CN1209004C - Machine for transplanting rice seedlings - Google Patents

Abstract

A riding rice planting machine designed to compactify the planting mechanism, which comprises a pipe frame-like transmission casing composed of a plurality of pipe-like lengthwise extending frames extending in the lengthwise direction, a pipe-like widthwise extending frame extending in the widthwise direction and installed between the front ends of the lengthwise extending frames, a pipe-like rear end frame connected to the rear end of each lengthwise extending frame and extending in the widthwise direction, wherein the front ends of drive shafts each rotatably received in the lengthwise extending frame are interlocked by an interlock shaft rotatably received in the widthwise extending frame, a planting arm shaft rotatably received in the rear end frame is interlocked with the rear end of each drive shaft through a unit clutch, and a planting arm having a planting claw is interlocked with the planting arm shaft, the unit clutch being disposed on the rear end frame.

Description

passenger rice transplanter

technical field

The invention relates to a passenger rice transplanter, in particular to a planting mechanism arranged on the transplanter for rice transplanting.

Background technique

The existing passenger rice transplanter is equipped with a planter in a liftable manner through a lifting mechanism at the rear of the walking body, and a seedling-carrying platform and a planting mechanism are arranged on the planting machine, and the rice shoots on the planting platform are arranged by the planting mechanism. Planted in the field.

The planting mechanism installs the transmission chain box made of aluminum die-casting extending in the front and rear direction at intervals to the left and right on the cylindrical tubular bracket extending in the left and right width direction, and the prime mover of the traveling body is linked to the PTO shaft connected to it. is connected to the interlocking shaft freely rotatable contained inside the bracket, and the interlocking shaft is interlockingly connected to the planting shaft rotatably accommodated inside the chain box in a state extending in the left and right width direction through a transmission chain. The arm shaft is linked with the planting arm with the planting claws, and a combination clutch is set between the transmission chain and the planting arm shaft, and the transmission chain and the planting arm shaft are connected by the combination clutch. status or disconnected status.

However, in the above-mentioned planting mechanism of the conventional passenger rice transplanter, the transmission chain case made of aluminum die-casting is mounted on the bracket, and the power transmission is performed by the transmission chain arranged inside the transmission chain case. Therefore, the structure of the power transmission line It is complicated, and the transmission chain case is manufactured by aluminum die-casting, so the manufacturing cost is high and the weight is also large.

Contents of the invention

Therefore, the object of the present invention is to realize the simplification of the structure and the reduction in size and weight of the insertion and insertion mechanism.

Therefore, in the planting mechanism of the passenger rice transplanter of the present invention, the traveling body of the passenger rice transplanter is equipped with a running part at the lower part of the body support, and a prime mover is provided at the upper part of the front part of the body support. The rear part of the walking body is liftably connected to a planting machine through a lifting mechanism, and the planting mechanism set on the planting machine is linked with the prime mover set on the walking body through the transmission shaft of the gearbox; it is characterized in that: The insertion mechanism consists of a plurality of tubular front and rear extension brackets extending in the front and rear direction, tubular left and right extension brackets erected between the front ends of the front and rear extension brackets and extending along the left and right width directions, and connected to the rear ends of each front and rear extension brackets and extending along the left and right sides. The tubular rear end bracket extending in the width direction forms a tube bracket-shaped transmission box; the linkage shaft that is freely rotatably accommodated in the left and right extension brackets is rotatably accommodated between the front ends of the drive shafts of the front and rear extension brackets They are interlockingly connected with each other, and the rear end of each drive shaft is connected with the planting arm shaft that is freely rotatable and accommodated in the rear end bracket through a combined clutch. The planting arm of the claw, and the above-mentioned combination clutch is arranged on the rear end bracket.

In addition, the combined clutch has a transmission gear linked to the drive shaft, and the transmission gear is configured to be in motion with the planting arm shaft, and a clutch actuator is freely slidable along the planting shaft, and the clutch actuator It is used to actuate the clutch by making the transmission gear and the planting arm shaft into a connected state or a disconnected state, and a stop member is arranged near the planting arm shaft, and the stop member is used only on the clutch actuator The clutch actuator is allowed to slide within the specified rotation angle range, so that the transmission gear and the planting arm shaft are cut off and the driving of the planting arm is stopped.

