JP3505846B2 - Transmission of work equipment traveling equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission device for a traveling device of a working machine.

[0002]

2. Description of the Related Art Conventionally, an input shaft, an auxiliary transmission shaft, a left and right clutch for turning on / off transmission of rotation of the auxiliary transmission shaft to the left and right wheel shafts, and a pivot for turning the rotation transmitted to the left and right wheel shafts. A side clutch shaft with left and right brakes that enable turning, a reverse mechanism that reverses the left and right wheel shafts from each other, and a left and right wheel shafts inside It is well known that it is composed of a spin / deceleration drive turn switching transmission mechanism for switching and transmitting rotation for deceleration driving turn performed by driving and rotating the wheel shaft.

[0003]

The known example has a problem that the turning radius cannot be changed because the rotation ratio for transmission is set by the gear ratio of each transmission gear.

[0004]

OBJECT OF THE INVENTION Improvement of turning performance, simplification of mechanism, and low cost.

[0005]

According to the present invention, an input shaft 2 to which engine rotation is transmitted, left and right side clutches 12 for turning on and off the rotation transmitted from the input shaft 2 to the left and right wheel shafts 19, and left and right wheels. The left and right brakes 14 that brake one rotation transmitted to the shaft 19 to enable a pivoting turn to rotate, and the spin turns that reverse the left and right wheel shafts 19 from each other or the wheel shafts outside the turning of the left and right wheel shafts 19. A spin / deceleration drive tool that turns on and off the transmission of rotation for a deceleration drive turn by driving and rotating the wheel shaft on the inside of the turn at a predetermined deceleration ratio with respect to the number of revolutions .
Transmitting the transmission mechanism provided with a chromatography emissions clutch 21, during power transmission path from the input shaft 2 to the right and left of the spin reduction drive-turn clutch 21, for spin reduction drive Tha <br/> down Spin / deceleration drive unit that can change the speed of rotation
It is obtained by the transmission of the working machine driving apparatus provided with a down for transmission 33. According to the present invention, a spin / deceleration drive torque is applied to the side clutch shaft 8 provided with the left and right side clutches 12 .
The intermediate output transmission gear 38 is provided to drive the spin and deceleration.
Between the turn output transmission intermediate gear 38 and the input shaft 2,
A traveling device for a work machine provided with an output pulley 34 for spin / deceleration drive turns , a passive split pulley 35 whose diameter can be changed to change the number of revolutions, and a transmission 33 for spin / deceleration drive turns provided with a belt 36. It is a transmission device.

[0006]

Embodiments of the present invention will be described with reference to the drawings.
Is a mission case that transmits the rotation of the engine to a traveling device of a working machine such as a combine.
An input shaft 2 is provided on the upper part of the. The rotation of the engine is transmitted to the input shaft 2 directly or via a transmission (hydrostatic transmission or the like). 3 is a gear group slidably provided on the input shaft 2, 4 is a shifter, 5 is an auxiliary transmission shaft,
Reference numeral 6 denotes a gear group fixed to the auxiliary transmission shaft 5, and reference numeral 7 denotes a drive gear fixed to the auxiliary transmission shaft 5. A center gear 9 fixed to a side clutch shaft 8 is constantly meshed with the drive gear 7. Rotating bodies 10 fixed to the side clutch shaft 8 are provided on both right and left sides of the center gear 9, and left and right side clutch gears 11 slidably fitted to the side clutch shaft 8 are provided on the side portions of the rotating body 10. The left and right side clutches 12 are constituted by the clutch pawls provided on each side clutch gear 11 and the clutch pawls provided on the rotating body 10.

