WO2008049306A1

WO2008049306A1 - A rotary transplanting mechanism of walking seedling transplanter

Info

Publication number: WO2008049306A1
Application number: PCT/CN2007/002512
Authority: WO
Inventors: Yun Zhao; Gaohong Yu; Chuanyu Wu; Liang Sun; Xiong Zhao; Ge Li
Original assignee: Zhejiang Sci-Tech University
Priority date: 2006-10-26
Filing date: 2007-08-20
Publication date: 2008-05-02
Also published as: CN1943299A

Abstract

A rotary transplanting mechanism of walking seedling transplanter. A central sprocket (3) in sprocket box (4) drives left/right gear boxes (5, 5') fixed to the two ends of central shaft (1). Fixed central gear (14, 14') meshes planetary gears (6, 6') fixed to planetary shaft (7, 7') by intermediate gears (11, 11', 13, 13') and planetary gears rotate with unequal speed relatively to gear box. A planting arm (8, 8') is fixed to an end of planetary shaft outside the said gear box, and its absolute motion is synthetic motion of unequal speed rotation of planetary gears relatively to gear box and circumferential motion of gear box relatively to shaft. The gear box is rotated through one cycle, and can make planting arms operating by once. So the said invention can be fitted for working frequency of walking seedling transplanter. Seen from side, the axes A, B, C of the planetary gear train are formed into acute angle of triangle. By optimizing structure parameters, the claws of the planting arms can travel along a path that meets the requirements of getting seedling of the claws, the angle of planting and relatively traveling path, thereby that can ensure small planting holes, reduce falling seedling and floating seedling.

Description

Rotary add-drop mechanism of walking type rice transplanter

The present invention relates to agricultural machinery, and more particularly to a rotary add/drop mechanism of a walking type rice transplanter. Background technique

At present, there are two main types of rice transplanting machines sold on the market: a crank-and-swing type plug-in mechanism and a rotary add-drop mechanism. The crank rocker type insertion and insertion mechanism can change the relative movement track of the claw by changing the center of the crank rotation and the swing center position of the rocker, and when the relative movement track is "waist shape", it is used for the rider; when it is relatively moved When the track is "dolphin shape", it is used for the walking transplanter.

The rotary add/drop mechanism is a slewing gear box provided with a fixing member and rotatably supported around the central axis with respect to the fixing member, and is axially centered on a first axis parallel to the central axis and is opposite to the aforementioned slewing gear a relatively rotating support shaft of the cartridge, a pawl support body integrally rotating with respect to the slewing gear cartridge and the support shaft, a pawl provided on the pawl support body, and a rotary motion of each of the slewing gearboxes converted into the aforementioned pawl A seedling device for a relative slewing mechanism of a reciprocating motion between a seedling supply point and a seedling implanted on the ground.

The above-mentioned planting apparatus has been disclosed in the prior art, for example, in the patent of the Chinese Patent Publication No. CN87103763. In the conventional structure, the central axis, the first support shaft, and the axis of the planetary shaft are arranged in a line. The relative movement trajectory of the claws of the rotary add-and-drop mechanism is "waist-shaped", which is mainly used for the rider. If it is used in a walking transplanter, the hole in the planting pit is too large, which is easy to cause drips and squats. This is explained in detail later. However, the rotary add/drop mechanism has the advantages of small inertia force, small vibration and good stability compared with the crank rocker type insertion and insertion mechanism. Summary of the invention

The technical problem to be solved by the present invention is to provide a rotary add/drop mechanism suitable for a walking type rice transplanter, which has a relatively small structural size and a small vibration. To this end, the technical solution adopted by the present invention is: It includes a transmission portion And the planting arm component; the transmission component is provided with a driving sprocket on the transmission shaft in the sprocket box, and the chain is connected with a central sprocket mounted on the central shaft of the sprocket box, and the central axis extends outside the sprocket box The left and right shaft ends are respectively fixed with left and right gear boxes; the left and right central gears of the left and right gear boxes are respectively equipped with left and right center gears fixed to the sprocket box by left and right flanges respectively The left and right center gears are respectively engaged with the left and right first intermediate gears fixed on the left and right intermediate shafts to drive the left and right second intermediate gears coaxial with the left and right first intermediate gears, and are fixed at The left and right planet wheels on the left and right planet shafts respectively mesh with the left and right second intermediate gears, and the left and right planet shafts extend to the left and right gear boxes, and the left and right planting arm members are fixed to the left; The left and right sun gears in the right gear box, the left and right first intermediate gears and the left and right second intermediate gears, and the relative positions of the three-axis axes of the left and right planetary gear triax gear planetary systems are arranged in a triangle.

When the left and right planetary gears are round gears, the left and right second intermediate gears are the same round gears as the left and right planetary gears, and the left and right first intermediate gears and the left and right central gears. It is an eccentric or non-circular gear with the same geometrical parameters of the gear.