In addition, the stop member allows the clutch actuator to slide only when the rotation angle of the clutch actuator is between the rotation angle when the planting claw is above the floating body and the rotation angle at the position where the planting claw takes out the seedlings.

In addition, an engaging concave portion that engages the stop member only within a predetermined rotation angle range of the clutch operating body is formed on the clutch operating body, and an end portion of the engaging concave portion is formed in an inclined shape.

In the passenger rice transplanter of the present invention, a planter is arranged at the rear of the traveling body, a planting mechanism for planting rice seedlings is provided on the planter, and the planting mechanism is connected to the vehicle body provided on the traveling body in interlocking manner. prime mover.

The planting mechanism consists of a plurality of tubular front and rear extension brackets extending in the front and rear directions, tubular left and right extension brackets erected between the front ends of the front and rear extension brackets and extending along the left and right width directions, and connected to the rear ends of each front and rear extension brackets and along the The tubular rear end bracket extending in the left and right width direction forms a transmission box in the shape of a tube bracket.

Therefore, it is possible to reduce the weight of the insertion mechanism, improve assembly workability, and reduce manufacturing costs.

Moreover, the front ends of the drive shafts that are freely rotatably accommodated in the left and right extension brackets are interlinked with each other and are freely rotatably accommodated in the front ends of the drive shafts of the front and rear extension brackets, and the rear ends of the drive shafts are connected by a combined clutch. The planting arm shaft that is freely rotatably accommodated in the rear end bracket is connected in conjunction with the planting arm having the planting claws in conjunction with the planting arm shaft, so the power transmission structure of the planting mechanism can be simplified. Thereby, reduction in size and weight of the insertion mechanism and reduction in manufacturing cost can be achieved.

In addition, since the combination clutch is disposed on the rear end bracket, the assembly workability of the combination clutch can be improved.

Specifically, the combined clutch is movably matched with the transmission gear connected to the drive shaft on the shaft of the planting arm. The gear and the planting arm shaft are in a connected state or a disconnected state to perform clutch operation, and a stop member is arranged near the planting arm shaft, and the stop member is used only within a predetermined rotation angle range of the clutch actuator. The clutch actuator is allowed to slide, so that the transmission gear and the planting arm shaft are cut off, and the driving of the planting arm is stopped.

Therefore, the combination clutch can be downsized as much as possible.

And because the clutch actuator is allowed to slide only when the rotation angle of the clutch actuator is between the rotation angle when the planting claw is located above the floating body and the rotation angle at the position where the planting claw takes out the rice seedlings, so when the clutch When actuating, the front end of the planting claw will not stop under the floating body, which can prevent the planting claw from colliding with the field surface and road surface and be damaged, and can stop the planting claw while keeping the seedlings, without wasting seedlings .

In addition, in the clutch actuator, an engagement recess that engages the stop member only within a predetermined rotation angle range of the clutch actuator is formed, and the end of the engagement recess is formed in an inclined shape, so that the rotating clutch can be actuated. The engagement recess of the body smoothly engages the stop member, and smoothly activates the combination clutch.

Description of drawings

Fig. 1 is a left side view showing the passenger rice transplanter of the present invention, Fig. 2 is a plan view showing a frame, Fig. 3 is a partial section showing a planting mechanism, and Fig. 4 is a plan sectional view thereof, Fig. 5 is a plane sectional view showing the combination clutch, Fig. 6 is a partially cut rear sectional view, Fig. 7 is a plan view, Fig. 8 is a component diagram showing a transmission gear, and Fig. 9 is a clutch actuating body Figure 10 is a side view showing the trajectory of the planting claw.

Detailed ways

The present invention will be specifically described below with reference to the accompanying drawings.

Riding rice transplanter 1 of the present invention, as shown in Figure 1 , is provided with a planter 3 in a liftable manner through a lifting mechanism 4 at the rear of a walking body 2 that can be formed on its own.

Traveling machine body 2 as shown in Figure 1, disposes traveling portion 6 at the bottom of frame 5, in addition, disposes prime mover portion 7 at the front side upper portion of frame 5, disposes driver at the position close to this prime mover portion 7 rear. Operating part 8.

