JPH0725330B2 - Hydraulic device for spin turn in combine etc. - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hydraulic device for a spin turn in a combine or the like.

(Prior Art) Japanese Patent Laid-Open No. 62-292589, pages 5 and 5
In the figure, the oil supply path leading to the hydraulic left cylinder and the hydraulic right cylinder is divided into two parts, one for the hydraulic left cylinder and the hydraulic right cylinder, and the other for the hydraulic clutch body of the hydraulic reversing mechanism, and the left clutch It describes a configuration in which the hydraulic clutch body of the hydraulic reversing mechanism can be turned on at the same time that the body and the right clutch body are turned off.

The same technique as described above is also described in another known example, Japanese Utility Model Laid-Open No. 63-43981.

(Problems to be Solved by the Invention) A common drawback of the above-mentioned two known examples is that the oil supply path leading to the hydraulic left cylinder and the hydraulic right cylinder is divided into two, one for the hydraulic left cylinder and the hydraulic right cylinder, and the other for the other. Is that oil is fed to the hydraulic clutch body of the hydraulic reverse mechanism. Indeed, if the oil feed path is divided into two parts, one for the hydraulic left cylinder and the hydraulic right cylinder, and the other for the hydraulic clutch body of the hydraulic reverse mechanism, one of the oil feeds the left clutch body and the right clutch body. It seems that one of the clutch bodies can be disengaged and the other clutch can be used to turn on the hydraulic clutch body of the hydraulic reversing mechanism, but it is not perfect. The hydraulic clutch body of the hydraulic reversing mechanism may be turned on before either the left clutch body or the right clutch body is half cut.
May be mechanically locked.

In order to prevent this, it is necessary to configure the hydraulic path so that the hydraulic clutch body of the hydraulic reversing mechanism cannot be engaged unless either of the left and right clutch bodies is completely disengaged.

(Means for Solving the Problems) Accordingly, the present invention provides a left clutch body 20 and a right clutch body 21 that engage with and disengage from a center gear 15 that is rotated by the hydraulic continuously variable transmission 3, and the left and right clutches. Body 20, 21
Hydraulic left cylinder that engages and disengages the center gear 15
60 and a hydraulic right cylinder 61, and a hydraulic reverse mechanism 62 having a hydraulic clutch body 38 capable of rotating the left axle 33 and the right axle 34 of a combine or the like in the opposite direction, and the left clutch body 20 or the center clutch 15 from the left clutch body 20 or In a spin turn hydraulic device in a combine or the like configured such that the hydraulic clutch body 38 of the hydraulic reverse mechanism 62 is turned on after the right clutch body 21 is disengaged, in the hydraulic left cylinder 60 and the hydraulic right cylinder 61. Is the left clutch body 20 and the right clutch body 21
Is provided with an oil discharge duct 78 for discharging oil when the gear is turned off, and the hydraulic clutch body 38 is configured so that either one of the left and right clutch bodies 20, 21 is disengaged from the center gear 15 before being engaged. This is a hydraulic device for a spin turn in a combine or the like connected to the oil discharge duct 78.

Further, the present invention relates to a left clutch body that engages and disengages with the center gear 15 rotated by the hydraulic continuously variable transmission 3.
20 and a right clutch body 21, and a hydraulic left cylinder 60 for engaging and disengaging the left and right clutch bodies 20, 21 with the center gear 15.
And a hydraulic right cylinder 61, and a hydraulic reverse mechanism 62 having a hydraulic clutch body 38 that can rotate the left axle 33 and the right axle 34 of a combine or the like in the opposite direction, and the left clutch body 20 or the center gear 15 from the left clutch body 20 or the In the spin turn hydraulic device in a combine or the like configured such that the hydraulic clutch body 38 of the hydraulic reverse mechanism 62 is turned on after the right clutch body 21 is disengaged, the hydraulic left cylinder 60 and the hydraulic right cylinder 61 have An oil discharge duct 78 is provided for discharging oil when the left clutch body 20 and the right clutch body 21 are disengaged,
The hydraulic clutch body 38 is connected to the oil discharge duct 78,
The oil discharge duct 78 is connected to an oil return duct 75 extending to a sub chamber 73 of the hydraulic left cylinder 60 and a sub chamber 74 of the right cylinder 61, and one of the left and right clutch bodies 20 and 21 is connected to the center gear 15 When further disengaged, the hydraulic clutch body 38
The hydraulic left cylinder 60 and the right cylinder 61 are fixed by the return oil from the oil return duct 75 to provide a spin turn hydraulic device in a combine or the like.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings, in which 1 is a mission case such as a combine, in which an input shaft 2 is laterally installed at an upper position, and one end of the input shaft 2 is a hydraulic continuously variable transmission (hydrodynamic continuously variable transmission. A static transmission 3 is attached to the other end of the input shaft 2, and an output pulley 4 to the cutting portion is attached. The internal structure of the hydraulic continuously variable transmission 3 will be described later.
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. . Also, the middle gear 13 and the large gear 14
A fixed gear 16 that engages with the center gear 15 is fixed in the middle of.

