JPH0433716Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a combine harvester that can control the pre-harvesting section and the threshing device substantially horizontally.

[Conventional technology]

In a combine harvester that threshes rice, etc. that has been planted in a field while reaping it, a so-called rolling phenomenon occurs in which the machine tilts to the left or right due to the undulations of the field in the left-right direction of the machine and the running in soft wet fields.

Regardless of this phenomenon, the stalk culm reaping by the reaping pre-processing unit installed at the front of the traveling machine is at an appropriate height relative to the field and is constant in the left and right direction of the traveling machine, In order to prevent variations in the cutting height of stem culms and to prevent the cutting blade at the lower part of the cutting pre-treatment section from penetrating into the soil, the prior art Utility Model Application Publication No. 58-192511 was used. As disclosed in the publication, the reaping pre-processing section is connected to the traveling machine via the arm so that it can roll freely, and the left and right inclination of the reaping pre-processing section is sensed and the height above the ground is detected, and based on the results. It is proposed to rotate the arm using a hydraulic cylinder to control the rolling of only the reaping pre-processing section to the left and right.

[Problem that the invention attempts to solve]

In this way, when only the pre-harvesting processing section is rolled in the left-right direction, the workability of reaping grain culms by the pre-harvesting processing section is improved, but the threshing device mounted on the traveling machine body rolls as the traveling machine body moves from side to side as the field slopes. As the threshing device also tilts from side to side, the oscillating sorting mechanism in the threshing device also slants from side to side, causing grains and other objects to be processed that leak onto the oscillating sorting mechanism to be biased toward the lower side, resulting in poor sorting performance. to degrade.

In order to avoid this inconvenience, the machine frame above the traveling frame equipped with the traveling crawler is configured to be able to roll freely, and the threshing device and the reaping pre-processing section are mounted on this machine frame. It would be fine if it were configured to roll integrally with the reaping pre-processing section, but in the power transmission mechanism that transmits power from the engine mounted on the aircraft frame to the traveling transmission case of the traveling frame, the output of the engine is The distance and parallelism between the shaft and the input shaft of the traveling transmission case vary due to the rolling, creating a new problem in that smooth power transmission cannot be ensured.

The object of the present invention is to solve problems in a power transmission mechanism when a traveling frame on which the traveling crawler is mounted is connected to a body frame thereon in a rolling manner.

[Means for solving problems]

Therefore, in the present invention, the machine frame is connected to the traveling frame equipped with the traveling transmission case that transmits power to the traveling crawler via a rotation fulcrum so that it can roll left and right, and the engine and threshing device are connected to the machine frame. A processing section is provided to control the fuselage frame to be held substantially horizontally on the left and right according to the left and right rolling of the traveling crawler, and a winding is provided between the output pulley of the engine and the input pulley to the traveling transmission case. The input pulley is arranged above the rotation fulcrum in the vicinity thereof when viewed from the front of the running frame, and the output pulley is arranged above the rotation fulcrum. And the input pulley and the output pulley,
Their vertical distances are close to each other, and they are disposed approximately on the same straight line as the vertical axis passing through the pivot point.

[Functions and effects of the invention]

In this invention, regardless of rolling, which is the horizontal inclination of the traveling frame, the machine frame is controlled so that it is approximately horizontal on the left and right, so both the pre-reaping processing section and the threshing device installed on the machine frame are horizontal on the left and right. Therefore, the transfer of grain culms from the pre-harvesting processing section to the threshing device can be carried out smoothly, and the sorting performance of the threshing device is not impaired.

When the traveling frame is tilted left and right with respect to the horizontal body frame, the output pulley of the engine attached to the body frame side and the input pulley to the traveling transmission case attached to the traveling frame side Since the positional relationship between the two pulleys will also change, there is a risk that a force in the direction of lateral shear will act on the belt wound around both pulleys, causing the belt to come off.

In this case, in the present invention, both pulleys are provided so that the rolling pivot of the aircraft frame relative to the traveling frame is substantially aligned with the vertical axis passing through the pivot when viewed from the front of the aircraft. In this case, the input pulley is disposed above the rotation fulcrum in close proximity thereto, and the output pulley is disposed above it, and the distance between the input pulley and the output pulley in the vertical direction is When the output pulleys are moved closer to each other, the amount of horizontal movement of the output pulley relative to the input pulley, which is fixed in position, is also reduced, which has the effect of eliminating accidents in which the wrapped belt comes off the pulley.