As shown in FIGS. 1 and 2 , the frame 5 has a hollow cylindrical front end pipe 11 extending in the left and right width direction between the front ends of a pair of right and left main pipes 9 and 10 extending in the front and rear directions.

In addition, the frame 5 bridges a cylindrical engine support pipe 12 extending in the left and right width direction between the front middle parts of the main pipes 9 and 10, and bridges the engine support pipe 12 between the central part of the engine support pipe 12 and the central part of the front end pipe 11. The engine support plate 13 extending in the front-rear direction, in addition, a pair of gearbox support brackets 14, 15 are installed at the central rear part of the engine support pipe 12, and the rear parts of the main pipes 9, 10 are formed to be low in the front and high in the rear. Inclined, the rear ends of the main pipes 9, 10 are connected to the front ends of a pair of oblique tubes 16, 17 that extend into an inclined shape that is high at the front and low at the rear. A gearbox 18 extending in the front-rear direction is bridged between the gearbox support brackets 14, 15 and the rear ends of the inclined pipes 16, 17. In the figure, symbol 19 is a door-shaped seat support pipe erected between the middle parts of the main pipes 9 and 10, and symbols 20 and 21 are pedal support pipes installed in the middle part of the main pipes 9 and 10 in a state extending in the left and right width direction. 22 is a left and right pair of weights for adjusting the front and rear weight balance of the body, symbol 23 is a marker for peripheral planting, and symbol 24 is a middle marker.

1 and 2, a front axle housing 25 is integrally formed on the front side of the gearbox 18, and a pair of left and right front wheels 26, 27 are connected to the front axle housing 25 in conjunction with each other. The rear side portion of 18 is integrally formed with a rear axle case 28 , and a pair of left and right rear wheels 29 , 30 are connected to this rear axle case 28 in conjunction with each other.

As shown in FIGS. 1 and 2 , the prime mover unit 7 mounts an engine 31 as a prime mover on an upper portion of an engine support plate 13 , and a transmission case 18 is connected to this engine 31 in conjunction with each other.

The prime mover part 7 arranges the fuel tank 32 at the position directly above the engine 31, covers the engine 31 by the hood 33, and arranges the preliminary seedling planting platforms 34, 34 for placing the preliminary seedlings on the left and right sides of the hood 33.

As shown in FIG. 1 , in the driving operation unit 8 , a steering column 35 is erected on a hood 33 , a steering wheel 36 is disposed on the upper end of the steering column 35 , and a seat 37 is disposed immediately behind the steering wheel 36 .

In addition, the driving operation part 8 is arranged on the left side of the hood 33 so that the shift lever 38 for the speed change operation of the traveling body 2 and the clutch lever 39 that can be operated by the clutch from the outside of the body can be arranged to be swingable in the front and rear direction. A clutch pedal 40 is arranged for pedal operation, and a planting lift lever 41 for lifting and lowering the planter 3 is arranged on the right side of the seat 37 so as to be swingable in the front and rear directions.

In addition, a pair of left and right front pedals 44, 44 are arranged on the left and right sides of the hood 33 in the driving operation section 8, and a cover 45 is arranged from the bottom of the seat 37 to the left and right sides, and the floor is formed by the front steps 44, 44 and the cover 45. . In the figure, reference numeral 46 denotes a step for getting on and off formed on the cover body 45 .

As shown in FIG. 1 , the planting machine 3 is connected to the planting mechanism 53 at the rear of the lifting mechanism 4 , and the seedling-carrying platform 47 is placed on the top of the planting mechanism 53 in an inclined shape with a high front and a low rear. In the figure, symbol 48 is a floating body.

As shown in FIG. 2 , the base end portion of the PTO coupling 50 is connected to the front end portion of the PTO output shaft 49 protruding rearward from the middle portion of the gearbox 18 , and the front end portion of the PTO coupling 50 is interlocked. The base end portion of the relay shaft 51 is connected to the base end portion of the relay shaft 51, the base end portion of the conduction shaft 52 is connected to the front end portion of the relay shaft 51, and the front end portion of the conduction shaft 52 is connected to the insertion mechanism 53, thereby The power is transmitted to the planter 3.

