JPS6237931B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combine harvester in which handling depth can be adjusted by vertically oscillating a grain conveying device from a reaping section to a threshing section via a screw mechanism.

In this type of handling depth adjustment device for a combine harvester, the handling depth adjustment operation accompanying changes in the culm length of the grain culm to be harvested is automated by driving the aforementioned spiral mechanism based on the detection result of the culm length detection sensor. By doing so, you can reduce the work effort and
It is possible to perform adjustment with good response, which is good in terms of threshing performance, but with only such automatic adjustment, for example,
If there is any operational trouble with the culm length detection sensor or the grain culm conveying device that operates in conjunction therewith, or if there is a failure in the electrical system, there is an inconvenience that the handling depth cannot be adjusted at all. Therefore, when configuring the above-mentioned automatic adjustment device, as a countermeasure in case of trouble in its operation, a manual adjustment device that can swing the grain culm conveying device up and down by manual operation is provided. It is desirable to have one attached.

As mentioned above, in order to make automatic adjustment and manual adjustment interchangeable, one of the pair of male and female screw members constituting the screw mechanism is connected to a rotary drive device such as a motor associated with the culm length detection sensor and a manual rotation operation. For example, the one that is linked to the ingredients is JP-A-53.
-134619, etc., but in this case, the rotation drive device linked to the one screw member acts as manual rotation operation resistance during manual adjustment, so manual adjustment is very difficult. In particular, when the rotation drive device such as the motor is out of order, the manual rotation operating tool cannot be rotated at all, that is, manual adjustment is virtually impossible.

In view of the above circumstances, the present invention aims to make it possible to manually adjust the handling depth using the manual rotary operating tool with little effort even if the rotary drive device breaks down. In the above-mentioned device, the screw member is interlocked with a rotary drive device that drives one of the pair of female and male screw members constituting the screw mechanism based on the detection result of the culm length detection sensor. a first rotation stop mechanism, the other of which is interlocked with a manual rotation operation tool, and capable of freely stopping, fixing and releasing the rotation of the screw member that is interlocked with the manual rotation operation tool; and the rotation drive mechanism. The apparatus is characterized in that it is provided with a second rotation stop mechanism capable of freely stopping, fixing, and releasing the rotation of the screw member that is interlocked with the device.

That is, in the case of the present invention, one of the pair of female and male screw members constituting the screw mechanism is connected to the rotation drive device and the other to the manual rotation operating tool, and the first and second rotation stop mechanisms are connected to each other. By stopping and fixing or releasing the rotation of both screw members as appropriate, the depth of handling can normally be adjusted appropriately and favorably by automatic adjustment. In this case, the adjustment can be made manually, and in this manual adjustment, unlike conventional devices, the rotational drive device does not act against the rotational operation of the manual rotation operating tool, even if the motor etc. Even if the rotary drive device breaks down, automatic adjustment of the handling depth using this manual rotary operating tool can be easily and reliably performed with little effort.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a combine harvester. At the front of a traveling machine body 2 on which a threshing unit 1 having a threshing feed chain 1A is mounted, there is a pulling device 3 for pulling up the planted grain culm rearward and upward, and a A reaping section 5 consisting of a clipper-type cutting blade 4 or the like that cuts the base of the culm is arranged so as to be movable up and down around the first horizontal axis _P1 near the conveyance start end of the threshing feed chain 1A, Between the reaping section 5 and the threshing section 1 , there is a stock clamping and conveying device 6 that clamps the stock base of the harvested grain culm and transports it to the transport start end of the feed chain 1A.
Then, the tip of the harvested grain culm is locked, and the attitude of the harvested grain culm is gradually changed to a sideways posture in cooperation with the grain clamping and conveying device 6, and the grain culm is conveyed and supplied to the grain culm supply port of the threshing section 1 . A grain culm transporting device 8 consisting of a ear tip locking and transporting device 7 is installed so as to be vertically swingable with respect to the reaping section 5 _around the first horizontal axis P1. By vertically swinging the grain culm 8 around the first horizontal axis P ₁ with respect to the reaping section 5 , the insertion length of the grain culm into the handling chamber of the threshing section 1 , that is, the handling depth is adjusted. .

