CN206314194U - A kind of coaxial double-rod ejection type eccentric gear non-conical bevel gear planetary system wide-and narrow-row rice seedling throwing mechanism - Google Patents

Abstract

The utility model discloses a coaxial double-rod ejection type eccentric gear-non-conical bevel gear planetary system wide and narrow row seedling throwing mechanism, which comprises a gear box, and the inside of the gear box is supported by a central gear, a lower upper middle gear, a lower upper middle Eccentric bevel gear, lower and upper planetary non-conical bevel gear, the lower and upper planetary non-conical bevel gear are coaxially connected with the lower and upper transplanting arm; the hollow sleeve rod is slidingly arranged in the casing of the planting arm, and the hollow sleeve rod A solid push rod is provided for sliding; a double-contour cam, a shift fork and a trigger are hinged in the casing of the planting arm, and the outer end of the hollow sleeve rod is provided with a seedling picking mechanism; Conical bevel gears take into account the non-uniform speed ratio transmission of eccentric gears and non-circular gears and the space transmission of bevel gears as the transmission mechanism. Cooperating with coaxial double-rod ejection planting arms, it can effectively meet the agronomic requirements of different width and narrow rows. Fill the technical gap of the rice throwing machine.

Description

A coaxial double-rod ejection type eccentric gear-non-conical bevel gear planetary system with wide and narrow rows Seedling throwing mechanism

technical field

The utility model relates to the field of agricultural machinery, in particular to a coaxial double-rod ejection type eccentric gear-non-conical bevel gear planetary system wide and narrow row rice seedling throwing mechanism.

Background technique

At present, there are three main methods of rice mechanical planting: direct seeding, transplanting and throwing. Among them, direct seeding is a disorderly planting method with a long growth period. Transplanting has a slow seedling period of 5 to 7 days. Both methods will prolong the growth period; however, there is no slow seedling period for throwing seedlings. -15% yield. In addition, seedling throwing has the advantages of fast transplanting speed and no damage to the roots, and is recommended by rice planting experts as the planting technique with the highest yield increase rate. However, disorderly seedling throwing operation is not conducive to later field management, and affects rice ventilation, uniform absorption of sunlight and soil nutrients, and is easy to cause diseases and insect pests. It is not suitable for the national conditions of small field planting in my country and thus affects the promotion of seedling throwing machines. Therefore the research and development of orderly seedling throwing mechanism is the key to solving the above problems.

In the early 1980s, Japan had produced orderly rice seedling throwing machinery and entered the market; due to its complex structure, high processing precision requirements, high cost, low work efficiency and many other reasons, it could not be widely promoted, accounting for only 20% of the rice planting area. 0.5% or less.

In addition, wide and narrow row throwing means that the row spacing of the rice seedling throwing machine is one wide and one narrow planting method. This planting method uses the principle of crop marginal advantage to increase production. By adjusting the row spacing of throwing seedlings, the ventilation and light transmission between plants are improved. degree, reduce disease, increase leaf area index, prolong leaf life, accelerate dry matter accumulation, so as to achieve the purpose of high quality and high yield, saving cost and increasing efficiency.

The wide and narrow row splitting mechanism is a component on the seedling throwing machine that realizes taking seedlings, ejecting the seedlings into the field, and planting the seedlings in wide and narrow rows. The utility model adopts helical gears, eccentric bevel gears and non-conical bevel gears to realize the requirement of throwing rice seedlings in wide and narrow rows. , optimize the relevant mechanism parameters, and design a wide and narrow row ejection mechanism that meets the agronomic requirements of different models and different width and narrow rows.

Utility model content

The purpose of this utility model is to provide a coaxial double-rod ejection type eccentric gear-non-conical bevel gear planetary system wide and narrow row rice seedling throwing mechanism according to the existing technical deficiencies.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a coaxial double-rod ejection type eccentric gear-non-conical bevel gear planetary system wide and narrow row rice seedling throwing mechanism, including a gear box, and a central gear is supported inside the gear box , the lower intermediate gear, the lower intermediate eccentric bevel gear, the lower planetary non-conical bevel gear, the upper intermediate gear, the upper intermediate eccentric bevel gear, and the upper intermediate eccentric bevel gear, the lower intermediate gear and the lower intermediate eccentric bevel gear are coaxially fixedly connected, The upper intermediate gear and the upper intermediate eccentric bevel gear are coaxially fixedly connected, the central gear meshes with the lower intermediate gear and the upper intermediate gear respectively, and the lower intermediate eccentric bevel gear meshes with the lower planetary non-conical bevel gear. The upper middle eccentric bevel gear meshes with the upper middle eccentric bevel gear; it also includes an upper transplanting arm and a lower transplanting arm; the lower planetary non-conical bevel gear is coaxially connected with the lower transplanting arm, and the upper middle eccentric bevel The gear is coaxially connected with the upper transplanting arm;

