JPS642591Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a handling depth adjustment device for a combine harvester.

In the case of a combine harvester in which a grain lifting chain is installed between the preprocessing section and the threshing section, the adjustment lever can be adjusted by manually moving the adjustment lever linked to the grain culm lifting chain. Generally, the handling depth is adjusted by moving the swinging side of the grain lifting chain by the amount of movement. When adjusting the handling depth by moving the end of the grain culm lifting chain in this way, the end of the grain culm lifting chain must be able to move at least 40 cm, otherwise short culms will be removed. There is a problem in that the treatment depth cannot be adjusted depending on the culm length from 1 to 3 long culms.

In addition, in the case where the grain culm lifting chain is manually adjusted using an adjustment lever, a complicated mechanism is used in the narrow part of the pretreatment device by using links, etc.
Furthermore, it is necessary to swing the heavy grain culm lifting chain lightly, but in the case of conventional handling depth adjustment devices using the grain culm lifting chain that is manually adjusted, the operating load of the adjustment lever is reduced. Even if a biasing elastic force such as a spring is used as an auxiliary means, there is still a drawback that the operating load of the adjustment lever cannot be reduced to a great extent.

The purpose of this invention is to solve the above-mentioned problems, and to configure the grain lifting chain into a handling depth adjustment device in which the swinging side of the other end can swing freely around one end that is pivoted to the machine body. Although the mechanism is simple, it is possible to secure an appropriate amount of movement of the starting end of the grain lifting chain by reducing the amount of movement of the operating part, and at the same time, it is possible to easily operate the adjustment lever. The present invention aims to provide a processing depth adjustment device for use in a machine.

The handling depth adjustment device of the combine harvester of the present invention, which achieves the above purpose, has a pair of grain culm lifting cases at the front of the machine that are tilted forward and backward, and a reaping blade is placed at the lower rear of the case, and a reaping blade is installed at the rear of the reaping blade. A grain culm lifting chain extending outward from the center of the machine body is provided between the grain culm lifting chain and the threshing part feed chain. The grain culm lifting chain is supported at the tip of an arm extending from its front end, and one end is connected to a pivot point of the grain culm lifting chain. The other end of the adjustment wire is fixed to the center of the aircraft from the outer part of the aircraft, and the middle part of the cough adjustment wire is connected to a roller that is pivoted to the end of the adjustment arm that can move up and down. It is characterized by being supported so that it can be moved up and down.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below with reference to embodiments shown in the drawings.

Figure 1 is a perspective view of a combine harvester equipped with the handling depth adjustment device of the present invention, Figure 2 is an enlarged perspective view of the adjustment lever that adjusts the handling depth, and Figure 3 is the main part of the handling depth adjustment device. FIG. 4 is a front view of the same.

In Fig. 1, 1 and 1 are the weeding bodies provided on both sides of the front of the aircraft, 2 is the central weeding rod provided between these weeding bodies 1 and 1, and 3 and 3 are a pair of grain culm triggers. The case is inclined in such a manner that the front is low and the rear is high, and a lifting claw 4 is installed inside the case, and the lifting claw 4 is designed to pull up the grain culm while moving from the bottom to the top. 5 is a reaping blade, which is attached to the lower part of the front of the machine. A grain culm lifting chain 6 extending outward from the center of the machine body is provided between these pre-processing parts and the threshing part 7 in the upper part of the machine body, and the grain culm lifting chain 6 is connected to the feed chain of the threshing part 7. It has a transmission fulcrum 6a below the starting end of 8, and this transmission fulcrum 6a
The tip of the grain culm lifting chain 6 swings up and down centering on the grain culm lifting chain 6 to adjust the handling depth of the grain culm harvested in the pretreatment section. A rail 9 is provided so as to be in contact with the upper side of the grain lifting chain 6, and is fixed via a U pipe 10.

