JPS59113817A - Combine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a harvester equipped with an automatic cutting height adjustment device.

The automatic cutting height adjustment device detects the height of the cutting section above the ground, and raises and lowers the cutting section based on the detection result to keep the cutting height constant. This automatic cutting height adjustment device is configured to change the cutting height by raising and lowering the dead zone of the automatic cutting height adjustment for the cutting section depending on the growth status of the culm, field conditions, etc. The dead zone is simply raised and lowered by raising and lowering the entire automatic height adjustment device relative to the reaping section, so the dead zone width during low mowing is the same as the dead zone width during high yield, and the reaping section is close to the ground surface. Even when the cutting height is lower than a predetermined value and the cutting section needs to be raised during low cutting, the control is the same as when cutting at high interest rates, so the control is delayed due to the wide dead zone width and the cutting is delayed. There was a risk that the blade would plunge into the soil.

The present invention has been made in view of such circumstances, and has a configuration in which the width of the dead zone is different between low cutting rates and high cutting rates.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to drawings showing embodiments thereof, with the aim of providing a harvester that improves the accuracy of automatic cutting height adjustment and prevents unexpected accidents.

FIG. 1 is an external perspective view of a harvester according to the present invention. In the figure, a Kq reaping section is shown, and this reaping section is equipped with a divider iI.
! , lr, a shell culm pulling device 2, a cutting blade 3, etc., and divides the shell culm.

1r, lifted by the lifting device 2, harvested by the cutting blade 3, and sent the cut culm to the threshing section Z via the upper and lower conveying devices (not shown), and further through the vertical conveying chain 4. It is supposed to be done. A detection section X of a cutting height sensor that detects the height of the cutting section from the ground is provided at the lower right side of the cutting section.

FIG. 2 is a right side view of the detection section X of the cutting height sensor, and FIG. 3 is a perspective view thereof from the rear right side. There is a moth on the mounting rod 5 of the cloth side deno (Ida 1) located at the lower tip of the reaping part.
A guide shaft 11 is screwed upward substantially vertically, and an annular slider 12 is slidably fitted onto this guide shaft 11. Four spring receivers 13 are attached to the upper end of the guide shaft 11, and a push spring 20 is attached to the guide shaft 11 between the spring receivers 13 and the slider 12, and urges the slider 12 downward. are doing.

A cylindrical mounting part 12a with its axial direction in the left-right direction of the machine body is protruded from the front part of the slider 12, and two sensor arms 14 are provided on both the left and right sides of the mounting part 12a.
．． The front end portions of the sensors 14 are rotatably supported, and are located on the left and right sides of the left and right sensor arms 14.14Ii mounting rods 5, respectively.

Each sensor arm 14.14 has a front part 14a which is bent rearward and downward from the shaft support at the front end and extends in a straight line, and whose rear end is gently curved rearward, and which is connected to the front part 14a. It becomes almost horizontal and the rear end is tilted at an acute angle 6
It consists of an intermediate part 14b bent at about 0 degrees, and a rear part 14c that is connected to the rear end of the intermediate part 14b, is substantially parallel to the front part 14a, and extends linearly in the upper front direction. The left and right sensor arms 14 .
The fourteen intermediate portions 14b, 14b are arranged such that the distance between their rear ends is greater than the distance between their front ends.

The rear end of each sensor arm 14.14 extends to the upper front, with the front side facing forward and both 7 lunges up.

Both upper and lower 7 lunges of a U-shaped bracket 15 positioned on the lower side and extending rearward are vertically inserted and screwed to the upper 7 langes. A stopper 19 is attached to the bottom of the lower flange, and the sensor arm 1
4.14 rotates downward by a predetermined amount, the stopper 19 comes into contact with the mounting rod 5, prohibiting further downward rotation of the sensor arm 14.14, and the push-pull wire 30 described later
This prevents excessive force from being applied to the parts. Bracket 1
A vibration isolating rubber 16 is provided on the rear side of the sensor arms 14 and 5, and the vibration isolating rubber 16 absorbs shocks and vibrations of both sensor arms 14 and 14. A piece of L-shaped connecting member 17 is brought into contact with the rear side of the vibration isolating rubber 16.
Cube of bracket 15, anti-vibration rubber 16 and connecting member 1
A screw is inserted into one piece of 7 to fix them together.

