JPH0784181B2 - Controller for spin turn in combine etc. - Google Patents

Description

The present invention relates to a spin turn control device in a combine or the like.

(Prior Art) In the publicly known Japanese Utility Model Laid-Open No. 58-48567, a left clutch body and a right clutch body which are removably engaged with a center gear rotated by a hydraulic continuously variable transmission, and the clutch body are described above. It has a mechanism for connecting and disconnecting to the center gear and a hydraulic reverse mechanism having a hydraulic clutch body that can rotate the left axle and the right axle in opposite directions, and after the left clutch body or the right clutch body is disengaged from the center gear, A control device for a spin turn in a combine or the like configured so that the hydraulic clutch body of the hydraulic reversing mechanism is turned on is described.

(Problems to be Solved by the Invention) With respect to the above-mentioned publicly known ones, the technique regarding the detailed configuration is not clear.

The present invention electrically detects the connection / disconnection between the left and right clutch bodies and the center gear, and thereby opens and closes the oil feed path of the hydraulic clutch body to ensure reliable operation with a simple configuration. Is.

(Means for Solving the Problem) Accordingly, the present invention is directed to a left clutch body 20 and a right clutch body 21, which are removably engaged with a center gear 15 rotated by a hydraulic continuously variable transmission 3, and the left and right clutch bodies 20, A hydraulic left cylinder 62 and a right cylinder 63 for connecting and disconnecting 21 to and from the center gear 15, and a hydraulic reverse mechanism 56 having a hydraulic clutch body 48 capable of rotating the left axle 43 and the right axle 44 in opposite directions,
In a spin turn control device in a combine or the like configured such that the hydraulic clutch body 48 of the hydraulic reverse mechanism 56 is turned on after the left clutch body 20 or the right clutch body 21 is disengaged from the center gear 15, In the vicinity of the left and right clutch bodies 20, 21, the left and right clutch bodies 20,
A spin turn solenoid of a spin turn valve 66 for providing a left clutch disengagement detection switch 69 and a right clutch disengagement detection switch 70, which are turned on when 21 disengages from the center gear 15, and opens and closes an oil feeding path of the hydraulic clutch body 48.
Reference numeral 73 denotes a spin turn control device in a combine or the like configured to be energized via the left clutch disengagement detection switch 69 or the right clutch disengagement detection switch 70.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. 1 is a mission case such as a combine, in which an input shaft 2 is laterally provided at an upper position, and one end of the input shaft 2 is a hydraulic continuously variable transmission ( A hydrostatic transmission 3 is attached, and an output pulley 4 reaching the cutting portion is attached to the other end of the input shaft 2.

A switching gear group 8 including a large gear 5, a middle gear 6, and a small gear 7 is slidably fitted in the input shaft 2 in the axial direction, and a shifter 9 is engaged with the switching gear group 8. 10 is shifter 9
It is a shifter shaft equipped with.

Reference numeral 11 denotes an intermediate shaft, and a small gear 12 meshing with the large gear 5, a middle gear 13 meshing with the middle gear 6, and a large gear 14 meshing with the small gear 7 are fixed to the intermediate shaft 11, respectively. . A fixed gear 16 that engages with the center gear 15 is fixed between the middle gear 13 and the large gear 14.

Reference numeral 17 denotes a side clutch shaft, and the center gear 15 is loosely fitted in the center position of the side clutch shaft 17 only for rotation.

Left inner teeth 18 and right inner teeth 19 are formed on both sides of the center gear 15, respectively. The side clutch shaft 17 is provided with a left clutch body 20 which can be connected / disconnected with respect to the left inner tooth 18, and a right clutch body 21 which can be freely connected / disconnected with respect to the right inner tooth 19, respectively.
Reference numerals 20a and 21a are tooth portions that mesh with the left and right inner teeth 18 and 19, and the tooth portions 20a and 21a are formed to have a width that protrudes outward even if they mesh with the left and right inner teeth 18 and 19.

22 is a shifter groove formed in the left clutch body 20, 23 is a shifter groove formed in the right clutch body 21,
A left shifter 24 is engaged with 22 and a right shifter 25 is engaged with the shifter groove 23.

A left brake 26 and a right brake 27 are provided outside the left and right clutch bodies 20 and 21, respectively. Left and right brakes 26, 27
Is formed of a left disc 28 and a right disc 29 (FIG. 2) fixed to the mission case 1, a left disc 32 and a right disc 33 fixed to the left annular drum 30 and the right annular drum 31, respectively.

Left and right inner teeth 34 and 35 are integrally formed on the left and right annular drums 30 and 31, respectively, and the left and right inner teeth 34 and 35 are provided outside the left and right tooth portions 20a and 21a of the left and right clutch bodies 20 and 21, respectively. The left outer tooth 36 and the right outer tooth 37 formed on the above are meshed with each other.

