JPH0813663B2 - Side clutch device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a side clutch device for a working machine or the like.

(Prior Art) On page 3, line 8 and following pages of the conventionally known microfilm of Japanese Utility Model Laid-Open No. 62-2480, "Operation Brakes and Steering Clutch Devices are connected to the outside of the mission case. However, when the steering clutch is "disengaged", the steering brake is effective, and at the "contact" position of the steering clutch, a flexible mechanism that enables independent operation of the steering brake is provided inside the link. What I have "is described.

(Problems to be Solved by the Invention) The known steering brake device and steering clutch device are simply operable, and one of the left and right clutch bodies of the side clutch device is the left and right inner teeth of the center gear. When making a left turn, a right turn, or a spin turn by deviating from either one of the above, the other input left and right clutch bodies may also be disengaged from the left and right inner teeth of the center gear (meaning that they are easily disengaged). There was a problem that could not be done.

(Object of the Invention) When one of the left and right clutch bodies of the side clutch device is disengaged, the other engaged left and right clutch bodies are easily disengaged, but this is prevented.

(Means for Solving the Problem) Therefore, according to the present invention, the left side of the center gear 15 is slid in the axial direction with respect to the side clutch shaft 17 which is equipped with the center gear 15 rotated by the hydraulic continuously variable transmission 3. A left clutch body 20 having a tooth portion 20a that releasably meshes with an inner tooth 18, and a right inner tooth 19 of the center gear 15 that reciprocally meshes with the left clutch body 20 that axially slides with respect to the side clutch shaft 17. A right clutch body 21 having a tooth portion 21a is provided, and the left and right clutch bodies 2 are provided.
In a side clutch device capable of performing a left turn, a right turn, or a spin turn by setting either one of 0 and 21 to “on” and the other to “off”, the left and right clutch bodies 20 of the side clutch device are provided. , 21, the left and right clutch bodies 20, 21
Either one of the two slides to slide the tooth portion 20a or the tooth portion 21a.
The other side of the left and right clutch bodies 20 and 21 is a side clutch device provided with a slide fixing device 84 which is prevented from being disengaged while being engaged with the tooth portion 20a or the tooth portion 21a when further disengaged.

(Embodiment) The embodiment of the present invention will be described with reference to the drawings. 1 is a mission case such as a combine, 2 is an input shaft, 3 is a hydraulic continuously variable transmission (hydrostatic transmission) provided at one end of the input shaft 2. ) 4 is an output pulley which is provided at the other end of the input shaft 2 and reaches the cutting portion, 5 is a large gear provided on the input shaft 2, 6 is a middle gear, 7 is a small gear, and the large gear 5 and the middle gear A switching gear group 8 including a gear 6 and a small gear 7 is slidably fitted in the axial direction of the input shaft 2.

9 is a shifter of the switching gear group 8, 10 is a shifter shaft having the shifter 9 mounted thereon, 11 is an intermediate shaft, 12 is a small gear that meshes with the large gear 5, 13 is a middle gear that meshes with the middle gear 6,
Reference numeral 14 is a large gear that meshes with the small gear 7, and 16 is a fixed gear that engages with the center gear 15 of the side clutch shaft 17.

Thus, the left internal tooth 18 and the right internal tooth 19 are formed on both sides of the center gear 15, respectively. The side clutch shaft 17 has a left clutch body 20 that can be connected to and disengaged from the left inner tooth 18, and a right inner tooth 19
And a right clutch body (21) that can be connected and disconnected freely is provided so as to be slidable. 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, the shifter groove 22 is engaged with a left shifter 24, the shifter groove 23 has a right shifter 25. Engage.

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.

When the left and right clutch bodies 20 and 21 move in the axial direction against the elasticity of the spring 56 by operating the left and right shifters 24 and 25,
When the left and right inner teeth 18, 19 are disengaged and further moved outward, they come into contact with the left and right annular drums 30, 31 and press the left and right annular drums 30, 31, respectively, so that the left and right disks 32, 33 are moved to the left and right. The left and right brakes are operated by pressing the disks 28 and 29 respectively.

