JPH089338B2 - Rapid turning control device such as combine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rapid turning control device for combine harvesters and the like, and can be used for an outer seedling planting machine for combine harvesters and the like.

2. Description of the Related Art A steering clutch that turns on and off the transmission from the prime mover to the left and right traveling devices is provided, and after turning off this steering clutch, the transmission to the one side traveling device is cut off, and then the one side traveling device is reversed. Rotation is controlled in the opposite direction via the mechanism, and the left and right traveling devices are rotated in the forward and reverse directions to rapidly turn the vehicle body. A delay timer is provided so that the steering clutch is turned on after a predetermined time has elapsed after making the sudden turn, and the traveling device on the one side is rotationally transmitted in the forward direction.

SUMMARY OF THE INVENTION As described above, in the sudden turning control device, the delay timer is activated after the rapid turning of the vehicle body is finished, and the reverse rotation transmission to the traveling device on one side is cut off for a predetermined time. After that, the steering clutch is turned on to transmit the rotation in the forward direction, and smooth sudden turning control can be performed so that an unreasonable load does not act on the traveling transmission system.

However, when the delay timer does not operate, the steering clutch is turned on immediately after the sharp turn control ends,
Since the rotational drive in the forward direction is performed on the traveling device on the one side that has been reversely rotationally transmitted, an unreasonable force may act on the transmission path to the traveling device, resulting in damage.

Therefore, the present invention provides a protection circuit for the delay timer so that the sudden turning control is not performed when the delay timer becomes inoperative.

Means for Solving the Problems The present invention is directed to a left and right steering clutches 2, 2 provided in a power transmission path from a prime mover side to left and right traveling devices 1, 1.
And a power steering lever 57 for electrically turning on / off the steering clutches 2, 2 and braking the clutch on the disengagement side, and turning on / off of the hydraulic clutch 3 transmits reverse rotational power to the traveling devices 1, 1. In relation to the reversing mechanism 4 that can be performed, the turning lever 6 that can electrically turn on and off the traveling clutches 2, 2 and the hydraulic clutch 3, and the detection of the turning operation of the turning lever 6 and the detection of the neutral position return. Delay timer 7 to operate
And the forward rotation power is transmitted to the traveling device 1 which is operated in association with the switching of the delay timer OFF operation and which is reversely rotated by the reverse rotation mechanism 4 on the disengagement side of the steering clutch 2 after a predetermined time has elapsed. Delaying forward rotation power transmission means, a swing solenoid 65 that operates the hydraulic clutch 3, an electromagnetic relay 8 that turns the swing solenoid 65 ON / OFF, and the swing solenoid 65 that does not operate when the delay timer 7 is inactive. The reverse turning mechanism inoperative electric circuit having the electromagnetic relay 8 to be in an operating state is configured as a quick turn control device such as a combine.

Effect of the Invention When the turning lever (6) is turned, the steering clutch (2) is disengaged, and the transmission to the traveling device (1) on one side is cut off. The turning operation of the turning lever (6) is detected by the delay timer (7), and when the disengagement of the steering clutch (2) is detected, the hydraulic clutch (3) is turned on via the electromagnetic relay (8). The reverse rotation mechanism (4) is activated, and the traveling device (1) on the disengaged side of the steering clutch (2) is transmission-rotated in the reverse direction. In this way, the left and right traveling devices (1) rotate in mutually opposite directions and the vehicle body (5) makes a sharp turn.

When the turning lever (6) is returned to the neutral position, the delay timer (7) operates and the disengaged state of the steering clutch (2) is maintained for a short predetermined time. Therefore, the traveling device (1) on the one side, after the reverse rotation transmitted through the reverse rotation mechanism (4) is cut off,
It is in a free state for a short predetermined time, and thereafter, the rotation in the forward direction is transmitted, so that a smooth sharp turn can be performed without exerting an unreasonable force on the transmission path to the traveling device (1).

When the delay timer (7) does not operate, the steering clutch (2) is disengaged when the turning lever (6) is turned, but the electromagnetic lever (8) is actuated due to the inactivity of the delay timer (7) to change the hydraulic pressure. Since the clutch (3) does not operate, the reverse rotation mechanism (4) does not work, and a sharp turn is not performed.

As described above, the reverse rotation mechanism (4) is activated by detecting the disengagement of the steering clutch (2) and turning on the hydraulic clutch (3), and when the delay timer (7) is not activated, the reverse rotation mechanism ( Since the electromagnetic relay (8) is provided so as not to operate 4), a sharp turn is impossible.

