JPS6041068Y2 - Reaper cutting height control mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a mowing height control sensor that is movable up and down relative to the reaping device and is biased downward so as to maintain the vertical position relative to the reaping device within a set range. The raising operation state of the drive mechanism that raises and lowers the reaping device is linked to the elastically biased operating section via a mechanical linkage mechanism so that it can be operated automatically, and the operating section is not manually operated. Regarding the cutting height control mechanism of the reaper that is linked to the operating tools for the
The purpose is to allow manual operations to be performed easily with a small amount of operating force.

More specifically, the above-mentioned cutting height control mechanism is designed to maintain a constant cutting height regardless of pitching of the machine or fluctuations in the amount of sinking into the mud. Conventionally, when operating the operating part with the operating tool, the sensor is also raised against the downward biasing force, so that when operating the operating tool, the sensor is raised and lowered. had the disadvantage of requiring a large amount of operating force.

In other words, the force that biases the sensor downward allows the operation unit to be properly operated against the force that biases it, and
The force is set to a large enough force to keep the sensor in proper contact with the ground, stump, etc., so if the sensor is lifted up during manual operation, it will require a large operating force, so it is not recommended. The idea is to solve these problems.

The cutting height control mechanism for a reaper according to the present invention has a government-registered structure, and includes the sensor and the sensor in the linkage mechanism so that the operating section can be operated by the operating tool without lifting the sensor. The device is characterized in that it is provided with an elastic flexibility mechanism that allows a change in the state of connection with the operating section.

That is, an elastic flexibility mechanism is provided in the linkage mechanism to allow a change in the state of linkage between the sensor and the operating section, so that the operating section can be operated by the operating tool without lifting the sensor. Because of this structure, the operating tool can be easily operated with a small operating force.

As a result, a cutting height control mechanism for a reaper that can be used more conveniently has been achieved.

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

As shown in FIG. 1, a crawler traveling device 1, a threshing device 2
, a device 4 for pulling up the stem culm, a clipper-type cutting blade 5 for cutting the base of the pulled stem culm, and an assistant for conveying the cut stem culm to the rear and merging it at the front of the vehicle body equipped with a driver's seat 3, etc. transport device 6a,
6b, a reaping processing section consisting of a rear conveyance device 7 for conveying the merged stem culms toward the threshing device 2 is provided;
As the machine advances, it is designed to automatically and continuously perform tasks such as harvesting the stalks planted in the field, followed by threshing.

Note that this combine harvester is normally set to perform circular mowing work with the already cut area located on the right side of the machine body.

The support frame 8 of the reaping processing unit is pivotally supported to the vehicle body by a hydraulic cylinder 9 so as to be swingable around the horizontal axis X, and as shown in FIGS. With respect to the horizontal shaft 10 provided on the right side of the blade 5 and supported by the frame 8, a pair of grounding surfaces are arranged side by side with a horizontal interval larger than the plant diameter of the target stem culm and smaller than the planting interval. Spring 12a, 12b is provided which pivots the front ends of the rod-like bodies 11a, llb so as to be able to swing up and down about the axis Y, and biases the rod-like bodies 11a, llb downward, respectively.

Furthermore, a wire 15 extending from the swing operating arm 14 of the control valve 13 that switches the operating state of the hydraulic cylinder 9 is connected to both the rod-like bodies 11a.

The swing operating arm 14 is connected to the tongue pieces 16a and 16b attached to each of the arms 11b by a pin 18 through elongated holes 17a and 17b extending in the vertical direction to provide flexibility for relative movement in the vertical direction. , spring 1
At step 9, the hydraulic cylinder 9 is extended and biased toward a lifting operation to raise the reaping processing section.

When the vertical positions of the rod-shaped bodies 11a and llb relative to the cutting blade are both within the set range, or when the height of one of them is within the set range and the other is on the way up from the set range, the control valve 13 is activated. The rod-shaped body 11a is in a neutral state in which the operation of the hydraulic cylinder 9 is stopped.

When both the upper and lower positions of the mower 11b relative to the cutting blade rise too far out of the set range, the control valve 13 is brought into a state in which the hydraulic cylinder 9 is extended and the reaping processing unit is raised;
When the vertical position of at least one of the rod-like bodies 11a and 11b relative to the cutting blade falls below the set range, the control valve 13 is actuated to shorten the hydraulic cylinder 9,
arranging to switch the reaping processing section to a lowering state,
Thus, the height of the cutting blade 5 relative to the ground is automatically maintained at a set height, thereby stabilizing the cutting height.