In order to solve the technical problem to be solved by the present invention, the present invention can also adopt the following technical solutions: It comprises a transmission component and a planting arm component; the transmission component is provided with a driving sprocket on a transmission shaft in the sprocket box, which is attached to the chain The central sprocket on the central axis of the sprocket box is connected, and the left and right shaft ends of the left and right sides of the center shaft extending outside the sprocket box are respectively fixed with left and right gear boxes; the central axis in the left and right gear boxes The left and right center gears are respectively fixed on the sprocket box by the left and right flanges; the left and right center gears are respectively driven by the left and right first intermediate gears fixed on the left and right intermediate shafts respectively. Left and right planet wheels fixed on the left and right planet shafts, left and right planet shafts extending to the left and right gear boxes are fixed with left and right planting arm members at one end; left and right gear boxes in the left The right central gear, the left and right first intermediate gears, and the relative positions of the three-axis axes of the left and right planetary triax gear planetary systems are arranged in a triangle.

When the left and right planetary gears are eccentric or non-circular gears, the left and right planetary gears, the left and right first intermediate gears, and the left and right central gears are non-spherical gears whose gear geometric parameters are identical.

The left and right planting arm members are all of a straight arm type structure, that is, the action point of the fork to the push rod and the action point of the cam are in the same transverse section of the fork shaft.

The left and right planting arm members are each fixed with a claw composed of two angled steel fingers, the lower part of the finger is a sharp blade shape, and the inner side between the two fingers is smooth.

The center gear is fixed, the center sprocket drives the gear box to rotate, and the planetary gear drives the end of the planetary shaft. A planting arm rotates non-uniformly with respect to the gear box, and the absolute movement of the planting arm is a synthetic movement of the planetary wheel relative to the non-uniform rotation of the gear box and the circular motion of the gear box about the central axis. Under the influence of this synthetic motion, the pawl in the planting arm component satisfies the requirements of the pawl angle at the time of picking up and the pawl angle at the time of insertion.

The beneficial effects of the present invention are: (1) there is only one set of planetary gears in the gear box relative to the sun gear, and (2) the relative positions of the three-axis axes of the gear planetary system are arranged in a triangle. (3) The gear box turns one turn, and drives one planting arm to realize the insertion of one hole. It is suitable for the transplanting frequency when the walking transplanter works, and the planting pit becomes the smallest, which is good for standing, reducing the drifting rate and the lodging rate; (4) If the gear box speed is increased, it can also be used on the high-speed rice transplanter; (5) The claws composed of two angle-shaped fingers are used, and the bottom of the rank finger is sharp blade shape, which can reduce the time when the claws are taken. The frictional resistance between the soil, the inner side between the two fingers is smooth, not easy to be scarred; the structure is simple, the volume is small, the weight is light, the vibration is small, and the manufacturing cost is also low. DRAWINGS

Figure 1 is a schematic view of the mechanism of the present invention;

Figure 2 is a structural assembly view of the present invention;

Figure 3 is a cross-sectional view taken along line B-B of Figure 2;

Figure 4 is a schematic view showing the transmission principle of the elliptical gear-elliptical gear-circular gear of the present invention in which the three-axis axial center is arranged in a triangle;

Fig. 5 is a schematic view showing the transmission principle of the "elliptical gear-elliptical gear-elliptical gear" of the present invention in which the three-axis axis is arranged in a triangle shape.

Figure 6 is a three-dimensional schematic view of the jaw shape of the present invention.

Fig. 7 is a schematic view showing the movement trajectory of the tip of the claw of the present invention.

Fig. 8 is a schematic view showing the movement trajectory of the tip of the claw of the conventional rotary add/drop mechanism.

Figure 1-5: 1. Center shaft, 2 '. Left flange, 2. Right flange, 3. Center sprocket, 4. Sprocket box, 5 '. Left gear box, 5. Right gear box, 6 'Left planet wheel, 6. Right planet wheel, '. Left planet axle, 7. Right planet axle, 8 '. Left planting arm component, 8. Right planting arm component, 9 '. Left fork, 9. Right Fork, 10 '. Left cam, 10. Right cam, 11'. Left second intermediate gear, 11. Right second intermediate gear, 12'. Left intermediate shaft, 12. Right intermediate shaft, 13'. Left first Intermediate gear, 13. Right first intermediate gear, 14 '. Left center gear, 14. Right center gear, 15. Claw, 16. Push rod, 17. Drive shaft, 18. drive sprocket, 19. chain, 20. push spring, 21. cushion. detailed description

As shown in Figures 1 and 2, the rotary add/drop mechanism of the walking type rice transplanter of the present invention comprises a transmission member and a planting arm member.

The transmission member includes a drive sprocket 18 on the drive shaft 17 in the sprocket case 4, and is connected via a chain 19 to a center sprocket 3 mounted on the central shaft 1 in the sprocket case 4, and the center shaft 1 extends out of the sprocket case The left and right side shaft ends of the outer left and right sides are respectively fixed with left and right gear boxes 5', 5.

The central shaft 1 in the left and right gear boxes 5', 5 are respectively provided with left and right center gears 14', 14 fixed to the sprocket case 4 through the left and right flanges 2', 2, respectively. The right sun gears 14', 14 are respectively fixed by the left and right first intermediate gears 13', 13 and the left and right second intermediate gears 11', 11 fixed on the left and right intermediate shafts 12', 12, respectively. The left and right planet wheels 6', 6 on the left and right planet shafts 7', 7 and the left and right planet shafts 7', 7 extend to the left and right gear boxes 5', 5 respectively. Plant arm parts 8', 8.

As shown in FIG. 4, the left and right sun gears 14', 14 in the left and right gear boxes 5', 5, the left and right first intermediate gears 13', 13, the left and right second intermediate gears 11 The relative positions of the ', 11 and the left and right planet wheels 6', 6 triaxial gear planetary systems are arranged in a triangle.

In the above embodiment, the left and right planet gears 6', 6 are round-spindle gears, and the left and right second intermediate gears 11', 11 are identical in geometry to the left and right planet gears 6', 6 gears. The round gear, the left and right first intermediate gears 13', 13 and the left and right sun gears 14', 14 are eccentric or non-circular gears having identical gear geometrical parameters.

In the implementation, the left and right planetary gears 6', 6 can also adopt an eccentric circular gear or a non-circular gear. At this time, the left and right first intermediate gears 13', 13 are directly connected with the left and right planetary gears 6'. , 6 meshing, left and right second intermediate gears 11 ', 11 can be omitted. The left and right planet gears 6', 6, the left and right first intermediate gears 13', 13 and the left and right sun gears 14', 14 are non-spherical gear transmissions having identical gear geometry parameters. The left and right sun gears in the left and right gear boxes, the left and right first intermediate gears, and the relative positions of the three-axis axes of the left and right planetary gear triax gear planetary systems are arranged in a triangle. As shown in FIG. 5, the relative positions of the central axis 1, the left and right intermediate shafts 12', 12, and the left and right planetary shafts 7', 7 are axially arranged. The left and right planting arm members 8', 8 are all straight arm type structures, that is, the point of action of the fork to the push rod and the point of action on the cam are in the same transverse section of the fork shaft.

As shown in FIG. 3, taking the right planting arm member 8 as an example, it is equipped with a pushing device, including: a right cam 10, a right shifting fork 9, a push spring 20, a cushion 21, a pawl 15, and a push rod 16 . The right cam 10 is fixedly coupled to the right gear case 5. As shown in Fig. 6, the bottom P1 of the angled steel finger has a sharp blade shape, and the inner side P2 between the two fingers is smooth.

As shown in Fig. 7, the figure is a schematic diagram of the movement trajectory of the tip of the claw of the present invention, where β is the trajectory of the cusp tip, that is, the trajectory when the machine is not walking, b is the trajectory, that is, the trajectory of the machine when walking, c is the seedling, d is Horizon, e is the claw, s is the pit width.

As shown in FIG. 8, the schematic diagram of the movement trajectory of the claw tip portion of the conventional rotary type insertion and insertion mechanism has its central axis, the first support shaft and the axis of the planetary shaft arranged in a straight line, and α ' is the static trajectory of the tip of the claw, b' For the trajectory, c is the seedling, d is the horizon, e is the claw, and s' is the width of the pit.

As can be seen from Fig. 7 and Fig. 8, the present invention makes the planting pit small, and s is about one third of s'. The working principle of the invention is that the power of the add-in mechanism is transmitted by the chain sprocket of the sprocket of the rice transplanter to the central sprocket through the chain, the central axis of the drive rotates, and the left and right gear boxes are rotated, and at the same time, the left and right gears are rotated. In the box, the fixed fixed center gear drives the planetary gear through the intermediate gear. When the planetary gear rotates with the planetary shaft relative to the gear box, the planting arm moves, and the shifting fork swings around the fixed cam. Before the picking, the fork passes through the cam. Raise the rising section, raise the push rod to the last point, and compress the push spring; before the picking is inserted, the fork is at the highest position of the cam; when the claw reaches the insertion position, the fork turns to The cam notch, push the spring back to push the push rod down quickly, pushing the seedling into the soil. Therefore, the picking and transplanting action of rice seedlings was completed in sequence, and the mechanized transplanting of rice seedlings was realized.

The movement of the planting arm member is a combined movement of the planetary gears with the unequal speed of the planetary shaft relative to the gearbox and the circular motion of the gearbox about the central axis. The gear box rotates once, and the transplanting frequency of the planting arm and the "dolphin" track are suitable for the working requirements of the walking rice transplanter.

The above-mentioned embodiments are intended to be illustrative of the present invention and are not to be construed as limiting the scope of the present invention. Any modifications and variations of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A rotary add-and-drop mechanism for a walking transplanter, comprising a transmission component and a planting arm component; a transmission sprocket (18) is mounted on the transmission shaft (17) in the sprocket box (4) through the chain (19) Connected to the center sprocket (3) mounted on the central shaft (1) in the sprocket case (4), and the central shaft (1) extends out of the left and right shaft ends outside the sprocket case (4) Left and right gear boxes (5', 5) are respectively fixed; the main shafts (1) in the left and right gear boxes (5', 5) are respectively equipped with left and right flanges (2', 2) left and right center gears (14', 14) fixed to the sprocket box (4); left and right center gears (14', 14) are respectively fixed to the left and right intermediate shafts The left and right first intermediate gears (13', 13) on (12', 12) engage the left and right second intermediate gears (11' that are coaxial with the left and right first intermediate gears (13', 13). , 11), the left and right planet gears (6', 6) fixed to the left and right planet shafts (7', 7) mesh with the left and right second intermediate gears (11', 11), respectively, left, Right planetary shaft (7', 7) extends left and right gear boxes (5', 5) Left and right planting arm parts (8', 8) are fixed at one end; left and right center gears (14', 14) in the left and right gear boxes (5', 5), left and right first middle The relative positions of the gears (13', 13) and the left and right second intermediate gears (11', 11), the left and right planetary gears (6', 6) of the triaxial gear planetary system are arranged in a triangle.

2. The rotary add/drop mechanism of a walking type rice transplanter according to claim 1, wherein: said left and right planetary gears (6', 6) are round gears, and left and right second intermediate gears ( 1 , 11) are the round gears with the same geometrical parameters as the left and right planet wheels (6', 6), the left and right first intermediate gears (13', 13) and the left and right central gears (14', 14) It is an eccentric or non-circular gear with the same geometrical parameters of the gear.

3. The rotary add/drop mechanism of the walking type rice transplanter according to claim 1, wherein: the left and right planting arm members (8', 8) are all straight arm type structures, that is, a pair of forks The point of action of the push rod and the point of action on the cam are in the same transverse section of the fork shaft.

4. The rotary add/drop mechanism of the walking rice transplanter according to claim 1, wherein: the left and right planting arm members (8', 8) are each fixed with two angled steel shapes. The 秧 finger consists of the claw (15). The bottom of the 秧 finger has a sharp blade shape, and the inner side between the two fingers is smooth.

5. The rotary add/drop mechanism of the walking transplanter, which comprises a transmission component and a planting arm component; a drive sprocket (18) is mounted on the transmission shaft (17) in the sprocket case (4) through the chain (19) Connected to the center sprocket (3) mounted on the central shaft (1) of the sprocket box (4), and the center shaft (1M is applied to the left and right shaft ends outside the sprocket box (4) Left and right Gear box (5', 5); characterized in that: the central axis (1) in the left and right gear boxes (5', 5) are respectively mounted through left and right flanges (2', 2) Left and right sun gears (14', 14) fixed to the sprocket box (4); left and right sun gears (14', 14) are respectively fixed to the left and right intermediate shafts (12', 12) The upper left and right first intermediate gears (13', 13) mesh to drive the left and right planet wheels (6', 6) fixed to the left and right planet axes (7', 7), left and right planet axles (7', 7) One end of the left and right gear boxes (5', 5) are fixed with left and right planting arm parts (8', 8); the left and right gear boxes (5', 5) Left and right center gears (14', 14), left and right first intermediate gears (13', 13), left and right planetary gears (6', 6) three-axis gears of the three-axis axis The relative positions are arranged in a triangle.

6. The rotary add/drop mechanism of the walking rice transplanter according to claim 5, wherein: the left and right planetary gears (6', 6) are eccentric or non-circular gears, left and right. The planet wheels (6', 6), the left and right first intermediate gears (13', 13) and the left and right sun gears (14', 14) are non-spherical gears with identical gear geometry parameters.

7. The rotary add/drop mechanism of the walking type rice transplanter according to claim 5, wherein: the left and right planting arm members (8', 8) are straight arm type structures, that is, a pair of forks The point of action of the push rod and the point of action on the cam are in the same transverse section of the fork shaft.

The rotary add/drop mechanism of the walking type rice transplanter according to claim 5, wherein: the left and right planting arm members (8', 8) are fixed with two angled steel shapes. The 秧 finger consists of the claw (15). The bottom of the 秧 finger has a sharp blade shape, and the inner side between the two fingers is smooth.