Therefore, when the turning is completed and the turning lever (6) is returned to the neutral position, the delay timer (7) does not operate, and the traveling device (1) rotationally operated in the opposite direction disconnects the reverse rotation transmission. Since the steering clutch (2) does not enter immediately after being turned on and is not transmitted in the normal direction, it is possible to prevent the transmission path to the traveling device (1) from being disturbed or damaged.

Example In the illustrated example, the combine is a left and right traveling device (1).
A shelling device (9) is mounted on a car body (5) having a blade, and a cutting blade device (10) is provided at the front part, and an auger (11) for scraping and collecting the shell culms cut by the cutting blade device (10) , A cutting device (13) equipped with a transfer device (19) that inherits the cutting culm scraped and collected by the auger (11) and transfers the cutting culm to the shelling device (9) above the rear part of the hydraulic cylinder. Is provided so that it can be raised and lowered with respect to the vehicle body (5). Above the front part of the cutting blade device (10), a take-up reel (16) that engages a shell and scrapes backward while rotating around a reel shaft (15) along the cutting width direction is provided on a reel arm (17). ) Supported by a hydraulic cylinder (1
The cutting blade device (10) is movable on the reel arm (17) in the front-rear direction by expansion and contraction of 8).
The reel arm (17) is vertically swingable around the support shaft (14) due to expansion and contraction of the cylinder (12).

The transfer device (19) is configured to be belt-transmitted from the prime mover side, and the lower input drive shaft (20) extends from the upper input shaft (20) along the outside of the transfer case (22) in which the transfer device (19) is housed. The drive shaft (24) transmits the auger (11), and the cutting blade device (10) transmits the chain.

A floating pulley (2) that is belt-driven from the auger (11).
The reel shaft (15) of the take-in reel (16) is chain-transmitted via a drive sprocket (21) integrated with (3). Between the reel sprocket (25) of the reel shaft (15) and the drive sprocket (21), the tension roller (26) and the tension sprocket (28) at the tip of the tension arm (28) swingable around the support shaft (27). 29) and a transmission chain (30) tensioned by. The tension sprocket (29) maintains the transmission chain (30) in a proper tension state when the reel shaft (15) moves on the reel arm (17) in the front-rear direction due to the expansion and contraction of the hydraulic cylinder (18). Is configured.

A connecting rod (32) is integrally provided on a reel shaft boss (31) that slides on the reel arm (17), and a sliding rod (34) is integrally formed on a pin (33) of the tension sprocket (29). )
Is provided, the sliding rod 34 is removably fitted into the connecting rod (32), and the tension sprocket (29) is attached to the reel sprocket (25) in the direction in which the transmission chain (30) is stretched. A biasing tension spring (35) is provided so as to pass through the outer circumference of the sliding rod (34). (36) is an adjusting nut capable of adjusting the tension force. When the take-up reel (16) is moved in the front-back direction due to the expansion and contraction of the hydraulic cylinder (18), the tension chain (28) is rotated around the support shaft (27) by the transmission chain (30), and the transmission chain (16) is rotated. The tension spring (35) is used to maintain the tension of 30) at an appropriate tension.

At the front part of the vehicle body (5), there is provided a traveling transmission case (37) in which a traveling transmission device for transmitting power to the left and right traveling devices (1) by input transmission from a prime mover is installed.

An input shaft, a transmission shaft, a steering shaft (38) and a reduction shaft (43) are rotatably supported in the traveling transmission case (37). (39) is a steering shaft (38) that is speed-change transmitted from the prime mover side.
A center gear rotatably provided above the clutch gear (40) on the left and right sides of the center gear (39) so that the clutch gear (40) can slide on the steering shaft (38). The left and right inner teeth of (39) are configured to be engageable with and disengageable from each other, and these center gear (39) and clutch gear (40) constitute a steering clutch (2).
Steering brakes (41) are provided on the left and right outer sides of the clutch gear (40), and the clutch gear (40) is axially moved by a shifter (42) to disengage the steering clutch (2). When the steering clutch (2) is further moved outward from the disengaged position, the steering brake (41) is braked.

The left and right clutch gears (40) and the left and right reduction gears (44) that are constantly meshed are provided on the reduction shaft (43), and the traveling gear (46) that is always meshed with the gear (45) integrated with these reduction gears (44) is provided. It is provided on the left and right traveling shafts (47).