The lifting mechanism 4 is installed between the upper part of the inclined pipe 16 and 17 at the rear part of the walking body 2, and a left and right pair of upper connecting rods 54, 54 can be freely rotated up and down. The left and right pair of lower links 55, 55 rotate the left and right pair of lower links 56, 56 connected to the lower links 55, 55 up and down by a lift cylinder (not shown), thereby raising and lowering the planter 3 .

As shown in FIG. 3 , the planting mechanism 53 is composed of three tubular front and rear extension brackets 57 , 58 , 59 extending in the front and rear directions arranged at intervals along the left and right width directions, and erected on the front and rear extension brackets 57 , 58 , and 59 . Two tubular left and right extending brackets 60, 61 extending along the left and right width directions between the front ends of 59, and a tubular rear end bracket 62 extending along the left and right width directions connected to the rear ends of each front and rear extending brackets 57, 58, 59 , 63, 64 form the transmission case 65 of pipe support shape. In the figure, reference numeral 66 is a hollow connecting body provided between the front and rear extension brackets 57 , 58 , 59 and the left and right extension brackets 60 , 61 .

In this way, in this embodiment, since the transmission case 65 of the planting mechanism 53 is formed in the shape of a pipe bracket, the weight and cost of the planting mechanism 53 can be reduced.

In addition, the planting mechanism 53 accommodates drive shafts 67, 68, and 69 in the front and rear extension frames 57, 58, and 59 so as to be rotatable, respectively, and in addition, the interlocking shafts 70 and 71 are rotatably housed in the left and right extension frames 60 and 61, respectively. , in addition, the planting arm shafts 72, 73, 74 are respectively freely rotatably accommodated in the rear end brackets 62, 63, 64, and the central drive shaft 68 is connected to the PTO output shaft 49 in linkage, and the interlocking shaft 70, 71 interlockingly connects the front ends of the driving shafts 67, 68, 69, and connects the planting arm shafts 72, 72, 73, 74. In the figure, the code|symbol 78 is the horizontal conveyance mechanism for reciprocating the seedling loading platform 47 to the left-right width direction.

Since the driving shafts 67, 68, 69, the interlocking shafts 70, 71, and the planting arm shafts 72, 73, 74 are linked in the transmission case 65 of the pipe bracket shape in this way, the planting mechanism 53 can be The power transmission structure is simplified, and the size and weight of the insertion mechanism 53 can be reduced and the manufacturing cost can be reduced.

In particular, by arranging the combined clutches 75, 76, 77 inside the respective rear end brackets 62, 63, 64, the assembly workability of the combined clutches 75, 76, 77 can be improved.

Each planting arm shaft 72, 73, 74 is connected to the middle part of the planting arm 80 with the planting claw 79 through the front side crank 81, and the rear end of the planting arm 80 is connected to the installation position by the rear side crank 83. The rear end portion of the support body 82 on the top of the rear end brackets 62 , 63 , 64 .

The combination clutches 75, 76, and 77 have the same structure, and the structure of the left combination clutch 75 will be described below. As shown in Figures 5-7, the combination clutch 75 can freely rotate on the planting arm shaft 72 to cooperate with the transmission gear (bevel gear) 84 that is linked to the drive shaft 67, and will pass through the transmission gear 84 and the planting gear. The arm shaft 72 is in the connected state or the disconnected state so that the clutch actuator 85 for clutch operation can be freely slidably arranged along the implant arm shaft 72, and the clutch actuator 85 and the inserting arm shaft are connected to each other by spline engagement. arm shaft 72 . In the figure, symbol 86 is a spline groove, symbol 87 is a spring for applying elastic force for applying elastic force to the clutch actuator 85 toward the transmission gear 84, symbol 93 is a bearing, symbol 94 is a bevel gear, and symbol 95 is a shaft support. body.

5 and 8, the transmission gear 84 forms an inclined tooth surface 89 at the end of the cylindrical gear body 88, and forms a part of the tooth surface 89 along the gear body at intervals along the circumferential direction. The axis of 88 is cut into two concave joints 90 .

On the other hand, as shown in FIGS. 5 and 9 , the clutch actuator 85 is formed at the end of the cylindrical actuator body 91 at intervals in the circumferential direction and protrudes along the axis of the actuator body 91 . 2 clutch pawls 92.

