JP2788610B2 - Combine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine constructed to run on a pair of right and left crawler running devices. 2. Description of the Related Art In a combine operation in a wet field, a crawler traveling device often sinks in a field, and as a means for raising the machine to a desired level at this time, for example, Japanese Utility Model Application Laid-Open No. 58-174385. As shown in the figure, a support frame having a ground-side idle wheel is connected to the body frame via a link mechanism, and the link mechanism is driven to swing by a hydraulic cylinder to move the support frame relative to the body frame. Is known in which the ground contacting portions of the crawler belts of the left and right crawler traveling devices are relatively moved up and down by the same amount with respect to the machine body. [0003] However, the above-mentioned known technique has a structure in which the support frames of the left and right crawler traveling devices are moved up and down in the same direction in synchronization with each other. However, it does not have a function to correct the horizontal inclination of the aircraft, and if there is a difference in the amount of settlement between the left and right crawler traveling devices in wet fields and the aircraft is inclined left and right, ridged wheat etc. When one of the left and right crawler traveling devices travels on the ridge and the other travels on the ridge in the harvest, the aircraft leans to the left or right, or the weight of the aircraft itself depends on the weight of the attached equipment and the crop. In such a case that it collapses and tilts left and right, it cannot be dealt with. In addition, in the above-described known example, since the tension idler wheels are provided on the body frame side, in order to absorb an increase in the winding length of the crawler belt when the support frame is lowered relative to the body frame. In addition, it is necessary to provide a structure in which the tension idler wheel is displaced backward by the tension of the crawler belt, that is, an automatic tension structure. However, if the tension idler is made to move freely by using an automatic tension structure,
For example, when the crawler traveling device hits a ridge or the like during reverse travel, the idler wheels for tension are displaced to the belt loose side, causing the crawler belt to loosen, which causes inconvenient situations in which dewheeling occurs. Is easy to invite. Also, it is necessary to set the amount of movement of the tension idler wheels in accordance with the amount of elevation of the support frame so that the greater the amount of elevation, the greater the amount of movement. Due to the characteristic that the tension change due to the automatic tension of the idler wheel also becomes large, it is difficult to keep the crawler belt tension constant with the automatic tension structure, and it is not possible to remove the wheel or move up and down smoothly Alternatively, there are various problems that it is difficult to set the amount of elevating and lowering of the support frame to be too large. In addition, as described above, in the combine, there are many operations by forward / reverse switching operation such as turning around near the ridge, and in the automatic tension structure, the reaping occurs when the vehicle reverses and the reaping is performed, and the mowing work is inefficient. There was a possibility that. The present invention has been made in view of such a point, and by improving the elevating structure of the crawler traveling device, it is possible to solve the problems seen in the above-mentioned prior art means, and to improve the body height and the body. It is an object of the present invention to provide a combine which can perform the right and left inclination adjustment arbitrarily and appropriately, and can preferably perform a combine operation while suitably maintaining a desired body height and a right and left inclination posture regardless of a wetland and a field. And [0004] The technical means of the present invention taken to achieve the above object is to connect a cutting pretreatment device to a front portion of a body having a pair of right and left crawler traveling devices. In a combine having a threshing device mounted on the fuselage, a driving wheel is fixed to a drive shaft extending from a transmission case fixed to the forward frame of the fuselage frame, and the body is connected via a front and rear swing link. A supporting frame, which is attached to the frame so as to be vertically movable, is provided with a free wheel and a tension adjusting free wheel of a position adjustment fixed type, and the driving wheel, the free wheel, and the tension free wheel are provided. An operation arm, wherein a hydraulic cylinder for driving and oscillating the oscillating link is swingable integrally with one of the front and rear swing links. Department and machine A pair of left and right crawler traveling devices is provided on each of a pair of left and right crawler traveling devices so as to be able to be driven up and down separately from each other while extending over the body frame. A supporting frame is supported on a link portion extending to the side, and the operating arm portion connects a hydraulic cylinder