Left and right fixed drums 1313 are provided in the transmission cases 1 on the left and right sides of the side clutch shaft 8, and left and right brakes 14 are provided in the left and right fixed drums 13. The left and right brakes 14 are configured such that a rotating disk that rotates together with the side clutch gear 11 is slidably contacted with a fixed disk provided in the left and right fixed drum 13 so as to freely come into contact with and separate from the fixed disk. Reference numeral 15 is a shifter, which is the side clutch gear 11
And slide the rotating disk. Reference numeral 16 denotes a reduction shaft, and a first intermediate gear 17 that is always meshed with the side clutch gear 11 is loosely fitted in the reduction shaft 16 only for rotation, and a second intermediate gear 18 that integrally rotates is provided on the first intermediate gear 17. ,
A wheel gear 20 provided on the left and right wheel shafts 19 meshes with the second intermediate gear 18. Therefore, the turning is performed by decelerating a pivot turn (brake turn) that applies a brake to the rotation of the left or right crawler (not shown), and a predetermined deceleration with respect to the rotation speed of the crawler on the outer side of the left or right crawler. Depending on the ratio, it is possible to perform a deceleration drive turn performed by decelerating and rotating the crawler on the inside of the turn and a spin turn in which the left and right crawlers are reversed.

[0008] Therefore, in the transmission case 1 in the vicinity of the side clutch shaft 8, the spin-reduction drive-turn switching shaft 2 provided with a spin-reduction drive-turn clutch 21
2 is provided. Spin / deceleration drive turn clutch 21
The rotary drum 23 is fixed to the spin / deceleration drive turn switching shaft 22, and a rotary disk and a transmission disk that rotate integrally with the rotary drum 23 are provided in the rotary drum 23 so that they can be contacted and separated from each other. Further, the transmission disk is
Spin / deceleration drive loosely fitted to the switching shaft 22 for deceleration drive turn
It is provided so as to rotate integrally with the transmission turn transmission gear 24. In the vicinity of the spin reduction drive-turn switching shaft 22 is provided a spin-reduction drive-turn reduction shaft 25 for transmitting the rotation to the reduction shaft 16. Deceleration shaft 2 for spin / deceleration drive turns
The 5 loosely fitted to the spin reduction drive turns transfer gear 24 meshing with the spin-reduction drive-turn intermediate transmission gear 26, a third provided to rotate integrally with the spin speed reduction drive turns transfer gear 26 The first intermediate gear 17 is meshed with the intermediate gear 27.

[0009] Thus, the spin-reduction drive in the center of the spin-reduction drive-turn switching shaft 22 turns the switching gear 28
A slide / deceleration drive turn switching gear 2
8: Provide a deceleration drive turn passive gear 29 on one side to reduce the speed.
By fitting the spin / deceleration drive turn switching gear 28 into the recess formed in the drive turn passive gear 29, the deceleration rotation for the deceleration drive turn is transmitted to the spin / deceleration drive turn switching shaft 22. Further, a passive spin gear 30 is provided on the other side of the spin / deceleration drive turn switching gear 28 in a loosely fitted state, and the spin / deceleration drive turn switching gear 28 is provided in a recess formed in the passive spin gear 30. Is engaged, the reverse rotation for spin is transmitted to the spin / deceleration drive turn switching shaft 22. Therefore, the spin / deceleration drive turn switching gear 28 is slid by a shifter (not shown) to reduce the rotation.
Fast drive turn passive gear 29 or spin passive gear 3
Engage with either one of 0, spin turn and deceleration drive
Switch to dynamic turn .

[0010] Thus, during rotation transmission path for spin reduction drive turns, providing a spin-reduction drive-turn transmission 33. The input shaft 2 is provided with a spin / deceleration drive turn output pulley 34, the auxiliary transmission shaft 5 is provided with a passive split pulley 35, and a space between the spin / deceleration drive turn output pulley 34 and the passive split pulley 35 is provided. A belt 36 is wound around and the width of the passive split pulley 35 is changed (the diameter is changed) by an arbitrary mechanism to shift gears. The passive split pulley 35 provided so as to rotate integrally with the spin-reduction drive turns the output transmission gear 37, drive spin decelerated loosely fitted to the side clutch shaft 8 in the spin-reduction drive turns the output transmission gear 37
The dynamic turn output transmission intermediate gear 38 is engaged to spin
The deceleration drive turn output transmission intermediate gear 38 is always meshed with the deceleration drive turn passive gear 29. Also, spin / decrease
The high speed drive turn output transmission intermediate gear 38 has a first spin
The first intermediate gear 39 for spin is engaged with the intermediate gear 39.
Second intermediate gear 40 for spin provided so as to rotate integrally with
Is always meshed with the passive gear 30 for spin. Therefore, the spin / deceleration drive turn output transmission intermediate gear 38 is
The rotation decelerated to a predetermined deceleration ratio by the turning mode is transmitted, thereby rotating the wheel shaft 19 inside the turning.