The upper and lower transplanting arm parts have the same structure, and both include a planting arm housing. A hollow sleeve rod is slidably arranged in the planting arm housing, and a solid push rod is slidably arranged in the hollow sleeve rod. The hollow sleeve rod A sleeve rod spring is provided between the end of the end of the planting arm and the planting arm housing, and a push rod energy gathering spring is provided between the solid push rod and the planting arm housing; the hollow sleeve rod is provided with a first limiting plate, a second Two limit plates and an opening and closing mechanism; the solid push rod is provided with a buckle groove, and the opening and closing mechanism is opened and closed with the buckle groove; the casing of the planting arm is hinged with a double contour cam, a shift fork and a trigger , the shift fork is coaxial with the trigger, one end of the shift fork is mounted between the first limit plate and the second limit plate, the other end of the shift fork and one end of the trigger are both aligned with the double contour line The cam abuts, the other end of the trigger is coordinated with the opening and closing mechanism for transmission, and a trigger tension spring is arranged between the other end of the trigger and the planting arm housing; the outer end of the hollow sleeve rod is arranged There is a seedling picking mechanism;

The planting arm housing is coaxially and fixedly connected with the lower planetary non-conical bevel gear, and the double contour cam is fixedly connected with the gear box.

Further, the central gear, the lower and upper intermediate gears, the lower and upper intermediate eccentric bevel gears and the lower and upper planetary non-conical bevel gears in the gearbox are arranged in a linear arrangement with respect to the axes of the five-axis gear planetary system Or in a triangular arrangement symmetrical to the axis of the sun gear.

Further, the axis of the lower and upper intermediate gears and the axis of the central gear are staggered at an angle of θ or arranged in parallel, the axis of the lower and upper planetary non-conical bevel gears and the axis of the lower and upper intermediate gears The axis intersection angle between the axes is an included angle φ not equal to 90 degrees.

Further, the opening and closing mechanism includes a Z-shaped buckle and a Z-shaped buckle compression spring, the Z-shaped buckle is hinged on the hollow sleeve rod, and a Z-shaped buckle compression spring is arranged between one end of the Z-shaped buckle and the hollow sleeve rod , the other end of the Z-shaped buckle is open and closed connected with the buckle groove.

Further, the double contour cam has a first annular groove and a second annular groove.

Further, the central angle range α of the first annular groove is 75-85 degrees, the central angle range β of the second annular groove is 345-350 degrees, the first annular groove and the second annular groove The angle between the axes of symmetry where 100-250 degrees.

Further, one end of the shift fork is mounted between the first limit plate and the second limit plate; the other end of the shift fork abuts against the first annular groove of the double contour cam, and the trigger One end of the trigger abuts against the second annular groove of the double-contour cam, a trigger tension spring is set between the other end of the trigger and the planting arm housing, and the other end of the trigger cooperates with the Z-shaped buckle for transmission.

Further, the seedling picking mechanism includes a seedling needle, which is symmetrically hinged on the outer end of the hollow sleeve rod, and a seedling needle clamping spring is arranged between the seedling needle and the hollow sleeve rod.

Further, the outer end of the solid push rod is fixedly connected with a trapezoidal guide block, and the trapezoidal guide block is located between two seedling needles.

The beneficial effect that the utility model has is:

1. Using eccentric bevel gears and non-conical bevel gears taking into account the non-uniform speed ratio transmission of eccentric gears and non-circular gears and the space transmission of bevel gears as the transmission mechanism, combined with the coaxial double-rod ejection planting arm, can effectively meet different requirements. The agronomic requirements of wide and narrow rows of seedling throwing fill the technical gap of seedling throwing machines.

