JPH0693810B2 - Combine harvesting pretreatment device - Google Patents

Description

TECHNICAL FIELD The present invention relates to the structure of a pre-mowing processing unit device in a combine.

[Conventional technology]

In combine harvesters that thresh rice while harvesting rice that has been planted in a field, there is a so-called pitching phenomenon in which the vehicle itself tilts back and forth due to undulations in the field before and after the traveling direction of the vehicle, or in a field in the horizontal direction of the vehicle. A so-called rolling phenomenon in which the traveling body tilts to the left or right occurs due to the undulation of the surface or the running in the soft wet field.

Despite this phenomenon, the stalk culm of the mowing pretreatment section arranged in the front part of the traveling machine body is at an appropriate height position with respect to the field scene and becomes constant in the left and right direction of the traveling machine body. It is necessary to prevent variations in the cutting height of the culm and to prevent the cutting blade in the lower part of the pre-cutting processing section from going into the soil.

In order to solve this problem, the applicant of the present invention has previously disclosed Japanese Patent Laid-Open No. 59-20.
In Japanese Patent No. 5909, it was proposed that the rolling rotation fulcrum of the pre-mowing treatment unit be located near the starting end of the feed chain. That is, the pipe-shaped transmission frame to which the pre-mowing treatment section is attached is projected rearward to the front portion of the traveling machine body, and the base end portion of the pipe-shaped transmission frame is a straight line extending in the center direction along the left-right direction of the traveling machine body. -Shaped horizontal pipe is rotatably mounted in the middle of the horizontal pipe, and the horizontal pipe and the pipe-shaped transmission frame are connected by a hydraulic cylinder. The base end is rotatably attached to the front end of the input pipe that projects forward in the traveling direction of the traveling machine body and is parallel to the feed chain, and the input shaft is inserted inside, and the horizontal pipe and the traveling machine body are hydraulic cylinders. By connecting them, the pre-mowing processing unit is configured to be able to roll in the lateral direction of the traveling machine body.

And, the transmission shaft protruding from the pitch-rotatably rotatable pipe-shaped transmission frame in the direction of the starting end portion of the feed chain, of the grain stalk original conveying device that conveys and inherits the cut grain culm toward the starting end portion of the feed chain. A drive unit for driving the end portion is provided, and the end portion faces the starting end portion of the feed chain.

[Problems to be solved by the invention]

However, in the above-mentioned prior art, when the horizontal pipe for rolling is rotated and rotated, the end portion of the grain culm stock carrier also rotates, and therefore the end portion moves away from the start end of the feed chain. There is a problem in that the distance between the two fluctuates as they approach or approach, and the inheritance depth of the grain culms changes, resulting in excess or deficiency in the handling depth in the threshing device.

In order to solve this problem, in Japanese Utility Model Laid-Open No. 60-33835, in the front part of the traveling machine body, in the vicinity of the starting end of the feed chain on one side of the traveling machine body, it extends in the front-back direction of the traveling machine body, and as it goes forward. A rolling pipe arranged in a front-down direction is provided, and a rolling hydraulic cylinder is mounted between a frame extending in the lateral direction of the traveling machine body with respect to the rolling pipe and the rolling-down cylinder is mounted on the frame. The base end of a pitching pipe is vertically rotatably mounted, the pitching pipe and the rolling pipe are connected by a hydraulic cylinder for pitching, and the reaping pretreatment device is rotated around the rolling pipe axis. At the same time, we proposed a structure to rotate the pitching pipe around the base end of the pitching pipe. Also, the gap between the grain culm joints between the terminal end of the grain culm stock carrier and the starting end of the feed chain in the pre-cutting apparatus is reduced.

However, according to this configuration, in addition to having to form the rolling pipe as the rolling axis to be considerably long, the distance between the grain culm receiving joints between the terminal end of the grain stalk stock carrier and the starting end of the feed chain is reduced. There was a problem that there was no guarantee that the change could be kept constant, only the change was reduced.

The present invention has been made to solve this problem, and positively sets the interval between the grain culm receiving joints between the terminal end of the grain stalk stock carrier and the starting end of the feed chain regardless of rolling of the pre-mowing treatment device. The purpose is to always keep constant.

