JPS62118822A - 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] C. Industrial Application Field] The present invention relates to the structure of a pre-reaping treatment section in a combine harvester, and more specifically, to a combine harvester in which the pre-reaping treatment section is driven in pitching drive and rolling drive. .

[Prior art]

A combine harvester that threshes rice, etc. that has been planted in a field while reaping it, may cause the so-called pitching phenomenon in which the machine itself tilts back and forth due to undulations in the front and back of the running direction of the machine (hereinafter referred to as the machine), and the machine may tilt back and forth in the field. The so-called rolling phenomenon, in which the aircraft tilts from side to side, occurs due to surface undulations and running through soft wet fields.

Regardless of this phenomenon, the pre-reaping processing unit installed at the front of the machine is located at an appropriate height relative to the field, and the height above the ground remains approximately constant in the left and right directions of the machine.
It is necessary to ensure that there is no variation in the cutting height of the stem culm, and that the lower front end of the pre-cutting section does not plunge into the soil.

Therefore, a rolling arm is provided along the left and right direction of the machine, the base end of which is rotatably supported, and the distal end of which can be moved up and down by a hydraulic cylinder. A rolling drive is enabled in which the pre-reaping treatment section is tilted in the left-right direction by vertical movement of the arm, and the base end is pivoted in the middle of this rolling arm, and the distal end is attached to the lower part of the pre-reaping treatment section. By providing a pitching arm with side support and driving this pitching arm with a hydraulic cylinder to change the inclination angle of the pitching arm, it is possible to perform pitching drive to raise and lower the lower end of the pre-reaping treatment section. At the same time, the height of the lower end of the pre-harvesting process from the field surface is kept constant (According to Utility Model Publication No. 60-808).
No. 3).

[Problem that the invention seeks to solve]

However, this type of combine harvester detects the horizontal inclination of the pre-reaping processing section and drives the pre-reaping processing section in a rolling manner, and also detects the change in the cutting height caused by the rolling drive A movement and performs the rolling drive. After the cutting has progressed, the cutting height is adjusted by pitching the cutting pre-processing section.

Therefore, if the aircraft suddenly tilts to the left or right,
The pre-reaping treatment section cannot be quickly retreated from the field by rolling drive, and there is a risk that the lower front end of the pre-reaping treatment section may plunge into the soil.

[Means for solving problems]

In view of the above-mentioned circumstances, the present invention increases the pitching speed at which the pitching arm is driven to raise the lower end of the reaping pre-processing section, compared to the rolling speed at which the reaping pre-processing section is tilted from side to side by the rolling arm. Quickly move the pre-reaping treatment section away from the field to prevent the front end of the lower part of the pre-harvesting section from digging into the soil, and if the pre-harvesting section becomes higher than necessary above the field, lower it and remove the culm. The purpose is to prevent high mowing of the trees.

The present invention provides a rolling arm rotatably pivoted to the traveling machine body, and a pitching arm rotatably attached to the rolling arm. In the combine harvester, the pitching arm is driven to move the lower end of the reaping preprocessing section up and down in response to a rolling speed that drives the rolling arm to tilt the reaping preprocessing section from side to side. It is characterized by a high pitching speed.

[Effect]

By setting the pitching speed, which raises the lower end of the pre-reaping section, at a higher speed than the rolling speed, which tilts the pre-reaping section in the left-right direction, the pitching drive quickly follows the rolling drive that operates in advance. The lower end of the processing section can be quickly moved away from the field to prevent the lower front end of the pre-reaping processing section from plunging into the soil. Lower it to prevent high mowing.

〔Example〕

The present invention will be described in detail below based on drawings showing embodiments. 1 and 2 are a front left side view and a front view of a combine harvester according to the present invention. In Figures 1 and 2, 1
is a combine harvester machine having a pair of left and right running rollers 2.2, a threshing device 3 is mounted on the machine body 1, and the handling barrel in the handling chamber of the threshing device 3 is aligned with the axis of the machine body 1. They are arranged along the direction of travel. 4 is a feed chain installed along the threshing device 3, the feed chain 4 is arranged along the left side in the direction of movement of the machine body l, and the front end of the feed chain 4 extends forward from the front plate 3a of the threshing device 3. It is disposed so that the front end thereof faces the terminal end of a stock transfer device 6 in a reaping pre-processing section 5, which will be described later.

The reaping pre-treatment section 5 is rebuilt via a support arm 7 extending from the front part of the machine body 1, and a plurality of weeding bodies 8 are attached to the front end of the lower frame 7a of the support arm 7, and then A reaping device 9 is provided on the front side of the reaping pretreatment section, and a plurality of culm lifting devices 10 are provided on the front side of the reaping pretreatment section, and a raking wheel 11, a tip conveying device 12, and a stock head conveying device 6 are provided. .

