121 with non-fixed spacing and adjusting the positions of the positioning holes 122 of the rollers on the outer chain plates 121, the spacing between two adjacent rollers can be adjusted, so that the spacing between the rollers can match the spacing between the grooves 42 at the bottom of the hole tray 4 to a certain extent, so that the placement of the hole tray 4 can be more stable, which helps to improve the feeding accuracy of the conveying device.

[0041] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A transplanter plug tray conveying device, the conveying device is provided with a transmission device for conveying the plug tray and a driving device for controlling the movement of the transmission device, the transmission device includes a sprocket and a conveying chain, the driving device drives the sprocket to rotate so that the conveying chain conveys the plug tray, characterized in that: The driving device includes a first driver and an output shaft connected to the sprocket transmission. The output end of the first driver is connected to a rocker arm, which is connected to the output shaft through a one-way check bearing. A protrusion is provided on the outer peripheral side of the rocker arm. The conveying device also includes a limit device, which has a first position and a second position. When the limit device is in the first position, the limit device limits the rotation angle of the rocker arm so that the conveying chain moves a stroke of one acupoint; when the limit device is in the second position, the limit device releases the restriction on the rocker arm so that the conveying chain moves a stroke of two acupoints.

2. A transplanter tray conveying device according to claim 1, characterized in that: The limiting device includes a second driver and a limiting block. The second driver drives the limiting block to move closer to or away from the rocker arm. When the limiting device is in the first position, the limiting block is close to the rocker arm, and the limiting block abuts against the protrusion to limit the rotation angle of the rocker arm.

3. A transplanter tray conveying device according to claim 2, characterized in that: The output end of the second driver is provided with a connector, the second driver is hinged to the limit block through the connector, the conveying device is provided with a first positioning pin, the limit block is provided with a limit groove for the first positioning pin to slide, and the second driver drives the limit block to move so that the first positioning pin slides relative to the limit groove.

4. A transplanter tray conveying device according to claim 3, characterized in that: The limiting device also includes a positioning block, and the conveying device is provided with a second positioning pin. One end of the positioning block is hinged to the second positioning pin, and the other end is hinged to the limiting block and the connecting head through the same hinge axis. The end of the second drive away from the connecting head is hinged to the conveying device. When the limiting device is in the first position, the limiting block and the positioning block remain flush.

5. A transplanter tray conveying device according to claim 4, characterized in that: The limiting device also includes a mounting seat, which is fixed to the conveying device, and the second driver is hinged to the mounting seat.

6. The transplanter tray conveying device according to claim 1, characterized in that: The transmission device also includes a frame, on which two groups of sprockets and a conveying chain are arranged. The sprockets include a driving sprocket and a driven sprocket. The conveying chain is sleeved on the driving sprocket and the driven sprocket. A roller for placing a hole tray is arranged between the two conveying chains.

7. A transplanter tray conveying device according to claim 6, characterized in that: The conveyor chain comprises a plurality of chain links connected to each other, some of the chain links are provided with outer chain plates, the outer chain plates are provided with at least one positioning hole, and both ends of the rollers are inserted into the positioning holes to fix the rollers to the conveyor chain.

8. The transplanter tray conveying device according to claim 7, characterized in that: At least part of the outer link plates are provided with two positioning holes.

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