[Means for solving problems]

In order to achieve the above object, in the present invention, a combine harvester which is arranged in front of a threshing device mounted on a traveling machine body is configured to be capable of rolling and pitching with respect to the traveling machine body via a rolling arm and a pitching arm. In the above, while the terminal end of the grain stalk pre-conveying device provided in the cutting pretreatment section is made to face the starting end of the feed chain so as to inherit the grain culm, the terminal end of the grain stalk pre-conveying device is connected to the feed chain. A structure that is configured to be expandable / contractible with respect to the starting end portion, and is configured to move the ending end portion in accordance with the rolling rotation of the rolling arm so that the distance between the ending end portion and the feed chain starting end portion is substantially constant. Is.

[Action and effect]

For example, when the rolling rotation fulcrum of the rolling arm and the feed chain that supports the pre-mowing pretreatment section so as to roll with respect to the traveling machine body are arranged on the right side in the traveling direction of the traveling machine body, the right side of the traveling machine body is below. If the left side of the mowing pretreatment unit is lowered and the rolling arm is rotated so that the mowing pretreatment unit is substantially horizontal to the field scene, the feeding chain on the traveling machine side moves to the right. The grain culm plant source transporting device in the pre-mowing processing unit moves to be relatively separated from each other, as described on the left.

Therefore, as in the prior art, if the terminal end of the grain culm plant source transporting device is configured to move completely integrally with the cutting pretreatment unit, the grain culm transfer between the terminal end and the starting end of the feed chain is performed. The space will be widened.

However, in the present invention, the terminal end of the grain culm stock carrier is configured to be extendable with respect to the feed chain starting end,
The rolling arm that changes the inclination posture of the cutting pretreatment unit in the left-right direction and the terminal end of the grain culm source transport device provided in the cutting pretreatment unit are linked by an operation wire or an appropriate position of the cutting pretreatment unit. When the end portion is about to be separated from the start end portion of the feed chain by rolling rotation of the arm by interlockingly connecting the end portion and the end portion with an operation wire, the end portion is approached in reverse, On the contrary, since it is related so as to move away when trying to approach, it is possible to positively correct the inheritance interval between the terminal end and the feed chain starting end so that it is always substantially constant, and the handling depth in the threshing device is made constant. The threshing work can be performed stably.

〔Example〕

Next, an embodiment of the present invention will be described. Reference numeral 1 is a combine traveling machine body having a pair of left and right traveling crawlers 2, 2, a threshing device 3 is mounted on the traveling machine body 1, and the threshing device 3 handles the threshing device 3. The handling cylinder in the room is arranged so that its axis extends along the traveling direction of the traveling machine body 1. Reference numeral 4 is a feed chain provided along the threshing device 3, the feed chain 4 is arranged along the left side in the traveling direction of the traveling machine body 1, the front end of the feed chain 4 projects forward from the front plate 3a of the threshing device 3, and The front end is arranged so as to face the end of the stock-source transporting device 6 in the pre-cutting processing section 5.

The reaping pretreatment unit 5 is provided via a machine frame 7 that projects to the front of the traveling machine body 1, and a plurality of grass bodies 8 and then a reaper 9 are provided at the lower end of the lower frame 7a of the machine frame 7. A plurality of grain culm raising devices 10 are provided on the front surface, and a scraping wheel 11, an ear tip conveying device 12, and a grain culm root conveying device 6 described later are provided.

Reference numeral 14 is a support frame that supports the cutting pretreatment unit 5 on the traveling machine body 1 so as to be freely pitched and rolling, and the support frame 14 is a pipe-shaped pitching that is attached to the base of the machine frame 7 of the cutting pretreatment unit 5. It comprises an arm 15 and a T-shaped or L-shaped rolling arm 16 in plan view, which supports the pitching arm 15 in a freely rolling manner.

The rolling arm 16 extends in the left-right direction of the traveling machine body, and the rotating shaft 17 at the base end thereof extends along the traveling direction of the traveling machine body 1.

The rotation shaft 17 is arranged in a device in front of the front plate 3a of the threshing device 3 of the traveling machine body 1, inside the machine body 1 at the starting end of the feed chain 4 and at a position closer to a lower portion than the end of the stock carrier transport device 6, A pair of front and rear struts 20 standing upright from the front frame 19 of the traveling body 1 and a rolling rotation bearing portion 2 at the upper end
It is rotatably supported by 1,21. Therefore, the rolling arm 16 pivots up and down with the axis of the pivot shaft 17 as the rolling pivot fulcrum 17a.
21 can be divided into two from the flange portion 21a portion.

On the other hand, near the tip of the rolling arm 16 and the front frame
The rolling arm 16 is connected by a forward-tilt prevention means 22 that supports the rolling arm 16 in a lateral direction substantially perpendicular to the longitudinal axis of the rolling arm 16 such that the rolling arm 16 cannot swing and can move up and down.