If the clutch actuator 85 applies an elastic force to the transmission gear 84 by the elastic force of the elastic force applying spring 87, and the clutch pawl 92 of the clutch actuator 85 is engaged by the engaging portion 90 of the transmission gear 84, the transmission gear 84 and the inserting The arm shaft 72 is in the connected state. On the other hand, if the clutch actuator 85 resists the elastic force of the elastic force applying spring 87 and moves away from the transmission gear 84, the clutch pawl 92 of the clutch actuator 85 and the transmission gear 84 are released. When the engaging portion 90 is engaged, the transmission gear 84 and the planting arm shaft 72 are in a disconnected state.

In this way, in this embodiment, since a part of the tooth surface 89 of the transmission gear 84 is integrally formed with the transmission gear 84, the engaging portion 90 to which the clutch pawl 92 of the clutch actuator 85 engages is formed. The member that engages with the clutch pawl 92 of the clutch actuator 85 can reduce the number of parts and reduce the size and weight of the combined clutches 75 , 76 , 77 .

Moreover, in this embodiment, since the engaging portion 90 is formed in a concave shape against the tooth surface 89 of the transmission gear 84, the engaging portion 90 can be formed simultaneously with the transmission gear 84 by precision casting, and the engaging portion 90 can be easily formed. Manufacturing cost can be reduced.

In addition, as shown in FIGS. 5-7 , the combined clutch 75 forms openings 96 and 97 formed by bulging processing at the front and rear of the rear end bracket 62 , and the opening 96 on the front side is inserted into the front and rear extension bracket 57 . At the rear end, a disc-shaped cover 98 is provided to cover the opening 97 on the rear side, and an opening 99 formed by bulging is also formed on the upper part of the rear end bracket 62. The clutch operating member support body 101 is used for connecting and disconnecting the combined clutch 75 .

The clutch operating member support body 101 forms a cylindrical embedded part 102 at the bottom, and the embedded part 102 is inserted into the opening 99 on the upper part of the rear end bracket 62, and the bracket 103 installed on the upper part of the rear end bracket 62 is fixed by a bolt 104 for fixing. Attachment, the columnar clutch operating member 100 is rotatably attached to the through hole 105 penetrating from the upper side to the lower side. Symbol 112 is a seal.

In this way, the opening 99 is formed on the upper part of the rear end bracket 62, and the clutch operating member supporting body 101 for supporting the clutch operating member 100 is installed in the opening 99, so that the transmission gear 84 and the clutch operating body 85 can be installed. After the planting arm shaft 72 is attached to the rear end bracket 62, the clutch operating member support body 101 on which the clutch operating member 100 is mounted is attached, thereby improving assembly workability.

And only need to pull down the clutch operation member supporting body 101, can carry out the component maintenance work that constitutes the combination clutch 75 such as transmission gear 84, clutch actuator 85, planting arm shaft 72, improve the maintainability of combination clutch 75.

In particular, the opening 99 formed by bulging is fitted into the embedded part 102 of the clutch operating member support body 101, thereby installing the clutch operating member support body 101 at the opening 99 of the rear end bracket 62, so the mounting accuracy can be improved. Since it is mounted using oil, etc., maintainability can be improved.

In the clutch operating member 100 , an operating claw 106 is formed at the lower end, and the operating claw 106 is engaged with a flange portion 107 of the clutch actuator 85 , and a clutch operating lever 108 is attached to the upper end. In the figure, reference numeral 109 is a spring for applying elastic force, reference numeral 110 is a fixing screw for applying elastic force, and reference numeral 111 is an adjustment plate.

In addition, as shown in FIG. 3 , each clutch operation member 100 is linked to an operation lever (not shown) arranged on the back side of the seedling planting table 47 via clutch operation cables 118, 119, 120, and each clutch operation cable The outer retaining sleeves 121, 122, 123 of 118, 119, 120 are mounted on each front and rear extension bracket 57, 58, 59, thereby installing each clutch operation cable 118, 119, 120 along each front and rear extension bracket 57, 58, 59, each Clutch operation cables 118, 119, 120 do not contact the rotating planting arm 80, the front and rear side cranks 81, 83 and the lateral transfer mechanism 78 moving left and right, the seedling loading platform 47 and the like.