〔Example〕

Next, an embodiment of the present invention will be described. Reference numeral 1 designates a running frame of a combine harvester equipped with a pair of left and right running crawlers 2, 2 and a running transmission case 3 for transmitting power to the running crawlers 2, On the traveling frame 1, there is a rotation fulcrum 0, which will be described later.
The body frame 4 is connected to the body frame 4 so as to be vertically movable in the left and right direction, that is, to be freely rolling, and the body frame 4 is equipped with an engine 5, a threshing device 6, and a reaping pre-processing section 7 at the front thereof.

The handling cylinder 8 in the handling chamber of the threshing device 6 is arranged so that its axis line runs along the direction of movement of the combine harvester. Reference numeral 9 denotes a feed chain installed along the threshing device 6, and the feed chain 9 is connected to the machine frame 4.
The feed chain 4 is disposed along the left side in the traveling direction, and the front end of the feed chain 4 is disposed so as to face the terminal end of the stock head conveying device 10 in the reaping pretreatment section 7.

The reaping pre-processing section 7 is provided via a machine frame 11 that protrudes from the front part of the machine body frame 4, and is connected to the machine frame 11.
At the lower end of the lower frame 12, a plurality of grass cutting bodies 13 and then a reaping device 14 are provided, and a plurality of grain culm lifting devices 15 are provided at the front part, as well as a raking wheel, an ear tip conveying device 16, and a stock cutting device 14. Original transport device 1
0.

A pair of front and rear support frames 17, 17 formed in a downward U-shape when viewed from the front in the traveling frame 1 is provided with a front and rear longitudinal pivot shaft 18, which projects downward from the body frame 4. Bracket 1
9 and 19, thereby forming the rotation fulcrum 0 that supports the body frame 4 with respect to the traveling frame 1 in a rolling manner.

Between the traveling frame 1 and the fuselage frame 4,
A pair of front and rear hydraulic cylinders 20, 20 are installed and driven to expand and contract via a hydraulic circuit (not shown) associated with a left/right tilt angle detection sensor (not shown) mounted on the fuselage frame 4. The body frame 4 is controlled so as to be always held horizontally regardless of the horizontal inclination of the frame 1.

That is, in a front view from the front of the machine (FIG. 2), if the traveling frame 1 is tilted downward to the right by an angle θ1 with respect to the horizontal reference plane H due to the situation of the field, both hydraulic cylinders 20 is protruded, and the right side of the fuselage frame 4 is rotated in the upward right direction by an angle θ1 about the rotation fulcrum 0. Conversely, the traveling frame 1 is rotated in the downward left direction with respect to the horizontal reference plane H. When tilted by angle θ2,
In response to this, both hydraulic cylinders 20 are shortened, and the body frame 4 is rotated by an angle θ2 on its right side in the rightward downward direction about the rotational fulcrum 0.

An operating column 22 is provided on the front right side of the fuselage frame 4 in the forward direction, and the operating column 22 is equipped with operating levers 23, 23 for switching the side clutches, a main gear shift lever 24, a pedal 25 for the main clutch, etc. Main clutch 27 linked to this pedal 25
is related to the power transmission mechanism 26 from the engine 5 to the traveling transmission case 3.

As shown in FIGS. 3, 4, and 5, this power transmission mechanism 26 is connected to an output shaft 28 of the engine 5.
It consists of an output pulley 29 attached to the running frame, and a belt 32 such as a V-belt wrapped around the input pulley 31 attached to the input shaft 30 of the traveling transmission case 3. 1, the input pulley 31 is located above the rotation fulcrum 0 at a distance h1 close to the rotation fulcrum 0, and the output pulley 29 is located above the rotation fulcrum 0 at a short distance h2. In addition, the input pulley 31 and the output pulley 29 are arranged approximately on the same straight line as the vertical axis passing through the rotation fulcrum 0, or there are only minute dimensions on the left and right sides of this straight line. It is arranged to be biased.

