JPH0130991Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a combine harvester in which the clutch of the reaping conveyance system can be turned on and off as desired using a clutch control lever, and can also be automatically turned off when the reaping section is raised. Regarding the mechanism,
Specifically, the operating member connected to the clutch of the reaping conveyance system is constructed so that it can be turned on and off using a clutch operating lever, and the reaping section, which can be driven up and down relative to the traveling vehicle body, is raised to a set height relative to the machine body. A link mechanism is provided to displace the operating member toward the clutch cutting side in conjunction with each other, and a pair of bending/extending links are provided in this link mechanism. This invention relates to an improvement in a structure in which the posture of one bending/extending link can be switched between two states and swingably configured so that the flexibility is reduced and the flexibility is increased when the bending/extending link is extended and extended.

The above-mentioned clutch operation mechanism changes the flexibility of operation to the clutch cutting side as the reaping section rises by changing the posture of the bending link, thereby allowing the clutch to perform an automatic cutting operation when the reaping section rises, and controlling the operation. However, in the past, a lever for changing the posture was attached to one of the bending links to be changed, so it was necessary to operate the switching lever by the required swing angle of the bending link. This required a large amount of operating space.

An object of the present invention is to provide an operating mechanism that can reduce the operating angle of the switching lever by changing the installation position of the bending link posture switching lever, and that can be made compact.

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

Figure 1 shows a side view of the combine harvester, which is equipped with a crawler traveling device 1, a threshing device 2, an engine 3, and a pulling device 5, a reaping device 6, and a merging conveyor for harvested grain culms. A reaping section 10 equipped with a group of 7 devices and a rear conveyance device 9 for supplying the combined grain culm to the threshing feed chain 8 is hydraulically connected around a fulcrum P so as to be movable up and down.

FIG. 2 schematically shows the transmission system of the combine harvester, in which the output of the engine 3 is branched into two systems, one of which drives the hydraulic continuously variable transmission 11, and the other drives the threshing device 2 and the feed chain. 8
is driven. Then, the speed change output of the transmission device 11 is input to the traveling gear transmission case 12 and is transmitted to the reaping section 1 via the transmission clutch 13.
It is branched and transmitted to each device 5, 6, 7, and 9 of 0.
Further, the threshing system is provided with a threshing clutch 14 and a clutch 15 that can drive and intermittent only the feed chain 8.

The clutches 13 and 15 can be said to be transmission clutches for the harvested grain culm conveyance system, and in addition to being able to be turned on and off manually, they are configured to be able to be turned on and off automatically in conjunction with the raising and lowering of the reaping section 10. The detailed structure thereof will be explained below based on FIGS. 3 to 5.

Operation box 1 located on the side of the pilot seat 16
A clutch operating lever 19 is supported by a fixed frame 18 in a support shaft 20 so as to be swingable back and forth, and a clutch operating member 22 is supported via a support shaft 21 so as to be swingable up and down. An arm 22a extending in the opposite direction from a boss of 22 and the reaping portion clutch 13 and feed chain clutch 15, which are inserted and biased, are connected to the release wire 2.
3 and 24 are linked.

Further, a roller 26 is provided at the intermediate portion of the operating member 22 and acts on a cam 25 provided at the base of the clutch operating lever 19. When the lever 19 is operated to the forward swing position a, the roller pressing action by the cam 25 is caused. When released, the actuating member 22 is in the upward swinging position, so that both clutches 13, 15 are in the engaged state. Then, when the lever 19 is swung to the rear swiveling position b, the operating member 22 is swung downward by the roller pressing action of the cam 25, and the wire 2
3 and 24 are pulled, and both clutches 13 and 15 are disengaged. In addition, in this clutch disengaged state, the cam 25
The roller 26 passes over the top of the lever 19, and the lever 19 is held at the clutch disengaged position b.

An automatic operating arm 27 as an automatic clutch operating member is loosely fitted and supported on the support shaft 21, and a rotation shaft 29 is supported on a pipe-shaped boss 28 provided at the free end of the automatic operating arm 27. An arm 30 is protruded from the outer periphery of the boss 28, and a link 31 is pivotally connected to the tip of the arm 30.
1 and the operating member 2.
A pin 33 is attached across the tip of the
By swinging the automatic operating arm 27 downward around the support shaft 21, the link 31 is pulled and shifted downward, so that the operating member 22 is swinged downward, that is, in the clutch disengagement direction. Further, a stopper bolt 34 is attached to the upper end of the link 31 so as to come into contact with the pin 33, so that the setting position of the link 31 with respect to the operating member 22 can be adjusted.

Further, a link 35 is fixed to the other end of the rotation shaft 29, and a link 36 which is pivotably connected to the tip of the link 35 in a bendable manner extends downward, and its lower end is connected to an elongated hole 37 and a pin. It is connected to a relay swinging arm 39 via 38. A release wire 40 linked to the tip of this arm 39
is linked to a swinging arm 41 provided near a fulcrum P of the reaping section 10, and the reaping section frame 10a pivotally supported on the fulcrum P and the swinging arm 41
are interlocked and connected by a rod 42 with a turnbuckle, and the wire 40 is pulled by the upward swinging motion of the reaping section 10.

