JP2011135830A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester which can smoothly lift and escape a reaping front processing portion from the surface of a field against upward pressures, thereby preventing the thrusting of the reaping front processing portion into the surface of the field to smoothly perform reaping works. <P>SOLUTION: The combine harvester turnably supports a lower gear case (17) at the tip end portion of a reaping support frame (16) on a lateral axis (P), integrally forms a reaping front processing portion (13) at the lower gear case (17), and is provided with a grounded sled body (22) in the lower portion of the reaping front processing portion (13), and further a hydraulic cylinder (23) for lifting and driving the reaping support frame (16) and a resilient member (37) for always urging the reaping front processing portion (13) on the lifting side on the basis of the reaping support frame (16). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a combine.

  Conventionally, as exemplified in Patent Document 1 below, a base portion of a cutting support frame is pivotally supported on a front portion of a chassis including a traveling device so that the cutting support frame can be pivoted up and down, and the cutting support frame is inclined forward and downward, A lower gear case is fixed to the front end portion of the cutting support frame, and a weed frame including a weed body at a front extension end with respect to the lower gear case, a pulling device disposed on the rear side of the weed body, A hydraulic pressure for integrally driving a cutting blade disposed on the rear side of the pulling device to form a pre-cutting processing unit, and providing a grounding type housing under the pre-cutting processing unit and driving the cutting support frame upward There is known a combine provided with a cylinder and an elastic body that constantly urges the cutting support frame toward the rising side.

JP 2007-116914 A

  However, in the above-described conventional combine, when the pre-cutting processing unit is pushed up by the unevenness of the field scene, the pre-cutting processing unit and the cutting support frame integrally rotate upward and retreat, so this cutting support The force that pulls out (forcibly extending) the hydraulic cylinder that drives the frame upwards is applied, and the pre-cutting processing part does not move up and down smoothly, and this pre-cutting processing part tends to break into the field and easily break. There was a problem that the mowing work could not be performed smoothly.

In order to solve the above-mentioned problems, the present invention takes the following technical means.
That is, the invention described in claim 1 is such that the base portion of the cutting support frame (16) is pivotally supported on the front portion of the chassis (1) provided with the traveling device (3) so as to be rotatable up and down, and the cutting support frame (16 ) Is tilted forward and downward, and the lower gear case (17) is supported at the front end of the cutting support frame (16) so as to be rotatable around the axis (P) in the left-right direction, and is supported with respect to the lower gear case (17). A weeding frame (19) having a weeding body (18) at the front extension end, a pulling device (20) disposed on the rear side of the weeding body (18), and a pulling device (20) A cutting blade (21) disposed on the rear side is integrally provided to form a pre-cutting processing unit (13), and a grounding type housing (22) is provided below the pre-cutting processing unit (13). A hydraulic cylinder (23) for driving the cutting support frame (16) upward, and the cutting support frame ( Is obtained by the combined, characterized in that provided pre-processing unit (13) an elastic body which always urged to the rising side of the (37) Reaper against 6).

  According to a second aspect of the present invention, the shaft (P) in the left-right direction is supported in the lower gear case (17), and the lower transmission shaft (30) for interlocking the pulling device (20) and the cutting blade (21). The combine according to claim 1, wherein the combine is made to coincide with the shaft core.

  The invention according to claim 3 is characterized in that the tip of the transmission shaft (26) bearing in the cutting support frame (16) and the lower transmission shaft (30) are interlocked in the lower gear case (17). The combine according to claim 2.

  According to a fourth aspect of the present invention, a part of the lower gear case (17) is cut away to form an open part (25), and the tip of the transmission shaft (26) is connected to the lower gear case via the open part (25). (17) The combine according to claim 3, wherein the combine is entered.

  According to a fifth aspect of the present invention, the housing (22) is attached to the weeding frame (19), and the cutting support frame (16) is arranged on the rear side of the housing (22). The combine according to claim 1, claim 2, claim 3, or claim 4, wherein (34) is attached.

  The invention according to claim 6 is characterized in that the rear side frame (34) is connected to a rear extension line (R) at the center in the width direction of the culm introduction path (R) formed between a plurality of adjacent weed bodies (18). The combine according to claim 5, wherein the combine is arranged on S).