Reference numeral 17 is 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 slidably provided with a left clutch body 20 that can be engaged and disengaged with respect to the left inner tooth 18, and a right clutch body 21 that can be engaged and disengaged with respect to the right inner tooth 19. Reference numerals 20a and 21a are left and right gears with which the left and right internal teeth 18 and 19 mesh, and the left and right gears 20a and 21a are formed to have a width that protrudes outward even if they mesh with the left and right internal 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 the left disc 46 fixed to the mission case 1 side.
And a right disc 47 (FIG. 3), a left disc 50 and a right disc 51 which are respectively fixed to the left annular drum 48 and the right annular drum 49.

Left and right inner teeth 52 and 53 are integrally formed on the left and right annular drums 48, 49, respectively, and the left and right inner teeth 52, 53 are provided outside the left and right gears 20a, 21a of the left and right clutch bodies 20, 21. Left gear formed
54 and the right gear 55 mesh.

The left and right clutch bodies 20 and 21 are disengaged from the left and right internal teeth 18 and 19 by moving the left and right shifters 24 and 25 in the outward direction of the shaft, and further left and right, the left and right annular drums 48. , 49, and presses the left and right annular drums 48, 49, respectively, so that the left and right disks 50, 51 are brought into contact with the left and right disks 46, 47.
Apply pressure to each to activate the left and right brakes. In the left gear 20a and the right gear 21a of the left and right clutch bodies 20, 21,
The left reduction gear 28 and the right reduction gear 29 mesh with each other. Reference numeral 30 denotes a reduction shaft of the left reduction gear 28 and the right reduction gear 29. The left small reduction gear 31 is fixed to the outside of the left reduction gear 28, and the right small reduction gear 32 is fixed to the outside of the right reduction gear 29. In the vicinity of the reduction shaft 30,
The left axle 33 and the right axle 34 are mounted. A left drive gear 35 that meshes with the left reduction gear 31 is fixed to the left axle 33, and a right drive gear 36 that meshes with the right small reduction gear 32 is fixed to the right axle 34.

A clutch shaft 37 is mounted near the left and right axles 33, 34,
The clutch shaft 37 has a hydraulic clutch body 38 for spin turn.
To provide. The hydraulic clutch body 38 is composed of a fixed ring body 39 fixed to the clutch shaft 37 and a sliding ring body 40 loosely fitted to the clutch shaft 37.
And the sliding ring 40 are frictionally coupled to rotate integrally. A gear 41 is integrally formed on the sliding ring 40, and the gear 41 is meshed with the right drive gear 36.

An intermediate gear 42 is fixed to the right side of the clutch shaft 37. A counter shaft 43 is provided in the vicinity of the clutch shaft 37, and a left intermediate gear that meshes with the left drive gear 35 is provided on the left side of the counter shaft 43.
A right intermediate gear 45, which meshes with the intermediate gear 42, is fixed to the counter shaft 43 on the right side of the counter shaft 43.

The transmission mechanism from the gear 41 meshed with the drive gear 36 to the left intermediate gear 44 meshed with the left drive gear 35 via the hydraulic clutch 38 serves as a hydraulic reverse mechanism 62 for spin turn.

FIG. 2 shows a hydraulic circuit for controlling the left and right clutch bodies 20 and 21 and the hydraulic clutch body 38. In the figure, 56 is an oil tank, 57 is a hydraulic pump, 58 is a relief valve, and 59 is a side valve. Clutch valve, 60 left cylinder, 61 right cylinder, 64 steering relief valve, 65 steering lever, 66 spin turn valve, 67 spin turn relief valve,
68 is a spin turn lever.