2. At present, most of the domestic seedling throwing machines use human-powered backpack throwing machines. The principle is to use compressed air to blow out the rice bowl and use gravity to land, which is exactly the same as the traditional manpower throwing method. Although labor costs are saved, it is still Problems such as seedling floating and uneven distribution of seedlings cannot be solved. The utility model makes an innovative design for the planting arm of the seedling throwing mechanism. The clamping and ejection process of the pot seedlings is realized in two steps. The double-convex contour mechanism and the detachable pusher lever device are used to change the work of the traditional seedling throwing mechanism. Sequentially, increase the ejection link of rice pot seedlings. This design can achieve no damage to the seedlings, improve the survival rate of the seedlings, and eject the seedlings into the soil at a certain height, which can effectively solve the problems of seedlings floating and uneven distribution of seedlings. This design aims to Solve the problems related to the floating and uneven distribution of rice seedlings when the rice seedling throwing mechanism is working, and use machinery to replace manual seedling throwing.

Description of drawings

Fig. 1 is the structural representation of the seedling throwing mechanism of utility model embodiment;

Fig. 2-3 is the three-dimensional view of the planetary gear transmission of the utility model embodiment;

Fig. 4 is the transmission layout diagram of the planetary non-conical bevel gear and the intermediate eccentric bevel gear of the present utility model, in the figure Angle represents the shaft angle between the planetary non-conical bevel gear and the intermediate eccentric bevel gear;

Fig. 5 is a transmission gear diagram when the central gear and the intermediate gear of the present utility model have a staggered angle, in which the θ angle represents the staggered angle between the intermediate shaft and the center;

Fig. 6 is a sectional view of the planting arm in the embodiment of the present invention;

Fig. 7 is the top view of the planting arm in the utility model embodiment;

Figure 8 is a partial enlarged view in Figure 6;

Fig. 9 is an axonometric view of a double-contour cam in an embodiment of the present invention;

Fig. 10 is a side view of the transfer axis of the trigger and the shift fork in the embodiment of the utility model;

Fig. 11 is a schematic diagram of the central angle of the first annular groove in the embodiment of the present invention;

Fig. 12 is a schematic diagram of the central angle of the second annular groove in the embodiment of the present invention;

Fig. 13 is a schematic diagram of the positional relationship between the first annular groove and the second annular groove in the embodiment of the present invention;

Fig. 14 is a schematic diagram of the five movement processes of the hollow sleeve rod embodied on the double contour cam in the embodiment of the present invention;

In the figure: 1. Sleeve rod spring, 2. Push rod energy gathering spring, 3. Hollow sleeve rod, 4. Solid push rod, 5. Shift fork, 6. Z-shaped buckle, 7. Z-shaped buckle compression spring, 8. Pull trigger, 9. Pull trigger tension spring, 10. Double contour cam, 11. Planting arm housing, 12. Seedling needle, 13. Seedling needle clamping spring, 14. Trapezoidal guide block, 15. Seedling needle fixing frame , 16. The first limiting plate, 17. Buckle groove, 18. The second limiting plate, 101. The first annular groove, 102. The second annular groove, 19. Center sprocket, 20. Central shaft, 21 .Inlaid flange, 22. Lower intermediate gear, 23. Lower planetary shaft, 24. Lower planetary non-conical bevel gear, 25. Lower planting arm, 26. Lower intermediate eccentric bevel gear, 27. Lower intermediate shaft, 28. Upper intermediate shaft, 29. Upper intermediate gear, 30. Upper intermediate eccentric bevel gear, 31. Upper planetary shaft, 32. Upper planetary non-conical bevel gear, 33. Upper planting arm, 34. Gear box, 35. Central gear, 36 .chain, 37. driving sprocket, 38. driving sprocket shaft, 39. sprocket box.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1, the utility model is installed on the transmission part of rice seedling throwing machine, and described transmission part comprises transmission box 39, and in transmission box 39, power is contained in the drive sprocket wheel 37 on the drive sprocket shaft 38 through The chain 36 is transmitted to the central sprocket 19, and the central sprocket 19 is fixedly connected to the central shaft 20, and the two shaft ends of the central shaft 20 are respectively fixed with the utility model with the same internal transmission structure;