An arm 11 extending from the end of the swinging side of the grain culm lifting chain 6 is extended toward the inside of the machine body, and one end of the extended arm 11 is connected to the lifting chain 6.
The other end of the adjustment wire 12, which is fixed to the body of the body at the center side of the body from the outside part of the body, which is the pivot point of the body, is connected to the body by a mounting pin 13. The intermediate portion of the adjusting wire 12 with its both ends connected is supported by a groove provided on the outer periphery of a roller 15 rotatably supported at the end of an adjusting arm 14 configured to be movable up and down.

Therefore, in the grain lifting chain 6 which rotates around the transmission fulcrum 6a at one end, the end side of the arm 11 extended via the roller 15 of the adjustment arm 14 that supports the middle part of the adjustment wire 12 is suspended. In this state, the extended arm 11 is rotated by operating the adjustment lever 19 located near the driver's seat 23 opposite to the transmission fulcrum 6a.
Since it is swung by the adjustment lever 19 integrated with the adjustment arm 14 with an arm ratio that is longer by the extension length of
By increasing the arm ratio, the weight of the grain culm lifting chain 6 itself, which occupies the arm ratio, is unevenly distributed on the pivot point side, and the operating load of the grain culm lifting chain 6 acting on the adjustment lever 19 is reduced. , the adjustment lever 19 can be operated easily. In addition, 16 is a running part.

2, 3 and 4 show that the adjusting arm 14 and the adjusting lever 1 are mounted on a frame 17 fixed to the fuselage with respect to a mounting shaft 18, as shown in further detail.
A roller 15 provided on the free end side of the adjustment arm 14 supports and guides the adjustment wire 12. The adjustment lever 19, which is attached to swing together with the adjustment arm 14, has its midway portion guided along a slide hole 20a carved in the guide plate 20, and is It is designed to be able to engage with a number of locking notches 20b provided on one side. The adjustment lever 19 is separated into two members, both of which are rotatably connected via a pivot 19a, and a contraction spring 21 is suspended between the two members. Therefore, the adjustment lever 19 resists the contraction force of the contraction spring 21 and moves into the slide hole 2.
It can be swung back and forth along 0a, and when the adjustment lever 19 is released, the contraction spring 21
The contracting force automatically engages one of the locking notches 20b. In addition, the adjustment lever 19
By extending a contraction spring 22 between the lever and the body, the adjustment lever 19 itself is auxiliary biased in the clockwise direction in FIG. 3. The adjustment lever 19 itself is biased in the clockwise direction, and the arm ratio of the grain culm lifting chain 6 to the adjustment lever 19 is lengthened by using the extension arm, which together make the grain culm lifting chain 6 longer. This reduces the operating load on the adjustment lever 19 when adjusting the swinging side of the lever 6. Adjustment lever 1 like this
It is preferable that the operating load of No. 9 is in the range of 3 to 5 kg.

A guide plate 20 for the adjustment lever 19 is located at the driver's seat 2.
3 and in front of the entrance 7a of the threshing section 7. Cover plates 24 and 25 are respectively provided on both sides of the guide plate 20 to cover the adjustment arm 14 so as not to obstruct movement of the grain culm.

In the above-mentioned apparatus, when the tip side of the grain lifting chain 6 is moved by a distance L from the solid line position to the chain line position as shown in FIG. Since the roller 15 is bent along the circumferential surface of the groove and connected to the body, the roller 15 only needs to move upward by L/2. Therefore, the adjustment arm 14
Also, the adjustment lever 19 can be moved directly by the adjustment wire 1 at the tip of the adjustment arm 14 without going through the roller 15.
This means that the amount of movement is 1/2 compared to when connecting two.

The above configuration has been further developed so that a plurality of rollers 15 are arranged at the tip of the adjustment arm 14, and correspondingly, a plurality of guide rollers are also provided on the body side, and adjustment wires 12 are connected to these rollers.
By alternately extending them in a zigzag pattern, the amount of movement of the adjustment arm 14 and the adjustment lever 19 can be further reduced by 1/2.

The grain lifting chain 6 of the above embodiment has a swinging fulcrum on the upper end side, and the handling depth is adjusted by swinging the lower end, but the present invention uses the lower end as the swinging fulcrum, It is also applicable to a type in which the handling depth is adjusted by swinging the upper end side.