Then, the bases of the left and right shifters 24, 25 are
The shaft cylinders 70 and 71 are fixed to the shaft mounted on the mission case 1.
It is pivotally attached to 72, 73. The bases of the arms 74 and 75 are mounted on the barrels 70 and 71, respectively. The front end of the arm 78 on one side of the crank 76 faces the one surface of the front end of the arm 74, and the front end of the arm 80 on the other side of the crank 76 is the front end of the rod 82 of the left cylinder 61 that operates the left shifter 24. Bring it up. The front end of the arm 79 on one side of the crank 77 faces the one surface of the front end of the arm 75, and the front end of the arm 81 on the other side of the crank 77 is on the front end of the rod 83 of the right cylinder 62 that operates the right shifter 25. To face.

In the vicinity of the arms 74 and 75, a slide fixing device 84 which is engaged with the left and right clutch bodies 20 and 21 and the left and right inner teeth 18 and 19 of the center gear 15 and which does not come off while being engaged is provided.

The slide fixing device 84 is composed of solenoids 85 and 86 for stopping the rotation of the arms 74 and 75. Solenoid 85
Of the solenoid on the axis 87 of the arm 74.
86 faces the movement path of the axis 88 of the arm 75.

When the left and right clutch bodies 20, 21 are turned on, the solenoids 85, 86 electrically detect this and project. Therefore, even if a large load is applied to the left and right shifters 24 and 25 to move the arms 74 and 75 in the clutch disengaging direction in the axial direction, the left and right shifters 24 and 25 try to rotate. The shafts 87 and 88 of the arms 74 and 75 are solenoids 85 and 86.
The left and right clutch bodies 20 and 21 are kept in the engaged state by abutting against and mechanically disengaging.

That is, when one of the left and right clutch bodies 20, 21 is turned off like turning, the other on-state is maintained, and when one of the left and right clutch bodies 20, 21 is turned on like a spin turn,
This ON state is maintained.

38 is a left reduction gear that meshes with the left tooth portion 20a of the left clutch body 20, 39 is a right reduction gear that meshes with the right tooth portion 21a of the right clutch body 21, and 40 is a left reduction gear 38 and a right reduction gear 39. Reduction axis,
41 is a left small reduction gear provided on the reduction shaft 40, 42 is the same right small reduction gear, 43 is a left axle, 44 is a right axle, 45 is the left small reduction gear 41
Reference numeral 46 denotes a left drive gear that meshes with the right drive gear, and 46 denotes a right drive gear that meshes with the right small reduction gear 42.

A hydraulic clutch body 48 for spin turn is provided near the left and right axles 43, 44. 47 is a clutch shaft provided with a hydraulic clutch body 48, 49 is one side of the hydraulic clutch body 48, and 50 is the other side loosely fitted to the clutch shaft 47, and when hydraulic pressure acts,
The one side 49 and the other side 50 are coupled and integrally rotated.

51 is a gear on the other side 50, 52 is an intermediate gear, 53 is a counter shaft, 54 is a left intermediate gear that meshes with the left drive gear 45, and 55 is a right intermediate gear that meshes with the intermediate gear 52.

FIG. 4 shows a hydraulic circuit for controlling the left and right clutch bodies 20 and 21 and the hydraulic clutch body 48.
Is an oil tank, 58 is a hydraulic pump, 59 is a relief valve, 60
Is a side clutch valve, 63 is a steering relief valve, 64
Is a steering lever, 65 is a spin turn valve, 66 is a spin turn relief valve, and 67 is a spin turn lever.

5 to 7 show the second embodiment, and the slide fixing device 84 is composed of clutch disengagement prevention cylinders 89, 90.
Clutch disengagement prevention cylinders 89 and 90 are provided on the other surfaces of the arms 74 and 75, respectively, and when one of the left and right clutch bodies 20 and 21 is disengaged, the clutch disengagement prevention cylinder corresponding to the other engaged clutch body. The left and right clutches 89 and 90 mechanically prevent one of the arms 74 and 75 from turning in the disconnection direction by protruding and contacting the other surface side of one of the arms 74 and 75. The respective on-states of the bodies 20 and 21 are maintained.

That is, when one of the left and right clutch bodies 20, 21 is turned off like turning, the other on-state is maintained, and when one of the left and right clutch bodies 20, 21 is turned on like a spin turn,
This ON state is maintained.

FIGS. 8 to 10 show a third embodiment, in which the left and right cylinders 61 and 62 of the slide fixing device 84 are reciprocating cylinders, and the rod 82 and the crank 76 of the left cylinder 61 are arranged.
Of the right cylinder 62 and the arm 81 of the crank 77 are connected by a pin 92, and the tip of the arm 78 of the crank 76 and the tip of the arm 74 are connected by a rod 93. The tip of the arm 79 of the crank 77 and the tip of the arm 75 are connected by a rod 94.