For example, as shown in FIG.
It consists of a pair of upper and lower links 45 and 46 that can be bent in a "U" shape when viewed from the front. As shown in FIG.
The lower end of the lower link 46 is pivotally attached to the pin 47, the upper end of the upper link 45 is pivotally attached to the rolling arm 16 to the pin 48, and the lower end of the lower ring 46 is attached to the pin 49 penetrating the front frame 19. Pivotally attached, the rolling arm 16 is moved to the rolling pivot fulcrum 17
Although it can be rotated up and down around a, it is configured so that the traveling body 1 is not bent or twisted in the front-back direction due to the weight of the pre-mowing processing unit 5.

Reference numeral 26 is a rolling drive means for vertically rotating the rolling arm 16 in the left-right direction of the traveling machine body 1, and in the illustrated embodiment, it is composed of a hydraulic cylinder mounted between the front frame 19 and the arm 18. Reference numeral 27 indicates the pitching arm 15 and the traveling body 1
It is a pitching drive means for rotating up and down along the front-back direction and is constituted by a hydraulic cylinder mounted between the rolling arm 16 and the pipe-shaped pitching arm 15.

The hydraulic cylinders that are the driving means 26 and 27 are so-called single-acting type, and hydraulic pressure is moved in and out from the hydraulic pump 29 mounted on the traveling machine body 1 through the switching valves 30 and 31, respectively (see FIG. 8). At this time, the switching valves 30 and 31 are manually switched, or a sensor (not shown) such as a sensor attached to the lower part of the mowing pretreatment unit 5 senses the interval with the field scene, or the mowing pretreatment unit 5 itself. It may be controlled so as to perform self-correction by sensing the forward tilt, the attitude, and the left-right tilt attitude.

Further, as the rolling driving means 26 and the pitching driving means 27, well-known driving means such as a combination of an electric motor and a screw rod may be used.

The rolling arm 16 is provided with a pair of left and right pitching rotary bearing portions 23, 23 projecting upward and forward of the traveling machine body, and a transmission case 24 to which the base portion of the pipe-shaped pitching arm 15 is attached is rotated. Support freely. As a result, the pitching arm 15 having the cutting pretreatment unit 5 attached to the front end
Can be rotated up and down about a pitching rotation axis 23a which is an axis of the pitching rotation bearing portions 23, 23.

The power transmission mechanism 25 from the power section of the traveling machine body 1 to the pre-cutting processing section 5 is as shown in FIG.
33 A pulley 32 to be transmitted supports the rotation shaft 17, and a support shaft portion 34 (built-in torque limiter) of the pulley 32 provided near the rear rolling rotation bearing portion 21 and a transmission shaft portion attached to the rolling arm 16. Flexible joint 35 that can be bent between 35 and 36
Connect via. At this time, the joint 36 and the transmission shaft portion 35 are arranged so as to overlap in the upper part of the distal end side portion of the arm 18 in a plan view, whereby the length of the joint 36 can be maintained even when the rolling arm 16 is rotated. It can be transmitted without changing too much. The transmission shaft portion 35 and the input shaft 37 to the transmission case 24 to which the base portion of the pitching arm 15 is attached are wound around the belt 38 and transmitted, and one grain culm raising device is transmitted from the input shaft 37 via the bevel gear 39 or the like. Power transmission to 10. In addition, the gear 42 and the bevel gear 43, etc. are transmitted to the scraping wheel 11, the reaper 9 and the other grain culm raising device 10 via the other bevel gear 40 of the transmission case 24, the shaft 41 in the pitching arm 15 and the like. The tip conveying device 12 and the grain stalk former conveying device 6 are driven via the.

As shown in FIGS. 3 and 6, the grain culm stock carrier 6 includes a drive chain 52 arranged on the lower surface of the main body case 51, a drive sprocket 53, a start end tension roller 54, and an end tension roller 55. It is wound around three places, and is arranged so that the outer peripheral portion of the end portion tension roller 55 faces the starting end portion of the feed chain 4.

Then, on the surface of the transport chain 52 between the starting end portion tension roller 54 and the end portion tension roller 55, a sandwiching rod 56 is arranged along the transport direction, and the sandwiching rod 56 is attached to the main body 51.
It is provided on a support body 58, which is attached via a substantially U-shaped connecting rod 57, by a force of a spring 59 in the direction of the surface of the conveying chain 52.

