JPS63130478A - Travel steering device for combine and the like - Google Patents

Abstract

PURPOSE:To make a brake accurately operate even if there is a rattle in an interlocking mechanism by providing a cam mechanism which is interlocked so as to brake a traveling brake, in between an operating lever and an interlocking mechanism for braking said traveling brake. CONSTITUTION:An operating lever 2 has a rotary piece 9 which is rotatable around a lateral shaft with respect to a bracket, a rotary piece 11 which is rotatable around a longitudinal shaft 10 with respect to the rotary piece 9, and a switch case 12, etc. A cam 17 which is rotatable around a cam shaft and a pin which is integrally formed with the cam 17 are provided on the downside of the lateral shaft 8 and the longitudinal shaft 10, and a cam edge 19 is formed on the cam 17. An operating arm 21 which is rotatable around a shaft 20 is provided on one side of the cam shaft 16 and a cam pin 22 provided on one end of this operating arm 21 is engaged with the cam edge 19. By revolving the cam 17 right and left, the operating arm 21 can be swung around the shaft 20.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a strike control device for a combine harvester or the like, in which a strike brake is activated at the disengaged position of the strike clutch to eliminate the rotation of the running device on the disengaged side of the strike clutch. In addition to combine harvesters, it can also be used for rice transplanters, transport vehicles, tractors, etc.

Conventional technology By tilting and rotating the operating lever to the left or right, the running clutch on the rotating side is disengaged, and by further rotation in the same direction, the running gear on the disengaging side of the striking clutch is disengaged. Activate the travel brake to apply braking.

Problems to be Solved by the Invention In this type of strike operation device, if the interlocking mechanism that operates the strike brake has looseness due to gaps or looseness, the strike brake will not work properly and the running device may become unstable. The turning performance is poor and the feel of strike direction control is poor.

Means for Solving the Problems This invention provides an operating lever (2) that tilts left and right to interlock a strike clutch (1), and a control lever (2) that interlocks a strike clutch (1).
An interlocking mechanism (4) that brakes the strike brake (3) in the off position of 5) is the configuration of a strike direction control device such as a combine harvester.

Functions and Effects of the Invention When the operating lever (2) is placed in the neutral position, both the left and right strike clutches (1) are in the engaged state, and the vehicle is in a state where power is transmitted to the left and right traveling devices and the vehicle is ready to travel. Of course, at this time, the running brake (3) is not exerting any braking force at all.

When attempting to correct strike direction or turn while driving, move the operating lever (2
) is rotated at an angle, this disengages the left thrust clutch (1).

Since the power transmission to the left traveling gear is cut off, the strike direction is changed to the left. When the operating lever (2) is returned to the neutral position, the left running clutch (1) is engaged and the vehicle travels straight after changing the running direction.

When driving on soil surface conditions or when making a sharp turn, when the operating lever (2) is further tilted to the left from the disengaged position of the left strike clutch (1), the lever is engaged via the cam mechanism (5). The mechanism (4) is actuated in the tension direction to apply the strike brake (
The operating parts 3) are operated in conjunction with each other, and this left-hand running brake (3) is linked, braking the running gear of the left-hand side when the running clutch (1) is disengaged, thereby preventing sudden turns, etc. conduct.

When braking this strike brake (3), the strike brake (3) is controlled by the interlocking mechanism (
By interlocking the pulling direction in 4), the braking force can be sensitively adjusted, and it is possible to quickly respond to the operator's operational feeling and perform accurate strike direction operation.

Example 1 In Figures 1 to 8, the operating lever (2)
is the horizontal axis (8) relative to the bracket (7) of the control platform (6).
), a rotating piece (9) that can freely rotate around the rotating piece (9), and a rotating piece (11) that can freely rotate around the front-rear axis (10) with respect to this rotating piece (9).
, and a switch case (12) mounted on this rotating piece (11). The lower end of the operating lever (2) is attached to this switch case (12) so that it can be rotated left and right, and the lower end of the operating lever (2) can be rotated to the left and right within a certain angle range. The configuration is such that the left and right limit switches (13) provided in the switch case (12) are turned on by the motion.

