JP2007166997A - Agricultural working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural working machine in which the transmission case of a land-leveling device is upward disposed to reduce the angle of a shaft transmission means extended from the rear portion of a travel machine frame and enlarge the movable range of the land-leveling device. <P>SOLUTION: The transmission case 40 for supplying a power to the land-leveling device 30 is disposed directing upward, and a power from the travel machine frame 1 is transmitted to the land-leveling device 30 through the shaft transmission means 43, a gear received in the transmission case 40 and right and left transmission members 37, 38. In the land-leveling device 30, cage type rotors 32a, 33a, 34a pivotally supported on land-leveling portions 32, 33 and 34 are rotated and contacted with the surface of a paddy to level the paddy. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an agricultural work machine including a leveling device in front of a planting device, and more particularly to an arrangement structure of the leveling device.

  Conventionally, a riding rice transplanter in which a planting device is attached to the rear part of a traveling machine has been put to practical use as an agricultural machine used to plant seedlings in a field. Some of these riding rice transplanters have a leveling device that can be moved up and down at the front part of the planting device. This planting can be done by flattening the field with the leveling device before planting the seedling. Is improved (Patent Document 1).

  According to the above, the planting device and the leveling device are connected to the rear part of the traveling machine body through the lifting link mechanism by the hydraulic control device so as to freely move up and down, and the traveling machine body traveling on the field passes over the unevenness of the cultivating surface. Even if it moves up and down, the planting device and the leveling device are controlled so that the height from the field can be maintained constant.

  In general, the bottom of the planting device is provided with a float that comes into pressure contact with the field scene, and the planting device is moved up and down by the action of a hydraulic control device in accordance with the rising / lowering of the float to increase the planting depth of the seedling. It is kept constant. Here, the rear end side of the float is pivotally supported, and the tilt angle of the float with respect to the field scene is adjusted by mechanically raising and lowering the front end side. And by adjusting the float inclination angle with the hydraulic control device according to the front and rear inclination angle of the traveling aircraft, the softness of the farm scene, the planting speed, etc., the seedling can be planted stably at a certain planting depth Yes.

Japanese Patent No. 2972038

  The said hydraulic control apparatus has taken the control system which detects the distance from a rice field with the float attached to the lower part of the planting apparatus, and raises / lowers a raising / lowering link by expanding / contracting a hydraulic cylinder based on the detection result. In this control method, in order to shorten the total length of the rice transplanter, it is desirable to obtain the front surface information as much as possible and raise and lower the planting device with the minimum control amount, but the leveling device is in front of the detection float. There is a limit to moving the detection float forward.

  As a countermeasure, it is possible to move the detection float to the front by moving the entire leveling device to the front side of the traveling machine, but in this measure, the distance between the PTO shaft of the traveling machine and the leveling device is increased. As a result, an unreasonable force is generated in the power transmission mechanism such as a transmission shaft that transmits power to the leveling device, which includes new technical issues such as lack of durability of the power transmission mechanism. .

  Therefore, an object of the present invention is to provide an agricultural work machine in which a transmission case of a leveling device is arranged upward and power is transmitted to the leveling device via a gear housed in the transmission case.

In order to achieve the above object, the present invention according to claim 1 is provided with a traveling machine body (1) equipped with an engine and traveling by power of the engine;
A planting device (20) supported by the traveling machine body so as to be movable up and down;
A leveling device (30) disposed between the traveling machine body and the planting device and supported to be moved up and down in conjunction with the planting device,
Agricultural work in which power from the engine is transmitted to the leveling device (30) through shaft transmission means (43) having a transmission shaft (44) and a joint (45) extending from the rear of the traveling machine body. In the machine
A gear housed in a transmission case (40) disposed above the leveling device (30) in conjunction with the shaft transmission means (43);
A transmission member (37) interposed between the gear and the leveling device (30),
It is in the agricultural work machine characterized by this.

According to a second aspect of the present invention, the planting device (20) has at least three floats (26, 27, 28) suspended from the planting device body and arranged in parallel in the left-right direction. The float at the center of the float is a detection float (26) for detecting the height of the planting device from the surface, and the detection float has a long configuration extending forward from the other floats,
The leveling device (30) has at least three leveling rotors (32a, 33a, 34a) arranged in parallel in the left-right direction, and a central leveling rotor (32a) located in front of the detection float (26). ) Is displaced forward from the other leveling rotors (33a, 34a), and the other leveling rotor is arranged to overlap the detection float front part (26a) in a side view,
The case (40) is disposed above the center leveling rotor (32a), and power is transmitted to the center leveling rotor via the gear and the transmission member (37). Power is transmitted from the side end to the other ground leveling rotors (33a, 34a) via the second transmission member (38).
It exists in the agricultural working machine of Claim 1.

