JPH08275615A - Running controlling device for working machine - Google Patents

Abstract

PURPOSE: To provide a running controlling device for a working machine, equipped with a relief valve, a spinning sensor, etc., for working a right and a left brakes on a rotary track line of a revolving plate, comprising a simplified controlling mechanism, readily regulating brake force, capable of smoothly carrying out a spin turn. CONSTITUTION: A revolving plate 45 is connected through a rod 48 to be moved by a power stay lever 44 to the power stay lever 44 for controlling rotation attached to a controlling part. A relief valve 55 for working a right and a left brakes, a spinning sensor 57 for engaging and disengaging a clutch for spinning mildness and a sensor 58 for mild are installed on a rotary track line for the revolving plate 45. The relief valve 55 is laid in the vicinity of the rotation center of the revolving plate 45 and in preferably brought into contact with the revolving plate 45 before the spinning sensor 57 and the sensor 58 for mild are brought into contact with the revolving plate.

Description

Detailed Description of the Invention

[0001]

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

[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 A structure comprising a spin / mild switching transmission mechanism for switching and transmitting the rotation for a mild turn performed by drivingly rotating a wheel shaft is known.

[0003]

In the above known example, the operating mechanism is complicated and the cost is high, and the tilt angle of the power steering lever is detected by the position sensor, and the relief valve is operated by the tilt angle. Another problem is that initial setting and adjustment are troublesome.

[0004]

An object of the present invention is to simplify an operating mechanism, facilitate setting and adjustment, and facilitate control.

[0005]

According to the present invention, an input shaft 2 to which rotation of an engine is transmitted, left and right side clutches 11 for turning on / off the rotation transmitted from the input shaft 2 to the left and right wheel shafts 20, and left and right wheels. The left and right brakes 13 for braking one rotation transmitted to the shaft 20 to enable a pivoting turn to rotate, and the spin turn for reversing the left and right wheel shafts 20 or the wheel shaft on the outside of the turning of the left and right wheel shafts 20. In a mission case of a traveling device provided with a spin / mild clutch 23 for turning on / off transmission of rotation for performing a mild turn by drivingly rotating a wheel shaft on the inside of a turn at a predetermined deceleration ratio with respect to the number of revolutions , Power steering lever 4 for turning operation provided in the operation section
4 is connected to a rotating plate 45 which is rotated via a rod 48 which is moved by operating the power steering lever 44, and a relief valve 55 for operating the left and right brakes 13 is provided on a rotating locus line of the rotating plate 45. And the spin
The traveling operation device for a working machine is provided with a spin sensor 57 for opening and closing the mild clutch 23 and a mild sensor 58. According to the present invention, the relief valve 55 is provided in the vicinity of the center of rotation of the rotating plate 45, and is brought into contact with the rotating plate 45 prior to the spin sensor 57 and the mild sensor 58. It is a traveling operating device. In the present invention, the mild sensor 58 is the spin sensor 5
This is a traveling operating device for a working machine that comes into contact with the rotating plate 45 before 7.

[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. Left and right side clutch gears 1 on both left and right sides of the center gear 9.
0, and the left and right side clutches 11 are constituted by the clutch claws provided on each side clutch gear 10 and the clutch claws provided on the left and right side portions of the center gear 9.

Left and right fixed drums 12 are provided in the transmission cases 1 on both left and right sides of the side clutch shaft 8, and left and right brakes 13 are provided in the left and right fixed drums 12. The left and right brakes 13 are configured such that a rotating disc that rotates together with the side clutch gear 10 slidably contacts a fixed disc provided in the left and right fixed drums 12 so as to freely come into contact with and separate from the fixed disc. 1
A shifter 6 slides the side clutch gear 10 and the rotary disc. Reference numeral 17 denotes an intermediate shaft, and the intermediate shaft 17 has a first clutch which is always meshed with the side clutch gear 10.
The intermediate gear 18 is loosely fitted only for rotation, and the first intermediate gear 1
8 is provided with a second intermediate gear 19 that rotates integrally, and the second intermediate gear 19 is provided with a wheel gear 2 provided on left and right wheel shafts 20.
Bite 1