  According to the first aspect of the present invention, when the pre-cutting processing part (13) is pushed up by the unevenness of the field scene, before cutting, the lower gear case (17) supported by the tip part of the cutting support frame (16) is used as the center. Since the processing section (13) rotates upward and retracts, the load for pulling out the hydraulic cylinder (23) that drives the harvesting support frame (16) to be pulled out is less likely to be applied during the ascent / retreat, and the pre-cutting processing section (13) can be raised and retracted smoothly, and the pre-cutting processing unit (13) can be prevented from being pushed into the field scene, and the cutting operation can be performed smoothly.

  According to the invention described in claim 2, in addition to the effects of the invention described in claim 1, the shaft core (P) serving as the rotation center when the pre-cutting processing part (13) is lifted and retracted is provided as a pulling device. (20) and the cutting blade (21) are aligned with the axis of the lower transmission shaft (30), and the lower transmission shaft (30) in the lower gear case (17) from the transmission mechanism in the cutting support frame (16). The power transmission mechanism can be simply configured and provided at low cost.

  According to the invention described in claim 3, in addition to the effects of the invention described in claim 2, the tip of the transmission shaft (26) and the lower transmission shaft (30) bearing in the cutting support frame (16) are provided. By linking in the lower gear case (17), the transmission mechanism from the transmission shaft (26) in the cutting support frame (16) to the lower transmission shaft (30) in the lower gear case (17) can be configured compactly, Grain buds, sawdust, and the like are less likely to accumulate in this transmission mechanism, and cutting operations can be performed smoothly.

  According to the invention described in claim 4, in addition to the effects of the invention described in claim 3, a part of the lower gear case (17) is notched to form the opening (25), and the cutting support frame (16) The lower gear case (17) is rotated by the upward rotation of the pre-cutting part (13) by allowing the tip of the inner transmission shaft (26) to enter the lower gear case (17) through the open part (25). Even if it moves, the power transmission from the transmission shaft (26) to the lower transmission shaft (30) can be stably performed, and the driving state of the pre-cutting processing unit (13) is stabilized to efficiently perform the cutting operation. be able to.

  According to the invention of claim 5, in addition to the effects of the invention of claim 1 or claim 2 or claim 3 or claim 4, the housing (22) is attached to the weeding frame (19), The cutting support frame (16) is attached with a rear casing (34) disposed rearward of the casing (22) so that the pre-cutting processing section (13) and the cutting support frame (16) are independent. The ground cutting support (7) is distributed and supported by the chassis (22) and the rear chassis (34) to reduce the ground load of each chassis and pre-cutting processing. The part (13) can smoothly follow the ground on the field scene, and the cutting operation can be performed smoothly.

  According to the invention described in claim 6, in addition to the effect of the invention described in claim 5, the rear rod body (34) is introduced into the cereal culm introduction path (18) formed between the adjacent weed bodies (18). R) was placed on the rear extension line (S) at the center in the width direction, introduced into the culm introduction path (R), pulled up by the pulling device (20), and cut off by the cutting blade (21). The rear housing (34) passes over the rear stump, so that the rear housing (34) is prevented from sinking and the cutting operation can be performed smoothly.

Side view for explaining the combine Plan view for explaining the combine Explanatory side view showing enlarged main part of combine Some explanatory perspective views Explanatory drawing showing the operating state Explanatory drawing showing the operating state Plan view for explaining the combine in the reference example Side view for explaining the combine in the reference example Plan view for explaining the combine in the reference example Block circuit diagram in the reference example

Embodiments of the present invention will be described with reference to the drawings.
Fig. 1 shows the fuselage structure.
This combine is provided with a traveling device 3 having a crawler 2 below the chassis 1, a threshing device 4 is mounted on the upper left side of the chassis 1, and a grain tank 5 having a discharge auger on the right side of the threshing device 4. It is set as the structure which provided the control part 6 in the front side of this Glen tank 5, and provided the cutting device 7 of the 3-row cutting in the front side of this control part 6 and the threshing apparatus 4.

  The traveling device 3 has a traveling mission case 8 attached to the front portion of the chassis 1 and is pivotally supported by left and right drive sprockets 9 and 9 and left and right wheel support frames 10 and 10 driven from the traveling mission case 8. The crawlers 2 and 2 are wound around a large number of roller groups 11. On the chassis 1, an engine 12 serving as a drive source for the traveling mission case 8, the threshing device 4 and the reaping device 7 is mounted.

