JPH0413945Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a grain culm raking device in a reaping device such as a combine harvester.

<Conventional technology> In the conventional reaping device, the grain culm raking and conveying section has a
Two star foils that mesh with each other are arranged side by side in the left and right direction in a plan view, and by driving the star foils with a chain, the base of the grain culm is caught in the meshing part of the star foils and transported backwards. is widely used, and a sprocket is coaxially supported on at least one star wheel, and the sprocket is equipped with a cross-feeding chain in which plates with protrusions and flat plates without protrusions are alternately connected in the outer circumferential direction. There is also known a mechanism in which the grain culms are wrapped around the star foil, and the grain culms are transported laterally by a cross-feeding chain and collected at the meshing portion of the star foil.

<Problems to be solved by the invention> However, in the above mechanism, when the interlocking part of the star foil is viewed from above, the protruding plate of the cross-feeding chain that hooks and conveys the grain culm is connected to the mountain part of the star foil. (the position of the bite) or located so as to protrude into the trough (between the adjacent bites),
At the interlocking part of the star foil, the stock base of the grain culm that has been transported becomes bent, causing disturbances in the subsequent lifting and transport (transport to the threshing part), which causes poor threshing and falling grain culms. It was becoming.

<Means for Solving the Problems> The device of the present invention for solving the above-mentioned problems involves transporting grain culms by raking them into the meshing portions of two or more star foils 31 and 35. A sprocket 38 is provided on the axis of the star wheel 35, and a transverse feed chain 40 formed by connecting a plate 41 with a protrusion 41 having a protrusion 41a in the outer circumferential direction and a flat plate 42 having no protrusion 41a is wound around the sprocket 38. In the mechanism for rotating the star wheel 35 and the sprocket 38 together, the star wheel 35 and the sprocket 38 rotate together.
The teeth 35a and 38a of the star wheel 35 and the sprocket 38 are fitted concentrically so that the teeth overlap each other at the same position, and the horizontal feed chain 40 is connected so that its flat plate is always between the teeth of the star wheel 35. It is characterized by being wrapped around it so that it is positioned.

<Function> According to the present invention configured as described above, the teeth 35a of the star wheel 35 on the side of the raking device 24 connected to the cross-feeding chain 40, the teeth 38a of the sprocket 38, and the protrusion 41a of the cross-feeding chain 40 are On the star foil meshing side, they always overlap at the same angular position with respect to the axis, and the flat plate 42 is located in the valley part of the star foil 35, and the protrusion 41
Since a does not protrude, there is no bending of the grain culm at the star foil meshing portion when the grain culm is raked and conveyed, and the grain culm is always fed in a vertical or nearly vertical posture.

<Embodiment> An embodiment of the present invention will be described below in detail with reference to the drawings. Figures 2 and 3 show a front view and a side view of a combine harvester in which the present invention is implemented, and show the driver's seat 2 and the threshing section. A running section 4 is provided at the lower part of the machine base 1 having 3, and a pre-processing section 6 is provided in front of the running section 4 via a swinging frame 5 so as to be swingable up and down.

The frame 9 of the preprocessing section 6 stands up tilted forward from the drive shaft case 7 that is connected laterally to the tip of the swing frame 5, the plurality of divider frames 8 that protrude in front of the drive shaft case 7, and the drive shaft case 7. Drive shaft case 11 for lifting, said drive shaft case 11
and a raising case 12a, 12b which is connected and diagonally installed between the front end of the divider frame 8.
3 is attached.

The left and right lifting cases 12a and 12b receive drive input from the upper ends of the drive shaft cases 11 and 11, respectively, through gear transmission such as bevel gears, and the left lifting case 12a is connected to the right lifting case 12b.
The case 12c is inclined to the right so that the upper side approaches the case 12c, and a raised case 12c is provided in the lower half between the two cases. A middle divider 14 is provided between the middle lifting case 12c and the right side lifting case 12b, and each lifting claw 1
5 and 15 constitute a single raising passage.

In addition, another lifting path inclined to the right is formed between the left side surface of the center drawer case 12c and the opposing surface of the left side drawer case 12a, and an auxiliary drawer case is provided at the front left end of the center drawer case 12c in the orthogonal cross-sectional direction. 16 is provided via a bracket 22, and at the upper end of this auxiliary lifting case 16, a left side lifting case 12 is provided.
One end of a transmission case 18 containing a built-in bevel gear etc. is connected to the shaft of an input sprocket 17 at the upper end inside a, and is connected to the shaft of an input sprocket 19 inside the transmission case 18. Similarly, the lower end of the auxiliary lifting case 16 and the lower end of the middle lifting case 12c are connected by a transmission case 21 containing a built-in bevel gear, etc., and the driving force is transmitted from the auxiliary lifting case 16 to the middle lifting case 12c. This is the mechanism by which this is done.