The left and right clutch bodies 20 and 21 are disengaged from the left and right inner teeth 18 and 19 when moved in the axial direction by the operation of the left and right shifters 24 and 25.
The right and left annular drums 30 and 31 are pressed against the left and right circular drums 30 and 31, respectively, and the left and right discs 32 and 33 are brought into pressure contact with the left and right discs 28 and 29, respectively, to operate the left and right brakes.

The left tooth portion 20a and the right tooth portion 21a of the left and right latch bodies 20, 21 are
The left reduction gear 38 and the right reduction gear 39 mesh with each other. Reference numeral 40 is a reduction shaft of the left reduction gear 38 and the right reduction gear 39.

The left small reduction gear 41 is fixed to the outside of the left reduction gear 38, and the right small reduction gear 42 is fixed to the outside of the right reduction gear 39.

A left axle 43 and a right axle 44 are mounted near the reduction shaft 40. A left drive gear 45 meshing with the left small reduction gear 41 is fixed to the left axle 43, and a right drive gear 46 meshing with the right small reduction gear 42 is fixed to the right axle 44.

A clutch shaft 47 is mounted near the left and right axles 43, 44,
The clutch shaft 47 has a hydraulic clutch body 48 for spin turn.
To provide. The hydraulic clutch body 48 is formed by one side 49 fixed to the clutch shaft 47 and the other side 50 loosely fitted to the clutch shaft 47, and when hydraulic pressure acts, the one side 49 and the other side 50 are connected. It is done and it rotates integrally.

A gear 51 is integrally formed on the other side 50, and the gear 51 is meshed with the right drive gear 46.

An intermediate gear 52 is fixed to the right side of the clutch shaft 47. A counter shaft 53 is provided near the clutch shaft 47, and a left intermediate gear that meshes with the left drive gear 45 is provided on the left side of the counter shaft 53.
54, and a right intermediate gear 55 that meshes with the intermediate gear 52 is fixed to the right side of the counter shaft 53.

The transmission mechanism from the gear 51 meshed with the right drive gear 46 to the left intermediate gear meshed with the left drive gear 45 via the hydraulic clutch 48 serves as a hydraulic reverse mechanism 56 for spin turn.

FIG. 3 shows a hydraulic circuit for controlling the left and right clutch bodies 20, 21 and the hydraulic clutch body 48. In the figure, 57 is an oil tank, 58 is a hydraulic pump, 59 is a relief valve, and 60 is a side valve. Clutch valve, 61 unload valve, 62 left cylinder, 63 right cylinder, 64 steering relief valve,
65 is a steering lever, 66 is a spin turn valve, 67 is a spin turn relief valve, 68 is a spin turn lever, and 69 is a left clutch disengagement detection switch that is turned on when the left clutch body 20 disengages from the left internal tooth 18 of the center gear 15. , 70 turns on when the right clutch body 21 disengages from the right internal tooth 19 of the center gear 15.
Is a right clutch disengagement detection switch, 71 is a left side clutch solenoid that moves the side clutch valve 60 to the right,
72 is a right side clutch solenoid that moves the side clutch valve 60 to the left, 73 is a spin turn solenoid that moves the spin turn valve 66 to the left, and 74 is an unload solenoid that moves the unload valve 61 to the left.

The left and right cylinders 62 and 63 are double-acting cylinders. The main chamber 75 of the left cylinder 62 and the side clutch valve 60 are connected by the oil feed duct 76, and the main chamber 77 of the right cylinder 63 and the side clutch valve 60 are connected. And an oil return duct 81, and an oil return duct 81 is connected to each of the sub chambers 79 and 80.

Therefore, separate openings 82 and 83 are formed in the main chambers 75 and 77, respectively, and the openings 82 and 83 are connected to the spin turn valve 66 through the oil discharge duct 84. The openings 82 and 83 are normally closed from the inside by pistons 85 and 86, but oil is sent to the main chambers 75 and 77 to the position where the left and right clutch bodies 20, 21 are disengaged from the left and right inner teeth 18, 19. When the pistons 85, 86 move, the openings 82, 83 are formed so as to open.

The steering lever 65 and the spin turn lever 68 are levers that can be switched to the right, neutral, and left "3 positions".

FIG. 4 is an electric circuit diagram, and 87 is a relay 87 that is turned on when the steering lever 65 is tilted left and right. The relay contact 88 of the relay 87 is normally closed, but is opened when the relay 87 is turned on. To be done. 89 is a delay circuit, spinter lever 68
Left side clutch solenoid 71 energized by operating
Alternatively, the right side clutch solenoid 72 is further energized for about 1.2 seconds after the spin turn lever 68 returns to the neutral position.