Further, the link 35 is connected to the pin 4 with respect to the boss 28.
3 and a pair of stoppers 44, it is configured to be able to bend and extend and swing only within a certain range.

Further, another pipe boss 45 is provided on the side of the boss 28.
are fixed in parallel, and the pair of bending links 3
A fork-shaped operating arm 48 that engages with the pivot connecting pins 47 of 5 and 36 is fixed, and a switching lever 49 is attached to the other end of the rotation shaft 46.
By the swinging operation of this lever 49, the bending link 35 is largely switched and swinged between two positions regulated by stoppers 44, 44.
In this case, the length of the arm 48 is set so that the operating angle of the lever 49 is approximately halved relative to the swing angle of the link 35.

When the lever 49 is switched to the clockwise end position c as shown in FIG. When switching to the terminal position d in the counterclockwise direction, the bending link 35 is largely collapsed to the side, and the other link 3
It is set to be in an extended posture with respect to 6. In addition, in the state shown in FIG. 3, the relay swing arm 39
The pin 38 is located near the lower end of the elongated hole 37, and conversely,
In the state shown in FIG. 4, the pin 38 is located above the elongated hole 37.

Therefore, in the state shown in FIG. 3, when the wire 40 is pulled by the upward swinging of the reaping section 10 and the arm 39 swings downward, the link 36 has a slight flexibility.
is pulled down and the link 35 is in the rotation limit position.
The automatic operation arm 27 is swung downwards via the lever, and the clutches 13 and 15 are automatically disengaged.
can be entered. In this case, by adjusting the stopper bolt 34, the initial amount of play between the elongated hole 32 and the pin 33 can be adjusted, and the raised position of the reaping section 10 at which the clutch is automatically cut can be adjusted. In this state, the clutch can also be freely operated using the manual lever 19.

Further, in the state shown in FIG. 4, even if the wire 40 is pulled to the maximum by the raising of the reaping section, the link 36 is not pulled down due to the large flexibility of the elongated hole 37 and the pin 38, so that the clutch is not automatically engaged. A clutch disengagement operation is not performed, and the clutch disengagement operation is only possible using the manual lever 19.

In other words, when the lever 49 is in the o position, the clutch is operated manually and the clutch is automatically operated in conjunction with the raising and lowering of the reaping section.
In addition, only manual clutch operation can be achieved at position d.

Reference numeral 50 in FIG. 5 is a threshing clutch operating member rotatably attached to the support shaft 21, and an arm 50a extending from the boss thereof and the threshing clutch 14 are linked by wire. and,
The threshing clutch is configured to be arbitrarily disconnected by pressing down a roller 51 provided at the tip of the operating member 50 in contact with a cam 53 of a threshing clutch lever 52 coaxially arranged in parallel with the clutch operating lever 19. There is.

As explained above in the embodiments, the present invention has the advantage that the clutches 13 and 15 of the reaping conveyance system move as the reaping section rises.
A bending/extending link 35 that swings between a state where the switch is automatically switched and a state where the switch is not operated.
The switch lever 49, which swings on an axis different from the swing axis of the link 35, is contacted and swinged by an arm 48 connected to the switch lever 49, so that the switch lever 4
By selecting the position of the 9-axis center and appropriately setting the length of the arm 48, the switching lever 49 can be operated at a lever swing angle that is smaller than the required swing angle of the bending/extending link 35.
This makes it possible to operate the machine, which is advantageous in terms of operability and operating space.

[Brief explanation of the drawing]

The drawings show an embodiment of the clutch operation mechanism of a combine harvester according to the present invention, in which Fig. 1 is an overall side view of the combine, Fig. 2 is a transmission system diagram, and Fig. 3 is an "automatic"
FIG. 4 is a side view showing the clutch operating mechanism in the "manual"state;
FIG. 5 is an exploded cross-sectional plan view of the clutch operating mechanism. 4... Traveling vehicle body, 10... Reaping section, 13, 14
...Conveyance system clutch, 19...Clutch operating lever, 22...Clutch operating member, 35, 36...
Bending/extending link, 48...operating arm, 49...switching lever.

Claims (1)

[Scope of utility model registration request] The operating member 22 connected to the clutches 13 and 15 of the reaping conveyance system is configured to be able to be turned on and off by a clutch operating lever 19, and the reaping section 10, which can be driven up and down with respect to the traveling vehicle body 4, is moved up to a set height relative to the machine body. In conjunction with being raised, the operating member 22
A link mechanism is provided for displacing the clutch to the clutch disengaging side, and a pair of bending/extending links 3 are provided in this link mechanism.
5, 36 are provided, and when the bending links 35, 36 are bent, the flexibility to the clutch cutting operation side as the reaping part rises becomes small, and the bending links 35, 36
The clutch operation mechanism for a combine is configured such that the posture of one bending link 35 can be freely switched between two states so as to increase the flexibility when the bending link 35 is extended, and the one bending link 35 to be switched is configured to be swingable. A switching lever 49 is provided at a location different from the posture switching swing axis of 35, and this switching lever 49
A clutch operating mechanism for a combine harvester, wherein the one bending link 35 can be brought into contact with and swung into the two states by an operating arm 48 extending integrally therefrom.