Due to the above-described input structure, the middle raising case 16 does not need to receive drive input from the rear of the bottom inside the pre-processing section 6, and the mechanisms and functions of the raking device 24, grain culm raking guide 47, etc., which will be described later, are eliminated. There is no need to provide an input transmission section that interferes with the movement of plants, and there are also advantages such as less splitting of plants during horizontal cutting, etc. in which adjacent plants are harvested, and the subsequent transportation posture is stable.

A cutting blade device 23 is horizontally installed in the left-right direction at the lower rear of the pre-processing frame 8, a raking device 24 according to the present invention is installed above it, and a lifting and conveying device 25 is installed at the upper rear thereof. ing. The lifting and conveying device 25 takes over the grain culm received from the raking device 24 and lifts and conveys it toward the feed chain 26 which is the grain culm introduction section of the threshing section 3.

The scraping device 24 includes wheel shafts 27 and 28 that are tilted forward from the drive shaft case 7 side, and driven shafts 29 and 30 that are raised from the divider frame 8 side located outside of the wheel shafts 27 and 28.
A star foil 31 is integrally fitted to the lower stage of the one wheel shaft 28,
Pulleys 33 and 34 around which a scraping belt 32 is wound are fitted to the upper stage of the wheel shaft 28 and the driven shaft 30, and the star wheel 31 and the belt 32 are rotationally driven by the drive of the wheel shaft 28.

The other star foil 35 that meshes with the star foil 31 and rotates at the same time is fitted to the lower stage of the other wheel shaft 27 via a boss 36, and further above the star foil 35, the upper end of which meshes with the upper end of the boss 36. A sprocket 38 is attached via a boss 37 that is engaged with the sprocket. Also, the other driven shaft 29
An idler roller 39 is rotatably supported on the shaft, and a transverse feed chain 40 is wound laterally between the idler roller 39 and the sprocket 38.
The mechanism is such that it is laterally driven as the rotation of 5 occurs. The cross-feeding chain 40 has a structure in which plates 41 with protrusions 41 having protrusions 41a protruding to the outside of the chain for locking grain culms and flat plates 42 which are ordinary chain plates without such protrusions are connected alternately. It is. Then, as shown in FIGS. 1 and 2, the teeth 35a of the star wheel 35 and the sprocket 3
8, and the centers of both teeth 35a and 38a overlap at the same angular position with respect to the axis of the pulley shaft 27, and the protrusion 41a of the lateral feed chain 40 also has the same number as the sprocket. 38, the flat plate 42 is located above the center of the teeth 35a, 38a, and the flat plate 42 is located on the outer circumference of the sprocket 38.
At the outer periphery of 8, adjacent teeth 35a, 35a or teeth 3
It has a structure located between 8a and 38a (trough).

Further, on the upper and lower sides of the sprocket 38, circular anti-wrapping tools 44 having a diameter substantially the same as the diameter of the tip of the protrusion 41a of the chain 40 are installed concentrically with the sprocket 35 and attached to the bosses 36, 37. 45 to 47 are guides for guiding grain culms to the transverse feed chain 40 and star foils 31 and 35, respectively;
48 is a cover of the scraping device 24.

The grain culm raised in the raising cases 12a to 12c with the above configuration is cut by the cutting blade device 23, and the guides 45 and 4 are cut on the left side in front view.
6, and by the cross-feeding chain 40, and on the right side in front view, the scraping belt 32 and guide 47 scrape between the star wheels 35 and 31, respectively.
The grain is transferred to the lifting and conveying device 25 and sent to the threshing section 3. In the lifting and conveying device 25, the grain culm on the left side is brought to the center by the auxiliary conveying device 50 on the left side when viewed from the front, and the grain culm along with the other grain culms is transferred to the grain conveying chain 51.
Then, the tips are lifted up and conveyed by the tip conveying claws 52, respectively.

In the above-mentioned scraping conveyance path, the lateral feed chain 40
Grain culms, which are fed laterally by the guides 42 and 46, are reliably held in a focused state in the valleys of the star foils 35 at the meshing portions of the star foils 35 and 31, and are conveyed in a substantially vertical state without bending. The teeth 38a of the sprocket 38 and the protruding plate 41
The protrusion 41a is always the tooth (mountain) of the star foil 35.
Since the grain culm is located at this position, the grain culm will not be bent or the grain conveyance will be disturbed. Further, since the outer diameter of the wrapping preventer 44 is substantially the same as the rotation locus of the protrusion 41a, wrapping of the grain culm around the foil shaft 27 is also prevented, ensuring smooth raking and conveyance as a whole.