The steering lever 65 and the spin turn lever 68 are on the right side,
With a lever that can be switched between neutral and left "3 position", when the steering lever 65 is switched to the left and right, the side clutch valve 59 is switched to the left and right, and when the spin turn lever 68 is switched to the left and right, The side clutch valve
The spin turn valve 66 is switched to the right while the switch 59 is switched to the left and right.

The left and right cylinders 60 and 61 are double-acting cylinders. The main chamber 69 of the left cylinder 60 and the side clutch valve 59 are connected by the oil feed duct 70, and the main chamber 71 of the right cylinder 61 and the side clutch valve 59 are connected. And an oil return duct 75, and an oil return duct 75 is connected to each of the sub chambers 73 and 74.

Then, openings 76 and 77 are separately formed in the main chambers 69 and 71, and an oil discharge duct 78 is connected to the openings 76 and 77.
The openings 76 and 77 are normally closed from the inside by pistons 79 and 80, but the oil is sent to the main chambers 69 and 71 to disengage the left and right clutch bodies 20, 21 from the left and right inner teeth 18, 19. When the pistons 79, 80 move up to, the openings 76, 77 are formed so as to open.

Then, the openings 76, 77 are opened, and the oil discharge duct 78 is opened.
The hydraulic clutch body 38 is connected to the oil discharge duct 78 so that the hydraulic clutch body 38 is turned on for the first time when the oil is drained.

Further, the oil return duct 75 connected to each of the sub chambers 73, 74 is connected to the oil discharge duct 78 so as to fix the movement of the pistons 79, 80.

(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 changed from the large gear 5, the middle gear 6, and the small gear 7 to the small gear 12, the middle gear 13, and the large gear 14. Is transmitted to either of the two to rotate the intermediate shaft 11, and rotate the center gear 15 via the fixed gear 16 fixed to the intermediate shaft 11.

The center gear 15 has left and right inner teeth 18, 19 with a left and right clutch body.
Since 20 and 21 mesh with each other in the disengaged state, the left and right reduction gears 28 and 29 rotate via the left and right clutch bodies 20 and 21, and the left and right small reduction gears 31 fixed to the left and right reduction gears 28 and 29, 32 rotates, the left and right drive gears 35 and 36 that are constantly meshed with the left and right small reduction gears 31 and 32 rotate, and the left and right axles 33 and 34 rotate and travel.

In the above state, since the hydraulic clutch body 38 is not under the hydraulic pressure, the fixed ring body 39 and the sliding ring body 40 are idling.

Then, in this state, spin turn the aircraft (left axle 33
And the right axle 34 are rotated in the opposite direction and turned on the spot), the spin turn lever 68 of FIG. 2 is used.
To the left or right. That is, for example, when the spin turn lever 68 is tilted to the left, the side clutch valve 59 moves to the right, the spin turn valve 66 moves to the left, and the hydraulic pump 57 feeds oil to the main chamber 69 of the left cylinder 60, Piston 79
Extend the axis of. Then, the left clutch body 20 moves to the left side in FIG. 1 via the left shifter 24, and the engagement between the left clutch body 20 and the left internal teeth 18 is released. Further, when the shaft of the piston 79 extends to a position where the left clutch body 20 is disengaged from the left internal tooth 18, the opening 76 is opened, so that the oil in the main chamber 69 is discharged from the oil discharge duct 78, the steering relief valve 64, and the spin turn. Oil is sent to the hydraulic clutch body 38 via the valve 66.

When hydraulic pressure is applied to the hydraulic clutch body 38, the fixed ring body 39 of the hydraulic clutch body 38 and the sliding ring body 40 are in pressure contact with each other, and in this state, the sliding ring body 40 that meshes with the right drive gear 36 and rotates. Is transmitted to the fixed ring body 39, the clutch shaft 37 is rotated, and the intermediate gear
42, rotate the counter shaft 43 via the right intermediate gear 45,
The left intermediate gear 44 fixed to the counter shaft 43 is rotated.
Since the left intermediate gear 44 is engaged with the left drive gear 35, the left drive gear 35 rotates and rotates the left axle 33 in the direction opposite to the right axle 34. Therefore, the aircraft spin-turns.

Thus, when the aircraft spins as described above, the left drive gear 35 rotates in the opposite direction to that during normal traveling, but the hydraulic clutch body 38 that transmits the reverse rotation to the left drive gear 35 does not move to the left. Cylinder 60 piston 79 is left clutch body 20
Since they act after being disengaged from the left internal tooth 18, the normal rotation force for normal traveling and the reversal force for spin turns do not act on the left drive gear 35 at the same time.