The other piece of the connecting member 17 is located on the left side and extends rearward, and the lower end of the first link element 6 is pivotally supported on the left side of the other piece. The upper end of the first link element 6 is pivotally supported by one end of a second link element 7, and the other end of the second link element 7 is connected to a rotation shaft 8 whose axial direction is the left-right direction of the aircraft. It is fixed to the right end on the outside.

. The central portion of the rotation shaft 8 is fitted into a cylindrical support tube 25 so as to be freely movable, and the lower side of the support tube 25 is fixed to the upper surface of the seven flange of the support bracket 26 .

The support bracket 26 is made of angle material, and its 7
The lunge is horizontal and located on the lower side, the queso is vertical and located on the front side, and the support member is fixed to the support rod 9 that supports the lifting device 2, etc. installed upright on the mounting rod 5. 27
The front surface of the cube is fixed to the rear surface. The support member 27 has a forward U-shape, and its tip is fixed to the support rod 9.

The left end of the rotating shaft 8, which projects leftward from the support tube 25, is fixed to one end of the connecting piece 28, and a connecting sleeve 29 is rotatably attached to the other end. The lower end of the inner wire 30a of the push-pull wire 30 is connected to the connecting sleeve 29. push pull wire 3
o consists of an inner wire 30a located inside and a sleeve (actor wire) 30b slidably attached to the inner wire 30a, and the lower end of the sleeve 30b is slightly raised above the lower end of the inner wire 30a. It is attached and fixed to the back of the device 2.

The upper end of the push-pull wire 30 is routed close to the driver's seat.

Therefore, when the sensor arm 14.14 rotates upward (or downward), the first link element 6 is pushed (or pulled) forward (or backward downward) and the rear of the second link element 7 is pushed upward (or downward). The rotating shaft 8 rotates clockwise (or counterclockwise) when viewed from the left side of the machine, and the connecting piece 28 also rotates clockwise (or counterclockwise). and press (or pull) the inner wire 30a of the push-pull wire 30 upward (or downward).
do. In this case, the sleeve 3 of the push-pull wire 30
Since the sleeve 0b is able to slide t/i on the inner wire 30a and its lower end is fixed to the rear surface of the device 2ψ, the sleeve 30 can be moved against the movement of the inner wire 30a.
b is not affected in any way and remains stopped.

With this structure, the width of the dead zone is different between when the mowing is high and when mowing is low, as will be described later.

Figure 4 is a perspective view from the rear right side of the electric signal converter Y installed near the driver's seat and connected to the detector X by a push-pull wire 30, Figure 5 is a right side view thereof, and Figure 6 is the operation FIG. 3 is a schematic plan view of the vicinity of the seat.

The electric signal converter Y is disposed within the auxiliary column 39 located between the driver's seat 60 and the reaping conveyance section, and is located in the middle of the lower right side of the support plate 31 vertically suspended within the auxiliary column 39. Screw the bracket so that both 7 lunges of the U-shaped fixture 32 face to the right when viewed, and attach the 2 bolts to the fixture 32.
The sliding rods 33 and 33 of the book are fixed in the middle so that the sliding rods 33 and 33 are parallel to each other upward and downward, and the front end is slightly lower than the rear end. A connecting block 34 is slidably fitted in front of the sliding rods 33, 33, that is, in front of the fixture 32, and the upper end of the sleeve 30b of the push-pull wire 30 is fixed to the connecting block 34. ing. A lower end of a dogleg-shaped connecting link 35 is pivotally supported on the left side surface of the connecting block 34, and a bent portion at the center of the connecting link 35 is pivotally supported on the right front upper part of the support plate 31.