Turn the operating lever (2) to the left and right to turn on the limit switch (13), and then turn the limit switch (13) on.
13) is turned on and tilted in the same direction, the switch case (12) is rotated together with the rotating piece (11) about the front-rear axis (10). An engagement groove (15) is provided in the downwardly projecting arm portion (14) of the rotating piece (11).

Regarding the cam mechanism (5), the horizontal axis (8) and the longitudinal axis (
On the lower side of 10), there is a cam (17) that is rotatable around the cam shaft (1B) in the front and back direction, and a bottle (18) that is integrated with this cam (1?). A V-shaped cam edge (19) is formed, and the pin (18) is attached to the arm portion (14).
This arm part (14) is engaged with the engagement groove (15) of the arm part (14).
The cam (17) is rotated left and right by the left and right rotation of the cam (17). On the negative side of this camshaft (IB) is a parallel shaft (2
A cam bin (22) provided at one end of the operating arm (21) is engaged with the cam edge (19) of the cam (17), and the cam (
By rotating the cam bin (17) left and right, the cam bin (22
) is engaged with the cam edge (19) and rotated in a direction to push the cam shaft (16) outward from the rotation center, thereby swinging the actuating arm (21) around the shaft (20). It is.

The interlocking mechanism (4) includes a rod (23) connected to the other end of the operating arm (21), a bell crank (25) rotatable around the shaft (24), a rod (2B), and a shaft (23). 27) The structure is such that the strike brake valve (29) is operated as a link that is interlocked and connected via a rotatable bell crank (28) or the like at the center. This actuating arm (21) is engaged with the cam edge (18) and the cam bin (
22) so as to push out the actuating arm (21).
The interlocking mechanism (4) is interlocked in the tension direction, and the final bell crank (28) of the interlocking mechanism (4) is configured to press the bushing rod of the strike brake valve (29).

A shaft (30) is connected to the side of the horizontal shaft (8), and from this M (30), a link machine W (35) is used to raise and lower the reaping device a (31) of the combine with respect to the vehicle body (32). The lift valve (34) of the hydraulic cylinder (33) is operated to switch up and down.

In addition to this hydraulic cylinder (33), the hydraulic circuit is provided with a hydraulic clutch cylinder (38) that controls the strike clutch (1) and the strike brake (2), and the operation of the left and right strike clutches (1) is switched depending on the strike direction. This is carried out by the solenoid actuation of the clutch valve (37), and the running brake (3) is carried out by the running brake valve (29). Of these, the strike clutch valve (37) is connected to the limit switch (13) of the switch case (12).
The structure is such that it can be switched between left, right, and neutral using a solenoid. In addition, a direction sensor (38) for detecting the cutting row of culms is provided in the weeding frame of the reaping device (31), and the strike clutch valve (37) is controlled by the solenoid based on the signal from this direction sensor (38). It is configured to do so.

(39) is the hydraulic pump of the hydraulic circuit, (40) is the beam leaf valve, and (41) is the tank boat.
) and a reservoir piston (
42) is provided opposite to the disengaged position of the running clutch (1) in which each piston (42) operates, and stops excessive supply of hydraulic pressure in the clutch cylinder (38) to the piston (42).
An oil drain passage (43) is provided to stop further hydraulic operation of the brake, and an oil drain passage (44) is provided opposite the position where the running brake (3) is braked. Among these, the above-mentioned strike brake valve (29) is provided in the oil drain passage (43), and the strike brake valve (28) can be closed by rotating the operating lever (2) from side to side via the interlocking mechanism (4) or the like. As a result, the hydraulic pressure in the clutch cylinder (36) is increased to operate the travel brake (3).

The combine has a pair of left and right crawler-type traveling devices (45
), from the engine to the transmission bag fi (47) in the transmission case (46), and the above-mentioned running clutch (1),
The power is transmitted via the wheel shaft (48) and the like. Reaping device (31
) are a culm lifting device (49), a cutting blade device (50),
A shell culm collection device (51), a shell culm transfer device (52), etc. are provided, and as mentioned above, it can be raised and lowered around the lifting shaft (53) by expanding and contracting the lifting cylinder (33). (54
) is a rear threshing device, which threshes the husk transferred by the husk culm transfer device (52) while being transferred to the feeding device (55). A control platform (6) is provided on the side of this reaping device (31). (5B) is the cockpit.