Then, during the spin turn, a part of the hydraulic pressure applied to the hydraulic clutch body 38 is passed through the oil return duct 75 to the left cylinder 60.
The piston 79 acts on the sub-chamber 73 of the left clutch body 20.
When is released from the left internal tooth 18 and the opening 76 is opened, it stops in place and does not extend any more. Therefore, the left clutch body 20 only disengages from the left internal tooth 18, and the left brake body 20 is released.
Do not move to the position where 26 is activated.

(Effect) A common drawback of the above-described two known examples is that the oil supply path leading to the hydraulic left cylinder and the hydraulic right cylinder is divided into two, one is the hydraulic left cylinder and the hydraulic right cylinder, and the other is the hydraulic reverse mechanism. The point is that oil is sent to the hydraulic clutch body.
Indeed, if the oil feed path is divided into two parts, one for the hydraulic left cylinder and the hydraulic right cylinder, and the other for the hydraulic clutch body of the hydraulic reverse mechanism, one of the oil feeds the left clutch body and the right clutch body. It seems that one of the clutch bodies can be disengaged and the other clutch can be used to turn on the hydraulic clutch body of the hydraulic reversing mechanism, but it is not perfect. The hydraulic clutch body of the hydraulic reversing mechanism may be turned on while either the left clutch body or the right clutch body is still half cut, and mechanical locking may occur.

However, according to the present invention, the left clutch body 20 and the right clutch body 21, which engage with and disengage from the center gear 15 rotated by the hydraulic continuously variable transmission 3, and the left and right clutch bodies 20,
A hydraulic left cylinder 60 and a hydraulic right cylinder 61 that engage and disengage 21 with the center gear 15, and a left axle 33 such as a combine.
And a hydraulic reversing mechanism 62 having a hydraulic clutch body 38 capable of rotating the right axle 34 in the opposite direction, and the hydraulic reversing mechanism after the left clutch body 20 or the right clutch body 21 is disengaged from the center gear 15. In the hydraulic device for a spin turn in a combine or the like, in which the hydraulic clutch body 62 of 62 is turned on, the left clutch body 20 and the right clutch body are provided in the hydraulic left cylinder 60 and the hydraulic right cylinder 61.
An oil discharge duct 78 that discharges oil when 21 is turned off is provided, and the hydraulic clutch body 38 is turned on after either one of the left and right clutch bodies 20 and 21 is disengaged from the center gear 15. Since it is a hydraulic device for a spin turn in a combine or the like connected to the oil discharge duct 78, the hydraulic clutch body 38 is engaged only when one of the left and right clutch bodies 20 and 21 is not disengaged from the center gear 15. Since it does not become, it is prevented from being mechanically locked.

Further, the present invention relates to a left clutch body that engages and disengages with the center gear 15 rotated by the hydraulic continuously variable transmission 3.
20 and a right clutch body 21, and a hydraulic left cylinder 60 for engaging and disengaging the left and right clutch bodies 20, 21 with the center gear 15.
And a hydraulic right cylinder 61, and a hydraulic reverse mechanism 62 having a hydraulic clutch body 38 that can rotate the left axle 33 and the right axle 34 of a combine or the like in the opposite direction, and the left clutch body 20 or the center gear 15 from the left clutch body 20 or the In the spin turn hydraulic device in a combine or the like configured such that the hydraulic clutch body 38 of the hydraulic reverse mechanism 62 is turned on after the right clutch body 21 is disengaged, the hydraulic left cylinder 60 and the hydraulic right cylinder 61 have An oil discharge duct 78 is provided for discharging oil when the left clutch body 20 and the right clutch body 21 are disengaged,
The hydraulic clutch body 38 is connected to the oil discharge duct 78,
The oil discharge duct 78 is connected to an oil return duct 75 extending to a sub chamber 73 of the hydraulic left cylinder 60 and a sub chamber 74 of the right cylinder 61, and one of the left and right clutch bodies 20 and 21 is connected to the center gear 15 When further disengaged, the hydraulic clutch body 38
Since the hydraulic left cylinder 60 and the right cylinder 61 are fixed by the return oil from the oil return duct 75, it is a hydraulic device for a spin turn in a combine or the like. It is possible to prevent spinners and to make a smooth spin turn.

