JPH03112412A - Combine - Google Patents

Abstract

PURPOSE:To prevent the damage of a reap-pretreatment part caused by the thrusting of the part into a field in the case of riding the pretreatment part over a ridge by providing a suspension mechanism which elastically supports the reap-pretreatment part when the part is lowered by its own weight. CONSTITUTION:A coil spring 60 is put on a hydraulic cylinder 59 to elongate the cylinder 59 with the spring. In the case of normal reaping operation, the reap-pretreatment part A is lowered by its own weight and crops are reaped at a prescribed height by the aid of the pretreatment part guided along the ground using a supporting member 66 contacting with ground. When a crawler driving apparatus 1 is inclined forward relative to the machine body to correct the rise of the front part caused by the drive in a paddy field, the reap- pretreatment part A can be quickly retreated upward even in the case of riding over a ridge to prevent the damage of the pretreatment part.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is directed to connecting a reaping pretreatment section to the front part of a traveling machine equipped with a crawler traveling device so that it can be driven up and down by a hydraulic drive mechanism. The present invention relates to a combine harvester equipped with a tilting drive mechanism for tilting a crawler traveling device back and forth relative to the machine body.

[Conventional technology]

Conventionally, the combine harvester described above has been configured to raise and lower the pre-reaping section by controlling the hydraulic drive mechanism based on the detection result of a sensor that detects the height of the pre-reaping section above the ground (for example, (See Japanese Patent Application Laid-Open No. 63-296604). Further, the crawler traveling device generally has a driving wheel body located at the front side, and tilting and vertical movement with respect to the body is performed at the rear side.

[Problem to be solved by the invention]

The fore-and-aft tilting drive of the roller traveling device as described above is for correcting the problem that the front side of the machine body lifts up and tilts as the machine moves in a soft field, for example, by using the tilting drive to correct the problem that the machine body is in a substantially horizontal position. be.

However, as mentioned above, if the machine goes over a protrusion while traveling with the rear of the machine relatively lifted, the hydraulic pressure raising drive of the pre-reaping processing section cannot follow up quickly and tends to lag. Because of this, there was a drawback that there was a high risk that the tip would stick into the field.

The present invention aims to solve the above-mentioned problems.

[Means to solve the problem]

A feature of the present invention is that the combine harvester described at the beginning is provided with a suspension mechanism that elastically supports the pre-harvesting section in a state of yielding under its own weight.

[For production]

Since the reaping pretreatment section is elastically supported in a yielding state under its own weight, it lands on the field and moves up and down along the field as the machine advances. When the machine is traveling in a relatively rearward lifting position due to the tilting drive mechanism, even if the machine goes over a protrusion, the reaping pre-processing section will move upwards relative to the machine after touching the ground. You can evacuate to

〔Effect of the invention〕

Therefore, according to the present invention, although the front and back posture of the machine can be corrected and adjusted to a substantially horizontal posture according to the field conditions, the pre-reaping processing section may fall into the field when climbing over a protrusion, causing damage. This makes it possible to avoid the risk of this happening.

〔Example〕

FIG. 1 shows the front part of a combine harvester according to the invention.

This combine is equipped with a threshing device (2) on a traveling body equipped with a pair of left and right crawler traveling devices (1), and
The reaping pre-processing section (A) is connected to the front of the machine so that it can swing vertically around the horizontal axis (Pl), and the control section (3) is installed on the side of the front of the machine.
Deploy and configure.

The reaping pre-processing section (A) consists of a reaping section (4) that raises and reaps the planted grain culms, and a vertical conveyance section (5) that conveys the harvested grain culms to the rear threshing device (2). , the reaping section (4)
is equipped with a plurality of weed cutting tools (6) at the front end, a pulling device (7) for raising the fallen culm into an upright position at the rear thereof, and a clipper for cutting the base side of the raised culm. It is comprised of a type reaping device (9), a conveyor belt with protrusions (37) that gathers the harvested grain culms in the center, a scraping packer (38), and the like. On the other hand, the vertical conveyance section (5) is connected to the reaping section (4).
The structure is such that the reaped husk culm, which is in an upright position, is conveyed while gradually changing its position to a sideways position, and is fed to the starting end of the feed chain (39) of the vertical conveyance section (5). It consists of a locking and conveying device (5a) that locks and conveys the stock side, and a holding and conveying device (5b) that grips and conveys the stock side.