(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 by the small gear 1 via the switching gear group 8.
2, the intermediate gear 13 and the large gear 14 are transmitted to the intermediate shaft 1
1 is rotated 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 left and right clutch bodies.
Since 20 and 21 are constantly meshed by the elasticity of the spring 56, the left and right reduction gears 38 and 39 rotate through the left and right clutch bodies 20 and 21, and the small left and right reduction gears 4 fixed to the left and right reduction gears 38 and 39
The left and right drive gears 45 and 46, which are constantly meshed with the left and right small reduction gears 41 and 42, rotate and the left and right axle shafts 43 and 44 rotate and travel.

Then, when turning the aircraft to the right, the right cylinder 62
Rod 83 of the crank 77 to push the arm 81 of the crank 77 to rotate the crank 77, the arm 79 of the crank 77 causes the arm 75 to rotate about the shaft 73, and the right clutch body 21 moves through the right shifter 25. 2 is moved to the right in FIG. 2 against the elasticity of the spring 56, and the engagement between the right clutch body 21 and the right internal tooth 19 is released.

On the other hand, in the left clutch body 20, since the rod 82 of the left cylinder 61 does not project, the crank 76 is in a freely rotatable state, and the elasticity of the spring 56 causes the left clutch body 20 to move to the right side in FIG. The left clutch body 20 and the left internal tooth 18 remain engaged. Then, since the rotation is transmitted only to the left crawler, it is possible to turn right.

Also, spin-turn the aircraft (rotate the left axle 43 and the right axle 44 in the opposite direction, and then turn right, for example).
Also, in the same manner as described above, the right clutch body 21 is disengaged, the left clutch body 20 is engaged, the hydraulic pressure is applied to the hydraulic clutch body 48, and the left axle 43 and the right axle 44 are rotated in opposite directions. Do it.

In this way, when turning the aircraft right or spin-turning right, one left clutch body 20 is turned on and the other right clutch body 21 is turned off. A large load is applied, the tooth portion 20a of the left clutch body 20 and the left internal tooth 18 are disengaged, and the turning or spin turn is stopped.

The present invention, the arm 74 for operating the left and right shifters 24, 25,
A slide fixing device 84 is provided near the arm 75, and the slide fixing device 84 is composed of solenoids 85 and 86.
For example, in the case of a right spin turn (right turn), the solenoid
When the 85 detects that the left clutch body 20 is on, it protrudes,
When the left clutch 20 is loaded and tries to move in the disengagement direction, the left shifter 24 rotates and the arm 74 causes the solenoid 85 to move.
The shaft 87 provided on the arm 74 contacts the solenoid 85.

Therefore, the turning of the left shifter 24 in the disengagement direction is mechanically prevented by the solenoid 85, and the left clutch body 20 is rotated.
Holds the ON state.

Similarly, in the case of a left turn or a left spin turn, the right clutch body 21 is set to “on” and the left clutch body 20 is set to “off”. Therefore, the right shifter 25 is rotated by the solenoid.
This is prevented by 86 and the engaged state of the right clutch body 21 is maintained.

That is, when one of the left and right clutch bodies 20, 21 is turned off like turning, the other on-state is maintained, and when one of the left and right clutch bodies 20, 21 is turned on like a spin turn,
This ON state is maintained.

In the second embodiment shown in FIGS. 5 to 7, the slide fixing device is used.
When 84 is composed of clutch disengagement prevention cylinders 89, 90, and in the case of right turn or right spin turn, the clutch disengagement prevention cylinder 89 contacts the arm 74 of the left shifter 24 of the left clutch body 20, so that the arm 74 is The left clutch body 20 is maintained in the engaged state by mechanically preventing it from turning in the disengagement direction. Similarly, the engaged state of the right clutch body 21 is also maintained.