Furthermore, the upper end of the connecting link 35 is connected to the connecting rod 3 that extends upward and forward.
It is pivoted to the lower end of 6. The upper end of the connecting rod 36 is pivotally supported in the middle within an auxiliary column 39, and is pivoted to the rear of a connecting piece 37 that extends in the front-rear direction and can swing up and down. A lever 38 is fixed, and the upper part of the adjustment lever 38 protrudes from the upper surface of the auxiliary column 39. The adjustment lever 38 is rotatable in the front-back direction, and is configured to be latched at several locations in the front-back direction. When the connecting piece 37 is rotated downward (or forward), the rear part of the connecting piece 37 is rotated downward (or upward) to press and move the connecting rod 36 backward and downward (or upwardly forward) in its axial direction, and the upper part of the connecting link 35 is moved. The lower part of the connecting link 35 is rotated forward (or backward) by rotating backward and downward (or upward and forward), and the connecting block 34 is moved forward (or backward). Therefore, since the sleeve 30b attached to the connecting block 34 is pressed (or pulled) forward (or pulled) and moves forward (or backward), the sleeve 30b is attached to the lower end of the inner wire 30a, i.e. It moves in a direction toward (or away from) the sensor arm 14.

However, due to the force, the lower end of the sleeve 30b is fixed to the back of the pulling device 2, so the sleeve 30b does not move, and the inner wire 30a moves relatively, causing the sleeve 30b to move.
The part of the inner wire 30a that extends from the fixed lower end of the sleeve 30b due to the pressure (or pull) of the sleeve 30b is
This causes the sensor arm 14 to move further away (or advance) from the sleeve 30b, and eventually the sensor arm 14 will move upward (
or downward).

A limit switch 4o is provided on the left side of the support plate 31 in the movement range of the connecting rod 36, and an operating piece 36a is provided in the middle of the connecting rod 36, so that the adjustment lever 38 can be rotated to the rearmost position. When the connecting block 34 moves to the rearmost position and the sensor arm 14 is pulled to the uppermost retracted position, the actuating piece 36a comes into contact with the limit switch 4o and turns on. Automatic adjustment of cutting height is prohibited.

A sliding block 41 is slidably attached to the rear of the sliding rod 33, 33, that is, to the rear of the fixture 32. The front part of the sliding block 41r/i is formed to protrude toward the right side of the body, and the sliding rod 33° 33 passes through the left side of the block upwardly and downwardly. Further, the inner wire 30a of the push-pull wire 3o is inserted through the left side of the sliding block 41, and is screwed onto the rear surface of the sliding block 41.

The rear surface of the mounting tool 32 of the sliding rods 33, 33 and the sliding pro'tock 4
Coil springs 42 and 42 for biasing the Ii sliding block 41 rearward are fitted between the front surface and the front surface, respectively.
Furthermore, a coil spring 43.43, which biases the I''i sliding block 41 forward, is located between the rear surface of the sliding block 41 and the spring receivers 46, 46 provided at the rear ends of the sliding rods 33, 33.
43 are respectively bottomed, and coil springs 43.4
3, the sliding block 41 is urged forward to urge the sensor arm 14°14 downward, and the coil spring 4
2°42 The position of the sliding iron 241 is stabilized.

A switch box 44 for automatic cutting height adjustment is provided above the sliding block 41.

The switch box 44Ii has two photoelectric switches built in, and one of the photoelectric switches is selectively operated by rotating the operating rod 45 located on the right side, and the rear lower part of the support plate 31 is moved to the right side. The switch box 44 is attached to the left side of the downwardly bent portion, and the two photoelectric switches in the switch box 44 are selectively activated by the rotation of the switch box 44. The operating shaft 47 is made to protrude to the right of the switch box 44 and further to the support plate 31, and the upper end of the operating rod 45 is fixed to the right end of the operating shaft 47 and hangs downward.
The operating rod 45 is urged forward so that the lower end of the lever 5 comes into contact with the front right side of the sliding block 41. Then, when the sliding block 41 moves backward (or forward) by a predetermined amount or more and the operating rod 45 rotates backward (or forward) by a predetermined amount or more,
When the operating shaft 471/'i rotates, the photoelectric switch for raising (or lowering) the reaping section in the switch box 44 is turned on, and a solenoid valve interposed in the hydraulic circuit of the hydraulic cylinder that raises and lowers the reaping section is activated. The reaping section K is raised (or lowered) by switching.