FIG. 3 is a plan view of the main part indicated by the m-rn line in FIG. 1,
FIG. 4 is a perspective view of the main parts shown in FIG. 3.

Reference numeral 14 denotes a support frame on which the reaping pretreatment section 5 is attached to the machine body 1 so as to be pitchable and rolling. The base side of the support arm 7 (see FIG. 1) of the reaping pre-processing section 5 is attached to the support pedestal 14, and a pipe-shaped rolling arm 15 having an abbreviated shape in plan view and the rolling arm I5 are attached to the support frame 14. Attach the proximal end part to the middle part and attach the rolling arm 15.
A pitching arm 16 rotatably supported is provided.

The rolling arm 15 has a longitudinal direction extending in the left-right direction of the machine body 1, and a rotating shaft 17 to which a base end thereof is attached runs along the longitudinal direction of the machine body 1.

The rotation shaft 17 is disposed in front of the front plate 3a of the threshing device 3 of the machine body 1, inside the machine body 1 at the front end of the feed chain 4, and at a position closer to the bottom than the terminal end of the stock transfer device 6. A pair of front and rear rolling arm rotation wheel receivers 21, 21 are installed upright on the left frame 192 attached to the front frame 19 at an appropriate distance in the longitudinal direction of the aircraft.
It is rotatably supported.

The rolling arm 15 has an appropriate length from the rotation axis 17 to the rotation axis 1.
It has an oblique angle about f with respect to 7, and is directed toward the front plate 3a side of the threshing device 3 from the rotating shaft 17, and at a position an appropriate distance away from the rotating shaft 17, at the same height position, toward the front of the machine. It has a shape that is bent in the direction and extends in the left-right direction of the fuselage l (direction perpendicular to the longitudinal direction of the fuselage). The rolling arm 15 is located above the front frame 19, and is disposed close to and parallel to the front plate 3a of the threshing device 3.

This rolling arm 15 rotates about a rotation shaft 17 as a rotation fulcrum, and its tip portion moves up and down.

A pair of pitching arm rotation bearings 23.23 are provided on the upper side of the rolling arm 15, spaced apart from each other by an appropriate length in the left and right directions, and oriented in the longitudinal direction of the aircraft body 1. , and rotatably straddles a rotation shaft 24a that is integrally attached to the transmission case shaft 24. and,
The base end portion of the pitching arm 16 is attached to the transmission case shaft 24 at right angles to the longitudinal direction of the shaft. As a result, the pitching arm 16 can rotate about the rotation shaft 24a supported by the pitching arm rotation wheel receiver 23, 23, and its tip can move up and down.

A power transmission mechanism (see FIG. 4) that transmits power from the power section of the machine body 1 to the reaping pre-processing section 5 is a winnowing shaft 3S of the threshing device 3.
The rotation of the pulley 32 is transmitted to the pulley 32 by a belt 33, and the pulley 32 is driven to rotate. This pulley 32 is provided near the rolling arm rotation bearing section 21 on the front side that supports the rotation shaft 17, and is bent between the support section 34 of the pulley 32 and the transmission shaft section 35 attached to the rolling arm 15. They are connected via a freely telescopic joint 36.

An input shaft 37 (third
(see figure), an input shaft 37 is driven by tensioning a belt 38, and power is transmitted from this input shaft 37 to the shell culm lifting device 10 via a bevel gear 39 and the like. Moreover, the bevel gear 4 other than the inside of the transmission case shaft 24
0 and the scraping wheel 11.0 through the shaft 41 etc. in the pitching M16. Power is transmitted to the reaping device 9 (see FIG. 1), and the ear tip conveying device 12 and stock head conveying device 6 shown in FIG. 1 are driven via a transmission mechanism such as gears and bevel gears (not shown). It is.

Reference numeral 26 designates the rolling arm 1 so as to maintain the reaping pre-processing section 5 in a substantially horizontal state regardless of the tilting of the machine body 1 in the left and right direction.
The rolling drive means for vertically moving the tip of the rolling arm 5 consists of a hydraulic cylinder 26a installed between the front frame 19 and the rolling arm 5, and its piston rod 26b is arranged to be approximately vertical. Rolling @
The hydraulic cylinder 26a is pivotally connected to a bracket 46 protruding from the front end of the hydraulic cylinder 26a, and the base end of the hydraulic cylinder 26a is attached to the front frame 1.
It is pivotally attached to a bracket 47 such as 9 with a pin, so that the pre-reaping treatment section 5 can be freely tilted in the left-right direction of the machine body l.