  The reference numerals in the parentheses are for reference to the drawings and do not limit the present invention.

  According to the first aspect of the present invention, since the transmission case is disposed above the leveling device, the angle of the shaft transmission means extending from the rear of the traveling machine body is reduced, and the performance and durability of the joint can be improved. In addition, it is possible to improve the performance of the leveling device by increasing the movable range of the leveling device.

  According to the second aspect of the present invention, the detection float can be extended to the front, and the leveling performance by the leveling device can be improved while maintaining high detection performance by the detection float. .

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 4 show an embodiment of the present invention, and FIGS. 1 and 2 are a plan view and a side view, respectively, showing a riding rice transplanter as an agricultural work machine. The riding rice transplanter includes a traveling machine body 1, a planting device 20 connected to the rear of the traveling machine body via a lifting link 15 so as to be lifted and lowered, and a leveling device 30 suspended on the planting device.

  An engine serving as a power source for the agricultural working machine is mounted on the front portion of the traveling machine body 1, and the engine is covered with a bonnet 2. Front steps 3, 3 project from the left and right sides of the bonnet 2, and a cab 6 having a seat 5 is provided behind the bonnet 2. A steering handle 7 is erected in front of the cab 6 and various operation levers necessary for driving operation are provided. The floor surface of the driver's cab 6 is formed by the step 8 connected from the front step 3, and the seedlings formed flatly higher than the step 8 on the left and right rear sides of the body cover 10 covering the lower part of the seat 5 are formed. Supply steps 11, 11 are provided.

  Conveyors 12 and 12 for replenishing seedlings to the planting device 20 are attached to the side of the traveling machine body (the outer position of the front step 3) that is the left and right sides of the bonnet 2. Here, the reserve seedling used for rice planting is a box seedling planted in a mat shape, and a seedling planted in a curing rice field or the like is used for a planting device.

  In the side surface of the riding rice transplanter shown in FIG. 2, the conveyors 12 and 12 are fixed via stays 13 that protrude vertically upward from the left and right sides of the traveling machine body 1. It is possible to have two modes: a deployed posture developed in a substantially straight line as viewed and a folded posture in which the front portion of the conveyor is folded onto the rear conveyor. The top surface of the conveyor 12 can be used not only for replenishment of spare seedlings but also as a surface for placing spare seedlings. Have taken. The front end of the conveyor 12 has a height at which it is easy to supply the spare seedling from the ridge, and the rear reaches the upper vicinity of the seedling supplying step 11 so as to be close to the seedling mounting base 21 of the planting device 20.

  The traveling machine body 1 can freely travel in the field by driving the traveling wheels 14F and 14R attached to the side of the machine body by engine power. In addition, a planting device 20 and a leveling device, which are work machines, are provided at the rear of the machine body. A PTO output shaft for transmitting power to 30 is provided in a projecting manner, and can be transmitted to each work machine via shaft transmission means 43 described later. The planting device 20 and the leveling device 30 are configured by an upper link 15a and a lower link 15b that are pivotally supported substantially in parallel from the rear center of the traveling machine body 1 and a hydraulic cylinder 15c that is pivotally supported from above the rear part of the traveling machine body 1. It is connected via a lift link 15 that can be raised and lowered. The lift link 15 maintains each working machine at a certain height from the surface by expanding and contracting the hydraulic cylinder 15c by a control means described later.

  Then, the planting apparatus 20 is demonstrated. The planting device 20 has a seedling stage 21 that can place preliminary seedlings in parallel on the upper part, and a planting part 22 that plantes seedlings placed on the seedling stage 21 on the rice field in the lower part. have. The seedling platform 21 is divided into a number of rice planting ridges, and is curved in an arc shape when viewed from the side, so that the preliminary seedling placed above is naturally supplied to the planting unit 22 by the action of gravity. Have. A planting rod 22a is attached to the lower part of the planting part 22, and the power from the traveling machine body 1 is transmitted through the drive shaft 23 and the joint 24 to rotate, so that one seedling is obtained for each stock. Rice planting proceeds while scraping off.

