JPS5850823Y2 - combine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a combine harvester in which a cutting device is equipped with a cutting height adjustment sensor to automatically adjust the cutting height.

Conventionally, a reaping device for a combine harvester is equipped with a cutting height adjustment sensor having a grounding piece, and the cutting height of the culm is adjusted by operating the grounding piece in this sensor.

In the sensor, the sensor box is fixed to the reaping frame of the reaping device, the grounding piece is swingably supported on the sensor box, and the tip of the grounding piece is biased so as to be in contact with the ground.

When the ground is uneven, the grounding piece swings to follow the unevenness, and the unevenness is detected by the action of a sensor caused by the swinging of the grounding piece, and the reaping device is connected to a reaping device using, for example, a hydraulic cylinder. It works as if the entire machine were raised and lowered to adjust the cutting height.

However, in the past, since the sensor was fixed to the reaping frame, the height from the ground of the pivot portion of the grounding piece to the sensor box was determined by the height from the ground of the reaping frame, and the cutting height was It was not possible to change the adjustment.

Therefore, the reference cutting height of the culm cannot be set to an appropriate value, and even if the sensor is operating normally, there is a problem in that the cutting cannot be done at an appropriate cutting height.

On the other hand, it has been proposed that a mowing height adjustment sensor is not fixed to the mowing frame but is supported on the mowing frame via a parallel link so that its vertical position can be adjusted (Japanese Utility Model Application No. 132826/1983).

However, according to the invention of this prior application, a mowing height adjustment wire is attached to the intermediate position of one of the link members in the parallel link, and the sensor is supported in a suspended state by this wire. There is no restriction on upward rotation, so when the grounding piece swings along the unevenness of the ground surface, if a force is applied that pushes the sensor upward, the sensor itself will also rise. However, there was a problem in that the action of the grounding piece was inaccurate.

An object of the present invention is to enable a mowing height adjustment sensor equipped with a grounding piece to be adjustable vertically relative to a stationary member on the machine side, so that the standard cutting of the culm can be adjusted regardless of the height of the stationary member from the ground. can be set to an appropriate value, and the sensor can be fixed at the adjusted position, so that the adjusted position of the sensor does not fluctuate due to the operation of the grounding piece, and mowing can always be performed at an appropriate reference cutting height. It is something.

The structure of the present invention is such that a mowing height adjustment sensor equipped with a grounding piece is supported by two parallel links and is forced to move vertically in parallel, and a projecting piece is protruded from one of the links. Attach the other end of the operating wire, one end of which is connected to the operating section, to the protruding piece, and pull the wire to force the sensor to move upward, while also increasing the distance between the protruding piece and the stationary member. By interposing a spring that opposes the pulling direction of the wire and urges the sensor in the grounding direction, after the sensor is set at a certain height, the grounding piece is not pivoted to the sensor. This was done to ensure that the height of the branch above the ground was always constant.

The details of the present invention will be explained below based on the embodiments shown in the drawings.

First of all, FIG. 1 schematically shows a reaping device at the front of a combine. It is supported by the rear combine harvester main body (not shown) so as to be able to move up and down.

In the figure, 5 is a sensor for adjusting the cutting height provided in the reaping device 1, and the sensor 5 is swingably equipped with a grounding piece 6 that protrudes downward. When it touches the ground and swings, the sensor 5 sends a signal to move the reaping device 1 up and down, thereby constantly reaping the culm at a constant height.

Therefore, in the present invention, the sensor 5 is attached to the reaping device 1 in the following manner.

That is, as shown in FIGS. 1 and 2, a mounting plate 7 is vertically mounted on one rod 2 of the reaping device 1, and on the top and bottom of this mounting plate 7, a letter-shaped link 9 with a protruding piece 8 at one end and an elongated link 9 are formed. The link 10 has a pivot point 11, the link 9 has an intermediate part between it and the projecting piece 8, and the other link 10 has one end part thereof as a pivot support 11.
, 12 are rotatably attached, and connecting plates 13 are pivotally supported 14, 15 at the other ends of both links 9, 10 so that the links 9, 10 are parallel to each other. Each link 9.10 and said mounting plate 7 and connecting plate 13
to form a four-point link, and the projecting piece 8 of the link 9
By swinging, each link 9, 10 is moved in parallel.