FIG. 4 shows another embodiment, in which a large diameter large spin output transmission intermediate gear 38a fixed to the side clutch shaft 8 and a small diameter small diameter spin output transmission intermediate gear are provided on both left and right sides of the center gear 9. 38b is provided, and the left and right side clutches 12 are constituted by the clutch pawls provided on the respective side portions of the large diameter spin output transmission intermediate gear 38a and the small diameter spin output transmission intermediate gear 38b, and the clutch pawls provided on each side clutch gear 11. To do. The small diameter intermediate gear for spin 39a is engaged with the large diameter spin output transmission intermediate gear 38a, and the large diameter intermediate gear for spin 40a is engaged with the small diameter spin output transmission intermediate gear 38b.
9a and the large diameter intermediate gear 40a for spin are formed separately,
The small-diameter intermediate gear 39a for spin has a passive gear 30 for spin.
a is engaged with the large-diameter intermediate gear 40a for spinning and the passive gear 30b for spinning is engaged with the wheel shaft 19 on the outside of the turning.
And the reverse rotation ratio of the wheel shaft 19 on the inside of the turning is changed. Reference numeral 21a is a spin clutch, 22a is a spin switching shaft, 24a is a spin transmission gear, 25a is a spin reduction shaft, 26a is a spin transmission gear, and 28a is a spin rotation switching gear.

FIG. 7 shows another embodiment of the present invention, in which a reduction gear fixed to the side clutch shaft 8 is provided on one of the left and right sides of the center gear 9.
The drive turn output transmission intermediate gear 38c is connected to the center gear 9
Of the rotating body 10 provided on the right and left the other side, the rotary body 10 and reduced
The left and right side clutches 12 are constituted by the clutch pawls provided on each side of the high speed drive turn output transmission intermediate gear 38c and the clutch pawls provided on each side clutch gear 11. Then, the reduction drive turn output transmission intermediate gear 38c
The meshing of reduction drive turn output transmission intermediate gear 38d, drive decelerate the reduction drive turn output transmission intermediate gear 38d
It meshes with the passive gear 29 for dynamic turns . 21c decelerates
Drive turn clutch, 22c is pivot / deceleration drive
Over emissions for switching shaft, 24c is decelerated driving turn transfer gear, 2
8c is a deceleration drive turn switching gear.

[0013]

[Operation] Next, the operation will be described. Engine rotation is input shaft 2
The rotation of the input shaft 2 is transmitted to the center gear 9 via the gear 3, the gear 6, the auxiliary transmission shaft 5, and the drive gear 7, and the left and right side clutches 12 on both left and right sides of the center gear 9 are turned on. By this, the left and right side clutch gears 11 rotate, and the left and right side clutch gears 11 are engaged with the first intermediate gear 1 that directly meshes with the left and right side clutch gears 11.
The rotation is transmitted to the left and right wheel shafts 19 via 7 to drive the traveling device to travel. Then, the turning mode switching lever (not shown) is set to the pivot mode, and in this state, the power steering lever (not shown) is tilted to the left or right, and for example, when tilted to the left side, the shifter 15 is actuated to the left. The side clutch gear 11 is slid, the left side clutch 12 is set to "disengaged", the shifter 15 further slides the left side clutch gear 11 with respect to the side clutch shaft 8, and the rotating disc of the left brake 14 is moved to the mission case 1. The left side clutch gear 1 is brought into contact with a fixed disk to brake the rotation of the left side clutch gear 11.
The rotation resistance of 1 decelerates the rotation of the left wheel shaft 19 to perform a left turn pivot turn (brake turn).