Reference numeral 27 denotes a pitching drive means having a function of regulating the rotation of the pitching arm 16 during the rolling rotation of the rolling arm 15. The pitching drive means 27 includes a hydraulic cylinder 27a, and the base end of the hydraulic cylinder 27a Bracket 48 attached to the front frame 19, etc., and the aircraft body ■
The piston rod 27b is connected to a bracket 50 attached to the lower surface of the pitching arm 16 via a ball joint 51. Also pitching arm 16
The tip supports the lower side of the pre-reaping treatment section 5, and the lower end of the pre-reaping treatment section 5 is raised and lowered by driving the pitching arm.

FIG. 5 shows a hydraulic circuit for rolling or pitching the reaping pre-processing section. The hydraulic cylinder 26a is a double-acting type, and the hydraulic cylinder 27a is a single-acting type. It is driven by pressure oil from a hydraulic pump 29.291 driven by a transmission shaft (not shown). That is, a 4-point, 3-position switching type electromagnetic switching valve 30 connected in series to the hydraulic pump 29 and a 4-point, 3-position switching type electromagnetic switching valve 31 connected in series to the hydraulic pump 291. The pressure oil is transferred to the hydraulic cylinder 26.
The rolling arm 15 and the hitting arm 16 are driven by moving the arm 15 in and out of the arms 27a and 27a.

A relief valve vo is provided on the artificial side of the electromagnetic switching valve 30, and a pilot-operated check valve Vs is provided in the hydraulic circuit between the electromagnetic switching valve 30 and the hydraulic cylinder 27a. When Vs is opened, the piston rod 27b is retracted by the weight of the pre-reaping treatment section 5, and the pre-reaping treatment section 5 is lowered. On the other hand, a relief valve vo is provided on the outlet side of the hydraulic pump 291.
A flow rate adjustment valve Vc is provided in the hydraulic circuit between the hydraulic pump 291 and the electromagnetic switching valve 31, so that the flow rate of pressure oil to the hydraulic cylinder 26a can be adjusted.

That is, by throttling this flow rate regulating valve Vc, the piston rod 26b of the hydraulic cylinder 26a that is driven in a rolling manner is
The operating speed of the piston rod 27b of the hydraulic cylinder 27a that performs pitching driving can be made lower than that of the piston rod 27b.

That is, the pitching speed at which the lower end portion of the reaping pre-processing section 5 is raised and lowered by the pitching drive is higher than the rolling speed at which the reaping pre-processing section 5 is tilted in the left-right direction by the rolling drive.

In addition, by connecting and driving the hydraulic pumps 29 and 291 to the mission shaft of the engine, the hydraulic pump 29 and 291
and 291 are driven in accordance with the traveling speed of the aircraft 1,
The rolling speed for tilting the reaping pre-processing section 5 in the left-right direction and the pitching speed for raising and lowering its lower end portion correspond to the traveling speed of the machine body 1.

The electromagnetic switching valve 31 for correcting the left-right tilted posture of the reaping pre-processing section 5 to a horizontal state is activated when the right side of the machine body 1 is lowered in response to a detection signal from a horizontal sensor 52 shown in FIG. 4 attached to the rolling arm 15. If it tilts to the right, solenoid 31
If the left side of the aircraft l is lowered and tilted to the left, the solenoid 31d of the electromagnetic switching valve 31 is energized to switch the electromagnetic switching valve 31 in the direction of the arrow or in the opposite direction to drive the rolling arm 15. The pre-reaping processing section 5 is controlled so that its left-right tilted posture is always maintained in a horizontal state.

The electromagnetic switching valve 30 that raises and lowers the lower end of the reaping pre-processing section 5 switches the electromagnetic switching valve when it detects that the cutting height is low based on the detection signal of the cutting height sensor 28 shown in FIG. When the solenoid 30u of the valve 30 detects that the cutting height is high, the solenoid 30d is energized, the electromagnetic switching valve 30 is switched in the direction of the arrow or the opposite direction, and the pitching arm 16 is driven to perform the cutting. Control is performed such that the distance between the field surface and the lower end of the pre-reaping section 5, that is, the reaping height, is always constant by raising and lowering the lower end of the pre-treatment section 5. The electromagnetic switching valve 30 is controlled by a solenoid 30d that switches the electromagnetic switching valve 30.

30u can also be selectively switched using a manual operation switch.

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

As shown in FIG. 2, when the combine harvester configured in this way runs on a field scene 45 that is substantially horizontal in the left-right direction, the reaping device 9 and the rolling arm 15 in the pre-reaping processing section 5 are It is held substantially horizontally with respect to the surface 45.