8 to 10 show the left and right cylinders in the third embodiment.
61 and 62 use the return cylinder, the rod of the left cylinder 61
82 and the arm 80 of the crank 76 are connected by a pin 91, and the rod 83 of the right cylinder 62 and the arm 81 of the crank 77 are pinned.
Connected by 92, the tip of the arm 78 of the crank 76 and the arm
The tip of 74 is connected by the rod 93, and the tip of the arm 79 of the crank 77 and the tip of the arm 75 are connected by the rod 94, so the force that the left shifter 24 tries to rotate is
The force that prevents the right shifter 25 from rotating by the braking of the left cylinder 61 via the arm 74, the rod 93, the crank 76, and the pin 91 and the right force via the arm 75, the rod 94, the crank 77, and the pin 92 is applied. It can be prevented by braking the cylinder 62.

(Effect) The present invention is slidable in the axial direction with respect to the side clutch shaft 17 which is mounted with the center gear 15 which is rotated by the hydraulic continuously variable transmission 3 and is detachable from the left internal tooth 18 of the center gear 15. The left clutch body 20 having a tooth portion 20a that meshes with the center clutch and the side clutch shaft 17 that slides in the axial direction with respect to the center gear.
15 right inner teeth 19 and a right clutch body 21 having a tooth portion 21a that meshes with each other in a detachable manner are provided respectively, and one of the left and right clutch bodies 20 and 21 is "on" and the other is "off". In the side clutch device that can make a left turn, a right turn, or a spin turn, one of the left and right clutch bodies 20, 21 slides on the left and right clutch bodies 20, 21 of the side clutch device. Then, when it disengages from the tooth portion 20a or the tooth portion 21a, the other one of the left and right clutch bodies 20, 21 has a sliding fixing device 84 which does not disengage while engaging with the tooth portion 20a or the tooth portion 21a. Since the side clutch device is provided, either the left or right clutch body 20, 21 is engaged even if either one of the left and right clutch bodies 20, 21 is disengaged for left turn, right turn or spin turn. It does not come off as it is and prevents the defects of the known example.

[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 side view of FIG. 2, FIG. 4 is a hydraulic circuit diagram, and FIG.
FIGS. 7 to 7 are diagrams of the second embodiment, and FIGS. 8 to 10 are diagrams of the third embodiment. 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 inner tooth, 19 …… Right inner tooth, 20 …… Left clutch body, 21 …… Right clutch body, 20a, 21a …… Tooth, 22,23 …… Shifter groove, 24 …… Left shifter, 25 …… Right shifter, 26 …… Left brake, 27 …… Right brake, 28 …… Left disc, 29 ……
Right disc, 30 ...... left annular drum, 31 ...... right annular drum, 32 ...... left disc, 33 ...... right disc, 34 ...... left inner tooth, 35 ...... right inner tooth, 36 ...... left outer tooth, 37 ... right external tooth, 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 ... Spring, 57 ... Oil tank, 58 ... Hydraulic pump, 59 ...
… Relief valve, 60… Side clutch valve, 61…
… Left cylinder, 62 …… Right cylinder, 63 …… Steering relief valve, 64 …… Steering lever, 65 …… Spin turn valve, 66 …… Spin turn relief valve, 67 …… Spin turn lever, 70,71 …… Shaft cylinder, 72, 73 ... Shaft, 74, 75
…… Arm, 76,77 …… Crank, 78,79,80,81 ……
Arm, 82, 83 …… Rod, 84 …… Sliding fixing device, 85,
86 …… Sonoid, 87,88 …… Axis, 89,90 …… Clutch disengagement prevention cylinder, 91,92 …… Pin, 93,94 …… Rod.

Claims (1)

[Claims] 1. A side clutch shaft 17 axially mounting a center gear 15 which is rotated by a hydraulic continuously variable transmission 3 slides in an axial direction and meshes with a left internal tooth 18 of the center gear 15 in a removable manner. The left clutch body 20 having a tooth portion 20a, and the center gear that slides axially with respect to the side clutch shaft 17
15 right inner teeth 19 and a right clutch body 21 having a tooth portion 21a that meshes with each other in a detachable manner are provided respectively, and one of the left and right clutch bodies 20 and 21 is "on" and the other is "off". In the side clutch device that can make a left turn, a right turn, or a spin turn, one of the left and right clutch bodies 20, 21 slides on the left and right clutch bodies 20, 21 of the side clutch device. Then, when it disengages from the tooth portion 20a or the tooth portion 21a, the other one of the left and right clutch bodies 20, 21 has a sliding fixing device 84 which does not disengage while engaging with the tooth portion 20a or the tooth portion 21a. Side clutch device provided.