JPH01317320A - agricultural machinery - Google Patents

Abstract

PURPOSE:To prevent damaging trouble of parts by biting of foreign matter, etc., by providing safety clutch cutting transmission of driving force at unreasonable loading, in transmission path transmitting driving force to working part. CONSTITUTION:A mission case 10 of working part is connected to PTO shaft 70 through transmission shaft 71 and safety clutch 73. The safety clutch 73 is usually engaged by bracing force of spring and driving force is transmitted, but the engaging is released by a load larger than the bracing force of the spring and transmission of driving force is stopped. Control means for said bracing force of spring is sealed from outside by boot of rubber, etc.

Description

[Detailed description of the invention] “Industrial Application Fields” The present invention relates to agricultural machines such as rice transplanters.

[Prior art] A rice transplanter configured to drive the CIi platform moving device and planting rod in the planting work section using rotary power taken out from the prime mover installed in the 1rf section of the traveling machine via the traveling Mitsushimin 1 case. machine is being used. In this type of m-planter, power is transmitted by connecting the PTO shaft installed in the traveling transmission case and the human power shaft of the planting part mission case, which also serves as the machine frame of the planting work part, through a transmission shaft. There is a lot of trouble.

[Problems to be solved by the invention] In the +n planting machine, foreign objects such as plant stems may become entangled with the planting work section during work, increasing the load, and in order to forcefully drive this, the There was a problem that parts were damaged. Such problems also existed in agricultural machines other than the No. 11 planting machine, such as fertilizer applicators.

[Means for Solving the Problems] In order to solve the above problems, the present invention has the following configuration.

That is, the agricultural working machine according to the present invention is an agricultural working machine that extracts rotational power from a prime mover provided on a traveling machine body to drive a working part attached to the machine body, and the agricultural working machine according to 11ff provides a transmission for transmitting power from the prime mover side to the working part. A safety clutch is installed in the path, which is normally engaged by the biasing force of a spring to transmit power, but is disengaged and stops transmitting power when the load exceeds the biasing force of the spring. The present invention is characterized in that it is provided with an adjustment means that can adjust the biasing force of the spring, and that the adjustment means is sealed from the outside with a removable cylindrical boot.

[Function] When a heavy object becomes entangled with the working part and the load increases, the safety clutch is disengaged and the transmission of driving force to the working part is interrupted.

[Example] The embodiments shown in the drawings will now be described.

This agricultural machine is a walk-behind 1rl planter 1, and an engine 3 is arranged in the front of a traveling part transmission case 2, and a transmission case is placed on the side of the traveling part mission case 2 and can be rotated from 6 to 10F. Propulsion heavy wheels 7, 7, which are ground wheels that support the aircraft body, are attached to the rear end of the transmission case. Furthermore, a main frame 9 is provided rearwardly projecting from the rear of the running part case 2, and a planting part (working part) miss case 10 which also serves as a planting part 1 frame is provided at the rear end. .

A rear frame 12 is installed at the rear of the planting part mission case 14.
A seedling stand 17 is fixedly connected to the rear frame and is movably supported on the left side by a rail 15 and a support frame 16.A handle rod 1 is attached to the rear frame 1.
9 is provided. In addition, the planting department mission case l
O is provided with a lateral movement device I3 and a planting device 12, and the lateral movement device 13 reciprocates the 11゛i planting stand 17 to the left t-te, and also moves the planting rod 12a of the planting device 12. A predetermined trajectory is followed by 7 degrees, and a 10F movement is carried out, and the planting claw provided at the tip part divides and takes out the bacteria from the seedling mat held on the seedling stand 17, and plants them in the field. Although the illustrated device is a two-row planting device using a pair of left and right planting rods, it may be a four-row planting device or other devices.

A fuel tank 21 and a fertilizer tank 22 are provided in the negative part of the aircraft body. The fertilizer in the fertilizer tank 22 is delivered to a delivery pipe 24 by a delivery device 23, and is supplied to the field from the lower end of the delivery pipe. The F section of these machines is covered with a bonnet (body cover) 25, and a spare i:i'i stand 26 is further provided above it.

Further, a float 29 is rotatably mounted on the lower side of the fuselage via a support shaft 27. The front part of the float 29 is supported by an oil damper 28 which also serves as a float link so as to be freely movable downward.

A hydraulic unit 30 in which a hydraulic cylinder and a plurality of control valves are integrally assembled is provided on the -E side of the travel unit case 2. The hydraulic cylinder 31 of this hydraulic unit is a pitching cylinder for lifting and lowering the aircraft, and extends rearward from the base of the hydraulic unit. 1. A sliding body 34 urged backward by a spring 33 is fitted into the rear end of the piston rod 31a of the cylinder, and a link plate 35 is attached horizontally to the left 1j on the sliding body 34. . The left and right ends of the link plate 35 are connected to connecting rods 36 (L
, I+) is connected to the swing arm 38.38 which rotates integrally with the transmission case 6.6, and the left side of the fuselage is connected to the middle part of the left connecting rod 36 (+,). A low link cylinder 39 for J inclination and E adjustment is interposed.