In short, the handling depth adjustment device for a combine harvester according to the present invention tilts a pair of grain culm lifting cases 3, 3 at the front of the machine so that they are lower in the front and higher in the rear, and also has a cutting blade 5 at the rear and lower side. A grain culm lifting chain 6 extending outward from the center of the machine body is provided between the rear of the reaping blade 5 and the threshing part feed chain 8, and one end of the grain culm lifting chain 6 is connected to the machine body on the side of the threshing part feed chain 8. Rotatably supported on the outer part,
The other end is configured as a handling depth adjustment device that is vertically swingable, and one end is attached to the tip of the arm 11 extending from the grain culm lifting chain 6 or its front end, and one end is a pivoting part of the grain culm lifting chain 6. The other end of the adjustment wire 12 fixed to the center of the fuselage is connected to the outer part of the fuselage, and the intermediate part of the adjustment wire 12 is pivoted to the end of an adjustment arm 14 that is configured to be vertically movable. Since it is supported so as to be vertically movable via supported rollers 15, the lifting point of the grain culm lifting chain 6, that is, the connection point with the adjustment wire 12 is connected to the grain culm lifting chain 6.
It can be hung at a position as far as possible inward from the rotation fulcrum 6a of the machine, and the handling depth adjustment section can be placed close to the driver's seat 23, making it easy to operate and suitable for lifting the grain lifting chain 6. The operating distance of the adjustment arm 14 required is shortened, and the handling depth can be easily adjusted with a small lifting operation force.

Further, at the starting end of the grain lifting chain 6, an adjustment wire 12 is connected to an arm 11 extending toward the side where an adjustment arm 14 is present, and the connection point is connected to the roller 15 and the attachment base point of the wire 12 and the machine body. Since it is located in substantially the same plane as the locus plane in which the roller 15 moves when viewed from the front, there is no need to provide links for lifting and lowering in a narrow space around the grain culm lifting chain 6 in a complicated and unreasonable manner. In addition, since the adjustment wires 12 are stretched naturally in substantially the same vertical plane, it is difficult for the adjustment wires 12 to separate from the rollers 15 even if the adjustment arm 14 is moved up and down rapidly or due to excessive vibrations. It is.

Furthermore, since the handling depth adjustment device of the present application is configured with a simple mechanism, it is lightweight, does not generate noise due to vibration of the machine, and can be easily installed in a complicated and narrow area of the reaping device where various parts enter. It is particularly suitable as a handling depth adjustment device for small combine harvesters.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a combine harvester equipped with the handling depth adjustment device of the present invention, Figure 2 is an enlarged perspective view of the adjustment lever that adjusts the handling depth, and Figure 3 is the handling depth adjustment device of the present invention. FIG. 4 is a side view of the main parts of the same, and FIG. 4 is a front view of the same. 3...Grain culm lifting case, 6...Grain culm lifting chain, 11...Arm, 12...Adjustment wire, 14
... Adjustment arm, 15 ... Roller, 19 ... Adjustment lever, 20 ... Guide plate.

Claims (1)

[Scope of utility model registration request] At the front of the machine, a pair of grain culm lifting cases 3, 3 are tilted forward and backward, and a reaping blade 5 is installed at the rear and downward, and between the rear of the reaping blade 5 and the threshing section feed chain 8, there is a main body. A grain culm lifting chain 6 extending outward from the central part is provided, one end of which is rotatably supported on the outer part of the machine body on the side of the threshing section feed chain 8, and the other end is pivoted up and down. The grain culm lifting chain 6 is configured to be a swingable handling depth adjustment device, and the grain culm lifting chain 6 has an arm 11 extending from its front end, and one end thereof is a pivot point of the grain culm lifting chain 6. A roller 15 is connected to the other end of an adjustment wire 12 fixed to the body of the body closer to the center of the body than the outer part, and furthermore, the middle part of the adjustment wire 12 is pivoted to the end of an adjustment arm 14 configured to be movable up and down. A handling depth adjustment device for a combine harvester, characterized in that the device is supported so as to be vertically movable via the .