The handling depth adjusting device is constructed as shown in FIGS. 2 to 4.

That is, the reaping frame 9 also serves as a transmission case of the reaping section 5 and the support member 6A of the stock clamping and conveying device 6.
, first and second cylindrical members 10 _{and 11 having axes P 2 and} P ₃ parallel to the first horizontal axis P 1 are provided. The first and second mounting members 12 are inserted and supported so as to be rotatable only,
Between 13 and 13, a screw mechanism 14 for vertically swinging the grain culm conveying device 8 around the first horizontal axis _P1 is interposed, and a pair of female and male screws constituting the screw mechanism 14 are installed. Among the members 14A and 14B, a handle 15, which is a manual rotation operating tool, is fixed to the upper end of the male threaded member 14B, which is rotatably supported by the first mounting member 12.

Further, the second mounting member 13 is provided with a motor 17, which is one of the rotation drive devices, which operates based on the culm length detection result of the culm length detection sensor 16 provided on the back side of the lifting case 3A of the lifting device 3, The motor 17 and the female screw member 14A rotatably supported by the second mounting member 13 are connected to the motor 1.
Worm gear 1 formed on the outer periphery of the worm 18 fixed to the drive shaft 17a of No. 7 and the female screw member 14A.
A lock mechanism 20 is provided which can selectively stop, fix and release the rotation of both the female and male screw members 14A and 14B.

The lock mechanism 20 includes a first rotation stop mechanism 2 on the side of the male screw member 14B that is interlocked with the handle 15.
0A, and a female screw member 1 interlocked with the motor 17.
The first rotation stop mechanism 20A is constructed as follows.

That is, the first rotation stop mechanism 20A attaches to the first mounting member 12 so that the rotation axis a of the male threaded member 14B is
A cylindrical member 21 having an axis b in a direction perpendicular to the direction is fixed, and a step is formed on the cylindrical member 21 at one location on the circumference of the male threaded member 14B facing the cylindrical member 21. A ball 23 that can be fitted into the portion 22 and a spring 24 that biases the ball 23 toward the male threaded member 14B are installed inside the tubular member 21. An adjustment bolt 25 that can adjust the force is screwed together to stop and fix the ball 23 from rotating the internally threaded member 14B, and when a rotational load exceeding the setting is applied, the ball 23 is removed from the stepped portion 22. It is configured to automatically release the stop when the vehicle runs over the vehicle and moves.

The second rotation stop mechanism 20B is composed of the worm 18 and the worm gear 19.

When the handling depth is automatically controlled based on the culm length detection result of the culm length detection sensor 16,
By stopping and fixing the rotation of the male threaded member 14B in advance by the first rotation stop mechanism 20A, the motor 1 is stopped based on the culm length detection result of the sensor 16.
7, the female screw member 14A rotates and moves in the longitudinal direction of the male screw member 14B, and along with this, the motor 17 and the second mounting member 13 also move up and down, and the grain culm conveying device 8 It is oscillated up and down around the first horizontal axis _P1 and adjusted to an appropriate handling depth.

Furthermore, during manual depth adjustment, the female threaded member 14A is stopped and fixed by the second rotation fixing mechanism 20B, and the male threaded member 14B is not rotated by the rotation of the handle 15. Therefore, the female screw member 14A moves in the longitudinal direction of the male screw member 14B together with the motor 17 and the second attachment member 13, and accordingly, the grain culm conveying device 8 vertically swings around the first horizontal axis _P1 . be done.

At this time, the first rotation stop mechanism 20A is in a stop release state because the rotational force from the handle 15 acts to move the ball 23 up from the stepped portion 22. In this embodiment, the manual rotational load is set to be greater than the rotational load on the first rotation stop mechanism 20A from the normal driving force of the motor 17.