The base end portions 54a, 55a of the start end portion tension roller 54 and the end portion tension roller 55 are respectively fitted to guide members 60, 61 provided in a straight line so as to face each other on the back surface of the main body case 51 so as to be movable back and forth. Insert the main body case 51 and each of the base end portions 54a, 55
The tension rollers 54 and 55 are urged by the tension springs 62 and 63 mounted on a and so as to project outward (away from each other). Reference numerals 64 and 65 are grain culm winding prevention plates mounted on the upper and lower surfaces of the terminal end tension roller 55.

Then, the operation wire 66 having one end connected to the base end portion 55a of the terminal end tension roller 55 is inserted into the outer tube 67 fixed to the main body case 61 at one end, and the outer tube 67
The other end of 67 is fixed to a lower position of the traveling machine body 1 such as the front frame 19, while the other end of the operation wire 66 is connected to the rolling arm 16 from below, and the above operation is performed according to the vertical rotation of the rolling arm. The trailing end tension roller 55 is interlockingly connected to the starting end portion of the feed chain 4 so that the trailing end tension roller 55 moves to the right and left by an appropriate dimension (H1). That is, when the rolling arm 16 rotates upward, by pulling the operation wire 66, the end portion tension roller 55 is pulled away from the starting end portion of the feed chain 4, and conversely, the rolling arm is pulled.
When the lower part 16 is turned, the operation wire 6 is loosened to move the terminal end tension roller 55 to the feed chain 4.
The feed chain 4 and the trailing end of the grain stalk former source transporting device 6 in the pre-mowing processing unit 5 which is closer to the starting end of the traveling machine body 1 and thus tilts in a direction relatively opposite to the lateral tilt of the traveling machine body 1.
It is related so that the left-to-right direction interval with the starting end of the is maintained substantially constant.

Reference numeral 68 is a pinching guide rod that elastically urges the support 58, on which the pinching rod 56 is mounted, to the upper surface of the starting end portion of the feed chain via a spring 69.

In this configuration, when the front part of the traveling machine body 1 traveling in the field scene 50 is turned forward, the front end of the pre-cutting processing section 5 can be caught in the field scene 50. The switching valve 30 is switched through a sensor that detects the width of the gap between the lower end and the farm scene 50 to send hydraulic pressure to the hydraulic cylinder that is the pitching drive means 27 to raise the pitching arm 15 so that the tip end side of the pitching arm 15 is lifted and the mowing is performed. The height of the harvesting device 9 of the preprocessing unit 5 with respect to the farm scene 50 is controlled to be a predetermined height.

When the front part of the traveling machine body 1 is tilted so as to be lifted, contrary to the above, the mowing pretreatment part 5 is provided via the pitching drive means 27.
The pitching control is performed so as to lower the.

Furthermore, when one traveling crawler of the traveling vehicle body 1 falls into a recess such as a groove in the farm scene 50 and leans left or right, for example, when the traveling direction left leans downward, the right side of the mowing on the opposite side is cut. In order to lower the tip of the rolling arm 16 so that the vertical distance between the lower surface of the pretreatment unit 5 and the substantially horizontal farm scene 50 does not become large (see the chain double-dashed line in FIG. 1), the hydraulic pressure of the rolling drive means 26 is set. When the piston rod of the cylinder is retracted, and when the right side of the traveling machine body 1 is lowered, on the contrary, hydraulic pressure is sent to the hydraulic cylinder to lift the tip side of the rolling arm 16 (see the alternate long and short dash line in FIG. 1). The so-called rolling control is performed so that the left and right sides of the lower surface of the part 5 are at the same height as the farm scene 50.

The rolling rotation fulcrum 17a of the rolling arm 16 at the time of such rolling control is located near the starting end of the feed chain 4 in the threshing device, and the grain culm of the cutting pretreatment unit 5 is located on the side of the starting end of the feeding chain 4. Since the outer periphery of the tension roller 55 of the end portion of the original transport device 6 is exposed, if the end portion of the grain stalk original transport device 6 does not move to the left and right, rolling occurs as indicated by the chain double-dashed line in FIG. When the tip end side of the arm 16 is lowered, the grain stalk stock source transfer device 6 that moves according to the left-right inclination of the pre-cutting processing unit 5
Although there is a gap between the end tension roller 55 and the side of the start end of the feed chain 4, the end tension roller 55, which is attached via the operation wire 66 connected to the rolling arm 16 as in this embodiment, is By the force of the spring 63, it can be brought closer to the feed chain 4 side as shown by the alternate long and short dash line in FIG.