Therefore, when one of the running rollers of the machine body falls into a recess such as a groove in the field area 45, and the machine body l is tilted downward to the right side (or left side: not shown in this case), that is, the second
As shown by the dashed line in the figure, when the left side (or right side) of the machine body 1 is tilted downward when viewed from the front, the horizontal sensor 52 detects that the machine body 1 and the reaping pre-processing section 5 are on the right side (or left side).
PI), and the solenoid 31u (or 31d) of the electromagnetic switching valve 31 is energized by the sensing signal. As a result, the electromagnetic switching valve 31 switches in the direction of the arrow (or in the opposite direction) to send pressure oil to the side of the hydraulic cylinder 26a where the piston rod 26b is to advance (or enter), and the piston rod 26b is advanced (or entered). (exit)
By pushing up (or pulling down) the tip side of the rolling arm 15,
The pre-reaping processing unit 5 is corrected so that it is approximately horizontal.

Along with this corrective operation of the pre-reaping processing section 5, the right side of the pre-reaping processing section 5 rises (or descends), and the reaping height sensor 28 indicates that the height above the ground has become higher (or lower). is detected and the solenoid 30d of the electromagnetic switching valve 30 is activated.
(or 30u) and drives the pitching arm 16 to lower (or raise) the lower end of the pre-reaping processing section 5 to correct the appropriate cutting height.

Since the reaping height m is adjusted by sending the pressure oil from the hydraulic pump 29 directly to the hydraulic cylinder 27a as described above, the operating speed of the piston rod 27b is faster than the operating speed of the piston loft 26b that performs the rolling action. Therefore, the lower end of the reaping pre-processing section 5 is lowered (
or increase).

Therefore, even if the aircraft 1 is tilted to the left or right,
It is possible to prevent the front end of the lower part of the pre-reaping treatment section 5 from plunging into the soil, and it is also possible to avoid a high mowing condition that occurs during a correction operation to level the pre-reaping treatment section 5.

Further, in the combine harvester configured in this way, the reaping height sensor 28 always detects the reaping height of the culm while traveling in the field area 45, and the solenoid switching valve 30 is switched in a predetermined direction to control the pitching drive means 27. Pressure oil is sent to the hydraulic cylinder 27a to adjust the cutting height so that the height of the lower end of the cutting pretreatment section 5 from the ground is constant.

According to this embodiment, the rolling and pitching drives of the reaping pre-processing section 5 are caused to have different driving speeds by controlling the flow rate of pressure oil, but the diameter of the hydraulic cylinder or the discharge amount of the hydraulic pump is different. may cause a difference. Alternatively, by electrical control, for example, the electromagnetic switching valves 30 and 31
A similar operation can also be performed by exciting the solenoid with a pulse current and making the duty ratio of the pulse current different.

〔effect〕

As described in detail above, the present invention has a structure in which the pre-reaping treatment section of a combine harvester can perform rolling drive and pitching drive, and the pitching speed that raises the lower end of the pre-reaping section by the pitching drive is controlled by the rolling drive. Since the rolling speed is faster than the rolling speed at which the pre-cutting section is tilted left and right, even if the machine is tilted suddenly, the lower end of the pre-cutting section can be quickly evacuated from the field. If the pre-reaping treatment section 5 rises above the field more than necessary, it can be lowered to prevent the pre-reaping treatment section 5 from pushing into the field, and from high mowing. Furthermore, it is possible to provide a high-performance combine harvester that is effective in reaping operations in fields where pitching and rolling phenomena occur frequently.

[Brief explanation of drawings]

1 and 2 are a front left side view and a front view of a combine harvester according to the present invention, and FIG. 3 is a l-lff in FIG. 1.
FIG. 4 is a perspective view showing the main parts shown in FIG. 3, and FIG. 5 is a hydraulic circuit diagram showing a hydraulic circuit for pitching or rolling the reaping pretreatment section. . 1... Traveling machine body 3... Tax grain device 5... Reaping pre-processing section 9... Reaping device 15... Rolling arm
16...Pitching arm 26...Rolling drive element @27...Pitching drive means patent Applicant Yanmar Agricultural Machinery Co., Ltd. Agent Patent attorney Noboru Kono Noboru 2nd item 51 yen

Claims (1)

[Claims] 1. The reaping pre-processing section disposed in front of the threshing device mounted on the traveling machine is equipped with a rolling arm rotatably pivoted to the traveling machine body, and a pitching arm rotatably attached to the rolling arm. In the combine harvester, the pitching arm is driven to move the lower end of the reaping pre-processing section up and down in response to the rolling speed at which the rolling arm is driven to tilt the reaping pre-processing section from side to side. A combine harvester characterized by its high speed.