The operation of the inventive machine configured as described above is as follows. Normal automatic cutting height adjustment detects the height of the cutting part from the ground by sliding the middle parts 14b, 14b of the sensor arm 14.14 on the ground surface. When becomes more than (or less than) a predetermined value, sensor arm 1
4.14Fi ground (or coil spring 43.
43), and the rear ends of the sensor arms 14, 14 move upward (or downward). This causes the upper front of the first link element 6F'i (
The second link element 7 rotates upward (or downward), and the rotation shaft 8 fixed to the front of the second link element 7 rotates from the right side of the fuselage. The push-pull wire 30 is rotated clockwise (or counterclockwise), and the rear end of the connecting piece 28 fixed to the left end thereof is rotated upward (or downward) to remove the push-pull wire 30.
Press (or pull) 0a upward (or downward). By pressing (or pulling) this inner wire 30a, the sliding block 41Fi of the electric signal converter Y provided in the auxiliary column 39 is pushed backward (or by the urging force) against the urging force of the coil spring 43, 43. or forward),
The operating rod 45 is rotated backward (or forward) to turn on the photoelectric switch for raising (or lowering) the reaping section in the switch box 44. This causes the cutting section to rise (or fall). As the sensor arm 14.14 rises (or descends) to the reaping area, the sensor arm 14.14 moves downward (or upward) due to the biasing force of the coil spring 43.43 (or the pressing force from the ground surface).
The sliding block 41 moves forward (or backward), and when the height of the cutting section above the ground falls within the appropriate cutting height range, both the photoelectric switch and the inner switch in the switch box 44 are turned off. Movement to the reaping section is stopped.

When raising (or lowering) the cutting height depending on the growth condition of the culm, etc., rotate the adjustment lever 38 forward (or backward) to move the rear end of the connecting piece 37 upward (or downward). rotate it,
The connecting rod 36 is moved upward and forward (or backward and downward), the connecting link 35 is rotated backward (or forward), and the connecting block 34 is moved backward (or forward). As a result, the sleeve 30b of the push-pull wire 30 attached to the connection block 34 is pulled (or pushed) backward (or forward).
As mentioned above, the end of the inner wire 30a on the sensor arm 14 side advances (or retracts) from the lower end of the sleeve 30b.
The rear end of the sensor arm 14.14 will then move downwards (or upwards). In this case, the amount of movement of the inner wire 30a is the amount of movement of the connecting block 34, and the position of the sliding block 41 does not move.
The relative position between the operating rod 45 and the sliding block 41 does not change. Therefore, the dead zone position in which the photoelectric switch in the switch box 44 does not operate is determined by moving the rear end of the sensor arm 14° 14 downward (or upward) with respect to the mounting rod 5. ), the dead zone position will move away from (or approach) the mounting rod 5, and the required high yield (or low mowing) will be performed.

Also, when the adjustment lever 38 is turned significantly backward, the connecting rod 3
6 moves rearward and downward, the connecting block 34 moves forward greatly, the sleeve 30b is pressed, and the inner wire 3
The sensor arm 14 side end of Oa is retracted into the sleeve 30b, and the sensor arm 14.14 is in the upper retracted position. At this time, the limit switch 40 is turned on by the rearward and downward movement of the connecting rod 36, and automatic adjustment of the cutting height is prohibited.

FIG. 7 is a schematic side view of the sensor arm 14 and its surroundings for explaining the rotational movement of the sensor arm 14. The state is shown by the two-dot chain line. FIG. 8 is an explanatory diagram of the rotational movement of the sensor arm 14. The rotation of the sensor arm 14 during high cutting and low cutting will be explained based on both figures. The center of the front end pivot of the sensor arm 140 is set to A1, and the center of rotation of the rotation shaft 8 rotatably attached to the reaping part K is set to B1.
If the pivot center of the second link element 7 is C, and the other pivot center of the first link element 6 is D, then
Points A and B are fixed and the sensor arm 14 and the first . A link mechanism is constituted by the second link element 6.7-. and second link element 71
'I rotates around point B, and the sensor arm 14 and therefore the point at the rear end of the sensor arm 14 rotates around point A, but AD is sufficiently long compared to the length of BC. In addition, the second link element 7 is in a nearly horizontal state when mowing is high, whereas the first link element 6 is in a nearly vertical state when mowing is low. (Therefore, the amount of rotation of the rear end of the sensor arm 14, that is, the amount of rotation of point D about point A, relative to the amount of rotation α of the six points about point B, that is, the amount of rotation of point D about point A, is β. However, the rotation amount α of the 6 points during low mowing
The amount of rotation of point D relative to the angle is γ, which is smaller than β. Therefore, the amount of movement of the sliding block 41 within the dead zone in which the double-light switch in the sensor box 44 does not operate, in other words, the amount of vertical movement of the sensor arm 14 with respect to a constant amount of rotation of the rotation shaft 8, that is, the width of the dead zone. Sensor arm 1
The rotation amount of No. 4 becomes large h as shown by the solid line in Fig. 7 when the cutting rate is high, whereas when the cutting rate is low
As shown by the two-dot chain line in the figure, it is small l.

This is because the cutting blade 3. Divider LA',
Since the lr etc. are located close to the field surface, if the width of the dead zone is the same as that at high yield, the automatic cutting height adjustment will not be able to follow the upward change in the field surface, and the mowing blade 3 etc. will sink into the soil. There is a high risk of damage to the cutting blade 3, etc., while the cutting blade etc. are located far away from the field surface during high interest rates, so even if the dead zone width is large, the cutting blade may not penetrate into the soil. Since there is no risk of cutting into the ground, the dead zone width is reduced during low mowing to improve the accuracy of automatic cutting height adjustment, giving priority to followability and preventing the cutting blade from entering the soil. On the other hand, when the yield is high, the dead zone width is increased to avoid hunting and give priority to the stability of automatic cutting height adjustment.

As described in detail above, the Kihatsu F3A is a harvester equipped with an automatic cutting height adjustment device that detects the height of the cutting section above the ground and raises and lowers the cutting section based on the detection result. The width of the dead zone when set to low cutting rate is smaller than the width of the dead zone when set to high rate of cutting, so that the height of cutting can be adjusted automatically when the cutting rate is set to high rate.
Adjustment can be performed stably, and when mowing at a low level, the blade improves the accuracy of automatic cutting height adjustment, which improves followability and prevents the cutting blade from entering the soil, preventing damage to the cutting blade, etc. The present invention has excellent effects such as being able to prevent Q from occurring.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is an external view of the inventive machine, Fig. 2 is a right side view of the detection section of the cutting height sensor, and Fig. 3 is a perspective view from the rear right side. Figure 4 is a perspective view from the rear right side of the electric signal converter of the cutting height sensor, Figure 5 is its right side view, Figure 6 is a schematic plan view of the area around the driver's seat, and Figure 7 is the operation. A schematic side view of the vicinity of the sensor arm for explanation, and FIG. 8 is an explanatory diagram of the operation of the sensor arm. K...Reaping section X...Detection section Y...Electric signal conversion section Il lr...Divider 2...Lifting device
5...Mounting rod 6,7...Link element 8.
...Rotation axis 9...Support rod 14...Sensor arm
15... Bracket 28... Connection piece 30...
Push-pull wire 30a...inner wire 30
b...Sleeve 33...Sliding rod 34...Connection block 38...Adjustment lever 41...Sliding block 42.43...Coil spring 44...Switch box 45...Operation Rod patent applicant
Yanmar Agricultural Machinery Co., Ltd. Agent Patent Attorney Kono
Noboru

Claims (1)

[Claims] 1. In a harvester equipped with an automatic cutting height adjustment device that detects the height of the cutting section above the ground and raises or lowers the cutting section based on the detection result, it is possible to set the cutting height to a predetermined height and set it to low cutting. A harvesting machine characterized in that the width of the dead zone when the harvester is set to high yield is smaller than the width of the dead zone when the harvester is set to high yield.