[Brief description of drawings]

FIG. 1 is a development view of a mission case, FIG. 2 is a hydraulic circuit diagram, and FIG. 3 is an enlarged view of a main part. 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, 21 …… Right clutch body, 20a …… Left gear, 21a …… Right gear, 22 …… Shifter groove, 23 …… Shifter groove, 24 ...... Left shifter, 25 ...
… Right shifter, 26 …… Left brake, 27 …… Right brake,
28 …… Left reduction gear, 29 …… Right reduction gear, 30 …… Reduction shaft,
31 …… Left small reduction gear, 32 …… Right small reduction gear, 33 …… Left axle, 34 …… Right axle, 35 …… Left drive gear, 36 …… Left drive gear, 37 …… Clutch shaft, 38… … Hydraulic clutch body, 39 ……
Fixed ring, 40 …… Sliding ring, 41 …… Gear, 42 …… Intermediate gear, 43 …… Counter shaft, 44 …… Left intermediate gear, 45 …… Right intermediate gear, 46 …… Disk, 47… … Disc, 48 …… Ring drum, 49 …… Ring drum, 50 …… Disc, 51 ……
Disc, 52 …… Internal teeth, 53 …… Internal teeth, 54 …… External teeth, 55…
… External teeth, 56 …… oil tank, 57 …… hydraulic pump, 58 …… relief valve, 59 …… side clutch valve, 60 …… left cylinder, 61 …… right cylinder, 64 …… steering relief valve, 65… … Steering lever, 66 …… Spin turn valve, 67
...... Spin turn relief valve, 68 …… Spin turn lever, 69 …… Main chamber, 70 …… Oil supply duct, 71 …… Main chamber,
72 …… oil supply duct, 73 …… sub chamber, 74 …… sub chamber, 75 …… oil return duct, 76 …… opening degree, 77 …… opening, 78 …… oil discharge duct, 79 …… piston, 80 ... Piston.

Claims (2)

[Claims] 1. A left clutch body 20 and a right clutch body 21, which engage and disengage with a center gear 15 rotated by a hydraulic continuously variable transmission 3, and the left and right clutch bodies 20, 21 in the center gear 15. The center gear 15 includes a hydraulic left cylinder 60 and a hydraulic right cylinder 61 that are engaged and disengaged, and a hydraulic reverse mechanism 62 having a hydraulic clutch body 38 that can rotate the left axle 33 and the right axle 34 such as a combine in the opposite direction. In a hydraulic device for a spin turn in a combine or the like configured so that the hydraulic clutch body 38 of the hydraulic reverse mechanism 62 is turned on after the left clutch body 20 or the right clutch body 21 is disengaged, the hydraulic left cylinder An oil discharge duct 78 for discharging oil when the left clutch body 20 and the right clutch body 21 are disengaged is provided in the hydraulic cylinder 60 and the hydraulic right cylinder 61. The left and right clutch bodies
A hydraulic device for a spin turn in a combine or the like, which is connected to the oil discharge duct 78 so that the units 20 and 21 come in after being separated from the center gear 15. 2. A left clutch body 20 and a right clutch body 21, which engage and disengage with a center gear 15 which is rotated by a hydraulic continuously variable transmission 3, and the left and right clutch bodies 20, 21 in the center gear 15. The center gear 15 includes a hydraulic left cylinder 60 and a hydraulic right cylinder 61 that are engaged and disengaged, and a hydraulic reverse mechanism 62 having a hydraulic clutch body 38 that can rotate the left axle 33 and the right axle 34 such as a combine in the opposite direction. In a hydraulic device for a spin turn in a combine or the like configured so that the hydraulic clutch body 38 of the hydraulic reverse mechanism 62 is turned on after the left clutch body 20 or the right clutch body 21 is disengaged, the hydraulic left cylinder An oil discharge duct 78 that discharges oil when the left clutch body 20 and the right clutch body 21 are disengaged is provided in the 60 and the hydraulic right cylinder 61, and the hydraulic clutch body 38 is used in the oil discharge duct. The oil return duct 75 is connected to the oil discharge duct 78 to the sub chamber 73 of the hydraulic left cylinder 60 and the sub chamber 74 of the right cylinder 61, and one of the left and right clutch bodies 20, When 21 disengages from the center gear 15, the hydraulic clutch body 38 is turned on, and the hydraulic left cylinder 60 and the right cylinder 61 are fixed by the return oil from the oil return duct 75. Turn hydraulic system.