The hydraulic unit 30 has control valves such as a switching valve 40 for the pitching cylinder 31, a switching valve 41 for the rolling cylinder, and a switching valve 40 for the oil sent from the pump.
A diverter valve 42 for distributing and supplying water to 41 is provided. Arm 44 provided on valve I valve 40a of pitching switching valve
The upper end of the detection rod 45 attached to the float 29 is connected to the float 29 . In addition, a support frame 47 is provided diagonally protruding from the F section of the hydraulic unit, and this is attached to the left side of the aircraft!
i. The tilt detection swing 7-48 swings left and right by 1".
3 is connected to a spool 41a of a direct rolling switching valve. 49 in the figure is the engagement/disengagement 1 that is fixed to prevent the f-48 from getting pregnant when the low link control is in the middle.
-07 Rolling Rock IITlb.

In this hydraulic unit 30, the switching valve 40°41 and the dividing valve 42 are located on the left side of the base of the cylinder 31! 7, and can be divided into a cylinder portion 30a and a valve portion 30b at a cross section indicated by A-A. A lower portion of the cylinder portion 30a is fixed to a rib 50 provided on the upper surface of the traveling portion transmission case 2 with a bolt 51. The return oil vibrator 53 of this hydraulic unit is installed vertically on the lower surface of the cylinder portion 30a, and by inserting it into the opening 54 provided on the upper surface of the transmission case 2, the return oil vibrator 53 is inserted into the traveling portion mission case 2 which also serves as an oil tank. It is now connected.

In addition, a stone-stepped support 60.60 is attached to the cylinder tube of the pitching cylinder 3, a planting part mix, and an in-case 1.
A guide rod 62, which is a rotation prevention member of the piston rod 31a, is provided in parallel with the pitching cylinder 31 between the support tool 61 protruding from the -F section of 0, and a guide block integrated with the sliding body 34. 63 is this guide lot 6
The rear end of the guide rod 61 is attached to the support 61 by a port 1a. It is provided on one side of the pair of left and right sight clutch arms 65, 65 which are provided at different levels on the back of the cylinder.When the cylinder is extended or contracted, it moves along the kite block 63 or the guide rod 62.
The piston rod 31a can move forward and backward. With such a configuration, the piston rod 31a has a double-supported beam structure, and the strength against bending can be increased. Further, since the piston rod 31a does not rotate around the axis, no torsional force or the like acts on the connecting rod 36.

Next, to explain the rotational power transmission device to the planting work section, the output of the prime mover 3 is shifted by a gear train in the traveling section transmission case 2, and is transmitted to the PTO shaft 70 protruding from the rear of the J-missi 1 case. Reportedly. P T O1t
A transmission shaft 7I is connected to h70, and a clutch 7
3 is interposed.

'υ Full clutch flow is used to manually disconnect the power transmitted from the human power shaft 74 to the drive bell gear 75, and the hollow @76 of the drive bell gear 75 is fitted to the human power shaft 74 so as to be able to rotate independently. A pelvis 78 having an engaging claw 78a on the front end surface is fixed to the outside of the hollow shaft 76. Further, an engaging member 80 having a claw 80a that engages with a claw 78a of the vf1 receiving plate pelvis is spline-fitted to the distal end of the human power shaft 74 so as to be freely slidable in the axial direction. A threaded portion 82 is provided at the 1) η portion of the human power shaft 74, and a nut 83 is screwed into the screw portion 82. A spring 85 is fitted between the washer 84 provided on the rear surface of the nut 83 and the direct engagement member 80 to press the engagement member 80.

The nut 83, washer 84, and spring 85 are connected to the human-powered shaft 7.
4) by a rubber boot 86 removably fitted onto the outer periphery of the 4.

The driving gear 75 meshes with the driven gear 87 inside the mission case 10. A hollow shaft 88 of the driven gear 87 is connected to a drive shaft 91 via a one-turn clutch 90 of Ichikawa that stops at a fixed position. A Subrocket]・93 is attached to this drive shaft load, and power is transmitted from here to the r′l′i・several lateral moving device side via a chain, and the planting rod 12 is moved by the power of the drive+d+91. It is designed to be driven. The one-piece transmission case 10 is formed so that it can be divided, and the position indicated by F is the mating surface during assembly.

Regarding the oil tamper 28 described in No. 1111, this damper 28 is installed below the engine 3 on the face of the aircraft, and prevents hunting of the upper drive of the aircraft, and also serves as a float link for suspending the float 29. This allows the conventional float link to be omitted and the number of structural members to be reduced.

As shown in FIG. 7, this tamper 28 includes a cylinder 90 and a piston rod q2, which are partitioned on the left by a piston 9I. It is a small structure. 101 part 92
Open to left no. 1 of piston 91 [open to 1 L1!14
．． 95 is drilled. There is also an opening 11 at the inner end of the core rod 1-93! +7,911.9! i is drilled. Opening 1)7.・ill is provided on the no-j side of the piston 91 at a position overlapping the opening 94 of the cylindrical portion 92, one opening 97 is formed as a small diameter opening, and the other opening 98 is formed as a large diameter opening. has been done. Opening 9
9 is located on the left side of the piston 91 and opens the cylindrical portion 92 [1].
A hole having the same diameter as the direct opening 98 is bored at a position overlapping with the opening 95 . Further, a through hole 100 connecting the opening 99 on the left side of the piston 91 and the openings L-197 and 98 on the right side is bored. Note that damper oil is accommodated in the silicator 90.

