JPS6312682Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a combine harvester configured to stabilize the handling depth by automatically operating the handling depth adjustment mechanism using a drive mechanism that is automatically activated based on the culm length detection result. The present invention relates to a height adjustment device.

The above-mentioned combine harvester handling depth adjustment device is designed to save labor by automating the handling depth adjustment, but there are two demands as described below. In other words, there is a desire to display the actual automatic handling depth control status so that the operator can accurately recognize whether automatic handling depth adjustment is being performed as desired without any trouble, and a desire to display the actual automatic handling depth control status. There is a desire to be able to switch to a state where the handling depth can be adjusted manually in the event of damage.

The present invention was developed in view of the above circumstances, and has a simple structure in which the operating lever provided for manual operation also serves as a display device, and which satisfies both of the above demands at once. The operation of connecting and disconnecting the drive mechanism and the handling depth adjustment mechanism, which is necessary when switching between a state in which depth adjustment is performed using a drive mechanism and a state in which it is performed manually, can be performed easily and quickly. We are trying to make it possible.

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

FIG. 1 shows a side view of the combine harvester, which includes a crawler traveling device 1, a threshing device 2,
This machine, which is equipped with a driver's seat 30, etc., is connected to a frame 3 which also serves as a transmission case and which can be adjusted up and down, and is connected to a device 4 for pulling up a planted stem culm, and a reaping device 5 for cutting the base of the lifted stem culm. A reaping processing section is connected and equipped, including a rear conveyance device 7, etc., which conveys the reaped stem culm in an upright position rearward and upward, changes it to a sideways position, and delivers it to the threshing feed chain 6. As the machine advances in the field, the planted stem culms are raised and harvested, and the harvested stem culms are sequentially handled and processed.

Next, the handling depth adjusting device will be explained based on FIGS. 2 to 6.

The rear conveyance device 7 swings up and down around a fulcrum P near the terminal end to change the support position of the reaped culm in the culm length direction, thereby reducing the amount of the culm tip inserted into the threshing device 2. Configured with a changing handling depth adjustment mechanism.

A swinging arm 8 is rotatably supported on the frame 3 via a mounting bracket 3a around a horizontal axis _X1 , and the free end of the arm 8 and the rear conveyance device 7 are connected to the rod 9. They are interlocked and connected through.

A case 10 is pivotally supported on the frame 3 so as to be able to freely swing around a horizontal axis _X2 , and a screw shaft 11 is rotatably supported on the case 10, and this screw shaft 11 is connected to an electric motor that can rotate in forward and reverse directions. 12 and is interlocked and connected via a worm reduction mechanism 13.

Another swinging arm 14 is provided which can swing around a coaxial center _X1 with the swinging arm 8, and this arm 1
A block member 15 pivotally supported by the screw shaft 11 is screwed onto the screw shaft 11. The swinging arm 8 has a penetrating portion 16.
b is formed, and a fitting hole 14a is formed in the other swinging arm 14, and the swinging arm 14 slides into a state in which it is fitted into the fitting hole 14a and a state in which it engages only in the penetrating portion 16b of the swinging arm 8. A connecting pin 16a is movably supported, and this portion constitutes a mechanism 16 that connects and disconnects the electric motor 12 and the rear transport device 7.

As shown in FIG. 1, swinging centers 17a are attached to the back of the lifting device 4 at appropriate intervals in the vertical direction and are pressed against the stem culm, and
The sensor 17a... is attached to the base of each sensor 17a...
A switch box 17b... equipped with an electric switch for detecting the rocking of... is provided, and the culm length is divided into multiple stages based on which sensor 17a... is pressed from the bottom to the top. A culm length detection device 17 is configured to detect and extract this as an electric signal.

a mounting bracket 3 fixed to the frame 3;
A sliding contact type electric switch mechanism 18 for controlling the operation of the electric motor 12 is attached to a. Although not illustrated, this switch mechanism 18 has a fixed contact and a movable contact that are connected to the culm length detection mechanism 17, and a swing operating arm 18a of the movable contact connects the swing arm 8 and the rod 19. culm length detection results so that the swinging position of the swinging arm 8, that is, the swinging position of the rear conveyance device 7, is at a preset position corresponding to the culm length. The electric motor 12 is configured to operate in forward or reverse rotation based on the above.

A bracket 8a fixed to the frame 3,
A swinging member 20a is rotatably supported around a coaxial center _X1 with the swinging arm 8, and this member 20a has a
An operating lever 20 is rotatably supported around a longitudinal axis Y that is orthogonal to the axis _X1 .

This operating lever 20 is located on the side of the driver's seat 30, and the operating lever 20 has an end of a connecting pin 16a that does not fit into the fitting hole 14a of the swing arm 14 in the disconnection mechanism 16. A long hole 21 is formed in which the part is locked so that it does not come out in a loose state, and the connecting pin 16a is locked in this long hole 21 as described above. and,
By swinging the operating lever 20 around the longitudinal axis Y, the disconnecting mechanism 16 can be switched between the disconnected state and the connected state, and the end of the connecting pin 16a is connected to the swing arm 14. When the disconnection mechanism 16 fitted into the insertion hole 14a is in the disconnected state, the operating lever 20 can be swung around the horizontal axis _X1 during manual operation, or the connecting pin of the disconnection mechanism 16 can be operated during automatic operation. 16a is fitted into the insertion hole 14a of the swing arm 14 and driven by the electric motor 12, so that the rear conveyance device 7 can be operated to swing up and down.