In short, the height of the cutting blade 5 above the ground is detected by the rod-like bodies 11a and llb, and the cutting processing section is automatically raised and lowered to stabilize the cutting height regardless of pitching of the vehicle body. , and prevents the reaping unit from rising even if one of the pair of rod-shaped bodies 11a, llb rides on foreign objects such as straw waste, uncut stem culms, stumps, etc. and deviates from the setting range. This is to prevent malfunctions caused by foreign objects.

Also, a manual operation tool 21 for locking and moving the swinging operation arm 14, which is biased toward the lowering operation by the sensors 11a and llb, toward the upper operation using the locking pin 20.
By switching the lever 21 to the raised position U1, the raising/lowering stop position N1, and the lowering position, the reaping processing section can be arbitrarily raised or lowered, and furthermore, by switching the lever 21 to the automatic position A, The pin 20 is moved to a position where it does not come into contact with the arm 14, and both rod-shaped bodies 11 are removed.
The system is designed to automatically raise and lower the reaping processing section based on the information of a and llb.

In the figure, 23 and 23 are springs that urge the operation tool 21 to return to the lifting stop position N, and 25 is the outer wire end of the wire 15 and the spring 12.
This is a fixed bracket for supporting a and 12b.

The swing operating arm 1 is inserted between the swing operating arm 14 and the wire 15 against the biasing force of a spring 19 that urges the swing operating arm 14 toward the upward operating state.
4 can be pulled and swung, and both the rod-shaped bodies 11a
, llb is provided with a spring 22 set to such a strength that it cannot be raised against the downward biasing force of the spring 22, so that the operation of the swinging operation arm 14 by the operation tool 21 is controlled by the rod-shaped bodies 11a and llb. It is designed so that it can be easily operated with a small amount of operating force without requiring any lifting operation.

In the embodiment, the pair of grounding rods 11a and 11b are used as sensors for controlling the cutting height, but a single grounding body or stump contacting body may be provided.

Further, in the embodiment, the reaping processing unit is raised and lowered to raise and lower the cutting blade 5 as the reaping device based on the information of the sensors 11a and 11a, but it is possible to raise and lower at least only the reaping device 5. It is.

Further, in the embodiment, the hydraulic cylinder 9 is used as an example of the drive mechanism, and the swing operation arm 14 for operating the valve is used as an example of the operation section, but other configurations may be used, such as a combination of an electric motor and its switch operation mechanism. It may also be carried out.

Further, in the embodiment, the wire 15 is used to constitute the mechanical linkage mechanism, but other configurations such as a linkage mechanism may be used.

Further, in the embodiment, the spring 22 is used as an example of the elastic accommodation mechanism, but other materials such as a plate spring may also be used.

Further, in the embodiment, the operating tool 21 is locked and linked to the operating part 14 so as to allow the operating tool 21 to move toward the lower operating state. Good too.

Further, the elastic flexibility mechanism 22 includes a sensor 11a,
The operation unit 14 may not be operated immediately upon the descent of the sensor 11a and llb (or the operation unit 14 may be operated by increasing the biasing force as the sensors 11a and llb descend).

Further, the present invention can be applied to reaping machines such as binders in addition to combine harvesters.

[Brief explanation of drawings]

The drawings show an embodiment of the cutting height control mechanism for a reaper according to the present invention, in which Fig. 1 is a side view of the front part of the combine, Fig. 2 is a diagram of the relationship between both rod-like bodies and the control valve, and Fig. 3 FIG. 3 is a partially cutaway plan view showing the mounting portion of the rod-shaped body. 5... Reaping device, 9... Drive device, l
la, 11b...sensor, 14...
Operating section, 21... Operating tool, 22... Elastic flexibility mechanism.

Claims (1)

[Scope of utility model registration request] The cutting height control sensors 11a, llb, which are provided to be movable up and down relative to the reaping device and biased downward, are arranged so that the vertical position relative to the reaping device is maintained within a set range.
is linked to the operating section 14 which is elastically biased during the raising operation state of the drive mechanism 9 for raising and lowering the reaping device 5 through a mechanical linkage mechanism so that it can be automatically operated. A cutting height control mechanism for a reaper in which an operating part 14 is linked with an operating tool 21 for human operation, the operating tool 21
The operation of the operation unit 14 by the sensors lla, l
The sensors 11a, llb and the operation section 14 are included in the linkage mechanism so that the lb can be raised without raising the lb.
A cutting height control mechanism for a reaper, characterized in that it is provided with an elastic accommodation mechanism 22 that allows a change in the state of coordination with the reaper.