Therefore, the harvesting device 7 includes a pre-cutting processing unit 13 and a supply conveyance unit 14.
That is, as shown in FIGS. 1 and 3, the base of the cutting support frame 16 is pivotally supported on the cutting suspension base 15 fixed to the upper portion of the traveling mission case 8 so that the cutting support frame 16 can be pivoted up and down. Three lower weed frames 19 that are inclined downward, support the lower gear case 17 at the tip of the cutting support frame 16, and have a weed body 18 at the front extending end with respect to the lower gear case 17, A pulling device 20 disposed on the rear side of the weed body 18, a cutting blade 21 disposed on the rear side of the pulling device 20, and a stock transport device 29 provided with a scraping device 28 are integrally provided for cutting. The preprocessing unit 13 is formed.

In addition, a grounding type housing 22 attached to the weeding frame 19 is provided below the pre-cutting processing unit 13.
A hydraulic cylinder 23 that drives the cutting support frame 16 upward is attached between the horizontal frame 1 a provided at the front portion of the chassis 1 and the central portion in the longitudinal direction of the cutting support frame 16.

  Further, between the portion above the mounting position of the base of the hydraulic cylinder 23 in the front portion of the chassis 1 and the portion above the mounting position of the piston tip of the hydraulic cylinder 23 in the cutting support frame 16 is cut. A compression spring 24 that constantly biases the support frame 16 to the ascending side is attached. The elastic force of the compression spring 24 is set slightly smaller than the weight of the entire cutting device 7.

As shown in FIGS. 2 and 4, a boss portion 16 a having a left and right rotation guide hole is attached to the distal end portion of the cutting support frame 16 so as to be orthogonal to the cutting support frame 16. The lower gear case 17 formed in a cylindrical shape is rotatably supported in the rotation guide hole of the boss portion 16a. An opening 25 is formed in the center of the lower gear case 17 in the form of a long hole in the circumferential direction. From the opening 25, a bearing is provided in the cutting support frame 16 to drive the engine 12. Is inserted into the lower gear case 17, and the output bevel gear 27 is fixed to the tip of the transmission shaft 26. Further, a lower transmission shaft is supported in the lower gear case 17 along the longitudinal direction of the lower gear case 17 and drives the pulling device 20, the cutting blade 21, the scraping device 28, and the stock transport device 29 in conjunction with each other. 30 interior.
The input bevel gear 31 fixed to the central portion in the longitudinal direction of the lower transmission shaft 30 is meshed with the output bevel gear 27 in the lower gear case 17. With this configuration, the pre-cutting processing unit 13 is supported, together with the lower gear case 17, so as to be pivotable back and forth around a horizontal axis P that is the same axis as the axis of the lower transmission shaft 30.

  A support stay 36 is extended from the middle part in the longitudinal direction of the cutting support frame 16 to the upper left and right sides, and a compression spring (elastic body) 37 is attached to the lower side of the extension end of the support stay 36. Then, the upper surface of the rear end portion of the arm 35 extending rearward and upward along the cutting support frame 16 from the outer peripheral surface of the lower gear case 17 with the lower end portion of the pressing pin 37a elastically biased downward by the compression spring 37. To hit. With this configuration, the pre-cutting processing unit 13 is always urged toward the ascending side with respect to the cutting support frame 16. The elastic force of the compression spring 37 is set to be slightly smaller than the weight of the whole cutting pretreatment unit 13.

  Then, a pair of upper and lower stays 38 are extended from the lower part of the cutting support frame 16 to the left and right sides, and the upper and lower stays 38 are arranged so as to sandwich the longitudinal central portion of the arm 35 from above and below. The upper and lower adjustment bolts 39 and 39 are respectively screwed and attached to the ends of the stay 38, and the upper and lower adjustment bolts 39 and 39 have their heads to restrict the vertical rotation range of the arm 35. That is, when the hydraulic cylinder 23 is extended and the entire cutting device 7 is raised to the non-cutting work height, the upper part of the arm 35 is moved upward by the weight of the pre-cutting processing unit 13 due to its own weight. In this configuration, the adjustment bolt 39 is regulated by coming into contact with the head. Similarly, when the housing 22 is greatly pushed up by a large convex portion of the farm scene, the lower surface of the arm 35 comes into contact with the head of the lower adjustment bolt 39, and the pre-cutting processing unit 13 and the cutting support frame 16 Will rise and evacuate together. The upward biasing force of the reaping device 7 at this time is due to the compression spring 24.