A guide frame 2 for the operation lever 20 is attached to a pair of front and rear support frames 23, 23 connected to the frame 3.
4 are connected by bolts. The guide frame 24 has a long groove 25 for swinging the lever, which allows the operating lever 20 to move back and forth in either the state where the disconnection mechanism 16 is disconnected or connected, and the lever swinging groove 25 that allows the operating lever 20 to move back and forth when the disconnection mechanism 16 is disconnected or connected. A plurality of locking grooves 26 for locking and holding the operating lever 20 that is laterally swung in the direction are formed at appropriate intervals in the front and rear direction, so that the operating lever 20 can be locked in a desired swinging position. Lever position holding mechanism 27 that holds the lever in place
is configured, and this lever position holding mechanism 27
When the operating lever 20 switches the disconnection mechanism 16 to the connected state, the operating lever 20
is configured to be in a non-operating state in which the lock is released.

The connecting pin 16a is held at three positions by a spring ball 28, and the operating lever 20 is held at three positions in the lateral direction by this holding force.

Further, the swing arm 14 is provided with the connection pin 1.
A guide plate 29 is attached to receive and guide the tip of the pin when inserting the pin 6a into the arm 14. (See Fig. 2) The handling depth adjustment device has the above-described structure, and has the control lever 20 in the lever position holding mechanism 27 in an unlocked, non-operating state, When the mechanism 16 is in the connected state, the rear conveyance device 7 is automatically operated by the electric motor 12 which is automatically operated based on the culm length detection result, thereby stabilizing the handling depth. At this time, the actual operating state of the automatic handling depth control is accurately displayed due to the swinging displacement of the operating lever 20, and the operator can monitor the operating lever 20 to control the automatic handling depth. This means that the actual operating state of depth adjustment can be accurately recognized.

Also, contrary to the above, the operating lever 20 in the lever position holding mechanism 27 is brought into the locking holding state,
In addition, when the connection/disconnection mechanism 16 is in the disconnected state, the rear conveyance device 7 is operated using the operating lever 20, and the handling depth is adjusted by locking and holding the operating lever 20 at a desired position. become something that can be done.

In summary, the present invention provides a handling depth adjustment device for a combine harvester having the above-mentioned structure, in which the handling depth adjustment mechanism is artificially operated in conjunction with a swinging operation in one direction. The operating lever is configured to be able to swing in a direction different from the swinging operation direction in one direction for adjusting the handling depth, and to be able to swing in the different direction. A lever position holding mechanism is provided which can switch between a locking holding operating state in which the operating lever is locked and held at a desired operating position in response to a swinging operation, and a non-working state in which the locking is released; A mechanism is provided for disconnecting and disconnecting the connection between the mechanism and the handling depth adjustment mechanism, and the disconnection mechanism is switched to the disconnection side in conjunction with the operation of the operating lever in the direction of releasing the locking hold. It is characterized by being configured so that it can be operated freely.

That is, the swinging operation of the operating lever in a direction different from the swinging operation direction in one direction for adjusting the handling depth is the switching operation of the intermittent mechanism. Therefore, there is no need to be particularly conscious of switching between automatic and manual depth adjustment. In addition, if the manual operation lever is unlocked, the manual operation is automatically enabled, so switching between automatic and manual operation is possible with a simple operation of the operation lever.
It can be done easily and quickly, and the handling depth during automatic handling depth adjustment can be easily confirmed by visually observing the position of the operating lever in the lever position holding mechanism, which eliminates troubles during automatic handling depth adjustment. This has the effect of making it easier to discover.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the handle depth adjustment device for a combine harvester according to the present invention, FIG. 1 is a side view of the combine, FIG. 2 is a side view showing the swing operation structure of the rear conveyance device, and FIG. 3 is a swing FIG. 4 is an exploded cross-sectional plan view showing the pivoting portion of the movable arm and the operating lever; FIG. 4 is a vertical cross-sectional front view of the electric motor mounting portion; FIG. Figure 6 is a plan view of the guide frame. 7... Handling depth adjustment mechanism, 12... Drive mechanism, 1
6...Connection/disconnection mechanism, 20...Operation lever, 27
...Lever position holding mechanism.

Claims (1)

[Scope of utility model registration request] A handling depth adjustment device for a combine harvester configured to automatically operate a handling depth adjustment mechanism 7 using a drive mechanism 12 that is automatically operated based on a culm length detection result to stabilize the handling depth, In the depth adjustment mechanism 7,
Operation lever 2 that can manually operate the handling depth adjustment mechanism 7 with a swing operation in one direction
0 are interlocked and connected, and the operating lever 20 thereof is configured to be swingable in a direction different from the swinging operation direction in one direction for adjusting the handling depth, and the swinging operation in the different direction. A lever position holding mechanism 27 is provided which can be switched between a locking holding operating state in which the operating lever 20 is locked and held at a desired operating position and a non-working state in which the locking is released.
A mechanism 16 for disconnecting and disconnecting the drive mechanism 12 and the handling depth adjustment mechanism 7 is provided, and the disconnection mechanism 16 is linked to the operation of the operating lever 20 in the direction of releasing the locking hold. A combine harvester handling depth adjustment device, characterized in that the device is configured to be able to freely switch between coupling and disconnection.