When the clutch operating member 100 is rotated by the clutch operating lever 108, the operating pawl 106 pushes the flange portion 107 of the clutch actuator 85, and the clutch actuator 85 moves away from the transmission gear 84 against the elastic force of the spring 87 for applying elastic force. The direction of movement moves, and the engagement of the clutch pawl 92 of the clutch actuator 85 and the engagement portion 90 of the transmission gear 84 is released, so that the transmission gear 84 and the planting arm shaft 72 become disconnected.

In addition, a stop member 113 is installed on the clutch operating member support body 101 close to the planting arm shaft 72, and the stop member 113 is used to allow the clutch operating body 85 to move along the planting arm shaft only within the specified rotation angle range of the clutch operating body 85. 72 slides so that the transmission gear 84 and the planting arm shaft 72 are cut off, and the driving of the planting arm 80 is stopped.

That is, the stop member 113 is screwed toward the planting arm shaft 72 at a position immediately above the planting arm shaft 72 under the embedded portion 102 of the clutch operating member support body 101 , and extends in the circumferential direction on the end surface of the clutch operating body 85 . The engagement recess 114 in which the stopper member 113 engages is formed, and the both ends 115, 116 of the engagement recess 114 are formed in an inclined shape.

When the stop member 113 is engageable with the engagement recess 114 of the clutch actuator 85, that is, when the clutch actuator 85 is within a predetermined rotation angle range, when the clutch operation member 100 is rotated by the clutch operating lever 108, the The engagement recess 114 of the clutch actuator 85 engages the stop member 113, and the clutch actuator 85 moves along the planting arm shaft 72. On the other hand, when the stop member 113 cannot be engaged with the engagement recess 114 of the clutch actuator 85, That is, when the clutch operating body 85 is outside the predetermined rotation angle range, even if the clutch operating member 100 is rotated using the clutch operating lever 108, the stop member 113 is in contact with the end surface 117 of the clutch operating body 85, preventing the clutch operating body from rotating. 85 moves.

The prescribed rotation angle range of this clutch actuator 85 is as shown in Figure 10, is set to the rotation angle when the front end of planting claw 79 is in position above floating body 48 and planting claw 79 takes out the position of seedling from seedling-carrying platform 47 The rotation angle between the rotation angles at .

In this way, in the present embodiment, the stop member 113 is arranged on the combined clutch 75, and by the effect of the stop member 113, only when the rotation angle of the clutch actuator 85 is at the rotation angle when the planting claw 79 is located above the floating body 48 Allow the clutch actuator 85 to slide along the planting arm shaft 72 between the rotation angle at the position where the planting claw 79 is taken out of the seedling, so when the clutch 75 is actuated, the front end of the planting claw 79 will not be at the position Stop under the state of floating body 48 below, can prevent that planting claw 79 collides with field surface and road surface and damages, and can stop planting claw 79 under the state keeping rice seedling, do not waste rice shoot.

Furthermore, since the stop member 113 is provided near the planting arm shaft 72, the combined clutch 75 can be downsized as much as possible.

In particular, since the stop member 113 is installed on the clutch operating member support body 101, the clutch operation member 100 and the stop member 113 are installed on the same member (clutch operation member support body 101), and the positional accuracy between the two is improved, which can be carried out smoothly. Clutch operation of the clutch operating member 100 .

In addition, in this embodiment, the both end portions 115 and 116 of the engagement recess 114 provided on the clutch actuator 85 are formed in an inclined shape, so that the clutch actuator 85 can be smoothly engaged and stopped at the engagement recess 114. The member 113 makes the clutching and actuation of the combination clutch 75 proceed smoothly.

Possibility of industrial use

The present invention is carried out in the above-mentioned form, and the following effects can be obtained.

That is, in the present invention, a plurality of tubular front and rear extension brackets extending in the front and rear directions, tubular left and right extension brackets installed between the front ends of the front and rear extension brackets and extending in the left and right width directions, are connected to the rear ends of each front and rear extension brackets. The transmission box of the planting mechanism is formed into a pipe support shape by the tubular rear end bracket extending in the left and right width directions, so that the weight of the planting mechanism can be reduced, and the assembly workability can be improved, and the manufacturing cost can be reduced.