[0008] In the turning, however, a predetermined deceleration ratio is set with respect to the pivot turn for turning by turning the rotation of either the left or right crawler (not shown) and the number of rotations of the left and right crawlers on the outside of the turning. With a mild turn that drives and rotates the crawler inside the turning,
It is configured so that the left and right crawlers can perform a spin turn to reverse each other. Therefore, the side clutch shaft 8
A spin mild switching shaft 24 provided with a spin mild clutch 23 in the mission case 1 near the
To provide. The spin / mild clutch 23 is configured by fixing a rotary drum 25 to a spin / mild switching shaft 24, and providing a rotary disc and a transmission disc, which are rotatable integrally with the rotary drum 25, in the rotary drum 25 so as to be separable from each other. .
Further, the transmission disk is provided so as to rotate integrally with the spin / mild transmission gear 30 loosely fitted to the spin / mild switching shaft 24.

A spin / mild transmission shaft 31 for transmitting rotation to the intermediate shaft 17 is provided near the spin / mild switching shaft 24. A spin-mild transmission shaft 31 is loosely fitted with an intermediate transmission gear 32 for spin-mild that meshes with the transmission gear 30 for spin-mild, and the third transmission gear 31 is provided so as to rotate integrally with the transmission gear 32 for spin-mild. The first intermediate gear 18 is meshed with the intermediate gear 33. Then, the transmission path for spin mild is the spin mild switching gear 3 at the center of the spin mild switching shaft 24.
5 is slidably provided, a passive passive gear 36 is provided on one side of the spin / mild switching gear 35, and the spin / mild switching gear 35 is fitted in a recess formed in the mild passive gear 36 to cause spin.・ Mild switching shaft 24
The deceleration rotation for mild is transmitted to. Therefore, the mild passive gear 36 always meshes with the spin-mild output gear 37 provided so as to rotate integrally with the center gear 9, and the gear ratio of the spin-mild output gear 37 and the mild passive gear 36 is mild. Set for turn.

Further, a passive spin gear 38 is provided on the other side of the spin / mild switching gear 35 in a loosely fitted state, and the passive spin gear 38 has a first intermediate spin gear 39 provided on the intermediate shaft 17. First intermediate gear 3 for meshing and spinning
Second intermediate gear 4 for spin provided so as to rotate integrally with 9
0 is always meshed with the output gear 37 for spin mild. Then, the spin / mild switching gear 35 is slid by a shifter (not shown) and meshes with either the passive gear for mild 36 or the passive gear for spin 38 to switch between spin turn and mild turn.

Therefore, the power steering lever 44 for operating the turning such as the spin turn is provided near the driver's seat. At the base of the power steering lever 44, a horizontal plate-shaped rotating plate 4 is provided.
5 is provided, and the rotating plate 45 is provided on the frame 4 near the driver's seat.
6 is located above the window 47 formed on the rotary plate 4
An upper end of a rod 48 is pivotally attached to the lower surface of 5. Rod 48
The lower end of is attached to the vertical plate 49. The vertical plate 49 is pivotally attached to a rotary fulcrum shaft 50 attached to the frame 46 side. Reference numeral 51 is a spring provided on the vertical plate 49, and urges the rod 48 in the direction of pulling it downward. The frame 46 is provided with a detection unit 52 that detects a tilting operation of the power steering lever 44. The detection unit 52 transmits the tilting direction of the power steering lever 44 to the control unit, and at the same time, the shifter 1
6 is operated to disengage the left and right side clutches 11. A contact plate 53 is provided on the vertical plate 49, and an operating piece 56 of a relief valve 55 for the left and right brake cylinders 54 for operating the shifter 16 is exposed on the line of rotation of the contact plate 53. Further, a spin sensor 57 and a mild sensor 58 are provided above the relief valve 55. Therefore, when the power steering lever 44 is tilted, the left and right brakes 13 are first actuated, and then the spin / mild clutch 23 is engaged to perform a spin or a mild turn.