A lever 102 is fixed to the outer end of the core rod 93, and is connected by a wire 104 to a planting clutch lever 103 provided on the machine body. When the planting clutch lever 103 is rotated to the entry side (in the direction of arrow X) to start the planting work, the lever 102 is pulled by the inner wire and rotates, and the large diameter opening 98 opens on the right side of the cylindrical portion 92. The core rod 93 rotates relative to the cylindrical portion 92 so as to overlap the opening 94 of the cylindrical portion 92 .

Therefore, the hole that communicates the left and right sides of the piston 9I has a large diameter, making it easier for oil to move between the left and right sides of the piston 91, allowing the piston 91 to move left and right relatively quickly. Therefore, the resistance to vertical movement of the float 29 is reduced.

Also, when turning the clutch lever 10:1 to stop the planting work when turning, etc., the clutch lever 10:1 is rotated in the direction opposite to the arrow
The core rod 93 rotates in the opposite direction, and the small diameter opening [197
overlaps with the opening [194 of the cylindrical portion 92, so the oil passage to the left and right of the piston is reduced at this position, and as a result, the resistance to the left and right movement of the old piston increases, and the speed of the vertical movement of the float 29 is regulated. It becomes like this.

To explain the operation of this Ffl planting machine 1, during planting work, the height of the field is detected by the vertical movement of the detection rod 45 attached to the float 29, and the pitching switching valve 40 is switched according to the stiffness. pitching cylinder 3
1 performs the expansion and contraction operation. Then, the connecting rod 36 (L, R
), the swing arms 3B and 38 are rotated back and forth, and the left and right propulsion IL wheels 7 and 7 simultaneously move up and down by the same amount with respect to the machine body, and as a result, the machine body moves up and down to adjust the planting depth. It is designed to be held constant.

In addition, the pendulum 48 detects the tilt of the aircraft in the left and right direction, and the rolling switching valve 41 is switched accordingly.
The rolling cylinder 39 performs an expansion and contraction operation. Then,
The left swing arm 38 is rotated, and only the left propulsion wheel 7 (L) moves up and down with respect to the fuselage, thereby correcting the horizontal inclination of the fuselage.

If, for example, a foreign object gets entangled with the planting rod or the rail of the R6 platform 17 during the planting operation and the load increases, the safety clutch 73
The engaging member 80 is pushed back by overcoming the biasing force of the spring 85, and is disengaged from the pelvis 78. As a result, the rotational power of the human power shaft 74 is no longer transmitted to the drive shaft 91, and the driving of the planting section is stopped. F. Therefore, no excessive force is applied to each member of the planting section, and damage to the parts can be prevented.

[Effects of the Invention] As explained above, the 73 working machine according to the present invention is provided with a safety clutch that cuts off the power transmission when an excessive load is applied to the transmission path that transmits the power to the working part. As a result, it has become possible to effectively prevent damage to parts due to jamming of parapets, etc.In addition, the strength of the spring that determines the operating load of the safety clutch can be adjusted as appropriate by adjusting the spring strength to determine the operating load of the safety clutch. Since the adjustment means can be adjusted, adaptability to usage conditions is improved, and the adjustment means is covered with a removable boot, which prevents muddy water etc. from adhering to the adjustment means.
As a result, it has become possible to always maintain favorable conditions.

4. Contact surface of the drawings FIG. 1 is a side view of one example of the agricultural machine according to the present invention, and FIG.
The figure is a plan view, Figure 3 is a side view of the main parts, Figure 4 is a rear view, Figure 5 is a hydraulic circuit diagram of the aircraft control system, Figure 6 is a sectional view of the planting part mission case, Figure 7(a),
(b) and (c) are a longitudinal sectional view of the damper, an SS sectional view, and an explanatory diagram of the interlocking structure.

l...Walking type]■Planting machine, 2...Traveling part mission case, 10...Planting part mission case, 28...
Damper, 30... Hydraulic unit, 31... Pitching cylinder, 39... Rolling cylinder, 53...
・Return oil vibe, 62...Guide rod, 65...
Side clutch lever 173...Safety clutch, 85
...Spring, 86...Boots.

Patent applicant: Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] (1) In an agricultural machine that extracts rotational power from a prime mover installed in a traveling machine body to drive a working part attached to the machine body, a biasing force of a spring is applied in the transmission path that transmits power from the prime mover side to the working part. A safety clutch is provided that is normally engaged to transmit power, but disengages and stops transmission of power when the load exceeds the biasing force of the spring, and the biasing force of the spring can be adjusted. 1. An agricultural working machine characterized in that the adjusting means is provided with an adjusting means, and the adjusting means is sealed from the outside with a removable cylindrical boot.