Then, a cylindrical joint 16 is interposed on the connecting plate 13 and a supporting plate 17 is attached with bolts 18, and the sensor 5 described above is fixed to the supporting plate 17, and the link 9,
The movement of 10 causes the sensor 5 to move up and down in parallel.

Further, a wire 19 leading to the control section of the combine is attached to the tip of the protruding piece 8 of the link 9, and a spring 20 is stretched between the protruding piece 8 and the rod 2 on the opposite side to the wire 19. 19 spring 2
0, the links 9 and 10 are moved in parallel to move the sensor 5 upward, and when the tension on the wire 19 is released, the spring 20 moves each link 9 and 10 in parallel. It is designed to move the sensor 5 downward.

When the combine harvester described above is operated, the grounding piece 6 of the sensor 5 is grounded on the field, and when the field is uneven, the grounding piece 6 swings, causing the grounding piece 6 to swing. The sensor 5 detects the movement and automatically adjusts the height of the reaping device 1 up and down, so that the height of cutting of the culm by the device 1 is always constant.

By the way, when it is desired to change or adjust the mowing height of the culm by the reaping device 1 during the work traveling, that is, the mowing height setting value of the sensor 5, the wire 19 is pulled or loosened from the control section of the combine harvester.

In this case, when pulling the wire 19, the projecting piece 8
rotates, thereby causing both links 9 and 10 to move upward in parallel, and the sensor 5 and its grounding piece 6 are placed in an upwardly moving position in a parallel state.

Further, when the wire 19 is loosened, the protrusion 8 is rotated by the spring 20 in the opposite direction, and both links 9 and 10 are moved downward, causing the sensor 5 and its grounding piece 6 to move downward. are moved downward in a parallel state.

As explained above, in the present invention, the mowing height adjustment sensor is supported by a stationary member so as to be movable up and down via two parallel links, so the set height of the sensor can be adjusted arbitrarily, and the mowing height adjustment sensor This made it possible to freely change and adjust the cutting height of the culm.

Moreover, in the present invention, the mowing height adjusting wire is supported by a stationary member so as to be movable up and down via two parallel links, and the operating wire is attached to the protruding piece of one link, and the wire is attached to the protruding piece and the stationary member. Since a spring is interposed between the wire and the spring that opposes the pulling direction of the wire and urges the sensor in the grounding direction, the tension force acting on the wire is generated between the pivot points of the link having the protruding piece. The force exerted by the spring in the direction of contact with the ground acts in opposite directions to hold the link in a fixed state, so that the sensor is reliably at the adjusted position adjusted by the swinging of the link. This is because the grounding piece can be fixed, and after the sensor is fixed, the pivoting portion of the grounding piece to the sensor can always maintain a constant height, and the grounding piece rotates around this pivoting portion. Therefore, it is possible to always ensure that the sensor operates accurately, and the culm cutting height can always be kept constant.

Moreover, the spring is attached in the direction in which the sensor is in contact with the ground.
By interposing the sensor in a force-like manner, especially when the wire is used to move the sensor downward, the spring exerts a force that acts on the sensor in the direction of contact with the ground, so that the sensor can be accurately moved downward to a predetermined position. You get it.

In addition, in the present invention, the movement of the sensor can be easily adjusted by operating the link from the control section of the combine via a wire, and when the combine is running backwards, the sensor can be moved upward by the operation. By doing so, damage to the sensor and grounding piece can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a reaping device portion of a combine harvester according to the present invention, and FIG. 2 is a plan view of the main part thereof. 2... Stationary member (rod), 5... Sensor, 6... Grounding piece, 9.10... Link, 8... Projection piece, 19...wire, 20...spring.

Claims (1)

[Scope of utility model registration request] A mowing height adjustment sensor equipped with a grounding piece is supported by a stationary member on the machine side via two mutually parallel links, and the sensor is configured to move in parallel in the vertical direction. , protruding a protrusion, attaching the other end of the operating wire whose one end is connected to the operating section to the protrusion, and pulling the wire to force the sensor to move upward; A combine harvester characterized in that a spring is interposed between the stationary member and the spring that opposes the pulling direction of the wire and urges the sensor in the direction of contact with the ground.