Reference numeral 60 is a mounting member for mounting the relief valve 55, spin sensor 57 and mild sensor 58, 60a is a relief valve mounting member, and 61 is a switching lever for switching the turning mode. A spin switch 62 and a mild switch 63 are provided. Further, in FIG. 6, 64 is a shifter 16
Shifter shafts, 65 and 66 are arms, 67 is a side clutch sensor for detecting that the left and right side clutches 11 are disengaged, and 68 is a wire for a parking brake.
Then, FIG. 7 shows a hydraulic circuit for pivot turn,
FIG. 8 shows a hydraulic circuit for controlling the spin / mild clutch 23, which is composed of a pivot turn and a spin mild turn separately. Reference numeral 69 is a cylinder for entering the left and right spin / mild clutch 23, which is formed in the rotary drum 25. Reference numeral 70 denotes a relief valve for maintaining a constant pressure, which maintains a neutral position in which the side clutch 11 and the brake 13 are not engaged in the spin mild mode.

FIGS. 10 and 11 show a second embodiment, in which the distance L1 from the rotary fulcrum shaft 50 to the relief valve 55 is L1.
The distance L2 from the rotation fulcrum shaft 50 to the spin sensor 57 (mild sensor 58) is increased to improve the sensing performance of the spin sensor 57 (mild sensor 58). Further, in the embodiment of FIG. 12, the spin sensor 57 is separated from the contact plate 53 rather than the mild sensor 58,
Therefore, the braking force by the relief valve 55 is strengthened.

[0014]

[Operation] Next, the operation will be described. Engine rotation is input shaft 2
When the rotation of the input shaft 2 is transmitted to the center gear 9 to raise the power steering lever 44, the detection unit 5
2 does not detect the tilting operation of the power steering lever 44, the control unit contracts (extends) the left and right brake cylinders 54 to rotate the shifter 16, and the side clutch gear 10 is connected to the clutch pawls on both the left and right sides of the center gear 9. The provided clutch pawls are engaged to set the left and right side clutches 11 to “on”, whereby the left and right side clutch gears 10 rotate, and the left and right side clutch gears 10 rotate on the left and right wheel shafts 20 via the first intermediate gear 18. Is transmitted to drive the traveling device to drive. Then, when the turn mode switching lever 61 is in the pivot mode, both the spin switch 62 and the mild switch 63 are turned off, and the control section is set in the pivot mode.
Is tilted to either the left or right, for example, when tilted to the left, the right side of the rotary plate 45 moves upward and the right side detection unit 52 is turned on, whereby the control unit operates the shifter 16. The left side clutch gear 10 is slid, and the left side clutch 11 is turned off.

At the same time, when the power steering lever 44 is tilted to the left side, the rotary plate 45 pulls the rod 48, and the rod 48 rotates the vertical plate 49 about the rotary fulcrum shaft 50 to rotate the vertical plate 49. Abutting plate 53 due to movement
Pushes the operating piece 56 of the relief valve 55, the relief valve 55 operates the left brake cylinder 54 to rotate the shifter 16, and the shifter 16 turns the left side clutch gear 1
0 further slides on the side clutch shaft 8 to bring the rotating disc of the left brake 13 into contact with the fixed disc fixed to the mission case 1 to brake the rotation of the left side clutch gear 10 and The rotation resistance of 10 decelerates the rotation of the left wheel shaft 20 to perform a left turn pivot turn (brake turn). In this case, since the rotating plate 45 is rotated with its edge as a fulcrum, the rod 48 is pulled upward and the vertical plate 49 is moved to the relief valve 55 side even if the power steering lever 44 is tilted to the left or right. Only turn, power steering lever 4
When 4 is released, the spring 51 restores its elasticity.