However, the mode switching lever is used for deceleration driving.
When switched to the dynamic turn mode, reducing the control mode of the control unit
The mode is changed to the high speed drive turn mode, the spin / deceleration drive turn switching gear 28 is meshed with the passive gear 29 for the speed reduction drive turn , and the spin / deceleration drive turn switching shaft 22 is decelerated and rotated at a predetermined speed. . In this state, if the power steering lever is tilted and tilted to the left, for example, the shifter 1
5 is operated to slide the left side clutch gear 11 to disengage the left side clutch 12, and then the left spin /
The deceleration drive turn clutch 21 is engaged to spin and reduce.
Rotate the switching shaft 22 for high- speed drive turn to the left spin / deceleration drive
Dynamic turn clutch 21, spin / deceleration drive turn transmission gear 24, spin / deceleration drive turn intermediate transmission gear 2
6, the third intermediate gear 27, the first intermediate gear 17, and the second intermediate gear 18 are transmitted to the left wheel gear 20, and the deceleration drive rotation is transmitted to the left wheel shaft 19 on the inner side of the turn, thereby making a left turn.
Make a deceleration drive turn .

In this case, the passive gear 29 for reduction drive turn
Since the rotation transmitted from the output pulley 34 for spin / deceleration drive turn to the passive split pulley 35 is speed-changed and transmitted, the rotation ratio between the wheel shaft 19 on the outside of the turn and the wheel shaft 19 on the inside of the turn is expressed by It can be arbitrarily changed such as 2: 1 to 4: 1 and the turning radius can be changed (the rotation ratio is not limited to this and is not a requirement). Then, when switching to the spin mode with the mode switching lever, the control mode of the control unit is changed to the spin mode, and the spin / deceleration drive is performed.
The turn switching gear 28 is meshed with the spin passive gear 30, and the spin / deceleration driving turn switching shaft 22 is rotated in the opposite direction. In this state, when the power steering lever is tilted and tilted to the left, for example, the control unit actuates the shifter 15 to slide the left side clutch gear 11 to turn off the left side clutch 12, and then , Left spin / deceleration drive
With the turn clutch 21 engaged, spin / deceleration drive
Transmits the rotation of the over emissions for switching shaft 22 to the left spin-reduction drive turns transfer gear 26, and transmits the rotation of the spin reduction drive turns transfer gear 26 to the left wheel gear 20, to the right wheel shaft 19 And rotate the left wheel shaft 19 in the opposite direction,
Perform a spin turn that reverses the left and right crawlers.

In this case, the rotation of the input shaft 2 of the passive spin gear 30 is changed by the transmission 33 for the spin / deceleration drive turn .
Is shifted by being transferred to the spin-reduction drive turns the output transmission gear 37, the spin-reduction drive turns from the spin-reduction drive turns the output transmission gear 37 output transmission intermediate gear 38
And spin first intermediate gear 39 and spin second intermediate gear 4
Since it is transmitted via 0, the rotation speed transmitted to the spinning passive gear 30 can be arbitrarily changed as in the case of the deceleration drive turn , and the wheel shaft 19 on the outside of the turning and the wheel shaft 19 on the inside of the turning can be changed. The turning radius can be changed by changing the reverse rotation ratio. Even in the turn of the deceleration drive turn mode, the shifter 15 is rotated to operate the brake 14 to brake the rotation of the side clutch gear 11 to decelerate the rotation of the wheel shaft 19, and then spin. Deceleration drive
Since the clutch for clutch 21 is engaged and the deceleration driving turn is performed, the side clutch 12 corresponding to the inside of the turning is disengaged to reduce the speed and drive the vehicle to turn, as in the conventional case. Since it is not, the direction change at the initial stage of turning is accelerated and automatic direction control is enabled.

Also in the spin turn, the brake 14 is operated to brake the rotation of the side clutch gear 11 to decelerate the rotation of the wheel shaft 19 inside the turn, and then the spin / deceleration drive turn clutch 21. Since a spin turn is performed by turning on and off, a shock is exerted by the brake 14 during the spin turn to reduce the shock that causes one wheel shaft 19 to rotate in the reverse direction. Not only turning off, but also turning in reverse because it gives braking (spin / reduction
(The speed driving turn clutch 21 is engaged) The timing is also advanced, and operability and traveling performance are improved. In this case, decrease
In both fast drive turn mode and spin mode,
The operation of the brake 14 and the switching of the spin / deceleration drive turn clutch 21 are controlled by the control unit, and the transmission mechanism configuration in the mission case 1 does not need to be changed.