Similarly, when the tip end side of the rolling arm 16 is raised as indicated by the alternate long and short dash line in FIG. 1, the end portion tension roller 55 that tries to approach the side portion of the feed chain 4 start end portion is spring-loaded.
Since it can be pulled through the operation wire 66 against the 63 force and separated from the feed chain 4, regardless of the lateral swing of the grain stalk stock carrier 6 due to the rolling control, the feed chain 4 start end of the transfer point There is no change in the distance between the section and the end of the stock carrier device 6, and therefore, the handling depth is not excessive or deficient as the grain culm transfer depth varies.

In the above-mentioned embodiment, the operation wire 66 for moving the terminal end tension roller 55 of the grain stalk stock carrier 6 was connected to the rolling arm 16. It is needless to say that the operation wire 66 may be connected to an appropriate portion of the portion 5, and instead of the terminal end tension roller 55, a tension guide member of a conveyor chain that has the same function can be moved. It can also be interlocked with.

It goes without saying that the present invention can be applied to a type in which a pitching arm is mounted on a traveling machine body, a rolling arm is mounted on the pitching arm so that the rolling arm can be freely rolled, and a cutting pretreatment unit is mounted on the rolling arm. Absent. Further, when the rolling rotation fulcrum is located far away from the feed chain, the distance displacement of the terminal end of the grain culm stock conveying device 6 with respect to the feed chain start end becomes large, so that the effect of the present invention becomes more remarkable. Become.

Further, although not directly related to the present invention, as shown in FIG. 1, a plan view longitudinally extending in the front-rear direction of the traveling machine body 1 is provided on the same traveling machine body side surface (grain uncut side) where the feed chain 4 is provided. The character-shaped side divider 70 is provided so as to be biased by a compression spring 71 so that the side divider 70 and the reaping pretreatment unit 5 such as the rolling arm 16 are connected by another operation wire 72 so that the rolling arm 16 faces downward. When rotating (when the uncut side of the traveling machine body 1 is tilted downward), the side divider 70 can be associated so as to project outward from the side surface of the traveling machine body. As a result, it is possible to prevent the grain stalks to be planted in the field scene on the uncut side of the grain stalks from being caught in the side surface of the traveling machine body or the traveling crawler 2 below the traveling crawlers.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 shows I- of FIG.
A front view of the main part indicated by the line I, FIG. 2 is a side view of the front part of the combine, FIG. 3 is a plan view of the main part indicated by the line III-III in FIG. 2,
FIG. 4 is a plan view taken along line IV-IV in FIG. 2, and FIG. 5 is V in FIG.
-V line sectional view, FIG. 6 is a VI-VI line sectional view of FIG.
FIG. 7 is a schematic diagram showing power transmission to the pre-cutting processing section,
The figure is a diagram showing a hydraulic circuit for rolling and pitching. 1 ... Traveling machine, 2 ... Traveling crawler, 3 ... Threshing device, 4 ... Feed chain, 5 ... Mowing pretreatment section, 6 ...
… Grain stalk former transporter, 12 …… Ear tip transporter, 7 …… Machine frame, 8 …… Weeding body, 9 …… Mowing device, 10 …… Grain stalk raising device, 14 …… Support frame, 15 …… Pitching arm, 16 …… Rolling arm, 17 …… Rotation axis, 17a …… Rolling rotation fulcrum, 1
9 ... Front frame, 20,20 ... Posts, 21,21 ... Rolling rotary bearing, 23 ... Pitching rotary bearing, 23a ...
… Pitching rotation axis, 24 …… Transmission case, 25 …… Power transmission mechanism, 26 …… Rolling drive means, 27 …… Pitching drive means, 51 …… Main body case, 52 …… Transport chain, 53
...... Drive sprocket, 54 …… Starting end tension pulley, 54 …… Ending tension pulley, 56 …… Clamping rod, 58
…… Support, 60,61 …… Guide member, 62,63 …… Spring, 6
4,65 …… Prevention plate with grain culm, 66 …… Operating wire, 67 ……
Outer tube.

Claims (1)

[Claims] 1. A combine harvester comprising a pre-mowing treatment section arranged in front of a threshing device mounted on a traveling machine body so as to allow rolling and pitching with respect to the traveling machine body via rolling arms and pitching arms. The end part of the grain stalk source transporting device provided in the section is made to face the starting end of the feed chain so as to inherit the grain culm, while the end part of the grain stalk source transporting device is expandable / contractible with respect to the feed chain starting end. The harvesting of the combine is characterized in that the terminal end is moved in accordance with the rolling rotation of the rolling arm so that the distance between the terminal end and the feed chain starting end is substantially constant. Pretreatment device.