However, when the mode switching lever 61 is switched to the mild mode, the mild switch 63 detects this and changes the control mode of the control unit to the mild mode, and the shifter shifts the spin / mild switching gear 35 to the mild passive mode. The spin / mild switching shaft 24 is meshed with the gear 36 to rotate the spin / mild switching shaft 24 at a decelerated speed. In this state, when the power steering lever is tilted and tilted to the left, for example, the detection unit 52 is turned on and the control unit actuates the shifter 16 to slide the left side clutch gear 10 as described above. The left side clutch 11 to "disengage", and at the same time, the vertical plate 49 causes the operating plate 56 of the relief valve 55 to operate by tilting the power steering lever 44 to the left.
To activate the left brake cylinder 54, which in turn rotates the shifter 16 to activate the left brake 13,
The rotation of the left side clutch gear 10 is braked, the rotation of the left wheel shaft 20 is decelerated by the rotation resistance of the left side clutch gear 10, and then the left spin mild clutch 23 is turned on to make the spin mild rotation. The rotation of the transmission shaft 31 is transmitted to the left spin-mild transmission gear 32, and the rotation of the spin-mild transmission gear 32 is rotated to the left wheel gear 21.
To the left wheel shaft 20 on the inner side of the turn to transmit the deceleration drive rotation to perform a left turn mild turn.

Therefore, even when making a mild turn,
Since braking is applied by the brake 13, the reaction at the initial stage of turning can be sensitively performed, and automatic direction control can be performed even in the mild turn mode. That is, conventionally, the side clutch 11 corresponding to the inside of the turn is disengaged to decelerate the speed to 1/3 of the normal rotation, and then the vehicle is driven at this rotation speed to rotate, so the direction change at the initial stage of turning is slow. ,
The automatic direction control could not be performed. Then, when the mode switching lever 61 is switched to the spin mode, the spin switch 62 detects this and changes the control mode of the control unit to the spin mode, and the shifter shifts the spin / mild switching gear 35 to the spin passive gear 38. Bite, spin
The mild switching shaft 24 is rotated in the opposite direction. In this state, when the power steering lever is tilted and tilted to the left, for example, the detection unit 52 is turned on and the control unit actuates the shifter 16 to move the left side clutch gear 1 in the same manner as described above.
0 to slide the left side clutch 11 to "disengage", and at the same time, the left brake 13 is operated by tilting the power steering lever 44 to the left side to brake the rotation of the left side clutch gear 10 and The rotation resistance of the left wheel shaft 20 reduces the rotation of the left wheel shaft 20, then the left spin mild clutch 23 is engaged, and the rotation of the spin mild transmission shaft 31 is transmitted to the left spin mild transmission gear 32. , The rotation of the spin / mild transmission gear 32 is transmitted to the left wheel gear 21 to rotate the left wheel shaft 20 and the right wheel shaft 20 in opposite directions to each other, thereby performing a spin turn in which the left and right crawlers are reversed to each other.

In this case, since the brake 13 applies braking even during a spin turn, one wheel shaft 20
There is little shock to reverse rotation, and not only the side clutch 11 on the inside of the turn is disengaged, but also the timing of reverse rotation (with the spin / mild clutch 23) is accelerated because braking is applied, and operability and Driving performance is improved. Also, automatic direction control can be performed in the spin turn mode. Then, a rotating plate 45 which is rotated by the operation of the power steering lever 44 is connected to the power steering lever 44 for turning operation via only a rod 48,
Since the rotary plate 45 directly operates the relief valve 55 for the brake cylinder 54, the rotary plate 45 can be constructed very easily and, moreover, there is no rattling on the way, so that the rotary plate 45 operates accurately.
Further, a spin sensor 57 is provided above the relief valve 55.
Further, since the mild sensor 58 is provided, the left and right brakes 13 can be operated first and then the spin mild clutch 23 can be operated with a simple configuration.