In the embodiment shown in FIG. 4, the transmission path from the large diameter spin output transmission intermediate gear 38a to the spin switching shaft 22a via the spin small diameter intermediate gear 39a and the spin passive gear 30a, and the small diameter spin output transmission. From the intermediate gear 38b to the large diameter intermediate gear 40a for spin and the passive gear 30b for spin.
Via the transmission path to the spin switching shaft 22a via
Since the rotation is transmitted by the two transmission paths, the reverse rotation ratio between the wheel shaft 19 on the outer side of the turning and the wheel shaft 19 on the inner side of the turning can be changed when performing the spin turn. Therefore,
Since the turning radius can be changed according to the situation, operability and turning performance are improved.

Further, in the embodiment of FIG. 7, the reduction gear drive turn output transmission intermediate gear 38c fixed to the side clutch shaft 8 is provided.
Decelerating drive turn output transmission Intermediate gear 38d meshes,
Reduction drive motor the reduction drive turn output transmission intermediate gear 38d
Because it engages in over emissions for passive gear 29, reduction drive
Only by adding the deceleration drive turn switching shaft 22c provided with the turn clutch 21c, the pivot and the deceleration drive shaft are added .
Over emissions is possible. Therefore, a small-sized one having a small turning radius is particularly effective, improves the turning performance, and makes the structure compact. That is, switch to the deceleration drive turn mode,
Change the control mode of the control unit to the deceleration drive turn mode and reduce
When engaging the fast driving turn switch gear 28c to reduction drive-turn driven gear 29, reduction drive turn output transmission intermediate gear 38c, the rotation of the reduction drive turn output transmission intermediate gear 38d, transmitted to the reduction drive-turn switching shaft 22c Then, the deceleration drive turn switching shaft 22c is decelerated and rotated at a decelerated speed of a predetermined ratio. In this state, when the power steering lever is tilted and tilted to the right, for example, the shifter 15 is operated to slide the left side clutch gear 11 to turn off the right side clutch 12, and then the deceleration drive is performed. to enter a turn clutch 21c, the deceleration driving dynamic-turn switching shaft 2
2c rotation, deceleration drive turn clutch 21c, deceleration
Drive turn transmission gear 24c, first intermediate gear 17, second
It transmits to the right wheel gear 20 via the intermediate gear 18 and transmits the deceleration drive rotation to the left wheel shaft 19 on the inside of the turn, thereby performing the deceleration drive turn of the right turn.

[0020]

According to the present invention, the input shaft 2 to which the rotation of the engine is transmitted, the left and right side clutches 12 for turning on and off the rotation transmitted from the input shaft 2 to the left and right wheel shafts 19, and the one to the left and right wheel shafts 19 are transmitted. The left and right brakes 14 for braking the rotation of the left and right pivot pivot turns and a spin turn for reversing the left and right wheel shafts 19 or a predetermined number of rotations of the wheel shafts on the outer side of the left and right wheel shafts 19. In the transmission mechanism provided with a spin / deceleration drive turn clutch 21 for turning on / off the transmission of rotation for performing a deceleration drive turn performed by driving and rotating the wheel shaft on the inside of the turn according to the deceleration ratio of spin during transmission path, capable of shifting the rotation transmitting for spin reduction drive turn leading to the left and right of the spin reduction drive-turn clutch 21 Since it is obtained by the transmission of the work machine of the traveling device having a reduction drive-turn transmission 33, the reduction drive turn mode, turning outer wheel shaft 1
9 and the rotation ratio of the wheel shaft 19 on the inside of the turn from 2: 1 to
4: 1 etc., and in the spin mode, the wheel shaft 19 on the outside of the turn and the wheel shaft 1 on the inside of the turn 1
By changing the reverse rotation ratio with respect to 9, the turning radius can be changed, the turning radius can be changed, and turning can be performed according to the situation in each turning mode, and operability and traveling performance can be improved. Further, according to the present invention, the side clutch shaft 8 provided with the left and right side clutches 12 is spun and decelerated.
A drive turn output transmission intermediate gear 38 is provided to prevent the spin / reduction.
Between the high speed drive turn output transmission intermediate gear 38 and the input shaft 2, a spin / deceleration drive turn output pulley 34,
Passive split pulley 35 whose diameter can be changed to change rotation speed
And a belt 36, the transmission 33 for the spinner / deceleration drive turn is provided for the traveling device of the working machine. Therefore, the transmission 33 can be provided with a simple structure. It does not increase the cost compared to the mechanism,
Further, since the transmission 33 has a simple structure, it can be provided in the space around the input shaft 2, the space in the mission case 1 can be effectively used, and the mission case 1 can be made compact.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a mission case in a developed state.