FIG. 5 shows another embodiment, in which the reaping frame 9 of the reaping section 5 and the support member 6A of the stock clamping and conveying device 6 are shown.
First and second cylindrical members 10 and 1 having axes P ₂ and P ₃ parallel to the first swing axis P 1 of the grain culm _conveying device 8 .
1, and these first and second cylindrical members 10, 11
A screw mechanism 14 for vertically swinging the grain culm conveying device 8 around the first horizontal axis _P1 is configured between the first and second mounting members 12 and 13, which are inserted and supported so as to be rotatable only. A pair of female and male screw members 14A, 1
4B, a handle 15, which is a manual rotation operating tool, is fixed to the upper end of a female screw member 14A that is rotatably supported by the second mounting member 13.

Further, the first mounting member 12 is provided with a motor 17, which is one of the rotary drive devices that operates based on the culm length detection result of the culm length detection sensor 16, and the motor 17 and the first mounting member 12 are rotatable only. The worm 18 is fixed to the drive shaft of the motor 17, and the worm gear 1 is fixed to the lower end of the male threaded member 14B.
A locking mechanism 20 is provided which can selectively stop, fix and release the rotation of both the female and male screws 14A and 14B. By rotating the handle 15 or driving and rotating the motor 17, the female threaded member 14A is rotated relative to the male threaded member 14B which is in a stopped and fixed state, or the male threaded member 1
The grain culm conveying device 8 is configured to be vertically swung around the first horizontal axis _P1 by rotating the grain culm 4B relative to the female screw member 14A which is in a stopped and fixed state.

The lock mechanism 20 includes a first rotation fixing mechanism 2 on the female threaded member 14A side that is interlocked with the handle 15.
0A, and a male screw member 1 interlocked with the motor 17.
The first rotation stop mechanism 20A is constructed as follows.

That is, the member 27 connected to the second mounting member 13 is fitted into a groove 26 formed on the outer circumferential surface of the female threaded member 14A along the axis of rotation, thereby stopping and fixing the rotation of the female threaded member 14A. At the same time, when a rotational load exceeding the setting is applied, the groove 26
A spring ball 23 is provided which can be released from the stop and automatically release the stop.

FIG. 6 shows a first rotation stop mechanism 20A on the side of the male threaded member 14B that is interlocked with the handle 15 of the above-mentioned embodiment.
Another structure is shown in which a cylindrical member 21 having an axis b in a direction perpendicular to the direction of the rotation axis a of the male threaded member 14B is fixed to the first mounting member 12, and to this cylindrical member 21, It slides between a state in which it is fitted into a locking hole 28 formed at one location on the circumference of the male threaded member 14B portion to stop and fix the rotation of the male threaded member 14B and a state in which it is released from the locking hole 28. A switchable lock pin 29 is provided, and a spring 31 is provided between the manual switching lever 30 of the lock pin 29 and the cylindrical member 21 to bias and hold the lever 30 in the stop lock position and the lock release position.
It is an intervening one.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the handling depth adjustment device for a combine harvester according to the present invention, FIG. 1 is a side view, FIG. 2 is a partially cutaway rear view of the main part, and FIG. 3 is a part of the main part. FIG. 4 is an enlarged sectional view of the main part, and FIGS. 5 and 6 are partially cutaway views of the main part showing other embodiments. 1 ... threshing section, 5 ... reaping section, 8 ... grain culm conveyance device,
14...Screw mechanism, 14A, 14B...Screw member, 1
5... Manual rotation operating tool, 16... Culm length detection sensor,
17...Rotation drive device, 20A...First rotation stop mechanism, 20B...Second rotation stop mechanism.

Claims (1)

[Claims] 1 Grain culm conveyance device 8 from the reaping section 5 to the threshing section 1
This is a combine harvester in which the handling depth can be freely adjusted by vertically swinging and displacing the screw member through a screw mechanism 14. One of the screw members is interlocked with a rotation drive device 17 that is driven based on the detection result of the culm length detection sensor 16, and the other is interlocked with a manual rotation operation tool 15, and the screw member that is interlocked with the manual rotation operation tool 15. A first rotation stop mechanism 20A that can freely stop, fix and release the rotation of 14A or 14B; and a first rotation stop mechanism 20A that can freely stop, fix and release the rotation of the screw member 14A or 14B that is linked to the rotational drive device 17. A handling depth adjustment device for a combine harvester, characterized in that a second rotation stop mechanism 20B is provided.