A clutch shaft (48) is rotatably supported in the vicinity of the left and right traveling shafts (47), and a hydraulic clutch (3) for rapid turning is provided on the clutch shaft (48). The hydraulic clutch (3) is composed of a fixed side with respect to the clutch shaft (48) and a free fitting side with which a gear (49) rotatable with respect to the shaft is integrated. The gear (49) rotates integrally with the clutch shaft (48). The gear (49) meshes with the right running gear (46).

An intermediate gear (50) is integrally provided on one side of the clutch shaft (48), and a counter gear (51) meshing with the intermediate gear (50) is integrally provided on the counter shaft (52). A counter gear (53) is integrally provided on the other side of the counter shaft (52), and the counter gear (53) and the left traveling gear (46) are meshed with each other.

In the reverse rotation mechanism (4), the traveling gear (46) on the disengagement side of the steering clutch (2) moves from the traveling gear (46) on the other side to the counter gear (51) by hydraulically operating the hydraulic clutch (3).
It is configured to be rotationally transmitted in the opposite direction via the (53), the intermediate gear (50), and the gear (49) of the hydraulic clutch (3).

Figure 2 is a hydraulic rotation diagram. Left and right clutch gears (40)
A clutch valve (55) is provided in the hydraulic circuit of the left and right steering cylinders (54) for rotating the shifter (42). In the left and right steering cylinders (54), the piston projects to rotate the shifter (42), the clutch gear (40) moves, and the meshing with the center gear (39) is released, that is, the steering clutch. (2) An oil passage (56) for communicating the left and right steering cylinders (54) with each other at the cut position to discharge oil is provided, and a flow control valve (58) operated by a power steering lever (57) is provided in the oil passage (56). ) And a rapid turning valve (59).
The sudden turning valve (59) and the hydraulic clutch (3) are connected by an oil passage.

The oil discharge passages (60) of the left and right steering cylinders (54) are provided with a hydraulic clutch (3) and a flow control valve (61) operated by a turning lever (6). The power steering lever (57) and the turning lever (6) are configured to be tiltable in the left and right directions from the neutral position. (62) is a hydraulic pump, and (63) is a relief valve.

FIG. 1 is an electric circuit diagram, which is provided with an electromagnetic relay (8) which is energized when the power steering lever (57) is tilted left and right. The relay contact (70) of this electromagnetic relay (8) is a normally closed type. When the disengaged positions of the left and right steering clutches (2) are detected
Switches (66) and (67) that turn on are provided respectively. Delay to energize the left clutch solenoid (68) or the right clutch solenoid (69) energized by operating the turning lever (6) for a short predetermined time after returning the turning lever (6) to the neutral position. A timer (7) is provided.

The electromagnetic relay (8) turns on the sudden turning valve (59) via the normally closed relay contact (70) when the switches (66, 67) for detecting the disengagement of the left and right steering clutches (2) are turned on. The turning solenoid (65) is energized, and when the delay timer (7) is inactive, the electromagnetic relay (8) is energized to open the normally closed relay contact (70), and the turning solenoid (65) is turned on. The circuit configuration does not energize.

In normal driving, when the speed is transmitted from the prime mover side to the center gear (39) of the steering shaft (38), the center gear (39) passes through the left and right clutch gears (40), the left and right reduction gears (44), and the gear ( 45) is transmitted and rotated, the left and right traveling gears (46) and the left and right traveling shafts (47) are transmitted, the traveling device (1) is transmission-driven, and the vehicle body (5) travels.

When the power steering lever (57) is tilted from the neutral position to the left, for example, the left clutch solenoid (68) is energized, the clutch valve (55) is switched, and the hydraulic pump (62) is switched.
The pressure oil from is supplied to the left steering cylinder (54), the piston expands, the left clutch gear (40) moves via the shifter (42), and the meshing with the center gear (39) is released. Left steering clutch (2) is disengaged and traveling device (1)
The transmission to the vehicle is cut off, and the traveling direction of the vehicle body (5) is corrected to the left.

When the power steering lever (57) is further tilted from the steering clutch (2) disengaged position, the flow control valve (58) is throttled to further extend the piston, and the clutch gear (40) moves via the shifter (42). The left steering brake (41) is actuated to brake the traveling device (1), and the vehicle body (5) turns left. When the power steering lever (57) is operated, the electromagnetic relay (8) is energized to open the normally closed relay contact (70). Therefore, even if the swing lever (6) is operated by mistake, the swing solenoid (6) is opened. 65) is not energized and the reverse mechanism (4) does not operate.