FIG. 2 is an explanatory diagram of transmission of a deceleration drive turn .

FIG. 3 is an explanatory diagram of transmission of spin turns.

FIG. 4 is a second embodiment diagram.

FIG. 5 is an explanatory diagram of transmission of a deceleration drive turn .

FIG. 6 is an explanatory diagram of spin turn transmission.

FIG. 7 is a diagram of a third embodiment.

FIG. 8 is an explanatory diagram of transmission of a pivot turn.

FIG. 9 is an explanatory diagram of transmission of a deceleration drive turn .

[Explanation of symbols]

1 ... Mission case, 2 ... Input shaft, 3 ... Gear group, 4 ...
Shifter, 5 ... Sub-transmission shaft, 6 ... Gear group, 7 ... Drive gear, 8
... Side clutch shaft, 9 ... Center gear, 10 ... Rotating body, 11 ... Side clutch gear, 12 ... Left and right clutch,
13 ... Left and right fixed drum, 14 ... Left and right brake, 15 ... Shifter, 17 ... Intermediate gear, 18 ... Second intermediate gear, 19 ... Wheel shaft, 20 ... Wheel gear, 21 ... Spin / deceleration drive
Over emissions clutch, 21a ... spin clutch, 22 ... Spin reduction drive-turn switching shaft, 22a ... for spin switching shaft, 23 ... rotary drum, 24 ... Spin reduction drive turns <br/> transfer gear, 24a … Spin transmission gear, 25… Spin / deceleration drive turn deceleration shaft, 25a… Spin deceleration shaft,
26 ... Spin / deceleration drive turn transmission gear, 26a ... Spin transmission gear, 27 ... Third intermediate gear, 28 ... Spin
Reduction drive turn switching gear, 28a ... Spin rotation switching gear, 29 ... Passive gear for reduction drive turn , 30, 30a,
30b ... Passive gear for spin, 33 ... Spin / deceleration drive
Gearbox , 34 ... spin / deceleration drive turn output pulley, 35 ... passive split pulley, 36 ... belt, 38
a ... Large-diameter spin output transmission intermediate gear, 38b ... Small-diameter spin output transmission intermediate gear, 39 ... Spin first intermediate gear, 39
a ... Small diameter intermediate gear for spin, 40 ... Second intermediate gear for spin, 40a ... Large diameter intermediate gear for spin.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B62D 11/00

Claims (2)

(57) [Claims] 1. An input shaft 2 for transmitting engine rotation.
A left and right side clutch 12 for turning on and off the rotation transmitted from the input shaft 2 to the left and right wheel shafts 19, and a left and right wheel shaft 1
The left and right brakes 14 for braking one rotation transmitted to 9 to enable a pivoting turn, and the spin turn for reversing the left and right wheel shafts 19 or the rotation of the wheel shaft on the outer side of the left and right wheel shafts 19. In a transmission mechanism provided with a spin / deceleration drive turn clutch 21 for turning on / off transmission of rotation for performing a deceleration drive turn performed by driving and rotating a wheel shaft on the inside of a turn at a predetermined deceleration ratio with respect to the number, during transmission path from the input shaft 2 to the right and left of the spin reduction drive-turn clutch 21, provided with a spin-reduction drive-turn transmission 33 capable of shifting a rotation transmitting for spin reduction drive turns Transmission device for traveling equipment of work equipment. 2. The side clutch shaft 8 provided with the left and right side clutches 12 according to claim 1, wherein spin / deceleration driving is performed.
A dynamic turn output transmission intermediate gear 38 is provided for the spin / deceleration.
Between the drive turn output transmission intermediate gear 38 and the input shaft 2, a spin / deceleration drive turn output pulley 34 and a passive split pulley 35 capable of changing the diameter to change the rotation speed.
And a belt 36, which is a transmission device for a traveling device of a working machine, which is provided with a speed change device 33 for spin / deceleration drive turns .