to a portion extending above the swing fulcrum, and swings the swing link. A crawler traveling device is provided in which the direction is set so that the support frame moves in the forward direction as the support frame descends relative to the body frame, so that the crawler traveling device can be individually raised and lowered. The operation of the above-described technical means is as follows. According to the configuration of the present invention, the support frames of the left and right crawler traveling devices can be driven up and down by the same amount in the same direction with respect to the body frame, so that the aircraft can be moved up and down in parallel. Each supporting frame is individually and arbitrarily driven up and down relative to the body frame, so that the height of each ground contact portion of the left and right crawler traveling devices with respect to the body frame is different, thereby adjusting the horizontal inclination of the body. It is possible to do. Since the tension idler is provided with a fixed position adjustment type idler as the idler, for example, when the tension idler has an automatic tension structure so that it can move freely, It is easy to avoid such an inconvenience that the idler wheel for tension is displaced toward the belt loose side when the crawler traveling device hits a ridge or the like and the crawler belt is loosened. In the operation of raising and lowering each support frame, for example, when the support frame is moved down from an ascending state (a state where the body height is low) close to the body frame and the body is driven up, the support frame is moved forward. The vertical distance between the idler wheel and the driving wheel of the part increases, but the entire support frame approaches the driving wheel side, and the tension is fixed by adjusting the position of the driving wheel and the rear of the supporting frame. Because the distance between the idler wheels is shorter, when the support frame is lowered relative to the body frame, the crawler belt tension is almost constant by making the crawler belt wrap length almost the same as that before the lowering. The support frame can be smoothly moved up and down while keeping the height. In addition, since the supporting frame equipped with the idler wheel and the position adjusting fixed type idler wheel is raised and lowered, and the rubber belt is used for the crawler belt, the swing link swings. It is difficult to move the belt while keeping the belt circumference unchanged, due to the difference between the amount of vertical movement and the amount of forward / backward movement caused by the lifting / lowering of the support frame accompanying the movement of the supporting frame. Even if there is some error in the trajectory of the swing link for moving the support frame up and down while maintaining
By making use of the elasticity of the belt itself and absorbing it, it is possible to more effectively raise and lower the support frame while keeping the circumferential length of the crawler belt substantially constant. The swing link supports a support frame at a link portion extending from the swing fulcrum on the fuselage frame side to the rear side of the fuselage, and the operation arm portion extends above the swing fulcrum. The change in the position of the support frame at the end of the swing link with respect to the change in the swing angle of the operating arm is the proportion of the change in the up and down direction of the support frame becomes smaller as the amount of descent increases. There is a tendency for the rate of change to increase. In other words, since the tension idler wheel is of a fixed position adjustment type, the operability is improved by increasing the ratio of the vertical position change of the support frame to the operation amount of the operation arm portion in a range where the tension is not so high, In the range where the tension increases, the ratio of the moving component in the front-rear direction of the support frame is increased so that the belt can be lowered while suppressing the increase in the belt tension. Accordingly, the present invention has the following effects [1] to [5]. [1] The transmission of power from the transmission case to the crawler traveling device maintains a simple structure without using a complicated mechanism such as operating the drive wheel body with a refraction-type power case interposed therebetween. Regardless of whether the support frame is moved up and down relative to the crawler belt, the length of the crawler belt winding path can be maintained almost constant, and the crawler belt circumference is almost constant, and the aircraft height and the lateral inclination of the aircraft are maintained. Can be adjusted smoothly and stably. [2] A good harvesting operation can be performed in a state where not only the ground posture of the combine but also the ground height is properly maintained. That is, the combine is often used in a wet field, which is a difficult work area. In such a wet field, when the degree of hardness of the field, which is a running surface, is different between the left and right crawler traveling devices, or when the weight balance of the entire body is lost due to an increase in the weight of harvested kernels, one side of Of the traveling device may sink relatively deeper than the traveling device on the other side, and accordingly, the body may be inclined left and right. When this happens, the steering direction of the aircraft changes to the crawler traveling device side that has sunk, and the cutting pretreatment device escapes laterally to the rice, making it impossible to perform normal cutting work. However, in the present invention, it is possible to adjust the height of the fuselage and the left and right inclination as described above, so that such trouble is eliminated. A good mowing operation can be performed while maintaining straightness. Also,