6 and 7 are a plan view and a side view of the cutting blade device 23. In this example, it has a clipper-shaped fixed blade (receiving blade) 55 and a movable blade (cutting blade) 56. The rear end of the knife bar 57 is connected to the knife bar 57 so as to be integrally driven.

58 is a head plate for moving the cutting blade 56 left and right, and a guide bar 59 is provided at the rear of the cutting blade 56 and is fixed to the receiving blade 55.
A receiving blade stand 60 is attached to the bottom surface of the cutting blade 5, and the receiving blade stand 60 is attached to the pretreatment frame to support the entire cutting blade device. At the center of the upper surface of the blade holder 61 attached to the guide bar 59 so as to press against the receiving blade 55 of the cutting blade 56, a part of a certain width is punched upward to form a raised cover part 62, and the inside thereof The (lower part) forms a lubrication space 63 in which the surface of the cutting blade 56 is exposed.

A nozzle 64 for lubrication opens forward in the lubrication space 63 from the rear side, and is supported by a receiving blade stand 60 by a stay 65. The nozzle 64 is connected to an oil supply pipe 66, and lubricating oil is injected from the upper surface of the cutting blade 56 through the nozzle 64 while the cutting blade is being driven. Oil grooves 67 are carved on the upper surface and front and rear surfaces of the knife bar 57, and the lubricating oil supplied from the upper surface of the cutting blade during driving reaches the oil groove 67 through the troughs, and the oil grooves 67 are formed between the cutting blade 56 and the receiving blade 55. It has a mechanism that constantly provides lubrication to the sliding surfaces, prevents mud from adhering to the sliding surfaces and blades, and prevents rust.

8 and 9 show examples of the structure of the sorting air blowing section of the threshing section 3, and the receiving net 7 forming the lower part of the handling barrel chamber 70.
In the ventilation chamber 72 below the ventilation fan 73 is pivotally supported in the left and right direction.
The left and right vanes 73a, 73a at the lower center
Intake ports 74, 74, 75 for sucking outside air are provided between the
are provided for each. A guide plate 76 is attached to the outside of the lower intake port 75 along the outer wall of the ventilation chamber 72 so as to cover the intake port 75 and form an intake guide chamber 77, with its front end opening upward and its rear end opening upward. It opens backwards. With this mechanism, even if the fan 73 operates during threshing, the lower suction port 75
Straw waste, dirt, etc. picked up on the ground or by the running section 4 are not sucked into the interior, and straw wrapping around the fan shaft, deformation of the vane 73a, or entry of pebbles, dirt, etc. into the sorting blade is prevented. Ru.

<Effects of the invention> The present invention is constructed as described above, and the teeth of the star foil on the cross-feeding chain connecting side of the scraping device, the teeth of the sprocket, and the protrusions of the cross-feeding chain are always aligned with the axis on the star foil meshing side. They overlap at the same angular position, and the flat plate is located in the trough of the star foil so that the protrusion does not protrude. Therefore, when the grain culm is raked and conveyed, there is no bending posture of the grain culm at the star foil meshing part, and the grain culm is always vertical. Or sent in a nearly vertical position.

As a result, the grain culm is transferred smoothly to the lifting and conveying device, and there is no transportation disturbance in the lifting and conveying device.
This has the effect of preventing problems such as falling and poor threshing.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an enlarged plan view of the main parts of the present invention, and FIGS. 2 and 3 are a front view and an enlarged side view of the pre-processing part of a combine equipped with the apparatus of the present invention. Fig. 4 is an explanatory plan view showing the grain culm conveyance section of the pre-processing section, Fig. 5 is an enlarged cross-sectional view of the main parts of the device of the present invention, and Figs. 6 and 7 are a plan view and side cross-section of the cutting blade device. 8 and 9 are side and front cross-sectional views showing the structure of the blowing section of the threshing device. 31, 35...Star foil, 38...Sprocket, 35a, 38a...Teeth, 40...Transverse feed chain, 41...Plate with protrusion, 41a...Protrusion, 42...Flat plate.

Claims (1)

[Scope of utility model registration request] Grain culms are caught in the meshing portion of two or more star wheels 31 and 35 for transport, and a sprocket 38 is provided on the axis of the star wheel 35, and the sprocket 38 has a projection 41a in the outer circumferential direction. and a flat plate 4 without the protrusion 41a.
In the mechanism in which the star wheel 35 and the sprocket 38 are rotated together by winding the cross-feeding chain 40 formed by connecting the star wheel 35 and the sprocket 2, the star wheel 35 and the sprocket 38 have the same number of teeth 35a and 38a, and the teeth are in the same position. A grain culm raking device in which the cross-feeding chain 40 is wound around the star wheel 35 so that its flat plate is always positioned between the teeth of the star wheel 35, which are fitted concentrically so as to overlap each other.