As shown in Figure 2-3, the utility model includes a gear box 34. The internal transmission structure of the gear box 34 is as follows: the central gear 35 is empty on the right side of the central shaft 20, through the tooth-embedded flange 21 and the sprocket box 39 Fixed connection, the central gear 35 meshes with the lower intermediate gear 22 fixedly mounted on the lower intermediate shaft 27 and the upper intermediate gear 29 fixedly mounted on the upper intermediate shaft 28 respectively, and the lower intermediate gear 22 is coaxially installed with the lower intermediate gear 22 The lower middle eccentric bevel gear 26 rotates, and the upper middle eccentric bevel gear 29 drives the upper middle eccentric bevel gear 30 installed coaxially with the upper middle gear 29 to rotate, and the lower middle eccentric bevel gear 26 and the lower planetary non-conical gear fixed on the lower planet shaft 23 The bevel gear 24 is meshed, the upper middle eccentric bevel gear 30 is meshed with the upper planetary non-conical bevel gear 32 fixed on the upper planetary shaft 31, and one end of the lower planetary shaft 23 and the upper planetary shaft 31 stretches out of the gearbox 34 and is fixed respectively. Connected with following planting arm 25 and last planting arm 33.

As shown in Figure 4-5, the central gear 35 in the described gear box 34, the lower and upper intermediate gears 22,29, the lower and upper intermediate eccentric bevel gears 26,30 and the lower and upper planetary non-conical bevel gears 24, 32 The relative positions of the axes of the five-axis gear planetary system are arranged in a straight line or in a triangle symmetrical to the axis of the sun gear. The lower and upper intermediate shafts 27, 28 and the central axis 20 are staggered at an angle of θ or arranged in parallel. Between the lower and upper planet shafts 23, 31 and the lower and upper intermediate shafts 27, 28 The axis intersection angle is an included angle φ not equal to 90 degrees according to the corresponding wide and narrow row spacing agronomic requirements.

As an embodiment, the central gear 35, the lower intermediate gear 22, and the upper intermediate gear 29 in the transmission box 34 are all helical gears.

As an embodiment, the central gear 35 in the transmission box 34 is a helical gear, and the lower intermediate gear 22 and the upper intermediate gear 29 are spur gears.

As an embodiment, the central gear 35 in the transmission box 34 is a spur gear, and the lower intermediate gear 22 and the upper intermediate gear 29 are helical gears.

As an embodiment, the central gear 35 in the transmission box 34 is a spur gear, and the lower intermediate gear 22 and the upper intermediate gear 29 are both spur gears.

As an embodiment, the central gear 35, the lower intermediate gear 22 and the upper intermediate gear 29 in the transmission box 34 are oval gears, non-circular gears, eccentric gears or eccentric-non-circular gears, and spur gears. The elliptical gear is a first-order elliptical gear, a first-order modified elliptical gear, a higher-order elliptical gear or a higher-order modified elliptical gear.

As shown in Figures 6-8, the upper planting arm 33 and the lower planting arm 25 have the same structure, and both include a planting arm housing 11, and a hollow sleeve rod 3 is slidably arranged inside the planting arm housing 11, and the hollow sleeve A solid push rod 4 is slidingly arranged in the rod 3, and a sleeve rod spring 1 is arranged between the end of the hollow sleeve rod 3 and the planting arm housing 11, and a sleeve spring 1 is arranged between the solid push rod 4 and the planting arm housing 11. There is a push rod energy gathering spring 2; the hollow sleeve rod 3 is provided with a first limit plate 16, a second limit plate 18 and an opening and closing mechanism; the solid push rod 4 has a buckle groove, and the opening The closing mechanism is opened and closed with the buckle groove 17; the planting arm housing 11 is hinged with a double contour cam 10, a shift fork 5 and a trigger 8, and the shift fork 5 and the trigger 8 are coaxial, as shown in Figure 7. One end of the shift fork 5 is mounted between the first limit plate 16 and the second limit plate 18, the other end of the shift fork 5 abuts against the double contour cam 10, and the trigger 8 is in contact with the opening and closing The mechanism cooperates with the transmission, and the trigger tension spring 9 is arranged between the trigger 8 and the planting arm housing 11; the outer end of the hollow sleeve rod 3 is provided with a seedling picking mechanism.

The planting arm housing 11 of the upper planting arm 33 is coaxially fixedly connected with the upper planetary non-conical bevel gear 32, that is, the planting arm housing 11 and the upper planetary non-conical bevel gear 32 have the same support shaft, and the planting arm housing 11 has no relative displacement with the upper planetary non-conical bevel gear 32; the planting arm housing 11 of the lower planting arm 25 is coaxially fixedly connected with the lower planetary non-conical bevel gear 24, and the double contour cam 10 is fixed with the gear box 34 connect.