When one of the crawler traveling devices sinks, not only the change in the steering direction as described above occurs, but also the cutting blade inclines in the left and right direction and one rushes into the soil, or one cuts low, and the other cuts high. As a result, the harmful work becomes impossible or difficult, and the harmful effect is caused at the same time. However, since the height of the machine body and the lateral inclination can be adjusted as described above, such a harmful effect can be eliminated. [3] The drive wheels are arranged in the forward direction, and the upper portion of the crawler belt is set to the pulling side when the machine body for performing the reaping operation is advanced, so that the flutter of the crawler belt of the upper portion during the reaping operation is reduced. Occurrence of vibrations and the like due to flapping of the crawler belt in the upper portion can be reduced, and the crawler traveling device can be driven up and down satisfactorily with the circumferential length of the crawler belt being substantially constant, so that a satisfactory mowing operation can be performed. [4] By combining and configuring a rubber crawler belt, the elasticity of the crawler belt can be used to smoothly adjust the body height and the lateral inclination of the body under a substantially constant circumferential length of the crawler belt. Can be. [5] In operating the operating arm, the swing link, and the supporting frame by operating the hydraulic cylinder, the vertical position of the supporting frame with respect to the operation amount of the operating arm is changed in a range where the tension of the crawler belt is not so high. In the range where the tension increases, the ratio of the moving component in the front-rear direction of the support frame is increased to lower the belt tension while suppressing the extreme increase in the tension. Thus, the height can be adjusted with relatively good operability while avoiding a decrease in the durability of the belt. [6] As described above, since the harvesting operation can be performed in a state where not only the ground posture of the combine but also the ground height is properly maintained, the straightening performance is good, and the threshing machine is kept horizontal.
It is possible to realize a combine in which there is no uneven distribution of the grains, the sorting performance is stable, and escape from the wetland is easy. [0007] As shown in FIG. 4, a planted grain culm is raised and cut at the front of a body equipped with a pair of right and left crawler traveling devices 1 and 1 and equipped with a threshing device 3. A pre-cutting device 4 for supplying the cut culm to the threshing device 3 is provided to constitute a combine. Since the left and right crawler traveling devices 1 and 1 have the same structure, the left crawler traveling device 1 will be described below.
Will be described only. As shown in FIG. 1 and FIG. 2, a driving wheel 5 attached to a body frame 2 constituting a body through a transmission case 10 and a swing link mechanism 11 described later to the body frame 2. A rubber crawler belt extends over each of a plurality of idler wheels 7 attached to a connected support frame 6 and a tension adjusting idler wheel (idle wheel having a function of adjusting tension) 8 of a position adjustment fixed type. 9 and a transmission case 10
The drive wheel 5 is driven by the power of the drive shaft (5A) extended from the drive shaft 5 to drive the crawler belt 9. The swing link mechanism 11 includes a pair of front and rear swing links 12b, 12b pivotally attached to the body frame 2, and an operating arm 1 that swings integrally with one of the swing links 12b.
The telescopically adjustable rod 13 whose both ends are separately connected to the operating arm portion 12a that swings integrally with the swinging link 12b and the other swing link 12b, which is caused by a manufacturing error or an assembly error of the link mechanism component. In order to prevent the twisting, the swinging link 12b on the front side of the fuselage and the sub swinging link 19 connecting the support frame 6 are formed. The rod portion 14a of the hydraulic cylinder 14 is interlocked with the operating arm portion 12a that swings integrally with the swing link 12b on the rear side of the fuselage, so that the rod portion 14a is supported on the fuselage frame 2 by the hydraulic cylinder 14 as a drive mechanism. The frame 6 can be moved up and down. The hydraulic cylinders 14 are arranged on the right and left sides so that the right support frame 6 can be similarly raised and lowered. By operating each of the hydraulic cylinders 14 and 14, respectively, the inclination of the body