The left clutch disengagement detection switch 69 and the right clutch disengagement detection switch 70 are shown in FIG.
Although it is described that 20 and 21 can be directly pressed by moving, in reality, the left and right clutch bodies 2
It is pressed by various link mechanisms that move 0 and 21.

(Operation) Next, the operation will be described.

The present invention is configured as described above, and in normal traveling, the rotation of the hydraulic continuously variable transmission 3 is transmitted through the switching gear group 8 to the small gear 1
2, transmitted to any of the middle gear 13 and the large gear 14 to rotate the intermediate shaft 11, and transmitted to the center gear 15 via the fixed gear 16 fixed to the intermediate shaft 11.

The left and right inner teeth 18, 19 of the center gear 15 have a left and right clutch body 2
Since 0 and 21 mesh, the left and right reduction gears 38 and 39 rotate via the left and right clutch bodies 20 and 21, and the left and right reduction gears 38 and 39
The left and right small reduction gears 41, 42 fixed to the right and left rotate, the left and right driving gears 45, 46 which are always meshed with the left and right small reduction gears 41, 42 rotate, and the left and right axles 43, 44 rotate to travel.

In the above, since the hydraulic clutch body 48 is not under hydraulic pressure, the one side 49 and the other side 50 are idling.

Then, in this state, spin turn the aircraft (left axle 43
And the right axle 44 are rotated in the opposite direction and turned on the spot), the spin turn lever 68 can be switched between the left and right. That is, the spin turn lever 68 is, for example,
When it is tilted to the left, the left side clutch solenoid 71 is energized, the side clutch valve 60 is switched to the left (right in the drawing), and the delay circuit 89 is the spin turn lever.
Detects that 68 has been tilted to the left. Side clutch valve
When 60 is switched, oil is sent to the main chamber 75 of the left cylinder 62, and the shaft of the piston 85 extends. Then, the left clutch body 20 moves to the left side in FIG. 1 through the left shifter 24, the engagement between the left clutch body 20 and the left internal tooth 18 is released, and the left clutch body 20 is detected by the left clutch disengagement detection switch 69. Press.

When the left clutch disengagement detection switch 69 is turned ON, the relay contact 88 is closed, so that the spin turn solenoid 73 is energized, the spin turn valve 66 is switched to the right side (left in the drawing), and the opening 82 Is opened, the hydraulic pressure from the hydraulic pump 58 is transmitted to the hydraulic clutch body 48.

When hydraulic pressure is applied to the hydraulic clutch body 48, one side 49 and the other side 50 of the hydraulic clutch body 48 come into pressure contact with each other, and in this state, the right drive gear 46
The rotation of the other side 50 that was meshing with and transmitted to the one side 49 is transmitted to the one side 49 to rotate the clutch shaft 47, and the intermediate gear 52 and the right intermediate gear.
Rotate the counter shaft 53 via 55, the counter shaft 53
The left intermediate gear 54 fixed to is rotated. Since the left intermediate gear 54 is engaged with the left drive gear 45, the left drive gear 45 rotates and rotates the left axle 43 in the opposite direction to the right axle 44. Therefore, the aircraft spin-turns.

Then, as described above, when the aircraft spin-turns, the left drive gear 45 rotates in the opposite direction to that during normal traveling, but the hydraulic clutch body 48 that transmits the opposite rotation to the left drive gear 45, Since the left clutch body 20 acts after turning off the left clutch disengagement detection switch 69 by disengaging from the left inner tooth 18, the normal driving force for normal traveling and the reversing force for spin turn are applied to the left drive gear 45. They do not work at the same time.

Then, after the spin turn, the spin turn lever 68
Spin turn solenoid 73 to OFF
Then, the hydraulic clutch body 48 is disengaged, and the reverse rotation of the left axle 43 is completed, but the left side clutch solenoid 71 is actuated by the delay circuit 89 to return the spin turn lever 68 to the neutral position. It is energized for a second. Therefore, the left axle 43 is in a free state for about 1.2 seconds after the reverse rotation transmitted through the hydraulic reverse mechanism 56 is disconnected, and then the forward rotation is transmitted through the left clutch body 20 to the left. A smooth spin turn can be performed without exerting an excessive force on the axle 43.

