JPH0130986Y2 - - Google Patents

Description

[Detailed description of the invention] This invention mechanically links an electromagnetic solenoid that is automatically operated based on information from a sensor that detects the height of the reaping section above the ground and a control valve that raises and lowers the reaping section. The present invention relates to an operation structure for a combine harvester, in which the control valve and the manual operating tool are interlocked and connected by a mechanical interlocking mechanism having a flexible part to prevent the operating tool from being displaced regardless of the operation of the solenoid.

The above-mentioned combine harvester is designed so that the cutting height is automatically adjusted within a set range, and the reaping section can be manually raised and lowered regardless of information from the sensor in order to turn the machine, etc. This is designed to prevent dangers such as the manual operating tool moving in conjunction with the elevation of the reaping section and hitting the operator, but conventionally, during automatic control or manual operation, the control valve did not reach the end of its stroke. In order to prevent the solenoid from being damaged due to shock operation up to the end of its stroke, a stopper for this purpose is applied to the control valve, and the valve element is prevented from being damaged due to contact with the stopper. By configuring an interlocking mechanism between the solenoid and the control valve so that the control valve does not reach the stroke end even when During manual operation, the operating tool was operated with an impact, and the solenoid was operated with an impact to the end of its stroke, resulting in damage.

An object of the present invention is to prevent damage to the control valve while also preventing damage to the solenoid.

The characteristic configuration of the present invention is that, in the above-mentioned operation structure of the combine harvester, the stopper that regulates the stroke of the control valve acts on the interlocking device between the solenoid and the control valve, and its operation and effects are as follows. That's right.

That is, by causing the stopper to act on the interlocking tool, the stroke is regulated so that the control valve is not operated to the end of its stroke while preventing the valve body from colliding with the stopper both during automatic control and during manual operation.
The stroke is regulated so that the solenoid is not operated to the stroke end during manual operation. Therefore, damage to the control valve can be prevented as before, and furthermore, it is now possible to prevent the solenoid from being damaged due to impactful operation to the end of its stroke.

Incidentally, as a means of regulating the stroke of the control valve while preventing damage to the solenoid, it is possible to have a stopper act directly on the solenoid, but in this case, since the stroke of the solenoid is generally relatively small,
In order to regulate the stroke to a predetermined amount, the position of the stopper must be set with extremely high precision, which is accompanied by the problem that it becomes difficult to install and set the stopper.
However, as in the present invention, when the stopper is applied to the interlocking device, it can be applied to the interlocking device that expands the solenoid stroke, so it is easy to set the stopper position for regulating the stroke to a predetermined amount. This also solved the above-mentioned problem regarding the stopper attachment setting.

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

As shown in FIG. 1, at the front of a crawler-type traveling body having a driving section 1, a threshing section 2, etc., a lifting device 3 and a reaping device 4 for the planted grain culm are installed.
A combine harvester is constructed by connecting a reaping section 6 consisting of a conveying device 5 for supplying reaped grain culms to a threshing feed chain 2a.

The reaping section 6 is constructed so that it can be vertically swung around an axis P with respect to the traveling machine body by a hydraulic cylinder 7, and the control valve 8 of the cylinder 7 is connected to a support shaft 9 as shown in FIG. The first interlocking tool 10 is attached to the support shaft 9 so as to be swingable back and forth. A balance spring 12 is provided so that the force required to operate the control valve 8 to the upward side of the second interlocking device 11 and the force required to operate the second interlocking device 11 to the downward side are almost equal regardless of the weight of the device 11. Through the first mechanical interlocking mechanism 13 having
It is connected to an electromagnetic solenoid 14 so that the control valve 8 is switched by turning on and off the solenoid 14 to adjust the cutting height. As shown in FIGS. 2 to 4, an ultrasonic sensor 15 for detecting the height of the cutting section 6 above the ground is attached to the support rod 17 of the weeding tool 16, and the operating mechanism 1 of the solenoid 14 is
8 to output the detection results, and the solenoid 14 is configured to be automatically turned on and off based on information from the sensor 15 so that the height of the reaping section 6 above the ground is within a set range. This allows work to be done while automatically adjusting the cutting height to remain approximately constant regardless of pitching of the machine.

In addition, the dividing rods 19 and 2 shown in Figures 2 to 4
0 is for pushing grain culms and the like out of the sound wave passage so as not to interfere with the transmission or reception of sound waves.

As shown in FIG. 4, a second mechanical interlocking mechanism 22 consisting of the first mechanical interlocking mechanism 13 and a push/pull rod 21 connects the human operating tool 23 to the control valve 8 as a support for the operating section 1. axis 24
The push/pull rod 21 is connected to the second interlocking tool 11 by a long hole 25, which is an example of a flexible part that is swingably attached to the lever and prevents the operating tool 23 from being displaced regardless of the operation of the solenoid 14. A spring 26 is provided at the pivot portion of the operating tool for restoring or maintaining the operating tool 23 at approximately the center of the neutral region N. The switch 27 for detecting the operating position of the operating tool 23 is connected to the push/pull rod 21.
A pair of switch operating pieces 28a, 28b attached to the switch are linked to detect based on the positions of these operating pieces 28a, 28b, and the solenoid operating mechanism 18 is linked to automatically operate the operating tool. 23 is in the neutral region N, the operating mechanism 1
8 is automatically operated to operate the solenoid 14 based on information from the sensor 15, and the operating tool 23 is placed in the ascending operating position UP or descending operating position.
When in DN, the operating mechanism 18 is configured to automatically switch to a non-operating state in which operation of the solenoid 14 is stopped regardless of information from the sensor 15,
The reaping section 6 can be manually raised and lowered by giving priority to information from the sensor 15, and
When the operating tool 23 is placed in the neutral range N, the automatic control is automatically turned on, and the operating tool 23 is configured to be stopped and maintained at approximately the center of the neutral range N when the reaping section 6 is automatically controlled. .

As shown in FIG. 4, a pair of stoppers 29a and 29b that restrict the stroke of the control valve 8 so that the spool is not operated to the stroke end provided on the valve itself are actuated on a support 30 fixed to the machine body. The second interlocking tool 11 is screwed so that the position can be adjusted, and also serves as a stopper for regulating the stroke so that the movable piece of the solenoid 14 is not operated to the stroke end provided in the solenoid itself.
The control valve 8 and the solenoid 14 are designed to prevent damage to the control valve 8 and the solenoid 14.

[Brief explanation of drawings]

The drawings show an embodiment of the operating structure of the combine harvester according to the present invention, and FIG. 1 is a side view of the combine, and FIG. 2 is a side view of the combine harvester.
The figure is a plan view of the sensor installation section, FIG. 3 is a front view of the sensor installation section, and FIG. 4 is an operation system diagram of the reaping section. 6... Reaping section, 8... Control valve, 1
DESCRIPTION OF SYMBOLS 1... Interlocking tool, 14... Solenoid, 15... Sensor, 22... Mechanical interlocking mechanism, 23... Human operation tool, 25... Flexible part, 29a, 29b... Stopper.

Claims (1)

[Scope of utility model registration request] An electromagnetic solenoid 14 that is automatically operated based on information from a sensor 15 that detects the height of the reaping section 6 above the ground is mechanically connected to a control valve 8 that raises and lowers the reaping section 6. 8 and a human operating tool 23 are interlocked and connected by a mechanical interlocking mechanism 22 having a flexible part 25 to prevent the operating tool 23 from being displaced regardless of the operation of the solenoid 14. and stoppers 29a, 2 for regulating the stroke of the control valve 8.
9b is made to act on the interlocking tool 11 of the solenoid 14 and the control valve 8.