with respect to the running ground is controlled. Adjustable. The swing links 12b, 12b support the support frame 6 at a link portion extending from the swing fulcrum on the side of the body frame 2 to the rear side of the body, and the operation arm portion 12a moves upward from the swing fulcrum. The hydraulic cylinder 14 is connected to the extended portion. More specifically, the hydraulic cylinder 14 transmits the operating force to any of the pair of front and rear swing links 12b, 12b via the operating portion arm 12a and the rod 13, and the pair of swing links 12b, 12b As the swinging operation is performed, the supporting frame 6 is moved forward and backward in the front-rear direction so that the supporting frame 6 is relatively lowered with respect to the body frame 2 in accordance with the swing. On the other hand, it goes up and down. Even if the support frame 6 is relatively lowered, the distance between the driving wheel 5 and the frontmost idler wheel 7 provided on the support frame 6 is longer than before the lowering, whereas the entire support frame 6 is Drive wheel 5 in front and rear direction
By moving to the existing side, the driving wheel 5 and the tension idler 8
Is shorter than before the descent, and the crawler belt winding path length increases (between the frontmost idler wheel 7 and the driving wheel 5) and decreases (the driving wheel 5 and the tension Between the drive wheel 5 and the idler wheel 7 and the tension idler wheel 8 when the support frame 6 is lowered relative to the machine body. The hanging path length is substantially the same as that before descending. Reference numeral 15 in FIG. 2 denotes a movable roller provided at an intermediate portion in the front-rear direction of the support frame 6, and a support arm 16 supporting the movable roller 15 is vertically swingable about a horizontal axis. In addition, it is provided on the support frame 6 in a state of being urged downward. 1 and 2 is a screw shaft for adjusting the tension of the crawler belt 9;
By operating the rotation operation portion 17a provided on the screw shaft 17, the slide frame 18 provided with the position adjustment fixed type idler wheel 8 with respect to the support frame 6 is extended and contracted in the front-rear direction. The tension of the crawler belt 9 is adjusted. [Alternative Embodiment] In the above embodiment, the sub swing link 19 is provided between the front swing link 12b and the support frame 6, but the sub swing link 19 is supported by one of the pair of swing links 12b, 12b. It may be provided anywhere between the frame 6 and the rod 13. In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings] FIG. 1 is a cutaway plan view of a crawler traveling device. FIG. 2 is a side view of the crawler traveling device. FIG. 3 is a sectional view taken along line III-III in FIG. 2; FIG. 4 is a side view of the entire combine. [Explanation of symbols] 1 Crawler traveling device 2 Airframe 3 Threshing device 4 Harvesting pretreatment device 5 Drive wheel 6 Support frame 7 idle wheels 8 Tension idlers 9 Crawler belt 12a Operation arm 12b Swing link 14 Hydraulic cylinder

Continuation of front page (56) References JP-A-59-38108 (JP, A) JP-A-56-58417 (JP, A) JP-A-61-106491 (JP, U) JP-A-61-67078 (JP, A) , U) Fully open sho 59-74129 (JP, U) Fully open sho 58-88041 (JP, U) Fully open sho 61-67078 (JP, U) (58) Fields studied (Int. Cl. ⁶ , DB Name) B62D 55/116 A01D 67/00 B62D 55/30

Claims (1)

(57) [Claims] A combine having a cutting pre-processing device (4) connected to a front portion of a body provided with a pair of right and left crawler traveling devices (1) and a threshing device (3) mounted on the body. In the above, the driving wheel (5) is connected to the body frame (2) on the forward direction side.
The drive shaft (5) extending from the transmission case (10)
A), and the front and rear swing links (12b), (12b)
b) a supporting frame (6), which is attached to the body frame (2) so as to be able to move up and down, is equipped with idlers (7) and tension adjusting idlers (8) of fixed position adjustment type; A crawler belt (9) made of rubber is wound around the driving wheel (5), the idle wheel (7), and the tension idle wheel (8) to constitute the crawler traveling device (1). The hydraulic cylinder (14) for driving and oscillating the swing links (12b), (12b) is connected to the front and rear swing links (12).
b) and a pair of left and right crawler traveling devices (1) provided in a state extending over an operation arm portion (12a) and a body frame (2) which can swing integrally with one of (12b), The left and right crawler traveling devices (1) are configured so as to be able to be individually driven and raised and lowered, and the swing links (12b) and (12b) extend from the swing fulcrum on the machine frame (2) side to the machine rear side. The link portion supports a support frame (6), and the operating arm portion (12a) connects a hydraulic cylinder (14) to a portion extending above the swing fulcrum, and the swing link. The swing direction of (12b), (12b)
A crawler traveling device is provided which is set so that the support frame (6) moves in the forward direction as the support frame (6) relatively lowers with respect to the body frame (2), so that the crawler traveling device can be individually raised and lowered. A combine that is characterized by: