JPH0432915Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a handling depth sensor device for a combine harvester.

(Conventional technology) Combine harvesters have shallow handling depending on whether they are short culms or long culms.
A handling depth adjustment device is installed to prevent handling from too deep and to ensure that the handling depth is always appropriate regardless of changes in culm length. This handling depth adjustment device generally includes a sensor for controlling the handling depth during transportation from when the grain culm cut by the cutting blade is lifted and transferred to the feed chain of the threshing section. By sensing the culm body of the grain culm to be transported with a sensor and automatically changing the angle of the transport section, the position of the grain culm tip when being supplied to the threshing section is corrected to an appropriate position.

(Problems to be Solved) However, since most of the conventional sensors for controlling depth of handling are installed at a fixed position, the following problems have arisen. In other words, in a combine harvester that adopts the so-called harmony system in which the speed of the pre-processing conveyance section consisting of a pulling device, cutting blade section, grain culm conveyance device, etc. changes in conjunction with the vehicle speed, the conveyance posture of the grain culm depends on the progress of the machine. It is designed to maintain a constant conveying posture without disturbance even if the speed changes, but since the rotation speed of the feed chain in the threshing section is always constant, the vehicle speed is low (the speed of the pre-processing conveyance section is less than the speed), then
When the grain culm is transferred from the conveyance section to the feed chain, the stock side is pulled toward the feed chain faster than the ear side, and the force feed chain relatively holds the stock side of the grain culm, and the ear side is delayed and fed to the threshing section. (Situation A in Figure 4) and is treated lightly. On the other hand, when the vehicle speed is high (the speed of the pretreatment conveyance section is higher than the speed of the feed chain), the tip side takes the lead at the transfer section to the feed chain (the state shown in Figure 4 C), resulting in deep handling. It is something.

(Means for Solving the Problems) Therefore, the present invention is configured such that the vehicle speed and the conveying speed of the pre-processing conveying section are linked, and the conveying speed of the feed chain of the threshing section is constant, and the conveying speed of the grain culm is In a combine harvester that automatically controls the handling depth by sensing the culm length of the grain with a sensor and correcting the grain tip to the appropriate position, the position of the sensor for controlling the handling depth is set in the direction of the culm of the transported grain. In addition to being configured to be movable, the vehicle speed changing device and the sensor are linked, so that when the vehicle speed is changed to a low speed side, the sensor moves toward the tip of the head, and when the vehicle speed is changed to a high speed side, the sensor moves toward the stock end side. The sensor is configured to move and displace, and by the movement and displacement of the sensor, changes in handling depth due to changes in culm posture due to high and low vehicle speeds during transfer of grain culms from the pre-processing conveyance section to the feed chain can be adjusted to an appropriate handling depth. By correcting this, the above-mentioned problem is attempted to be solved.

(Function) In other words, the sensor for controlling the handling depth automatically moves to the shallow handling set position when the vehicle speed is high and to the deep handling set position when the vehicle speed is low, so that the grain is not transferred from the conveying section to the threshing section. During culm transfer, the culm posture does not change depending on the vehicle speed, and the handling depth does not change from deep to shallow, and is always maintained at a constant handling depth. This is how it was done.

(Example) Reference numeral 1 denotes a pretreatment conveyance section of a combine harvester A, which is attached to the front part of a traveling machine body 3 having a crawler traveling device 2 so as to be able to be raised and lowered via a hydraulic cylinder device (not shown). It has a cutting blade part (not shown) and a conveyance part 5 having a handling depth adjustment function, etc.
The grain culm conveyance speed of this pretreatment conveyance section 1 is configured to change in conjunction with the vehicle speed of the combine harvester A (as the vehicle speed becomes faster, the conveyance speed of the pretreatment conveyance section 1 also becomes faster). The conveyance speed of the feed chain in the threshing section is always maintained at a constant speed regardless of the vehicle speed. The erect grain culms in the field are pulled up by the pulling device 4, and after being cut by the cutting blade section and collected at the rear center of the pulling device 4, the erect grain culms in the field are gradually changed from the standing posture to the lodging posture by the conveying section 5. The grains are lifted up and conveyed while being transformed, and are transferred from the end of the conveyance to a feed chain 7 installed along the handling opening of the threshing section 6. Reference numeral 8 denotes a driver's seat located on one side of the front part of the traveling aircraft 3. Around the driver's seat 8 are a group of control levers a, including a main shift operation lever for controlling the vehicle speed transmission, a continuously variable shift operation lever, etc., and their operations. Panel b etc. are arranged.

By the way, the above-mentioned conveyance section 5 is a stock clamping conveyance chain 5.
A and a conveyor body 5b with protrusions for feeding stems are configured with two upper and lower endless belts that are low in the front and high in the rear, and the inclination angle of the conveyance part 5 can be freely changed by a drive mechanism not shown. As a result, the grain culm c
The handling depth can be freely adjusted by changing the position where the stock end is held, that is, the amount of protrusion of the tip. 5c is a conveyance cover.

9 is a sensor for controlling the handling depth, and two sensor bars 9a, 9a facing the channel 10 on the head side of the grain culm c.
have. The sensor 9 is attached to a bracket 12 fixed to the pipe frame 11 so as to be movable in the direction of the culm (in the direction of arrows D to E in FIG. 3). Further, the sensor 9 is connected to a vehicle speed changing device, and when the vehicle speed is changed to a low speed side, the sensor 9 is moved toward the tip side (direction D in Fig. 3), and when the vehicle speed is changed to a high speed side, the sensor 9 is displaced. is arranged to move toward the stock capital side (in the E direction). The one shown has a structure in which the gear arm 14 of the continuously variable transmission B is interlocked and connected via a wire 13. One end of the outer 13a of the wire 13 is fixed to the sensor mounting bracket 12, and the sensor 9 and A spring 15 is interposed between the brackets 12, and constantly biases the sensor 9 in the direction of shallow handling (direction of arrow E). 1
6 is a continuously variable speed control lever, H indicates a high speed position, L indicates a low speed position, and ML indicates a lowest speed position. 17 is a gear shifting rod, and 18 is a counter cam.

Although not shown, this continuously variable transmission device B employs a conventionally known continuously variable transmission mechanism that changes the speed by continuously changing the effective diameter of a split pulley around which a transmission belt is wound. 19 is a seat frame of the driver's seat 8.

In the configuration as described above, the continuously variable transmission B
When the control lever 16 is operated from the state shown by the solid line in FIG. 2 to the low speed position L, the shift arm 14
rotates clockwise and pulls the wire 13, so the sensor 9 moves against the spring 15 in the direction of arrow D in FIG. 3 (towards the tip of the grain culm c to be transported). Therefore, the sensor 9 is set in the deep handling position. Conversely, when the shift control lever 16 is operated to the high speed position H, the shift arm 14 and the wire 13 move in the opposite directions to the above, so the wire 13 is relaxed, but the spring 15 causes the sensor 9 to move in the direction of the arrow E.
It is pushed in the direction (direction of the stock) and set in the shallow handling position. In this way, when the grain culm is transferred from the conveyance section 5 to the feed chain 7 of the threshing section 6, the posture of the culm changes depending on the vehicle speed, and the depth of handling becomes deep (as shown in Fig. 4). (state) and shallow treatment (state A) will be automatically corrected and a constant level of depth of treatment will be maintained at all times.

(Effects) As described above, the present invention is configured so that the vehicle speed and the conveyance speed of the pre-processing conveyance section are linked, and the conveyance speed of the feed chain of the threshing section is constant, and the culm length of the conveyed grain culm is measured by a sensor. In the combine harvester, the handling depth is automatically controlled by sensing and correcting the tip to an appropriate position, in which the position of the sensor for controlling the handling depth is configured to be movable in the direction of the culm, A vehicle speed change device and a sensor are linked, and when the vehicle speed is changed to a low speed side, the sensor is moved and displaced toward the tip of the vehicle, and when the vehicle speed is changed to a high speed side, the sensor is configured to be moved and displaced toward the stock end side, The movement and displacement of the sensor corrects fluctuations in the handling depth caused by changes in culm posture due to vehicle speed during transfer of grain culms from the pre-processing conveyance section to the feed chain to the appropriate handling depth. The depth control sensor automatically moves to the shallow handling position when the vehicle speed is high and to the deep handling position when the vehicle speed is low, so grain culms are transferred from the pre-processing conveyance section to the feed chain of the threshing section. At the same time, due to fluctuations in vehicle speed, the conveyance speed of the pre-processing conveyance section and the conveyance speed of the feed chain change, which causes the grain culm feeding angle to the handling chamber to change, causing the handling depth to become deep or shallow. It is possible to prevent the inconvenience of running out, and the handling depth can always be maintained at an appropriate level regardless of changes in vehicle speed.
This has the effect of allowing the sensor position to be selected according to work efficiency and load.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view of a combine equipped with the present invention, Fig. 2 is a side view of the main parts, Fig. 3 is an enlarged front view of the main parts, and Fig. 4 is a plan view of the conveying section. In the figure, 1 is a pretreatment conveyance unit, 4 is a lifting device, and 5
6 is a conveying section with a handling depth adjustment function, 6 is a threshing section,
7 is a feed chain of the threshing section, 9 is a sensor for controlling the handling depth, B is a continuously variable transmission, and c is a conveying grain culm.

Claims (1)

[Scope of utility model registration request] The structure is configured so that the vehicle speed and the transport speed of the pre-processing transport section are linked, and the transport speed of the feed chain of the threshing section is constant, and the culm length of the transported grain culm is detected by a sensor and the ears are corrected to the appropriate position. In this combine harvester, the handling depth is automatically controlled by configuring the position of the sensor for controlling the handling depth to be movable in the culm direction, and the sensor is linked to a vehicle speed change device, When the vehicle speed is changed to a low speed side, the sensor is moved toward the tip of the head, and when the vehicle speed is changed to a high speed side, the sensor is moved toward the stock end. A handling depth sensor device for a combine harvester, characterized in that a handling depth sensor device for a combine is adapted to correct fluctuations in handling depth caused by changes in culm posture due to high or low vehicle speeds to an appropriate handling depth when grain culms are transferred from a grain culm to a feed chain.