The reaping section (4) is configured to be able to move laterally to the left and right between a circular mowing state in which it largely protrudes to the left with respect to the machine body, and a front mowing state in which it is located substantially in front of the machine body. In detail,
As shown in FIGS. 6 and 7, a vertical frame (10) is erected at the front end of the traveling machine, and this vertical frame (
10) A horizontal transmission case (11) is rotatably supported on the upper end of the transmission case (11) around its horizontal axis. A pipe frame (12) facing forward and backward is fixed to the outer peripheral surface of the horizontal transmission case (11), and a pipe frame (12) is fixed to the outer peripheral surface of the horizontal transmission case (11).
The transmission shaft (13) of 1) and the transmission shaft (14) of the pipe frame (12) are connected by a bevel gear mechanism (15), and the end input pulley (8) of the transmission shaft (13) of the horizontal transmission case (11) is connected to the transmission shaft (14) of the pipe frame (12). ) is configured to receive power from an engine (not shown) and transmit it to a transmission shaft (14) within the pipe frame.

A support case (1) is provided at the tip of the pipe frame (12).
6) is provided, and the reaping part (4) is attached to this support case (16).

The mounting structure of the reaping part (4) in this tip support case (16) will be explained. At the pipe frame (12) attachment site of the tip support case (16), a sliding shaft (18) aligned along the width direction of the fuselage is supported by a bearing so as to be slidable in the direction of its own axis (X). , a passive bevel gear (19) is fixed to the middle part formed in a hexagonal shape, and a driving bevel gear (20) is fixed to the tip of the pipe frame transmission shaft, and the sliding shaft (
18) is formed. This passive bevel gear (19) is fitted onto the hexagonal middle part of the sliding shaft (18) and configured to be able to rotate integrally with the sliding shaft (18).
1), it is rotatably supported by the tip support case (16), and is configured to allow horizontal sliding of the sliding shaft (18). The tip support case (16) of this sliding shaft (18)
) are provided with bevel gear transmission mechanisms (22) and '(22) that supply power to the lifting devices (7) and (7), respectively.

On the front side of the sliding shaft (18), a pipe-type first sliding frame (23) is pivotally supported via bushes (24), (24) to the tip support case (16) so as to be able to slide laterally. At the same time, left and right support frames (25) have left and right weeding tool support rods fixed to the left and right ends protruding from the tip support case (16).
), (25) are connected and fixed.

Moreover, further forward of the first sliding frame (23), a second sliding frame (26) is provided with a left and right support frame (25).
, (25), and is inserted from the front opening side into the holder (27), which has a substantially U-shaped cross section and extends further forward from the front end of the support case (■6), and is supported by a loose fit. , is configured to be able to slide laterally relative to the holder (27).

Next, the lateral sliding drive device for the reaping section (4) will be explained. A screw shaft (28) with a large advance angle is inserted laterally into the tip support case (16), and a female screw member (29) engages with the screw shaft (28) on the left side surface of the tip support case (16). This is provided.

The left end of the screw shaft (28) is connected to the left support frame (25).
), and a driven bevel gear (30) is attached to the tip protruding from the left support frame (25). On the other hand, the downward output shaft of the drive motor (32) above the driven bevel gear (30) and above the left side protruded conveyor belt (37) and the screw shaft (28) are connected to the downward transmission shaft (33). It is a transmission connection via. In the figure (3
4) is a driving bevel gear that is attached to the lower end of the transmission shaft (33) and meshes with the driven bevel gear (30).

On the other hand, the first bevel gear case (3) is connected to the bevel gear transmission mechanism (22) provided at both ends of the sliding shaft (18).
5) and this first bevel gear case (35
) as a support stand and set up the transmission case (36),
A second bevel gear case (40) is provided in the middle of this lifting transmission case (36).
The power is branched from the protrusion conveyor belt (37).
) and a branch structure that supplies power to the packer (38). And this second bevel gear case (40
), and attach the drive motor (
32) is the installation.

The pair of left and right crawler traveling devices (1), (1) each have a ground contacting part that can be moved up and down relative to the aircraft body while maintaining a substantially horizontal attitude, and can be tilted back and forth relative to the aircraft body. It is composed.

More specifically, as shown in FIGS. 3 to 5, the crawler traveling device (1) has a drive wheel body (41) at the front end, a tension wheel body (42) at the rear end, and A plurality of groups of ground contact wheels (43) are arranged in parallel in the front and back between each of the wheels (41) and (42), and a crawler belt (
44) is wound.

The drive wheel body (41) is supported by a fixed frame (46) integrally extended from the fuselage frame (45), and the tension wheel body (4
2) and each ground contact wheel (43) to the track frame (47
). The track frame (47) is pivotally connected to the intermediate support frame (49) via a pair of front and rear swing links (48a) and (48b), and a penetrating pivot shaft (50a) on the intermediate support frame (49) side; Drive arms (51a), (
A pair of drive arms (51b) are rotatably extended, and both drive arms (51b) are rotatably extended.
1a).