In this case, the amount of movement of the operating piece 56 of the relief valve 55 changes depending on the tilt angle of the power steering lever 44, thereby changing the hydraulic pressure of the left and right brake cylinders 54 and changing the braking force. Therefore, the braking force can be easily adjusted only by adjusting the position of the relief valve 55. Further, since the spin sensor 57 and the mild sensor 58 are provided above the relief valve 55, a more appropriate braking force can be set with the two sensors of spin and mild. For example, set a weak braking force during a mild turn to make a smooth turn. Further, as shown in FIGS. 10 and 11, the rotation fulcrum shaft 50
From the rotation fulcrum shaft 50 to the spin sensor 57 (sensor for mild 58) from the distance L1 from the relief valve 55 to
Since the distance L2 up to is large, the rotation amount of the contact plate 53 becomes large, and the spin sensor 57 (mild sensor 5
8) Make sure contact with and improve the sensing performance.

Further, since the spin sensor 57 is farther from the contact plate 53 than the mild sensor 58, the braking force at the time of spin turn can be strongly actuated. In the turning control, since the hydraulic circuits for controlling the left and right brakes 13 and the spin mild clutch 23 are separately configured, the control is not only reliable but also
In the unlikely event of a failure in one of them, it is possible to secure a travelable state and easily take subsequent actions.

[0021]

According to the present invention, the input shaft 2 to which the rotation of the engine is transmitted, the left and right side clutches 11 for turning on and off the rotation transmitted from the input shaft 2 to the left and right wheel shafts 20, and the one to the left and right wheel shafts 20 are transmitted. The left and right brakes 13 for braking the rotation of the left and right pivot pivot turns, and the spin turns for reversing the left and right wheel shafts 20 or a predetermined number of rotations of the wheel shafts on the outer side of the left and right wheel shafts 20. In the mission case of the traveling device, which is provided with the spin mild clutch 23 for turning on / off the transmission of rotation for performing a mild turn performed by driving and rotating the wheel shaft inside the turning according to the deceleration ratio of The power steering lever 44 for turning operation includes a rotating plate 4 which rotates via a rod 48 which is moved by the operation of the power steering lever 44. Connect, a relief valve 55 for actuating the right and left brake 13 on rotation locus line of the pivoting plate 45, the spin Mild clutch 2
Since the traveling operation device of the working machine is provided with the spin sensor 57 and the mild sensor 58 for turning 3 in and out, the relief valve 55 is directly operated by the rotating plate 45 which is rotated by the operation of the power steering lever 44.
It is very easy to construct and has no rattling on the way, so it operates correctly. Further, the braking force can be easily adjusted only by adjusting the position of the relief valve 55.

The present invention also provides the relief valve 55.
Is a traveling operating device for a working machine, which is provided in the vicinity of the center of rotation of the rotating plate 45 and comes into contact with the rotating plate 45 before the spin sensor 57 and the mild sensor 58. Therefore, even when making a mild turn, since the side clutch 11 corresponding to the inside of the turn is disengaged and the brake 13 is applied, it is possible to quickly decelerate to the set number of revolutions and sensitively react at the beginning of the turn. , Even in mild turn mode,
Automatic direction control can be performed. Even when making a spin turn, since one wheel shaft 20 is rotated in the reverse direction after the brake 13 is applied, there is less shock when the spin / mild clutch 23 is turned on and off, and the timing before the reverse rotation is also accelerated. , Operability and driving performance are improved. Also, by adjusting the positions of the relief valve 55, the spin sensor 57, and the mild sensor 58, a more appropriate braking force can be set, and the braking force can be set weaker during a mild turn, resulting in a smooth turning. it can. Further, since the spin sensor 57 (mild sensor 58) comes into contact with the relief valve 55 later, the turning amount of the turning plate 45 becomes large, so that the spin sensor 57 (mild sensor 58) comes into contact reliably. , Improve the sensing performance.

Further, according to the present invention, the mild sensor 5 is provided.
Reference numeral 8 denotes the rotary plate 4 prior to the spin sensor 57.
Since it is the traveling operating device of the working machine that is brought into contact with 5, the braking force at the time of spin-turning can be strongly actuated, and the spin-turning can be smoothly performed.

[Brief description of drawings]

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

FIG. 2 is a side view of a power steering lever operation mechanism.