As shown in Figure 8, the opening and closing mechanism includes a Z-shaped buckle 6 and a Z-shaped buckle compression spring 7, the Z-shaped buckle 6 is hinged on the hollow sleeve rod 3, and one end of the Z-shaped buckle 6 is connected to the hollow sleeve rod A Z-shaped buckle compression spring 7 is arranged between the 3, and the other end of the Z-shaped buckle 6 is buckled on the buckle groove 17.

As shown in Figure 9 and Figures 11-13, there are two annular grooves on the double contour cam 10, i.e. the first annular groove 101 and the second annular groove 102, the central angle of the first annular groove 101 The range α is 75-85 degrees, the central angle range β of the second annular groove 102 is 345-350 degrees, and the included angle between the axes of symmetry where the first annular groove 101 and the second annular groove 102 are located 100-250 degrees. Compared with ordinary cams, the dual-contour cam 10 is characterized in that only one power source is needed, and multiple independent tasks can be completed in the same rotation period without interfering with each other.

In this embodiment, two shift forks 5 are used, and the trigger 8 is clamped in the middle of the two shift forks 5. These three are hinged on the same rotating shaft. As shown in Figure 10, one end of the shift fork 5 is framed Between the first limit plate 16 and the second limit plate 18, one end of the shift fork 5 is driven by the double contour cam 10 to rotate around the hinge point of its shift fork 5, because one end of the shift fork 5 is mounted on Between the first limit plate 16 and the second limit plate 18 and between the end of the hollow sleeve rod 3 and the planting arm housing 11, a sleeve rod spring 1 is arranged, so that one end of the shift fork 5 is always against the first limit plate 16; when the hollow sleeve rod 3 moved outwards, the second limiting plate 18 limited the axial stroke of the hollow sleeve rod 3; 101, one end of the trigger 8 abuts against the second annular groove 102 of the double contour cam 10, and the other end of the trigger 8 cooperates with the Z-shaped buckle 6 to move the Z-shaped buckle 6. A trigger tension spring 9 is set between the other end of the trigger 8 and the planting arm housing 11 .

The coaxial double-rod ejection mechanism is one of the main mechanisms of this design, and it uses the design of 3 sets of solid push rods 4 with hollow sleeves to make the double rods work on the same axis all the time. In Figure 8, the Z-shaped buckle 6 is hinged on the hollow sleeve rod 3, and the Z-shaped buckle 6 can only rotate around the hinge or move axially along the axis of the hollow sleeve rod 3 along with the hollow sleeve rod 3. There is a buckle in the solid push rod 4 Slot 17, buckle the solid push rod 4 (as shown in Figure 8) through the Z-shaped buckle 6 to make the two rods move together, and rely on this mechanism to cooperate with the double contour cam 10 to complete the two characteristics of seedling taking and ejection on the same axis action.

As shown in Figure 7, the seedling-taking mechanism comprises a seedling needle fixing frame 15 and a seedling needle 12, and the seedling needle fixing frame 15 is fixed on the outer end of the hollow sleeve rod 3, and the seedling needle 12 is symmetrically hinged on the seedling needle fixed On the frame 15, a seedling needle clamping spring 13 is arranged between the seedling needle 12 and the seedling needle fixing frame 15. The outer end of the solid push rod 4 is fixedly connected with a trapezoidal guide block 14, and the trapezoidal guide block 14 is located between two seedling needles 12. The seedling picking mechanism belongs to the terminal actuator of the planting arm, wherein the trapezoidal guide block 14 is rigidly connected to the outer end of the solid push rod 4, and cooperates with the inner guide surface of the seedling needle 12 to realize the seedling removal while the solid push rod 4 moves axially. Needle opening and closing. Compared with the needles of the existing rice transplanter, because the needle clamping spring 13 is used to provide the clamping force, the needles will not be damaged and the seedlings will not be easily damaged when clamping hard objects.

The working principle of the utility model is as follows:

The central gear 35 is affixed to the sprocket box 39 through the tooth-embedded flange 21, so the central gear 35 is stationary and does not rotate, and the central shaft 20 rotates to drive the gear box 34 affixed to the central shaft 20 to rotate. The lower intermediate gear meshes 29, the lower intermediate eccentric bevel gear 30 meshes with the lower planetary non-conical bevel gear 24, and realizes the non-conical rotation. The housing 11 is coaxially fixedly connected with the lower planetary non-conical bevel gear 24, so the double contour cam 10 and the planting arm housing 11 have relative rotation.