  The pair of upper and lower stays 38, the arm 35, and the upper and lower adjustment bolts 39, 39 are arranged at a site on the steering unit 6 side of the cutting support frame 16, avoiding the grain transportation path by the supply conveyance unit 14. As a result, the cereals conveyed by the supply conveyance unit 14 and the swarf falling off the cereals are not easily applied, and the operating state can be maintained smoothly.

  In addition, plate-like housings 22 refracted in three sides in a side view are attached to the lower side of the three weed frames 16 respectively. The housing 22 may be configured to arbitrarily adjust the mounting height with respect to the weeding frame 16.

  As shown in FIGS. 1 and 3, plate-like rear housings 34, 34 refracted in three sides in a side view are provided on the lower back side of the cutting support frame 16 via a support stay 33. , It is attached so as to be rotatable up and down around the axis Q in the left-right direction.

  As shown in FIG. 2, the rear housings 34, 34 are two symmetrically arranged about the cutting support frame 16 in the plan view. A corn straw introduction path R is formed between two adjacent weed frames 19, and the rear casing 34 is arranged on a rearward extension line S at the center in the width direction of the corn straw introduction path R. , 34 are arranged. With this configuration, the rear side bodies 34, 34 are sown on the stump after being weeded by the weed body 18, introduced into the culm introduction path R, raised by the pulling device 20, and cut by the cutting blade 21. This stump prevents the rear housings 34 and 34 from sinking.

5 and 6 show the operating state when overcoming the unevenness of the field.
Although not shown, the frame 40 is fixed to the upper part of the pulling transmission cylinder 39 that is raised from the lower gear case 17 and input to the upper back side of the pulling device 20, and the upper end of the frame 40 and the mowing suspension base 15 are fixed. Or you may connect between the upper end parts of the cutting support frame 16 with a tension spring. Due to the tension of the tension spring, the ground load of the housing 22 and the rear housing 34 can be reduced, and the compression springs 24 and 37 can be realized with a small elastic coefficient and can be provided at low cost.

  In the reference example shown in FIG. 7, a pair of ground-type cutting heights are provided on the weeding frame 19 at the left and right ends and the three weeding frames 19 arranged at intervals of two strips. A cutting height sensor including a sensor 41 and a non-grounded ultrasonic cutting height sensor 42 is attached. As shown in FIG. 8, the pair of ground-type cutting height sensors 41 and the ultrasonic cutting height sensor 42 are arranged separately on the left and right sides with respect to the weeding frame 19. The grounding type cutting height sensor 41 is configured to detect the turning angle of the antenna body 41a that is turned by contact with a farm scene by a potentiometer 41b, and the ultrasonic cutting height sensor 42 oscillates from an oscillator 42a. It is the structure which detects cutting height from the time until the ultrasonic wave which bounces back in a field scene and is received by the geophone 42b. By providing the cutting height sensor in this way, the detection accuracy of the ground height in the cutting width direction is improved, and all the detection results by the five pairs of sensors exceed the set values that are the conditions of the respective descending output If only the cutting down output is performed, it is possible to more accurately prevent the weed body 18 from entering the field scene. Further, when one of the detection results by the five cutting height sensors falls below a set value that is a condition for the rising output, the cutting increase output may be performed. A cutting height sensor including a grounding type cutting height sensor 41 and an ultrasonic type cutting height sensor 42 is attached only to the weeding frame 19 at the end of the already cut side, and the other cutting weed frames 19 are connected to the grounding type cutting height sensor. The high sensor 41 may be attached.

  Further, as shown in FIG. 9, the ground-type cutting height sensor 41 and the ultrasonic cutting height sensor 42 may be alternately arranged every two lines. As a result, cutting height control can be performed utilizing the advantages of the grounding type cutting height sensor 41 and the ultrasonic cutting height sensor 42. That is, the ground type cutting height sensor 41 is easy to catch mud and weeds when the aircraft is moving backward, but has the advantage that it can be accurately detected without being affected by weeds and the like when moving forward. Although it is easy to misdetect due to the influence, there is an advantage that it is difficult to catch sawdust and weeds.

