JPS59169414A - Power transmission device of agricultural machine - 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 The present invention relates to a power transmission device for transmitting the rotation of an original Nb machine to a working part in an agricultural working machine.

In agricultural machinery such as combine harvesters, binders, and tillers,
The rotation of the prime mover is transmitted to the traveling section via a running latch and a transmission, and is also transmitted to the working section via another clutch and transmission.

Among these, the transmission device installed in the working part consists of a belt stretched between a pulley on the drive shaft and a pulley on the driven shaft, one pulley consisting of a fixed disk and a moving disk, and the moving disk is fixed. Conventionally, a belt-type transmission device has been generally used, in which the operating diameter of a belt is changed by moving it forward and backward relative to a disk to change the speed. Clutches installed in the working section include belt-type clutches that connect and disconnect power transmission by loosening and loosening a belt stretched between the driving shaft and the drive shaft using a tension pulley, and friction-type clutches. Cone clutches and the like are commonly used.

However, in all conventional power transmission devices for working parts, the transmission and clutch are installed between separate shafts as described above, requiring an intermediate pulley and resulting in a complicated structure. The drawbacks are that it occupies a large space and the machine base is too large to be configured compactly.

The present invention has been made in view of the above points, and consists of a rotation transmission/disconnection system consisting of a driving rotor and a slider on a working part input shaft which is drivingly connected to a prime mover so as to be variable in speed in an endless band. The present invention provides a power transmission device for an agricultural machine that has a simple structure and prevents straw debris from getting caught in the structure by providing a clutch for use in the agricultural machinery.

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 4 show examples in which the power transmission device according to the present invention is used to drive the reaping section of a combine harvester, and FIG. 1 shows a part of the reaping section, threshing section, and running section of a combine harvester in which the power transmission device according to the present invention is implemented. 2 is a side view of the power transmission device,
Figure 3 is an enlarged plan view of A in Figure 2, and Figure 4 is B in Figure 3.
'B is a sectional view. In the figure, the rollers 1 running left and right
A threshing frame 3 for the threshing section is mounted on the running frame 2 that connects the wheels 9, and in front of it on the right side in the direction of movement is a driver's seat 4, a side clutch lever 5°, a gear shift lever 6, and An operation box B is provided with various operation levers such as a reaping latch lever 7. Further, on the running frame 2, an engine 9 as a prime mover is mounted in front of the threshing machine 3, and further in front of the engine 9, a reaping bearing 10 is installed upright with its base end fixed to the running frame 2. has been done. A gearbox 11 formed in the shape of a rectangular box is rotatably supported at the upper end of the reaping bearing 10, and a pipe-shaped reaping frame 12 extending diagonally downward is integrally fixed to the lower end of the gearbox 11. ing.

The reaping unit, which is indicated by the reference numeral 13 as a whole, is supported by this reaping frame 12, and includes a cutting body 14 that scrapes the rows of culms in the field as the machine advances, a lifting device 15 that raises up the fallen culms, It is equipped with a clipper-like cutting blade 16 for cutting the root part of the erected shell culm, a scraping device 17 for scraping the cut shell culm into the conveyance path, and the like. A support rod 18 projects diagonally upward from the other end of the gearbox 11 (not shown in FIG. The proximal end portion of the root conveyance device 20 to be conveyed is supported. By expanding and contracting the piston rod of a hydraulic cylinder (not shown) connected to the reaping frame 12 and the traveling frame 2 by operation from the operator's seat 4, the entire reaping section 13 is connected to the reaping frame 12 and the gear box 11. The mowing height is adjusted by integrally swinging around a pivot provided by a reaping bearing 10.

Next, a power transmission device for the reaping section 13 will be explained. In the gearbox 11, a pulley shaft 21, which serves as a working part input shaft, is supported via a ball bearing 22 and whose movement in the axial direction is restricted. A variable speed driven pulley as shown is provided. That is, a fixed disk 24 is fixed to the tip of the pulley shaft 21 with a nut 25.
A movable disk 2 is attached to the square chamfered portion following the tip step portion of 1.
6 is slidably fitted so as to move forward and backward relative to the fixed disk 24. A V-shaped belt contact surface is formed on the opposing surfaces of both disks 24°260, and an endless belt 2 is formed between the driving pulley 27 of the engine 9 and this belt contact surface.
8 is hung. Reference numeral 29 denotes a moving cam that constitutes a variable speed cam mechanism together with a fixed cam 30 that is a shaft support of the gear box 11 of the reaping frame 10, and includes a ball bearing 31 fixed to the moving disk 26.
It is fixed to the outer ring of the endless band 28 and is biased toward the fixed cam 30 by sliding of the movable disk 26 under the tension of the endless band 28. On the other hand, the speed change lever 6 is connected to the speed change device of the running section via a rod 32, and is also connected to a shaft 33 protruding from the moving cam 29 by a connecting rod 34. The moving cam 29 is configured to rotate in conjunction with the speed change operation of the traveling section by rotating the lever 6. An inclined cam surface is formed on the facing surfaces of both cams 29 and 30, and by rotating the movable cam 29, the movable disk 26 is moved by the tension of the endless band 28 or by the action of this cam surface. configured to slide against n
ing. As the moving disk 26 slides, the working diameter of the endless band 28 relative to the variable speed driven pulley 23 changes, so that the rotation speed of the pulley shaft 21 is changed. A tension arm 36 formed in a dogleg shape is pivotally attached to an arm 35 protruding from the fixed cam 30, and a tension pulley 37 pivotally attached to one free end of the tension arm 36 is attached to the inner side of the endless band 2B. attached to. Further, between the other free end of the tension arm 36 and the free end of the movable cam 290, a tension pulley 37 applies a rotational force to the tension arm 36 in the direction of tensioning the endless band 28. A tension spring 38 is tensioned.