Therefore, since the distance between both pulleys 29 and 31 in the vertical direction with respect to the rotational fulcrum 0 is not large, the output shaft 28 is not large when viewed from the side of the combine.
The engine 5 and the traveling transmission case 3 are arranged so that there is a distance between the engine 5 and the input shaft 30 in the longitudinal direction.

In this way, when the input pulley 31 is placed close to the rotational fulcrum 0, the body frame 4 rotates around the rotational fulcrum 0 due to the rolling control, and the output pulley 29 moves in either the left or right direction. At this time, since the positional relationship between the rotational fulcrum 0 and the input pulley 31 remains unchanged, the belt 32 wound between both pulleys 29 and 31 moves left and right around the side of the input pulley 31 near the rotational fulcrum 0. It will rotate.
However, if the vertical distances h2 and h1 of both pulleys 29 and 31 with respect to the pivot point 0 are shortened,
The horizontal movement distance of the output pulley 29 with respect to the input pulley 31 is also small, and as a result, the belt 32
Since the deviation in the width direction of the belt 32 becomes minute, power transmission during rolling control can be carried out smoothly without any hindrance, and an accident such as the belt 32 coming off from the pulley does not occur.

An embodiment in which one of the two pulleys 29, 31 is disposed so as to be offset by a minute distance to the left and right with respect to the vertical axis S of the rotational fulcrum 0 is shown in FIGS. 5 and 6.

In this example, since the rotation fulcrum 0 is located at a position to the left in the direction of movement of the machine, even if the traveling frame is tilted at the same angle in the left-right direction, the height above the ground at the right end of the machine relative to the field will change. Running frame 1
When the aircraft frame 4 is tilted downward to the left, unless the rotation angle θ2 of the aircraft frame 4 in the downward right direction is increased, the aircraft frame 4
is not approximately horizontal. Therefore, the rotation angle θ1 of the aircraft frame 4 in the upward right direction with respect to the rotation fulcrum 0 is
This is a case where the rotation angle θ2 in the downward right direction is smaller.
When viewed from the front, the center position B0 of the input pulley 31 in the belt width direction is made to substantially coincide with the vertical axis S, and the horizontal distance, that is, the deviation, between the center position B0 and the center position A0 of the output pulley 29 in the belt width direction is α. (α)={θ2×h2−θ1×h2}/2
shall be.

That is, if the maximum rotation angles θ2 and θ1 are the same, when both the traveling frame | frame 1 and the fuselage frame 4 are in a parallel state, both center positions A0 and B0 will be aligned with the vertical axis arrangement | Since the horizontal movement distance of the center position A0 in the belt width direction of the output pulley 29 with respect to the rotation fulcrum 0 is equal, the horizontal movement distance of the output pulley 29 with respect to the input pulley 31 is also equal, and the maximum horizontal movement is The lateral displacement relationship of the belt 32 with respect to both pulleys 29 and 31 during rotation is the same on both the left and right sides.

However, if θ1<θ2, as shown in FIG. 6, the distance the output pulley 29 moves to the left when rotating around the pivot point 0 is the distance from point A0 to point A1, which is approximately θ1× On the other hand, the moving distance of the output pulley 29 to the right is the distance from point A0 to point A2, which is approximately equal to θ2×h2, and the moving distance to the left is smaller than the moving distance to the right.

In other words, the movement distance θ2×h2 of the output pulley 29 to the right when the traveling frame 1 is at its maximum inclination downward to the left is the movement distance θ2×h2 of the output pulley 29 to the left when the traveling frame 1 is at its maximum inclination downward to the right. The distance is much larger than the distance θ1×h2, and the lateral deviation relationship of the output pulley 29 with respect to the input pulley 31 also differs greatly between the left and right sides, and the lateral deviation relationship of the belt 32 wound between the input pulley 31 and the output pulley 29 also differs between the left and right sides. When the belt 32 is rotated to the side where the lateral deviation is large, an accident may occur in which the belt 32 comes off the pulley.