The running clutch (1) is provided so as to be slidable left and right on the running clutch shaft (57), and is operated by the piston (42) of the clutch cylinder (36) from the speed change transmission (47) side. Transmitted gear (58)
It can be fitted with a spline to create a running clutch, or removed from this fit to create a disconnection. In addition, this running clutch (1) is connected to the gear (5θ) of the opposing wheel shaft (48).
) and are constantly interlocked. A multi-disc strike brake (3) is provided on the outside of each strike clutch (1), and these strike clutches (1) are disengaged from the gear (58) to disengage the strike clutch and move further outward. By pressing the strike brake (3), the wheel shaft (4)
8) The strike clutch/ch (1) which is reversely transmitted from the side is braked. (60) is an input shaft.

By rotating the operating lever (2) from the neutral position to the left or right, the left or right traveling device (45
) can operate the running clutch (1) and running brake (3). The interlocking at this time is the strike clutch (1
) is important by switching the strike clutch valve (37), which is a solenoid valve, between left and right by turning on and off the left and right limit switches (+3) inside the switch case (I2).

Hydraulic pressure is sent to the left or right hydraulic clutch cylinder (36), and the piston (42) is pressed to the position of the oil drain passage (43), so that the strike clutch (1)
The clutch is disengaged when the clutch disengages from the gear (58).

When the operating lever (2) is further rotated in the same direction, the switch case (12) and arm (14) are rotated,
Rotate the cam (17) around the cam shaft (16) so that the cam edge (
19) presses the cam pin (22) and swings the actuating arm (21) around the axis (20).This actuating arm (21) presses the cam pin (22) and swings the actuating arm (21) around the axis (20). (22) is swung away from the camshaft (16) in a constant direction, and the interlocking mechanism (4) is interlocked in the direction of pulling by this actuating arm (21), thereby causing the bell The tip of the crank (28) presses the strike brake valve (29) and closes it. Therefore, the oil drain passage (43) is closed or constricted, and the oil pressure inside the strike clutch cylinder (36) increases, causing the piston on the operation side to (42) is pushed up until it reaches the oil drain passage (44),
The strike brake (3) is pressed and braked by the strike clutch (1), and the rotation of the strike clutch (1), which attempts to follow the running gear (45) on the strike clutch side, and this running bag 21 (45). Apply the brakes and make a sharp turn.

When rotating the operating lever (2) in the front-back direction, the rotating piece (11) and the shaft (8) are rotated in the same direction. Therefore, the lift valve (34) is switched to the lift side or the fall side via the shaft (30), link mechanism (35), etc., and the lift cylinder (33) is expanded and contracted to control the lift of the reaping device (31). do. At this time, the arm portion (14) of the rotating piece (11)
The engagement groove (15) is always engaged with the pin (1B) of the cam (17) at both forward and backward rotation angles, and the running clutch operation can also be performed synchronously.

9 and 10, the difference from the upper side is that the front-rear axis (10 ) is provided at the lower part, a cam (17) is provided integrally with the rotating piece (!1), and the upper arm part (14) and pin (18) are omitted. Axis (8), front-rear axis (
10), the cam pin (22), etc., are brought closer together.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partial front view, Fig. 2 is a partially cutaway side view, Fig. 3 is a partial front view, and Fig. 4 is a side view. , Fig. 5 is a mechanism diagram, Fig. 6 is a hydraulic circuit diagram, Fig. 7 is a transmission mechanism diagram, Fig. 8 is a side view, Fig. 9 is a front view of another embodiment, and Fig. 10 is its side view. be. In the figure, reference numeral (1) indicates a running clutch, (2) an operating lever, (3) a running brake, (4) an interlocking mechanism, and (5) a cam mechanism.

Claims (1)

[Claims] Between an operating lever (2) that tilts left and right to interlock the strike clutch (1) and an interlocking mechanism (4) that brakes the strike brake (3) when the strike clutch (1) is in the disengaged position. A strike operating device such as a combine harvester, which is provided with a cam mechanism (5) that is interlocked to operate the interlocking mechanism (4) in the tension direction and brake the strike brake (3).