A bevel gear 39 as a driving rotating body is rotatably fitted to the pulley shaft 21 within the gear box 11, and a transmission shaft 40 is rotatably supported by penetrating the reaping frame 12. A bevel gear 41 that meshes with the bevel gear 39 is pivotally attached to the. Furthermore, a slider 43 that constitutes a rotation transmission/disconnection clutch 42 together with a bevel gear 39 is slidably fitted into an angular chamfered portion of the pulley shaft 21 that is formed next to the stepped portion on the outer end side of the gear box 11. A compression coil spring 44 is interposed between the slider 43 and the bevel gear 39 to urge them apart. Further, a cone-shaped clutch surface is formed on the facing surfaces of the slider 43 and the bevel gear 39, and rotation is transmitted by contacting each other. One end of a shifter 45 pivotally connected to the gear box 11 is engaged in an annular groove formed on the curved surface of the slider 43, and the other end of the shifter 45 and the reaping latch lever 7 are in a circular groove. The arc-shaped OV lever 6 and the wire 47 are connected to each other.

By doing this, when the reaping latch lever T is rotated, the slider 43 slides via the lever 46, the wire 47, and the shifter 45 by the elastic force of the compression coil spring 44 or the force that resists this. , the rotational transmission between the pulley shaft 21 and the transmission shaft 40, that is, the drive of the reaping section 13, is connected and disconnected.

The operation of the combine harvester and power transmission device configured as above will be explained. When the machine is stopped, the shift lever 6 is in the neutral position, the reaping latch lever γ is in the position shown in FIG. 2, and the shift latch 42 is moved as shown in FIG. 4 by the elastic force of the compression coil spring 44. The clutch surfaces separate and rotation transmission is cut off. After starting the engine 9, the latch (not shown) for running is engaged, and the gear change lever 6 is rotated to a desired position.The roller 1, which runs via the rod 32 and the transmission (not shown), rotates, causing the machine to run. .

At this time, the rotation of the driving pulley 21 is transmitted to the variable speed driven pulley 23 by the endless band 28, and the pulley shaft 21 rotates. Therefore, when the reaping latch lever 7 is rotated counterclockwise from the position shown in FIG. Since it is moved toward the bevel gear 39 side, the clutch surfaces are pressed against each other and the rotation of the pulley shaft 21 is transmitted to the transmission shaft 40 via the bevel gears 39 and 41.

Therefore, each device of the reaping section 13 is driven to perform the harvesting operation.

During harvesting, for example, when the speed change lever 6 is rotated counterclockwise from the position shown in FIG. It rotates counterclockwise in FIG. 2 and moves in a direction approaching the fixed cam 30 by the action of the cam surface provided between it and the fixed cam 30. Therefore, moving cam 2
The movable disk 26 integrated with the variable speed driven pulley 23 moves away from the fixed disk 24, and the endless band 2B moves from the large diameter portion of the variable speed driven pulley 23 to the small diameter portion, thereby reducing the working diameter of the reaping portion 13. The rotation speed is increased in proportion to the traveling speed. At this time, in FIG. 2, the endless band 28, which had a Y-linear shape on the side to which the tension boob 1j 37 is attached, bends into a dogleg shape due to the loosening of the tension, but the tension/gooey 37 bends the tension spring 38 Since it is pressed against the endless band 28 side by the tension deer,
The tension of the endless band 28 is ensured.

Furthermore, if only the reaping section 13 is to be stopped while traveling, the reaping shift clutch lever 7 can be rotated to the position shown in FIG. 4, and the wire 47 will be loosened and the shifter 45 can be rotated. The bevel gear 3 is activated by the elastic force of the coil spring 44.
9, the clutch 42 is disengaged, and the rotation of the reaping section 13 is stopped.

Although this embodiment shows an example in which the present invention is applied to power transmission to the reaping section of a combine harvester, the working section is not limited to the reaping section, but may also be a threshing section, a binding section of a binder, or a binding section of a binder. The same method can be applied to the tilling section of a tiller.

Further, in this embodiment, an example was shown in which the speed change of the working part was linked to the speed changing operation of the traveling part, but it is also possible to actually boil the work part in which the speed change of the working part is performed by an independent speed change lever.

As is clear from the above description, according to the present invention, the pulley shaft 21 as the input shaft of the cropping section is drivingly connected to the driving side by the endless belt 28 in a variable speed manner in the power transmission device of the agricultural machine. The structure is extremely simple because there is no need to provide an intermediate shaft or an intermediate pulley for the clutch because the clutch 42 for connecting and disengaging the rotational transmission, which is made up of a bevel gear 39 as a driving rotating body and a slider 43, is provided. The power transmission part can be made small and compact, and
Since there is no intermediate gooey, etc. where straw waste etc. can easily get caught, the operation of the row cutting section is carried out smoothly.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the power transmission device according to the present invention, and Figure 1 shows a part of the reaping section, threshing section, and running section of a combine harvester in which this is implemented. Figure 2 is a side view of the power transmission device, Figure 3 is A of Figure 2.
The enlarged plan view, FIG. 4, is the BB section (■) of FIG. 3. 9...Life/Engine, 21...Boo 9 axis, 23...
・・Speed driven pulley, 28・・Endless band, 39・・Fist/bevel gear, 42φ・・Revolution transmission clutch,
43...Slider. Patent applicant: Iseki Agricultural Machinery Co., Ltd. Agent: Kazuo Yamakawa (eυ11 people) Figure 1 Figure 2

Claims (1)

[Claims] Power transmission for an agricultural machine, characterized in that a rotation transmission connection/disconnection clutch consisting of a drive rotor and a slider is provided on a working part input shaft which is drivingly connected to a prime mover so as to be variable in speed in an endless band. Device.