The action of picking seedlings is realized by the seedling picking mechanism, as shown in Figure 6, the hollow sleeve rod 3 is rigidly connected with the entire seedling needle 12 fixing frame to realize the simultaneous movement of the two;

As shown in Figure 14, the hollow sleeve rod 3 is controlled by a double contour cam 10, a shift fork 5 and a spring (comprising a Z-shaped buckle compression spring 7 and a trigger tension spring 9), and the whole movement process includes close rest, push distance, There are 5 motion processes of return, far rest and ejection, the details are as follows:

(1) near rest: the seedling needle 12 is in the initial state, and the absolute motion and the implicated motion of the seedling needle 12 in this section are exactly the same. The other end is not buckled on the buckle groove 17, and the second limiting plate 18 is against the planting arm housing 11, so that the hollow sleeve rod 3 does not move axially.

(2) Push stroke: to realize the seedling picking process of the seedling needle 12, the other end of the shift fork 5 slides into the first annular groove 101 of the double contour line cam 10, and passes through the first annular groove on the double contour line cam 10 101 makes the hollow sleeve rod 3, the seedling needle holder 15 and the seedling needle 12 extend outwards in the axial direction, and at this moment, the solid push rod 4 and the trapezoidal guide block 14 are still still, and the seedling needle 12 moves forward relative to the trapezoidal guide block 14 Movement, the inner side of the seedling needle 12 is in contact with the trapezoidal guide block 14, so that the seedling needle 12 clamps the pot body under the joint action of the seedling needle clamping spring 13 pressure and the trapezoidal guide block 14, and the other end of the Z-shaped buckle 6 is buckled on the With buckle groove 17 on.

(3) Backstroke: After the other end of the shift fork 5 slides in the first annular groove 101 of the double contour line cam 10, the double contour line cam 10 continues to rotate, and the other end of the shift fork 5 begins to slide out of the first annular groove. Groove 101, so that the shift fork 5 pushes the first limit plate 16, thereby compressing the sleeve rod spring 1, during this process, the Z-shaped buckle 6 has buckled the buckle groove 17 of the solid push rod 4 and followed the hollow sleeve rod 3 to The sleeve rod spring 1 moves in the compressed direction, and the bowl moves together with the hollow sleeve rod 3 at the same time.

(4) Remote rest: the whole is in the state shown in Figure 6, the pot body is clamped on the seedling needle 12, the sleeve rod spring 1, and the push rod energy-gathering spring 2 are all in a compressed state; The distance from the center of rotation of the planetary wheels of the system remains constant.

(5) Ejection: the second annular groove 102 of the double contour cam 10 controls the movement of one end of the trigger 8, and when one end of the trigger 8 slides out of the second annular groove 102, the other end of the trigger 8 moves One end of the Z-shaped buckle 6, the Z-shaped buckle 6 utilizes the principle of leverage to disengage the other end of the Z-shaped buckle 6 from the connection with the buckle groove 17. At this time, the compressed push rod energy-gathering spring 2 releases the elastic potential energy, so that the solid push rod The bar drives the guide block 14 to move quickly, and the pot body clamped by the seedling needle 12 is ejected quickly and shot into the ground. After that, the state is maintained, and it is ready for the next time to take seedlings.

Claims (9)

1. a kind of coaxial double-rod ejection type eccentric gear-non-conical bevel gear planetary system wide-and narrow-row rice seedling throwing mechanism, including gear-box, The gear-box interior support have central gear, lower idler gear, it is lower in the middle of eccentric bevel gear, lower planet non-conical bevel gear, Upper idler gear, upper middle eccentric bevel gear, upper middle eccentric bevel gear, the lower idler gear and lower middle bias bevel gear Coaxially be fixedly linked, the upper idler gear and it is upper in the middle of eccentric bevel gear be coaxially fixedly linked, the central gear respectively with Lower idler gear and upper idler gear are meshed, and the lower middle eccentric bevel gear and lower planet non-conical bevel gear are meshed, The upper middle eccentric bevel gear and upper middle eccentric bevel gear are meshed；Also include upper transplanting arm and lower transplanting arm；Under described Planet non-conical bevel gear is coaxially connected with lower transplanting arm, and the upper middle eccentric bevel gear is coaxially connected with upper transplanting arm；