  Thus, as shown in FIG. 10, the controller 43 has a grounding type cutting height sensor 41 on the input side and a set value that is a condition for operating the hydraulic cylinder 23 based on the detected value of the grounding type cutting height sensor 41. A setting dial 44 that changes the setting value, an ultrasonic cutting height sensor 42, a setting dial 45 that changes a setting value that is a condition for operating the hydraulic cylinder 23 based on a detection value of the ultrasonic cutting height sensor 42, Only one of the inclination detection sensor 46 for detecting the inclination angle, the changeover switch 47 for switching between the vehicle body horizontal control and the cutting height control, the grounding type cutting height sensor 41 and the ultrasonic cutting height sensor 42 is made effective. A changeover switch 48 for switching to a state is connected to a wetland / dryfield changeover switch 49 that is operated by determining whether the operator is a wetland or dry paddy field. The output side of the controller 43 is connected to the hydraulic cylinder 23 and the rolling cylinder 50 for vehicle body horizontal control.

  In an uneven field, the distance (height) from the cutting height sensor to the ground surface with respect to the reference surface is different. Under such field conditions, the setting dial 44 and the setting dial 45 can change the raising / lowering output reference of each cutting height sensor, so that all cutting height sensors can be used effectively. In addition, the cutting height control may be performed by making effective one of the ground-type cutting height sensor 41 and the ultrasonic cutting height sensor 42 with less variation in the detected value. Further, by operating the changeover switch 48, either the grounding type cutting height sensor 41 or the ultrasonic type cutting height sensor 42 can be selected and made effective. In an effective wet field, if the ultrasonic cutting height sensor 42 is activated, the cutting operation can be performed smoothly. Further, the switching between the ground-type cutting height sensor 41 and the ultrasonic cutting height sensor 42 can be switched by operating the wet paddy / dry pad changeover switch 49.

DESCRIPTION OF SYMBOLS 1 Chassis 3 Traveling device 13 Pre-cutting processing part 16 Cutting support frame 17 Lower gear case 18 Weeding body 19 Weeding frame 20 Pulling device 21 Cutting blade 22 Body 23 Hydraulic cylinder 25 Opening part 26 Power transmission shaft 30 Lower power transmission shaft 34 Rear side shaft Body 37 Elastic body P Shaft core R Grain introduction path S Back extension line

Claims (6)

A base portion of the cutting support frame (16) is pivotally supported on the front portion of the chassis (1) provided with the traveling device (3) so as to be pivotable up and down, and the cutting support frame (16) is inclined forward and downward. A lower gear case (17) is supported at the front end portion of the support frame (16) so as to be rotatable about a left and right axis (P), and a herbaceous body is provided at a front extension end portion with respect to the lower gear case (17). A weed frame (19) provided with (18), a pulling device (20) disposed on the rear side of the weed body (18), and a cutting blade (21) disposed on the rear side of the pulling device (20) Are integrally formed to form a pre-cutting processing part (13), and a grounding type housing (22) is provided at the lower part of the pre-cutting processing part (13), and the cutting support frame (16) is raised. The hydraulic cylinder (23) to be driven and the pre-cutting processing section (to the cutting support frame (16) ( 3) elastic body for always urged to increase side (combine characterized in that a 37) and. The left and right axis (P) is aligned with the axis of the lower transmission shaft (30), which is supported in the lower gear case (17) and interlocks the pulling device (20) and the cutting blade (21). The combine according to claim 1, characterized in that: The combine according to claim 2, characterized in that the tip of the transmission shaft (26) bearing in the cutting support frame (16) and the lower transmission shaft (30) are interlocked in the lower gear case (17). . A part of the lower gear case (17) is cut away to form an opening (25), and the tip of the transmission shaft (26) is inserted into the lower gear case (17) through the opening (25). The combine according to claim 3. The housing (22) is attached to the weeding frame (19), and the cutting support frame (16) is attached with a rear housing (34) disposed on the rear side of the housing (22). The combine according to claim 1, claim 2, claim 3 or claim 4. The rear side rod body (34) being arranged on the rear extension line (S) at the center portion in the width direction of the culm introduction path (R) formed between the plurality of adjacent weed body bodies (18). The combine according to claim 5, characterized in that:

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