  Furthermore, three floats 26, 27, and 28 that press-contact the rice field between the planting rods 22a are swingably attached to the lowermost portion of the planting device 20. Each float 26, 27, 28 has a warped shape in which the front width swells in the left-right direction to level the field, and the front height warps upward in a side view, and can follow the unevenness of the field. It has a shape.

  The front end of the central float 26 has a length that extends forward from the other floats 27 and 28, and a detection lever 29 is pin-coupled to the front end of the float 26, It is a mechanism that transmits the vertical movement of the float front end due to the unevenness to a hydraulic control valve (not shown). From this action, the central float 26 is a detection float.

  Next, the leveling device 30 according to the present invention will be described. A leveling device 30 hanging from the planting device 20 is attached in front of the floats 26, 27, and 28, and a lower portion of the leveling device 30 is in contact with the rice field (see FIGS. 2, 3, and 4). . The leveling device 30 is attached via a support rod 31 so as to be movable up and down from the planting device 20 in the vicinity of the connecting portion between the lifting link 15 and the planting device 20, and is lifted and lowered by a lifting operation lever (not shown). Can do.

  The leveling device 30 is divided into three parts, and is connected to the central leveling portion 32 disposed in front of the detection float 26 and in parallel with the planting device 20, and the left and right rear ends of the central leveling portion 32. 27 and 28, and left and right leveling portions 33 and 34 located in front of each other. In the center leveling portion 32, a cage rotor 32a having a polygonal cross section is rotatable to the front portion of the right transmission member 37 and the front portion of the left transmission member 38 (second transmission member) via the rotary shaft 32b. The upper surface of the squirrel-cage rotor 32a is covered with a rotor cover 32c extending over both transmission members 37 and 38. In addition, saw-tooth teeth are formed on the portion of the cage rotor 32a that comes into contact with the rice field so that the rice field can be easily stirred by rotation (see FIG. 4).

  Similarly, the left and right leveling portions 33, 34 are such that the cage rotors 33a, 34a are rotatably attached to the rear portions of the left and right transmission members 37, 38 with the rotary shafts 33b, 34b, and the cage rotors 33a, 34a. Is covered with rotor covers 33c and 34c.

  These leveling devices 30 are arranged such that the rear edge of the center leveling portion 32 and the front edges of the left and right leveling portions 33 and 34 overlap in a side view, and are convex in a plan view (see FIG. 4). ). That is, while the rotary shafts 33b and 34b of the left and right leveling portions 33 and 34 are located on the same line, the rotary shaft 32b of the central leveling portion 32 is offset forward from the rotary shafts 33b and 34b. . Further, the front end portion of the detection float 26 is arranged so as to overlap with the axis lines of the left and right leveling portions 33 and 34.

  A transmission case 40 projects upward from the front portion of the transmission member 37 on the right side of the center leveling portion 32, and the upper end of the transmission case 40 is supported by a lower link 15 b of the elevating link mechanism 15. 41 is supported. Inside the transmission case 40, a gear (not shown) is engaged, and the power transmitted by the shaft transmission means described below is transmitted to the rotary shaft 32b. The power transmitted to the rotary shaft 32b is transmitted to the rotary shaft 34b of the right leveling portion 34 through the gear and drive chain in the transmission member 37, and the leveling rotor 34a is rotated.

  On the other hand, in the transmission member 38 (second transmission member) on the left side of the leveling portion 32, the power transmitted to the transmission case 40 is transmitted to the rotary shaft 32b, via a gear and a drive chain attached to the rotary shaft 32b. Thus, the rotary shaft 33b supported behind the second transmission member 38 is rotated (see FIG. 3).

  Power is supplied to the upper part of the transmission case 40 via shaft transmission means 43 connected to the power transmission unit 16 provided at the rear part of the traveling machine body 1. The shaft transmission means 43 is connected to the PTO shaft of the power transmission unit 16 and is composed of a transmission shaft 44 that is extendable in its entire length and a joint 45 that swings and transmits power.

  Then, the effect | action of the agricultural working machine comprised by the above is demonstrated.