FIG. 3 is a perspective view of a mounting member such as a sensor.

FIG. 4 is a plan view showing a mounting state of sensors and the like.

FIG. 5 is a side view of a switching lever.

FIG. 6 is a front view of a brake cylinder.

FIG. 7 is a hydraulic circuit diagram.

FIG. 8 is a hydraulic circuit diagram for spin / mild turn.

9 is a partially enlarged view of the hydraulic circuit diagram of FIG. 7.

FIG. 10 is a second embodiment of the power steering lever operation mechanism.

FIG. 11 is a plan view of the same.

FIG. 12 is a plan view of the third embodiment.

[Explanation of Codes] 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 ... side clutch gear, 11 ... left and right clutch, 12 ... left and right fixed drum, 13 ... left and right brake, 17 ... intermediate shaft, 18 ... intermediate gear, 19 ... second intermediate gear, 20 … Wheel shaft, 21… Wheel gear, 23… Spin mild clutch, 24…
Switch shaft for spin mild, 25 ... Rotating drum, 30 ...
Spin-mild transmission gear, 31 ... Spin-mild transmission shaft, 32 ... Spin-mild transmission gear, 33 ...
Third intermediate gear, 35 ... Spin / mild switching gear, 36
... Passive gears for mild, 37 ... Output gears for spin / mild, 38 ... Passive gears for spin, 39 ... First intermediate gear for spin, 40 ... Second intermediate gear for spin, 44 ... Power steering lever, 45 ... Rotating plate , 46 ... Frame, 47 ...
Window, 48 ... Rod, 49 ... Vertical plate, 50 ... Rotating fulcrum shaft, 51 ... Spring, 52 ... Detection part, 53 ... Contact plate, 54 ...
Left and right brake cylinders, 55 ... Relief valve, 56 ...
Actuating piece, 57 ... Spin sensor, 58 ... Mild sensor, 60 ... Mounting member, 60a ... Relief valve mounting member, 61 ... Switching lever, 62 ... Spin switch, 63
… Mild switch, 64… Shifter shaft, 65, 66…
Arm, 67 ... Sensor for side clutch, 68 ... Wire for parking brake, 69 ... Cylinder, 70 ... Relief valve.

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[Procedure amendment]

[Submission date] June 28, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 3]

[Figure 4]

[Figure 5]

FIG. 11

FIG.

[Fig. 2]

[Figure 6]

[Figure 8]

[Figure 10]

[Figure 7]

[Figure 9]

[Fig. 12]

Claims (3)

[Claims] 1. An input shaft 2 for transmitting engine rotation.
A left and right side clutch 11 for turning on and off the rotation transmitted from the input shaft 2 to the left and right wheel shafts 20, and a left and right wheel shaft 2
The left and right brakes 13 for braking one rotation transmitted to 0 to enable a pivoting turn and a spin turn for reversing the left and right wheel shafts 20 or a rotation of a wheel shaft on the outer side of the left and right wheel shafts 20. In a mission case of a traveling device provided with a spin / mild clutch 23 for turning on / off transmission of rotation for performing a mild turn performed by driving and rotating a wheel shaft on the inside of a turn at a predetermined deceleration ratio with respect to a number, A turning plate 45 for turning is connected to a power steering lever 44 for turning operation provided on the operation portion, and a turning plate 45 that turns via a rod 48 that moves by the operation of the power steering lever 44 is connected to the turning locus line of the turning plate 45. Is a relief valve 55 that operates the left and right brakes 13, and the spin mild clutch 23.
A traveling operation device for a working machine, which is provided with a spin sensor 57 and a mild sensor 58 for turning on and off. 2. The spin valve 57 and the mild sensor 5 according to claim 1, wherein the relief valve 55 is provided near a rotation center of the rotation plate 45.
A traveling operation device for a working machine, which is adapted to come into contact with the rotary plate 45 before 8. 3. The traveling operating device for a working machine according to claim 2, wherein the mild sensor 58 comes into contact with the rotating plate 45 before the spin sensor 57.