Moreover, the front ends of the drive shafts that are freely rotatably accommodated in the left and right extension brackets are interlinked with each other and are freely rotatably accommodated in the front ends of the drive shafts of the front and rear extension brackets, and the rear ends of the drive shafts are connected by a combined clutch. The planting arm shaft that is freely rotatably accommodated in the rear end bracket is connected in conjunction with the planting arm having the planting claws in conjunction with the planting arm shaft, so the power transmission structure of the planting mechanism can be simplified. Thereby, reduction in size and weight of the insertion mechanism and reduction in manufacturing cost can be achieved.

In addition, since the combination clutch is disposed on the rear end bracket, the assembly workability of the combination clutch can be improved.

In particular, the combined clutch is movably matched with the transmission gear connected to the drive shaft on the shaft of the planting arm, and a clutch actuator is freely slidably arranged along the shaft of the planting arm. The planting arm shaft is in the connected state or the disconnected state so that the clutch is actuated, and a stop member is arranged near the planting arm shaft to allow the clutch The actuating body slides, so that the transmission gear and the planting arm shaft are cut off, and the driving of the planting arm is stopped. Therefore, the combination clutch can be downsized as much as possible.

And because the clutch actuator is allowed to slide only when the rotation angle of the clutch actuator is between the rotation angle when the planting claw is located above the floating body and the rotation angle at the position where the planting claw takes out the rice seedlings, so when the clutch When actuating, the front end of the planting claw will not stop under the floating body, which can prevent the planting claw from colliding with the field surface and road surface and be damaged, and can stop the planting claw while keeping the seedlings, without wasting seedlings .

In addition, in the clutch actuator, an engagement recess that engages the stop member only within a predetermined rotation angle range of the clutch actuator is formed, and the end of the engagement recess is formed in an inclined shape, so that the rotating clutch can be actuated. The engagement recess of the body smoothly engages the stop member, and smoothly activates the combination clutch.

Claims (4)

1. A planting mechanism of a passenger rice transplanter, the walking body of the passenger rice transplanter is equipped with a running part at the bottom of the body support, and a prime mover is provided at the top of the front part of the body support, and the walking body The rear part of the planting machine can be connected up and down through the lifting mechanism, and the planting mechanism set on the planting machine is linked with the prime mover set on the walking body through the transmission shaft of the gearbox; it is characterized in that: The planting mechanism consists of a plurality of tubular front and rear extension brackets extending in the front and rear directions, tubular left and right extension brackets erected between the front ends of the front and rear extension brackets and extending along the left and right width directions, and connected to the rear ends of each front and rear extension brackets and along the The tubular rear end bracket extending in the left and right width direction forms a tube bracket-shaped transmission box; The front ends of the drive shafts that are freely rotatably accommodated in the front and rear extension brackets are linked and connected to each other by the interlocking shafts that are freely rotatably accommodated in the left and right extension brackets, and the rear ends of each drive shaft are connected through a combined clutch. A planting arm shaft freely rotatably accommodated in the rear end bracket is connected to the planting arm shaft, and a planting arm having a planting claw is coupled to the planting arm shaft, and the combination clutch is arranged on the rear end bracket. 2. The planting mechanism of passenger rice transplanter according to claim 1, characterized in that: the combined clutch has a transmission gear connected to the drive shaft, and the transmission gear is set to be able to cooperate with the planting arm shaft A clutch actuator is freely slidably arranged along the planting arm shaft, and the clutch actuator is used to perform clutch operation by making the transmission gear and the planting arm shaft into a connected state or a disconnected state, and the stop member Arranged near the planting arm shaft, the stop member is used to allow the clutch operating body to slide only within a predetermined rotation angle range of the clutch operating body, thereby making the transmission gear and the planting arm shaft in a disconnected state and stopping the planting. Arm drive. 3. The planting mechanism of a passenger rice transplanter according to claim 2, characterized in that: the stop member only has the same rotation angle as the planting claw when the rotation angle of the clutch actuator is above the floating body. The clutch actuating body is allowed to slip between the rotation angles at the position where the claws take out the seedlings. 4. The planting mechanism of a passenger rice transplanter as claimed in claim 2 or 3, characterized in that: the clutch actuator is formed with an engagement recess that engages the stop member only within the specified rotation angle range of the clutch actuator, The end portion of the engagement recess is formed in an inclined shape.

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