  Prior to the work, in the agricultural work machine in the field, the elevating link 15 is operated to lower the planting device 20, but the control mechanism between the elevating link 15 and the detection float 26 detects the planting device 20 as it descends. The float 26 detects the distance from the rice field, and the planting device 20 is maintained at a height suitable for rice planting. In this state, the operation lever of the leveling device 30 is operated, and the height of the leveling device 30 is set so that the rice field is suitable for rice planting.

  Next, when the traveling machine body 1 travels and the rice planting work begins, the planting device 20 and the leveling device 30 are supplied with engine power from the traveling machine body 1 through the transmission means 43 and the like, and the planting work proceeds. In addition, just before the planting device 20, the leveling of the field is advanced by the leveling device 30.

  Next, when the traveling machine body 1 that continues traveling while planting in the farm field moves downward by traveling on the concave surface of the cultivator surface, the front end of the detection float 26 detects the inclination of the rice field and moves upward. Lifted to. Then, the detection float operates the hydraulic valve that controls the hydraulic cylinder 15c via the detection lever 29 attached to the front end, and shortens the hydraulic cylinder 15c. Thereby, the raising / lowering link mechanism 15 is pulled up, and the planting apparatus 20 will raise. By this raising operation, the detection float 26 attached to the planting device 20 is also raised, so that the detection float 26 is returned to the horizontal state. The detection float 26 returned to the horizontal state operates the hydraulic valve again to stop the operation of the hydraulic cylinder 15c, and the raising of the planting device 20 is completed. As described above, the planting device 20 continues to be controlled so as to be able to maintain a certain height from the surface by controlling the lift link 15 by detecting the inclination of the detection float 26.

  As described above, in the present invention, the leveling device 30 is divided into three parts, the leveling unit 32 at the center is moved forward, and the transmission case 40 for transmitting power to the leveling device 30 is moved above the leveling device 30. As a result, the shaft transmission means 43 connected to the traveling machine body 1 is linearly oriented. As a result, no excessive force is generated in the shaft transmission means 40, durability is improved, the movable range of the leveling device 30 can be expanded, and the front end of the detection float 26 that detects the height of the surface is provided. By extending forward, it is possible to obtain more frontal surface information from the planting device 20, and it is possible to optimally perform the lifting control of the lifting link 15.

  Finally, the embodiment according to the present invention described above describes the best mode of an agricultural working machine having a planting device and a leveling device as one embodiment, and the idea of the present invention is widely used in the field. It is added that it can be diverted to a working machine.

It is a top view of the agricultural working machine with which the planting apparatus was connected. It is a side view of the agricultural working machine with which the planting apparatus was connected. It is the side view to which the cross section of the leveling apparatus was expanded. It is a top view of a leveling device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 15 Lifting link 15c Hydraulic cylinder 20 Planting device 26 Detection float 26a Detection float tip 27, 28 Left and right float 30 Leveling device 32 Central leveling part 33, 34 Left and right leveling part 32a, 33a, 34a Cage type rotor 32b, 33b, 34b Rotary shaft 37 Transmission member 38 Second transmission member 40 Transmission case 43 Shaft transmission means 44 Transmission shaft 45 Joint

Claims (2)

A traveling machine body that is equipped with an engine and travels by the power of the engine;
A planting device supported by the traveling machine body so as to be movable up and down;
A leveling device disposed between the traveling machine body and the planting device and supported by raising and lowering in conjunction with the planting device,
In the agricultural work machine formed by transmitting the power from the engine to the leveling device via a shaft transmission means having a transmission shaft and a joint extending from the rear of the traveling machine body,
In conjunction with the shaft transmission means, a gear housed in a transmission case disposed above the leveling device;
A transmission member interposed between the gear and the leveling device,
Agricultural work machine characterized by that. The planting device has at least three floats suspended from the planting device main body and arranged in parallel in the left-right direction, and the float in the center of these floats has a height from the surface of the planting device. A detection float to be detected, and the detection float has a long configuration extending forward from the other floats;
The leveling device has at least three leveling rotors arranged in parallel in the left-right direction, and a central leveling rotor located in front of the detection float is displaced forward from the other leveling rotors. And arranging the other ground leveling rotor so as to overlap the detection float front side view,
The case is disposed above the central leveling rotor, and power is transmitted to the central leveling rotor via the gear and the transmission member, and a second transmission member is provided from a side end of the central leveling rotor. Power transmitted to the other leveling rotor via
The agricultural work machine according to claim 1.

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