(Effect) As described above, according to the present invention, the left clutch body that is removably meshed with the center gear 15 that is rotated by the hydraulic continuously variable transmission 3.
20 and the right clutch body 21, and the left and right clutch bodies 20, 21
A hydraulic left cylinder 62 and a right cylinder 63 for connecting and disconnecting the center gear 15 to and from the center gear 15, and a hydraulic reverse mechanism 56 having a hydraulic clutch body 48 capable of rotating the left axle 43 and the right axle 44 in opposite directions. After the left clutch body 20 or the right clutch body 21 is disengaged from 15, the hydraulic reverse mechanism
In the spin turn control device in a combine or the like, which is configured such that the hydraulic clutch body 48 of 56 is turned on,
The left clutch disengagement detection switch 69 and the right clutch disengagement detection switch 70, which are turned on when the left and right clutch bodies 20, 21 are disengaged from the center gear 15, are provided in the vicinity of the left and right clutch bodies 20, 21. The spin turn solenoid 73 of the spin turn valve 66 that opens and closes the oil feeding path of 48 is configured to be energized via the left clutch disengagement detection switch 69 or the right clutch disengagement detection switch 70. Since the device is used, the forward rotation force for normal running and the reversal force for spin turn can be reliably prevented from simultaneously acting on one axle during a spin turn with a simple configuration.

[Brief description of drawings]

FIG. 1 is a development view of a mission case, FIG. 2 is an enlarged view of essential parts, FIG. 3 is a hydraulic circuit diagram, and FIG. 4 is an electric circuit diagram. Explanation of symbols 1 ... mission case, 2 ... input shaft, 3 ... hydraulic continuously variable transmission, 4 ... output pulley, 5 ... large gear, 6 ...
… Middle gear, 7 …… small gear, 8 …… switching gear group, 9 …… shifter, 10 …… shifter shaft, 11 …… intermediate shaft, 12 …… small gear, 13 …… middle gear, 14 …… large Gears, 15 …… Center gear, 16 …… Fixed gear, 17 …… Side clutch shaft, 18 ……
Left internal tooth, 19 …… Right internal tooth, 20 …… Left clutch body, 20a ……
Tooth, 21 …… Right clutch body, 21a …… Tooth, 22 …… Shifter groove, 23 …… Shifter groove, 24 …… Left shifter, 25 ……
Right shifter, 26 …… Left brake, 27 …… Right brake, 28
…… Disc, 29 …… Disc, 30 …… Ring drum, 31
...... Ring drum, 32 …… Disc, 33 …… Disc, 34
…… Internal teeth, 35 …… Internal teeth, 36 …… External teeth, 37 …… External teeth, 38…
… Left reduction gear, 39 …… Right reduction gear, 40 …… Reduction shaft, 41…
… Left small reduction gear, 42 …… Right small reduction gear, 43 …… Left axle,
44 …… Right axle, 45 …… Left drive gear, 46 …… Right drive gear,
47 …… Clutch shaft, 48 …… Hydraulic clutch body, 49 …… One side, 50 …… Other side, 51 …… Gear, 52 …… Intermediate gear, 53 ……
Counter shaft, 54 …… left intermediate gear, 55 …… right intermediate gear,
56 …… hydraulic reversing mechanism, 57 …… oil tank, 58 …… hydraulic pump, 59 …… relief valve, 60 …… side clutch valve, 61 …… unload valve, 62 …… left cylinder, 63
…… Right cylinder, 64 …… Steering relief valve, 65 …… Steering lever, 66 …… Spin turn valve, 67 …… Spin turn relief valve, 68 …… Spin turn lever, 69…
… Left clutch disengagement detection switch, 70 …… Right clutch disengagement detection switch, 71 …… Left side clutch solenoid, 72
…… Right side clutch solenoid, 73 …… Spin turn solenoid, 74 …… Unload solenoid, 75 …… Main chamber, 76 …… Oil supply duct, 77 …… Main chamber, 78 …… Oil supply duct, 79, 80 …… Sub chamber, 81 …… Oil return duct, 82, 83 ……
Opening, 84 ... Oil discharge duct, 85, 86 ... Piston, 87
…… Relay, 88 …… Relay contact, 89 …… Delay circuit.

Claims (1)

[Claims] 1. A left clutch body 20 and a right clutch body 21, which mesh with a center gear 15 which is rotated by a hydraulic continuously variable transmission 3 so as to be disengageable, and the left and right clutch bodies 20, 21 are successively disengaged from the center gear 15. And a hydraulic reverse mechanism 56 having a hydraulic clutch body 48 capable of rotating the left axle 43 and the right axle 44 in opposite directions, and the left clutch body 20 from the center gear 15 or In the spin turn control device in a combine or the like configured such that the hydraulic clutch body 48 of the hydraulic reversing mechanism 56 is turned on after the right clutch body 21 is disengaged, in a position near the left and right clutch bodies 20, 21. A left clutch disengagement detection switch 69 and a right clutch disengagement detection switch that are turned on when the left and right clutch bodies 20 and 21 are disengaged from the center gear 15.
A spin turn solenoid 73 of a spin turn valve 66 that is provided with 70 and opens and closes the oil supply path of the hydraulic clutch body 48.
Is a control device for spin turns in a combine or the like configured to be energized via the left clutch disengagement detection switch 69 or the right clutch disengagement detection switch 70.