Characterized in that, the upper and lower transplants arm member structure is identical, including planting arm housings, in the planting arm housings Slip, which is provided with to slide in hollow loop bar, the hollow loop bar, is provided with solid push rod, the end of the hollow loop bar and plant Loop bar spring is provided between arm housing, push rod cumulative spring is provided between the solid push rod and planting arm housings；It is described Hollow loop bar is provided with the first limiting plate, the second limiting plate and open-and-close mechanism；Catching groove, the folding are provided with the solid push rod Mechanism is connected with catching groove folding；Be hinged with double outline cam, shift fork and triggering pulling in the planting arm housings, the shift fork and Triggering pulling is coaxial, and an end-rack of the shift fork is between the first limiting plate and the second limiting plate, the other end and button of the shift fork One end of trigger is abutted with double outline cam, and the other end of the triggering pulling coordinates with open-and-close mechanism to be driven, and the button is pulled Triggering pulling extension spring is provided between the other end and planting arm housings of machine；The outer end of the hollow loop bar is provided with seedling taking Mechanism；

The planting arm housings are coaxially fixedly linked with lower planet non-conical bevel gear, and the double outline cam is consolidated with gear-box Fixed connection.

2. coaxial double-rod ejection type eccentric gear according to claim 1-non-conical bevel gear planetary system wide-and narrow-row rice transplanting Mechanism, it is characterised in that：Central gear in described gear-box, upper and lower idler gear, it is upper and lower in the middle of eccentric bevel gear and The relative position in the axle center of the upper and lower shaft gear planetary system of planet non-conical bevel gear five be in line shape arrangement or on centre tooth Take turns the symmetrical triangular arrangement in axle center.

3. coaxial double-rod ejection type eccentric gear according to claim 1-non-conical bevel gear planetary system wide-and narrow-row rice transplanting Mechanism, it is characterised in that：Axis where described upper and lower idler gear and the angle that axis where central gear is in interlaced arrangement For θ or in parallel arrangement, axis where described upper and lower planet non-conical bevel gear and axis where upper and lower idler gear it Between crossed axis angle be to be not equal to 90 degree of included angle.

4. coaxial double-rod ejection type eccentric gear according to claim 1-non-conical bevel gear planetary system wide-and narrow-row rice transplanting Mechanism, it is characterised in that the open-and-close mechanism includes Z-shaped button and Z-shaped button compression spring, the Z-shaped button is hinged on hollow loop bar On, Z-shaped button compression spring, the other end and the catching groove folding of the Z-shaped button are set between one end of the Z-shaped button and hollow loop bar Connection.

5. coaxial double-rod ejection type eccentric gear according to claim 4-non-conical bevel gear planetary system wide-and narrow-row rice transplanting Mechanism, it is characterised in that there is first annular groove and the second annular groove on the double outline cam.

6. coaxial double-rod ejection type eccentric gear according to claim 5-non-conical bevel gear planetary system wide-and narrow-row rice transplanting Mechanism, it is characterised in that the center of circle angular region α of the first annular groove is 75-85 degree, the central angle model of the second annular groove β is enclosed for 345-350 degree, the angle between the axis of symmetry where the first annular groove and the second annular grooveFor 100- 250 degree.

7. coaxial double-rod ejection type eccentric gear-non-conical bevel gear planetary system wide-and narrow-row according to claim 5 or 6 is thrown Rice seedling distribution mechanism a, it is characterised in that end-rack of the shift fork is between the first limiting plate and the second limiting plate；The shift fork it is another End is abutted with the first annular groove of double outline cam, and one end of the triggering pulling and the second annular of double outline cam are recessed Groove is abutted, and triggering pulling extension spring, the other end of triggering pulling and Z-shaped button are set between the other end and planting arm housings of triggering pulling Coordinate transmission.

8. coaxial double-rod ejection type eccentric gear according to claim 7-non-conical bevel gear planetary system wide-and narrow-row rice transplanting Mechanism, it is characterised in that the seedling-taking mechanism includes seedling pin, the seedling is described for claiming to be hinged on the outer end of hollow loop bar Seedling pin fastening spring is provided between seedling pin and hollow loop bar.

9. coaxial double-rod ejection type eccentric gear according to claim 8-non-conical bevel gear planetary system wide-and narrow-row rice transplanting Mechanism, it is characterised in that the outer end of the solid push rod is fixedly connected with trapezoidal guide pad, the trapezoidal guide pad is located at two Between seedling pin.