Therefore, in order to eliminate this phenomenon, as in this embodiment, the lateral displacement dimension of the output pulley 29 with respect to the input pulley 31 when the traveling frame 1 and the fuselage frame 4 are in a parallel state is determined in advance by the lateral movement distance of the output pulley 29. On the side with less, (α) = {θ2×h2−θ1×
By setting h2}/2, even when the machine frame 4 is tilted to the left or right to the maximum, the left and right lateral movement distance of the output pulley 29 relative to the input pulley 31 is made equal, thereby preventing lateral deviation of the belt 32. By making the relationship equal on both the left and right sides, accidents of the belt 32 coming off can be reduced or prevented.

As shown in FIGS. 3 and 5, in the power transmission mechanism 26 by transmitting the belt 32 from the output pulley 29 of the engine 5 to the input pulley 31 of the traveling transmission case 3, when the tension of the belt 32 is increased, the power is A main clutch 27 consisting of a tension pulley 34 that transmits the transmission and cuts off the transmission when released is a pedal 25 arranged on the steering column 22.
linked to. At this time, as shown in Figure 5,
The input shaft 30 to the traveling mission case 3 is provided with a shaft rotation regulating device 35 such as an expandable brake, and the shaft rotation regulating device 35 is linked to ON/OFF of the power transmission mechanism 26 by the main clutch 27. When the power to the power transmission mechanism 26 is cut off, the rotation of the input shaft 30 is forcibly stopped, and the lateral displacement of the output pulley 29 with respect to the input pulley 31 causes incomplete power transmission due to the accompanying rotation of the belt 32 wrapped around both pulleys. It eliminates sexuality.

That is, when the pedal 25 is depressed and the tension on the belt 32 is eliminated, the pedal 25 is depressed.
Interlocking rod 36 and lever 39 that are linked to the movement of 5.
The pair of brake shoes 37 in the shaft rotation regulating device 35 are expanded so as to press against the inner surface of the brake drum 38 that rotates integrally with the input shaft 30, thereby preventing the rotation of the input shaft 30 when power transmission is interrupted. is forcibly stopped.

As a result, when the aircraft frame rolls with respect to the traveling frame as described above,
Even if the output pulley 29 is deviated laterally with respect to the input pulley 31, that is, there is a possibility that the belt wound around it will rotate, the shaft rotation regulating device 35 simultaneously disengages the main clutch and controls the traveling mission case 3. This eliminates the rotation at the wheel, and there is no problem with driving, shifting, etc.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the combine harvester, FIG. 2 is a front view of the combine harvester,
Figure 3 is a side view of the main part including the rolling pivot of the traveling frame and the fuselage frame, Figure 4 is a front view of the main part, and Figure 5 is a partially cutaway front view of the main part of Figure 4. FIG. 6 is an explanatory diagram of the action. 1... Traveling frame, 2... Traveling crawler, 3
... Traveling transmission case, 4 ... Machine frame, 0 ... Rotating fulcrum, 5 ... Engine, 6 ... Threshing device, 7 ... Pre-reaping processing section, 9 ... Feed chain, 10 ... Stock transfer Device, 11...Machine frame, 1
3... Grass splitting body, 14... Reaping device, 15... Grain culm pulling device, 16... Ear tip conveying device, 17... Support frame, 18... Pivot shaft, 19... Bracket, 20
... Hydraulic cylinder, 22 ... Operation column, 25 ...
...Pedal, 26...Power transmission mechanism, 27...Main clutch, 28...Output shaft, 29...Output pulley,
30...Input shaft, 31...Input pulley, 32...
Belt, 34... tension pulley, 35... rotation regulating means.

Claims (1)

[Scope of utility model registration request] The aircraft frame is connected via a pivot point to the traveling frame, which is equipped with a traveling transmission case that transmits power to the traveling crawler, so that it can roll left and right.
An engine, a threshing device, and a reaping pre-processing section are arranged on the machine frame, and the machine frame is controlled to be held substantially horizontally on the left and right according to the left and right rolling of the traveling crawler, while the output pulley of the engine and the The input pulley is configured to transmit power via a belt wrapped around an input pulley to the traveling transmission case, and the input pulley is disposed above and close to the rotation fulcrum when viewed from the front of the traveling frame. A combine harvester, in which an output pulley is provided above the input pulley, the input pulley and the output pulley are close to each other in the vertical direction, and are arranged substantially on the same straight line as a vertical axis passing through a rotation fulcrum.