When the turning lever (6) is tilted to the left, for example, the left clutch solenoid (68) is energized and the clutch valve (5
5) is switched, and the delay timer (7) detects that the turning lever (6) has been operated. When the clutch valve (55) is switched, pressure oil is supplied to the left steering cylinder (54) and the piston extends. Then, the left clutch gear (40) moves via the shifter (42), the left steering clutch (2) is disengaged, and the transmission to the left traveling device (1) is cut off.

Switch (6 for detecting disengagement of the left steering clutch (2)
When 7) is turned on, the turning solenoid (65) is energized via the normally closed relay contact (70) of the electromagnetic relay (8), the rapid turning valve (59) is switched, and the pressure oil flows through the oil passage (56). It is then supplied to the hydraulic clutch (3).

When pressure oil is supplied to the hydraulic clutch (3), the fixed side and the loose fitting side of the hydraulic clutch (3) come into pressure contact with each other, and the clutch shaft (48) is engaged by the gear (49) meshing with the right traveling gear (46). ) Rotates, and the counter shaft (52) is rotated by transmission through the intermediate gear (50) and the counter gear (51). Then, the counter gear (53) at the other end of the counter shaft (52)
The left traveling gear (46) meshing with is reversely transmitted, the left traveling device (1) is rotated in the opposite direction to the right traveling device (1), and the vehicle body (5) makes a sharp turn.

When the turning lever (6) is returned to the neutral position after the sudden turning of the vehicle body (5) ends, the turning solenoid (65) is de-energized and the hydraulic clutch (3) is disengaged.
The left clutch solenoid (68) is energized for a short predetermined time even after the turning lever (6) is returned to the neutral position by the operation of the delay timer (7). Therefore, the left traveling device (1) becomes free state after the reverse rotation transmitted by the reverse rotation mechanism (5) is cut off, and then the rotation in the forward direction is transmitted, so that a smooth sharp turn can be performed.

When the delay timer (7) is inactive, when the delay timer (7) detects that the swing lever (6) is swung, the electromagnetic relay (8) is energized and the normally closed relay contact (70) is turned on. Since it is opened, the turning solenoid (65) is not energized.

In this way, when the delay timer (7) is inactive, the reverse rotation mechanism (4) is prevented from working, so that the steering clutch (2) is immediately engaged after the reverse travel of the traveling device (1) on one side is transmitted. As a result, normal rotation is not transmitted, and therefore, the transmission system to the traveling device (1) is not damaged, and smooth turning control can be smoothly performed.

[Brief description of drawings]

1 shows an embodiment of the present invention. FIG. 1 is an electric circuit diagram, FIG. 2 is a hydraulic circuit diagram, FIG. 3 is a partially sectional front view, and FIG. 4 is an overall side view of a combine. 5 is a partially enlarged side view thereof, and FIG. 6 is a partial plan view thereof. In the figure, reference numeral (1) denotes a traveling device, (2) denotes a steering clutch,
(3) is a hydraulic clutch, (4) is a reverse rotation mechanism, (5) is a vehicle body, (6) is a turning lever, (7) is a delay timer, and (8).
Indicates an electromagnetic relay.

Claims (1)

[Claims] 1. Left and right steering clutches 2, 2 provided in a power transmission path from a prime mover side to left and right traveling devices 1, 1.
And a power steering lever 57 for electrically turning on and off the steering clutches 2, 2 and braking the disengaged side clutch, and turning on and off the hydraulic clutch 3 transmits reverse rotational power to the traveling devices 1, 1. A reverse mechanism 4 capable of rotating, a swing lever 6 capable of electrically connecting and disconnecting the traveling clutches 2, 2 and the hydraulic clutch 3, and an operation related to detection of a swing operation of the swing lever 6 and detection of return to a neutral position. Delay timer 7 to
It operates in connection with the switching of the delay timer 7 to the OFF operation, and transmits the positive rotation power to the traveling device 1 on the side reversely rotated by the reverse rotation mechanism 4 on the disengagement side of the steering clutch 2 after a predetermined time has elapsed. Delayed forward rotation power transmission means, swing solenoid 65 that operates the hydraulic clutch 3, electromagnetic relay 8 that turns on and off the swing solenoid 65, and disables the swing solenoid 65 when the delay timer 7 is inactive. A rapid turning control device such as a combine, which comprises a reverse rotation mechanism inoperative electric circuit having the electromagnetic relay 8 for setting the state.