(51b) are pivotally connected by a rod (52), and the rear drive arm (51b) and the fuselage frame (45) are pivotally connected by a hydraulic cylinder (53). On the other hand, the pair of left and right intermediate support frames (49) are supported by the fixed frame (46) so that the rear side can swing up and down around the axis of the front side penetrating pivot shaft (50a). A single hydraulic cylinder (5
4), it is supported on the body frame (45) so that it can be vertically oscillated and fixed in one direction.

In other words, when the hydraulic cylinder (53) is driven to expand and contract with the intermediate support frame (49) fixed, the track frame (47), that is, the crawler grounding part, moves relative to the aircraft while maintaining a substantially horizontal attitude. It is configured to move up and down.

Next, the support structure of the intermediate support frame (49) will be explained. The same horizontal axis (
A push/pull rod (56) is connected between a pair of left and right swing drive arms (55), (55) which are pivoted around P2) so as to be able to swing back and forth, and each of the left and right intermediate support frames (49), (49).
, (56). Then, the mid-swing portions of each swing drive arm (55), (55) are connected and fixed by a pipe frame (57), and a hydraulic cylinder is connected to the left and right intermediate portions of the pipe frame (57) via a bracket (58). (54) is pivotally connected.

In this way, by driving the hydraulic cylinder (54) to expand and contract, the left and right swing drive arms (55) are moved.

(55) swings back and forth around the axis (P2), and the left and right intermediate support frames (49), (49) are connected to the front side penetrating pivot via the push/pull rods (56), (56). (50a
), the aircraft swings vertically around its axis, resulting in the aircraft's attitude toward the ground tilting back and forth.

The reaping pre-treatment section (A) is configured to be able to swing up and down by a hydraulic cylinder (59) as a hydraulic drive mechanism, and this hydraulic cylinder (59) is a single-acting type, and is configured to be able to freely swing up and down. The pre-reaping treatment section (A) is swung upward by a large amount, and in the descending state, the oil is drained by the weight of the pre-reaping treatment section (A).

It's Nishide. Then, the reaping pre-treatment section (A
) is provided with a coil spring (60) which is an example of a suspension mechanism that elastically supports the.

Specifically, as shown in FIG. 2, the member (61) is fixed to the rear side of the pipe frame (12) with a U-shaped cross section over substantially the entire length in the axial direction. (
The tip of the hydraulic cylinder (59) is pivotally connected to a pin (62) penetrating both sides of the hydraulic cylinder (59), and the base end of the hydraulic cylinder (59) is connected to the fuselage frame (45).
) via a bracket (63). Then, the coil spring (
60) is fitted onto the outside to bias the hydraulic cylinder (59) into an extended state. Further, a ground support (66) is attached to the reaping frame (64) in the reaping section (4) via a spring (65) so as to be relatively movable up and down and biased downward. During normal reaping work, the reaping pre-processing section (
A) is set to yield under its own weight, and the ground support (66
) allows mowing at a constant height while guiding the crawler to the ground.Moreover, in order to correct the front lift and inclination that occurs when traveling in wet fields, the attitude of the crawler traveling device (1) relative to the aircraft can be set relatively forward. When driving in the downhill mode, even if you go over a protrusion, the pre-reaping treatment section (
A) can be quickly evacuated upwards and damage can be prevented.

In addition, when turning the headland or crossing ridges, use the pre-harvesting treatment section (A).
can be made thicker (raised) to prevent collisions with ridges.

[Another example]

As shown in FIG. 8, the coil spring (60) is stretched between the pipe frame (12) and the fuselage frame (45) by passing under the crawler drive shaft (67). You can.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the combine harvester according to the present invention, FIG. 1 is a side view of the front part, FIG. 2 is a plan view of the main part, FIGS. 3 and 4 are side views of the crawler traveling device, and FIG. The figure is a simplified perspective view showing the front-back tilting structure, Figure 6 is a sectional view showing the reaping part slide structure, Figure 7 is a longitudinal side view of the slide support part, and Figure 8 is a front side view of another embodiment. It is. (1)... Crawler traveling device, (54)... Group tilting drive mechanism, (59)... Drive mechanism, (6
o)...Suspension mechanism, (A)...
...Reaping pre-processing section.

Claims (1)

[Claims] At the front of the traveling aircraft equipped with the crawler traveling device (1),
A hydraulic drive mechanism (59) connects the reaping pre-processing section (A) so that it can be driven up and down, and also includes a tilting drive mechanism (54) that adjusts the longitudinal tilting of the crawler traveling device (1) relative to the machine body. A certain combine harvester, which is equipped with a suspension mechanism (60) that elastically supports the pre-reaping treatment section (A) in a state where its own weight is lowered.